From a4b13dbed9ff21c3b992ee21ba708730186296e4 Mon Sep 17 00:00:00 2001 From: George Hazan Date: Sat, 25 Apr 2020 11:57:29 +0300 Subject: libmdbx: merge with 0.7 final version --- libs/libmdbx/libmdbx.vcxproj | 11 +- libs/libmdbx/src/CMakeLists.dist-minimal | 308 - libs/libmdbx/src/CMakeLists.txt | 613 +- libs/libmdbx/src/GNUmakefile | 101 +- libs/libmdbx/src/README.md | 54 +- libs/libmdbx/src/appveyor.yml | 2 +- libs/libmdbx/src/cmake/compiler.cmake | 106 +- libs/libmdbx/src/cmake/utils.cmake | 47 +- libs/libmdbx/src/config.h | 52 + libs/libmdbx/src/mdbx.h | 131 +- libs/libmdbx/src/src/CMakeLists.txt | 263 - libs/libmdbx/src/src/alloy.c | 14 +- libs/libmdbx/src/src/config.h.in | 52 + libs/libmdbx/src/src/core.c | 18322 ++++++++++++++++++++++++++ libs/libmdbx/src/src/debug_begin.h | 34 + libs/libmdbx/src/src/debug_end.h | 7 + libs/libmdbx/src/src/defs.h | 425 + libs/libmdbx/src/src/elements/config.h | 56 - libs/libmdbx/src/src/elements/config.h.in | 56 - libs/libmdbx/src/src/elements/core.c | 18301 ------------------------- libs/libmdbx/src/src/elements/debug_begin.h | 34 - libs/libmdbx/src/src/elements/debug_end.h | 7 - libs/libmdbx/src/src/elements/defs.h | 425 - libs/libmdbx/src/src/elements/internals.h | 1331 -- libs/libmdbx/src/src/elements/lck-posix.c | 814 -- libs/libmdbx/src/src/elements/lck-windows.c | 801 -- libs/libmdbx/src/src/elements/ntdll.def | 1244 -- libs/libmdbx/src/src/elements/options.h | 211 - libs/libmdbx/src/src/elements/osal.c | 2187 --- libs/libmdbx/src/src/elements/osal.h | 927 -- libs/libmdbx/src/src/elements/version.c | 46 - libs/libmdbx/src/src/elements/version.c.in | 46 - libs/libmdbx/src/src/internals.h | 1346 ++ libs/libmdbx/src/src/lck-posix.c | 839 ++ libs/libmdbx/src/src/lck-windows.c | 801 ++ libs/libmdbx/src/src/man1/mdbx_chk.1 | 2 +- libs/libmdbx/src/src/man1/mdbx_copy.1 | 2 +- libs/libmdbx/src/src/man1/mdbx_dump.1 | 2 +- libs/libmdbx/src/src/man1/mdbx_load.1 | 2 +- libs/libmdbx/src/src/man1/mdbx_stat.1 | 2 +- libs/libmdbx/src/src/mdbx_chk.c | 1472 +++ libs/libmdbx/src/src/mdbx_copy.c | 143 + libs/libmdbx/src/src/mdbx_dump.c | 389 + libs/libmdbx/src/src/mdbx_load.c | 618 + libs/libmdbx/src/src/mdbx_stat.c | 445 + libs/libmdbx/src/src/ntdll.def | 1244 ++ libs/libmdbx/src/src/options.h | 213 + libs/libmdbx/src/src/osal.c | 2206 ++++ libs/libmdbx/src/src/osal.h | 944 ++ libs/libmdbx/src/src/tools/CMakeLists.txt | 60 - libs/libmdbx/src/src/tools/mdbx_chk.c | 1466 --- libs/libmdbx/src/src/tools/mdbx_copy.c | 143 - libs/libmdbx/src/src/tools/mdbx_dump.c | 389 - libs/libmdbx/src/src/tools/mdbx_load.c | 617 - libs/libmdbx/src/src/tools/mdbx_stat.c | 445 - libs/libmdbx/src/src/tools/wingetopt.c | 95 - libs/libmdbx/src/src/tools/wingetopt.h | 30 - libs/libmdbx/src/src/version.c.in | 46 + libs/libmdbx/src/src/wingetopt.c | 95 + libs/libmdbx/src/src/wingetopt.h | 30 + libs/libmdbx/src/test/CMakeLists.txt | 23 +- libs/libmdbx/src/test/base.h | 6 +- libs/libmdbx/src/test/osal-unix.cc | 4 + libs/libmdbx/src/test/osal-windows.cc | 12 +- libs/libmdbx/src/test/pcrf/CMakeLists.txt | 5 - libs/libmdbx/src/version.c | 46 + 66 files changed, 30605 insertions(+), 30605 deletions(-) delete mode 100644 libs/libmdbx/src/CMakeLists.dist-minimal create mode 100644 libs/libmdbx/src/config.h delete mode 100644 libs/libmdbx/src/src/CMakeLists.txt create mode 100644 libs/libmdbx/src/src/config.h.in create mode 100644 libs/libmdbx/src/src/core.c create mode 100644 libs/libmdbx/src/src/debug_begin.h create mode 100644 libs/libmdbx/src/src/debug_end.h create mode 100644 libs/libmdbx/src/src/defs.h delete mode 100644 libs/libmdbx/src/src/elements/config.h delete mode 100644 libs/libmdbx/src/src/elements/config.h.in delete mode 100644 libs/libmdbx/src/src/elements/core.c delete mode 100644 libs/libmdbx/src/src/elements/debug_begin.h delete mode 100644 libs/libmdbx/src/src/elements/debug_end.h delete mode 100644 libs/libmdbx/src/src/elements/defs.h delete mode 100644 libs/libmdbx/src/src/elements/internals.h delete mode 100644 libs/libmdbx/src/src/elements/lck-posix.c delete mode 100644 libs/libmdbx/src/src/elements/lck-windows.c delete mode 100644 libs/libmdbx/src/src/elements/ntdll.def delete mode 100644 libs/libmdbx/src/src/elements/options.h delete mode 100644 libs/libmdbx/src/src/elements/osal.c delete mode 100644 libs/libmdbx/src/src/elements/osal.h delete mode 100644 libs/libmdbx/src/src/elements/version.c delete mode 100644 libs/libmdbx/src/src/elements/version.c.in create mode 100644 libs/libmdbx/src/src/internals.h create mode 100644 libs/libmdbx/src/src/lck-posix.c create mode 100644 libs/libmdbx/src/src/lck-windows.c create mode 100644 libs/libmdbx/src/src/mdbx_chk.c create mode 100644 libs/libmdbx/src/src/mdbx_copy.c create mode 100644 libs/libmdbx/src/src/mdbx_dump.c create mode 100644 libs/libmdbx/src/src/mdbx_load.c create mode 100644 libs/libmdbx/src/src/mdbx_stat.c create mode 100644 libs/libmdbx/src/src/ntdll.def create mode 100644 libs/libmdbx/src/src/options.h create mode 100644 libs/libmdbx/src/src/osal.c create mode 100644 libs/libmdbx/src/src/osal.h delete mode 100644 libs/libmdbx/src/src/tools/CMakeLists.txt delete mode 100644 libs/libmdbx/src/src/tools/mdbx_chk.c delete mode 100644 libs/libmdbx/src/src/tools/mdbx_copy.c delete mode 100644 libs/libmdbx/src/src/tools/mdbx_dump.c delete mode 100644 libs/libmdbx/src/src/tools/mdbx_load.c delete mode 100644 libs/libmdbx/src/src/tools/mdbx_stat.c delete mode 100644 libs/libmdbx/src/src/tools/wingetopt.c delete mode 100644 libs/libmdbx/src/src/tools/wingetopt.h create mode 100644 libs/libmdbx/src/src/version.c.in create mode 100644 libs/libmdbx/src/src/wingetopt.c create mode 100644 libs/libmdbx/src/src/wingetopt.h delete mode 100644 libs/libmdbx/src/test/pcrf/CMakeLists.txt create mode 100644 libs/libmdbx/src/version.c (limited to 'libs/libmdbx') diff --git a/libs/libmdbx/libmdbx.vcxproj b/libs/libmdbx/libmdbx.vcxproj index e7d489ca88..6f690abef4 100644 --- a/libs/libmdbx/libmdbx.vcxproj +++ b/libs/libmdbx/libmdbx.vcxproj @@ -26,23 +26,20 @@ - MDBX_CONFIG_MANUAL_TLS_CALLBACK=1;MDBX_DEBUG=1;LIBMDBX_EXPORTS;%(PreprocessorDefinitions) + MDBX_CONFIG_MANUAL_TLS_CALLBACK=1;MDBX_DEBUG=1;LIBMDBX_EXPORTS;__STDC_FORMAT_MACROS=1;__STDC_LIMIT_MACROS=1;__STDC_CONSTANT_MACROS=1;_HAS_EXCEPTIONS=1;MDBX_CONFIG_H=1;%(PreprocessorDefinitions) ntdll.lib;%(AdditionalDependencies) - + NotUsing - + NotUsing - - NotUsing - - + NotUsing diff --git a/libs/libmdbx/src/CMakeLists.dist-minimal b/libs/libmdbx/src/CMakeLists.dist-minimal deleted file mode 100644 index fdcd41d308..0000000000 --- a/libs/libmdbx/src/CMakeLists.dist-minimal +++ /dev/null @@ -1,308 +0,0 @@ -## -## This is the minimal template for CMakeList.txt which could be used -## to build libmdbx from the "amalgamated form" of libmdbx's source code. -## -## The amalgamated form is intended to embedding libmdbx in other projects -## in cases when using as git-submodule is not acceptable or inconveniently. -## -## The amalgamated form could be generated from full git repository -## on Linux just by `make dist`. -## - -## -## Copyright 2020 Leonid Yuriev -## and other libmdbx authors: please see AUTHORS file. -## All rights reserved. -## -## Redistribution and use in source and binary forms, with or without -## modification, are permitted only as authorized by the OpenLDAP -## Public License. -## -## A copy of this license is available in the file LICENSE in the -## top-level directory of the distribution or, alternatively, at -## . -## - -## -## libmdbx = { Revised and extended descendant of Symas LMDB. } -## Please see README.md at https://github.com/erthink/libmdbx -## -## Libmdbx is superior to LMDB in terms of features and reliability, -## not inferior in performance. libmdbx works on Linux, FreeBSD, MacOS X -## and other systems compliant with POSIX.1-2008, but also support Windows -## as a complementary platform. -## -## The next version is under active non-public development and will be -## released as MithrilDB and libmithrildb for libraries & packages. -## Admittedly mythical Mithril is resembling silver but being stronger and -## lighter than steel. Therefore MithrilDB is rightly relevant name. -## -## MithrilDB will be radically different from libmdbx by the new database -## format and API based on C++17, as well as the Apache 2.0 License. -## The goal of this revolution is to provide a clearer and robust API, -## add more features and new valuable properties of database. -## -## The Future will (be) Positive. Всё будет хорошо. -## - -cmake_minimum_required(VERSION 3.8.2) -cmake_policy(PUSH) -cmake_policy(VERSION 3.8.2) -if(NOT CMAKE_VERSION VERSION_LESS 3.9) - cmake_policy(SET CMP0069 NEW) -endif() -if(NOT CMAKE_VERSION VERSION_LESS 3.12) - cmake_policy(SET CMP0075 NEW) -endif() -if(NOT CMAKE_VERSION VERSION_LESS 3.13) - cmake_policy(SET CMP0077 NEW) -endif() - -if(DEFINED PROJECT_NAME) - set(SUBPROJECT ON) - set(NOT_SUBPROJECT OFF) -else() - set(SUBPROJECT OFF) - set(NOT_SUBPROJECT ON) - project(libmdbx C CXX) -endif() - -find_package(Threads REQUIRED) - -if(NOT CMAKE_BUILD_TYPE) - set(CMAKE_BUILD_TYPE MinSizeRel CACHE STRING - "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel." - FORCE) -endif() - -list(FIND CMAKE_C_COMPILE_FEATURES c_std_11 HAS_C11) -if(NOT HAS_C11 LESS 0) - set(MDBX_C_STANDARD 11) -else() - set(MDBX_C_STANDARD 99) -endif() -message(STATUS "Use C${MDBX_C_STANDARD} for libmdbx") - -# not supported by this (minimal) script -add_definitions(-DMDBX_AVOID_CRT=0) - -# provide build timestamp -string(TIMESTAMP MDBX_BUILD_TIMESTAMP UTC) -add_definitions(-DMDBX_BUILD_TIMESTAMP="${MDBX_BUILD_TIMESTAMP}") - -# provide compiler info -execute_process(COMMAND sh -c "${CMAKE_C_COMPILER} --version | head -1" - OUTPUT_VARIABLE MDBX_BUILD_COMPILER - OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_QUIET - RESULT_VARIABLE rc) -if(rc OR NOT MDBX_BUILD_COMPILER) - string(STRIP "${CMAKE_C_COMPILER_ID}-${CMAKE_C_COMPILER_VERSION}" MDBX_BUILD_COMPILER) -endif() -add_definitions(-DMDBX_BUILD_COMPILER="${MDBX_BUILD_COMPILER}") - -# provide cpu/arch-system pair -if(CMAKE_C_COMPILER_TARGET) - set(MDBX_BUILD_TARGET "${CMAKE_C_COMPILER_TARGET}") -elseif(CMAKE_C_PLATFORM_ID AND NOT CMAKE_C_PLATFORM_ID STREQUAL CMAKE_SYSTEM_NAME) - string(STRIP "${CMAKE_C_PLATFORM_ID}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -elseif(CMAKE_LIBRARY_ARCHITECTURE) - string(STRIP "${CMAKE_LIBRARY_ARCHITECTURE}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -elseif(CMAKE_GENERATOR_PLATFORM AND NOT CMAKE_C_PLATFORM_ID STREQUAL CMAKE_SYSTEM_NAME) - string(STRIP "${CMAKE_GENERATOR_PLATFORM}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -elseif(CMAKE_SYSTEM_ARCH) - string(STRIP "${CMAKE_SYSTEM_ARCH}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -else() - string(STRIP "${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -endif() -add_definitions(-DMDBX_BUILD_TARGET="${MDBX_BUILD_TARGET}") - -# provide build target-config -if(CMAKE_CONFIGURATION_TYPES) - add_definitions(-DMDBX_BUILD_CONFIG="$") -else() - add_definitions(-DMDBX_BUILD_CONFIG="${CMAKE_BUILD_TYPE}") -endif() - -# provide build cflags -set(MDBX_BUILD_FLAGS "") -list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_FLAGS}) -list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_DEFINES}) -if(CMAKE_CONFIGURATION_TYPES) - add_definitions(-DMDBX_BUILD_FLAGS_CONFIG="$<$:${CMAKE_C_FLAGS_DEBUG} ${CMAKE_C_DEFINES_DEBUG}>$<$:${CMAKE_C_FLAGS_RELEASE} ${CMAKE_C_DEFINES_RELEASE}>$<$:${CMAKE_C_FLAGS_RELWITHDEBINFO} ${CMAKE_C_DEFINES_RELWITHDEBINFO}>$<$:${CMAKE_C_FLAGS_MINSIZEREL} ${CMAKE_C_DEFINES_MINSIZEREL}>") -else() - string(TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UPPERCASE) - list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}) - list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_DEFINES_${CMAKE_BUILD_TYPE_UPPERCASE}}) -endif() -list(REMOVE_DUPLICATES MDBX_BUILD_FLAGS) -string(REPLACE ";" " " MDBX_BUILD_FLAGS "${MDBX_BUILD_FLAGS}") -add_definitions(-DMDBX_BUILD_FLAGS="${MDBX_BUILD_FLAGS}") - -# shared library -if(NOT DEFINED MDBX_BUILD_SHARED_LIBRARY) - if(DEFINED BUILD_SHARED_LIBS) - option(MDBX_BUILD_SHARED_LIBRARY "Build libmdbx as shared library (DLL)" ${BUILD_SHARED_LIBS}) - else() - option(MDBX_BUILD_SHARED_LIBRARY "Build libmdbx as shared library (DLL)" ON) - endif() -endif() -if(MDBX_BUILD_SHARED_LIBRARY) - add_library(mdbx SHARED mdbx.c mdbx.h) - set_target_properties(mdbx PROPERTIES - C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON - PUBLIC_HEADER mdbx.h) - target_compile_definitions(mdbx PRIVATE LIBMDBX_EXPORTS INTERFACE LIBMDBX_IMPORTS) - if(DEFINED INTERPROCEDURAL_OPTIMIZATION) - set_target_properties(mdbx PROPERTIES - INTERPROCEDURAL_OPTIMIZATION $) - endif() - target_link_libraries(mdbx PRIVATE ${CMAKE_THREAD_LIBS_INIT}) - if(WIN32) - target_link_libraries(mdbx PRIVATE ntdll.lib) - endif() - if(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS" OR ${CMAKE_SYSTEM_NAME} STREQUAL "Solaris") - target_link_libraries(mdbx PRIVATE kstat) - endif() -endif() - -# static library used for tools, to avoid rpath/dll-path troubles -add_library(mdbx-static STATIC mdbx.c mdbx.h) -set_target_properties(mdbx-static PROPERTIES - C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON - PUBLIC_HEADER mdbx.h) -target_link_libraries(mdbx-static INTERFACE ${CMAKE_THREAD_LIBS_INIT}) -if(DEFINED INTERPROCEDURAL_OPTIMIZATION) - set_target_properties(mdbx-static PROPERTIES - INTERPROCEDURAL_OPTIMIZATION $) -endif() -if(WIN32) - target_link_libraries(mdbx-static INTERFACE ntdll.lib) -endif() -if(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS" OR ${CMAKE_SYSTEM_NAME} STREQUAL "Solaris") - target_link_libraries(mdbx-static INTERFACE kstat) -endif() - -# mdbx-tools -foreach(TOOL mdbx_chk mdbx_copy mdbx_stat mdbx_dump mdbx_load) - add_executable(${TOOL} ${TOOL}.c) - set_target_properties(${TOOL} PROPERTIES - C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON) - if(DEFINED INTERPROCEDURAL_OPTIMIZATION) - set_target_properties(${TOOL} PROPERTIES - INTERPROCEDURAL_OPTIMIZATION $) - endif() - target_link_libraries(${TOOL} mdbx-static) -endforeach() - -# installation -if(MDBX_BUILD_SHARED_LIBRARY) - if(CMAKE_VERSION VERSION_LESS 3.12) - install(TARGETS mdbx EXPORT libmdbx - RUNTIME - DESTINATION bin - COMPONENT runtime - LIBRARY - DESTINATION lib - COMPONENT runtime - OBJECTS - DESTINATION lib - COMPONENT devel - ARCHIVE - DESTINATION lib - COMPONENT devel - PUBLIC_HEADER - DESTINATION include - COMPONENT devel - INCLUDES - DESTINATION include - COMPONENT devel) - else() - install(TARGETS mdbx EXPORT libmdbx - RUNTIME - DESTINATION bin - COMPONENT runtime - LIBRARY - DESTINATION lib - COMPONENT runtime - NAMELINK_COMPONENT devel - OBJECTS - DESTINATION lib - COMPONENT devel - ARCHIVE - DESTINATION lib - COMPONENT devel - PUBLIC_HEADER - DESTINATION include - COMPONENT devel - INCLUDES - DESTINATION include - COMPONENT devel) - endif() -endif() - -if(CMAKE_VERSION VERSION_LESS 3.12) - install(TARGETS mdbx-static EXPORT libmdbx EXCLUDE_FROM_ALL - RUNTIME - DESTINATION bin - COMPONENT runtime - LIBRARY - DESTINATION lib - COMPONENT runtime - OBJECTS - DESTINATION lib - COMPONENT devel - ARCHIVE - DESTINATION lib - COMPONENT devel - PUBLIC_HEADER - DESTINATION include - COMPONENT devel - INCLUDES - DESTINATION include - COMPONENT devel) -else() - install(TARGETS mdbx-static EXPORT libmdbx EXCLUDE_FROM_ALL - RUNTIME - DESTINATION bin - COMPONENT runtime - LIBRARY - DESTINATION lib - COMPONENT runtime - NAMELINK_COMPONENT devel - OBJECTS - DESTINATION lib - COMPONENT devel - ARCHIVE - DESTINATION lib - COMPONENT devel - PUBLIC_HEADER - DESTINATION include - COMPONENT devel - INCLUDES - DESTINATION include - COMPONENT devel) -endif() - -install( - TARGETS - mdbx_chk - mdbx_stat - mdbx_copy - mdbx_dump - mdbx_load - RUNTIME - DESTINATION bin - COMPONENT runtime) - -install( - FILES - man1/mdbx_chk.1 - man1/mdbx_stat.1 - man1/mdbx_copy.1 - man1/mdbx_dump.1 - man1/mdbx_load.1 - DESTINATION man/man1 - COMPONENT doc) - -cmake_policy(POP) diff --git a/libs/libmdbx/src/CMakeLists.txt b/libs/libmdbx/src/CMakeLists.txt index e67cdbe92a..a17bd35ab6 100644 --- a/libs/libmdbx/src/CMakeLists.txt +++ b/libs/libmdbx/src/CMakeLists.txt @@ -35,6 +35,7 @@ ## cmake_minimum_required(VERSION 3.8.2) + cmake_policy(PUSH) cmake_policy(VERSION 3.8.2) if(NOT CMAKE_VERSION VERSION_LESS 3.13) @@ -51,17 +52,42 @@ else() set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_AVAILABLE FALSE) endif() +if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/core.c" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/alloy.c" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/config.h.in" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/version.c.in" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/man1" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/src/mdbx_chk.c") + set(MDBX_AMALGAMATED_SOURCE FALSE) + find_program(GIT git) + if(NOT GIT) + message(SEND_ERROR "Git command-line tool not found") + endif() + set(MDBX_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src") +elseif(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/VERSION" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/mdbx.c" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/config.h.in" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/man1" AND + EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/mdbx_chk.c") + set(MDBX_AMALGAMATED_SOURCE TRUE) + set(MDBX_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}") +else() + message(FATAL_ERROR "Please use libmdbx as a git-submodule or the amalgamated source code") +endif() + if(DEFINED PROJECT_NAME) set(SUBPROJECT ON) set(NOT_SUBPROJECT OFF) - if(NOT DEFINED BUILD_TESTING) + if(NOT MDBX_AMALGAMATED_SOURCE AND NOT DEFINED BUILD_TESTING) set(BUILD_TESTING OFF) endif() else() set(SUBPROJECT OFF) set(NOT_SUBPROJECT ON) project(libmdbx C CXX) - if(NOT DEFINED BUILD_TESTING) + if(NOT MDBX_AMALGAMATED_SOURCE AND NOT DEFINED BUILD_TESTING) set(BUILD_TESTING ON) endif() endif() @@ -72,17 +98,19 @@ if(NOT CMAKE_BUILD_TYPE) FORCE) endif() -macro(add_mdbx_option NAME DESCRIPTION DEFAULT) - list(APPEND MDBX_BUILD_OPTIONS ${NAME}) - if(NOT ${DEFAULT} STREQUAL "AUTO") - option(${NAME} "${DESCRIPTION}" ${DEFAULT}) - elseif(NOT DEFINED ${NAME}) - set(${NAME}_AUTO ON) - endif() -endmacro() +if(NOT_SUBPROJECT AND (CMAKE_CROSSCOMPILING OR IOS)) + set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY) +endif() -# only for compatibility testing -# set(CMAKE_CXX_STANDARD 14) +if(IOS) + set(MDBX_BUILD_TOOLS_DEFAULT OFF) + if(NOT_SUBPROJECT) + cmake_policy(SET CMP0006 OLD) + set(CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED "NO") + endif() +else() + set(MDBX_BUILD_TOOLS_DEFAULT ON) +endif() if(NOT "$ENV{TEAMCITY_PROCESS_FLOW_ID}" STREQUAL "") set(CI TEAMCITY) @@ -113,19 +141,8 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${MDBX_OUTPUT_DIR}) set(CMAKE_PDB_OUTPUT_DIRECTORY ${MDBX_OUTPUT_DIR}) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${MDBX_OUTPUT_DIR}) -include(CheckLibraryExists) -include(CheckIncludeFiles) -include(CheckCCompilerFlag) -include(CheckSymbolExists) -include(CheckCSourceRuns) -include(CheckCXXSourceRuns) -include(CheckCSourceCompiles) -include(CheckCXXSourceCompiles) -include(TestBigEndian) include(CheckFunctionExists) include(FindPackageMessage) -include(CheckStructHasMember) -include(CMakeDependentOption) include(GNUInstallDirs) if(CMAKE_C_COMPILER_ID STREQUAL "MSVC" AND MSVC_VERSION LESS 1900) @@ -145,15 +162,6 @@ include(cmake/utils.cmake) include(cmake/compiler.cmake) include(cmake/profile.cmake) -find_program(ECHO echo) -find_program(CAT cat) -find_program(GIT git) -find_program(LD ld) - -# CHECK_INCLUDE_FILES(unistd.h HAVE_UNISTD_H) -# CHECK_INCLUDE_FILES(sys/uio.h HAVE_SYS_UIO_H) -# CHECK_INCLUDE_FILES(sys/stat.h HAVE_SYS_STAT_H) - CHECK_FUNCTION_EXISTS(pow NOT_NEED_LIBM) if(NOT_NEED_LIBM) set(LIB_MATH "") @@ -222,57 +230,56 @@ else() set(LTO_ENABLED FALSE) endif() - find_program(VALGRIND valgrind) - if(VALGRIND) - # LY: cmake is ugly and nasty. - # - therefore memcheck-options should be defined before including ctest; - # - otherwise ctest may ignore it. - set(MEMORYCHECK_SUPPRESSIONS_FILE - "${PROJECT_SOURCE_DIR}/test/valgrind_suppress.txt" - CACHE FILEPATH "Suppressions file for Valgrind" FORCE) - set(MEMORYCHECK_COMMAND_OPTIONS - "--trace-children=yes --leak-check=full --track-origins=yes --error-exitcode=42 --error-markers=@ --errors-for-leak-kinds=definite --fair-sched=yes --suppressions=${MEMORYCHECK_SUPPRESSIONS_FILE}" - CACHE STRING "Valgrind options" FORCE) - set(VALGRIND_COMMAND_OPTIONS "${MEMORYCHECK_COMMAND_OPTIONS}" CACHE STRING "Valgrind options" FORCE) - endif() + if(NOT MDBX_AMALGAMATED_SOURCE) + find_program(VALGRIND valgrind) + if(VALGRIND) + # LY: cmake is ugly and nasty. + # - therefore memcheck-options should be defined before including ctest; + # - otherwise ctest may ignore it. + set(MEMORYCHECK_SUPPRESSIONS_FILE + "${CMAKE_CURRENT_SOURCE_DIR}/test/valgrind_suppress.txt" + CACHE FILEPATH "Suppressions file for Valgrind" FORCE) + set(MEMORYCHECK_COMMAND_OPTIONS + "--trace-children=yes --leak-check=full --track-origins=yes --error-exitcode=42 --error-markers=@ --errors-for-leak-kinds=definite --fair-sched=yes --suppressions=${MEMORYCHECK_SUPPRESSIONS_FILE}" + CACHE STRING "Valgrind options" FORCE) + set(VALGRIND_COMMAND_OPTIONS "${MEMORYCHECK_COMMAND_OPTIONS}" CACHE STRING "Valgrind options" FORCE) + endif() - # - # Enable 'make tags' target. - find_program(CTAGS ctags) - if(CTAGS) - add_custom_target(tags COMMAND ${CTAGS} -R -f tags - WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}) - add_custom_target(ctags DEPENDS tags) - endif(CTAGS) - - # - # Enable 'make reformat' target. - find_program(CLANG_FORMAT - NAMES clang-format-6.0 clang-format-5.0 clang-format-4.0 - clang-format-3.9 clang-format-3.8 clang-format-3.7 clang-format) - if(CLANG_FORMAT AND UNIX) - add_custom_target(reformat - VERBATIM - COMMAND - git ls-files | - grep -E \\.\(c|cxx|cc|cpp|h|hxx|hpp\)\(\\.in\)?\$ | - xargs ${CLANG_FORMAT} -i --style=file - WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}) - endif() + # Enable 'make tags' target. + find_program(CTAGS ctags) + if(CTAGS) + add_custom_target(tags COMMAND ${CTAGS} -R -f tags + WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + add_custom_target(ctags DEPENDS tags) + endif(CTAGS) + + # Enable 'make reformat' target. + find_program(CLANG_FORMAT + NAMES clang-format-11.0 clang-format-10.0 clang-format-9.0 clang-format-8.0 clang-format) + if(CLANG_FORMAT AND UNIX) + add_custom_target(reformat + VERBATIM + COMMAND + git ls-files | + grep -E \\.\(c|cxx|cc|cpp|h|hxx|hpp\)\(\\.in\)?\$ | + xargs ${CLANG_FORMAT} -i --style=file + WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}) + endif() - if(NOT "${PROJECT_BINARY_DIR}" STREQUAL "${PROJECT_SOURCE_DIR}") - add_custom_target(distclean) - add_custom_command(TARGET distclean - COMMAND ${CMAKE_COMMAND} -E remove_directory "${PROJECT_BINARY_DIR}" - COMMENT "Removing the build directory and its content") - elseif(IS_DIRECTORY .git AND GIT) - add_custom_target(distclean) - add_custom_command(TARGET distclean - WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} - COMMAND ${GIT} submodule foreach --recursive git clean -f -X -d - COMMAND ${GIT} clean -f -X -d - COMMENT "Removing all build files from the source directory") - endif() + if(NOT "${PROJECT_BINARY_DIR}" STREQUAL "${PROJECT_SOURCE_DIR}") + add_custom_target(distclean) + add_custom_command(TARGET distclean + COMMAND ${CMAKE_COMMAND} -E remove_directory "${PROJECT_BINARY_DIR}" + COMMENT "Removing the build directory and its content") + elseif(IS_DIRECTORY .git AND GIT) + add_custom_target(distclean) + add_custom_command(TARGET distclean + WORKING_DIRECTORY ${PROJECT_SOURCE_DIR} + COMMAND ${GIT} submodule foreach --recursive git clean -f -X -d + COMMAND ${GIT} clean -f -X -d + COMMENT "Removing all build files from the source directory") + endif() + endif(NOT MDBX_AMALGAMATED_SOURCE) setup_compile_flags() endif(SUBPROJECT) @@ -285,6 +292,66 @@ else() endif() message(STATUS "Use C${MDBX_C_STANDARD} for libmdbx") +if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows" AND EXISTS "${MDBX_SOURCE_DIR}/ntdll.def") + if(MSVC) + if(NOT MSVC_LIB_EXE) + # Find lib.exe + get_filename_component(CL_NAME ${CMAKE_C_COMPILER} NAME) + string(REPLACE cl.exe lib.exe MSVC_LIB_EXE ${CL_NAME}) + find_program(MSVC_LIB_EXE ${MSVC_LIB_EXE}) + endif() + if(MSVC_LIB_EXE) + message(STATUS "Found MSVC's lib tool: ${MSVC_LIB_EXE}") + set(MDBX_NTDLL_EXTRA_IMPLIB "${CMAKE_CURRENT_BINARY_DIR}/mdbx_ntdll_extra.lib") + add_custom_command(OUTPUT "${MDBX_NTDLL_EXTRA_IMPLIB}" + COMMENT "Create extra-import-library for ntdll.dll" + MAIN_DEPENDENCY "${MDBX_SOURCE_DIR}/ntdll.def" + COMMAND ${MSVC_LIB_EXE} /def:"${MDBX_SOURCE_DIR}/ntdll.def" /out:"${MDBX_NTDLL_EXTRA_IMPLIB}" ${INITIAL_CMAKE_STATIC_LINKER_FLAGS}) + else() + message(WARNING "MSVC's lib tool not found") + endif() + elseif(MINGW OR MINGW64) + if(NOT DLLTOOL) + # Find dlltool + get_filename_component(GCC_NAME ${CMAKE_C_COMPILER} NAME) + string(REPLACE gcc dlltool DLLTOOL_NAME ${GCC_NAME}) + find_program(DLLTOOL NAMES ${DLLTOOL_NAME}) + endif() + if(DLLTOOL) + message(STATUS "Found dlltool: ${DLLTOOL}") + set(MDBX_NTDLL_EXTRA_IMPLIB "${CMAKE_CURRENT_BINARY_DIR}/mdbx_ntdll_extra.a") + add_custom_command(OUTPUT "${MDBX_NTDLL_EXTRA_IMPLIB}" + COMMENT "Create extra-import-library for ntdll.dll" + MAIN_DEPENDENCY "${MDBX_SOURCE_DIR}/ntdll.def" + COMMAND ${DLLTOOL} -d "${MDBX_SOURCE_DIR}/ntdll.def" -l "${MDBX_NTDLL_EXTRA_IMPLIB}") + else() + message(WARNING "dlltool not found") + endif() + endif() + + if(MDBX_NTDLL_EXTRA_IMPLIB) + # LY: Sometimes CMake requires a nightmarish magic for simple things. + # 1) create a target out of the library compilation result + add_custom_target(ntdll_extra_target DEPENDS "${MDBX_NTDLL_EXTRA_IMPLIB}") + # 2) create an library target out of the library compilation result + add_library(ntdll_extra STATIC IMPORTED GLOBAL) + add_dependencies(ntdll_extra ntdll_extra_target) + # 3) specify where the library is (and where to find the headers) + set_target_properties(ntdll_extra + PROPERTIES + IMPORTED_LOCATION "${MDBX_NTDLL_EXTRA_IMPLIB}") + endif() +endif() + +macro(add_mdbx_option NAME DESCRIPTION DEFAULT) + list(APPEND MDBX_BUILD_OPTIONS ${NAME}) + if(NOT ${DEFAULT} STREQUAL "AUTO") + option(${NAME} "${DESCRIPTION}" ${DEFAULT}) + elseif(NOT DEFINED ${NAME}) + set(${NAME}_AUTO ON) + endif() +endmacro() + ################################################################################ ################################################################################ # @@ -297,42 +364,400 @@ message(STATUS "Use C${MDBX_C_STANDARD} for libmdbx") # set(MDBX_BUILD_OPTIONS ENABLE_ASAN MDBX_USE_VALGRIND ENABLE_GPROF ENABLE_GCOV) +add_mdbx_option(MDBX_INSTALL_STATIC "Build and install libmdbx for static linking" OFF) add_mdbx_option(MDBX_BUILD_SHARED_LIBRARY "Build libmdbx as shared library (DLL)" ${BUILD_SHARED_LIBS}) -add_mdbx_option(MDBX_ALLOY_BUILD "Build MDBX library as single object file" ON) +add_mdbx_option(MDBX_BUILD_TOOLS "Build MDBX tools (mdbx_chk/stat/dump/load/copy)" ${MDBX_BUILD_TOOLS_DEFAULT}) add_mdbx_option(MDBX_TXN_CHECKOWNER "Checking transaction matches the calling thread inside libmdbx's API" ON) add_mdbx_option(MDBX_TXN_CHECKPID "Paranoid checking PID inside libmdbx's API" AUTO) mark_as_advanced(MDBX_TXN_CHECKPID) if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux") - add_mdbx_option(MDBX_DISABLE_GNU_SOURCE "Don't use nonstandard GNU/Linux extension functions" OFF) + add_mdbx_option(MDBX_DISABLE_GNU_SOURCE "Don't use GNU/Linux libc extensions" OFF) mark_as_advanced(MDBX_DISABLE_GNU_SOURCE) endif() -if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin") +if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin" OR IOS) add_mdbx_option(MDBX_OSX_SPEED_INSTEADOF_DURABILITY "Disable use fcntl(F_FULLFSYNC) in favor of speed" OFF) mark_as_advanced(MDBX_OSX_SPEED_INSTEADOF_DURABILITY) endif() if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") - add_mdbx_option(MDBX_AVOID_CRT "Avoid dependence from MSVC CRT" ${NOT_SUBPROJECT}) - if(NOT MDBX_BUILD_SHARED_LIBRARY) - add_mdbx_option(MDBX_CONFIG_MANUAL_TLS_CALLBACK - "Provide mdbx_dll_handler() for manual initialization" OFF) - mark_as_advanced(MDBX_CONFIG_MANUAL_TLS_CALLBACK) + if(MDBX_NTDLL_EXTRA_IMPLIB) + add_mdbx_option(MDBX_AVOID_CRT "Avoid dependence from MSVC CRT and use ntdll.dll instead" ${NOT_SUBPROJECT}) endif() + add_mdbx_option(MDBX_CONFIG_MANUAL_TLS_CALLBACK + "Provide mdbx_dll_handler() for manual initialization" OFF) + mark_as_advanced(MDBX_CONFIG_MANUAL_TLS_CALLBACK) else() add_mdbx_option(MDBX_USE_OFDLOCKS "Use Open file description locks (aka OFD locks, non-POSIX)" AUTO) mark_as_advanced(MDBX_USE_OFDLOCKS) endif() add_mdbx_option(MDBX_LOCKING "Locking method (Win32=-1, SysV=5, POSIX=1988, POSIX=2001, POSIX=2008, Futexes=1995)" AUTO) mark_as_advanced(MDBX_LOCKING) -add_mdbx_option(MDBX_TRUST_RTC "Does a system have battery-backed Real-Time Clock or just a fake." AUTO) +add_mdbx_option(MDBX_TRUST_RTC "Does a system have battery-backed Real-Time Clock or just a fake" AUTO) mark_as_advanced(MDBX_TRUST_RTC) -option(MDBX_ENABLE_TESTS "Build MDBX tests." ${BUILD_TESTING}) -option(MDBX_FORCE_ASSERTIONS "Force enable assertion checking." OFF) +option(MDBX_FORCE_ASSERTIONS "Force enable assertion checking" OFF) + +if(NOT MDBX_AMALGAMATED_SOURCE) + add_mdbx_option(MDBX_ALLOY_BUILD "Build MDBX library through single/alloyed object file" ON) + option(MDBX_ENABLE_TESTS "Build MDBX tests" ${BUILD_TESTING}) +endif(NOT MDBX_AMALGAMATED_SOURCE) + +if((MDBX_BUILD_TOOLS OR MDBX_ENABLE_TESTS) AND MDBX_BUILD_SHARED_LIBRARY) + add_mdbx_option(MDBX_LINK_TOOLS_NONSTATIC "Link MDBX tools with non-static libmdbx" OFF) +else() + unset(MDBX_LINK_TOOLS_NONSTATIC CACHE) +endif() ################################################################################ ################################################################################ -add_subdirectory(src) -if(MDBX_ENABLE_TESTS) +# Get version +fetch_version(MDBX "${CMAKE_CURRENT_SOURCE_DIR}/VERSION" FALSE) +message(STATUS "libmdbx version is ${MDBX_VERSION}") + +# sources list +set(LIBMDBX_SOURCES mdbx.h "${CMAKE_CURRENT_BINARY_DIR}/config.h") +if(MDBX_AMALGAMATED_SOURCE) + list(APPEND LIBMDBX_SOURCES mdbx.c) +else() + # generate version file + configure_file("${MDBX_SOURCE_DIR}/version.c.in" + "${CMAKE_CURRENT_BINARY_DIR}/version.c" ESCAPE_QUOTES) + file(SHA256 "${CMAKE_CURRENT_BINARY_DIR}/version.c" MDBX_SOURCERY_DIGEST) + string(MAKE_C_IDENTIFIER "${MDBX_GIT_DESCRIBE}" MDBX_SOURCERY_SUFFIX) + set(MDBX_BUILD_SOURCERY "${MDBX_SOURCERY_DIGEST}_${MDBX_SOURCERY_SUFFIX}") + + if(MDBX_ALLOY_BUILD) + list(APPEND LIBMDBX_SOURCES ${MDBX_SOURCE_DIR}/alloy.c) + include_directories("${MDBX_SOURCE_DIR}" "${CMAKE_CURRENT_BINARY_DIR}") + else() + list(APPEND LIBMDBX_SOURCES + "${CMAKE_CURRENT_BINARY_DIR}/version.c" + "${MDBX_SOURCE_DIR}/options.h" "${MDBX_SOURCE_DIR}/defs.h" + "${MDBX_SOURCE_DIR}/internals.h" "${MDBX_SOURCE_DIR}/osal.h" + "${MDBX_SOURCE_DIR}/core.c" "${MDBX_SOURCE_DIR}/osal.c" + "${MDBX_SOURCE_DIR}/lck-posix.c" "${MDBX_SOURCE_DIR}/lck-windows.c") + include_directories("${MDBX_SOURCE_DIR}") + endif() +endif(MDBX_AMALGAMATED_SOURCE) + +macro(target_setup_options TARGET) + if(DEFINED INTERPROCEDURAL_OPTIMIZATION) + set_target_properties(${TARGET} PROPERTIES + INTERPROCEDURAL_OPTIMIZATION $) + endif() + if(CC_HAS_FASTMATH) + target_compile_options(${TARGET} PRIVATE "-ffast-math") + endif() + if(CC_HAS_VISIBILITY) + target_compile_options(${TARGET} PRIVATE "-fvisibility=hidden") + endif() + if(BUILD_FOR_NATIVE_CPU AND CC_HAS_ARCH_NATIVE) + target_compile_options(${TARGET} PUBLIC "-march=native") + endif() +endmacro() + +macro(libmdbx_setup_libs TARGET MODE) + target_link_libraries(${TARGET} ${MODE} ${CMAKE_THREAD_LIBS_INIT}) + if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") + target_link_libraries(${TARGET} ${MODE} ntdll.lib) + if(MDBX_NTDLL_EXTRA_IMPLIB) + target_link_libraries(${TARGET} ${MODE} ntdll_extra) + endif() + elseif(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS" OR ${CMAKE_SYSTEM_NAME} STREQUAL "Solaris") + target_link_libraries(${TARGET} ${MODE} kstat) + elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Android") + target_link_libraries(${TARGET} ${MODE} log) + endif() +endmacro() + +# build static library +if(MDBX_INSTALL_STATIC) + add_library(mdbx-static STATIC ${LIBMDBX_SOURCES}) +else() + add_library(mdbx-static STATIC EXCLUDE_FROM_ALL ${LIBMDBX_SOURCES}) +endif() +set_target_properties(mdbx-static PROPERTIES + C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON + PUBLIC_HEADER mdbx.h) +target_compile_definitions(mdbx-static PRIVATE MDBX_BUILD_SHARED_LIBRARY=0) +target_setup_options(mdbx-static) +libmdbx_setup_libs(mdbx-static INTERFACE) +if(MDBX_BUILD_SHARED_LIBRARY) + set_target_properties(mdbx-static PROPERTIES OUTPUT_NAME mdbx-static) +else() + set_target_properties(mdbx-static PROPERTIES OUTPUT_NAME mdbx) +endif() + +################################################################################ + +# build shared library +if(MDBX_BUILD_SHARED_LIBRARY) + add_library(mdbx SHARED ${LIBMDBX_SOURCES}) + set_target_properties(mdbx PROPERTIES + C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON + PUBLIC_HEADER mdbx.h) + target_compile_definitions(mdbx PRIVATE LIBMDBX_EXPORTS MDBX_BUILD_SHARED_LIBRARY=1 INTERFACE LIBMDBX_IMPORTS) + target_setup_options(mdbx) + libmdbx_setup_libs(mdbx PRIVATE) + if(CC_HAS_VISIBILITY AND (LTO_ENABLED OR INTERPROCEDURAL_OPTIMIZATION)) + set_target_properties(mdbx PROPERTIES LINK_FLAGS "-fvisibility=hidden") + endif() + list(APPEND MDBX_BUILD_FLAGS ${CMAKE_SHARED_LINKER_FLAGS}) +endif() + +if(MDBX_BUILD_SHARED_LIBRARY AND MDBX_LINK_TOOLS_NONSTATIC) + set(TOOL_MDBX_LIB mdbx) + + # use, i.e. don't skip the full RPATH for the build tree + set(CMAKE_SKIP_BUILD_RPATH FALSE) + + # when building, don't use the install RPATH already (but later on when installing) + set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE) + + # add the automatically determined parts of the RPATH + # which point to directories outside the build tree to the install RPATH + set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE) + + # the RPATH to be used when installing, but only if it's not a system directory + list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir) + if(isSystemDir EQUAL -1) + if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin") + set(CMAKE_INSTALL_RPATH "@executable_path/../lib") + else() + set(CMAKE_INSTALL_RPATH "\$ORIGIN/../lib") + endif() + endif() +else() + set(TOOL_MDBX_LIB mdbx-static) +endif() + +# build mdbx-tools +if(MDBX_BUILD_TOOLS) + if(NOT MDBX_AMALGAMATED_SOURCE AND ${CMAKE_SYSTEM_NAME} STREQUAL "Windows") + set(WINGETOPT_SRC ${MDBX_SOURCE_DIR}/wingetopt.c ${MDBX_SOURCE_DIR}/wingetopt.h) + else() + set(WINGETOPT_SRC "") + endif() + + foreach(TOOL mdbx_chk mdbx_copy mdbx_stat mdbx_dump mdbx_load) + add_executable(${TOOL} mdbx.h ${MDBX_SOURCE_DIR}/${TOOL}.c ${WINGETOPT_SRC}) + set_target_properties(${TOOL} PROPERTIES + C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON) + target_setup_options(${TOOL}) + target_link_libraries(${TOOL} ${TOOL_MDBX_LIB}) + endforeach() + if(LIB_MATH) + target_link_libraries(mdbx_chk ${LIB_MATH}) + target_link_libraries(mdbx_stat ${LIB_MATH}) + endif() +endif() + +################################################################################ + +# mdbx-shared-lib installation +if(MDBX_BUILD_SHARED_LIBRARY) + if(CMAKE_VERSION VERSION_LESS 3.12) + install(TARGETS mdbx EXPORT libmdbx + RUNTIME + DESTINATION bin + COMPONENT runtime + LIBRARY + DESTINATION lib + COMPONENT runtime + OBJECTS + DESTINATION lib + COMPONENT devel + ARCHIVE + DESTINATION lib + COMPONENT devel + PUBLIC_HEADER + DESTINATION include + COMPONENT devel + INCLUDES + DESTINATION include + COMPONENT devel) + else() + install(TARGETS mdbx EXPORT libmdbx + RUNTIME + DESTINATION bin + COMPONENT runtime + LIBRARY + DESTINATION lib + COMPONENT runtime + NAMELINK_COMPONENT devel + OBJECTS + DESTINATION lib + COMPONENT devel + ARCHIVE + DESTINATION lib + COMPONENT devel + PUBLIC_HEADER + DESTINATION include + COMPONENT devel + INCLUDES + DESTINATION include + COMPONENT devel) + endif() +endif(MDBX_BUILD_SHARED_LIBRARY) + +# mdbx-tools installation +if(MDBX_BUILD_TOOLS) + install( + TARGETS + mdbx_chk + mdbx_stat + mdbx_copy + mdbx_dump + mdbx_load + RUNTIME + DESTINATION bin + COMPONENT runtime) + install( + FILES + "${MDBX_SOURCE_DIR}/man1/mdbx_chk.1" + "${MDBX_SOURCE_DIR}/man1/mdbx_stat.1" + "${MDBX_SOURCE_DIR}/man1/mdbx_copy.1" + "${MDBX_SOURCE_DIR}/man1/mdbx_dump.1" + "${MDBX_SOURCE_DIR}/man1/mdbx_load.1" + DESTINATION man/man1 + COMPONENT doc) +endif(MDBX_BUILD_TOOLS) + +# mdbx-static-lib installation +if(MDBX_INSTALL_STATIC) + if(CMAKE_VERSION VERSION_LESS 3.12) + install(TARGETS mdbx-static EXPORT libmdbx + RUNTIME + DESTINATION bin + COMPONENT runtime + LIBRARY + DESTINATION lib + COMPONENT runtime + OBJECTS + DESTINATION lib + COMPONENT devel + ARCHIVE + DESTINATION lib + COMPONENT devel + PUBLIC_HEADER + DESTINATION include + COMPONENT devel + INCLUDES + DESTINATION include + COMPONENT devel) + else() + install(TARGETS mdbx-static EXPORT libmdbx + RUNTIME + DESTINATION bin + COMPONENT runtime + LIBRARY + DESTINATION lib + COMPONENT runtime + NAMELINK_COMPONENT devel + OBJECTS + DESTINATION lib + COMPONENT devel + ARCHIVE + DESTINATION lib + COMPONENT devel + PUBLIC_HEADER + DESTINATION include + COMPONENT devel + INCLUDES + DESTINATION include + COMPONENT devel) + endif() +endif(MDBX_INSTALL_STATIC) + +################################################################################ + +# collect options & build info +string(TIMESTAMP MDBX_BUILD_TIMESTAMP UTC) +set(MDBX_BUILD_FLAGS ${CMAKE_C_FLAGS}) + +# append cmake's build-type flags and defines +if(NOT CMAKE_CONFIGURATION_TYPES) + list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}) +endif() + +# get definitions +get_target_property(defs_list mdbx-static COMPILE_DEFINITIONS) +if(defs_list) + list(APPEND MDBX_BUILD_FLAGS ${defs_list}) +endif() + +# get target compile options +get_target_property(options_list mdbx-static COMPILE_OPTIONS) +if(options_list) + list(APPEND MDBX_BUILD_FLAGS ${options_list}) +endif() + +list(REMOVE_DUPLICATES MDBX_BUILD_FLAGS) +string(REPLACE ";" " " MDBX_BUILD_FLAGS "${MDBX_BUILD_FLAGS}") +if(CMAKE_CONFIGURATION_TYPES) + # add dynamic part via per-configuration define + message(STATUS "MDBX Compile Flags: ${MDBX_BUILD_FLAGS} ") + add_definitions(-DMDBX_BUILD_FLAGS_CONFIG="$<$:${CMAKE_C_FLAGS_DEBUG} ${CMAKE_C_DEFINES_DEBUG}>$<$:${CMAKE_C_FLAGS_RELEASE} ${CMAKE_C_DEFINES_RELEASE}>$<$:${CMAKE_C_FLAGS_RELWITHDEBINFO} ${CMAKE_C_DEFINES_RELWITHDEBINFO}>$<$:${CMAKE_C_FLAGS_MINSIZEREL} ${CMAKE_C_DEFINES_MINSIZEREL}>") +else() + message(STATUS "MDBX Compile Flags: ${MDBX_BUILD_FLAGS}") +endif() + +# get compiler info +execute_process(COMMAND sh -c "${CMAKE_C_COMPILER} --version | head -1" + OUTPUT_VARIABLE MDBX_BUILD_COMPILER + OUTPUT_STRIP_TRAILING_WHITESPACE + ERROR_QUIET + RESULT_VARIABLE rc) +if(rc OR NOT MDBX_BUILD_COMPILER) + string(STRIP "${CMAKE_C_COMPILER_ID}-${CMAKE_C_COMPILER_VERSION}" MDBX_BUILD_COMPILER) +endif() + +# make a build-target triplet +if(CMAKE_C_COMPILER_TARGET) + set(MDBX_BUILD_TARGET "${CMAKE_C_COMPILER_TARGET}") +elseif(CMAKE_C_PLATFORM_ID AND NOT CMAKE_C_PLATFORM_ID STREQUAL CMAKE_SYSTEM_NAME) + string(STRIP "${CMAKE_C_PLATFORM_ID}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) +elseif(CMAKE_LIBRARY_ARCHITECTURE) + string(STRIP "${CMAKE_LIBRARY_ARCHITECTURE}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) +elseif(CMAKE_GENERATOR_PLATFORM AND NOT CMAKE_C_PLATFORM_ID STREQUAL CMAKE_SYSTEM_NAME) + string(STRIP "${CMAKE_GENERATOR_PLATFORM}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) +elseif(CMAKE_SYSTEM_ARCH) + string(STRIP "${CMAKE_SYSTEM_ARCH}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) +else() + string(STRIP "${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) +endif() + +# provide build-type +if(CMAKE_CONFIGURATION_TYPES) + add_definitions(-DMDBX_BUILD_TYPE="$") +else() + set(MDBX_BUILD_TYPE ${CMAKE_BUILD_TYPE}) +endif() + +# options +set(options VERSION C_COMPILER CXX_COMPILER) +foreach(item IN LISTS options) + if(DEFINED ${item}) + set(value "${${item}}") + elseif(DEFINED MDBX_${item}) + set(item MDBX_${item}) + set(value "${${item}}") + elseif(DEFINED CMAKE_${item}) + set(item CMAKE_${item}) + set(value "${${item}}") + else() + set(value "undefined") + endif() + message(STATUS "${item}: ${value}") +endforeach(item) + +# provide config.h for library build info +configure_file("${MDBX_SOURCE_DIR}/config.h.in" + "${CMAKE_CURRENT_BINARY_DIR}/config.h" ESCAPE_QUOTES) +add_definitions(-DMDBX_CONFIG_H="${CMAKE_CURRENT_BINARY_DIR}/config.h") + +################################################################################ + +if(NOT MDBX_AMALGAMATED_SOURCE AND MDBX_ENABLE_TESTS) add_subdirectory(test) endif() diff --git a/libs/libmdbx/src/GNUmakefile b/libs/libmdbx/src/GNUmakefile index 5d9d25b9bf..6aeb1f92ee 100644 --- a/libs/libmdbx/src/GNUmakefile +++ b/libs/libmdbx/src/GNUmakefile @@ -9,7 +9,7 @@ SHELL := env bash # install sandbox -SANDBOX ?= +DESTDIR ?= # install prefixes (inside sandbox) prefix ?= /usr/local @@ -19,9 +19,10 @@ mandir ?= $(prefix)/man suffix ?= CC ?= gcc +CFLAGS_EXTRA ?= LD ?= ld MDBX_OPTIONS ?= -DNDEBUG=1 -CFLAGS ?= -O2 -g -Wall -Werror -Wextra -Wpedantic -ffunction-sections -fPIC -fvisibility=hidden -std=gnu11 -pthread -Wno-error=attributes +CFLAGS ?= -O2 -g -Wall -Werror -Wextra -Wpedantic -ffunction-sections -fPIC -fvisibility=hidden -std=gnu11 -pthread -Wno-error=attributes $(CFLAGS_EXTRA) # -Wno-tautological-compare # HINT: Try append '--no-as-needed,-lrt' for ability to built with modern glibc, but then run with the old. @@ -61,7 +62,7 @@ strip: all clean: rm -rf $(TOOLS) mdbx_test @* *.[ao] *.[ls]o *~ tmp.db/* \ *.gcov *.log *.err src/*.o test/*.o mdbx_example dist \ - config.h src/elements/config.h src/elements/version.c *.tar* + config.h src/config.h src/version.c *.tar* libmdbx.a: mdbx-static.o $(AR) rs $@ $? @@ -112,7 +113,8 @@ define uname2titer esac endef -DIST_EXTRA := LICENSE README.md CMakeLists.txt GNUmakefile Makefile $(addprefix man1/, $(MANPAGES)) +DIST_EXTRA := LICENSE README.md CMakeLists.txt GNUmakefile Makefile VERSION config.h.in \ + $(addprefix man1/, $(MANPAGES)) cmake/compiler.cmake cmake/profile.cmake cmake/utils.cmake DIST_SRC := mdbx.h mdbx.c $(addsuffix .c, $(TOOLS)) TEST_DB ?= $(shell [ -d /dev/shm ] && echo /dev/shm || echo /tmp)/mdbx-test.db @@ -125,14 +127,16 @@ TEST_OBJ := $(patsubst %.cc,%.o,$(TEST_SRC)) CXX ?= g++ CXXSTD ?= $(shell $(CXX) -std=c++27 -c test/test.cc -o /dev/null 2>/dev/null && echo -std=c++17 || echo -std=c++11) CXXFLAGS := $(CXXSTD) $(filter-out -std=gnu11,$(CFLAGS)) +TAR ?= $(shell which gnu-tar || echo tar) MAN_SRCDIR := src/man1/ -ALLOY_DEPS := $(wildcard src/elements/*) +ALLOY_DEPS := $(wildcard src/*) MDBX_VERSION_GIT = ${shell set -o pipefail; git describe --tags | sed -n 's|^v*\([0-9]\{1,\}\.[0-9]\{1,\}\.[0-9]\{1,\}\)\(.*\)|\1|p' || echo 'Please fetch tags and/or install latest git version'} +MDBX_REVISION_GIT = $(shell git rev-list --count --no-merges HEAD || echo 'Please fetch tags and/or install latest git version') MDBX_GIT_TIMESTAMP = $(shell git show --no-patch --format=%cI HEAD || echo 'Please install latest get version') MDBX_GIT_DESCRIBE = $(shell git describe --tags --long --dirty=-dirty || echo 'Please fetch tags and/or install latest git version') MDBX_VERSION_SUFFIX = $(shell set -o pipefail; echo -n '$(MDBX_GIT_DESCRIBE)' | tr -c -s '[a-zA-Z0-9]' _) -MDBX_BUILD_SOURCERY = $(shell set -o pipefail; $(MAKE) -s src/elements/version.c && (openssl dgst -r -sha256 src/elements/version.c || sha256sum src/elements/version.c || shasum -a 256 src/elements/version.c) 2>/dev/null | cut -d ' ' -f 1 || echo 'Please install openssl or sha256sum or shasum')_$(MDBX_VERSION_SUFFIX) +MDBX_BUILD_SOURCERY = $(shell set -o pipefail; $(MAKE) -s src/version.c && (openssl dgst -r -sha256 src/version.c || sha256sum src/version.c || shasum -a 256 src/version.c) 2>/dev/null | cut -d ' ' -f 1 || echo 'Please install openssl or sha256sum or shasum')_$(MDBX_VERSION_SUFFIX) check: test mdbx_example dist @@ -175,7 +179,7 @@ $(patsubst %.cc,%.o,$(1)): $(1) $(TEST_INC) mdbx.h $(lastword $(MAKEFILE_LIST)) endef $(foreach file,$(TEST_SRC),$(eval $(call test-rule,$(file)))) -mdbx_%: src/tools/mdbx_%.c libmdbx.a +mdbx_%: src/mdbx_%.c libmdbx.a $(CC) $(CFLAGS) $(MDBX_OPTIONS) '-DMDBX_CONFIG_H="config.h"' $^ $(EXE_LDFLAGS) $(LIBS) -o $@ mdbx_test: $(TEST_OBJ) libmdbx.$(SO_SUFFIX) @@ -183,7 +187,7 @@ mdbx_test: $(TEST_OBJ) libmdbx.$(SO_SUFFIX) git_DIR := $(shell if [ -d .git ]; then echo .git; elif [ -s .git -a -f .git ]; then grep '^gitdir: ' .git | cut -d ':' -f 2; else echo "Please use libmdbx as a git-submodule or the amalgamated source code" >&2 && echo git_directory; fi) -src/elements/version.c: src/elements/version.c.in $(lastword $(MAKEFILE_LIST)) $(git_DIR)/HEAD $(git_DIR)/index $(git_DIR)/refs/tags +src/version.c: src/version.c.in $(lastword $(MAKEFILE_LIST)) $(git_DIR)/HEAD $(git_DIR)/index $(git_DIR)/refs/tags sed \ -e "s|@MDBX_GIT_TIMESTAMP@|$(MDBX_GIT_TIMESTAMP)|" \ -e "s|@MDBX_GIT_TREE@|$(shell git show --no-patch --format=%T HEAD || echo 'Please install latest get version')|" \ @@ -192,10 +196,10 @@ src/elements/version.c: src/elements/version.c.in $(lastword $(MAKEFILE_LIST)) $ -e "s|\$${MDBX_VERSION_MAJOR}|$(shell echo '$(MDBX_VERSION_GIT)' | cut -d . -f 1)|" \ -e "s|\$${MDBX_VERSION_MINOR}|$(shell echo '$(MDBX_VERSION_GIT)' | cut -d . -f 2)|" \ -e "s|\$${MDBX_VERSION_RELEASE}|$(shell echo '$(MDBX_VERSION_GIT)' | cut -d . -f 3)|" \ - -e "s|\$${MDBX_VERSION_REVISION}|$(shell git rev-list --count --no-merges HEAD || echo 'Please fetch tags and/or install latest git version')|" \ - src/elements/version.c.in > $@ + -e "s|\$${MDBX_VERSION_REVISION}|$(MDBX_REVISION_GIT)|" \ + src/version.c.in > $@ -src/elements/config.h: src/elements/version.c $(lastword $(MAKEFILE_LIST)) +src/config.h: src/version.c $(lastword $(MAKEFILE_LIST)) (echo '#define MDBX_BUILD_TIMESTAMP "$(shell date +%Y-%m-%dT%H:%M:%S%z)"' \ && echo '#define MDBX_BUILD_FLAGS "$(CFLAGS) $(LDFLAGS) $(LIBS)"' \ && echo '#define MDBX_BUILD_COMPILER "$(shell set -o pipefail; $(CC) --version | head -1 || echo 'Please use GCC or CLANG compatible compiler')"' \ @@ -203,63 +207,65 @@ src/elements/config.h: src/elements/version.c $(lastword $(MAKEFILE_LIST)) && echo '#define MDBX_BUILD_SOURCERY $(MDBX_BUILD_SOURCERY)' \ ) > $@ -mdbx-dylib.o: src/elements/config.h src/elements/version.c src/alloy.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST)) +mdbx-dylib.o: src/config.h src/version.c src/alloy.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST)) $(CC) $(CFLAGS) $(MDBX_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -DLIBMDBX_EXPORTS=1 -c src/alloy.c -o $@ -mdbx-static.o: src/elements/config.h src/elements/version.c src/alloy.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST)) +mdbx-static.o: src/config.h src/version.c src/alloy.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST)) $(CC) $(CFLAGS) $(MDBX_OPTIONS) '-DMDBX_CONFIG_H="config.h"' -ULIBMDBX_EXPORTS -c src/alloy.c -o $@ .PHONY: dist dist: libmdbx-sources-$(MDBX_VERSION_SUFFIX).tar.gz $(lastword $(MAKEFILE_LIST)) libmdbx-sources-$(MDBX_VERSION_SUFFIX).tar.gz: $(addprefix dist/, $(DIST_SRC) $(DIST_EXTRA)) $(addprefix dist/man1/,$(MANPAGES)) - tar -c --owner=0 --group=0 -C dist $(DIST_SRC) $(DIST_EXTRA) -f - | gzip -c > $@ \ + $(TAR) -c $(shell LC_ALL=C $(TAR) --help | grep -q -- '--owner' && echo '--owner=0 --group=0') -f - -C dist $(DIST_SRC) $(DIST_EXTRA) | gzip -c > $@ \ && rm dist/@tmp-shared_internals.inc -dist/mdbx.h: mdbx.h src/elements/version.c $(lastword $(MAKEFILE_LIST)) +dist/mdbx.h: mdbx.h src/version.c $(lastword $(MAKEFILE_LIST)) mkdir -p dist && cp $< $@ -dist/Makefile: Makefile - mkdir -p dist && cp $< $@ - -dist/GNUmakefile: GNUmakefile - mkdir -p dist && sed -e '/^#> dist-cutoff-begin/,/^#< dist-cutoff-end/d' $< > $@ - -dist/@tmp-shared_internals.inc: src/elements/version.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST)) +dist/@tmp-shared_internals.inc: src/version.c $(ALLOY_DEPS) $(lastword $(MAKEFILE_LIST)) mkdir -p dist && sed \ -e 's|#pragma once|#define MDBX_ALLOY 1\n#define MDBX_BUILD_SOURCERY $(MDBX_BUILD_SOURCERY)|' \ - -e 's|#include "../../mdbx.h"|@INCLUDE "mdbx.h"|' \ - -e '/#include "defs.h"/r src/elements/defs.h' \ - -e '/#include "osal.h"/r src/elements/osal.h' \ - -e '/#include "options.h"/r src/elements/options.h' \ - src/elements/internals.h > $@ + -e 's|#include "../mdbx.h"|@INCLUDE "mdbx.h"|' \ + -e '/#include "defs.h"/r src/defs.h' \ + -e '/#include "osal.h"/r src/osal.h' \ + -e '/#include "options.h"/r src/options.h' \ + src/internals.h > $@ dist/mdbx.c: dist/@tmp-shared_internals.inc $(lastword $(MAKEFILE_LIST)) mkdir -p dist && (cat dist/@tmp-shared_internals.inc \ - && cat src/elements/core.c src/elements/osal.c src/elements/version.c src/elements/lck-windows.c src/elements/lck-posix.c \ + && cat src/core.c src/osal.c src/version.c src/lck-windows.c src/lck-posix.c \ ) | grep -v -e '#include "' -e '#pragma once' | sed 's|@INCLUDE|#include|' > $@ define dist-tool-rule -dist/$(1).c: src/tools/$(1).c src/tools/wingetopt.h src/tools/wingetopt.c \ +dist/$(1).c: src/$(1).c src/wingetopt.h src/wingetopt.c \ dist/@tmp-shared_internals.inc $(lastword $(MAKEFILE_LIST)) mkdir -p dist && sed \ - -e '/#include "..\/elements\/internals.h"/r dist/@tmp-shared_internals.inc' \ - -e '/#include "wingetopt.h"/r src/tools/wingetopt.c' \ - src/tools/$(1).c \ + -e '/#include "internals.h"/r dist/@tmp-shared_internals.inc' \ + -e '/#include "wingetopt.h"/r src/wingetopt.c' \ + src/$(1).c \ | grep -v -e '#include "' -e '#pragma once' -e '#define MDBX_ALLOY' \ | sed 's|@INCLUDE|#include|' > $$@ endef $(foreach file,$(TOOLS),$(eval $(call dist-tool-rule,$(file)))) +define dist-extra-rule +dist/$(1): $(1) + mkdir -p $$(dir $$@) && sed -e '/^#> dist-cutoff-begin/,/^#< dist-cutoff-end/d' $$< > $$@ + +endef +$(foreach file,$(filter-out man1/% VERSION %.in,$(DIST_EXTRA)),$(eval $(call dist-extra-rule,$(file)))) + +dist/VERSION: src/version.c + mkdir -p dist/ && echo "$(MDBX_VERSION_GIT).$(MDBX_REVISION_GIT)" > $@ + +dist/config.h.in: src/config.h.in + mkdir -p dist/cmake/ && cp $< $@ + dist/man1/mdbx_%.1: src/man1/mdbx_%.1 mkdir -p dist/man1/ && cp $< $@ -dist/LICENSE: LICENSE - mkdir -p dist/man1/ && cp $< $@ -dist/README.md: README.md - mkdir -p dist/man1/ && cp $< $@ -dist/CMakeLists.txt: CMakeLists.dist-minimal - mkdir -p dist/man1/ && cp $< $@ + endif ################################################################################ @@ -302,14 +308,17 @@ cross-qemu: #< dist-cutoff-end install: $(LIBRARIES) $(TOOLS) $(HEADERS) - mkdir -p $(SANDBOX)$(prefix)/bin$(suffix) \ - && cp -t $(SANDBOX)$(prefix)/bin$(suffix) $(TOOLS) && \ - mkdir -p $(SANDBOX)$(prefix)/lib$(suffix) \ - && cp -t $(SANDBOX)$(prefix)/lib$(suffix) $(LIBRARIES) && \ - mkdir -p $(SANDBOX)$(prefix)/include \ - && cp -t $(SANDBOX)$(prefix)/include $(HEADERS) && \ - mkdir -p $(SANDBOX)$(mandir)/man1 \ - && cp -t $(SANDBOX)$(mandir)/man1 $(addprefix $(MAN_SRCDIR), $(MANPAGES)) + install -D -p -s -t $(DESTDIR)$(prefix)/bin$(suffix) $(TOOLS) && \ + install -D -p -s -t $(DESTDIR)$(prefix)/lib$(suffix) $(filter-out libmdbx.a,$(LIBRARIES)) && \ + install -D -p -t $(DESTDIR)$(prefix)/lib$(suffix) libmdbx.a && \ + install -D -p -m 444 -t $(DESTDIR)$(prefix)/include $(HEADERS) && \ + install -D -p -m 444 -t $(DESTDIR)$(mandir)/man1 $(addprefix $(MAN_SRCDIR), $(MANPAGES)) + +uninstall: + rm -f $(addprefix $(DESTDIR)$(prefix)/bin$(suffix)/,$(TOOLS)) \ + $(addprefix $(DESTDIR)$(prefix)/lib$(suffix)/,$(LIBRARIES)) \ + $(addprefix $(DESTDIR)$(prefix)/include/,$(HEADERS)) \ + $(addprefix $(DESTDIR)$(mandir)/man1/,$(MANPAGES)) ################################################################################ # Benchmarking by ioarena diff --git a/libs/libmdbx/src/README.md b/libs/libmdbx/src/README.md index 4cbea049c2..9685648bb4 100644 --- a/libs/libmdbx/src/README.md +++ b/libs/libmdbx/src/README.md @@ -9,15 +9,25 @@ database, with [permissive license](LICENSE). _MDBX_ has a specific set of properties and capabilities, focused on creating unique lightweight solutions with extraordinary performance. -1. Allows **swarm of multi-threaded processes to [ACID]((https://en.wikipedia.org/wiki/ACID))ly read and update** several key-value [maps](https://en.wikipedia.org/wiki/Associative_array) and [multimaps](https://en.wikipedia.org/wiki/Multimap) in a localy-shared database. - -2. Provides **extraordinary performance**, minimal overhead through [Memory-Mapping](https://en.wikipedia.org/wiki/Memory-mapped_file) and `Olog(N)` operations costs by virtue of [B+ tree](https://en.wikipedia.org/wiki/B%2B_tree). - -3. Requires **no maintenance and no crash recovery** since doesn't use [WAL](https://en.wikipedia.org/wiki/Write-ahead_logging), but that might be a caveat for write-intensive workloads. - -4. **Compact and friendly for fully embeddeding**. Only 25KLOC of `C11`, 64K x86 binary code, -no internal threads neither processes, but implements a simplified variant of the -[Berkeley DB](https://en.wikipedia.org/wiki/Berkeley_DB) and +1. Allows **swarm of multi-threaded processes to +[ACID]((https://en.wikipedia.org/wiki/ACID))ly read and update** several +key-value [maps](https://en.wikipedia.org/wiki/Associative_array) and +[multimaps](https://en.wikipedia.org/wiki/Multimap) in a localy-shared +database. + +2. Provides **extraordinary performance**, minimal overhead through +[Memory-Mapping](https://en.wikipedia.org/wiki/Memory-mapped_file) and +`Olog(N)` operations costs by virtue of [B+ +tree](https://en.wikipedia.org/wiki/B%2B_tree). + +3. Requires **no maintenance and no crash recovery** since doesn't use +[WAL](https://en.wikipedia.org/wiki/Write-ahead_logging), but that might +be a caveat for write-intensive workloads with durability requirements. + +4. **Compact and friendly for fully embeddeding**. Only 25KLOC of `C11`, +64K x86 binary code, no internal threads neither processes, but +implements a simplified variant of the [Berkeley +DB](https://en.wikipedia.org/wiki/Berkeley_DB) and [dbm](https://en.wikipedia.org/wiki/DBM_(computing)) API. 5. Enforces [serializability](https://en.wikipedia.org/wiki/Serializability) for @@ -30,7 +40,7 @@ for parallel readers without atomic/interlocked operations, while 6. **Guarantee data integrity** after crash unless this was explicitly neglected in favour of write performance. -7. Supports Linux, Windows, MacOS, FreeBSD, DragonFly, Solaris, +7. Supports Linux, Windows, MacOS, Android, iOS, FreeBSD, DragonFly, Solaris, OpenSolaris, OpenIndiana, NetBSD, OpenBSD and other systems compliant with **POSIX.1-2008**. @@ -49,6 +59,7 @@ _MithrilDB_ is rightly relevant name. > revolution is to provide a clearer and robust API, add more features and > new valuable properties of database. +[![https://t.me/libmdbx](https://raw.githubusercontent.com/wiki/erthink/libmdbx/img/telegram.png)](https://t.me/libmdbx) [![Build Status](https://travis-ci.org/erthink/libmdbx.svg?branch=master)](https://travis-ci.org/erthink/libmdbx) [![Build status](https://ci.appveyor.com/api/projects/status/ue94mlopn50dqiqg/branch/master?svg=true)](https://ci.appveyor.com/project/erthink/libmdbx/branch/master) [![Coverity Scan Status](https://scan.coverity.com/projects/12915/badge.svg)](https://scan.coverity.com/projects/reopen-libmdbx) @@ -185,6 +196,9 @@ the user's point of view. > _libmdbx_ manage the database size according to parameters specified > by `mdbx_env_set_geometry()` function, > ones include the growth step and the truncation threshold. + > + > Unfortunately, on-the-fly database size adjustment doesn't work under [Wine](https://en.wikipedia.org/wiki/Wine_(software)) + > due to its internal limitations and unimplemented functions, i.e. the `MDBX_UNABLE_EXTEND_MAPSIZE` error will be returned. 4. Automatic continuous zero-overhead database compactification. > During each commit _libmdbx_ merges suitable freeing pages into unallocated area @@ -402,16 +416,34 @@ will need to install the current (not outdated) version of recommend that you install [Homebrew](https://brew.sh/) and then execute `brew install bash`. +### Android +We recommend using CMake to build _libmdbx_ for Android. +Please refer to the [official guide](https://developer.android.com/studio/projects/add-native-code). + +### iOS +To build _libmdbx_ for iOS, we recommend using CMake with the +"[toolchain file](https://cmake.org/cmake/help/latest/variable/CMAKE_TOOLCHAIN_FILE.html)" +from the [ios-cmake](https://github.com/leetal/ios-cmake) project. + +### Windows Subsystem for Linux +_libmdbx_ could be using in [WSL2](https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux#WSL_2) +but NOT in [WSL1](https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux#WSL_1) environment. +This is a consequence of the fundamental shortcomings of _WSL1_ and cannot be fixed. +To avoid data loss, _libmdbx_ returns the `ENOLCK` (37, "No record locks available") +error when opening the database in a _WSL1_ environment. + ## API description For more information and API description see the [mdbx.h](mdbx.h) header. +Please do not hesitate to point out errors in the documentation, +including creating [PR](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/proposing-changes-to-your-work-with-pull-requests) with corrections and improvements. ## Bindings | Runtime | GitHub | Author | | -------- | ------ | ------ | + | Rust | [mdbx-rs](https://github.com/Kerollmops/mdbx-rs) | [@Kerollmops](https://github.com/Kerollmops) | | Java | [mdbxjni](https://github.com/castortech/mdbxjni) | [Castor Technologies](https://castortech.com/) | | .NET | [mdbx.NET](https://github.com/wangjia184/mdbx.NET) | [Jerry Wang](https://github.com/wangjia184) | - | Rust | [mdbx-rs](https://github.com/Kerollmops/mdbx-rs) | [Clément Renault](https://github.com/Kerollmops) | -------------------------------------------------------------------------------- diff --git a/libs/libmdbx/src/appveyor.yml b/libs/libmdbx/src/appveyor.yml index c1b1085cd7..efdeae648d 100644 --- a/libs/libmdbx/src/appveyor.yml +++ b/libs/libmdbx/src/appveyor.yml @@ -1,4 +1,4 @@ -version: 0.6.0.{build} +version: 0.7.0.{build} environment: matrix: diff --git a/libs/libmdbx/src/cmake/compiler.cmake b/libs/libmdbx/src/cmake/compiler.cmake index 93c2c9f18b..a3bca1ac29 100644 --- a/libs/libmdbx/src/cmake/compiler.cmake +++ b/libs/libmdbx/src/cmake/compiler.cmake @@ -17,17 +17,15 @@ cmake_minimum_required(VERSION 3.8.2) cmake_policy(PUSH) cmake_policy(VERSION 3.8.2) -if (CMAKE_VERSION MATCHES ".*MSVC.*") +if(CMAKE_VERSION MATCHES ".*MSVC.*" AND CMAKE_VERSION VERSION_LESS 3.16) message(FATAL_ERROR "CMake from MSVC kit is unfit! " - "Please use the original CMake from https://cmake.org/download/") + "Please use MSVC2019 with modern CMake the original CMake from https://cmake.org/download/") endif() -if (NOT (CMAKE_C_COMPILER_LOADED OR CMAKE_CXX_COMPILER_LOADED)) +if(NOT (CMAKE_C_COMPILER_LOADED OR CMAKE_CXX_COMPILER_LOADED)) message(FATAL_ERROR "This module required C or C++ to be enabled") endif() -include(CMakeDependentOption) - if(CMAKE_CXX_COMPILER_LOADED) include(CheckCXXSourceRuns) include(CheckCXXSourceCompiles) @@ -38,6 +36,9 @@ if(CMAKE_C_COMPILER_LOADED) include(CheckCSourceCompiles) include(CheckCCompilerFlag) endif() +include(CMakeDependentOption) +include(CheckLibraryExists) +include(CheckIncludeFiles) # Check if the same compile family is used for both C and CXX if(CMAKE_C_COMPILER_LOADED AND CMAKE_CXX_COMPILER_LOADED AND @@ -150,6 +151,16 @@ if(WIN32 AND CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG}) unset(__GCC_TARGET_MACHINE) endif() +if(NOT DEFINED IOS) + if(APPLE AND (CMAKE_SYSTEM_NAME STREQUAL "iOS" + OR DEFINED CMAKE_IOS_DEVELOPER_ROOT + OR DEFINED IOS_PLATFORM OR DEFINED IOS_ARCH)) + set(IOS TRUE) + else() + set(IOS FALSE) + endif() +endif() + if(CMAKE_COMPILER_IS_ELBRUSC OR CMAKE_SYSTEM_PROCESSOR MATCHES "e2k.*|E2K.*|elbrus.*|ELBRUS.*") set(E2K TRUE) set(CMAKE_SYSTEM_ARCH "Elbrus") @@ -214,6 +225,15 @@ else() check_compiler_flag("-Ominimal" CC_HAS_OMINIMAL) check_compiler_flag("-ffunction-sections -fdata-sections" CC_HAS_SECTIONS) check_compiler_flag("-ffast-math" CC_HAS_FASTMATH) + check_compiler_flag("-Wno-attributes" CC_HAS_WNO_ATTRIBUTES) + + # Check for an omp support + set(CMAKE_REQUIRED_FLAGS "-fopenmp -Werror") + check_cxx_source_compiles("int main(void) { + #pragma omp parallel + return 0; + }" HAVE_OPENMP) + set(CMAKE_REQUIRED_FLAGS "") endif() # Check for LTO support by GCC @@ -276,7 +296,7 @@ if(CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG}) endif() # check for LTO by MSVC -if(MSVC) +if(MSVC AND NOT CMAKE_COMPILER_IS_CLANG) if(NOT MSVC_VERSION LESS 1600) set(MSVC_LTO_AVAILABLE TRUE) message(STATUS "Link-Time Optimization by MSVC is available") @@ -290,25 +310,37 @@ endif() if(CMAKE_COMPILER_IS_CLANG) if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 3.5) execute_process(COMMAND ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} -print-search-dirs - OUTPUT_VARIABLE clang_search_dirs) + OUTPUT_VARIABLE clang_search_dirs RESULT_VARIABLE clang_probe_result ERROR_QUIET) unset(clang_bindir) unset(clang_libdir) - string(REGEX MATCH "^(.*programs: =)([^:]*:)*([^:]+/llvm[-.0-9]+/bin[^:]*)(:[^:]*)*(\n.+)$" clang_bindir_valid ${clang_search_dirs}) - if(clang_bindir_valid) - string(REGEX REPLACE "^(.*programs: =)([^:]*:)*([^:]+/llvm[-.0-9]+/bin[^:]*)(:[^:]*)*(\n.+)$" "\\3" clang_bindir ${clang_search_dirs}) - get_filename_component(clang_libdir "${clang_bindir}/../lib" REALPATH) - if(clang_libdir) - message(STATUS "Found CLANG/LLVM directories: ${clang_bindir}, ${clang_libdir}") + if(clang_probe_result EQUAL 0) + string(REGEX MATCH "^(.*programs: =)([^:]*:)*([^:]+/llvm[-.0-9]+/bin[^:]*)(:[^:]*)*(\n.+)$" clang_bindir_valid ${clang_search_dirs}) + if(clang_bindir_valid) + string(REGEX REPLACE "^(.*programs: =)([^:]*:)*([^:]+/llvm[-.0-9]+/bin[^:]*)(:[^:]*)*(\n.+)$" "\\3" clang_bindir ${clang_search_dirs}) + if(CMAKE_SYSTEM_NAME STREQUAL "WINDOWS") + set(clang_libdir ${clang_bindir}) + else() + get_filename_component(clang_libdir "${clang_bindir}/../lib" REALPATH) + endif() + endif() + else() + get_filename_component(clang_bindir ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} DIRECTORY) + if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows") + set(clang_libdir ${clang_bindir}) + else() + get_filename_component(clang_libdir "${clang_bindir}/../lib" REALPATH) endif() endif() - if(NOT (clang_bindir AND clang_libdir)) + if(clang_bindir AND clang_libdir) + message(STATUS "Found CLANG/LLVM directories: ${clang_bindir}, ${clang_libdir}") + else() message(STATUS "Could NOT find CLANG/LLVM directories (bin and/or lib).") endif() if(NOT CMAKE_CLANG_LD AND clang_bindir) - find_program(CMAKE_CLANG_LD NAMES llvm-link link llvm-ld ld PATHS ${clang_bindir} NO_DEFAULT_PATH) + find_program(CMAKE_CLANG_LD NAMES lld-link ld.lld ld64.lld lld-link llvm-link link llvm-ld ld PATHS ${clang_bindir} NO_DEFAULT_PATH) endif() if(NOT CMAKE_CLANG_AR AND clang_bindir) find_program(CMAKE_CLANG_AR NAMES llvm-ar ar PATHS ${clang_bindir} NO_DEFAULT_PATH) @@ -346,19 +378,19 @@ if(CMAKE_COMPILER_IS_CLANG) unset(clang_search_dirs) endif() - if((CLANG_LTO_PLUGIN AND CMAKE_LD_GOLD) AND + if((CLANG_LTO_PLUGIN AND CMAKE_LD_GOLD) OR (CMAKE_CLANG_LD AND CMAKE_CLANG_AR AND CMAKE_CLANG_NM AND CMAKE_CLANG_RANLIB)) set(CLANG_LTO_AVAILABLE TRUE) message(STATUS "Link-Time Optimization by CLANG/LLVM is available") elseif(CMAKE_TOOLCHAIN_FILE AND NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 7.0) set(CLANG_LTO_AVAILABLE TRUE) - if (NOT CMAKE_CLANG_AR) + if(NOT CMAKE_CLANG_AR) set(CMAKE_CLANG_AR ${CMAKE_AR}) endif() - if (NOT CMAKE_CLANG_NM) + if(NOT CMAKE_CLANG_NM) set(CMAKE_CLANG_NM ${CMAKE_NM}) endif() - if (NOT CMAKE_CLANG_RANLIB) + if(NOT CMAKE_CLANG_RANLIB) set(CMAKE_CLANG_RANLIB ${CMAKE_RANLIB}) endif() message(STATUS "Assume Link-Time Optimization by CLANG/LLVM is available via ${CMAKE_TOOLCHAIN_FILE}") @@ -408,7 +440,7 @@ if(ENABLE_BACKTRACE) endif() macro(setup_compile_flags) - # LY: save initial C/CXX flags + # save initial C/CXX flags if(NOT INITIAL_CMAKE_FLAGS_SAVED) if(MSVC) string(REGEX REPLACE "^(.*)(/EHsc)( *)(.*)$" "\\1/EHs\\3\\4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") @@ -422,7 +454,7 @@ macro(setup_compile_flags) set(INITIAL_CMAKE_FLAGS_SAVED TRUE CACHE INTERNAL "State of initial CMake's flags" FORCE) endif() - # LY: reset C/CXX flags + # reset C/CXX flags set(CXX_FLAGS ${INITIAL_CMAKE_CXX_FLAGS}) set(C_FLAGS ${INITIAL_CMAKE_C_FLAGS}) set(EXE_LINKER_FLAGS ${INITIAL_CMAKE_EXE_LINKER_FLAGS}) @@ -437,6 +469,12 @@ macro(setup_compile_flags) add_compile_flags("CXX" "-fcxx-exceptions -frtti") endif() + if(CC_HAS_WNO_ATTRIBUTES AND CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG} + AND CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 9) + # GCC < 9.x generates false-positive warnings for optimization attributes + add_compile_flags("C;CXX" "-Wno-attributes") + endif() + # In C a global variable without a storage specifier (static/extern) and # without an initialiser is called a ’tentative definition’. The # language permits multiple tentative definitions in the single @@ -482,7 +520,7 @@ macro(setup_compile_flags) endif() if(MSVC) - if (MSVC_VERSION LESS 1900) + if(MSVC_VERSION LESS 1900) message(FATAL_ERROR "At least \"Microsoft C/C++ Compiler\" version 19.0.24234.1 (Visual Studio 2015 Update 3) is required.") endif() add_compile_flags("CXX" "/Zc:__cplusplus") @@ -514,11 +552,11 @@ macro(setup_compile_flags) if(MSVC) add_compile_flags("C;CXX" "/WX") elseif(CMAKE_COMPILER_IS_CLANG) - if (NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 6) + if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 6) add_compile_flags("C;CXX" "-Werror") endif() elseif(CMAKE_COMPILER_IS_GNUCC) - if (NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 6) + if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 6) add_compile_flags("C;CXX" "-Werror") endif() else() @@ -526,7 +564,7 @@ macro(setup_compile_flags) endif() endif() - if (ENABLE_ASAN) + if(ENABLE_ASAN) add_compile_flags("C;CXX" -fsanitize=address) endif() @@ -564,7 +602,7 @@ macro(setup_compile_flags) endif() endif() - if(MSVC AND LTO_ENABLED) + if(MSVC AND NOT CMAKE_COMPILER_IS_CLANG AND LTO_ENABLED) add_compile_flags("C;CXX" "/GL") foreach(linkmode IN ITEMS EXE SHARED STATIC MODULE) set(${linkmode}_LINKER_FLAGS "${${linkmode}_LINKER_FLAGS} /LTCG") @@ -617,12 +655,14 @@ macro(setup_compile_flags) set(CLANG_LTO_FLAG "-flto=thin") endif() add_compile_flags("C;CXX" ${CLANG_LTO_FLAG}) - set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm -fwhole-program") - set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm") - set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm") + if(NOT MSVC) + set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm -fwhole-program") + set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm") + set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm") + endif() endif() - # LY: push C/CXX flags into the cache + # push C/CXX flags into the cache set(CMAKE_CXX_FLAGS ${CXX_FLAGS} CACHE STRING "Flags used by the C++ compiler during all build types" FORCE) set(CMAKE_C_FLAGS ${C_FLAGS} CACHE STRING "Flags used by the C compiler during all build types" FORCE) set(CMAKE_EXE_LINKER_FLAGS ${EXE_LINKER_FLAGS} CACHE STRING "Flags used by the linker" FORCE) @@ -640,11 +680,11 @@ endmacro(setup_compile_flags) # determine library for for std::filesystem set(LIBCXX_FILESYSTEM "") if(CMAKE_COMPILER_IS_GNUCXX) - if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0) + if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 9.0) set(LIBCXX_FILESYSTEM "stdc++fs") endif() -elseif (CMAKE_COMPILER_IS_CLANG) - if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0) +elseif(CMAKE_COMPILER_IS_CLANG) + if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0) set(LIBCXX_FILESYSTEM "c++experimental") else() set(LIBCXX_FILESYSTEM "stdc++fs") diff --git a/libs/libmdbx/src/cmake/utils.cmake b/libs/libmdbx/src/cmake/utils.cmake index 22e0d72f57..13add097dc 100644 --- a/libs/libmdbx/src/cmake/utils.cmake +++ b/libs/libmdbx/src/cmake/utils.cmake @@ -61,7 +61,7 @@ macro(set_source_files_compile_flags) unset(_lang) endmacro(set_source_files_compile_flags) -macro(fetch_version name version_file) +macro(fetch_version name version_file parent_scope) set(${name}_VERSION "") set(${name}_GIT_DESCRIBE "") set(${name}_GIT_TIMESTAMP "") @@ -69,7 +69,7 @@ macro(fetch_version name version_file) set(${name}_GIT_COMMIT "") set(${name}_GIT_REVISION 0) set(${name}_GIT_VERSION "") - if(GIT) + if(GIT AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git") execute_process(COMMAND ${GIT} describe --tags --long --dirty=-dirty OUTPUT_VARIABLE ${name}_GIT_DESCRIBE OUTPUT_STRIP_TRAILING_WHITESPACE @@ -137,7 +137,9 @@ macro(fetch_version name version_file) endif() if(NOT ${name}_GIT_VERSION OR NOT ${name}_GIT_TIMESTAMP OR NOT ${name}_GIT_REVISION) - message(WARNING "Unable to retrive ${name} version from git.") + if(GIT AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git") + message(WARNING "Unable to retrive ${name} version from git.") + endif() set(${name}_GIT_VERSION "0;0;0;0") set(${name}_GIT_TIMESTAMP "") set(${name}_GIT_REVISION 0) @@ -166,18 +168,33 @@ macro(fetch_version name version_file) list(GET ${name}_VERSION_LIST 2 "${name}_VERSION_RELEASE") list(GET ${name}_VERSION_LIST 3 "${name}_VERSION_REVISION") - set(${name}_VERSION_MAJOR ${${name}_VERSION_MAJOR} PARENT_SCOPE) - set(${name}_VERSION_MINOR ${${name}_VERSION_MINOR} PARENT_SCOPE) - set(${name}_VERSION_RELEASE ${${name}_VERSION_RELEASE} PARENT_SCOPE) - set(${name}_VERSION_REVISION ${${name}_VERSION_REVISION} PARENT_SCOPE) - set(${name}_VERSION ${${name}_VERSION} PARENT_SCOPE) - - set(${name}_GIT_DESCRIBE ${${name}_GIT_DESCRIBE} PARENT_SCOPE) - set(${name}_GIT_TIMESTAMP ${${name}_GIT_TIMESTAMP} PARENT_SCOPE) - set(${name}_GIT_TREE ${${name}_GIT_TREE} PARENT_SCOPE) - set(${name}_GIT_COMMIT ${${name}_GIT_COMMIT} PARENT_SCOPE) - set(${name}_GIT_REVISION ${${name}_GIT_REVISION} PARENT_SCOPE) - set(${name}_GIT_VERSION ${${name}_GIT_VERSION} PARENT_SCOPE) + if(parent_scope) + set(${name}_VERSION_MAJOR ${${name}_VERSION_MAJOR} PARENT_SCOPE) + set(${name}_VERSION_MINOR ${${name}_VERSION_MINOR} PARENT_SCOPE) + set(${name}_VERSION_RELEASE ${${name}_VERSION_RELEASE} PARENT_SCOPE) + set(${name}_VERSION_REVISION ${${name}_VERSION_REVISION} PARENT_SCOPE) + set(${name}_VERSION ${${name}_VERSION} PARENT_SCOPE) + + set(${name}_GIT_DESCRIBE ${${name}_GIT_DESCRIBE} PARENT_SCOPE) + set(${name}_GIT_TIMESTAMP ${${name}_GIT_TIMESTAMP} PARENT_SCOPE) + set(${name}_GIT_TREE ${${name}_GIT_TREE} PARENT_SCOPE) + set(${name}_GIT_COMMIT ${${name}_GIT_COMMIT} PARENT_SCOPE) + set(${name}_GIT_REVISION ${${name}_GIT_REVISION} PARENT_SCOPE) + set(${name}_GIT_VERSION ${${name}_GIT_VERSION} PARENT_SCOPE) + else() + set(${name}_VERSION_MAJOR ${${name}_VERSION_MAJOR}) + set(${name}_VERSION_MINOR ${${name}_VERSION_MINOR}) + set(${name}_VERSION_RELEASE ${${name}_VERSION_RELEASE}) + set(${name}_VERSION_REVISION ${${name}_VERSION_REVISION}) + set(${name}_VERSION ${${name}_VERSION}) + + set(${name}_GIT_DESCRIBE ${${name}_GIT_DESCRIBE}) + set(${name}_GIT_TIMESTAMP ${${name}_GIT_TIMESTAMP}) + set(${name}_GIT_TREE ${${name}_GIT_TREE}) + set(${name}_GIT_COMMIT ${${name}_GIT_COMMIT}) + set(${name}_GIT_REVISION ${${name}_GIT_REVISION}) + set(${name}_GIT_VERSION ${${name}_GIT_VERSION}) + endif() endmacro(fetch_version) cmake_policy(POP) diff --git a/libs/libmdbx/src/config.h b/libs/libmdbx/src/config.h new file mode 100644 index 0000000000..cc79caf8ed --- /dev/null +++ b/libs/libmdbx/src/config.h @@ -0,0 +1,52 @@ +/* This is CMake-template for libmdbx's config.h + ******************************************************************************/ + +/* *INDENT-OFF* */ +/* clang-format off */ + +#define LTO_ENABLED +/* #undef MDBX_USE_VALGRIND */ +/* #undef ENABLE_GPROF */ +/* #undef ENABLE_GCOV */ +/* #undef ENABLE_ASAN */ +/* #undef MDBX_FORCE_ASSERTIONS */ + +/* Common */ +#define MDBX_TXN_CHECKOWNER 1 +#define MDBX_TXN_CHECKPID_AUTO +#ifndef MDBX_TXN_CHECKPID_AUTO +#define MDBX_TXN_CHECKPID 0 +#endif +#define MDBX_LOCKING_AUTO +#ifndef MDBX_LOCKING_AUTO +/* #undef MDBX_LOCKING */ +#endif +#define MDBX_TRUST_RTC_AUTO +#ifndef MDBX_TRUST_RTC_AUTO +#define MDBX_TRUST_RTC 0 +#endif + +/* Windows */ +#define MDBX_CONFIG_MANUAL_TLS_CALLBACK 1 +#define MDBX_AVOID_CRT 1 + +/* MacOS & iOS */ +#define MDBX_OSX_SPEED_INSTEADOF_DURABILITY 0 + +/* POSIX */ +#define MDBX_DISABLE_GNU_SOURCE 0 +/* #undef MDBX_USE_OFDLOCKS_AUTO */ +#ifndef MDBX_USE_OFDLOCKS_AUTO +#define MDBX_USE_OFDLOCKS 0 +#endif + +/* Build Info */ +#define MDBX_BUILD_TIMESTAMP "2020-04-25T08:31:34Z" +#define MDBX_BUILD_TARGET "x86_64-Windows" +/* #undef MDBX_BUILD_TYPE */ +#define MDBX_BUILD_COMPILER "MSVC-19.25.28614.0" +#define MDBX_BUILD_FLAGS "/DWIN32 /D_WINDOWS /W3 /Gy /W4 /utf-8 /WX /GL MDBX_BUILD_SHARED_LIBRARY=0" +#define MDBX_BUILD_SOURCERY 51d296e8c57b5c01204315d0ea2160b23cf3eb40509644354cc038e3f67d61d4_v0_7_0_39_gca8fa31 + +/* *INDENT-ON* */ +/* clang-format on */ diff --git a/libs/libmdbx/src/mdbx.h b/libs/libmdbx/src/mdbx.h index 971b009402..c7a6ab3f43 100644 --- a/libs/libmdbx/src/mdbx.h +++ b/libs/libmdbx/src/mdbx.h @@ -555,6 +555,11 @@ #include #include + +#ifndef FSCTL_GET_EXTERNAL_BACKING +#define FSCTL_GET_EXTERNAL_BACKING CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 196, METHOD_BUFFERED, FILE_ANY_ACCESS) +#endif + #ifndef __mode_t_defined typedef unsigned short mode_t; #endif @@ -653,8 +658,9 @@ typedef pthread_t mdbx_tid_t; /*----------------------------------------------------------------------------*/ +/* MDBX version 0.7.0, released 2020-03-18 */ #define MDBX_VERSION_MAJOR 0 -#define MDBX_VERSION_MINOR 6 +#define MDBX_VERSION_MINOR 7 #ifndef LIBMDBX_API #if defined(LIBMDBX_EXPORTS) @@ -1202,10 +1208,11 @@ LIBMDBX_API const char *mdbx_dump_val(const MDBX_val *key, char *const buf, * In case single transaction after mdbx_env_sync, you may lose * transaction itself, but not a whole database. * - * Nevertheless, MDBX_UTTERLY_NOSYNC provides ACID in case of a application - * crash, and therefore may be very useful in scenarios where data - * durability is not required over a system failure (e.g for short-lived - * data), or if you can ignore such risk. + * Nevertheless, MDBX_UTTERLY_NOSYNC provides "weak" durability in case of + * an application crash (but no durability on system failure), and + * therefore may be very useful in scenarios where data durability is not + * required over a system failure (e.g for short-lived data), or if you can + * take such risk. * * MDBX_UTTERLY_NOSYNC flag may be changed at any time using * mdbx_env_set_flags(), but don't has effect if passed to mdbx_txn_begin() @@ -1447,7 +1454,8 @@ typedef enum MDBX_cursor_op { /* Transaction has too many dirty pages, i.e transaction too big */ #define MDBX_TXN_FULL (-30788) -/* Cursor stack too deep - internal error */ +/* Cursor stack too deep - this usually indicates corruption, + * i.e branch-pages loop */ #define MDBX_CURSOR_FULL (-30787) /* Page has not enough space - internal error */ @@ -1462,6 +1470,13 @@ typedef enum MDBX_cursor_op { * or explicit call of mdbx_env_set_geometry(). */ #define MDBX_UNABLE_EXTEND_MAPSIZE (-30785) +/* MDBX_MAP_RESIZED is deprecated. + * Please review your code to use MDBX_UNABLE_EXTEND_MAPSIZE instead. */ +static __inline int __deprecated MDBX_MAP_RESIZED() { + return MDBX_UNABLE_EXTEND_MAPSIZE; +} +#define MDBX_MAP_RESIZED MDBX_MAP_RESIZED() + /* Environment or database is not compatible with the requested operation * or the specified flags. This can mean: * - The operation expects an MDBX_DUPSORT / MDBX_DUPFIXED database. @@ -1904,14 +1919,17 @@ LIBMDBX_API int mdbx_env_set_syncperiod(MDBX_env *env, * * Returns A non-zero error value on failure and 0 on success. * Some possible errors are: - * - MDBX_BUSY = The write transaction is running by other thread, in such - * case MDBX_env instance has NOT be destroyed not released! - * NOTE: if any OTHER error code was returned then given - * MDBX_env instance has been destroyed and released. - * - MDBX_PANIC = If mdbx_env_close_ex() was called in the child process - * after fork(). In this case MDBX_PANIC is a expecte, - * i.e. MDBX_env instance was freed in proper manner. - * - MDBX_EIO = an error occurred during synchronization. */ + * - MDBX_BUSY = The write transaction is running by other thread, in such + * case MDBX_env instance has NOT be destroyed not released! + * NOTE: if any OTHER error code was returned then given + * MDBX_env instance has been destroyed and released. + * - MDBX_EBADSIGN = Environment handle already closed (i.e. mdbx_env_close() + * was already called or not valid (i.e. was not created + * by mdbx_env_create()). + * - MDBX_PANIC = If mdbx_env_close_ex() was called in the child process + * after fork(). In this case MDBX_PANIC is a expecte, + * i.e. MDBX_env instance was freed in proper manner. + * - MDBX_EIO = an error occurred during synchronization. */ LIBMDBX_API int mdbx_env_close_ex(MDBX_env *env, int dont_sync); LIBMDBX_API int mdbx_env_close(MDBX_env *env); @@ -1942,7 +1960,7 @@ LIBMDBX_API int mdbx_env_set_flags(MDBX_env *env, unsigned flags, int onoff); * Returns A non-zero error value on failure and 0 on success, some * possible errors are: * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_env_get_flags(MDBX_env *env, unsigned *flags); +LIBMDBX_API int mdbx_env_get_flags(const MDBX_env *env, unsigned *flags); /* Return the path that was used in mdbx_env_open(). * @@ -1954,7 +1972,7 @@ LIBMDBX_API int mdbx_env_get_flags(MDBX_env *env, unsigned *flags); * Returns A non-zero error value on failure and 0 on success, some * possible errors are: * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_env_get_path(MDBX_env *env, const char **dest); +LIBMDBX_API int mdbx_env_get_path(const MDBX_env *env, const char **dest); /* Return the file descriptor for the given environment. * @@ -1967,7 +1985,7 @@ LIBMDBX_API int mdbx_env_get_path(MDBX_env *env, const char **dest); * Returns A non-zero error value on failure and 0 on success, some * possible errors are: * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_env_get_fd(MDBX_env *env, mdbx_filehandle_t *fd); +LIBMDBX_API int mdbx_env_get_fd(const MDBX_env *env, mdbx_filehandle_t *fd); /* Set all size-related parameters of environment, including page size and the * min/max size of the memory map. @@ -2220,7 +2238,7 @@ LIBMDBX_API int mdbx_env_set_maxreaders(MDBX_env *env, unsigned readers); * Returns A non-zero error value on failure and 0 on success, some * possible errors are: * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_env_get_maxreaders(MDBX_env *env, unsigned *readers); +LIBMDBX_API int mdbx_env_get_maxreaders(const MDBX_env *env, unsigned *readers); /* Set the maximum number of named databases for the environment. * @@ -2251,9 +2269,9 @@ LIBMDBX_API int mdbx_env_set_maxdbs(MDBX_env *env, MDBX_dbi dbs); * * Returns The maximum size of a key we can write, * or -1 if something is wrong. */ -LIBMDBX_API int mdbx_env_get_maxkeysize_ex(MDBX_env *env, unsigned flags); -LIBMDBX_API int mdbx_env_get_maxvalsize_ex(MDBX_env *env, unsigned flags); -__deprecated LIBMDBX_API int mdbx_env_get_maxkeysize(MDBX_env *env); +LIBMDBX_API int mdbx_env_get_maxkeysize_ex(const MDBX_env *env, unsigned flags); +LIBMDBX_API int mdbx_env_get_maxvalsize_ex(const MDBX_env *env, unsigned flags); +__deprecated LIBMDBX_API int mdbx_env_get_maxkeysize(const MDBX_env *env); /* Set application information associated with the MDBX_env. * @@ -2267,7 +2285,7 @@ LIBMDBX_API int mdbx_env_set_userctx(MDBX_env *env, void *ctx); * * [in] env An environment handle returned by mdbx_env_create() * Returns The pointer set by mdbx_env_set_userctx(). */ -LIBMDBX_API void *mdbx_env_get_userctx(MDBX_env *env); +LIBMDBX_API void *mdbx_env_get_userctx(const MDBX_env *env); /* Create a transaction for use with the environment. * @@ -2380,12 +2398,13 @@ typedef struct MDBX_txn_info { * not needed (see description of MDBX_txn_info above). * * Returns A non-zero error value on failure and 0 on success. */ -LIBMDBX_API int mdbx_txn_info(MDBX_txn *txn, MDBX_txn_info *info, int scan_rlt); +LIBMDBX_API int mdbx_txn_info(const MDBX_txn *txn, MDBX_txn_info *info, + int scan_rlt); /* Returns the transaction's MDBX_env. * * [in] txn A transaction handle returned by mdbx_txn_begin() */ -LIBMDBX_API MDBX_env *mdbx_txn_env(MDBX_txn *txn); +LIBMDBX_API MDBX_env *mdbx_txn_env(const MDBX_txn *txn); /* Return the transaction's flags. * @@ -2395,7 +2414,7 @@ LIBMDBX_API MDBX_env *mdbx_txn_env(MDBX_txn *txn); * * Returns A transaction flags, valid if input is an valid transaction, * otherwise -1. */ -LIBMDBX_API int mdbx_txn_flags(MDBX_txn *txn); +LIBMDBX_API int mdbx_txn_flags(const MDBX_txn *txn); /* Return the transaction's ID. * @@ -2407,7 +2426,7 @@ LIBMDBX_API int mdbx_txn_flags(MDBX_txn *txn); * * Returns A transaction ID, valid if input is an active transaction, * otherwise 0. */ -LIBMDBX_API uint64_t mdbx_txn_id(MDBX_txn *txn); +LIBMDBX_API uint64_t mdbx_txn_id(const MDBX_txn *txn); /* Commit all the operations of a transaction into the database. * @@ -2514,7 +2533,7 @@ LIBMDBX_API int mdbx_canary_put(MDBX_txn *txn, const mdbx_canary *canary); * will be copied. * * Returns A non-zero error value on failure and 0 on success. */ -LIBMDBX_API int mdbx_canary_get(MDBX_txn *txn, mdbx_canary *canary); +LIBMDBX_API int mdbx_canary_get(const MDBX_txn *txn, mdbx_canary *canary); /* A callback function used to compare two keys in a database */ typedef int(MDBX_cmp_func)(const MDBX_val *a, const MDBX_val *b); @@ -2589,9 +2608,14 @@ typedef int(MDBX_cmp_func)(const MDBX_val *a, const MDBX_val *b); * comparison functions for keys and values (for multimaps). * However, I recommend not using custom comparison functions, but instead * converting the keys to one of the forms that are suitable for built-in - * comparators. The main reason for this is that you can't use mdbx_chk tools - * with a custom comparators. For instance take look to the mdbx_key_from_xxx() - * functions. + * comparators (for instance take look to the mdbx_key_from_xxx() + * functions). The reasons to not using custom comparators are: + * - The order of records could not be validated without your code. + * So mdbx_chk utility will reports "wrong order" errors + * and the '-i' option is required to ignore ones. + * - A records could not be ordered or sorted without your code. + * So mdbx_load utility should be used with '-a' option to preserve + * input data order. * * [in] keycmp Optional custom key comparison function for a database. * [in] datacmp Optional custom data comparison function for a database, takes @@ -2725,7 +2749,7 @@ LIBMDBX_API int mdbx_drop(MDBX_txn *txn, MDBX_dbi dbi, int del); * possible errors are: * - MDBX_NOTFOUND = the key was not in the database. * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_get(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, +LIBMDBX_API int mdbx_get(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, MDBX_val *data); /* Get items from a database and optionaly number of data items for a given key. @@ -2837,7 +2861,7 @@ LIBMDBX_API int mdbx_get_nearest(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, * - MDBX_TXN_FULL = the transaction has too many dirty pages. * - MDBX_EACCES = an attempt was made to write in a read-only transaction. * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_put(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, +LIBMDBX_API int mdbx_put(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, MDBX_val *data, unsigned flags); /* Replace items in a database. @@ -2876,7 +2900,7 @@ LIBMDBX_API int mdbx_put(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, * multi-value/duplicates. * * Returns A non-zero error value on failure and 0 on success. */ -LIBMDBX_API int mdbx_replace(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, +LIBMDBX_API int mdbx_replace(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, MDBX_val *new_data, MDBX_val *old_data, unsigned flags); @@ -2900,8 +2924,8 @@ LIBMDBX_API int mdbx_replace(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, * possible errors are: * - MDBX_EACCES = an attempt was made to write in a read-only transaction. * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_del(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, - MDBX_val *data); +LIBMDBX_API int mdbx_del(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, + const MDBX_val *data); /* Create a cursor handle. * @@ -2965,12 +2989,12 @@ LIBMDBX_API int mdbx_cursor_renew(MDBX_txn *txn, MDBX_cursor *cursor); /* Return the cursor's transaction handle. * * [in] cursor A cursor handle returned by mdbx_cursor_open(). */ -LIBMDBX_API MDBX_txn *mdbx_cursor_txn(MDBX_cursor *cursor); +LIBMDBX_API MDBX_txn *mdbx_cursor_txn(const MDBX_cursor *cursor); /* Return the cursor's database handle. * * [in] cursor A cursor handle returned by mdbx_cursor_open(). */ -LIBMDBX_API MDBX_dbi mdbx_cursor_dbi(MDBX_cursor *cursor); +LIBMDBX_API MDBX_dbi mdbx_cursor_dbi(const MDBX_cursor *cursor); /* Retrieve by cursor. * @@ -2997,11 +3021,11 @@ LIBMDBX_API int mdbx_cursor_get(MDBX_cursor *cursor, MDBX_val *key, * This function stores key/data pairs into the database. The cursor is * positioned at the new item, or on failure usually near it. * - * [in] cursor A cursor handle returned by mdbx_cursor_open(). - * [in] key The key operated on. - * [in] data The data operated on. - * [in] flags Options for this operation. This parameter - * must be set to 0 or one of the values described here: + * [in] cursor A cursor handle returned by mdbx_cursor_open(). + * [in] key The key operated on. + * [in,out] data The data operated on. + * [in] flags Options for this operation. This parameter + * must be set to 0 or one of the values described here: * * - MDBX_CURRENT * Replace the item at the current cursor position. The key parameter @@ -3058,7 +3082,7 @@ LIBMDBX_API int mdbx_cursor_get(MDBX_cursor *cursor, MDBX_val *key, * - MDBX_TXN_FULL = the transaction has too many dirty pages. * - MDBX_EACCES = an attempt was made to write in a read-only transaction. * - MDBX_EINVAL = an invalid parameter was specified. */ -LIBMDBX_API int mdbx_cursor_put(MDBX_cursor *cursor, MDBX_val *key, +LIBMDBX_API int mdbx_cursor_put(MDBX_cursor *cursor, const MDBX_val *key, MDBX_val *data, unsigned flags); /* Delete current key/data pair. @@ -3094,7 +3118,7 @@ LIBMDBX_API int mdbx_cursor_del(MDBX_cursor *cursor, unsigned flags); * possible errors are: * - MDBX_EINVAL = cursor is not initialized, or an invalid parameter * was specified. */ -LIBMDBX_API int mdbx_cursor_count(MDBX_cursor *cursor, size_t *countp); +LIBMDBX_API int mdbx_cursor_count(const MDBX_cursor *cursor, size_t *countp); /* Determines whether the cursor is pointed to a key-value pair or not, * i.e. was not positioned or points to the end of data. @@ -3105,7 +3129,7 @@ LIBMDBX_API int mdbx_cursor_count(MDBX_cursor *cursor, size_t *countp); * - MDBX_RESULT_TRUE = no more data available or cursor not positioned; * - MDBX_RESULT_FALSE = data available; * - Otherwise the error code. */ -LIBMDBX_API int mdbx_cursor_eof(MDBX_cursor *mc); +LIBMDBX_API int mdbx_cursor_eof(const MDBX_cursor *mc); /* Determines whether the cursor is pointed to the first key-value pair or not. * @@ -3115,7 +3139,7 @@ LIBMDBX_API int mdbx_cursor_eof(MDBX_cursor *mc); * - MDBX_RESULT_TRUE = cursor positioned to the first key-value pair. * - MDBX_RESULT_FALSE = cursor NOT positioned to the first key-value pair. * - Otherwise the error code. */ -LIBMDBX_API int mdbx_cursor_on_first(MDBX_cursor *mc); +LIBMDBX_API int mdbx_cursor_on_first(const MDBX_cursor *mc); /* Determines whether the cursor is pointed to the last key-value pair or not. * @@ -3125,7 +3149,7 @@ LIBMDBX_API int mdbx_cursor_on_first(MDBX_cursor *mc); * - MDBX_RESULT_TRUE = cursor positioned to the last key-value pair. * - MDBX_RESULT_FALSE = cursor NOT positioned to the last key-value pair. * - Otherwise the error code. */ -LIBMDBX_API int mdbx_cursor_on_last(MDBX_cursor *mc); +LIBMDBX_API int mdbx_cursor_on_last(const MDBX_cursor *mc); /* Estimates the distance between cursors as a number of elements. The results * of such estimation can be used to build and/or optimize query execution @@ -3280,7 +3304,7 @@ LIBMDBX_API int mdbx_dbi_sequence(MDBX_txn *txn, MDBX_dbi dbi, uint64_t *result, * [in] b The second item to compare. * * Returns < 0 if a < b, 0 if a == b, > 0 if a > b */ -LIBMDBX_API int mdbx_cmp(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, +LIBMDBX_API int mdbx_cmp(const MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, const MDBX_val *b); /* Compare two data items according to a particular database. @@ -3294,7 +3318,7 @@ LIBMDBX_API int mdbx_cmp(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, * [in] b The second item to compare. * * Returns < 0 if a < b, 0 if a == b, > 0 if a > b */ -LIBMDBX_API int mdbx_dcmp(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, +LIBMDBX_API int mdbx_dcmp(const MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, const MDBX_val *b); /* A callback function used to enumerate the reader lock table. @@ -3330,8 +3354,8 @@ typedef int(MDBX_reader_list_func)(void *ctx, int num, int slot, mdbx_pid_t pid, * * Returns A non-zero error value on failure and 0 on success, * or MDBX_RESULT_TRUE (-1) if the reader lock table is empty. */ -LIBMDBX_API int mdbx_reader_list(MDBX_env *env, MDBX_reader_list_func *func, - void *ctx); +LIBMDBX_API int mdbx_reader_list(const MDBX_env *env, + MDBX_reader_list_func *func, void *ctx); /* Check for stale entries in the reader lock table. * @@ -3353,7 +3377,8 @@ LIBMDBX_API int mdbx_reader_check(MDBX_env *env, int *dead); * * Returns Number of transactions committed after the given was started for * read, or negative value on failure. */ -__deprecated LIBMDBX_API int mdbx_txn_straggler(MDBX_txn *txn, int *percent); +__deprecated LIBMDBX_API int mdbx_txn_straggler(const MDBX_txn *txn, + int *percent); /* A lack-of-space callback function to resolve issues with a laggard readers. * @@ -3426,7 +3451,7 @@ LIBMDBX_API int mdbx_env_set_oomfunc(MDBX_env *env, MDBX_oom_func *oom_func); * [in] env An environment handle returned by mdbx_env_create(). * * Returns A MDBX_oom_func function or NULL if disabled. */ -LIBMDBX_API MDBX_oom_func *mdbx_env_get_oomfunc(MDBX_env *env); +LIBMDBX_API MDBX_oom_func *mdbx_env_get_oomfunc(const MDBX_env *env); /**** B-tree Traversal ********************************************************* * This is internal API for mdbx_chk tool. You should avoid to use it, except diff --git a/libs/libmdbx/src/src/CMakeLists.txt b/libs/libmdbx/src/src/CMakeLists.txt deleted file mode 100644 index 8a33ede361..0000000000 --- a/libs/libmdbx/src/src/CMakeLists.txt +++ /dev/null @@ -1,263 +0,0 @@ -## -## Copyright 2020 Leonid Yuriev -## and other libmdbx authors: please see AUTHORS file. -## All rights reserved. -## -## Redistribution and use in source and binary forms, with or without -## modification, are permitted only as authorized by the OpenLDAP -## Public License. -## -## A copy of this license is available in the file LICENSE in the -## top-level directory of the distribution or, alternatively, at -## . -## - -# Get version -fetch_version(MDBX "${CMAKE_CURRENT_SOURCE_DIR}/../VERSION") -message(STATUS "libmdbx version is ${MDBX_VERSION}") - -if(MDBX_ALLOY_MODE) - set(LIBMDBX_SOURCES alloy.c) -else() - set(LIBMDBX_SOURCES - elements/options.h elements/defs.h elements/internals.h elements/osal.h - elements/core.c elements/osal.c elements/lck-posix.c elements/lck-windows.c) -endif() -list(APPEND LIBMDBX_SOURCES ../mdbx.h - "${CMAKE_CURRENT_SOURCE_DIR}/elements/version.c" - "${CMAKE_CURRENT_SOURCE_DIR}/elements/config.h") - -if(MDBX_BUILD_SHARED_LIBRARY) - add_library(mdbx SHARED ${LIBMDBX_SOURCES}) - target_compile_definitions(mdbx PRIVATE LIBMDBX_EXPORTS INTERFACE LIBMDBX_IMPORTS) - set(MDBX_LIBDEP_MODE PRIVATE) -else() - add_library(mdbx STATIC ${LIBMDBX_SOURCES}) - set(MDBX_LIBDEP_MODE PUBLIC) -endif() - -if(CC_HAS_VISIBILITY AND (LTO_ENABLED OR INTERPROCEDURAL_OPTIMIZATION)) - set_target_properties(mdbx PROPERTIES LINK_FLAGS "-fvisibility=hidden") -endif() - -if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") - if(MSVC) - if(NOT MSVC_LIB_EXE) - # Find lib.exe - get_filename_component(CL_NAME ${CMAKE_C_COMPILER} NAME) - string(REPLACE cl.exe lib.exe MSVC_LIB_EXE ${CL_NAME}) - find_program(MSVC_LIB_EXE ${MSVC_LIB_EXE}) - endif() - if(MSVC_LIB_EXE) - message(STATUS "Found MSVC's lib tool: ${MSVC_LIB_EXE}") - set(MDBX_NTDLL_EXTRA_IMPLIB ${CMAKE_CURRENT_BINARY_DIR}/mdbx_ntdll_extra.lib) - add_custom_command(OUTPUT ${MDBX_NTDLL_EXTRA_IMPLIB} - COMMENT "Create extra-import-library for ntdll.dll" - MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/elements/ntdll.def" - COMMAND ${MSVC_LIB_EXE} /def:"${CMAKE_CURRENT_SOURCE_DIR}/elements/ntdll.def" /out:"${MDBX_NTDLL_EXTRA_IMPLIB}" ${INITIAL_CMAKE_STATIC_LINKER_FLAGS}) - else() - message(SEND_ERROR "MSVC's lib tool not found") - endif() - elseif(MINGW OR MINGW64) - if(NOT DLLTOOL) - # Find dlltool - get_filename_component(GCC_NAME ${CMAKE_C_COMPILER} NAME) - string(REPLACE gcc dlltool DLLTOOL_NAME ${GCC_NAME}) - find_program(DLLTOOL NAMES ${DLLTOOL_NAME}) - endif() - if(DLLTOOL) - message(STATUS "Found dlltool: ${DLLTOOL}") - set(MDBX_NTDLL_EXTRA_IMPLIB "${CMAKE_CURRENT_BINARY_DIR}/mdbx_ntdll_extra.a") - add_custom_command(OUTPUT ${MDBX_NTDLL_EXTRA_IMPLIB} - COMMENT "Create extra-import-library for ntdll.dll" - MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/elements/ntdll.def" - COMMAND ${DLLTOOL} -d "${CMAKE_CURRENT_SOURCE_DIR}/elements/ntdll.def" -l "${MDBX_NTDLL_EXTRA_IMPLIB}") - else() - message(SEND_ERROR "dlltool not found") - endif() - endif() -endif() - -target_link_libraries(mdbx ${MDBX_LIBDEP_MODE} ${CMAKE_THREAD_LIBS_INIT}) -if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") - target_link_libraries(mdbx ${MDBX_LIBDEP_MODE} ntdll.lib) - if(MDBX_NTDLL_EXTRA_IMPLIB) - # LY: Sometimes Cmake requires a nightmarish magic for simple things. - # 1) create a target out of the library compilation result - add_custom_target(ntdll_extra_target DEPENDS ${MDBX_NTDLL_EXTRA_IMPLIB}) - # 2) create an library target out of the library compilation result - add_library(ntdll_extra STATIC IMPORTED GLOBAL) - add_dependencies(ntdll_extra ntdll_extra_target) - # 3) specify where the library is (and where to find the headers) - set_target_properties(ntdll_extra - PROPERTIES - IMPORTED_LOCATION ${MDBX_NTDLL_EXTRA_IMPLIB}) - target_link_libraries(mdbx ${MDBX_LIBDEP_MODE} ntdll_extra) - endif() -endif() - -if(${CMAKE_SYSTEM_NAME} STREQUAL "SunOS" OR ${CMAKE_SYSTEM_NAME} STREQUAL "Solaris") - target_link_libraries(mdbx ${MDBX_LIBDEP_MODE} kstat) -endif() - -set_target_properties(mdbx PROPERTIES - INTERPROCEDURAL_OPTIMIZATION $ - C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON - PUBLIC_HEADER "../mdbx.h") - -if(CC_HAS_FASTMATH) - target_compile_options(mdbx PRIVATE "-ffast-math") -endif() -if(BUILD_FOR_NATIVE_CPU AND CC_HAS_ARCH_NATIVE) - target_compile_options(mdbx PUBLIC "-march=native") -endif() -if(CC_HAS_VISIBILITY) - target_compile_options(mdbx PRIVATE "-fvisibility=hidden") -endif() - -################################################################################ -# -# library build info (used in library version output) -# -set(MDBX_BUILD_FLAGS "") - -# append cmake's build-type flags and defines -if(NOT CMAKE_CONFIGURATION_TYPES) - list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UPPERCASE}}) - list(APPEND MDBX_BUILD_FLAGS ${CMAKE_C_DEFINES_${CMAKE_BUILD_TYPE_UPPERCASE}}) -endif() - -# append linker dll's options -if(LIBMDBX_TYPE STREQUAL "SHARED") - list(APPEND MDBX_BUILD_FLAGS ${CMAKE_SHARED_LINKER_FLAGS}) -endif() - -# get definitions -get_target_property(defs_list mdbx COMPILE_DEFINITIONS) -if(defs_list) - list(APPEND MDBX_BUILD_FLAGS ${defs_list}) -endif() - -# get target compile options -get_target_property(options_list mdbx COMPILE_OPTIONS) -if(options_list) - list(APPEND MDBX_BUILD_FLAGS ${options_list}) -endif() - -list(REMOVE_DUPLICATES MDBX_BUILD_FLAGS) -string(REPLACE ";" " " MDBX_BUILD_FLAGS "${MDBX_BUILD_FLAGS}") -if(CMAKE_CONFIGURATION_TYPES) - # add dynamic part via per-configuration define - message(STATUS "MDBX Compile Flags: ${MDBX_BUILD_FLAGS} ") - add_definitions(-DMDBX_BUILD_FLAGS_CONFIG="$<$:${CMAKE_C_FLAGS_DEBUG} ${CMAKE_C_DEFINES_DEBUG}>$<$:${CMAKE_C_FLAGS_RELEASE} ${CMAKE_C_DEFINES_RELEASE}>$<$:${CMAKE_C_FLAGS_RELWITHDEBINFO} ${CMAKE_C_DEFINES_RELWITHDEBINFO}>$<$:${CMAKE_C_FLAGS_MINSIZEREL} ${CMAKE_C_DEFINES_MINSIZEREL}>") -else() - message(STATUS "MDBX Compile Flags: ${MDBX_BUILD_FLAGS}") -endif() - -# get compiler info -execute_process(COMMAND sh -c "${CMAKE_C_COMPILER} --version | head -1" - OUTPUT_VARIABLE MDBX_BUILD_COMPILER - OUTPUT_STRIP_TRAILING_WHITESPACE - ERROR_QUIET - RESULT_VARIABLE rc) -if(rc OR NOT MDBX_BUILD_COMPILER) - string(STRIP "${CMAKE_C_COMPILER_ID}-${CMAKE_C_COMPILER_VERSION}" MDBX_BUILD_COMPILER) -endif() - -# make a build-target triplet -if(CMAKE_C_COMPILER_TARGET) - set(MDBX_BUILD_TARGET "${CMAKE_C_COMPILER_TARGET}") -elseif(CMAKE_C_PLATFORM_ID AND NOT CMAKE_C_PLATFORM_ID STREQUAL CMAKE_SYSTEM_NAME) - string(STRIP "${CMAKE_C_PLATFORM_ID}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -elseif(CMAKE_LIBRARY_ARCHITECTURE) - string(STRIP "${CMAKE_LIBRARY_ARCHITECTURE}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -elseif(CMAKE_GENERATOR_PLATFORM AND NOT CMAKE_C_PLATFORM_ID STREQUAL CMAKE_SYSTEM_NAME) - string(STRIP "${CMAKE_GENERATOR_PLATFORM}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -elseif(CMAKE_SYSTEM_ARCH) - string(STRIP "${CMAKE_SYSTEM_ARCH}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -else() - string(STRIP "${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}" MDBX_BUILD_TARGET) -endif() -if(CMAKE_CONFIGURATION_TYPES) - add_definitions(-DMDBX_BUILD_CONFIG="$") -else() - set(MDBX_BUILD_CONFIG ${CMAKE_BUILD_TYPE}) -endif() - -# options -string(TIMESTAMP MDBX_BUILD_TIMESTAMP UTC) -set(options VERSION C_COMPILER CXX_COMPILER) -foreach(item IN LISTS options) - if(DEFINED ${item}) - set(value "${${item}}") - elseif(DEFINED MDBX_${item}) - set(item MDBX_${item}) - set(value "${${item}}") - elseif(DEFINED CMAKE_${item}) - set(item CMAKE_${item}) - set(value "${${item}}") - else() - set(value "undefined") - endif() - message(STATUS "${item}: ${value}") -endforeach(item) - -# generate version and config files -configure_file("${CMAKE_CURRENT_SOURCE_DIR}/elements/version.c.in" - "${CMAKE_CURRENT_SOURCE_DIR}/elements/version.c" ESCAPE_QUOTES) - -file(SHA256 "${CMAKE_CURRENT_SOURCE_DIR}/elements/version.c" MDBX_SOURCERY_DIGEST) -string(MAKE_C_IDENTIFIER "${MDBX_GIT_DESCRIBE}" MDBX_SOURCERY_SUFFIX) -set(MDBX_BUILD_SOURCERY "${MDBX_SOURCERY_DIGEST}_${MDBX_SOURCERY_SUFFIX}") - -configure_file("${CMAKE_CURRENT_SOURCE_DIR}/elements/config.h.in" - "${CMAKE_CURRENT_SOURCE_DIR}/elements/config.h" ESCAPE_QUOTES) -add_definitions(-DMDBX_CONFIG_H="config.h") - -# installation -if(MDBX_BUILD_SHARED_LIBRARY) - if(CMAKE_VERSION VERSION_LESS 3.12) - install(TARGETS mdbx EXPORT libmdbx - RUNTIME - DESTINATION bin - COMPONENT runtime - LIBRARY - DESTINATION lib - COMPONENT runtime - OBJECTS - DESTINATION lib - COMPONENT devel - ARCHIVE - DESTINATION lib - COMPONENT devel - PUBLIC_HEADER - DESTINATION include - COMPONENT devel - INCLUDES - DESTINATION include - COMPONENT devel) - else() - install(TARGETS mdbx EXPORT libmdbx - RUNTIME - DESTINATION bin - COMPONENT runtime - LIBRARY - DESTINATION lib - COMPONENT runtime - NAMELINK_COMPONENT devel - OBJECTS - DESTINATION lib - COMPONENT devel - ARCHIVE - DESTINATION lib - COMPONENT devel - PUBLIC_HEADER - DESTINATION include - COMPONENT devel - INCLUDES - DESTINATION include - COMPONENT devel) - endif() -endif() - -add_subdirectory(tools) diff --git a/libs/libmdbx/src/src/alloy.c b/libs/libmdbx/src/src/alloy.c index befdf8be45..c2b512005d 100644 --- a/libs/libmdbx/src/src/alloy.c +++ b/libs/libmdbx/src/src/alloy.c @@ -11,15 +11,15 @@ * top-level directory of the distribution or, alternatively, at * . */ -#define MDBX_ALLOY 1 /* amalgamated build */ -#include "elements/internals.h" /* must be included first */ +#define MDBX_ALLOY 1 /* alloyed build */ +#include "internals.h" /* must be included first */ -#include "elements/core.c" -#include "elements/osal.c" -#include "elements/version.c" +#include "core.c" +#include "osal.c" +#include "version.c" #if defined(_WIN32) || defined(_WIN64) -#include "elements/lck-windows.c" +#include "lck-windows.c" #else -#include "elements/lck-posix.c" +#include "lck-posix.c" #endif diff --git a/libs/libmdbx/src/src/config.h.in b/libs/libmdbx/src/src/config.h.in new file mode 100644 index 0000000000..12f3dc635c --- /dev/null +++ b/libs/libmdbx/src/src/config.h.in @@ -0,0 +1,52 @@ +/* This is CMake-template for libmdbx's config.h + ******************************************************************************/ + +/* *INDENT-OFF* */ +/* clang-format off */ + +#cmakedefine LTO_ENABLED +#cmakedefine MDBX_USE_VALGRIND +#cmakedefine ENABLE_GPROF +#cmakedefine ENABLE_GCOV +#cmakedefine ENABLE_ASAN +#cmakedefine MDBX_FORCE_ASSERTIONS + +/* Common */ +#cmakedefine01 MDBX_TXN_CHECKOWNER +#cmakedefine MDBX_TXN_CHECKPID_AUTO +#ifndef MDBX_TXN_CHECKPID_AUTO +#cmakedefine01 MDBX_TXN_CHECKPID +#endif +#cmakedefine MDBX_LOCKING_AUTO +#ifndef MDBX_LOCKING_AUTO +#cmakedefine MDBX_LOCKING @MDBX_LOCKING@ +#endif +#cmakedefine MDBX_TRUST_RTC_AUTO +#ifndef MDBX_TRUST_RTC_AUTO +#cmakedefine01 MDBX_TRUST_RTC +#endif + +/* Windows */ +#cmakedefine01 MDBX_CONFIG_MANUAL_TLS_CALLBACK +#cmakedefine01 MDBX_AVOID_CRT + +/* MacOS & iOS */ +#cmakedefine01 MDBX_OSX_SPEED_INSTEADOF_DURABILITY + +/* POSIX */ +#cmakedefine01 MDBX_DISABLE_GNU_SOURCE +#cmakedefine MDBX_USE_OFDLOCKS_AUTO +#ifndef MDBX_USE_OFDLOCKS_AUTO +#cmakedefine01 MDBX_USE_OFDLOCKS +#endif + +/* Build Info */ +#cmakedefine MDBX_BUILD_TIMESTAMP "@MDBX_BUILD_TIMESTAMP@" +#cmakedefine MDBX_BUILD_TARGET "@MDBX_BUILD_TARGET@" +#cmakedefine MDBX_BUILD_TYPE "@MDBX_BUILD_TYPE@" +#cmakedefine MDBX_BUILD_COMPILER "@MDBX_BUILD_COMPILER@" +#cmakedefine MDBX_BUILD_FLAGS "@MDBX_BUILD_FLAGS@" +#cmakedefine MDBX_BUILD_SOURCERY @MDBX_BUILD_SOURCERY@ + +/* *INDENT-ON* */ +/* clang-format on */ diff --git a/libs/libmdbx/src/src/core.c b/libs/libmdbx/src/src/core.c new file mode 100644 index 0000000000..098da86f45 --- /dev/null +++ b/libs/libmdbx/src/src/core.c @@ -0,0 +1,18322 @@ +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * This code is derived from "LMDB engine" written by + * Howard Chu (Symas Corporation), which itself derived from btree.c + * written by Martin Hedenfalk. + * + * --- + * + * Portions Copyright 2011-2015 Howard Chu, Symas Corp. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + * + * --- + * + * Portions Copyright (c) 2009, 2010 Martin Hedenfalk + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ + +#include "internals.h" + +/*------------------------------------------------------------------------------ + * Internal inlines */ + +static __pure_function unsigned log2n(size_t value) { + assert(value > 0 && value < INT32_MAX && is_powerof2(value)); + assert((value & -(int32_t)value) == value); +#if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_ctzl) + return __builtin_ctzl(value); +#elif defined(_MSC_VER) + unsigned long index; + _BitScanForward(&index, (unsigned long)value); + return index; +#else + static const uint8_t debruijn_ctz32[32] = { + 0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8, + 31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9}; + return debruijn_ctz32[(uint32_t)(value * 0x077CB531u) >> 27]; +#endif +} + +/*------------------------------------------------------------------------------ + * Unaligned access */ + +static __pure_function __maybe_unused __always_inline unsigned +field_alignment(unsigned alignment_baseline, size_t field_offset) { + unsigned merge = alignment_baseline | (unsigned)field_offset; + return merge & -(int)merge; +} + +/* read-thunk for UB-sanitizer */ +static __pure_function __always_inline uint8_t +peek_u8(const uint8_t *const __restrict ptr) { + return *ptr; +} + +/* write-thunk for UB-sanitizer */ +static __always_inline void poke_u8(uint8_t *const __restrict ptr, + const uint8_t v) { + *ptr = v; +} + +static __pure_function __always_inline uint16_t +unaligned_peek_u16(const unsigned expected_alignment, const void *const ptr) { + assert((uintptr_t)ptr % expected_alignment == 0); + if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(uint16_t)) == 0) + return *(const uint16_t *)ptr; + else { + uint16_t v; + memcpy(&v, ptr, sizeof(v)); + return v; + } +} + +static __always_inline void +unaligned_poke_u16(const unsigned expected_alignment, + void *const __restrict ptr, const uint16_t v) { + assert((uintptr_t)ptr % expected_alignment == 0); + if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(v)) == 0) + *(uint16_t *)ptr = v; + else + memcpy(ptr, &v, sizeof(v)); +} + +static __pure_function __always_inline uint32_t unaligned_peek_u32( + const unsigned expected_alignment, const void *const __restrict ptr) { + assert((uintptr_t)ptr % expected_alignment == 0); + if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(uint32_t)) == 0) + return *(const uint32_t *)ptr; + else if ((expected_alignment % sizeof(uint16_t)) == 0) { + const uint16_t lo = + ((const uint16_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__]; + const uint16_t hi = + ((const uint16_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__]; + return lo | (uint32_t)hi << 16; + } else { + uint32_t v; + memcpy(&v, ptr, sizeof(v)); + return v; + } +} + +static __always_inline void +unaligned_poke_u32(const unsigned expected_alignment, + void *const __restrict ptr, const uint32_t v) { + assert((uintptr_t)ptr % expected_alignment == 0); + if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(v)) == 0) + *(uint32_t *)ptr = v; + else if ((expected_alignment % sizeof(uint16_t)) == 0) { + ((uint16_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__] = (uint16_t)v; + ((uint16_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__] = + (uint16_t)(v >> 16); + } else + memcpy(ptr, &v, sizeof(v)); +} + +static __pure_function __always_inline uint64_t unaligned_peek_u64( + const unsigned expected_alignment, const void *const __restrict ptr) { + assert((uintptr_t)ptr % expected_alignment == 0); + if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(uint64_t)) == 0) + return *(const uint64_t *)ptr; + else if ((expected_alignment % sizeof(uint32_t)) == 0) { + const uint32_t lo = + ((const uint32_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__]; + const uint32_t hi = + ((const uint32_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__]; + return lo | (uint64_t)hi << 32; + } else { + uint64_t v; + memcpy(&v, ptr, sizeof(v)); + return v; + } +} + +static __always_inline void +unaligned_poke_u64(const unsigned expected_alignment, + void *const __restrict ptr, const uint64_t v) { + assert((uintptr_t)ptr % expected_alignment == 0); + if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(v)) == 0) + *(uint64_t *)ptr = v; + else if ((expected_alignment % sizeof(uint32_t)) == 0) { + ((uint32_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__] = (uint32_t)v; + ((uint32_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__] = + (uint32_t)(v >> 32); + } else + memcpy(ptr, &v, sizeof(v)); +} + +#define UNALIGNED_PEEK_8(ptr, struct, field) \ + peek_u8((const uint8_t *)(ptr) + offsetof(struct, field)) +#define UNALIGNED_POKE_8(ptr, struct, field, value) \ + poke_u8((uint8_t *)(ptr) + offsetof(struct, field), value) + +#define UNALIGNED_PEEK_16(ptr, struct, field) \ + unaligned_peek_u16(1, (const char *)(ptr) + offsetof(struct, field)) +#define UNALIGNED_POKE_16(ptr, struct, field, value) \ + unaligned_poke_u16(1, (char *)(ptr) + offsetof(struct, field), value) + +#define UNALIGNED_PEEK_32(ptr, struct, field) \ + unaligned_peek_u32(1, (const char *)(ptr) + offsetof(struct, field)) +#define UNALIGNED_POKE_32(ptr, struct, field, value) \ + unaligned_poke_u32(1, (char *)(ptr) + offsetof(struct, field), value) + +#define UNALIGNED_PEEK_64(ptr, struct, field) \ + unaligned_peek_u64(1, (const char *)(ptr) + offsetof(struct, field)) +#define UNALIGNED_POKE_64(ptr, struct, field, value) \ + unaligned_poke_u64(1, (char *)(ptr) + offsetof(struct, field), value) + +/* Get the page number pointed to by a branch node */ +static __pure_function __always_inline pgno_t +node_pgno(const MDBX_node *const __restrict node) { + pgno_t pgno = UNALIGNED_PEEK_32(node, MDBX_node, mn_pgno32); + if (sizeof(pgno) > 4) + pgno |= ((uint64_t)UNALIGNED_PEEK_8(node, MDBX_node, mn_extra)) << 32; + return pgno; +} + +/* Set the page number in a branch node */ +static __always_inline void node_set_pgno(MDBX_node *const __restrict node, + pgno_t pgno) { + assert(pgno >= MIN_PAGENO && pgno <= MAX_PAGENO); + + UNALIGNED_POKE_32(node, MDBX_node, mn_pgno32, (uint32_t)pgno); + if (sizeof(pgno) > 4) + UNALIGNED_POKE_8(node, MDBX_node, mn_extra, + (uint8_t)((uint64_t)pgno >> 32)); +} + +/* Get the size of the data in a leaf node */ +static __pure_function __always_inline size_t +node_ds(const MDBX_node *const __restrict node) { + return UNALIGNED_PEEK_32(node, MDBX_node, mn_dsize); +} + +/* Set the size of the data for a leaf node */ +static __always_inline void node_set_ds(MDBX_node *const __restrict node, + size_t size) { + assert(size < INT_MAX); + UNALIGNED_POKE_32(node, MDBX_node, mn_dsize, (uint32_t)size); +} + +/* The size of a key in a node */ +static __pure_function __always_inline size_t +node_ks(const MDBX_node *const __restrict node) { + return UNALIGNED_PEEK_16(node, MDBX_node, mn_ksize); +} + +/* Set the size of the key for a leaf node */ +static __always_inline void node_set_ks(MDBX_node *const __restrict node, + size_t size) { + assert(size < INT16_MAX); + UNALIGNED_POKE_16(node, MDBX_node, mn_ksize, (uint16_t)size); +} + +static __pure_function __always_inline uint8_t +node_flags(const MDBX_node *const __restrict node) { + return UNALIGNED_PEEK_8(node, MDBX_node, mn_flags); +} + +static __always_inline void node_set_flags(MDBX_node *const __restrict node, + uint8_t flags) { + UNALIGNED_POKE_8(node, MDBX_node, mn_flags, flags); +} + +/* Size of the node header, excluding dynamic data at the end */ +#define NODESIZE offsetof(MDBX_node, mn_data) + +/* Address of the key for the node */ +static __pure_function __always_inline void * +node_key(const MDBX_node *const __restrict node) { + return (char *)node + NODESIZE; +} + +/* Address of the data for a node */ +static __pure_function __always_inline void * +node_data(const MDBX_node *const __restrict node) { + return (char *)node_key(node) + node_ks(node); +} + +/* Size of a node in a leaf page with a given key and data. + * This is node header plus key plus data size. */ +static __pure_function __always_inline size_t +node_size_len(const size_t key_len, const size_t value_len) { + return NODESIZE + EVEN(key_len + value_len); +} +static __pure_function __always_inline size_t node_size(const MDBX_val *key, + const MDBX_val *value) { + return node_size_len(key ? key->iov_len : 0, value ? value->iov_len : 0); +} + +static __pure_function __always_inline pgno_t +peek_pgno(const void *const __restrict ptr) { + if (sizeof(pgno_t) == sizeof(uint32_t)) + return (pgno_t)unaligned_peek_u32(1, ptr); + else if (sizeof(pgno_t) == sizeof(uint64_t)) + return (pgno_t)unaligned_peek_u64(1, ptr); + else { + pgno_t pgno; + memcpy(&pgno, ptr, sizeof(pgno)); + return pgno; + } +} + +static __always_inline void poke_pgno(void *const __restrict ptr, + const pgno_t pgno) { + if (sizeof(pgno) == sizeof(uint32_t)) + unaligned_poke_u32(1, ptr, pgno); + else if (sizeof(pgno) == sizeof(uint64_t)) + unaligned_poke_u64(1, ptr, pgno); + else + memcpy(ptr, &pgno, sizeof(pgno)); +} + +static __pure_function __always_inline pgno_t +node_largedata_pgno(const MDBX_node *const __restrict node) { + assert(node_flags(node) & F_BIGDATA); + return peek_pgno(node_data(node)); +} + +/*------------------------------------------------------------------------------ + * Key length limitation factors: + * + * - Branch-page must contain at least two (MDBX_MINKEYS) nodes, + * within each a key and a child page number. But we can't split a page if + * it contains less that 4 keys. Therefore, at least 3 branch-node should + * fit in the single branch-page: + * pageroom = pagesize - page_hdr_len; + * branch.maxnode = even_floor(pageroom / 3 - sizeof(indx_t)); + * branch.maxkey = branch.maxnode - node_hdr_len; + * + * - Leaf-node of non-dupsort database must fit into one leaf-page, + * where a value could be placed on a large/overflow page: + * leaf.maxnode = even_floor(pageroom - sizeof(indx_t)); + * leaf.maxkey = leaf.maxnode - node_hdr_len - sizeof(pgno_t); + * + * - SubDatabase-node must fit into one leaf-page: + * subdb.maxname = leaf.maxnode - node_hdr_len - sizeof(MDBX_db); + * + * - Dupsort values itself are a keys in a dupsort-subdb and couldn't be + * longer than the branch.maxkey. But dupsort node must fit into one + * leaf-page, since dupsort value couldn't be placed on a large/overflow + * page. + * + * - So, the simpliest solution is to use half of branch.maxkey as + * a common maxkey value. Nevertheless, the actual values of maxkey are: + * nondupsort.maxkey = even_floor(pageroom / 3) + * - sizeof(indx_t) - node_hdr_len; + * dupsort.maxkey(value) = min(nondupsort.maxkey, + * leaf.maxnode - even_ceil(length(value))); + */ + +#define PAGEROOM(pagesize) ((pagesize)-PAGEHDRSZ) +#define EVEN_FLOOR(n) ((n) & ~(size_t)1) +#define BRANCH_NODEMAX(pagesize) \ + (EVEN_FLOOR(PAGEROOM(pagesize) / (MDBX_MINKEYS * 2 - 1)) - sizeof(indx_t)) +#define LEAF_NODEMAX(pagesize) (PAGEROOM(pagesize) - sizeof(indx_t)) +#define MAX_GC1OVPAGE(pagesize) (PAGEROOM(pagesize) / sizeof(pgno_t) - 1) + +__cold int mdbx_env_get_maxkeysize(const MDBX_env *env) { + return mdbx_env_get_maxkeysize_ex(env, MDBX_DUPSORT); +} + +__cold int mdbx_env_get_maxkeysize_ex(const MDBX_env *env, unsigned flags) { + if (unlikely(!env || env->me_signature != MDBX_ME_SIGNATURE)) + return -1; + + return (int)mdbx_limits_keysize_max((intptr_t)env->me_psize, flags); +} + +__cold intptr_t mdbx_limits_keysize_max(intptr_t pagesize, unsigned flags) { + if (pagesize < 1) + pagesize = (intptr_t)mdbx_syspagesize(); + if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || + pagesize > (intptr_t)MAX_PAGESIZE || + !is_powerof2((size_t)pagesize))) + return -1; + + STATIC_ASSERT(BRANCH_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(pgno_t) >= 8); + STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(pgno_t) >= 8); + STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) - NODESIZE >= sizeof(MDBX_db)); + if (flags & MDBX_INTEGERKEY) + return 8 /* sizeof(uint64_t) */; + + STATIC_ASSERT(BRANCH_NODEMAX(MAX_PAGESIZE) - NODESIZE - sizeof(pgno_t) < + LEAF_NODEMAX(MAX_PAGESIZE) - NODESIZE - sizeof(MDBX_db)); + STATIC_ASSERT(BRANCH_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(pgno_t) < + LEAF_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(MDBX_db)); + if (flags & + (MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP)) + return BRANCH_NODEMAX(pagesize) - NODESIZE - sizeof(MDBX_db); + + return BRANCH_NODEMAX(pagesize) - NODESIZE - sizeof(pgno_t); +} + +__cold int mdbx_env_get_maxvalsize_ex(const MDBX_env *env, unsigned flags) { + if (unlikely(!env || env->me_signature != MDBX_ME_SIGNATURE)) + return -1; + + return (int)mdbx_limits_valsize_max((intptr_t)env->me_psize, flags); +} + +__cold intptr_t mdbx_limits_valsize_max(intptr_t pagesize, unsigned flags) { + if (pagesize < 1) + pagesize = (intptr_t)mdbx_syspagesize(); + if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || + pagesize > (intptr_t)MAX_PAGESIZE || + !is_powerof2((size_t)pagesize))) + return -1; + + if (flags & MDBX_INTEGERDUP) + return 8 /* sizeof(uint64_t) */; + + if (flags & + (MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP)) + return BRANCH_NODEMAX(pagesize) - NODESIZE; + + const unsigned page_ln2 = log2n(pagesize); + const size_t hard = 0x7FF00000ul; + const size_t hard_pages = hard >> page_ln2; + const size_t limit = (hard_pages < MDBX_DPL_TXNFULL) + ? hard + : ((size_t)MDBX_DPL_TXNFULL << page_ln2); + return (limit < MAX_MAPSIZE) ? limit / 2 : MAX_MAPSIZE / 2; +} + +/* Calculate the size of a leaf node. + * + * The size depends on the environment's page size; if a data item + * is too large it will be put onto an overflow page and the node + * size will only include the key and not the data. Sizes are always + * rounded up to an even number of bytes, to guarantee 2-byte alignment + * of the MDBX_node headers. */ +static __pure_function __always_inline size_t leaf_size(const MDBX_env *env, + const MDBX_val *key, + const MDBX_val *data) { + size_t node_bytes = node_size(key, data); + /* NOTE: The actual limit is LEAF_NODEMAX(env->me_psize), but it reasonable to + * use env->me_branch_nodemax (which is 3 times less) as the treshold because: + * - Large threshold implies that any insertion/update could result split + * a single leaf page to THREE, which requires TWO insertion into parent + * branch page, then could leads to split parent page and so on up to + * the root. Such double-splitting is complex, ie costly (in case simple + * clear implementation) either dangerous (in case high-optimized + * implementation). + * - This does not affect capabilities, i.e. it does not limit the maximum + * key size. + * - At a lower threshold, on average, the density of keys on leaf pages + * increases and the height of the tree decreases. Thus, this lead the + * less number of pages participating in the search, and the search + * speed increases. + * - On the other hand, there is no universal gold ratio here and with a + * smaller threshold, we will create more overflows/large pages, + * i.e. the database size will be larger as will the IOPS volume. + * + * So, the lower threshold is not a silver bullet, but it allow implementation + * to be much simple and robust, without adding a flaws. */ + if (node_bytes > env->me_branch_nodemax) { + /* put on overflow page */ + node_bytes = node_size(key, nullptr) + sizeof(pgno_t); + } + + return node_bytes + sizeof(indx_t); +} + +/* Calculate the size of a branch node. + * + * The size should depend on the environment's page size but since + * we currently don't support spilling large keys onto overflow + * pages, it's simply the size of the MDBX_node header plus the + * size of the key. Sizes are always rounded up to an even number + * of bytes, to guarantee 2-byte alignment of the MDBX_node headers. + * + * [in] env The environment handle. + * [in] key The key for the node. + * + * Returns The number of bytes needed to store the node. */ +static __pure_function __always_inline size_t branch_size(const MDBX_env *env, + const MDBX_val *key) { + /* Size of a node in a branch page with a given key. + * This is just the node header plus the key, there is no data. */ + size_t node_bytes = node_size(key, nullptr); + if (unlikely(node_bytes > env->me_branch_nodemax)) { + /* put on overflow page */ + /* not implemented */ + mdbx_assert_fail(env, "INDXSIZE(key) <= env->me_nodemax", __func__, + __LINE__); + node_bytes = node_size(key, nullptr) + sizeof(pgno_t); + } + + return node_bytes + sizeof(indx_t); +} + +/*----------------------------------------------------------------------------*/ + +static __pure_function __always_inline size_t pgno2bytes(const MDBX_env *env, + pgno_t pgno) { + mdbx_assert(env, (1u << env->me_psize2log) == env->me_psize); + return ((size_t)pgno) << env->me_psize2log; +} + +static __pure_function __always_inline MDBX_page *pgno2page(const MDBX_env *env, + pgno_t pgno) { + return (MDBX_page *)(env->me_map + pgno2bytes(env, pgno)); +} + +static __pure_function __always_inline pgno_t bytes2pgno(const MDBX_env *env, + size_t bytes) { + mdbx_assert(env, (env->me_psize >> env->me_psize2log) == 1); + return (pgno_t)(bytes >> env->me_psize2log); +} + +static __pure_function size_t pgno_align2os_bytes(const MDBX_env *env, + pgno_t pgno) { + return ceil_powerof2(pgno2bytes(env, pgno), env->me_os_psize); +} + +static __pure_function pgno_t pgno_align2os_pgno(const MDBX_env *env, + pgno_t pgno) { + return bytes2pgno(env, pgno_align2os_bytes(env, pgno)); +} + +static __pure_function size_t bytes_align2os_bytes(const MDBX_env *env, + size_t bytes) { + return ceil_powerof2(ceil_powerof2(bytes, env->me_psize), env->me_os_psize); +} + +/* Address of first usable data byte in a page, after the header */ +static __pure_function __always_inline void *page_data(const MDBX_page *mp) { + return (char *)mp + PAGEHDRSZ; +} + +static __pure_function __always_inline const MDBX_page * +data_page(const void *data) { + return container_of(data, MDBX_page, mp_ptrs); +} + +static __pure_function __always_inline MDBX_meta *page_meta(MDBX_page *mp) { + return (MDBX_meta *)page_data(mp); +} + +/* Number of nodes on a page */ +static __pure_function __always_inline unsigned +page_numkeys(const MDBX_page *mp) { + return mp->mp_lower >> 1; +} + +/* The amount of space remaining in the page */ +static __pure_function __always_inline unsigned page_room(const MDBX_page *mp) { + return mp->mp_upper - mp->mp_lower; +} + +static __pure_function __always_inline unsigned +page_space(const MDBX_env *env) { + STATIC_ASSERT(PAGEHDRSZ % 2 == 0); + return env->me_psize - PAGEHDRSZ; +} + +static __pure_function __always_inline unsigned page_used(const MDBX_env *env, + const MDBX_page *mp) { + return page_space(env) - page_room(mp); +} + +/* The percentage of space used in the page, in a percents. */ +static __pure_function __maybe_unused __inline double +page_fill(const MDBX_env *env, const MDBX_page *mp) { + return page_used(env, mp) * 100.0 / page_space(env); +} + +static __pure_function __inline bool +page_fill_enough(const MDBX_page *mp, unsigned spaceleft_threshold, + unsigned minkeys_threshold) { + return page_room(mp) < spaceleft_threshold && + page_numkeys(mp) >= minkeys_threshold; +} + +/* The number of overflow pages needed to store the given size. */ +static __pure_function __always_inline pgno_t +number_of_ovpages(const MDBX_env *env, size_t bytes) { + return bytes2pgno(env, PAGEHDRSZ - 1 + bytes) + 1; +} + +/* Address of node i in page p */ +static __pure_function __always_inline MDBX_node *page_node(const MDBX_page *mp, + unsigned i) { + assert((mp->mp_flags & (P_LEAF2 | P_OVERFLOW | P_META)) == 0); + assert(page_numkeys(mp) > (unsigned)(i)); + assert(mp->mp_ptrs[i] % 2 == 0); + return (MDBX_node *)((char *)mp + mp->mp_ptrs[i] + PAGEHDRSZ); +} + +/* The address of a key in a LEAF2 page. + * LEAF2 pages are used for MDBX_DUPFIXED sorted-duplicate sub-DBs. + * There are no node headers, keys are stored contiguously. */ +static __pure_function __always_inline void * +page_leaf2key(const MDBX_page *mp, unsigned i, size_t keysize) { + assert(mp->mp_leaf2_ksize == keysize); + (void)keysize; + return (char *)mp + PAGEHDRSZ + (i * mp->mp_leaf2_ksize); +} + +/* Set the node's key into keyptr. */ +static __always_inline void get_key(const MDBX_node *node, MDBX_val *keyptr) { + keyptr->iov_len = node_ks(node); + keyptr->iov_base = node_key(node); +} + +/* Set the node's key into keyptr, if requested. */ +static __always_inline void +get_key_optional(const MDBX_node *node, MDBX_val *keyptr /* __may_null */) { + if (keyptr) + get_key(node, keyptr); +} + +/*------------------------------------------------------------------------------ + * Workaround for mmaped-lookahead-cross-page-boundary bug + * in an obsolete versions of Elbrus's libc and kernels. */ +#if defined(__e2k__) && defined(MDBX_E2K_MLHCPB_WORKAROUND) && \ + MDBX_E2K_MLHCPB_WORKAROUND +int __hot mdbx_e2k_memcmp_bug_workaround(const void *s1, const void *s2, + size_t n) { + if (unlikely(n > 42 + /* LY: align followed access if reasonable possible */ + && (((uintptr_t)s1) & 7) != 0 && + (((uintptr_t)s1) & 7) == (((uintptr_t)s2) & 7))) { + if (((uintptr_t)s1) & 1) { + const int diff = *(uint8_t *)s1 - *(uint8_t *)s2; + if (diff) + return diff; + s1 = (char *)s1 + 1; + s2 = (char *)s2 + 1; + n -= 1; + } + + if (((uintptr_t)s1) & 2) { + const uint16_t a = *(uint16_t *)s1; + const uint16_t b = *(uint16_t *)s2; + if (likely(a != b)) + return (__builtin_bswap16(a) > __builtin_bswap16(b)) ? 1 : -1; + s1 = (char *)s1 + 2; + s2 = (char *)s2 + 2; + n -= 2; + } + + if (((uintptr_t)s1) & 4) { + const uint32_t a = *(uint32_t *)s1; + const uint32_t b = *(uint32_t *)s2; + if (likely(a != b)) + return (__builtin_bswap32(a) > __builtin_bswap32(b)) ? 1 : -1; + s1 = (char *)s1 + 4; + s2 = (char *)s2 + 4; + n -= 4; + } + } + + while (n >= 8) { + const uint64_t a = *(uint64_t *)s1; + const uint64_t b = *(uint64_t *)s2; + if (likely(a != b)) + return (__builtin_bswap64(a) > __builtin_bswap64(b)) ? 1 : -1; + s1 = (char *)s1 + 8; + s2 = (char *)s2 + 8; + n -= 8; + } + + if (n & 4) { + const uint32_t a = *(uint32_t *)s1; + const uint32_t b = *(uint32_t *)s2; + if (likely(a != b)) + return (__builtin_bswap32(a) > __builtin_bswap32(b)) ? 1 : -1; + s1 = (char *)s1 + 4; + s2 = (char *)s2 + 4; + } + + if (n & 2) { + const uint16_t a = *(uint16_t *)s1; + const uint16_t b = *(uint16_t *)s2; + if (likely(a != b)) + return (__builtin_bswap16(a) > __builtin_bswap16(b)) ? 1 : -1; + s1 = (char *)s1 + 2; + s2 = (char *)s2 + 2; + } + + return (n & 1) ? *(uint8_t *)s1 - *(uint8_t *)s2 : 0; +} + +int __hot mdbx_e2k_strcmp_bug_workaround(const char *s1, const char *s2) { + while (true) { + int diff = *(uint8_t *)s1 - *(uint8_t *)s2; + if (likely(diff != 0) || *s1 == '\0') + return diff; + s1 += 1; + s2 += 1; + } +} + +int __hot mdbx_e2k_strncmp_bug_workaround(const char *s1, const char *s2, + size_t n) { + while (n > 0) { + int diff = *(uint8_t *)s1 - *(uint8_t *)s2; + if (likely(diff != 0) || *s1 == '\0') + return diff; + s1 += 1; + s2 += 1; + n -= 1; + } + return 0; +} + +size_t __hot mdbx_e2k_strlen_bug_workaround(const char *s) { + size_t n = 0; + while (*s) { + s += 1; + n += 1; + } + return n; +} + +size_t __hot mdbx_e2k_strnlen_bug_workaround(const char *s, size_t maxlen) { + size_t n = 0; + while (maxlen > n && *s) { + s += 1; + n += 1; + } + return n; +} +#endif /* MDBX_E2K_MLHCPB_WORKAROUND */ + +/*------------------------------------------------------------------------------ + * safe read/write volatile 64-bit fields on 32-bit architectures. */ + +static __always_inline void atomic_yield(void) { +#if defined(_WIN32) || defined(_WIN64) + YieldProcessor(); +#elif defined(__x86_64__) || defined(__i386__) || defined(__e2k__) + __builtin_ia32_pause(); +#elif defined(__ia64__) +#if defined(__HP_cc__) || defined(__HP_aCC__) + _Asm_hint(_HINT_PAUSE); +#else + __asm__ __volatile__("hint @pause"); +#endif +#elif defined(__arm__) || defined(__aarch64__) +#ifdef __CC_ARM + __yield(); +#else + __asm__ __volatile__("yield"); +#endif +#elif (defined(__mips64) || defined(__mips64__)) && defined(__mips_isa_rev) && \ + __mips_isa_rev >= 2 + __asm__ __volatile__("pause"); +#elif defined(__mips) || defined(__mips__) || defined(__mips64) || \ + defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ + defined(__MWERKS__) || defined(__sgi) + __asm__ __volatile__(".word 0x00000140"); +#else + pthread_yield(); +#endif +} + +#if MDBX_64BIT_CAS +static __always_inline bool atomic_cas64(volatile uint64_t *p, uint64_t c, + uint64_t v) { +#if defined(ATOMIC_VAR_INIT) || defined(ATOMIC_LLONG_LOCK_FREE) + STATIC_ASSERT(sizeof(long long) >= sizeof(uint64_t)); +#ifndef __COVERITY__ + STATIC_ASSERT(atomic_is_lock_free(p)); +#endif /* Workaround for Coverity */ + return atomic_compare_exchange_strong((_Atomic uint64_t *)p, &c, v); +#elif defined(__GNUC__) || defined(__clang__) + return __sync_bool_compare_and_swap(p, c, v); +#elif defined(_MSC_VER) + return c == + (uint64_t)_InterlockedCompareExchange64((volatile int64_t *)p, v, c); +#elif defined(__APPLE__) + return OSAtomicCompareAndSwap64Barrier(c, v, (volatile uint64_t *)p); +#else +#error FIXME: Unsupported compiler +#endif +} +#endif /* MDBX_64BIT_CAS */ + +static __always_inline bool atomic_cas32(volatile uint32_t *p, uint32_t c, + uint32_t v) { +#if defined(ATOMIC_VAR_INIT) || defined(ATOMIC_INT_LOCK_FREE) + STATIC_ASSERT(sizeof(int) >= sizeof(uint32_t)); +#ifndef __COVERITY__ + STATIC_ASSERT(atomic_is_lock_free(p)); +#endif /* Workaround for Coverity */ + return atomic_compare_exchange_strong((_Atomic uint32_t *)p, &c, v); +#elif defined(__GNUC__) || defined(__clang__) + return __sync_bool_compare_and_swap(p, c, v); +#elif defined(_MSC_VER) + STATIC_ASSERT(sizeof(volatile long) == sizeof(volatile uint32_t)); + return c == (uint32_t)_InterlockedCompareExchange((volatile long *)p, v, c); +#elif defined(__APPLE__) + return OSAtomicCompareAndSwap32Barrier(c, v, (volatile int32_t *)p); +#else +#error FIXME: Unsupported compiler +#endif +} + +static __always_inline uint32_t atomic_add32(volatile uint32_t *p, uint32_t v) { +#if defined(ATOMIC_VAR_INIT) || defined(ATOMIC_INT_LOCK_FREE) + STATIC_ASSERT(sizeof(int) >= sizeof(uint32_t)); +#ifndef __COVERITY__ + STATIC_ASSERT(atomic_is_lock_free(p)); +#endif /* Workaround for Coverity */ + return atomic_fetch_add((_Atomic uint32_t *)p, v); +#elif defined(__GNUC__) || defined(__clang__) + return __sync_fetch_and_add(p, v); +#elif defined(_MSC_VER) + STATIC_ASSERT(sizeof(volatile long) == sizeof(volatile uint32_t)); + return _InterlockedExchangeAdd((volatile long *)p, v); +#elif defined(__APPLE__) + return OSAtomicAdd32Barrier(v, (volatile int32_t *)p); +#else +#error FIXME: Unsupported compiler +#endif +} + +#define atomic_sub32(p, v) atomic_add32(p, 0 - (v)) + +static __maybe_unused __always_inline bool safe64_is_valid(uint64_t v) { +#if MDBX_WORDBITS >= 64 + return v < SAFE64_INVALID_THRESHOLD; +#else + return (v >> 32) != UINT32_MAX; +#endif /* MDBX_WORDBITS */ +} + +static __maybe_unused __always_inline bool +safe64_is_valid_ptr(const mdbx_safe64_t *ptr) { + mdbx_compiler_barrier(); +#if MDBX_64BIT_ATOMIC + return ptr->atomic < SAFE64_INVALID_THRESHOLD; +#else + return ptr->high != UINT32_MAX; +#endif /* MDBX_64BIT_ATOMIC */ +} + +static __always_inline uint64_t safe64_txnid_next(uint64_t txnid) { + txnid += MDBX_TXNID_STEP; +#if !MDBX_64BIT_CAS + /* avoid overflow of low-part in safe64_reset() */ + txnid += (UINT32_MAX == (uint32_t)txnid); +#endif + return txnid; +} + +static __always_inline void safe64_reset(mdbx_safe64_t *ptr, + bool single_writer) { + mdbx_compiler_barrier(); +#if !MDBX_64BIT_CAS + if (!single_writer) { + STATIC_ASSERT(MDBX_TXNID_STEP > 1); + /* it is safe to increment low-part to avoid ABA, since MDBX_TXNID_STEP > 1 + * and overflow was preserved in safe64_txnid_next() */ + atomic_add32(&ptr->low, 1) /* avoid ABA in safe64_reset_compare() */; + ptr->high = UINT32_MAX /* atomically make >= SAFE64_INVALID_THRESHOLD */; + atomic_add32(&ptr->low, 1) /* avoid ABA in safe64_reset_compare() */; + } else +#else + (void)single_writer; +#endif /* !MDBX_64BIT_CAS */ +#if MDBX_64BIT_ATOMIC + ptr->atomic = UINT64_MAX; +#else + /* atomically make value >= SAFE64_INVALID_THRESHOLD */ + ptr->high = UINT32_MAX; +#endif /* MDBX_64BIT_ATOMIC */ + assert(ptr->inconsistent >= SAFE64_INVALID_THRESHOLD); + mdbx_flush_incoherent_cpu_writeback(); + mdbx_jitter4testing(true); +} + +static __always_inline bool safe64_reset_compare(mdbx_safe64_t *ptr, + txnid_t compare) { + mdbx_compiler_barrier(); + /* LY: This function is used to reset `mr_txnid` from OOM-kick in case + * the asynchronously cancellation of read transaction. Therefore, + * there may be a collision between the cleanup performed here and + * asynchronous termination and restarting of the read transaction + * in another proces/thread. In general we MUST NOT reset the `mr_txnid` + * if a new transaction was started (i.e. if `mr_txnid` was changed). */ +#if MDBX_64BIT_CAS + bool rc = atomic_cas64(&ptr->inconsistent, compare, UINT64_MAX); + mdbx_flush_incoherent_cpu_writeback(); +#else + /* LY: There is no gold ratio here since shared mutex is too costly, + * in such way we must acquire/release it for every update of mr_txnid, + * i.e. twice for each read transaction). */ + bool rc = false; + if (likely(ptr->low == (uint32_t)compare && + atomic_cas32(&ptr->high, (uint32_t)(compare >> 32), UINT32_MAX))) { + if (unlikely(ptr->low != (uint32_t)compare)) + atomic_cas32(&ptr->high, UINT32_MAX, (uint32_t)(compare >> 32)); + else + rc = true; + } +#endif /* MDBX_64BIT_CAS */ + mdbx_jitter4testing(true); + return rc; +} + +static __always_inline void safe64_write(mdbx_safe64_t *ptr, const uint64_t v) { + mdbx_compiler_barrier(); + assert(ptr->inconsistent >= SAFE64_INVALID_THRESHOLD); +#if MDBX_64BIT_ATOMIC + ptr->atomic = v; +#else /* MDBX_64BIT_ATOMIC */ + /* update low-part but still value >= SAFE64_INVALID_THRESHOLD */ + ptr->low = (uint32_t)v; + assert(ptr->inconsistent >= SAFE64_INVALID_THRESHOLD); + mdbx_flush_incoherent_cpu_writeback(); + mdbx_jitter4testing(true); + /* update high-part from SAFE64_INVALID_THRESHOLD to actual value */ + ptr->high = (uint32_t)(v >> 32); +#endif /* MDBX_64BIT_ATOMIC */ + assert(ptr->inconsistent == v); + mdbx_flush_incoherent_cpu_writeback(); + mdbx_jitter4testing(true); +} + +static __always_inline uint64_t safe64_read(const mdbx_safe64_t *ptr) { + mdbx_compiler_barrier(); + mdbx_jitter4testing(true); + uint64_t v; +#if MDBX_64BIT_ATOMIC + v = ptr->atomic; +#else /* MDBX_64BIT_ATOMIC */ + uint32_t hi, lo; + do { + hi = ptr->high; + mdbx_compiler_barrier(); + mdbx_jitter4testing(true); + lo = ptr->low; + mdbx_compiler_barrier(); + mdbx_jitter4testing(true); + } while (unlikely(hi != ptr->high)); + v = lo | (uint64_t)hi << 32; +#endif /* MDBX_64BIT_ATOMIC */ + mdbx_jitter4testing(true); + return v; +} + +static __always_inline void safe64_update(mdbx_safe64_t *ptr, + const uint64_t v) { + safe64_reset(ptr, true); + safe64_write(ptr, v); +} + +/*----------------------------------------------------------------------------*/ +/* rthc (tls keys and destructors) */ + +typedef struct rthc_entry_t { + MDBX_reader *begin; + MDBX_reader *end; + mdbx_thread_key_t thr_tls_key; + bool key_valid; +} rthc_entry_t; + +#if MDBX_DEBUG +#define RTHC_INITIAL_LIMIT 1 +#else +#define RTHC_INITIAL_LIMIT 16 +#endif + +static bin128_t bootid; + +#if defined(_WIN32) || defined(_WIN64) +static CRITICAL_SECTION rthc_critical_section; +static CRITICAL_SECTION lcklist_critical_section; +#else +int __cxa_thread_atexit_impl(void (*dtor)(void *), void *obj, void *dso_symbol) + __attribute__((__weak__)); +#ifdef __APPLE__ /* FIXME: Thread-Local Storage destructors & DSO-unloading */ +int __cxa_thread_atexit_impl(void (*dtor)(void *), void *obj, + void *dso_symbol) { + (void)dtor; + (void)obj; + (void)dso_symbol; + return -1; +} +#endif /* __APPLE__ */ + +static pthread_mutex_t lcklist_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_mutex_t rthc_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t rthc_cond = PTHREAD_COND_INITIALIZER; +static mdbx_thread_key_t rthc_key; +static volatile uint32_t rthc_pending; + +static void __cold workaround_glibc_bug21031(void) { + /* Workaround for https://sourceware.org/bugzilla/show_bug.cgi?id=21031 + * + * Due race between pthread_key_delete() and __nptl_deallocate_tsd() + * The destructor(s) of thread-local-storate object(s) may be running + * in another thread(s) and be blocked or not finished yet. + * In such case we get a SEGFAULT after unload this library DSO. + * + * So just by yielding a few timeslices we give a chance + * to such destructor(s) for completion and avoids segfault. */ + sched_yield(); + sched_yield(); + sched_yield(); +} +#endif + +static unsigned rthc_count, rthc_limit; +static rthc_entry_t *rthc_table; +static rthc_entry_t rthc_table_static[RTHC_INITIAL_LIMIT]; + +static __inline void rthc_lock(void) { +#if defined(_WIN32) || defined(_WIN64) + EnterCriticalSection(&rthc_critical_section); +#else + mdbx_ensure(nullptr, pthread_mutex_lock(&rthc_mutex) == 0); +#endif +} + +static __inline void rthc_unlock(void) { +#if defined(_WIN32) || defined(_WIN64) + LeaveCriticalSection(&rthc_critical_section); +#else + mdbx_ensure(nullptr, pthread_mutex_unlock(&rthc_mutex) == 0); +#endif +} + +static __inline int thread_key_create(mdbx_thread_key_t *key) { + int rc; +#if defined(_WIN32) || defined(_WIN64) + *key = TlsAlloc(); + rc = (*key != TLS_OUT_OF_INDEXES) ? MDBX_SUCCESS : GetLastError(); +#else + rc = pthread_key_create(key, nullptr); +#endif + mdbx_trace("&key = %p, value %" PRIuPTR ", rc %d", + __Wpedantic_format_voidptr(key), (uintptr_t)*key, rc); + return rc; +} + +static __inline void thread_key_delete(mdbx_thread_key_t key) { + mdbx_trace("key = %" PRIuPTR, (uintptr_t)key); +#if defined(_WIN32) || defined(_WIN64) + mdbx_ensure(nullptr, TlsFree(key)); +#else + mdbx_ensure(nullptr, pthread_key_delete(key) == 0); + workaround_glibc_bug21031(); +#endif +} + +static __inline void *thread_rthc_get(mdbx_thread_key_t key) { +#if defined(_WIN32) || defined(_WIN64) + return TlsGetValue(key); +#else + return pthread_getspecific(key); +#endif +} + +static void thread_rthc_set(mdbx_thread_key_t key, const void *value) { +#if defined(_WIN32) || defined(_WIN64) + mdbx_ensure(nullptr, TlsSetValue(key, (void *)value)); +#else +#define MDBX_THREAD_RTHC_ZERO 0 +#define MDBX_THREAD_RTHC_REGISTERD 1 +#define MDBX_THREAD_RTHC_COUNTED 2 + static __thread uint32_t thread_registration_state; + if (value && unlikely(thread_registration_state == MDBX_THREAD_RTHC_ZERO)) { + thread_registration_state = MDBX_THREAD_RTHC_REGISTERD; + mdbx_trace("thread registered 0x%" PRIxPTR, mdbx_thread_self()); + if (&__cxa_thread_atexit_impl == nullptr || + __cxa_thread_atexit_impl(mdbx_rthc_thread_dtor, + &thread_registration_state, + (void *)&mdbx_version /* dso_anchor */)) { + mdbx_ensure(nullptr, pthread_setspecific( + rthc_key, &thread_registration_state) == 0); + thread_registration_state = MDBX_THREAD_RTHC_COUNTED; + const unsigned count_before = atomic_add32(&rthc_pending, 1); + mdbx_ensure(nullptr, count_before < INT_MAX); + mdbx_trace("fallback to pthreads' tsd, key %" PRIuPTR ", count %u", + (uintptr_t)rthc_key, count_before); + (void)count_before; + } + } + mdbx_ensure(nullptr, pthread_setspecific(key, value) == 0); +#endif +} + +__cold void mdbx_rthc_global_init(void) { + rthc_limit = RTHC_INITIAL_LIMIT; + rthc_table = rthc_table_static; +#if defined(_WIN32) || defined(_WIN64) + InitializeCriticalSection(&rthc_critical_section); + InitializeCriticalSection(&lcklist_critical_section); +#else + mdbx_ensure(nullptr, + pthread_key_create(&rthc_key, mdbx_rthc_thread_dtor) == 0); + mdbx_trace("pid %d, &mdbx_rthc_key = %p, value 0x%x", mdbx_getpid(), + __Wpedantic_format_voidptr(&rthc_key), (unsigned)rthc_key); +#endif + /* checking time conversion, this also avoids racing on 32-bit architectures + * during writing calculated 64-bit ratio(s) into memory. */ + uint32_t proba = UINT32_MAX; + while (true) { + unsigned time_conversion_checkup = + mdbx_osal_monotime_to_16dot16(mdbx_osal_16dot16_to_monotime(proba)); + unsigned one_more = (proba < UINT32_MAX) ? proba + 1 : proba; + unsigned one_less = (proba > 0) ? proba - 1 : proba; + mdbx_ensure(nullptr, time_conversion_checkup >= one_less && + time_conversion_checkup <= one_more); + if (proba == 0) + break; + proba >>= 1; + } + + bootid = mdbx_osal_bootid(); +} + +/* dtor called for thread, i.e. for all mdbx's environment objects */ +__cold void mdbx_rthc_thread_dtor(void *ptr) { + rthc_lock(); + mdbx_trace(">> pid %d, thread 0x%" PRIxPTR ", rthc %p", mdbx_getpid(), + mdbx_thread_self(), ptr); + + const uint32_t self_pid = mdbx_getpid(); + for (unsigned i = 0; i < rthc_count; ++i) { + if (!rthc_table[i].key_valid) + continue; + const mdbx_thread_key_t key = rthc_table[i].thr_tls_key; + MDBX_reader *const rthc = thread_rthc_get(key); + if (rthc < rthc_table[i].begin || rthc >= rthc_table[i].end) + continue; +#if !defined(_WIN32) && !defined(_WIN64) + if (pthread_setspecific(key, nullptr) != 0) { + mdbx_trace("== thread 0x%" PRIxPTR + ", rthc %p: ignore race with tsd-key deletion", + mdbx_thread_self(), ptr); + continue /* ignore race with tsd-key deletion by mdbx_env_close() */; + } +#endif + + mdbx_trace("== thread 0x%" PRIxPTR + ", rthc %p, [%i], %p ... %p (%+i), rtch-pid %i, " + "current-pid %i", + mdbx_thread_self(), __Wpedantic_format_voidptr(rthc), i, + __Wpedantic_format_voidptr(rthc_table[i].begin), + __Wpedantic_format_voidptr(rthc_table[i].end), + (int)(rthc - rthc_table[i].begin), rthc->mr_pid, self_pid); + if (rthc->mr_pid == self_pid) { + mdbx_trace("==== thread 0x%" PRIxPTR ", rthc %p, cleanup", + mdbx_thread_self(), __Wpedantic_format_voidptr(rthc)); + rthc->mr_pid = 0; + } + } + +#if defined(_WIN32) || defined(_WIN64) + mdbx_trace("<< thread 0x%" PRIxPTR ", rthc %p", mdbx_thread_self(), ptr); + rthc_unlock(); +#else + const char self_registration = *(char *)ptr; + *(char *)ptr = MDBX_THREAD_RTHC_ZERO; + mdbx_trace("== thread 0x%" PRIxPTR ", rthc %p, pid %d, self-status %d", + mdbx_thread_self(), ptr, mdbx_getpid(), self_registration); + if (self_registration == MDBX_THREAD_RTHC_COUNTED) + mdbx_ensure(nullptr, atomic_sub32(&rthc_pending, 1) > 0); + + if (rthc_pending == 0) { + mdbx_trace("== thread 0x%" PRIxPTR ", rthc %p, pid %d, wake", + mdbx_thread_self(), ptr, mdbx_getpid()); + mdbx_ensure(nullptr, pthread_cond_broadcast(&rthc_cond) == 0); + } + + mdbx_trace("<< thread 0x%" PRIxPTR ", rthc %p", mdbx_thread_self(), ptr); + /* Allow tail call optimization, i.e. gcc should generate the jmp instruction + * instead of a call for pthread_mutex_unlock() and therefore CPU could not + * return to current DSO's code section, which may be unloaded immediately + * after the mutex got released. */ + pthread_mutex_unlock(&rthc_mutex); +#endif +} + +__cold void mdbx_rthc_global_dtor(void) { + mdbx_trace(">> pid %d", mdbx_getpid()); + + rthc_lock(); +#if !defined(_WIN32) && !defined(_WIN64) + char *rthc = (char *)pthread_getspecific(rthc_key); + mdbx_trace("== thread 0x%" PRIxPTR ", rthc %p, pid %d, self-status %d", + mdbx_thread_self(), __Wpedantic_format_voidptr(rthc), + mdbx_getpid(), rthc ? *rthc : -1); + if (rthc) { + const char self_registration = *(char *)rthc; + *rthc = MDBX_THREAD_RTHC_ZERO; + if (self_registration == MDBX_THREAD_RTHC_COUNTED) + mdbx_ensure(nullptr, atomic_sub32(&rthc_pending, 1) > 0); + } + + struct timespec abstime; + mdbx_ensure(nullptr, clock_gettime(CLOCK_REALTIME, &abstime) == 0); + abstime.tv_nsec += 1000000000l / 10; + if (abstime.tv_nsec >= 1000000000l) { + abstime.tv_nsec -= 1000000000l; + abstime.tv_sec += 1; + } +#if MDBX_DEBUG > 0 + abstime.tv_sec += 600; +#endif + + for (unsigned left; (left = rthc_pending) > 0;) { + mdbx_trace("pid %d, pending %u, wait for...", mdbx_getpid(), left); + const int rc = pthread_cond_timedwait(&rthc_cond, &rthc_mutex, &abstime); + if (rc && rc != EINTR) + break; + } + thread_key_delete(rthc_key); +#endif + + const uint32_t self_pid = mdbx_getpid(); + for (unsigned i = 0; i < rthc_count; ++i) { + if (!rthc_table[i].key_valid) + continue; + const mdbx_thread_key_t key = rthc_table[i].thr_tls_key; + thread_key_delete(key); + for (MDBX_reader *rthc = rthc_table[i].begin; rthc < rthc_table[i].end; + ++rthc) { + mdbx_trace("== [%i] = key %" PRIuPTR ", %p ... %p, rthc %p (%+i), " + "rthc-pid %i, current-pid %i", + i, (uintptr_t)key, + __Wpedantic_format_voidptr(rthc_table[i].begin), + __Wpedantic_format_voidptr(rthc_table[i].end), + __Wpedantic_format_voidptr(rthc), + (int)(rthc - rthc_table[i].begin), rthc->mr_pid, self_pid); + if (rthc->mr_pid == self_pid) { + rthc->mr_pid = 0; + mdbx_trace("== cleanup %p", __Wpedantic_format_voidptr(rthc)); + } + } + } + + rthc_limit = rthc_count = 0; + if (rthc_table != rthc_table_static) + mdbx_free(rthc_table); + rthc_table = nullptr; + rthc_unlock(); + +#if defined(_WIN32) || defined(_WIN64) + DeleteCriticalSection(&lcklist_critical_section); + DeleteCriticalSection(&rthc_critical_section); +#else + /* LY: yielding a few timeslices to give a more chance + * to racing destructor(s) for completion. */ + workaround_glibc_bug21031(); +#endif + + mdbx_trace("<< pid %d\n", mdbx_getpid()); +} + +__cold int mdbx_rthc_alloc(mdbx_thread_key_t *key, MDBX_reader *begin, + MDBX_reader *end) { + int rc; + if (key) { +#ifndef NDEBUG + *key = (mdbx_thread_key_t)0xBADBADBAD; +#endif /* NDEBUG */ + rc = thread_key_create(key); + if (rc != MDBX_SUCCESS) + return rc; + } + + rthc_lock(); + const mdbx_thread_key_t new_key = key ? *key : 0; + mdbx_trace(">> key %" PRIuPTR ", rthc_count %u, rthc_limit %u", + (uintptr_t)new_key, rthc_count, rthc_limit); + if (rthc_count == rthc_limit) { + rthc_entry_t *new_table = + mdbx_realloc((rthc_table == rthc_table_static) ? nullptr : rthc_table, + sizeof(rthc_entry_t) * rthc_limit * 2); + if (new_table == nullptr) { + rc = MDBX_ENOMEM; + goto bailout; + } + if (rthc_table == rthc_table_static) + memcpy(new_table, rthc_table_static, sizeof(rthc_table_static)); + rthc_table = new_table; + rthc_limit *= 2; + } + mdbx_trace("== [%i] = key %" PRIuPTR ", %p ... %p", rthc_count, + (uintptr_t)new_key, __Wpedantic_format_voidptr(begin), + __Wpedantic_format_voidptr(end)); + rthc_table[rthc_count].key_valid = key ? true : false; + rthc_table[rthc_count].thr_tls_key = key ? new_key : 0; + rthc_table[rthc_count].begin = begin; + rthc_table[rthc_count].end = end; + ++rthc_count; + mdbx_trace("<< key %" PRIuPTR ", rthc_count %u, rthc_limit %u", + (uintptr_t)new_key, rthc_count, rthc_limit); + rthc_unlock(); + return MDBX_SUCCESS; + +bailout: + if (key) + thread_key_delete(*key); + rthc_unlock(); + return rc; +} + +__cold void mdbx_rthc_remove(const mdbx_thread_key_t key) { + thread_key_delete(key); + rthc_lock(); + mdbx_trace(">> key %zu, rthc_count %u, rthc_limit %u", (size_t)key, + rthc_count, rthc_limit); + + for (unsigned i = 0; i < rthc_count; ++i) { + if (rthc_table[i].key_valid && key == rthc_table[i].thr_tls_key) { + const uint32_t self_pid = mdbx_getpid(); + mdbx_trace("== [%i], %p ...%p, current-pid %d", i, + __Wpedantic_format_voidptr(rthc_table[i].begin), + __Wpedantic_format_voidptr(rthc_table[i].end), self_pid); + + for (MDBX_reader *rthc = rthc_table[i].begin; rthc < rthc_table[i].end; + ++rthc) { + if (rthc->mr_pid == self_pid) { + rthc->mr_pid = 0; + mdbx_trace("== cleanup %p", __Wpedantic_format_voidptr(rthc)); + } + } + if (--rthc_count > 0) + rthc_table[i] = rthc_table[rthc_count]; + else if (rthc_table != rthc_table_static) { + mdbx_free(rthc_table); + rthc_table = rthc_table_static; + rthc_limit = RTHC_INITIAL_LIMIT; + } + break; + } + } + + mdbx_trace("<< key %zu, rthc_count %u, rthc_limit %u", (size_t)key, + rthc_count, rthc_limit); + rthc_unlock(); +} + +//------------------------------------------------------------------------------ + +#define RTHC_ENVLIST_END ((MDBX_env *)((uintptr_t)50459)) +static MDBX_env *inprocess_lcklist_head = RTHC_ENVLIST_END; + +static __inline void lcklist_lock(void) { +#if defined(_WIN32) || defined(_WIN64) + EnterCriticalSection(&lcklist_critical_section); +#else + mdbx_ensure(nullptr, pthread_mutex_lock(&lcklist_mutex) == 0); +#endif +} + +static __inline void lcklist_unlock(void) { +#if defined(_WIN32) || defined(_WIN64) + LeaveCriticalSection(&lcklist_critical_section); +#else + mdbx_ensure(nullptr, pthread_mutex_unlock(&lcklist_mutex) == 0); +#endif +} + +static uint64_t rrxmrrxmsx_0(uint64_t v) { + /* Pelle Evensen's mixer, https://bit.ly/2HOfynt */ + v ^= (v << 39 | v >> 25) ^ (v << 14 | v >> 50); + v *= UINT64_C(0xA24BAED4963EE407); + v ^= (v << 40 | v >> 24) ^ (v << 15 | v >> 49); + v *= UINT64_C(0x9FB21C651E98DF25); + return v ^ v >> 28; +} + +static int uniq_peek(const mdbx_mmap_t *pending, mdbx_mmap_t *scan) { + int rc; + uint64_t bait; + if (pending->address) { + bait = pending->lck->mti_bait_uniqueness; + rc = MDBX_SUCCESS; + } else { + bait = 0 /* hush MSVC warning */; + rc = mdbx_msync(scan, 0, sizeof(MDBX_lockinfo), true); + if (rc == MDBX_SUCCESS) + rc = + mdbx_pread(pending->fd, &bait, sizeof(scan->lck->mti_bait_uniqueness), + offsetof(MDBX_lockinfo, mti_bait_uniqueness)); + } + if (likely(rc == MDBX_SUCCESS) && bait == scan->lck->mti_bait_uniqueness) + rc = MDBX_RESULT_TRUE; + + mdbx_trace("uniq-peek: %s, bait 0x%016" PRIx64 ",%s rc %d", + pending->lck ? "mem" : "file", bait, + (rc == MDBX_RESULT_TRUE) ? " found," : (rc ? " FAILED," : ""), rc); + return rc; +} + +static int uniq_poke(const mdbx_mmap_t *pending, mdbx_mmap_t *scan, + uint64_t *abra) { + if (*abra == 0) { + const uintptr_t tid = mdbx_thread_self(); + uintptr_t uit = 0; + memcpy(&uit, &tid, (sizeof(tid) < sizeof(uit)) ? sizeof(tid) : sizeof(uit)); + *abra = + rrxmrrxmsx_0(mdbx_osal_monotime() + UINT64_C(5873865991930747) * uit); + } + const uint64_t cadabra = + rrxmrrxmsx_0(*abra + UINT64_C(7680760450171793) * (unsigned)mdbx_getpid()) + << 24 | + *abra >> 40; + scan->lck->mti_bait_uniqueness = cadabra; + mdbx_flush_incoherent_cpu_writeback(); + *abra = *abra * UINT64_C(6364136223846793005) + 1; + return uniq_peek(pending, scan); +} + +__cold static int uniq_check(const mdbx_mmap_t *pending, MDBX_env **found) { + *found = nullptr; + uint64_t salt = 0; + for (MDBX_env *scan = inprocess_lcklist_head; scan != RTHC_ENVLIST_END; + scan = scan->me_lcklist_next) { + int err = scan->me_lck_mmap.lck->mti_bait_uniqueness + ? uniq_peek(pending, &scan->me_lck_mmap) + : uniq_poke(pending, &scan->me_lck_mmap, &salt); + if (err == MDBX_ENODATA) { + uint64_t length; + if (likely(mdbx_filesize(pending->fd, &length) == MDBX_SUCCESS && + length == 0)) { + /* LY: skip checking since LCK-file is empty, i.e. just created. */ + mdbx_debug("uniq-probe: %s", "unique (new/empty lck)"); + return MDBX_RESULT_TRUE; + } + } + if (err == MDBX_RESULT_TRUE) + err = uniq_poke(pending, &scan->me_lck_mmap, &salt); + if (err == MDBX_RESULT_TRUE) { + (void)mdbx_msync(&scan->me_lck_mmap, 0, sizeof(MDBX_lockinfo), false); + err = uniq_poke(pending, &scan->me_lck_mmap, &salt); + } + if (err == MDBX_RESULT_TRUE) { + err = uniq_poke(pending, &scan->me_lck_mmap, &salt); + *found = scan; + mdbx_debug("uniq-probe: found %p", __Wpedantic_format_voidptr(*found)); + return MDBX_RESULT_FALSE; + } + if (unlikely(err != MDBX_SUCCESS)) { + mdbx_debug("uniq-probe: failed rc %d", err); + return err; + } + } + + mdbx_debug("uniq-probe: %s", "unique"); + return MDBX_RESULT_TRUE; +} + +static int lcklist_detach_locked(MDBX_env *env) { + MDBX_env *inprocess_neighbor = nullptr; + int rc = MDBX_SUCCESS; + if (env->me_lcklist_next != nullptr) { + mdbx_ensure(env, env->me_lcklist_next != nullptr); + mdbx_ensure(env, inprocess_lcklist_head != RTHC_ENVLIST_END); + for (MDBX_env **ptr = &inprocess_lcklist_head; *ptr != RTHC_ENVLIST_END; + ptr = &(*ptr)->me_lcklist_next) { + if (*ptr == env) { + *ptr = env->me_lcklist_next; + env->me_lcklist_next = nullptr; + break; + } + } + mdbx_ensure(env, env->me_lcklist_next == nullptr); + } + + rc = likely(mdbx_getpid() == env->me_pid) + ? uniq_check(&env->me_lck_mmap, &inprocess_neighbor) + : MDBX_PANIC; + if (!inprocess_neighbor && env->me_live_reader) + (void)mdbx_rpid_clear(env); + if (!MDBX_IS_ERROR(rc)) + rc = mdbx_lck_destroy(env, inprocess_neighbor); + return rc; +} + +/*------------------------------------------------------------------------------ + * LY: State of the art quicksort-based sorting, with internal stack + * and network-sort for small chunks. + * Thanks to John M. Gamble for the http://pages.ripco.net/~jgamble/nw.html */ + +#define SORT_CMP_SWAP(TYPE, CMP, a, b) \ + do { \ + const TYPE swap_tmp = (a); \ + const bool swap_cmp = CMP(swap_tmp, b); \ + (a) = swap_cmp ? swap_tmp : b; \ + (b) = swap_cmp ? b : swap_tmp; \ + } while (0) + +// 3 comparators, 3 parallel operations +// o-----^--^--o +// | | +// o--^--|--v--o +// | | +// o--v--v-----o +// +// [[1,2]] +// [[0,2]] +// [[0,1]] +#define SORT_NETWORK_3(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + } while (0) + +// 5 comparators, 3 parallel operations +// o--^--^--------o +// | | +// o--v--|--^--^--o +// | | | +// o--^--v--|--v--o +// | | +// o--v-----v-----o +// +// [[0,1],[2,3]] +// [[0,2],[1,3]] +// [[1,2]] +#define SORT_NETWORK_4(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + } while (0) + +// 9 comparators, 5 parallel operations +// o--^--^-----^-----------o +// | | | +// o--|--|--^--v-----^--^--o +// | | | | | +// o--|--v--|--^--^--|--v--o +// | | | | | +// o--|-----v--|--v--|--^--o +// | | | | +// o--v--------v-----v--v--o +// +// [[0,4],[1,3]] +// [[0,2]] +// [[2,4],[0,1]] +// [[2,3],[1,4]] +// [[1,2],[3,4]] +#define SORT_NETWORK_5(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + } while (0) + +// 12 comparators, 6 parallel operations +// o-----^--^--^-----------------o +// | | | +// o--^--|--v--|--^--------^-----o +// | | | | | +// o--v--v-----|--|--^--^--|--^--o +// | | | | | | +// o-----^--^--v--|--|--|--v--v--o +// | | | | | +// o--^--|--v-----v--|--v--------o +// | | | +// o--v--v-----------v-----------o +// +// [[1,2],[4,5]] +// [[0,2],[3,5]] +// [[0,1],[3,4],[2,5]] +// [[0,3],[1,4]] +// [[2,4],[1,3]] +// [[2,3]] +#define SORT_NETWORK_6(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + } while (0) + +// 16 comparators, 6 parallel operations +// o--^--------^-----^-----------------o +// | | | +// o--|--^-----|--^--v--------^--^-----o +// | | | | | | +// o--|--|--^--v--|--^-----^--|--v-----o +// | | | | | | | +// o--|--|--|-----v--|--^--v--|--^--^--o +// | | | | | | | | +// o--v--|--|--^-----v--|--^--v--|--v--o +// | | | | | | +// o-----v--|--|--------v--v-----|--^--o +// | | | | +// o--------v--v-----------------v--v--o +// +// [[0,4],[1,5],[2,6]] +// [[0,2],[1,3],[4,6]] +// [[2,4],[3,5],[0,1]] +// [[2,3],[4,5]] +// [[1,4],[3,6]] +// [[1,2],[3,4],[5,6]] +#define SORT_NETWORK_7(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + } while (0) + +// 19 comparators, 6 parallel operations +// o--^--------^-----^-----------------o +// | | | +// o--|--^-----|--^--v--------^--^-----o +// | | | | | | +// o--|--|--^--v--|--^-----^--|--v-----o +// | | | | | | | +// o--|--|--|--^--v--|--^--v--|--^--^--o +// | | | | | | | | | +// o--v--|--|--|--^--v--|--^--v--|--v--o +// | | | | | | | +// o-----v--|--|--|--^--v--v-----|--^--o +// | | | | | | +// o--------v--|--v--|--^--------v--v--o +// | | | +// o-----------v-----v--v--------------o +// +// [[0,4],[1,5],[2,6],[3,7]] +// [[0,2],[1,3],[4,6],[5,7]] +// [[2,4],[3,5],[0,1],[6,7]] +// [[2,3],[4,5]] +// [[1,4],[3,6]] +// [[1,2],[3,4],[5,6]] +#define SORT_NETWORK_8(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + } while (0) + +// 25 comparators, 9 parallel operations +// o--^-----^--^-----^-----------------------------------o +// | | | | +// o--v--^--v--|-----|--^-----^-----------^--------------o +// | | | | | | +// o-----v-----|-----|--|-----|--^-----^--|--^-----^--^--o +// | | | | | | | | | | +// o--^-----^--v--^--v--|-----|--|-----|--v--|-----|--v--o +// | | | | | | | | | +// o--v--^--v-----|-----v--^--v--|-----|-----|--^--v-----o +// | | | | | | | +// o-----v--------|--------|-----v--^--v--^--|--|--^-----o +// | | | | | | | +// o--^-----^-----v--------|--------|-----|--v--v--v-----o +// | | | | | +// o--v--^--v--------------v--------|-----v--------------o +// | | +// o-----v--------------------------v--------------------o +// +// [[0,1],[3,4],[6,7]] +// [[1,2],[4,5],[7,8]] +// [[0,1],[3,4],[6,7],[2,5]] +// [[0,3],[1,4],[5,8]] +// [[3,6],[4,7],[2,5]] +// [[0,3],[1,4],[5,7],[2,6]] +// [[1,3],[4,6]] +// [[2,4],[5,6]] +// [[2,3]] +#define SORT_NETWORK_9(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + } while (0) + +// 29 comparators, 9 parallel operations +// o--------------^-----^--^--^-----------------------o +// | | | | +// o-----------^--|--^--|--|--v--^--------^-----------o +// | | | | | | | +// o--------^--|--|--|--|--v--^--v-----^--|--^--------o +// | | | | | | | | | +// o-----^--|--|--|--|--v--^--|-----^--|--v--v--^-----o +// | | | | | | | | | | +// o--^--|--|--|--|--v-----|--v--^--|--|--^-----v--^--o +// | | | | | | | | | | | +// o--|--|--|--|--v--^-----|--^--|--v--v--|-----^--v--o +// | | | | | | | | | | +// o--|--|--|--v--^--|-----v--|--v--^-----|--^--v-----o +// | | | | | | | | | +// o--|--|--v-----|--|--^-----v--^--|-----v--v--------o +// | | | | | | | +// o--|--v--------|--v--|--^-----v--v-----------------o +// | | | | +// o--v-----------v-----v--v--------------------------o +// +// [[4,9],[3,8],[2,7],[1,6],[0,5]] +// [[1,4],[6,9],[0,3],[5,8]] +// [[0,2],[3,6],[7,9]] +// [[0,1],[2,4],[5,7],[8,9]] +// [[1,2],[4,6],[7,8],[3,5]] +// [[2,5],[6,8],[1,3],[4,7]] +// [[2,3],[6,7]] +// [[3,4],[5,6]] +// [[4,5]] +#define SORT_NETWORK_10(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + } while (0) + +// 35 comparators, 9 parallel operations +// o--^-----^-----------------^--------^--------------------o +// | | | | +// o--v--^--|--^--^--------^--|--------|--^-----------------o +// | | | | | | | | +// o--^--|--v--v--|-----^--|--|--------|--|-----^--^--------o +// | | | | | | | | | | +// o--v--v--------|-----|--|--|--^-----|--|--^--v--|--^--^--o +// | | | | | | | | | | | +// o--^-----^-----|-----|--|--v--|--^--v--v--|-----v--|--v--o +// | | | | | | | | | +// o--v--^--|--^--v--^--|--v-----|--|--------|--------v--^--o +// | | | | | | | | | +// o--^--|--v--v--^--|--v--^-----|--|--------|--------^--v--o +// | | | | | | | | | +// o--v--v--------|--|-----|-----v--|--^-----|-----^--|--^--o +// | | | | | | | | | +// o--^--^--------|--|-----|--------v--|-----v--^--|--v--v--o +// | | | | | | | | +// o--v--|--^-----|--v-----|-----------|--------v--v--------o +// | | | | | +// o-----v--v-----v--------v-----------v--------------------o +// +// [[0,1],[2,3],[4,5],[6,7],[8,9]] +// [[1,3],[5,7],[0,2],[4,6],[8,10]] +// [[1,2],[5,6],[9,10],[0,4],[3,7]] +// [[1,5],[6,10],[4,8]] +// [[5,9],[2,6],[0,4],[3,8]] +// [[1,5],[6,10],[2,3],[8,9]] +// [[1,4],[7,10],[3,5],[6,8]] +// [[2,4],[7,9],[5,6]] +// [[3,4],[7,8]] +#define SORT_NETWORK_11(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + } while (0) + +// 39 comparators, parallel operations +// o--^-----^-----------------^--------^--------------------o +// | | | | +// o--v--^--|--^--^--------^--|--------|--^-----------------o +// | | | | | | | | +// o--^--|--v--v--|-----^--|--|--------|--|-----^--^--------o +// | | | | | | | | | | +// o--v--v--------|-----|--|--|--^-----|--|--^--v--|--^--^--o +// | | | | | | | | | | | +// o--^-----^-----|-----|--|--v--|--^--v--v--|-----v--|--v--o +// | | | | | | | | | +// o--v--^--|--^--v--^--|--v-----|--|--------|--------v--^--o +// | | | | | | | | | +// o--^--|--v--v--^--|--v--^-----|--|--------|--------^--v--o +// | | | | | | | | | +// o--v--v--------|--|-----|--^--v--|--^--^--|-----^--|--^--o +// | | | | | | | | | | | +// o--^-----^-----|--|-----|--|-----v--|--|--v--^--|--v--v--o +// | | | | | | | | | | +// o--v--^--|--^--|--v-----|--|--------|--|-----v--v--------o +// | | | | | | | | +// o--^--|--v--v--v--------v--|--------|--v-----------------o +// | | | | +// o--v--v--------------------v--------v--------------------o +// +// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11]] +// [[1,3],[5,7],[9,11],[0,2],[4,6],[8,10]] +// [[1,2],[5,6],[9,10],[0,4],[7,11]] +// [[1,5],[6,10],[3,7],[4,8]] +// [[5,9],[2,6],[0,4],[7,11],[3,8]] +// [[1,5],[6,10],[2,3],[8,9]] +// [[1,4],[7,10],[3,5],[6,8]] +// [[2,4],[7,9],[5,6]] +// [[3,4],[7,8]] +#define SORT_NETWORK_12(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + } while (0) + +// 45 comparators, 10 parallel operations +// o--------^--^-----^-----------------------------^-----------------o +// | | | | +// o--^-----|--v-----|-----^--------------^-----^--|-----^-----------o +// | | | | | | | | +// o--|-----|--^--^--v-----|--------------|--^--|--|--^--v--^--------o +// | | | | | | | | | | | +// o--|--^--|--|--v-----^--|--------^-----|--|--v--|--|--^--v-----^--o +// | | | | | | | | | | | | | +// o--|--v--|--|--^-----|--v-----^--v-----|--|--^--|--|--|--^--^--v--o +// | | | | | | | | | | | | | | +// o--|--^--|--|--|--^--|--------|-----^--|--|--|--v--v--v--|--v--^--o +// | | | | | | | | | | | | | | +// o--|--|--|--v--v--|--|--^-----|--^--v--|--v--|--^--------v--^--v--o +// | | | | | | | | | | | | +// o--v--|--|-----^--|--v--|--^--|--|-----v-----v--|--^--------v-----o +// | | | | | | | | | | +// o-----v--|--^--|--|-----|--v--|--|--^-----^-----v--v--^-----------o +// | | | | | | | | | | +// o--^-----|--|--|--v-----|-----v--|--v--^--|--^--------v-----------o +// | | | | | | | | | +// o--|-----|--|--|--^-----|--------v--^--|--v--v--------------------o +// | | | | | | | | +// o--v-----|--v--|--v-----|--^--------v--v--------------------------o +// | | | | +// o--------v-----v--------v--v--------------------------------------o +// +// [[1,7],[9,11],[3,4],[5,8],[0,12],[2,6]] +// [[0,1],[2,3],[4,6],[8,11],[7,12],[5,9]] +// [[0,2],[3,7],[10,11],[1,4],[6,12]] +// [[7,8],[11,12],[4,9],[6,10]] +// [[3,4],[5,6],[8,9],[10,11],[1,7]] +// [[2,6],[9,11],[1,3],[4,7],[8,10],[0,5]] +// [[2,5],[6,8],[9,10]] +// [[1,2],[3,5],[7,8],[4,6]] +// [[2,3],[4,5],[6,7],[8,9]] +// [[3,4],[5,6]] +#define SORT_NETWORK_13(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + } while (0) + +/* *INDENT-OFF* */ +/* clang-format off */ + +// 51 comparators, 10 parallel operations +// o--^--^-----^-----------^-----------------------------------------------------------o +// | | | | +// o--v--|--^--|--^--------|--^-----^-----------------------^--------------------------o +// | | | | | | | | +// o--^--v--|--|--|--^-----|--|--^--v-----------------------|--^--^--------------------o +// | | | | | | | | | | | +// o--v-----v--|--|--|--^--|--|--|--^--------------^--------|--|--|--^--^--^-----------o +// | | | | | | | | | | | | | | | +// o--^--^-----v--|--|--|--|--|--|--|--^-----------|-----^--v--|--v--|--|--v-----------o +// | | | | | | | | | | | | | | | +// o--v--|--^-----v--|--|--|--|--|--|--|--^--^-----|-----|-----|--^--|--v-----^--------o +// | | | | | | | | | | | | | | | | | +// o--^--v--|--------v--|--|--|--|--|--|--|--|--^--|-----|-----|--v--|-----^--v-----^--o +// | | | | | | | | | | | | | | | | | +// o--v-----v-----------v--|--|--|--|--|--|--|--|--|--^--|--^--|-----|--^--|--^--^--v--o +// | | | | | | | | | | | | | | | | | | +// o--^--^-----^-----------v--|--|--|--|--|--|--|--|--|--v--|--v-----v--|--v--|--v--^--o +// | | | | | | | | | | | | | | | | +// o--v--|--^--|--^-----------v--|--|--|--|--|--v--|--|-----|--^--------|-----v--^--v--o +// | | | | | | | | | | | | | | | +// o--^--v--|--|--|--------------v--|--|--|--v-----|--|-----|--v--------|--^-----v-----o +// | | | | | | | | | | | | +// o--v-----v--|--|-----------------v--|--|--------|--v-----|--^--------|--|--^--------o +// | | | | | | | | | | +// o--^--------v--|--------------------v--|--------v--------|--|--------v--v--v--------o +// | | | | | +// o--v-----------v-----------------------v-----------------v--v-----------------------o +// +// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11],[12,13]] +// [[0,2],[4,6],[8,10],[1,3],[5,7],[9,11]] +// [[0,4],[8,12],[1,5],[9,13],[2,6],[3,7]] +// [[0,8],[1,9],[2,10],[3,11],[4,12],[5,13]] +// [[5,10],[6,9],[3,12],[7,11],[1,2],[4,8]] +// [[1,4],[7,13],[2,8],[5,6],[9,10]] +// [[2,4],[11,13],[3,8],[7,12]] +// [[6,8],[10,12],[3,5],[7,9]] +// [[3,4],[5,6],[7,8],[9,10],[11,12]] +// [[6,7],[8,9]] + +/* *INDENT-ON* */ +/* clang-format on */ + +#define SORT_NETWORK_14(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + } while (0) + +/* *INDENT-OFF* */ +/* clang-format off */ + +// 56 comparators, 10 parallel operations +// o--^--^-----^-----------^--------------------------------------------------------------o +// | | | | +// o--v--|--^--|--^--------|--^-----^--------------------------^--------------------------o +// | | | | | | | | +// o--^--v--|--|--|--^-----|--|--^--v--------------------------|--^--^--------------------o +// | | | | | | | | | | | +// o--v-----v--|--|--|--^--|--|--|--^-----------------^--------|--|--|--^--^--^-----------o +// | | | | | | | | | | | | | | | +// o--^--^-----v--|--|--|--|--|--|--|--^--------------|-----^--v--|--v--|--|--v-----------o +// | | | | | | | | | | | | | | | +// o--v--|--^-----v--|--|--|--|--|--|--|--^-----^-----|-----|-----|--^--|--v-----^--------o +// | | | | | | | | | | | | | | | | | +// o--^--v--|--------v--|--|--|--|--|--|--|--^--|--^--|-----|-----|--v--|-----^--v-----^--o +// | | | | | | | | | | | | | | | | | | +// o--v-----v-----------v--|--|--|--|--|--|--|--|--|--|--^--|--^--|-----|--^--|--^--^--v--o +// | | | | | | | | | | | | | | | | | | | +// o--^--^-----^-----------v--|--|--|--|--|--|--|--|--|--|--v--|--v-----v--|--v--|--v--^--o +// | | | | | | | | | | | | | | | | | +// o--v--|--^--|--^-----------v--|--|--|--|--|--|--v--|--|-----|--^--------|-----v--^--v--o +// | | | | | | | | | | | | | | | | +// o--^--v--|--|--|--^-----------v--|--|--|--|--v-----|--|-----|--v--------|--^-----v-----o +// | | | | | | | | | | | | | | +// o--v-----v--|--|--|--------------v--|--|--|--------|--v-----|--^--^-----|--|--^--------o +// | | | | | | | | | | | | | +// o--^--^-----v--|--|-----------------v--|--|--------v--------|--|--|-----v--v--v--------o +// | | | | | | | | | +// o--v--|--------v--|--------------------v--|--^--------------v--|--v--------------------o +// | | | | | +// o-----v-----------v-----------------------v--v-----------------v-----------------------o +// +// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11],[12,13]] +// [[0,2],[4,6],[8,10],[12,14],[1,3],[5,7],[9,11]] +// [[0,4],[8,12],[1,5],[9,13],[2,6],[10,14],[3,7]] +// [[0,8],[1,9],[2,10],[3,11],[4,12],[5,13],[6,14]] +// [[5,10],[6,9],[3,12],[13,14],[7,11],[1,2],[4,8]] +// [[1,4],[7,13],[2,8],[11,14],[5,6],[9,10]] +// [[2,4],[11,13],[3,8],[7,12]] +// [[6,8],[10,12],[3,5],[7,9]] +// [[3,4],[5,6],[7,8],[9,10],[11,12]] +// [[6,7],[8,9]] + +/* *INDENT-ON* */ +/* clang-format on */ + +#define SORT_NETWORK_15(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[13], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + } while (0) + +/* *INDENT-OFF* */ +/* clang-format off */ + +// 60 comparators, 10 parallel operations +// o--^--^-----^-----------^-----------------------------------------------------------------o +// | | | | +// o--v--|--^--|--^--------|--^-----^-----------------------------^--------------------------o +// | | | | | | | | +// o--^--v--|--|--|--^-----|--|--^--v-----------------------------|--^--^--------------------o +// | | | | | | | | | | | +// o--v-----v--|--|--|--^--|--|--|--^--------------------^--------|--|--|--^--^--^-----------o +// | | | | | | | | | | | | | | | +// o--^--^-----v--|--|--|--|--|--|--|--^-----------------|-----^--v--|--v--|--|--v-----------o +// | | | | | | | | | | | | | | | +// o--v--|--^-----v--|--|--|--|--|--|--|--^--------^-----|-----|-----|--^--|--v-----^--------o +// | | | | | | | | | | | | | | | | | +// o--^--v--|--------v--|--|--|--|--|--|--|--^-----|--^--|-----|-----|--v--|-----^--v-----^--o +// | | | | | | | | | | | | | | | | | | +// o--v-----v-----------v--|--|--|--|--|--|--|--^--|--|--|--^--|--^--|-----|--^--|--^--^--v--o +// | | | | | | | | | | | | | | | | | | | | +// o--^--^-----^-----------v--|--|--|--|--|--|--|--|--|--|--|--v--|--v-----v--|--v--|--v--^--o +// | | | | | | | | | | | | | | | | | | +// o--v--|--^--|--^-----------v--|--|--|--|--|--|--|--v--|--|-----|--^--------|-----v--^--v--o +// | | | | | | | | | | | | | | | | | +// o--^--v--|--|--|--^-----------v--|--|--|--|--|--v-----|--|-----|--v--------|--^-----v-----o +// | | | | | | | | | | | | | | | +// o--v-----v--|--|--|--^-----------v--|--|--|--|--------|--v-----|--^--^-----|--|--^--------o +// | | | | | | | | | | | | | | | +// o--^--^-----v--|--|--|--------------v--|--|--|--------v--------|--|--|-----v--v--v--------o +// | | | | | | | | | | | +// o--v--|--^-----v--|--|-----------------v--|--|--^--------------v--|--v--------------------o +// | | | | | | | | +// o--^--v--|--------v--|--------------------v--|--v-----------------v-----------------------o +// | | | | +// o--v-----v-----------v-----------------------v--------------------------------------------o +// +// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11],[12,13],[14,15]] +// [[0,2],[4,6],[8,10],[12,14],[1,3],[5,7],[9,11],[13,15]] +// [[0,4],[8,12],[1,5],[9,13],[2,6],[10,14],[3,7],[11,15]] +// [[0,8],[1,9],[2,10],[3,11],[4,12],[5,13],[6,14],[7,15]] +// [[5,10],[6,9],[3,12],[13,14],[7,11],[1,2],[4,8]] +// [[1,4],[7,13],[2,8],[11,14],[5,6],[9,10]] +// [[2,4],[11,13],[3,8],[7,12]] +// [[6,8],[10,12],[3,5],[7,9]] +// [[3,4],[5,6],[7,8],[9,10],[11,12]] +// [[6,7],[8,9]] + +/* *INDENT-ON* */ +/* clang-format on */ + +#define SORT_NETWORK_16(TYPE, CMP, begin) \ + do { \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[14], begin[15]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[13], begin[15]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[15]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[15]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[13], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[14]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[13]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ + SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ + } while (0) + +#define SORT_INNER(TYPE, CMP, begin, end, len) \ + switch (len) { \ + default: \ + __unreachable(); \ + case 0: \ + case 1: \ + break; \ + case 2: \ + SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ + break; \ + case 3: \ + SORT_NETWORK_3(TYPE, CMP, begin); \ + break; \ + case 4: \ + SORT_NETWORK_4(TYPE, CMP, begin); \ + break; \ + case 5: \ + SORT_NETWORK_5(TYPE, CMP, begin); \ + break; \ + case 6: \ + SORT_NETWORK_6(TYPE, CMP, begin); \ + break; \ + case 7: \ + SORT_NETWORK_7(TYPE, CMP, begin); \ + break; \ + case 8: \ + SORT_NETWORK_8(TYPE, CMP, begin); \ + break; \ + case 9: \ + SORT_NETWORK_9(TYPE, CMP, begin); \ + break; \ + case 10: \ + SORT_NETWORK_10(TYPE, CMP, begin); \ + break; \ + case 11: \ + SORT_NETWORK_11(TYPE, CMP, begin); \ + break; \ + case 12: \ + SORT_NETWORK_12(TYPE, CMP, begin); \ + break; \ + case 13: \ + SORT_NETWORK_13(TYPE, CMP, begin); \ + break; \ + case 14: \ + SORT_NETWORK_14(TYPE, CMP, begin); \ + break; \ + case 15: \ + SORT_NETWORK_15(TYPE, CMP, begin); \ + break; \ + case 16: \ + SORT_NETWORK_16(TYPE, CMP, begin); \ + break; \ + } + +#define SORT_SWAP(TYPE, a, b) \ + do { \ + const TYPE swap_tmp = (a); \ + (a) = (b); \ + (b) = swap_tmp; \ + } while (0) + +#define SORT_PUSH(low, high) \ + do { \ + top->lo = (low); \ + top->hi = (high); \ + ++top; \ + } while (0) + +#define SORT_POP(low, high) \ + do { \ + --top; \ + low = top->lo; \ + high = top->hi; \ + } while (0) + +#define SORT_IMPL(NAME, EXPECT_LOW_CARDINALITY_OR_PRESORTED, TYPE, CMP) \ + \ + static __inline bool NAME##_is_sorted(const TYPE *first, const TYPE *last) { \ + while (++first <= last) \ + if (CMP(first[0], first[-1])) \ + return false; \ + return true; \ + } \ + \ + typedef struct { \ + TYPE *lo, *hi; \ + } NAME##_stack; \ + \ + static __hot void NAME(TYPE *const begin, TYPE *const end) { \ + NAME##_stack stack[sizeof(unsigned) * CHAR_BIT], *top = stack; \ + \ + TYPE *hi = end - 1; \ + TYPE *lo = begin; \ + while (true) { \ + const ptrdiff_t len = hi - lo; \ + if (len < 16) { \ + SORT_INNER(TYPE, CMP, lo, hi + 1, len + 1); \ + if (unlikely(top == stack)) \ + break; \ + SORT_POP(lo, hi); \ + continue; \ + } \ + \ + TYPE *mid = lo + (len >> 1); \ + SORT_CMP_SWAP(TYPE, CMP, *lo, *mid); \ + SORT_CMP_SWAP(TYPE, CMP, *mid, *hi); \ + SORT_CMP_SWAP(TYPE, CMP, *lo, *mid); \ + \ + TYPE *right = hi - 1; \ + TYPE *left = lo + 1; \ + while (1) { \ + while (CMP(*left, *mid)) \ + ++left; \ + while (CMP(*mid, *right)) \ + --right; \ + if (unlikely(left > right)) { \ + if (EXPECT_LOW_CARDINALITY_OR_PRESORTED) { \ + if (NAME##_is_sorted(lo, right)) \ + lo = right + 1; \ + if (NAME##_is_sorted(left, hi)) \ + hi = left; \ + } \ + break; \ + } \ + SORT_SWAP(TYPE, *left, *right); \ + mid = (mid == left) ? right : (mid == right) ? left : mid; \ + ++left; \ + --right; \ + } \ + \ + if (right - lo > hi - left) { \ + SORT_PUSH(lo, right); \ + lo = left; \ + } else { \ + SORT_PUSH(left, hi); \ + hi = right; \ + } \ + } \ + \ + if (mdbx_audit_enabled()) { \ + for (TYPE *scan = begin + 1; scan < end; ++scan) \ + assert(CMP(scan[-1], scan[0])); \ + } \ + } + +/*------------------------------------------------------------------------------ + * LY: Binary search */ + +#define SEARCH_IMPL(NAME, TYPE_LIST, TYPE_ARG, CMP) \ + static __always_inline TYPE_LIST *NAME(TYPE_LIST *first, unsigned length, \ + const TYPE_ARG item) { \ + TYPE_LIST *const begin = first, *const end = begin + length; \ + \ + while (length > 3) { \ + const unsigned whole = length; \ + length >>= 1; \ + TYPE_LIST *const middle = first + length; \ + if (CMP(*middle, item)) { \ + first = middle + 1; \ + length = whole - length - 1; \ + } \ + } \ + \ + switch (length) { \ + case 3: \ + if (!CMP(*first, item)) \ + break; \ + ++first; \ + __fallthrough /* fall through */; \ + case 2: \ + if (!CMP(*first, item)) \ + break; \ + ++first; \ + __fallthrough /* fall through */; \ + case 1: \ + if (!CMP(*first, item)) \ + break; \ + ++first; \ + __fallthrough /* fall through */; \ + case 0: \ + break; \ + default: \ + __unreachable(); \ + } \ + \ + if (mdbx_audit_enabled()) { \ + for (TYPE_LIST *scan = begin; scan < first; ++scan) \ + assert(CMP(*scan, item)); \ + for (TYPE_LIST *scan = first; scan < end; ++scan) \ + assert(!CMP(*scan, item)); \ + (void)begin, (void)end; \ + } \ + \ + return first; \ + } + +/*----------------------------------------------------------------------------*/ + +static __always_inline size_t pnl2bytes(const size_t size) { + assert(size > 0 && size <= MDBX_PNL_MAX * 2); + size_t bytes = + ceil_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + sizeof(pgno_t) * (size + 2), + MDBX_PNL_GRANULATE * sizeof(pgno_t)) - + MDBX_ASSUME_MALLOC_OVERHEAD; + return bytes; +} + +static __always_inline pgno_t bytes2pnl(const size_t bytes) { + size_t size = bytes / sizeof(pgno_t); + assert(size > 2 && size <= MDBX_PNL_MAX * 2); + return (pgno_t)size - 2; +} + +static MDBX_PNL mdbx_pnl_alloc(size_t size) { + size_t bytes = pnl2bytes(size); + MDBX_PNL pl = mdbx_malloc(bytes); + if (likely(pl)) { +#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) + bytes = malloc_usable_size(pl); +#endif /* malloc_usable_size */ + pl[0] = bytes2pnl(bytes); + assert(pl[0] >= size); + pl[1] = 0; + pl += 1; + } + return pl; +} + +static void mdbx_pnl_free(MDBX_PNL pl) { + if (likely(pl)) + mdbx_free(pl - 1); +} + +/* Shrink the PNL to the default size if it has grown larger */ +static void mdbx_pnl_shrink(MDBX_PNL *ppl) { + assert(bytes2pnl(pnl2bytes(MDBX_PNL_INITIAL)) == MDBX_PNL_INITIAL); + assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PNL_MAX && + MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); + MDBX_PNL_SIZE(*ppl) = 0; + if (unlikely(MDBX_PNL_ALLOCLEN(*ppl) > + MDBX_PNL_INITIAL * 2 - MDBX_CACHELINE_SIZE / sizeof(pgno_t))) { + size_t bytes = pnl2bytes(MDBX_PNL_INITIAL); + MDBX_PNL pl = mdbx_realloc(*ppl - 1, bytes); + if (likely(pl)) { +#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) + bytes = malloc_usable_size(pl); +#endif /* malloc_usable_size */ + *pl = bytes2pnl(bytes); + *ppl = pl + 1; + } + } +} + +/* Grow the PNL to the size growed to at least given size */ +static int mdbx_pnl_reserve(MDBX_PNL *ppl, const size_t wanna) { + const size_t allocated = MDBX_PNL_ALLOCLEN(*ppl); + assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PNL_MAX && + MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); + if (likely(allocated >= wanna)) + return MDBX_SUCCESS; + + if (unlikely(wanna > /* paranoia */ MDBX_PNL_MAX)) + return MDBX_TXN_FULL; + + const size_t size = (wanna + wanna - allocated < MDBX_PNL_MAX) + ? wanna + wanna - allocated + : MDBX_PNL_MAX; + size_t bytes = pnl2bytes(size); + MDBX_PNL pl = mdbx_realloc(*ppl - 1, bytes); + if (likely(pl)) { +#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) + bytes = malloc_usable_size(pl); +#endif /* malloc_usable_size */ + *pl = bytes2pnl(bytes); + assert(*pl >= wanna); + *ppl = pl + 1; + return MDBX_SUCCESS; + } + return MDBX_ENOMEM; +} + +/* Make room for num additional elements in an PNL */ +static __always_inline int __must_check_result mdbx_pnl_need(MDBX_PNL *ppl, + size_t num) { + assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PNL_MAX && + MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); + assert(num <= MDBX_PNL_MAX); + const size_t wanna = MDBX_PNL_SIZE(*ppl) + num; + return likely(MDBX_PNL_ALLOCLEN(*ppl) >= wanna) + ? MDBX_SUCCESS + : mdbx_pnl_reserve(ppl, wanna); +} + +static __always_inline void mdbx_pnl_xappend(MDBX_PNL pl, pgno_t pgno) { + assert(MDBX_PNL_SIZE(pl) < MDBX_PNL_ALLOCLEN(pl)); + if (mdbx_audit_enabled()) { + for (unsigned i = MDBX_PNL_SIZE(pl); i > 0; --i) + assert(pgno != pl[i]); + } + MDBX_PNL_SIZE(pl) += 1; + MDBX_PNL_LAST(pl) = pgno; +} + +/* Append an pgno onto an unsorted PNL */ +static __hot int __must_check_result mdbx_pnl_append(MDBX_PNL *ppl, + pgno_t pgno) { + /* Too big? */ + if (unlikely(MDBX_PNL_SIZE(*ppl) == MDBX_PNL_ALLOCLEN(*ppl))) { + int rc = mdbx_pnl_need(ppl, MDBX_PNL_GRANULATE); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + mdbx_pnl_xappend(*ppl, pgno); + return MDBX_SUCCESS; +} + +/* Append an PNL onto an unsorted PNL */ +static int __must_check_result mdbx_pnl_append_list(MDBX_PNL *ppl, + MDBX_PNL append) { + const unsigned len = MDBX_PNL_SIZE(append); + if (likely(len)) { + int rc = mdbx_pnl_need(ppl, MDBX_PNL_SIZE(append)); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + const MDBX_PNL pnl = *ppl; + unsigned w = MDBX_PNL_SIZE(pnl), r = 1; + do + pnl[++w] = append[r]; + while (++r <= len); + MDBX_PNL_SIZE(pnl) = w; + } + return MDBX_SUCCESS; +} + +/* Append an pgno range onto an unsorted PNL */ +static __hot int __must_check_result mdbx_pnl_append_range(MDBX_PNL *ppl, + pgno_t pgno, + unsigned n) { + assert(n > 0); + int rc = mdbx_pnl_need(ppl, n); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + const MDBX_PNL pnl = *ppl; +#if MDBX_PNL_ASCENDING + unsigned w = MDBX_PNL_SIZE(pnl); + do + pnl[++w] = pgno++; + while (--n); + MDBX_PNL_SIZE(pnl) = w; +#else + unsigned w = MDBX_PNL_SIZE(pnl) + n; + MDBX_PNL_SIZE(pnl) = w; + do + pnl[w--] = --n + pgno; + while (n); +#endif + + return MDBX_SUCCESS; +} + +/* Append an pgno range into the sorted PNL */ +static __hot int __must_check_result mdbx_pnl_insert_range(MDBX_PNL *ppl, + pgno_t pgno, + unsigned n) { + assert(n > 0); + int rc = mdbx_pnl_need(ppl, n); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + const MDBX_PNL pnl = *ppl; + unsigned r = MDBX_PNL_SIZE(pnl), w = r + n; + MDBX_PNL_SIZE(pnl) = w; + while (r && MDBX_PNL_DISORDERED(pnl[r], pgno)) + pnl[w--] = pnl[r--]; + + for (pgno_t fill = MDBX_PNL_ASCENDING ? pgno + n : pgno; w > r; --w) + pnl[w] = MDBX_PNL_ASCENDING ? --fill : fill++; + + return MDBX_SUCCESS; +} + +static bool mdbx_pnl_check(const MDBX_PNL pl, const pgno_t limit) { + assert(limit >= MIN_PAGENO && limit <= MAX_PAGENO + 1); + if (likely(MDBX_PNL_SIZE(pl))) { + assert(MDBX_PNL_LEAST(pl) >= MIN_PAGENO); + assert(MDBX_PNL_MOST(pl) < limit); + assert(MDBX_PNL_SIZE(pl) <= MDBX_PNL_MAX); + if (unlikely(MDBX_PNL_SIZE(pl) > MDBX_PNL_MAX * 3 / 2)) + return false; + if (unlikely(MDBX_PNL_LEAST(pl) < MIN_PAGENO)) + return false; + if (unlikely(MDBX_PNL_MOST(pl) >= limit)) + return false; + if (mdbx_audit_enabled()) { + for (const pgno_t *scan = &MDBX_PNL_LAST(pl); --scan > pl;) { + assert(MDBX_PNL_ORDERED(scan[0], scan[1])); + if (unlikely(!MDBX_PNL_ORDERED(scan[0], scan[1]))) + return false; + } + } + } + return true; +} + +static __always_inline bool mdbx_pnl_check4assert(const MDBX_PNL pl, + const pgno_t limit) { + if (unlikely(pl == nullptr)) + return true; + assert(MDBX_PNL_ALLOCLEN(pl) >= MDBX_PNL_SIZE(pl)); + if (unlikely(MDBX_PNL_ALLOCLEN(pl) < MDBX_PNL_SIZE(pl))) + return false; + return mdbx_pnl_check(pl, limit); +} + +/* Merge an PNL onto an PNL. The destination PNL must be big enough */ +static void __hot mdbx_pnl_xmerge(MDBX_PNL dst, const MDBX_PNL src) { + assert(mdbx_pnl_check4assert(dst, MAX_PAGENO + 1)); + assert(mdbx_pnl_check(src, MAX_PAGENO + 1)); + const size_t total = MDBX_PNL_SIZE(dst) + MDBX_PNL_SIZE(src); + assert(MDBX_PNL_ALLOCLEN(dst) >= total); + pgno_t *w = dst + total; + pgno_t *d = dst + MDBX_PNL_SIZE(dst); + const pgno_t *s = src + MDBX_PNL_SIZE(src); + dst[0] = /* detent for scan below */ (MDBX_PNL_ASCENDING ? 0 : ~(pgno_t)0); + while (s > src) { + while (MDBX_PNL_ORDERED(*s, *d)) + *w-- = *d--; + *w-- = *s--; + } + MDBX_PNL_SIZE(dst) = (pgno_t)total; + assert(mdbx_pnl_check4assert(dst, MAX_PAGENO + 1)); +} + +SORT_IMPL(pgno_sort, false, pgno_t, MDBX_PNL_ORDERED) +static __hot void mdbx_pnl_sort(MDBX_PNL pnl) { + pgno_sort(MDBX_PNL_BEGIN(pnl), MDBX_PNL_END(pnl)); + assert(mdbx_pnl_check(pnl, MAX_PAGENO + 1)); +} + +/* Search for an pgno in an PNL. + * Returns The index of the first item greater than or equal to pgno. */ +SEARCH_IMPL(pgno_bsearch, pgno_t, pgno_t, MDBX_PNL_ORDERED) + +static __hot unsigned mdbx_pnl_search(MDBX_PNL pnl, pgno_t id) { + assert(mdbx_pnl_check4assert(pnl, MAX_PAGENO + 1)); + pgno_t *begin = MDBX_PNL_BEGIN(pnl); + pgno_t *it = pgno_bsearch(begin, MDBX_PNL_SIZE(pnl), id); + pgno_t *end = begin + MDBX_PNL_SIZE(pnl); + assert(it >= begin && it <= end); + if (it != begin) + assert(MDBX_PNL_ORDERED(it[-1], id)); + if (it != end) + assert(!MDBX_PNL_ORDERED(it[0], id)); + return (unsigned)(it - begin + 1); +} + +static __hot unsigned mdbx_pnl_exist(MDBX_PNL pnl, pgno_t id) { + unsigned n = mdbx_pnl_search(pnl, id); + return (n <= MDBX_PNL_SIZE(pnl) && pnl[n] == id) ? n : 0; +} + +/*----------------------------------------------------------------------------*/ + +static __always_inline size_t txl2bytes(const size_t size) { + assert(size > 0 && size <= MDBX_TXL_MAX * 2); + size_t bytes = + ceil_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + sizeof(txnid_t) * (size + 2), + MDBX_TXL_GRANULATE * sizeof(txnid_t)) - + MDBX_ASSUME_MALLOC_OVERHEAD; + return bytes; +} + +static __always_inline size_t bytes2txl(const size_t bytes) { + size_t size = bytes / sizeof(txnid_t); + assert(size > 2 && size <= MDBX_TXL_MAX * 2); + return size - 2; +} + +static MDBX_TXL mdbx_txl_alloc(void) { + size_t bytes = txl2bytes(MDBX_TXL_INITIAL); + MDBX_TXL tl = mdbx_malloc(bytes); + if (likely(tl)) { +#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) + bytes = malloc_usable_size(tl); +#endif /* malloc_usable_size */ + tl[0] = bytes2txl(bytes); + assert(tl[0] >= MDBX_TXL_INITIAL); + tl[1] = 0; + tl += 1; + } + return tl; +} + +static void mdbx_txl_free(MDBX_TXL tl) { + if (likely(tl)) + mdbx_free(tl - 1); +} + +static int mdbx_txl_reserve(MDBX_TXL *ptl, const size_t wanna) { + const size_t allocated = (size_t)MDBX_PNL_ALLOCLEN(*ptl); + assert(MDBX_PNL_SIZE(*ptl) <= MDBX_TXL_MAX && + MDBX_PNL_ALLOCLEN(*ptl) >= MDBX_PNL_SIZE(*ptl)); + if (likely(allocated >= wanna)) + return MDBX_SUCCESS; + + if (unlikely(wanna > /* paranoia */ MDBX_TXL_MAX)) + return MDBX_TXN_FULL; + + const size_t size = (wanna + wanna - allocated < MDBX_TXL_MAX) + ? wanna + wanna - allocated + : MDBX_TXL_MAX; + size_t bytes = txl2bytes(size); + MDBX_TXL tl = mdbx_realloc(*ptl - 1, bytes); + if (likely(tl)) { +#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) + bytes = malloc_usable_size(tl); +#endif /* malloc_usable_size */ + *tl = bytes2txl(bytes); + assert(*tl >= wanna); + *ptl = tl + 1; + return MDBX_SUCCESS; + } + return MDBX_ENOMEM; +} + +static __always_inline int __must_check_result mdbx_txl_need(MDBX_TXL *ptl, + size_t num) { + assert(MDBX_PNL_SIZE(*ptl) <= MDBX_TXL_MAX && + MDBX_PNL_ALLOCLEN(*ptl) >= MDBX_PNL_SIZE(*ptl)); + assert(num <= MDBX_PNL_MAX); + const size_t wanna = (size_t)MDBX_PNL_SIZE(*ptl) + num; + return likely(MDBX_PNL_ALLOCLEN(*ptl) >= wanna) + ? MDBX_SUCCESS + : mdbx_txl_reserve(ptl, wanna); +} + +static __always_inline void mdbx_txl_xappend(MDBX_TXL tl, txnid_t id) { + assert(MDBX_PNL_SIZE(tl) < MDBX_PNL_ALLOCLEN(tl)); + MDBX_PNL_SIZE(tl) += 1; + MDBX_PNL_LAST(tl) = id; +} + +#define TXNID_SORT_CMP(first, last) ((first) > (last)) +SORT_IMPL(txnid_sort, false, txnid_t, TXNID_SORT_CMP) +static void mdbx_txl_sort(MDBX_TXL tl) { + txnid_sort(MDBX_PNL_BEGIN(tl), MDBX_PNL_END(tl)); +} + +static int __must_check_result mdbx_txl_append(MDBX_TXL *ptl, txnid_t id) { + if (unlikely(MDBX_PNL_SIZE(*ptl) == MDBX_PNL_ALLOCLEN(*ptl))) { + int rc = mdbx_txl_need(ptl, MDBX_TXL_GRANULATE); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + mdbx_txl_xappend(*ptl, id); + return MDBX_SUCCESS; +} + +/*----------------------------------------------------------------------------*/ + +#define DP_SORT_CMP(first, last) ((first).pgno < (last).pgno) +SORT_IMPL(dp_sort, false, MDBX_DP, DP_SORT_CMP) +static __always_inline MDBX_DPL mdbx_dpl_sort(MDBX_DPL dl) { + assert(dl->length <= MDBX_DPL_TXNFULL); + assert(dl->sorted <= dl->length); + if (dl->sorted != dl->length) { + dl->sorted = dl->length; + dp_sort(dl + 1, dl + dl->length + 1); + } + return dl; +} + +/* Returns the index of the first dirty-page whose pgno + * member is greater than or equal to id. */ +#define DP_SEARCH_CMP(dp, id) ((dp).pgno < (id)) +SEARCH_IMPL(dp_bsearch, MDBX_DP, pgno_t, DP_SEARCH_CMP) + +static unsigned __hot mdbx_dpl_search(MDBX_DPL dl, pgno_t pgno) { + if (mdbx_audit_enabled()) { + for (const MDBX_DP *ptr = dl + dl->sorted; --ptr > dl;) { + assert(ptr[0].pgno < ptr[1].pgno); + assert(ptr[0].pgno >= NUM_METAS); + } + } + + switch (dl->length - dl->sorted) { + default: + /* sort a whole */ + dl->sorted = dl->length; + dp_sort(dl + 1, dl + dl->length + 1); + __fallthrough; /* fall through */ + case 0: + /* whole sorted cases */ + if (mdbx_audit_enabled()) { + for (const MDBX_DP *ptr = dl + dl->length; --ptr > dl;) { + assert(ptr[0].pgno < ptr[1].pgno); + assert(ptr[0].pgno >= NUM_METAS); + } + } + return (unsigned)(dp_bsearch(dl + 1, dl->length, pgno) - dl); + +#define LINEAR_SEARCH_CASE(N) \ + case N: \ + if (dl[dl->length - N + 1].pgno == pgno) \ + return dl->length - N + 1; \ + __fallthrough + + /* try linear search until the threshold */ + LINEAR_SEARCH_CASE(16); /* fall through */ + LINEAR_SEARCH_CASE(15); /* fall through */ + LINEAR_SEARCH_CASE(14); /* fall through */ + LINEAR_SEARCH_CASE(13); /* fall through */ + LINEAR_SEARCH_CASE(12); /* fall through */ + LINEAR_SEARCH_CASE(11); /* fall through */ + LINEAR_SEARCH_CASE(10); /* fall through */ + LINEAR_SEARCH_CASE(9); /* fall through */ + LINEAR_SEARCH_CASE(8); /* fall through */ + LINEAR_SEARCH_CASE(7); /* fall through */ + LINEAR_SEARCH_CASE(6); /* fall through */ + LINEAR_SEARCH_CASE(5); /* fall through */ + LINEAR_SEARCH_CASE(4); /* fall through */ + LINEAR_SEARCH_CASE(3); /* fall through */ + LINEAR_SEARCH_CASE(2); /* fall through */ + case 1: + if (dl[dl->length].pgno == pgno) + return dl->length; + /* continue bsearch on the sorted part */ + return (unsigned)(dp_bsearch(dl + 1, dl->sorted, pgno) - dl); + } +} + +static __always_inline MDBX_page *mdbx_dpl_find(MDBX_DPL dl, pgno_t pgno) { + const unsigned i = mdbx_dpl_search(dl, pgno); + assert((int)i > 0); + return (i <= dl->length && dl[i].pgno == pgno) ? dl[i].ptr : nullptr; +} + +static __hot MDBX_page *mdbx_dpl_remove(MDBX_DPL dl, pgno_t prno) { + unsigned i = mdbx_dpl_search(dl, prno); + assert((int)i > 0); + MDBX_page *mp = nullptr; + if (i <= dl->length && dl[i].pgno == prno) { + dl->sorted -= dl->sorted >= i; + mp = dl[i].ptr; + while (i < dl->length) { + dl[i] = dl[i + 1]; + ++i; + } + dl->length -= 1; + } + return mp; +} + +static __always_inline int __must_check_result +mdbx_dpl_append(MDBX_DPL dl, pgno_t pgno, MDBX_page *page) { + assert(dl->length <= MDBX_DPL_TXNFULL); + if (mdbx_audit_enabled()) { + for (unsigned i = dl->length; i > 0; --i) { + assert(dl[i].pgno != pgno); + if (unlikely(dl[i].pgno == pgno)) + return MDBX_PROBLEM; + } + } + + if (unlikely(dl->length == MDBX_DPL_TXNFULL)) + return MDBX_TXN_FULL; + + /* append page */ + const unsigned n = dl->length + 1; + if (n == 1 || (dl->sorted >= dl->length && dl[n - 1].pgno < pgno)) + dl->sorted = n; + dl->length = n; + dl[n].pgno = pgno; + dl[n].ptr = page; + return MDBX_SUCCESS; +} + +static __always_inline void mdbx_dpl_clear(MDBX_DPL dl) { + dl->sorted = dl->length = 0; +} + +/*----------------------------------------------------------------------------*/ + +#ifndef MDBX_ALLOY +uint8_t mdbx_runtime_flags = MDBX_RUNTIME_FLAGS_INIT; +uint8_t mdbx_loglevel = MDBX_DEBUG; +MDBX_debug_func *mdbx_debug_logger; +#endif /* MDBX_ALLOY */ + +static bool mdbx_refund(MDBX_txn *txn); +static __must_check_result int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp); +static __must_check_result int mdbx_page_loose(MDBX_txn *txn, MDBX_page *mp); +static int mdbx_page_alloc(MDBX_cursor *mc, const unsigned num, + MDBX_page **const mp, int flags); +static txnid_t mdbx_oomkick(MDBX_env *env, const txnid_t laggard); + +static int mdbx_page_new(MDBX_cursor *mc, uint32_t flags, unsigned num, + MDBX_page **mp); +static int mdbx_page_touch(MDBX_cursor *mc); +static int mdbx_cursor_touch(MDBX_cursor *mc); + +#define MDBX_END_NAMES \ + { \ + "committed", "empty-commit", "abort", "reset", "reset-tmp", "fail-begin", \ + "fail-beginchild" \ + } +enum { + /* mdbx_txn_end operation number, for logging */ + MDBX_END_COMMITTED, + MDBX_END_EMPTY_COMMIT, + MDBX_END_ABORT, + MDBX_END_RESET, + MDBX_END_RESET_TMP, + MDBX_END_FAIL_BEGIN, + MDBX_END_FAIL_BEGINCHILD +}; +#define MDBX_END_OPMASK 0x0F /* mask for mdbx_txn_end() operation number */ +#define MDBX_END_UPDATE 0x10 /* update env state (DBIs) */ +#define MDBX_END_FREE 0x20 /* free txn unless it is MDBX_env.me_txn0 */ +#define MDBX_END_EOTDONE 0x40 /* txn's cursors already closed */ +#define MDBX_END_SLOT 0x80 /* release any reader slot if MDBX_NOTLS */ +static int mdbx_txn_end(MDBX_txn *txn, unsigned mode); + +static int __must_check_result mdbx_page_get(MDBX_cursor *mc, pgno_t pgno, + MDBX_page **mp, int *lvl); +static int __must_check_result mdbx_page_search_root(MDBX_cursor *mc, + MDBX_val *key, int modify); + +#define MDBX_PS_MODIFY 1 +#define MDBX_PS_ROOTONLY 2 +#define MDBX_PS_FIRST 4 +#define MDBX_PS_LAST 8 +static int __must_check_result mdbx_page_search(MDBX_cursor *mc, MDBX_val *key, + int flags); +static int __must_check_result mdbx_page_merge(MDBX_cursor *csrc, + MDBX_cursor *cdst); +static int __must_check_result mdbx_page_flush(MDBX_txn *txn, + const unsigned keep); + +#define MDBX_SPLIT_REPLACE MDBX_APPENDDUP /* newkey is not new */ +static int __must_check_result mdbx_page_split(MDBX_cursor *mc, + const MDBX_val *newkey, + MDBX_val *newdata, + pgno_t newpgno, unsigned nflags); + +static int __must_check_result mdbx_read_header(MDBX_env *env, MDBX_meta *meta, + uint64_t *filesize, + const int lck_exclusive); +static int __must_check_result mdbx_sync_locked(MDBX_env *env, unsigned flags, + MDBX_meta *const pending); +static int mdbx_env_close0(MDBX_env *env); + +static MDBX_node *mdbx_node_search(MDBX_cursor *mc, MDBX_val *key, int *exactp); + +static int __must_check_result mdbx_node_add_branch(MDBX_cursor *mc, + unsigned indx, + const MDBX_val *key, + pgno_t pgno); +static int __must_check_result mdbx_node_add_leaf(MDBX_cursor *mc, + unsigned indx, + const MDBX_val *key, + MDBX_val *data, + unsigned flags); +static int __must_check_result mdbx_node_add_leaf2(MDBX_cursor *mc, + unsigned indx, + const MDBX_val *key); + +static void mdbx_node_del(MDBX_cursor *mc, size_t ksize); +static void mdbx_node_shrink(MDBX_page *mp, unsigned indx); +static int __must_check_result mdbx_node_move(MDBX_cursor *csrc, + MDBX_cursor *cdst, int fromleft); +static int __must_check_result mdbx_node_read(MDBX_cursor *mc, MDBX_node *leaf, + MDBX_val *data); +static int __must_check_result mdbx_rebalance(MDBX_cursor *mc); +static int __must_check_result mdbx_update_key(MDBX_cursor *mc, + const MDBX_val *key); + +static void mdbx_cursor_pop(MDBX_cursor *mc); +static int __must_check_result mdbx_cursor_push(MDBX_cursor *mc, MDBX_page *mp); + +static int __must_check_result mdbx_audit_ex(MDBX_txn *txn, + unsigned retired_stored, + bool dont_filter_gc); +static __maybe_unused __always_inline int __must_check_result +mdbx_audit(MDBX_txn *txn) { + return mdbx_audit_ex(txn, 0, (txn->mt_flags & MDBX_RDONLY) != 0); +} + +static int __must_check_result mdbx_page_check(MDBX_env *env, + const MDBX_page *const mp, + bool maybe_unfinished); +static int __must_check_result mdbx_cursor_check(MDBX_cursor *mc, bool pending); +static int __must_check_result mdbx_cursor_del0(MDBX_cursor *mc); +static int __must_check_result mdbx_del0(MDBX_txn *txn, MDBX_dbi dbi, + const MDBX_val *key, + const MDBX_val *data, unsigned flags); +static int __must_check_result mdbx_cursor_sibling(MDBX_cursor *mc, + int move_right); +static int __must_check_result mdbx_cursor_next(MDBX_cursor *mc, MDBX_val *key, + MDBX_val *data, + MDBX_cursor_op op); +static int __must_check_result mdbx_cursor_prev(MDBX_cursor *mc, MDBX_val *key, + MDBX_val *data, + MDBX_cursor_op op); +static int __must_check_result mdbx_cursor_set(MDBX_cursor *mc, MDBX_val *key, + MDBX_val *data, + MDBX_cursor_op op, int *exactp); +static int __must_check_result mdbx_cursor_first(MDBX_cursor *mc, MDBX_val *key, + MDBX_val *data); +static int __must_check_result mdbx_cursor_last(MDBX_cursor *mc, MDBX_val *key, + MDBX_val *data); + +static int __must_check_result mdbx_cursor_init(MDBX_cursor *mc, MDBX_txn *txn, + MDBX_dbi dbi); +static int __must_check_result mdbx_xcursor_init0(MDBX_cursor *mc); +static int __must_check_result mdbx_xcursor_init1(MDBX_cursor *mc, + MDBX_node *node); +static int __must_check_result mdbx_xcursor_init2(MDBX_cursor *mc, + MDBX_xcursor *src_mx, + int force); +static void mdbx_cursor_copy(const MDBX_cursor *csrc, MDBX_cursor *cdst); + +static int __must_check_result mdbx_drop0(MDBX_cursor *mc, int subs); +static int __must_check_result mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi); + +static MDBX_cmp_func mdbx_cmp_memn, mdbx_cmp_memnr, mdbx_cmp_int_align4, + mdbx_cmp_int_align2, mdbx_cmp_int_unaligned; + +static const char *__mdbx_strerr(int errnum) { + /* Table of descriptions for MDBX errors */ + static const char *const tbl[] = { + "MDBX_KEYEXIST: Key/data pair already exists", + "MDBX_NOTFOUND: No matching key/data pair found", + "MDBX_PAGE_NOTFOUND: Requested page not found", + "MDBX_CORRUPTED: Database is corrupted", + "MDBX_PANIC: Environment had fatal error", + "MDBX_VERSION_MISMATCH: DB version mismatch libmdbx", + "MDBX_INVALID: File is not an MDBX file", + "MDBX_MAP_FULL: Environment mapsize limit reached", + "MDBX_DBS_FULL: Too many DBI-handles (maxdbs reached)", + "MDBX_READERS_FULL: Too many readers (maxreaders reached)", + NULL /* MDBX_TLS_FULL (-30789): unused in MDBX */, + "MDBX_TXN_FULL: Transaction has too many dirty pages," + " i.e transaction is too big", + "MDBX_CURSOR_FULL: Cursor stack limit reachedn - this usually indicates" + " corruption, i.e branch-pages loop", + "MDBX_PAGE_FULL: Internal error - Page has no more space", + "MDBX_UNABLE_EXTEND_MAPSIZE: Database engine was unable to extend" + " mapping, e.g. since address space is unavailable or busy," + " or Operation system not supported such operations" + "MDBX_INCOMPATIBLE: Environment or database is not compatible" + " with the requested operation or the specified flags", + "MDBX_BAD_RSLOT: Invalid reuse of reader locktable slot," + " e.g. read-transaction already run for current thread", + "MDBX_BAD_TXN: Transaction is not valid for requested operation," + " e.g. had errored and be must aborted, has a child, or is invalid", + "MDBX_BAD_VALSIZE: Invalid size or alignment of key or data" + " for target database, either invalid subDB name", + "MDBX_BAD_DBI: The specified DBI-handle is invalid" + " or changed by another thread/transaction", + "MDBX_PROBLEM: Unexpected internal error, transaction should be aborted", + "MDBX_BUSY: Another write transaction is running," + " or environment is already used while opening with MDBX_EXCLUSIVE flag", + }; + + if (errnum >= MDBX_KEYEXIST && errnum <= MDBX_LAST_LMDB_ERRCODE) { + int i = errnum - MDBX_KEYEXIST; + return tbl[i]; + } + + switch (errnum) { + case MDBX_SUCCESS: + return "MDBX_SUCCESS: Successful"; + case MDBX_EMULTIVAL: + return "MDBX_EMULTIVAL: The specified key has" + " more than one associated value"; + case MDBX_EBADSIGN: + return "MDBX_EBADSIGN: Wrong signature of a runtime object(s)," + " e.g. memory corruption or double-free"; + case MDBX_WANNA_RECOVERY: + return "MDBX_WANNA_RECOVERY: Database should be recovered," + " but this could NOT be done automatically for now" + " since it opened in read-only mode"; + case MDBX_EKEYMISMATCH: + return "MDBX_EKEYMISMATCH: The given key value is mismatched to the" + " current cursor position"; + case MDBX_TOO_LARGE: + return "MDBX_TOO_LARGE: Database is too large for current system," + " e.g. could NOT be mapped into RAM"; + case MDBX_THREAD_MISMATCH: + return "MDBX_THREAD_MISMATCH: A thread has attempted to use a not" + " owned object, e.g. a transaction that started by another thread"; + case MDBX_TXN_OVERLAPPING: + return "MDBX_TXN_OVERLAPPING: Overlapping read and write transactions for" + " the current thread"; + default: + return NULL; + } +} + +const char *__cold mdbx_strerror_r(int errnum, char *buf, size_t buflen) { + const char *msg = __mdbx_strerr(errnum); + if (!msg && buflen > 0 && buflen < INT_MAX) { +#if defined(_WIN32) || defined(_WIN64) + const DWORD size = FormatMessageA( + FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, + errnum, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, (DWORD)buflen, + NULL); + return size ? buf : NULL; +#elif defined(_GNU_SOURCE) && defined(__GLIBC__) + /* GNU-specific */ + if (errnum > 0) + msg = strerror_r(errnum, buf, buflen); +#elif (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) + /* XSI-compliant */ + if (errnum > 0 && strerror_r(errnum, buf, buflen) == 0) + msg = buf; +#else + if (errnum > 0) { + msg = strerror(errnum); + if (msg) { + strncpy(buf, msg, buflen); + msg = buf; + } + } +#endif + if (!msg) { + (void)snprintf(buf, buflen, "error %d", errnum); + msg = buf; + } + buf[buflen - 1] = '\0'; + } + return msg; +} + +const char *__cold mdbx_strerror(int errnum) { +#if defined(_WIN32) || defined(_WIN64) + static char buf[1024]; + return mdbx_strerror_r(errnum, buf, sizeof(buf)); +#else + const char *msg = __mdbx_strerr(errnum); + if (!msg) { + if (errnum > 0) + msg = strerror(errnum); + if (!msg) { + static char buf[32]; + (void)snprintf(buf, sizeof(buf) - 1, "error %d", errnum); + msg = buf; + } + } + return msg; +#endif +} + +#if defined(_WIN32) || defined(_WIN64) /* Bit of madness for Windows */ +const char *mdbx_strerror_r_ANSI2OEM(int errnum, char *buf, size_t buflen) { + const char *msg = __mdbx_strerr(errnum); + if (!msg && buflen > 0 && buflen < INT_MAX) { + const DWORD size = FormatMessageA( + FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, + errnum, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, (DWORD)buflen, + NULL); + if (size && CharToOemBuffA(buf, buf, size)) + msg = buf; + } + return msg; +} + +const char *mdbx_strerror_ANSI2OEM(int errnum) { + static char buf[1024]; + return mdbx_strerror_r_ANSI2OEM(errnum, buf, sizeof(buf)); +} +#endif /* Bit of madness for Windows */ + +void __cold mdbx_debug_log(int level, const char *function, int line, + const char *fmt, ...) { + va_list args; + + va_start(args, fmt); + if (mdbx_debug_logger) + mdbx_debug_logger(level, function, line, fmt, args); + else { +#if defined(_WIN32) || defined(_WIN64) + if (IsDebuggerPresent()) { + int prefix_len = 0; + char *prefix = nullptr; + if (function && line > 0) + prefix_len = mdbx_asprintf(&prefix, "%s:%d ", function, line); + else if (function) + prefix_len = mdbx_asprintf(&prefix, "%s: ", function); + else if (line > 0) + prefix_len = mdbx_asprintf(&prefix, "%d: ", line); + if (prefix_len > 0 && prefix) { + OutputDebugStringA(prefix); + mdbx_free(prefix); + } + char *msg = nullptr; + int msg_len = mdbx_vasprintf(&msg, fmt, args); + if (msg_len > 0 && msg) { + OutputDebugStringA(msg); + mdbx_free(msg); + } + } +#else + if (function && line > 0) + fprintf(stderr, "%s:%d ", function, line); + else if (function) + fprintf(stderr, "%s: ", function); + else if (line > 0) + fprintf(stderr, "%d: ", line); + vfprintf(stderr, fmt, args); + fflush(stderr); +#endif + } + va_end(args); +} + +/* Dump a key in ascii or hexadecimal. */ +const char *mdbx_dump_val(const MDBX_val *key, char *const buf, + const size_t bufsize) { + if (!key) + return ""; + if (!buf || bufsize < 4) + return nullptr; + if (!key->iov_len) + return ""; + + const uint8_t *const data = key->iov_base; + bool is_ascii = true; + unsigned i; + for (i = 0; is_ascii && i < key->iov_len; i++) + if (data[i] < ' ' || data[i] > 127) + is_ascii = false; + + if (is_ascii) { + int len = + snprintf(buf, bufsize, "%.*s", + (key->iov_len > INT_MAX) ? INT_MAX : (int)key->iov_len, data); + assert(len > 0 && (unsigned)len < bufsize); + (void)len; + } else { + char *const detent = buf + bufsize - 2; + char *ptr = buf; + *ptr++ = '<'; + for (i = 0; i < key->iov_len; i++) { + const ptrdiff_t left = detent - ptr; + assert(left > 0); + int len = snprintf(ptr, left, "%02x", data[i]); + if (len < 0 || len >= left) + break; + ptr += len; + } + if (ptr < detent) { + ptr[0] = '>'; + ptr[1] = '\0'; + } + } + return buf; +} + +/*------------------------------------------------------------------------------ + LY: debug stuff */ + +static const char *mdbx_leafnode_type(MDBX_node *n) { + static const char *const tp[2][2] = {{"", ": DB"}, + {": sub-page", ": sub-DB"}}; + return F_ISSET(node_flags(n), F_BIGDATA) + ? ": overflow page" + : tp[F_ISSET(node_flags(n), F_DUPDATA)] + [F_ISSET(node_flags(n), F_SUBDATA)]; +} + +/* Display all the keys in the page. */ +static __maybe_unused void mdbx_page_list(MDBX_page *mp) { + pgno_t pgno = mp->mp_pgno; + const char *type, *state = IS_DIRTY(mp) ? ", dirty" : ""; + MDBX_node *node; + unsigned i, nkeys, nsize, total = 0; + MDBX_val key; + DKBUF; + + switch (mp->mp_flags & + (P_BRANCH | P_LEAF | P_LEAF2 | P_META | P_OVERFLOW | P_SUBP)) { + case P_BRANCH: + type = "Branch page"; + break; + case P_LEAF: + type = "Leaf page"; + break; + case P_LEAF | P_SUBP: + type = "Leaf sub-page"; + break; + case P_LEAF | P_LEAF2: + type = "Leaf2 page"; + break; + case P_LEAF | P_LEAF2 | P_SUBP: + type = "Leaf2 sub-page"; + break; + case P_OVERFLOW: + mdbx_verbose("Overflow page %" PRIaPGNO " pages %u%s\n", pgno, mp->mp_pages, + state); + return; + case P_META: + mdbx_verbose("Meta-page %" PRIaPGNO " txnid %" PRIu64 "\n", pgno, + page_meta(mp)->mm_txnid_a.inconsistent); + return; + default: + mdbx_verbose("Bad page %" PRIaPGNO " flags 0x%X\n", pgno, mp->mp_flags); + return; + } + + nkeys = page_numkeys(mp); + mdbx_verbose("%s %" PRIaPGNO " numkeys %u%s\n", type, pgno, nkeys, state); + + for (i = 0; i < nkeys; i++) { + if (IS_LEAF2(mp)) { /* LEAF2 pages have no mp_ptrs[] or node headers */ + key.iov_len = nsize = mp->mp_leaf2_ksize; + key.iov_base = page_leaf2key(mp, i, nsize); + total += nsize; + mdbx_verbose("key %u: nsize %u, %s\n", i, nsize, DKEY(&key)); + continue; + } + node = page_node(mp, i); + key.iov_len = node_ks(node); + key.iov_base = node->mn_data; + nsize = (unsigned)(NODESIZE + key.iov_len); + if (IS_BRANCH(mp)) { + mdbx_verbose("key %u: page %" PRIaPGNO ", %s\n", i, node_pgno(node), + DKEY(&key)); + total += nsize; + } else { + if (F_ISSET(node_flags(node), F_BIGDATA)) + nsize += sizeof(pgno_t); + else + nsize += (unsigned)node_ds(node); + total += nsize; + nsize += sizeof(indx_t); + mdbx_verbose("key %u: nsize %u, %s%s\n", i, nsize, DKEY(&key), + mdbx_leafnode_type(node)); + } + total = EVEN(total); + } + mdbx_verbose("Total: header %u + contents %u + unused %u\n", + IS_LEAF2(mp) ? PAGEHDRSZ : PAGEHDRSZ + mp->mp_lower, total, + page_room(mp)); +} + +/*----------------------------------------------------------------------------*/ + +/* Check if there is an inited xcursor, so XCURSOR_REFRESH() is proper */ +#define XCURSOR_INITED(mc) \ + ((mc)->mc_xcursor && ((mc)->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) + +/* Update sub-page pointer, if any, in mc->mc_xcursor. + * Needed when the node which contains the sub-page may have moved. + * Called with mp = mc->mc_pg[mc->mc_top], ki = mc->mc_ki[mc->mc_top]. */ +#define XCURSOR_REFRESH(mc, mp, ki) \ + do { \ + MDBX_page *xr_pg = (mp); \ + MDBX_node *xr_node = page_node(xr_pg, ki); \ + if ((node_flags(xr_node) & (F_DUPDATA | F_SUBDATA)) == F_DUPDATA) \ + (mc)->mc_xcursor->mx_cursor.mc_pg[0] = node_data(xr_node); \ + } while (0) + +/* Perform act while tracking temporary cursor mn */ +#define WITH_CURSOR_TRACKING(mn, act) \ + do { \ + mdbx_cassert(&(mn), \ + mn.mc_txn->mt_cursors != NULL /* must be not rdonly txt */); \ + MDBX_cursor mc_dummy, **tp = &(mn).mc_txn->mt_cursors[mn.mc_dbi]; \ + MDBX_cursor *tracked = &(mn); \ + if ((mn).mc_flags & C_SUB) { \ + mc_dummy.mc_flags = C_INITIALIZED; \ + mc_dummy.mc_xcursor = (MDBX_xcursor *)&(mn); \ + tracked = &mc_dummy; \ + } \ + tracked->mc_next = *tp; \ + *tp = tracked; \ + { act; } \ + *tp = tracked->mc_next; \ + } while (0) + +int mdbx_cmp(const MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, + const MDBX_val *b) { + mdbx_assert(NULL, txn->mt_signature == MDBX_MT_SIGNATURE); + return txn->mt_dbxs[dbi].md_cmp(a, b); +} + +int mdbx_dcmp(const MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, + const MDBX_val *b) { + mdbx_assert(NULL, txn->mt_signature == MDBX_MT_SIGNATURE); + return txn->mt_dbxs[dbi].md_dcmp(a, b); +} + +/* Allocate memory for a page. + * Re-use old malloc'd pages first for singletons, otherwise just malloc. + * Set MDBX_TXN_ERROR on failure. */ +static MDBX_page *mdbx_page_malloc(MDBX_txn *txn, unsigned num) { + MDBX_env *env = txn->mt_env; + MDBX_page *np = env->me_dpages; + size_t size = env->me_psize; + if (likely(num == 1 && np)) { + ASAN_UNPOISON_MEMORY_REGION(np, size); + VALGRIND_MEMPOOL_ALLOC(env, np, size); + VALGRIND_MAKE_MEM_DEFINED(&np->mp_next, sizeof(np->mp_next)); + env->me_dpages = np->mp_next; + } else { + size = pgno2bytes(env, num); + np = mdbx_malloc(size); + if (unlikely(!np)) { + txn->mt_flags |= MDBX_TXN_ERROR; + return np; + } + VALGRIND_MEMPOOL_ALLOC(env, np, size); + } + + if ((env->me_flags & MDBX_NOMEMINIT) == 0) { + /* For a single page alloc, we init everything after the page header. + * For multi-page, we init the final page; if the caller needed that + * many pages they will be filling in at least up to the last page. */ + size_t skip = PAGEHDRSZ; + if (num > 1) + skip += pgno2bytes(env, num - 1); + memset((char *)np + skip, 0, size - skip); + } +#if MDBX_DEBUG + np->mp_pgno = 0; +#endif + VALGRIND_MAKE_MEM_UNDEFINED(np, size); + np->mp_flags = 0; + np->mp_pages = num; + return np; +} + +/* Free a dirty page */ +static void mdbx_dpage_free(MDBX_env *env, MDBX_page *dp, unsigned pages) { +#if MDBX_DEBUG + dp->mp_pgno = MAX_PAGENO + 1; +#endif + if (pages == 1) { + dp->mp_next = env->me_dpages; + VALGRIND_MEMPOOL_FREE(env, dp); + env->me_dpages = dp; + } else { + /* large pages just get freed directly */ + VALGRIND_MEMPOOL_FREE(env, dp); + mdbx_free(dp); + } +} + +/* Return all dirty pages to dpage list */ +static void mdbx_dlist_free(MDBX_txn *txn) { + MDBX_env *env = txn->mt_env; + const MDBX_DPL dl = txn->tw.dirtylist; + const size_t n = dl->length; + + for (size_t i = 1; i <= n; i++) { + MDBX_page *dp = dl[i].ptr; + mdbx_dpage_free(env, dp, IS_OVERFLOW(dp) ? dp->mp_pages : 1); + } + + mdbx_dpl_clear(dl); +} + +static __always_inline MDBX_db *mdbx_outer_db(MDBX_cursor *mc) { + mdbx_cassert(mc, (mc->mc_flags & C_SUB) != 0); + MDBX_xcursor *mx = container_of(mc->mc_db, MDBX_xcursor, mx_db); + MDBX_cursor_couple *couple = container_of(mx, MDBX_cursor_couple, inner); + mdbx_cassert(mc, mc->mc_db == &couple->outer.mc_xcursor->mx_db); + mdbx_cassert(mc, mc->mc_dbx == &couple->outer.mc_xcursor->mx_dbx); + return couple->outer.mc_db; +} + +static __cold __maybe_unused bool mdbx_dirtylist_check(MDBX_txn *txn) { + if (!mdbx_audit_enabled()) + return true; + + unsigned loose = 0; + for (unsigned i = txn->tw.dirtylist->length; i > 0; --i) { + const MDBX_page *const dp = txn->tw.dirtylist[i].ptr; + if (!dp) + continue; + mdbx_tassert(txn, dp->mp_pgno == txn->tw.dirtylist[i].pgno); + if (unlikely(dp->mp_pgno != txn->tw.dirtylist[i].pgno)) + return false; + + mdbx_tassert(txn, dp->mp_flags & P_DIRTY); + if (unlikely((dp->mp_flags & P_DIRTY) == 0)) + return false; + if (dp->mp_flags & P_LOOSE) { + mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); + if (unlikely(dp->mp_flags != (P_LOOSE | P_DIRTY))) + return false; + loose += 1; + } + + const unsigned num = IS_OVERFLOW(dp) ? dp->mp_pages : 1; + mdbx_tassert(txn, txn->mt_next_pgno >= dp->mp_pgno + num); + if (unlikely(txn->mt_next_pgno < dp->mp_pgno + num)) + return false; + + if (i < txn->tw.dirtylist->sorted) { + mdbx_tassert(txn, txn->tw.dirtylist[i + 1].pgno >= dp->mp_pgno + num); + if (unlikely(txn->tw.dirtylist[i + 1].pgno < dp->mp_pgno + num)) + return false; + } + + const unsigned rpa = mdbx_pnl_search(txn->tw.reclaimed_pglist, dp->mp_pgno); + mdbx_tassert(txn, rpa > MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) || + txn->tw.reclaimed_pglist[rpa] != dp->mp_pgno); + if (rpa <= MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) && + unlikely(txn->tw.reclaimed_pglist[rpa] == dp->mp_pgno)) + return false; + if (num > 1) { + const unsigned rpb = + mdbx_pnl_search(txn->tw.reclaimed_pglist, dp->mp_pgno + num - 1); + mdbx_tassert(txn, rpa == rpb); + if (unlikely(rpa != rpb)) + return false; + } + } + + mdbx_tassert(txn, loose == txn->tw.loose_count); + if (unlikely(loose != txn->tw.loose_count)) + return false; + + if (txn->tw.dirtylist->length - txn->tw.dirtylist->sorted < 16) { + for (unsigned i = 1; i <= MDBX_PNL_SIZE(txn->tw.retired_pages); ++i) { + const MDBX_page *const dp = + mdbx_dpl_find(txn->tw.dirtylist, txn->tw.retired_pages[i]); + mdbx_tassert(txn, !dp); + if (unlikely(dp)) + return false; + } + } + + return true; +} + +static void mdbx_refund_reclaimed(MDBX_txn *txn) { + /* Scanning in descend order */ + pgno_t next_pgno = txn->mt_next_pgno; + const MDBX_PNL pnl = txn->tw.reclaimed_pglist; + mdbx_tassert(txn, MDBX_PNL_SIZE(pnl) && MDBX_PNL_MOST(pnl) == next_pgno - 1); +#if MDBX_PNL_ASCENDING + unsigned i = MDBX_PNL_SIZE(pnl); + mdbx_tassert(txn, pnl[i] == next_pgno - 1); + while (--next_pgno, --i > 0 && pnl[i] == next_pgno - 1) + ; + MDBX_PNL_SIZE(pnl) = i; +#else + unsigned i = 1; + mdbx_tassert(txn, pnl[i] == next_pgno - 1); + unsigned len = MDBX_PNL_SIZE(pnl); + while (--next_pgno, ++i <= len && pnl[i] == next_pgno - 1) + ; + MDBX_PNL_SIZE(pnl) = len -= i - 1; + for (unsigned move = 0; move < len; ++move) + pnl[1 + move] = pnl[i + move]; +#endif + mdbx_verbose("refunded %" PRIaPGNO " pages: %" PRIaPGNO " -> %" PRIaPGNO, + txn->mt_next_pgno - next_pgno, txn->mt_next_pgno, next_pgno); + txn->mt_next_pgno = next_pgno; + mdbx_tassert( + txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); +} + +static void mdbx_refund_loose(MDBX_txn *txn) { + mdbx_tassert(txn, mdbx_dirtylist_check(txn)); + mdbx_tassert(txn, txn->tw.loose_pages != nullptr); + mdbx_tassert(txn, txn->tw.loose_count > 0); + + const MDBX_DPL dl = txn->tw.dirtylist; + mdbx_tassert(txn, dl->length >= txn->tw.loose_count); + mdbx_tassert(txn, txn->tw.spill_pages == nullptr || + dl->length >= MDBX_PNL_SIZE(txn->tw.spill_pages)); + + pgno_t onstack[MDBX_CACHELINE_SIZE * 8 / sizeof(pgno_t)]; + MDBX_PNL suitable = onstack; + + if (dl->length - dl->sorted > txn->tw.loose_count) { + /* Dirty list is useless since unsorted. */ + if (bytes2pnl(sizeof(onstack)) < txn->tw.loose_count) { + suitable = mdbx_pnl_alloc(txn->tw.loose_count); + if (unlikely(!suitable)) + return /* this is not a reason for transaction fail */; + } + + /* Collect loose-pages which may be refunded. */ + mdbx_tassert(txn, txn->mt_next_pgno >= MIN_PAGENO + txn->tw.loose_count); + pgno_t most = MIN_PAGENO; + unsigned w = 0; + for (const MDBX_page *dp = txn->tw.loose_pages; dp; dp = dp->mp_next) { + mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); + mdbx_tassert(txn, txn->mt_next_pgno > dp->mp_pgno); + if (likely(txn->mt_next_pgno - txn->tw.loose_count <= dp->mp_pgno)) { + mdbx_tassert(txn, + w < ((suitable == onstack) ? bytes2pnl(sizeof(onstack)) + : MDBX_PNL_ALLOCLEN(suitable))); + suitable[++w] = dp->mp_pgno; + most = (dp->mp_pgno > most) ? dp->mp_pgno : most; + } + } + + if (most + 1 == txn->mt_next_pgno) { + /* Sort suitable list and refund pages at the tail. */ + MDBX_PNL_SIZE(suitable) = w; + mdbx_pnl_sort(suitable); + + /* Scanning in descend order */ + const int step = MDBX_PNL_ASCENDING ? -1 : 1; + const int begin = MDBX_PNL_ASCENDING ? MDBX_PNL_SIZE(suitable) : 1; + const int end = MDBX_PNL_ASCENDING ? 0 : MDBX_PNL_SIZE(suitable) + 1; + mdbx_tassert(txn, suitable[begin] >= suitable[end - step]); + mdbx_tassert(txn, most == suitable[begin]); + + for (int i = begin + step; i != end; i += step) { + if (suitable[i] != most - 1) + break; + most -= 1; + } + const unsigned refunded = txn->mt_next_pgno - most; + mdbx_verbose("refund-suitable %u pages %" PRIaPGNO " -> %" PRIaPGNO, + refunded, most, txn->mt_next_pgno); + txn->tw.loose_count -= refunded; + txn->tw.dirtyroom += refunded; + txn->mt_next_pgno = most; + + /* Filter-out dirty list */ + unsigned r = 0; + w = 0; + if (dl->sorted) { + do { + if (dl[++r].pgno < most) { + if (++w != r) + dl[w] = dl[r]; + } + } while (r < dl->sorted); + dl->sorted = w; + } + while (r < dl->length) { + if (dl[++r].pgno < most) { + if (++w != r) + dl[w] = dl[r]; + } + } + dl->length = w; + mdbx_tassert(txn, txn->mt_parent || + txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + goto unlink_loose; + } + } else { + /* Dirtylist is mostly sorted, just refund loose pages at the end. */ + mdbx_dpl_sort(dl); + mdbx_tassert(txn, dl->length < 2 || dl[1].pgno < dl[dl->length].pgno); + mdbx_tassert(txn, dl->sorted == dl->length); + + /* Scan dirtylist tail-forward and cutoff suitable pages. */ + while (dl->length && dl[dl->length].pgno == txn->mt_next_pgno - 1 && + dl[dl->length].ptr->mp_flags == (P_LOOSE | P_DIRTY)) { + MDBX_page *dp = dl[dl->length].ptr; + mdbx_verbose("refund-sorted page %" PRIaPGNO, dp->mp_pgno); + mdbx_tassert(txn, dp->mp_pgno == dl[dl->length].pgno); + dl->length -= 1; + } + + if (dl->sorted != dl->length) { + const unsigned refunded = dl->sorted - dl->length; + dl->sorted = dl->length; + txn->tw.loose_count -= refunded; + txn->tw.dirtyroom += refunded; + txn->mt_next_pgno -= refunded; + mdbx_tassert(txn, txn->mt_parent || + txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + + /* Filter-out loose chain & dispose refunded pages. */ + unlink_loose: + for (MDBX_page **link = &txn->tw.loose_pages; *link;) { + MDBX_page *dp = *link; + mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); + if (txn->mt_next_pgno > dp->mp_pgno) { + link = &dp->mp_next; + } else { + *link = dp->mp_next; + if ((txn->mt_flags & MDBX_WRITEMAP) == 0) + mdbx_dpage_free(txn->mt_env, dp, 1); + } + } + } + } + + mdbx_tassert(txn, mdbx_dirtylist_check(txn)); + mdbx_tassert(txn, txn->mt_parent || + txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + if (suitable != onstack) + mdbx_pnl_free(suitable); + txn->tw.loose_refund_wl = txn->mt_next_pgno; +} + +static bool mdbx_refund(MDBX_txn *txn) { + const pgno_t before = txn->mt_next_pgno; + + if (txn->tw.loose_pages && txn->tw.loose_refund_wl > txn->mt_next_pgno) + mdbx_refund_loose(txn); + + while (true) { + if (MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) == 0 || + MDBX_PNL_MOST(txn->tw.reclaimed_pglist) != txn->mt_next_pgno - 1) + break; + + mdbx_refund_reclaimed(txn); + if (!txn->tw.loose_pages || txn->tw.loose_refund_wl <= txn->mt_next_pgno) + break; + + const pgno_t memo = txn->mt_next_pgno; + mdbx_refund_loose(txn); + if (memo == txn->mt_next_pgno) + break; + } + + return before != txn->mt_next_pgno; +} + +static __cold void mdbx_kill_page(MDBX_env *env, MDBX_page *mp, pgno_t pgno, + unsigned npages) { + mdbx_assert(env, pgno >= NUM_METAS && npages); + if (IS_DIRTY(mp) || (env->me_flags & MDBX_WRITEMAP)) { + const size_t bytes = pgno2bytes(env, npages); + memset(mp, -1, bytes); + mp->mp_pgno = pgno; + if ((env->me_flags & MDBX_WRITEMAP) == 0) + mdbx_pwrite(env->me_lazy_fd, mp, bytes, pgno2bytes(env, pgno)); + } else { + struct iovec iov[MDBX_COMMIT_PAGES]; + iov[0].iov_len = env->me_psize; + iov[0].iov_base = (char *)env->me_pbuf + env->me_psize; + size_t iov_off = pgno2bytes(env, pgno); + unsigned n = 1; + while (--npages) { + iov[n] = iov[0]; + if (++n == MDBX_COMMIT_PAGES) { + mdbx_pwritev(env->me_lazy_fd, iov, MDBX_COMMIT_PAGES, iov_off, + pgno2bytes(env, MDBX_COMMIT_PAGES)); + iov_off += pgno2bytes(env, MDBX_COMMIT_PAGES); + n = 0; + } + } + mdbx_pwritev(env->me_lazy_fd, iov, n, iov_off, pgno2bytes(env, n)); + } +} + +/* Retire, loosen or free a single page. + * + * Saves single pages to a list for future reuse + * in this same txn. It has been pulled from the GC + * and already resides on the dirty list, but has been + * deleted. Use these pages first before pulling again + * from the GC. + * + * If the page wasn't dirtied in this txn, just add it + * to this txn's free list. */ + +static int mdbx_page_loose(MDBX_txn *txn, MDBX_page *mp) { + const unsigned npages = IS_OVERFLOW(mp) ? mp->mp_pages : 1; + const pgno_t pgno = mp->mp_pgno; + + mp->mp_txnid = INVALID_TXNID; + if (txn->mt_parent) { + mdbx_tassert(txn, (txn->mt_env->me_flags & MDBX_WRITEMAP) == 0); + mdbx_tassert(txn, mp != pgno2page(txn->mt_env, pgno)); + /* If txn has a parent, make sure the page is in our dirty list. */ + MDBX_page *dp = mdbx_dpl_find(txn->tw.dirtylist, pgno); + /* TODO: use extended flag-mask to track parent's dirty-pages */ + if (dp == nullptr) { + mp->mp_next = txn->tw.retired2parent_pages; + txn->tw.retired2parent_pages = mp; + txn->tw.retired2parent_count += npages; + return MDBX_SUCCESS; + } + if (unlikely(mp != dp)) { /* bad cursor? */ + mdbx_error( + "wrong page 0x%p #%" PRIaPGNO " in the dirtylist, expecting %p", + __Wpedantic_format_voidptr(dp), pgno, __Wpedantic_format_voidptr(mp)); + txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_PROBLEM; + } + /* ok, it's ours */ + } + + mdbx_debug("loosen page %" PRIaPGNO, pgno); + const bool is_dirty = IS_DIRTY(mp); + if (MDBX_DEBUG || unlikely((txn->mt_env->me_flags & MDBX_PAGEPERTURB) != 0)) { + mdbx_kill_page(txn->mt_env, mp, pgno, npages); + VALGRIND_MAKE_MEM_UNDEFINED(mp, PAGEHDRSZ); + } + VALGRIND_MAKE_MEM_NOACCESS(page_data(mp), + pgno2bytes(txn->mt_env, npages) - PAGEHDRSZ); + ASAN_POISON_MEMORY_REGION(page_data(mp), + pgno2bytes(txn->mt_env, npages) - PAGEHDRSZ); + + if (unlikely(npages > + 1 /* overflow pages doesn't comes to the loose-list */)) { + if (is_dirty) { + /* Remove from dirty list */ + MDBX_page *dp = mdbx_dpl_remove(txn->tw.dirtylist, pgno); + if (unlikely(dp != mp)) { + mdbx_error("not found page 0x%p #%" PRIaPGNO " in the dirtylist", + __Wpedantic_format_voidptr(mp), pgno); + txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_PROBLEM; + } + txn->tw.dirtyroom++; + mdbx_tassert(txn, txn->mt_parent || + txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + if ((txn->mt_flags & MDBX_WRITEMAP) == 0) + mdbx_dpage_free(txn->mt_env, mp, npages); + } + + if (unlikely(pgno + npages == txn->mt_next_pgno)) { + txn->mt_next_pgno = pgno; + mdbx_refund(txn); + return MDBX_SUCCESS; + } + + int rc = mdbx_pnl_insert_range(&txn->tw.reclaimed_pglist, pgno, npages); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + return MDBX_SUCCESS; + } + + mp->mp_flags = P_LOOSE | P_DIRTY; + mp->mp_next = txn->tw.loose_pages; + txn->tw.loose_pages = mp; + txn->tw.loose_count++; + if (unlikely(txn->mt_next_pgno == mp->mp_pgno + 1)) + mdbx_refund(txn); + + return MDBX_SUCCESS; +} + +static int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp) { + const unsigned npages = IS_OVERFLOW(mp) ? mp->mp_pages : 1; + const pgno_t pgno = mp->mp_pgno; + MDBX_txn *const txn = mc->mc_txn; + + if (unlikely(mc->mc_flags & C_SUB)) { + MDBX_db *outer = mdbx_outer_db(mc); + mdbx_cassert(mc, !IS_BRANCH(mp) || outer->md_branch_pages > 0); + outer->md_branch_pages -= IS_BRANCH(mp); + mdbx_cassert(mc, !IS_LEAF(mp) || outer->md_leaf_pages > 0); + outer->md_leaf_pages -= IS_LEAF(mp); + mdbx_cassert(mc, !IS_OVERFLOW(mp)); + } + mdbx_cassert(mc, !IS_BRANCH(mp) || mc->mc_db->md_branch_pages > 0); + mc->mc_db->md_branch_pages -= IS_BRANCH(mp); + mdbx_cassert(mc, !IS_LEAF(mp) || mc->mc_db->md_leaf_pages > 0); + mc->mc_db->md_leaf_pages -= IS_LEAF(mp); + mdbx_cassert(mc, !IS_OVERFLOW(mp) || mc->mc_db->md_overflow_pages >= npages); + mc->mc_db->md_overflow_pages -= IS_OVERFLOW(mp) ? npages : 0; + + if (IS_DIRTY(mp)) { + int rc = mdbx_page_loose(txn, mp); + if (unlikely(rc != MDBX_SUCCESS)) + mc->mc_flags &= ~(C_INITIALIZED | C_EOF); + return rc; + } + + if (txn->tw.spill_pages) { + const unsigned i = mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1); + if (i) { + /* This page is no longer spilled */ + mdbx_tassert(txn, i == MDBX_PNL_SIZE(txn->tw.spill_pages) || + txn->tw.spill_pages[i + 1] >= (pgno + npages) << 1); + txn->tw.spill_pages[i] |= 1; + if (i == MDBX_PNL_SIZE(txn->tw.spill_pages)) + MDBX_PNL_SIZE(txn->tw.spill_pages) -= 1; + int rc = mdbx_page_loose(txn, mp); + if (unlikely(rc != MDBX_SUCCESS)) + mc->mc_flags &= ~(C_INITIALIZED | C_EOF); + return rc; + } + } + + mdbx_tassert(txn, mp == pgno2page(txn->mt_env, pgno)); + int rc = mdbx_pnl_append_range(&txn->tw.retired_pages, pgno, npages); + mdbx_tassert(txn, mdbx_dpl_find(txn->tw.dirtylist, pgno) == nullptr); + return rc; +} + +static __must_check_result __always_inline int +mdbx_retire_pgno(MDBX_cursor *mc, const pgno_t pgno) { + MDBX_page *mp; + int rc = mdbx_page_get(mc, pgno, &mp, NULL); + if (likely(rc == MDBX_SUCCESS)) + rc = mdbx_page_retire(mc, mp); + return rc; +} + +/* Set or clear P_KEEP in dirty, non-overflow, non-sub pages watched by txn. + * + * [in] mc A cursor handle for the current operation. + * [in] pflags Flags of the pages to update: + * - P_DIRTY to set P_KEEP, + * - P_DIRTY|P_KEEP to clear it. + * [in] all No shortcuts. Needed except after a full mdbx_page_flush(). + * + * Returns 0 on success, non-zero on failure. */ +static int mdbx_pages_xkeep(MDBX_cursor *mc, unsigned pflags, bool all) { + const unsigned Mask = P_SUBP | P_DIRTY | P_LOOSE | P_KEEP; + MDBX_txn *txn = mc->mc_txn; + MDBX_cursor *m3, *m0 = mc; + MDBX_xcursor *mx; + MDBX_page *dp, *mp; + unsigned i, j; + int rc = MDBX_SUCCESS; + + /* Mark pages seen by cursors: First m0, then tracked cursors */ + for (i = txn->mt_numdbs;;) { + if (mc->mc_flags & C_INITIALIZED) { + for (m3 = mc;; m3 = &mx->mx_cursor) { + mp = NULL; + for (j = 0; j < m3->mc_snum; j++) { + mp = m3->mc_pg[j]; + if ((mp->mp_flags & Mask) == pflags) + mp->mp_flags ^= P_KEEP; + } + mx = m3->mc_xcursor; + /* Proceed to mx if it is at a sub-database */ + if (!(mx && (mx->mx_cursor.mc_flags & C_INITIALIZED))) + break; + if (!(mp && IS_LEAF(mp))) + break; + if (!(node_flags(page_node(mp, m3->mc_ki[j - 1])) & F_SUBDATA)) + break; + } + } + mc = mc->mc_next; + for (; !mc || mc == m0; mc = txn->mt_cursors[--i]) + if (i == 0) + goto mark_done; + } + +mark_done: + if (all) { + /* Mark dirty root pages */ + for (i = 0; i < txn->mt_numdbs; i++) { + if (txn->mt_dbflags[i] & DB_DIRTY) { + pgno_t pgno = txn->mt_dbs[i].md_root; + if (pgno == P_INVALID) + continue; + int level; + if (unlikely((rc = mdbx_page_get(m0, pgno, &dp, &level)) != + MDBX_SUCCESS)) + break; + if ((dp->mp_flags & Mask) == pflags && level <= 1) + dp->mp_flags ^= P_KEEP; + } + } + } + + return rc; +} + +/* Spill pages from the dirty list back to disk. + * This is intended to prevent running into MDBX_TXN_FULL situations, + * but note that they may still occur in a few cases: + * + * 1) our estimate of the txn size could be too small. Currently this + * seems unlikely, except with a large number of MDBX_MULTIPLE items. + * + * 2) child txns may run out of space if their parents dirtied a + * lot of pages and never spilled them. TODO: we probably should do + * a preemptive spill during mdbx_txn_begin() of a child txn, if + * the parent's dirtyroom is below a given threshold. + * + * Otherwise, if not using nested txns, it is expected that apps will + * not run into MDBX_TXN_FULL any more. The pages are flushed to disk + * the same way as for a txn commit, e.g. their P_DIRTY flag is cleared. + * If the txn never references them again, they can be left alone. + * If the txn only reads them, they can be used without any fuss. + * If the txn writes them again, they can be dirtied immediately without + * going thru all of the work of mdbx_page_touch(). Such references are + * handled by mdbx_page_unspill(). + * + * Also note, we never spill DB root pages, nor pages of active cursors, + * because we'll need these back again soon anyway. And in nested txns, + * we can't spill a page in a child txn if it was already spilled in a + * parent txn. That would alter the parent txns' data even though + * the child hasn't committed yet, and we'd have no way to undo it if + * the child aborted. + * + * [in] mc cursor A cursor handle identifying the transaction and + * database for which we are checking space. + * [in] key For a put operation, the key being stored. + * [in] data For a put operation, the data being stored. + * + * Returns 0 on success, non-zero on failure. */ +static int mdbx_page_spill(MDBX_cursor *mc, const MDBX_val *key, + const MDBX_val *data) { + if (mc->mc_flags & C_SUB) + return MDBX_SUCCESS; + + MDBX_txn *txn = mc->mc_txn; + MDBX_DPL dl = txn->tw.dirtylist; + + /* Estimate how much space this op will take */ + pgno_t i = mc->mc_db->md_depth; + /* Named DBs also dirty the main DB */ + if (mc->mc_dbi >= CORE_DBS) + i += txn->mt_dbs[MAIN_DBI].md_depth; + /* For puts, roughly factor in the key+data size */ + if (key) + i += bytes2pgno(txn->mt_env, node_size(key, data) + txn->mt_env->me_psize); + i += i; /* double it for good measure */ + pgno_t need = i; + + if (txn->tw.dirtyroom > i) + return MDBX_SUCCESS; + + if (!txn->tw.spill_pages) { + txn->tw.spill_pages = mdbx_pnl_alloc(MDBX_DPL_TXNFULL / 8); + if (unlikely(!txn->tw.spill_pages)) + return MDBX_ENOMEM; + } else { + /* purge deleted slots */ + MDBX_PNL sl = txn->tw.spill_pages; + pgno_t num = MDBX_PNL_SIZE(sl), j = 0; + for (i = 1; i <= num; i++) { + if ((sl[i] & 1) == 0) + sl[++j] = sl[i]; + } + MDBX_PNL_SIZE(sl) = j; + } + + /* Preserve pages which may soon be dirtied again */ + int rc = mdbx_pages_xkeep(mc, P_DIRTY, true); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + /* Less aggressive spill - we originally spilled the entire dirty list, + * with a few exceptions for cursor pages and DB root pages. But this + * turns out to be a lot of wasted effort because in a large txn many + * of those pages will need to be used again. So now we spill only 1/8th + * of the dirty pages. Testing revealed this to be a good tradeoff, + * better than 1/2, 1/4, or 1/10. */ + if (need < MDBX_DPL_TXNFULL / 8) + need = MDBX_DPL_TXNFULL / 8; + + /* Save the page IDs of all the pages we're flushing */ + /* flush from the tail forward, this saves a lot of shifting later on. */ + for (i = dl->length; i && need; i--) { + pgno_t pn = dl[i].pgno << 1; + MDBX_page *dp = dl[i].ptr; + if (dp->mp_flags & (P_LOOSE | P_KEEP)) + continue; + /* Can't spill twice, + * make sure it's not already in a parent's spill list. */ + if (txn->mt_parent) { + MDBX_txn *parent; + for (parent = txn->mt_parent; parent; parent = parent->mt_parent) { + if (parent->tw.spill_pages && + mdbx_pnl_exist(parent->tw.spill_pages, pn)) { + dp->mp_flags |= P_KEEP; + break; + } + } + if (parent) + continue; + } + rc = mdbx_pnl_append(&txn->tw.spill_pages, pn); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + need--; + } + mdbx_pnl_sort(txn->tw.spill_pages); + + /* Flush the spilled part of dirty list */ + rc = mdbx_page_flush(txn, i); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + /* Reset any dirty pages we kept that page_flush didn't see */ + rc = mdbx_pages_xkeep(mc, P_DIRTY | P_KEEP, i != 0); + +bailout: + txn->mt_flags |= rc ? MDBX_TXN_ERROR : MDBX_TXN_SPILLS; + return rc; +} + +/*----------------------------------------------------------------------------*/ + +static __always_inline bool meta_bootid_match(const MDBX_meta *meta) { + return meta->mm_bootid.x == bootid.x && meta->mm_bootid.y == bootid.y && + (bootid.x | bootid.y) != 0; +} + +static bool meta_weak_acceptable(const MDBX_env *env, const MDBX_meta *meta, + const int lck_exlusive) { + return lck_exlusive ? /* exclusive lock */ meta_bootid_match(meta) + : /* db already opened */ env->me_lck && + (env->me_lck->mti_envmode & MDBX_RDONLY) == 0; +} + +#define METAPAGE(env, n) page_meta(pgno2page(env, n)) +#define METAPAGE_END(env) METAPAGE(env, NUM_METAS) + +static __inline txnid_t meta_txnid(const MDBX_env *env, const MDBX_meta *meta, + const bool allow_volatile) { + mdbx_assert(env, meta >= METAPAGE(env, 0) || meta < METAPAGE_END(env)); + txnid_t a = safe64_read(&meta->mm_txnid_a); + txnid_t b = safe64_read(&meta->mm_txnid_b); + if (allow_volatile) + return (a == b) ? a : 0; + mdbx_assert(env, a == b); + return a; +} + +static __inline txnid_t mdbx_meta_txnid_stable(const MDBX_env *env, + const MDBX_meta *meta) { + return meta_txnid(env, meta, false); +} + +static __inline txnid_t mdbx_meta_txnid_fluid(const MDBX_env *env, + const MDBX_meta *meta) { + return meta_txnid(env, meta, true); +} + +static __inline void mdbx_meta_update_begin(const MDBX_env *env, + MDBX_meta *meta, txnid_t txnid) { + mdbx_assert(env, meta >= METAPAGE(env, 0) || meta < METAPAGE_END(env)); + mdbx_assert(env, meta->mm_txnid_a.inconsistent < txnid && + meta->mm_txnid_b.inconsistent < txnid); + (void)env; + safe64_update(&meta->mm_txnid_a, txnid); +} + +static __inline void mdbx_meta_update_end(const MDBX_env *env, MDBX_meta *meta, + txnid_t txnid) { + mdbx_assert(env, meta >= METAPAGE(env, 0) || meta < METAPAGE_END(env)); + mdbx_assert(env, meta->mm_txnid_a.inconsistent == txnid); + mdbx_assert(env, meta->mm_txnid_b.inconsistent < txnid); + (void)env; + mdbx_jitter4testing(true); + meta->mm_bootid = bootid; + safe64_update(&meta->mm_txnid_b, txnid); +} + +static __inline void mdbx_meta_set_txnid(const MDBX_env *env, MDBX_meta *meta, + txnid_t txnid) { + mdbx_assert(env, meta < METAPAGE(env, 0) || meta > METAPAGE_END(env)); + (void)env; + /* update inconsistent since this function used ONLY for filling meta-image + * for writing, but not the actual meta-page */ + meta->mm_bootid = bootid; + meta->mm_txnid_a.inconsistent = txnid; + meta->mm_txnid_b.inconsistent = txnid; +} + +static __inline uint64_t mdbx_meta_sign(const MDBX_meta *meta) { + uint64_t sign = MDBX_DATASIGN_NONE; +#if 0 /* TODO */ + sign = hippeus_hash64(...); +#else + (void)meta; +#endif + /* LY: newer returns MDBX_DATASIGN_NONE or MDBX_DATASIGN_WEAK */ + return (sign > MDBX_DATASIGN_WEAK) ? sign : ~sign; +} + +enum meta_choise_mode { prefer_last, prefer_steady }; + +static __inline bool mdbx_meta_ot(const enum meta_choise_mode mode, + const MDBX_env *env, const MDBX_meta *a, + const MDBX_meta *b) { + mdbx_jitter4testing(true); + txnid_t txnid_a = mdbx_meta_txnid_fluid(env, a); + txnid_t txnid_b = mdbx_meta_txnid_fluid(env, b); + + mdbx_jitter4testing(true); + switch (mode) { + default: + assert(false); + __unreachable(); + /* fall through */ + __fallthrough; + case prefer_steady: + if (META_IS_STEADY(a) != META_IS_STEADY(b)) + return META_IS_STEADY(b); + /* fall through */ + __fallthrough; + case prefer_last: + mdbx_jitter4testing(true); + if (txnid_a == txnid_b) + return META_IS_STEADY(b); + return txnid_a < txnid_b; + } +} + +static __inline bool mdbx_meta_eq(const MDBX_env *env, const MDBX_meta *a, + const MDBX_meta *b) { + mdbx_jitter4testing(true); + const txnid_t txnid = mdbx_meta_txnid_fluid(env, a); + if (!txnid || txnid != mdbx_meta_txnid_fluid(env, b)) + return false; + + mdbx_jitter4testing(true); + if (META_IS_STEADY(a) != META_IS_STEADY(b)) + return false; + + mdbx_jitter4testing(true); + return true; +} + +static int mdbx_meta_eq_mask(const MDBX_env *env) { + MDBX_meta *m0 = METAPAGE(env, 0); + MDBX_meta *m1 = METAPAGE(env, 1); + MDBX_meta *m2 = METAPAGE(env, 2); + + int rc = mdbx_meta_eq(env, m0, m1) ? 1 : 0; + if (mdbx_meta_eq(env, m1, m2)) + rc += 2; + if (mdbx_meta_eq(env, m2, m0)) + rc += 4; + return rc; +} + +static __inline MDBX_meta *mdbx_meta_recent(const enum meta_choise_mode mode, + const MDBX_env *env, MDBX_meta *a, + MDBX_meta *b) { + const bool a_older_that_b = mdbx_meta_ot(mode, env, a, b); + mdbx_assert(env, !mdbx_meta_eq(env, a, b)); + return a_older_that_b ? b : a; +} + +static __inline MDBX_meta *mdbx_meta_ancient(const enum meta_choise_mode mode, + const MDBX_env *env, MDBX_meta *a, + MDBX_meta *b) { + const bool a_older_that_b = mdbx_meta_ot(mode, env, a, b); + mdbx_assert(env, !mdbx_meta_eq(env, a, b)); + return a_older_that_b ? a : b; +} + +static __inline MDBX_meta * +mdbx_meta_mostrecent(const enum meta_choise_mode mode, const MDBX_env *env) { + MDBX_meta *m0 = METAPAGE(env, 0); + MDBX_meta *m1 = METAPAGE(env, 1); + MDBX_meta *m2 = METAPAGE(env, 2); + + MDBX_meta *head = mdbx_meta_recent(mode, env, m0, m1); + head = mdbx_meta_recent(mode, env, head, m2); + return head; +} + +static MDBX_meta *mdbx_meta_steady(const MDBX_env *env) { + return mdbx_meta_mostrecent(prefer_steady, env); +} + +static MDBX_meta *mdbx_meta_head(const MDBX_env *env) { + return mdbx_meta_mostrecent(prefer_last, env); +} + +static txnid_t mdbx_recent_committed_txnid(const MDBX_env *env) { + while (true) { + const MDBX_meta *head = mdbx_meta_head(env); + const txnid_t recent = mdbx_meta_txnid_fluid(env, head); + mdbx_compiler_barrier(); + if (likely(head == mdbx_meta_head(env) && + recent == mdbx_meta_txnid_fluid(env, head))) + return recent; + } +} + +static txnid_t mdbx_recent_steady_txnid(const MDBX_env *env) { + while (true) { + const MDBX_meta *head = mdbx_meta_steady(env); + const txnid_t recent = mdbx_meta_txnid_fluid(env, head); + mdbx_compiler_barrier(); + if (likely(head == mdbx_meta_steady(env) && + recent == mdbx_meta_txnid_fluid(env, head))) + return recent; + } +} + +static const char *mdbx_durable_str(const MDBX_meta *const meta) { + if (META_IS_STEADY(meta)) + return (meta->mm_datasync_sign == mdbx_meta_sign(meta)) ? "Steady" + : "Tainted"; + return "Weak"; +} + +/*----------------------------------------------------------------------------*/ + +/* Find oldest txnid still referenced. */ +static txnid_t mdbx_find_oldest(const MDBX_txn *txn) { + mdbx_tassert(txn, (txn->mt_flags & MDBX_RDONLY) == 0); + MDBX_env *env = txn->mt_env; + const txnid_t edge = mdbx_recent_steady_txnid(env); + mdbx_tassert(txn, edge <= txn->mt_txnid); + + MDBX_lockinfo *const lck = env->me_lck; + if (unlikely(lck == NULL /* exclusive mode */)) + return env->me_lckless_stub.oldest = edge; + + const txnid_t last_oldest = lck->mti_oldest_reader; + mdbx_tassert(txn, edge >= last_oldest); + if (likely(last_oldest == edge)) + return edge; + + const uint32_t nothing_changed = MDBX_STRING_TETRAD("None"); + const uint32_t snap_readers_refresh_flag = lck->mti_readers_refresh_flag; + mdbx_jitter4testing(false); + if (snap_readers_refresh_flag == nothing_changed) + return last_oldest; + + txnid_t oldest = edge; + lck->mti_readers_refresh_flag = nothing_changed; + mdbx_flush_incoherent_cpu_writeback(); + const unsigned snap_nreaders = lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; ++i) { + if (lck->mti_readers[i].mr_pid) { + /* mdbx_jitter4testing(true); */ + const txnid_t snap = safe64_read(&lck->mti_readers[i].mr_txnid); + if (oldest > snap && last_oldest <= /* ignore pending updates */ snap) { + oldest = snap; + if (oldest == last_oldest) + return oldest; + } + } + } + + if (oldest != last_oldest) { + mdbx_notice("update oldest %" PRIaTXN " -> %" PRIaTXN, last_oldest, oldest); + mdbx_tassert(txn, oldest >= lck->mti_oldest_reader); + lck->mti_oldest_reader = oldest; + } + return oldest; +} + +/* Find largest mvcc-snapshot still referenced. */ +static __cold pgno_t mdbx_find_largest(MDBX_env *env, pgno_t largest) { + MDBX_lockinfo *const lck = env->me_lck; + if (likely(lck != NULL /* exclusive mode */)) { + const unsigned snap_nreaders = lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; ++i) { + retry: + if (lck->mti_readers[i].mr_pid) { + /* mdbx_jitter4testing(true); */ + const pgno_t snap_pages = lck->mti_readers[i].mr_snapshot_pages_used; + const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); + mdbx_memory_barrier(); + if (unlikely(snap_pages != lck->mti_readers[i].mr_snapshot_pages_used || + snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) + goto retry; + if (largest < snap_pages && + lck->mti_oldest_reader <= /* ignore pending updates */ snap_txnid && + snap_txnid <= env->me_txn0->mt_txnid) + largest = snap_pages; + } + } + } + + return largest; +} + +/* Add a page to the txn's dirty list */ +static int __must_check_result mdbx_page_dirty(MDBX_txn *txn, MDBX_page *mp) { + mp->mp_txnid = INVALID_TXNID; + mp->mp_flags |= P_DIRTY; + const int rc = mdbx_dpl_append(txn->tw.dirtylist, mp->mp_pgno, mp); + if (unlikely(rc != MDBX_SUCCESS)) { + txn->mt_flags |= MDBX_TXN_ERROR; + return rc; + } + txn->tw.dirtyroom--; + mdbx_tassert(txn, txn->mt_parent || + txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + return MDBX_SUCCESS; +} + +#if !(defined(_WIN32) || defined(_WIN64)) +static __always_inline __maybe_unused int ignore_enosys(int err) { +#ifdef ENOSYS + if (err == ENOSYS) + return MDBX_RESULT_TRUE; +#endif /* ENOSYS */ +#ifdef ENOIMPL + if (err == ENOIMPL) + return MDBX_RESULT_TRUE; +#endif /* ENOIMPL */ +#ifdef ENOTSUP + if (err == ENOTSUP) + return MDBX_RESULT_TRUE; +#endif /* ENOTSUP */ +#ifdef ENOSUPP + if (err == ENOSUPP) + return MDBX_RESULT_TRUE; +#endif /* ENOSUPP */ +#ifdef EOPNOTSUPP + if (err == EOPNOTSUPP) + return MDBX_RESULT_TRUE; +#endif /* EOPNOTSUPP */ + if (err == EAGAIN) + return MDBX_RESULT_TRUE; + return err; +} +#endif /* defined(_WIN32) || defined(_WIN64) */ + +/* Turn on/off readahead. It's harmful when the DB is larger than RAM. */ +static int __cold mdbx_set_readahead(MDBX_env *env, const size_t offset, + const size_t length, const bool enable) { + assert(length > 0); + mdbx_notice("readahead %s %u..%u", enable ? "ON" : "OFF", + bytes2pgno(env, offset), bytes2pgno(env, offset + length)); + +#if defined(F_RDAHEAD) + if (unlikely(fcntl(env->me_lazy_fd, F_RDAHEAD, enable) == -1)) + return errno; +#endif /* F_RDAHEAD */ + + if (enable) { +#if defined(F_RDADVISE) + struct radvisory hint; + hint.ra_offset = offset; + hint.ra_count = length; + (void)/* Ignore ENOTTY for DB on the ram-disk and so on */ fcntl( + env->me_lazy_fd, F_RDADVISE, &hint); +#endif /* F_RDADVISE */ +#if defined(MADV_WILLNEED) + int err = madvise(env->me_map + offset, length, MADV_WILLNEED) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#elif defined(POSIX_MADV_WILLNEED) + int err = ignore_enosys( + posix_madvise(env->me_map + offset, length, POSIX_MADV_WILLNEED)); + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#elif defined(_WIN32) || defined(_WIN64) + if (mdbx_PrefetchVirtualMemory) { + WIN32_MEMORY_RANGE_ENTRY hint; + hint.VirtualAddress = env->me_map + offset; + hint.NumberOfBytes = length; + (void)mdbx_PrefetchVirtualMemory(GetCurrentProcess(), 1, &hint, 0); + } +#elif defined(POSIX_FADV_WILLNEED) + int err = ignore_enosys( + posix_fadvise(env->me_lazy_fd, offset, length, POSIX_FADV_WILLNEED)); + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#endif /* MADV_WILLNEED */ + } else { +#if defined(MADV_RANDOM) + int err = madvise(env->me_map + offset, length, MADV_RANDOM) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#elif defined(POSIX_MADV_RANDOM) + int err = ignore_enosys( + posix_madvise(env->me_map + offset, length, POSIX_MADV_RANDOM)); + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#elif defined(POSIX_FADV_RANDOM) + int err = ignore_enosys( + posix_fadvise(env->me_lazy_fd, offset, length, POSIX_FADV_RANDOM)); + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#endif /* MADV_RANDOM */ + } + return MDBX_SUCCESS; +} + +static __cold int mdbx_mapresize(MDBX_env *env, const pgno_t used_pgno, + const pgno_t size_pgno, + const pgno_t limit_pgno) { + if ((env->me_flags & MDBX_WRITEMAP) && *env->me_unsynced_pages) { + int err = mdbx_msync(&env->me_dxb_mmap, 0, + pgno_align2os_bytes(env, used_pgno), true); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + + const size_t limit_bytes = pgno_align2os_bytes(env, limit_pgno); + const size_t size_bytes = pgno_align2os_bytes(env, size_pgno); + + mdbx_verbose("resize datafile/mapping: " + "present %" PRIuPTR " -> %" PRIuPTR ", " + "limit %" PRIuPTR " -> %" PRIuPTR, + env->me_dxb_mmap.current, size_bytes, env->me_dxb_mmap.limit, + limit_bytes); + + mdbx_assert(env, limit_bytes >= size_bytes); + mdbx_assert(env, bytes2pgno(env, size_bytes) >= size_pgno); + mdbx_assert(env, bytes2pgno(env, limit_bytes) >= limit_pgno); + const size_t prev_limit = env->me_dxb_mmap.limit; + const void *const prev_addr = env->me_map; + +#if defined(_WIN32) || defined(_WIN64) + /* Acquire guard in exclusive mode for: + * - to avoid collision between read and write txns around env->me_dbgeo; + * - to avoid attachment of new reading threads (see mdbx_rdt_lock); */ + mdbx_srwlock_AcquireExclusive(&env->me_remap_guard); + mdbx_handle_array_t *suspended = NULL; + mdbx_handle_array_t array_onstack; + int rc = MDBX_SUCCESS; + if (limit_bytes == env->me_dxb_mmap.limit && + size_bytes == env->me_dxb_mmap.current && + size_bytes == env->me_dxb_mmap.filesize) + goto bailout; + + /* 1) Windows allows only extending a read-write section, but not a + * corresponing mapped view. Therefore in other cases we must suspend + * the local threads for safe remap. + * 2) At least on Windows 10 1803 the entire mapped section is unavailable + * for short time during NtExtendSection() or VirtualAlloc() execution. + * 3) Under Wine runtime environment on Linux a section extending is not + * supported. Therefore thread suspending is always required. + * + * THEREFORE LOCAL THREADS SUSPENDING IS ALWAYS REQUIRED! */ + array_onstack.limit = ARRAY_LENGTH(array_onstack.handles); + array_onstack.count = 0; + suspended = &array_onstack; + rc = mdbx_suspend_threads_before_remap(env, &suspended); + if (rc != MDBX_SUCCESS) { + mdbx_error("failed suspend-for-remap: errcode %d", rc); + goto bailout; + } +#else + /* Acquire guard to avoid collision between read and write txns + * around env->me_dbgeo */ + int rc = mdbx_fastmutex_acquire(&env->me_remap_guard); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + if (limit_bytes == env->me_dxb_mmap.limit && + size_bytes == env->me_dxb_mmap.current) + goto bailout; +#endif /* Windows */ + + const size_t prev_size = env->me_dxb_mmap.current; + if (size_bytes < prev_size) { + mdbx_notice("resize-MADV_%s %u..%u", + (env->me_flags & MDBX_WRITEMAP) ? "REMOVE" : "DONTNEED", + size_pgno, bytes2pgno(env, prev_size)); + rc = MDBX_RESULT_TRUE; +#if defined(MADV_REMOVE) + if (env->me_flags & MDBX_WRITEMAP) + rc = + madvise(env->me_map + size_bytes, prev_size - size_bytes, MADV_REMOVE) + ? ignore_enosys(errno) + : MDBX_SUCCESS; +#endif /* MADV_REMOVE */ +#if defined(MADV_DONTNEED) + if (rc == MDBX_RESULT_TRUE) + rc = madvise(env->me_map + size_bytes, prev_size - size_bytes, + MADV_DONTNEED) + ? ignore_enosys(errno) + : MDBX_SUCCESS; +#elif defined(POSIX_MADV_DONTNEED) + if (rc == MDBX_RESULT_TRUE) + rc = ignore_enosys(posix_madvise(env->me_map + size_bytes, + prev_size - size_bytes, + POSIX_MADV_DONTNEED)); +#elif defined(POSIX_FADV_DONTNEED) + if (rc == MDBX_RESULT_TRUE) + rc = ignore_enosys(posix_fadvise(env->me_lazy_fd, size_bytes, + prev_size - size_bytes, + POSIX_FADV_DONTNEED)); +#endif /* MADV_DONTNEED */ + if (unlikely(MDBX_IS_ERROR(rc))) + goto bailout; + if (*env->me_discarded_tail > size_pgno) + *env->me_discarded_tail = size_pgno; + } + + rc = mdbx_mresize(env->me_flags, &env->me_dxb_mmap, size_bytes, limit_bytes); + if (rc == MDBX_SUCCESS && (env->me_flags & MDBX_NORDAHEAD) == 0) { + const int readahead = mdbx_is_readahead_reasonable(size_bytes, 0); + if (readahead == MDBX_RESULT_FALSE) + rc = mdbx_set_readahead( + env, 0, (size_bytes > prev_size) ? size_bytes : prev_size, false); + else if (readahead == MDBX_RESULT_TRUE) { + const size_t readahead_pivot = + (limit_bytes != prev_limit || env->me_dxb_mmap.address != prev_addr +#if defined(_WIN32) || defined(_WIN64) + || prev_size > size_bytes +#endif /* Windows */ + ) + ? 0 /* reassign readahead to the entire map + because it was remapped */ + : prev_size; + if (size_bytes > readahead_pivot) { + *env->me_discarded_tail = size_pgno; + rc = mdbx_set_readahead(env, readahead_pivot, + size_bytes - readahead_pivot, true); + } + } + } + +bailout: + if (rc == MDBX_SUCCESS) { +#if defined(_WIN32) || defined(_WIN64) + mdbx_assert(env, size_bytes == env->me_dxb_mmap.current); + mdbx_assert(env, size_bytes <= env->me_dxb_mmap.filesize); + mdbx_assert(env, limit_bytes == env->me_dxb_mmap.limit); +#endif /* Windows */ +#ifdef MDBX_USE_VALGRIND + if (prev_limit != env->me_dxb_mmap.limit || prev_addr != env->me_map) { + VALGRIND_DISCARD(env->me_valgrind_handle); + env->me_valgrind_handle = 0; + if (env->me_dxb_mmap.limit) + env->me_valgrind_handle = + VALGRIND_CREATE_BLOCK(env->me_map, env->me_dxb_mmap.limit, "mdbx"); + } +#endif /* MDBX_USE_VALGRIND */ + } else { + if (rc != MDBX_UNABLE_EXTEND_MAPSIZE) { + mdbx_error("failed resize datafile/mapping: " + "present %" PRIuPTR " -> %" PRIuPTR ", " + "limit %" PRIuPTR " -> %" PRIuPTR ", errcode %d", + env->me_dxb_mmap.current, size_bytes, env->me_dxb_mmap.limit, + limit_bytes, rc); + } else { + mdbx_notice("unable resize datafile/mapping: " + "present %" PRIuPTR " -> %" PRIuPTR ", " + "limit %" PRIuPTR " -> %" PRIuPTR ", errcode %d", + env->me_dxb_mmap.current, size_bytes, env->me_dxb_mmap.limit, + limit_bytes, rc); + } + if (!env->me_dxb_mmap.address) { + env->me_flags |= MDBX_FATAL_ERROR; + if (env->me_txn) + env->me_txn->mt_flags |= MDBX_TXN_ERROR; + rc = MDBX_PANIC; + } + } + +#if defined(_WIN32) || defined(_WIN64) + int err = MDBX_SUCCESS; + mdbx_srwlock_ReleaseExclusive(&env->me_remap_guard); + if (suspended) { + err = mdbx_resume_threads_after_remap(suspended); + if (suspended != &array_onstack) + mdbx_free(suspended); + } +#else + int err = mdbx_fastmutex_release(&env->me_remap_guard); +#endif /* Windows */ + if (err != MDBX_SUCCESS) { + mdbx_fatal("failed resume-after-remap: errcode %d", err); + return MDBX_PANIC; + } + return rc; +} + +static int mdbx_meta_unsteady(MDBX_env *env, const txnid_t last_steady, + MDBX_meta *const meta) { + const uint64_t wipe = MDBX_DATASIGN_NONE; + if (META_IS_STEADY(meta) && + mdbx_meta_txnid_stable(env, meta) <= last_steady) { + mdbx_notice("wipe txn #%" PRIaTXN ", meta %" PRIaPGNO, last_steady, + data_page(meta)->mp_pgno); + if (env->me_flags & MDBX_WRITEMAP) + meta->mm_datasync_sign = wipe; + else + return mdbx_pwrite(env->me_lazy_fd, &wipe, sizeof(meta->mm_datasync_sign), + (uint8_t *)&meta->mm_datasync_sign - env->me_map); + } + return MDBX_SUCCESS; +} + +__cold static int mdbx_wipe_steady(MDBX_env *env, const txnid_t last_steady) { + int err = mdbx_meta_unsteady(env, last_steady, METAPAGE(env, 0)); + if (unlikely(err != MDBX_SUCCESS)) + return err; + err = mdbx_meta_unsteady(env, last_steady, METAPAGE(env, 1)); + if (unlikely(err != MDBX_SUCCESS)) + return err; + err = mdbx_meta_unsteady(env, last_steady, METAPAGE(env, 2)); + if (unlikely(err != MDBX_SUCCESS)) + return err; + + if (env->me_flags & MDBX_WRITEMAP) { + mdbx_flush_incoherent_cpu_writeback(); + err = mdbx_msync(&env->me_dxb_mmap, 0, pgno_align2os_bytes(env, NUM_METAS), + false); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } else { +#if (defined(__linux__) || defined(__gnu_linux__)) && \ + (!defined(__ANDROID_API__) || __ANDROID_API__ >= 26) && \ + defined(_GNU_SOURCE) && !defined(MDBX_SAFE4QEMU) + if (sync_file_range(env->me_lazy_fd, 0, pgno2bytes(env, NUM_METAS), + SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_AFTER)) + err = errno; +#else + err = mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA); +#endif + if (unlikely(err != MDBX_SUCCESS)) + return err; + mdbx_flush_incoherent_mmap(env->me_map, pgno2bytes(env, NUM_METAS), + env->me_os_psize); + } + + if (likely(env->me_lck)) + /* force oldest refresh */ + env->me_lck->mti_readers_refresh_flag = true; + return MDBX_SUCCESS; +} + +/* Allocate page numbers and memory for writing. Maintain mt_last_reclaimed, + * mt_reclaimed_pglist and mt_next_pgno. Set MDBX_TXN_ERROR on failure. + * + * If there are free pages available from older transactions, they + * are re-used first. Otherwise allocate a new page at mt_next_pgno. + * Do not modify the GC, just merge GC records into mt_reclaimed_pglist + * and move mt_last_reclaimed to say which records were consumed. Only this + * function can create mt_reclaimed_pglist and move + * mt_last_reclaimed/mt_next_pgno. + * + * [in] mc cursor A cursor handle identifying the transaction and + * database for which we are allocating. + * [in] num the number of pages to allocate. + * [out] mp Address of the allocated page(s). Requests for multiple pages + * will always be satisfied by a single contiguous chunk of memory. + * + * Returns 0 on success, non-zero on failure.*/ + +#define MDBX_ALLOC_CACHE 1 +#define MDBX_ALLOC_GC 2 +#define MDBX_ALLOC_NEW 4 +#define MDBX_ALLOC_ALL (MDBX_ALLOC_CACHE | MDBX_ALLOC_GC | MDBX_ALLOC_NEW) + +__hot static int mdbx_page_alloc(MDBX_cursor *mc, const unsigned num, + MDBX_page **const mp, int flags) { + int rc; + MDBX_txn *txn = mc->mc_txn; + MDBX_env *env = txn->mt_env; + MDBX_page *np; + + if (likely(flags & MDBX_ALLOC_GC)) { + flags |= env->me_flags & (MDBX_COALESCE | MDBX_LIFORECLAIM); + if (unlikely(mc->mc_flags & C_RECLAIMING)) { + /* If mc is updating the GC, then the retired-list cannot play + * catch-up with itself by growing while trying to save it. */ + flags &= ~(MDBX_ALLOC_GC | MDBX_COALESCE | MDBX_LIFORECLAIM); + } else if (unlikely(txn->mt_dbs[FREE_DBI].md_entries == 0)) { + /* avoid (recursive) search inside empty tree and while tree is updating, + * https://github.com/erthink/libmdbx/issues/31 */ + flags &= ~MDBX_ALLOC_GC; + } + } + + if (likely(num == 1 && (flags & MDBX_ALLOC_CACHE) != 0)) { + /* If there are any loose pages, just use them */ + mdbx_assert(env, mp && num); + if (likely(txn->tw.loose_pages)) { + if (txn->tw.loose_refund_wl > txn->mt_next_pgno) { + mdbx_refund(txn); + if (unlikely(!txn->tw.loose_pages)) + goto skip_cache; + } + + np = txn->tw.loose_pages; + txn->tw.loose_pages = np->mp_next; + txn->tw.loose_count--; + mdbx_debug("db %d use loose page %" PRIaPGNO, DDBI(mc), np->mp_pgno); + mdbx_tassert(txn, np->mp_pgno < txn->mt_next_pgno); + mdbx_ensure(env, np->mp_pgno >= NUM_METAS); + VALGRIND_MAKE_MEM_UNDEFINED(page_data(np), page_space(txn->mt_env)); + ASAN_UNPOISON_MEMORY_REGION(page_data(np), page_space(txn->mt_env)); + np->mp_flags = P_DIRTY; + np->mp_txnid = INVALID_TXNID; + *mp = np; + return MDBX_SUCCESS; + } + } +skip_cache: + + mdbx_tassert( + txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); + pgno_t pgno, *re_list = txn->tw.reclaimed_pglist; + unsigned range_begin = 0, re_len = MDBX_PNL_SIZE(re_list); + txnid_t oldest = 0, last = 0; + const unsigned wanna_range = num - 1; + + while (true) { /* oom-kick retry loop */ + /* If our dirty list is already full, we can't do anything */ + if (unlikely(txn->tw.dirtyroom == 0)) { + rc = MDBX_TXN_FULL; + goto fail; + } + + MDBX_cursor_couple recur; + for (MDBX_cursor_op op = MDBX_FIRST;; + op = (flags & MDBX_LIFORECLAIM) ? MDBX_PREV : MDBX_NEXT) { + MDBX_val key, data; + + /* Seek a big enough contiguous page range. + * Prefer pages with lower pgno. */ + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + if (likely(flags & MDBX_ALLOC_CACHE) && re_len > wanna_range && + (!(flags & MDBX_COALESCE) || op == MDBX_FIRST)) { + mdbx_tassert(txn, MDBX_PNL_LAST(re_list) < txn->mt_next_pgno && + MDBX_PNL_FIRST(re_list) < txn->mt_next_pgno); + range_begin = MDBX_PNL_ASCENDING ? 1 : re_len; + pgno = MDBX_PNL_LEAST(re_list); + if (likely(wanna_range == 0)) + goto done; +#if MDBX_PNL_ASCENDING + mdbx_tassert(txn, pgno == re_list[1] && range_begin == 1); + while (true) { + unsigned range_end = range_begin + wanna_range; + if (re_list[range_end] - pgno == wanna_range) + goto done; + if (range_end == re_len) + break; + pgno = re_list[++range_begin]; + } +#else + mdbx_tassert(txn, pgno == re_list[re_len] && range_begin == re_len); + while (true) { + if (re_list[range_begin - wanna_range] - pgno == wanna_range) + goto done; + if (range_begin == wanna_range) + break; + pgno = re_list[--range_begin]; + } +#endif /* MDBX_PNL sort-order */ + } + + if (op == MDBX_FIRST) { /* 1st iteration, setup cursor, etc */ + if (unlikely(!(flags & MDBX_ALLOC_GC))) + break /* reclaiming is prohibited for now */; + + /* Prepare to fetch more and coalesce */ + oldest = (flags & MDBX_LIFORECLAIM) ? mdbx_find_oldest(txn) + : *env->me_oldest; + rc = mdbx_cursor_init(&recur.outer, txn, FREE_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + if (flags & MDBX_LIFORECLAIM) { + /* Begin from oldest reader if any */ + if (oldest > MIN_TXNID) { + last = oldest - 1; + op = MDBX_SET_RANGE; + } + } else if (txn->tw.last_reclaimed) { + /* Continue lookup from txn->tw.last_reclaimed to oldest reader */ + last = txn->tw.last_reclaimed; + op = MDBX_SET_RANGE; + } + + key.iov_base = &last; + key.iov_len = sizeof(last); + } + + if (!(flags & MDBX_LIFORECLAIM)) { + /* Do not try fetch more if the record will be too recent */ + if (op != MDBX_FIRST && ++last >= oldest) { + oldest = mdbx_find_oldest(txn); + if (oldest <= last) + break; + } + } + + rc = mdbx_cursor_get(&recur.outer, &key, NULL, op); + if (rc == MDBX_NOTFOUND && (flags & MDBX_LIFORECLAIM)) { + if (op == MDBX_SET_RANGE) + continue; + txnid_t snap = mdbx_find_oldest(txn); + if (oldest < snap) { + oldest = snap; + last = oldest - 1; + key.iov_base = &last; + key.iov_len = sizeof(last); + op = MDBX_SET_RANGE; + rc = mdbx_cursor_get(&recur.outer, &key, NULL, op); + } + } + if (unlikely(rc)) { + if (rc == MDBX_NOTFOUND) + break; + goto fail; + } + + if (unlikely(key.iov_len != sizeof(txnid_t))) { + rc = MDBX_CORRUPTED; + goto fail; + } + last = unaligned_peek_u64(4, key.iov_base); + if (unlikely(last < 1 || last >= SAFE64_INVALID_THRESHOLD)) { + rc = MDBX_CORRUPTED; + goto fail; + } + if (oldest <= last) { + oldest = mdbx_find_oldest(txn); + if (oldest <= last) { + if (flags & MDBX_LIFORECLAIM) + continue; + break; + } + } + + if (flags & MDBX_LIFORECLAIM) { + /* skip IDs of records that already reclaimed */ + if (txn->tw.lifo_reclaimed) { + size_t i; + for (i = (size_t)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed); i > 0; --i) + if (txn->tw.lifo_reclaimed[i] == last) + break; + if (i) + continue; + } + } + + /* Reading next GC record */ + np = recur.outer.mc_pg[recur.outer.mc_top]; + if (unlikely((rc = mdbx_node_read( + &recur.outer, + page_node(np, recur.outer.mc_ki[recur.outer.mc_top]), + &data)) != MDBX_SUCCESS)) + goto fail; + + if ((flags & MDBX_LIFORECLAIM) && !txn->tw.lifo_reclaimed) { + txn->tw.lifo_reclaimed = mdbx_txl_alloc(); + if (unlikely(!txn->tw.lifo_reclaimed)) { + rc = MDBX_ENOMEM; + goto fail; + } + } + + /* Append PNL from GC record to me_reclaimed_pglist */ + mdbx_cassert(mc, (mc->mc_flags & C_GCFREEZE) == 0); + pgno_t *gc_pnl = (pgno_t *)data.iov_base; + mdbx_tassert(txn, data.iov_len >= MDBX_PNL_SIZEOF(gc_pnl)); + if (unlikely(data.iov_len < MDBX_PNL_SIZEOF(gc_pnl) || + !mdbx_pnl_check(gc_pnl, txn->mt_next_pgno))) { + rc = MDBX_CORRUPTED; + goto fail; + } + const unsigned gc_len = MDBX_PNL_SIZE(gc_pnl); + rc = mdbx_pnl_need(&txn->tw.reclaimed_pglist, gc_len); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + re_list = txn->tw.reclaimed_pglist; + + /* Remember ID of GC record */ + if (flags & MDBX_LIFORECLAIM) { + rc = mdbx_txl_append(&txn->tw.lifo_reclaimed, last); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + txn->tw.last_reclaimed = last; + + if (mdbx_log_enabled(MDBX_LOG_EXTRA)) { + mdbx_debug_extra("PNL read txn %" PRIaTXN " root %" PRIaPGNO + " num %u, PNL", + last, txn->mt_dbs[FREE_DBI].md_root, gc_len); + unsigned i; + for (i = gc_len; i; i--) + mdbx_debug_extra_print(" %" PRIaPGNO, gc_pnl[i]); + mdbx_debug_extra_print("%s", "\n"); + } + + /* Merge in descending sorted order */ + const unsigned prev_re_len = MDBX_PNL_SIZE(re_list); + mdbx_pnl_xmerge(re_list, gc_pnl); + /* re-check to avoid duplicates */ + if (unlikely(!mdbx_pnl_check(re_list, txn->mt_next_pgno))) { + rc = MDBX_CORRUPTED; + goto fail; + } + + re_len = MDBX_PNL_SIZE(re_list); + mdbx_tassert(txn, re_len == 0 || re_list[re_len] < txn->mt_next_pgno); + if (re_len && unlikely(MDBX_PNL_MOST(re_list) == txn->mt_next_pgno - 1)) { + /* Refund suitable pages into "unallocated" space */ + mdbx_refund(txn); + re_list = txn->tw.reclaimed_pglist; + re_len = MDBX_PNL_SIZE(re_list); + } + + if (unlikely((flags & MDBX_ALLOC_CACHE) == 0)) { + /* Done for a kick-reclaim mode, actually no page needed */ + return MDBX_SUCCESS; + } + + /* Don't try to coalesce too much. */ + if (unlikely(re_len > MDBX_DPL_TXNFULL / 4)) + break; + if (re_len /* current size */ >= env->me_maxgc_ov1page || + (re_len > prev_re_len && re_len - prev_re_len /* delta from prev */ >= + env->me_maxgc_ov1page / 2)) + flags &= ~MDBX_COALESCE; + } + + if ((flags & (MDBX_COALESCE | MDBX_ALLOC_CACHE)) == MDBX_ALLOC_CACHE && + re_len > wanna_range) { + range_begin = MDBX_PNL_ASCENDING ? 1 : re_len; + pgno = MDBX_PNL_LEAST(re_list); + if (likely(wanna_range == 0)) + goto done; +#if MDBX_PNL_ASCENDING + mdbx_tassert(txn, pgno == re_list[1] && range_begin == 1); + while (true) { + unsigned range_end = range_begin + wanna_range; + if (re_list[range_end] - pgno == wanna_range) + goto done; + if (range_end == re_len) + break; + pgno = re_list[++range_begin]; + } +#else + mdbx_tassert(txn, pgno == re_list[re_len] && range_begin == re_len); + while (true) { + if (re_list[range_begin - wanna_range] - pgno == wanna_range) + goto done; + if (range_begin == wanna_range) + break; + pgno = re_list[--range_begin]; + } +#endif /* MDBX_PNL sort-order */ + } + + /* There is no suitable pages in the GC and to be able to allocate + * we should CHOICE one of: + * - make a new steady checkpoint if reclaiming was stopped by + * the last steady-sync, or wipe it in the MDBX_UTTERLY_NOSYNC mode; + * - kick lagging reader(s) if reclaiming was stopped by ones of it. + * - extend the database file. */ + + /* Will use new pages from the map if nothing is suitable in the GC. */ + range_begin = 0; + pgno = txn->mt_next_pgno; + const pgno_t next = pgno_add(pgno, num); + + if (flags & MDBX_ALLOC_GC) { + const MDBX_meta *const head = mdbx_meta_head(env); + MDBX_meta *const steady = mdbx_meta_steady(env); + /* does reclaiming stopped at the last steady point? */ + if (head != steady && META_IS_STEADY(steady) && + oldest == mdbx_meta_txnid_stable(env, steady)) { + mdbx_debug("gc-kick-steady: head %" PRIaTXN "-%s, tail %" PRIaTXN + "-%s, oldest %" PRIaTXN, + mdbx_meta_txnid_stable(env, head), mdbx_durable_str(head), + mdbx_meta_txnid_stable(env, steady), + mdbx_durable_str(steady), oldest); + rc = MDBX_RESULT_TRUE; + const pgno_t autosync_threshold = *env->me_autosync_threshold; + const uint64_t autosync_period = *env->me_autosync_period; + /* wipe the last steady-point if one of: + * - UTTERLY_NOSYNC mode AND auto-sync threshold is NOT specified + * - UTTERLY_NOSYNC mode AND free space at steady-point is exhausted + * otherwise, make a new steady-point if one of: + * - auto-sync threshold is specified and reached; + * - upper limit of database size is reached; + * - database is full (with the current file size) + * AND auto-sync threshold it NOT specified */ + if (F_ISSET(env->me_flags, MDBX_UTTERLY_NOSYNC) && + ((autosync_threshold | autosync_period) == 0 || + next >= steady->mm_geo.now)) { + /* wipe steady checkpoint in MDBX_UTTERLY_NOSYNC mode + * without any auto-sync treshold(s). */ + rc = mdbx_wipe_steady(env, oldest); + mdbx_debug("gc-wipe-steady, rc %d", rc); + mdbx_assert(env, steady != mdbx_meta_steady(env)); + } else if ((flags & MDBX_ALLOC_NEW) == 0 || + (autosync_threshold && + *env->me_unsynced_pages >= autosync_threshold) || + (autosync_period && + mdbx_osal_monotime() - *env->me_sync_timestamp >= + autosync_period) || + next >= txn->mt_geo.upper || + (next >= txn->mt_end_pgno && + (autosync_threshold | autosync_period) == 0)) { + /* make steady checkpoint. */ + MDBX_meta meta = *head; + rc = mdbx_sync_locked(env, env->me_flags & MDBX_WRITEMAP, &meta); + mdbx_debug("gc-make-steady, rc %d", rc); + mdbx_assert(env, steady != mdbx_meta_steady(env)); + } + if (rc == MDBX_SUCCESS) { + if (mdbx_find_oldest(txn) > oldest) + continue; + /* it is reasonable check/kick lagging reader(s) here, + * since we made a new steady point or wipe the last. */ + if (oldest < txn->mt_txnid - MDBX_TXNID_STEP && + mdbx_oomkick(env, oldest) > oldest) + continue; + } else if (unlikely(rc != MDBX_RESULT_TRUE)) + goto fail; + } + } + + /* don't kick lagging reader(s) if is enough unallocated space + * at the end of database file. */ + if ((flags & MDBX_ALLOC_NEW) && next <= txn->mt_end_pgno) + goto done; + if ((flags & MDBX_ALLOC_GC) && oldest < txn->mt_txnid - MDBX_TXNID_STEP && + mdbx_oomkick(env, oldest) > oldest) + continue; + + rc = MDBX_NOTFOUND; + if (flags & MDBX_ALLOC_NEW) { + rc = MDBX_MAP_FULL; + if (next <= txn->mt_geo.upper && txn->mt_geo.grow) { + mdbx_assert(env, next > txn->mt_end_pgno); + pgno_t aligned = pgno_align2os_pgno( + env, pgno_add(next, txn->mt_geo.grow - next % txn->mt_geo.grow)); + + if (aligned > txn->mt_geo.upper) + aligned = txn->mt_geo.upper; + mdbx_assert(env, aligned > txn->mt_end_pgno); + + mdbx_verbose("try growth datafile to %" PRIaPGNO " pages (+%" PRIaPGNO + ")", + aligned, aligned - txn->mt_end_pgno); + rc = mdbx_mapresize(env, txn->mt_next_pgno, aligned, txn->mt_geo.upper); + if (rc == MDBX_SUCCESS) { + env->me_txn->mt_end_pgno = aligned; + goto done; + } + + mdbx_error("unable growth datafile to %" PRIaPGNO " pages (+%" PRIaPGNO + "), errcode %d", + aligned, aligned - txn->mt_end_pgno, rc); + } else { + mdbx_debug("gc-alloc: next %u > upper %u", next, txn->mt_geo.upper); + } + } + + fail: + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + if (likely(mp)) { + *mp = nullptr; + txn->mt_flags |= MDBX_TXN_ERROR; + } + mdbx_assert(env, rc != MDBX_SUCCESS); + return rc; + } + +done: + if (unlikely(mp == nullptr)) + return MDBX_SUCCESS; + mdbx_ensure(env, pgno >= NUM_METAS); + if (env->me_flags & MDBX_WRITEMAP) { + np = pgno2page(env, pgno); + /* LY: reset no-access flag from mdbx_loose_page() */ + VALGRIND_MAKE_MEM_UNDEFINED(np, pgno2bytes(env, num)); + ASAN_UNPOISON_MEMORY_REGION(np, pgno2bytes(env, num)); + } else { + if (unlikely(!(np = mdbx_page_malloc(txn, num)))) { + rc = MDBX_ENOMEM; + goto fail; + } + } + + if (range_begin) { + mdbx_cassert(mc, (mc->mc_flags & C_GCFREEZE) == 0); + mdbx_tassert(txn, pgno < txn->mt_next_pgno); + mdbx_tassert(txn, pgno == re_list[range_begin]); + /* Cutoff allocated pages from me_reclaimed_pglist */ +#if MDBX_PNL_ASCENDING + for (unsigned i = range_begin + num; i <= re_len;) + re_list[range_begin++] = re_list[i++]; + MDBX_PNL_SIZE(re_list) = re_len = range_begin - 1; +#else + MDBX_PNL_SIZE(re_list) = re_len -= num; + for (unsigned i = range_begin - num; i < re_len;) + re_list[++i] = re_list[++range_begin]; +#endif + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + } else { + txn->mt_next_pgno = pgno + num; + mdbx_assert(env, txn->mt_next_pgno <= txn->mt_end_pgno); + } + + if (unlikely(env->me_flags & MDBX_PAGEPERTURB)) + memset(np, -1, pgno2bytes(env, num)); + VALGRIND_MAKE_MEM_UNDEFINED(np, pgno2bytes(env, num)); + + np->mp_pgno = pgno; + np->mp_leaf2_ksize = 0; + np->mp_flags = 0; + np->mp_pages = num; + rc = mdbx_page_dirty(txn, np); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + *mp = np; + + mdbx_tassert( + txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); + return MDBX_SUCCESS; +} + +/* Copy the used portions of a non-overflow page. */ +__hot static void mdbx_page_copy(MDBX_page *dst, MDBX_page *src, size_t psize) { + STATIC_ASSERT(UINT16_MAX > MAX_PAGESIZE - PAGEHDRSZ); + STATIC_ASSERT(MIN_PAGESIZE > PAGEHDRSZ + NODESIZE * 4); + if (!IS_LEAF2(src)) { + size_t upper = src->mp_upper, lower = src->mp_lower, unused = upper - lower; + + /* If page isn't full, just copy the used portion. Adjust + * alignment so memcpy may copy words instead of bytes. */ + if (unused >= MDBX_CACHELINE_SIZE * 2) { + lower = ceil_powerof2(lower + PAGEHDRSZ, sizeof(void *)); + upper = floor_powerof2(upper + PAGEHDRSZ, sizeof(void *)); + memcpy(dst, src, lower); + dst = (void *)((char *)dst + upper); + src = (void *)((char *)src + upper); + psize -= upper; + } + } + memcpy(dst, src, psize); +} + +/* Pull a page off the txn's spill list, if present. + * + * If a page being referenced was spilled to disk in this txn, bring + * it back and make it dirty/writable again. + * + * [in] txn the transaction handle. + * [in] mp the page being referenced. It must not be dirty. + * [out] ret the writable page, if any. + * ret is unchanged if mp wasn't spilled. */ +static int __must_check_result mdbx_page_unspill(MDBX_txn *txn, MDBX_page *mp, + MDBX_page **ret) { + MDBX_env *env = txn->mt_env; + pgno_t pgno = mp->mp_pgno, pn = pgno << 1; + + for (const MDBX_txn *tx2 = txn; tx2; tx2 = tx2->mt_parent) { + if (!tx2->tw.spill_pages) + continue; + unsigned i = mdbx_pnl_exist(tx2->tw.spill_pages, pn); + if (!i) + continue; + if (txn->tw.dirtyroom == 0) + return MDBX_TXN_FULL; + unsigned num = IS_OVERFLOW(mp) ? mp->mp_pages : 1; + MDBX_page *np = mp; + if ((env->me_flags & MDBX_WRITEMAP) == 0) { + np = mdbx_page_malloc(txn, num); + if (unlikely(!np)) + return MDBX_ENOMEM; + if (unlikely(num > 1)) + memcpy(np, mp, pgno2bytes(env, num)); + else + mdbx_page_copy(np, mp, env->me_psize); + } + mdbx_debug("unspill page %" PRIaPGNO, mp->mp_pgno); + if (tx2 == txn) { + /* If in current txn, this page is no longer spilled. + * If it happens to be the last page, truncate the spill list. + * Otherwise mark it as deleted by setting the LSB. */ + txn->tw.spill_pages[i] |= 1; + if (i == MDBX_PNL_SIZE(txn->tw.spill_pages)) + MDBX_PNL_SIZE(txn->tw.spill_pages) -= 1; + } /* otherwise, if belonging to a parent txn, the + * page remains spilled until child commits */ + + int rc = mdbx_page_dirty(txn, np); + if (likely(rc == MDBX_SUCCESS)) + *ret = np; + return rc; + } + return MDBX_SUCCESS; +} + +/* Touch a page: make it dirty and re-insert into tree with updated pgno. + * Set MDBX_TXN_ERROR on failure. + * + * [in] mc cursor pointing to the page to be touched + * + * Returns 0 on success, non-zero on failure. */ +__hot static int mdbx_page_touch(MDBX_cursor *mc) { + MDBX_page *mp = mc->mc_pg[mc->mc_top], *np; + MDBX_txn *txn = mc->mc_txn; + MDBX_cursor *m2, *m3; + pgno_t pgno; + int rc; + + mdbx_cassert(mc, !IS_OVERFLOW(mp)); + if (!F_ISSET(mp->mp_flags, P_DIRTY)) { + if (txn->mt_flags & MDBX_TXN_SPILLS) { + np = NULL; + rc = mdbx_page_unspill(txn, mp, &np); + if (unlikely(rc)) + goto fail; + if (likely(np)) + goto done; + } + + if (unlikely((rc = mdbx_pnl_need(&txn->tw.retired_pages, 1)) || + (rc = mdbx_page_alloc(mc, 1, &np, MDBX_ALLOC_ALL)))) + goto fail; + pgno = np->mp_pgno; + mdbx_debug("touched db %d page %" PRIaPGNO " -> %" PRIaPGNO, DDBI(mc), + mp->mp_pgno, pgno); + mdbx_cassert(mc, mp->mp_pgno != pgno); + mdbx_pnl_xappend(txn->tw.retired_pages, mp->mp_pgno); + mdbx_tassert(txn, mdbx_dpl_find(txn->tw.dirtylist, mp->mp_pgno) == nullptr); + /* Update the parent page, if any, to point to the new page */ + if (mc->mc_top) { + MDBX_page *parent = mc->mc_pg[mc->mc_top - 1]; + MDBX_node *node = page_node(parent, mc->mc_ki[mc->mc_top - 1]); + node_set_pgno(node, pgno); + } else { + mc->mc_db->md_root = pgno; + } + } else if (txn->mt_parent && !IS_SUBP(mp)) { + mdbx_tassert(txn, (txn->mt_env->me_flags & MDBX_WRITEMAP) == 0); + pgno = mp->mp_pgno; + /* If txn has a parent, make sure the page is in our dirty list. */ + const MDBX_page *const dp = mdbx_dpl_find(txn->tw.dirtylist, pgno); + if (dp) { + if (unlikely(mp != dp)) { /* bad cursor? */ + mdbx_error("wrong page 0x%p #%" PRIaPGNO + " in the dirtylist, expecting %p", + __Wpedantic_format_voidptr(dp), pgno, + __Wpedantic_format_voidptr(mp)); + mc->mc_flags &= ~(C_INITIALIZED | C_EOF); + rc = MDBX_PROBLEM; + goto fail; + } + return MDBX_SUCCESS; + } + + mdbx_debug("clone db %d page %" PRIaPGNO, DDBI(mc), mp->mp_pgno); + mdbx_cassert(mc, txn->tw.dirtylist->length <= MDBX_DPL_TXNFULL); + /* No - copy it */ + np = mdbx_page_malloc(txn, 1); + if (unlikely(!np)) { + rc = MDBX_ENOMEM; + goto fail; + } + rc = mdbx_dpl_append(txn->tw.dirtylist, pgno, np); + if (unlikely(rc)) { + mdbx_dpage_free(txn->mt_env, np, 1); + goto fail; + } + } else { + return MDBX_SUCCESS; + } + + mdbx_page_copy(np, mp, txn->mt_env->me_psize); + np->mp_pgno = pgno; + np->mp_txnid = INVALID_TXNID; + np->mp_flags |= P_DIRTY; + +done: + /* Adjust cursors pointing to mp */ + mc->mc_pg[mc->mc_top] = np; + m2 = txn->mt_cursors[mc->mc_dbi]; + if (mc->mc_flags & C_SUB) { + for (; m2; m2 = m2->mc_next) { + m3 = &m2->mc_xcursor->mx_cursor; + if (m3->mc_snum < mc->mc_snum) + continue; + if (m3->mc_pg[mc->mc_top] == mp) + m3->mc_pg[mc->mc_top] = np; + } + } else { + for (; m2; m2 = m2->mc_next) { + if (m2->mc_snum < mc->mc_snum) + continue; + if (m2 == mc) + continue; + if (m2->mc_pg[mc->mc_top] == mp) { + m2->mc_pg[mc->mc_top] = np; + if (XCURSOR_INITED(m2) && IS_LEAF(np)) + XCURSOR_REFRESH(m2, np, m2->mc_ki[mc->mc_top]); + } + } + } + return MDBX_SUCCESS; + +fail: + txn->mt_flags |= MDBX_TXN_ERROR; + return rc; +} + +__cold static int mdbx_env_sync_internal(MDBX_env *env, int force, + int nonblock) { + unsigned flags = env->me_flags & ~MDBX_NOMETASYNC; + if (unlikely(flags & (MDBX_RDONLY | MDBX_FATAL_ERROR))) + return MDBX_EACCESS; + + if (unlikely(!env->me_map)) + return MDBX_EPERM; + + int rc = MDBX_RESULT_TRUE /* means "nothing to sync" */; + bool need_unlock = false; + if (nonblock && *env->me_unsynced_pages == 0) + goto fastpath; + + const bool outside_txn = (env->me_txn0->mt_owner != mdbx_thread_self()); + if (outside_txn) { + int err = mdbx_txn_lock(env, nonblock); + if (unlikely(err != MDBX_SUCCESS)) + return err; + need_unlock = true; + } + + const MDBX_meta *head = mdbx_meta_head(env); + pgno_t unsynced_pages = *env->me_unsynced_pages; + if (!META_IS_STEADY(head) || unsynced_pages) { + const pgno_t autosync_threshold = *env->me_autosync_threshold; + const uint64_t autosync_period = *env->me_autosync_period; + if (force || (autosync_threshold && unsynced_pages >= autosync_threshold) || + (autosync_period && + mdbx_osal_monotime() - *env->me_sync_timestamp >= autosync_period)) + flags &= MDBX_WRITEMAP /* clear flags for full steady sync */; + + if (outside_txn) { + if (unsynced_pages > /* FIXME: define threshold */ 16 && + (flags & (MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) == 0) { + mdbx_assert(env, ((flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); + const size_t usedbytes = pgno_align2os_bytes(env, head->mm_geo.next); + + mdbx_txn_unlock(env); + + /* LY: pre-sync without holding lock to reduce latency for writer(s) */ + int err = (flags & MDBX_WRITEMAP) + ? mdbx_msync(&env->me_dxb_mmap, 0, usedbytes, false) + : mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA); + if (unlikely(err != MDBX_SUCCESS)) + return err; + + err = mdbx_txn_lock(env, nonblock); + if (unlikely(err != MDBX_SUCCESS)) + return err; + + /* LY: head and unsynced_pages may be changed. */ + head = mdbx_meta_head(env); + unsynced_pages = *env->me_unsynced_pages; + } + env->me_txn0->mt_txnid = meta_txnid(env, head, false); + mdbx_find_oldest(env->me_txn0); + rc = MDBX_RESULT_FALSE /* means "some data was synced" */; + } + + if (!META_IS_STEADY(head) || + ((flags & (MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) == 0 && unsynced_pages)) { + mdbx_debug("meta-head %" PRIaPGNO ", %s, sync_pending %" PRIaPGNO, + data_page(head)->mp_pgno, mdbx_durable_str(head), + unsynced_pages); + MDBX_meta meta = *head; + int err = mdbx_sync_locked(env, flags | MDBX_SHRINK_ALLOWED, &meta); + if (unlikely(err != MDBX_SUCCESS)) { + if (need_unlock) + mdbx_txn_unlock(env); + return err; + } + rc = MDBX_RESULT_FALSE /* means "some data was synced" */; + } + } + +fastpath: + /* LY: sync meta-pages if MDBX_NOMETASYNC enabled + * and someone was not synced above. */ + if (rc == MDBX_RESULT_TRUE && (env->me_flags & MDBX_NOMETASYNC) != 0) { + const txnid_t head_txnid = mdbx_recent_committed_txnid(env); + if (*env->me_meta_sync_txnid != (uint32_t)head_txnid) { + rc = + (flags & MDBX_WRITEMAP) + ? mdbx_msync(&env->me_dxb_mmap, 0, + pgno_align2os_bytes(env, NUM_METAS), false) + : mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); + if (likely(rc == MDBX_SUCCESS)) + *env->me_meta_sync_txnid = (uint32_t)head_txnid; + } + } + if (need_unlock) + mdbx_txn_unlock(env); + return rc; +} + +__cold int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) { + env->me_flags |= MDBX_FATAL_ERROR; + return MDBX_PANIC; + } +#endif /* MDBX_TXN_CHECKPID */ + + return mdbx_env_sync_internal(env, force, nonblock); +} + +__cold int mdbx_env_sync(MDBX_env *env) { + return mdbx_env_sync_ex(env, true, false); +} + +__cold int mdbx_env_sync_poll(MDBX_env *env) { + return mdbx_env_sync_ex(env, false, true); +} + +/* Back up parent txn's cursors, then grab the originals for tracking */ +static int mdbx_cursor_shadow(MDBX_txn *src, MDBX_txn *dst) { + MDBX_cursor *mc, *bk; + MDBX_xcursor *mx; + + for (int i = src->mt_numdbs; --i >= 0;) { + dst->mt_cursors[i] = NULL; + if ((mc = src->mt_cursors[i]) != NULL) { + size_t size = sizeof(MDBX_cursor); + if (mc->mc_xcursor) + size += sizeof(MDBX_xcursor); + for (; mc; mc = bk->mc_next) { + bk = mdbx_malloc(size); + if (unlikely(!bk)) + return MDBX_ENOMEM; + *bk = *mc; + mc->mc_backup = bk; + mc->mc_db = &dst->mt_dbs[i]; + /* Kill pointers into src to reduce abuse: The + * user may not use mc until dst ends. But we need a valid + * txn pointer here for cursor fixups to keep working. */ + mc->mc_txn = dst; + mc->mc_dbflag = &dst->mt_dbflags[i]; + if ((mx = mc->mc_xcursor) != NULL) { + *(MDBX_xcursor *)(bk + 1) = *mx; + mx->mx_cursor.mc_txn = dst; + } + mc->mc_next = dst->mt_cursors[i]; + dst->mt_cursors[i] = mc; + } + } + } + return MDBX_SUCCESS; +} + +/* Close this write txn's cursors, give parent txn's cursors back to parent. + * + * [in] txn the transaction handle. + * [in] merge true to keep changes to parent cursors, false to revert. + * + * Returns 0 on success, non-zero on failure. */ +static void mdbx_cursors_eot(MDBX_txn *txn, unsigned merge) { + MDBX_cursor **cursors = txn->mt_cursors, *mc, *next, *bk; + MDBX_xcursor *mx; + int i; + + for (i = txn->mt_numdbs; --i >= 0;) { + for (mc = cursors[i]; mc; mc = next) { + unsigned stage = mc->mc_signature; + mdbx_ensure(txn->mt_env, + stage == MDBX_MC_SIGNATURE || stage == MDBX_MC_WAIT4EOT); + next = mc->mc_next; + mdbx_tassert(txn, !next || next->mc_signature == MDBX_MC_SIGNATURE || + next->mc_signature == MDBX_MC_WAIT4EOT); + if ((bk = mc->mc_backup) != NULL) { + if (merge) { + /* Commit changes to parent txn */ + mc->mc_next = bk->mc_next; + mc->mc_backup = bk->mc_backup; + mc->mc_txn = bk->mc_txn; + mc->mc_db = bk->mc_db; + mc->mc_dbflag = bk->mc_dbflag; + if ((mx = mc->mc_xcursor) != NULL) + mx->mx_cursor.mc_txn = bk->mc_txn; + } else { + /* Abort nested txn */ + *mc = *bk; + if ((mx = mc->mc_xcursor) != NULL) + *mx = *(MDBX_xcursor *)(bk + 1); + } + bk->mc_signature = 0; + mdbx_free(bk); + } + if (stage == MDBX_MC_WAIT4EOT) { + mc->mc_signature = 0; + mdbx_free(mc); + } else { + mc->mc_signature = MDBX_MC_READY4CLOSE; + mc->mc_flags = 0 /* reset C_UNTRACK */; + } + } + cursors[i] = NULL; + } +} + +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) +/* Find largest mvcc-snapshot still referenced by this process. */ +static pgno_t mdbx_find_largest_this(MDBX_env *env, pgno_t largest) { + MDBX_lockinfo *const lck = env->me_lck; + if (likely(lck != NULL /* exclusive mode */)) { + const unsigned snap_nreaders = lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; ++i) { + retry: + if (lck->mti_readers[i].mr_pid == env->me_pid) { + /* mdbx_jitter4testing(true); */ + const pgno_t snap_pages = lck->mti_readers[i].mr_snapshot_pages_used; + const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); + mdbx_memory_barrier(); + if (unlikely(snap_pages != lck->mti_readers[i].mr_snapshot_pages_used || + snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) + goto retry; + if (largest < snap_pages && + lck->mti_oldest_reader <= /* ignore pending updates */ snap_txnid && + snap_txnid < SAFE64_INVALID_THRESHOLD) + largest = snap_pages; + } + } + } + return largest; +} + +static void mdbx_txn_valgrind(MDBX_env *env, MDBX_txn *txn) { +#if !defined(__SANITIZE_ADDRESS__) + if (!RUNNING_ON_VALGRIND) + return; +#endif + + if (txn) { /* transaction start */ + if (env->me_poison_edge < txn->mt_next_pgno) + env->me_poison_edge = txn->mt_next_pgno; + VALGRIND_MAKE_MEM_DEFINED(env->me_map, pgno2bytes(env, txn->mt_next_pgno)); + ASAN_UNPOISON_MEMORY_REGION(env->me_map, + pgno2bytes(env, txn->mt_next_pgno)); + /* don't touch more, it should be already poisoned */ + } else { /* transaction end */ + bool should_unlock = false; + pgno_t last = MAX_PAGENO; + if (env->me_txn0 && env->me_txn0->mt_owner == mdbx_thread_self()) { + /* inside write-txn */ + MDBX_meta *head = mdbx_meta_head(env); + last = head->mm_geo.next; + } else if (env->me_flags & MDBX_RDONLY) { + /* read-only mode, no write-txn, no wlock mutex */ + last = NUM_METAS; + } else if (mdbx_txn_lock(env, true) == MDBX_SUCCESS) { + /* no write-txn */ + last = NUM_METAS; + should_unlock = true; + } else { + /* write txn is running, therefore shouldn't poison any memory range */ + return; + } + + last = mdbx_find_largest_this(env, last); + const pgno_t edge = env->me_poison_edge; + if (edge > last) { + mdbx_assert(env, last >= NUM_METAS); + env->me_poison_edge = last; + VALGRIND_MAKE_MEM_NOACCESS(env->me_map + pgno2bytes(env, last), + pgno2bytes(env, edge - last)); + ASAN_POISON_MEMORY_REGION(env->me_map + pgno2bytes(env, last), + pgno2bytes(env, edge - last)); + } + if (should_unlock) + mdbx_txn_unlock(env); + } +} +#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ + +/* Common code for mdbx_txn_begin() and mdbx_txn_renew(). */ +static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) { + MDBX_env *env = txn->mt_env; + int rc; + +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) { + env->me_flags |= MDBX_FATAL_ERROR; + return MDBX_PANIC; + } +#endif /* MDBX_TXN_CHECKPID */ + + STATIC_ASSERT(sizeof(MDBX_reader) == 32); +#if MDBX_LOCKING > 0 + STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_wlock) % MDBX_CACHELINE_SIZE == 0); + STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_rlock) % MDBX_CACHELINE_SIZE == 0); +#else + STATIC_ASSERT( + offsetof(MDBX_lockinfo, mti_oldest_reader) % MDBX_CACHELINE_SIZE == 0); + STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_numreaders) % MDBX_CACHELINE_SIZE == + 0); +#endif /* MDBX_LOCKING */ + STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_readers) % MDBX_CACHELINE_SIZE == + 0); + + mdbx_assert(env, (flags & ~(MDBX_TXN_BEGIN_FLAGS | MDBX_TXN_SPILLS | + MDBX_WRITEMAP)) == 0); + const uintptr_t tid = mdbx_thread_self(); + if (flags & MDBX_RDONLY) { + txn->mt_flags = + MDBX_RDONLY | (env->me_flags & (MDBX_NOTLS | MDBX_WRITEMAP)); + MDBX_reader *r = txn->to.reader; + STATIC_ASSERT(sizeof(uintptr_t) == sizeof(r->mr_tid)); + if (likely(env->me_flags & MDBX_ENV_TXKEY)) { + mdbx_assert(env, !(env->me_flags & MDBX_NOTLS)); + r = thread_rthc_get(env->me_txkey); + if (likely(r)) { + mdbx_assert(env, r->mr_pid == env->me_pid); + mdbx_assert(env, r->mr_tid == mdbx_thread_self()); + } + } else { + mdbx_assert(env, !env->me_lck || (env->me_flags & MDBX_NOTLS)); + } + + if (likely(r)) { + if (unlikely(r->mr_pid != env->me_pid || + r->mr_txnid.inconsistent < SAFE64_INVALID_THRESHOLD)) + return MDBX_BAD_RSLOT; + } else if (env->me_lck) { + unsigned slot, nreaders; + mdbx_assert(env, env->me_lck->mti_magic_and_version == MDBX_LOCK_MAGIC); + mdbx_assert(env, env->me_lck->mti_os_and_format == MDBX_LOCK_FORMAT); + + rc = mdbx_rdt_lock(env); + if (unlikely(MDBX_IS_ERROR(rc))) + return rc; + if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { + mdbx_rdt_unlock(env); + return MDBX_PANIC; + } +#if defined(_WIN32) || defined(_WIN64) + if (unlikely(!env->me_map)) { + mdbx_rdt_unlock(env); + return MDBX_EPERM; + } +#endif /* Windows */ + rc = MDBX_SUCCESS; + + if (unlikely(env->me_live_reader != env->me_pid)) { + rc = mdbx_rpid_set(env); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_rdt_unlock(env); + return rc; + } + env->me_live_reader = env->me_pid; + } + + while (1) { + nreaders = env->me_lck->mti_numreaders; + for (slot = 0; slot < nreaders; slot++) + if (env->me_lck->mti_readers[slot].mr_pid == 0) + break; + + if (likely(slot < env->me_maxreaders)) + break; + + rc = mdbx_reader_check0(env, true, NULL); + if (rc != MDBX_RESULT_TRUE) { + mdbx_rdt_unlock(env); + return (rc == MDBX_SUCCESS) ? MDBX_READERS_FULL : rc; + } + } + + r = &env->me_lck->mti_readers[slot]; + /* Claim the reader slot, carefully since other code + * uses the reader table un-mutexed: First reset the + * slot, next publish it in lck->mti_numreaders. After + * that, it is safe for mdbx_env_close() to touch it. + * When it will be closed, we can finally claim it. */ + r->mr_pid = 0; + safe64_reset(&r->mr_txnid, true); + if (slot == nreaders) + env->me_lck->mti_numreaders = ++nreaders; + r->mr_tid = (env->me_flags & MDBX_NOTLS) ? 0 : tid; + r->mr_pid = env->me_pid; + mdbx_rdt_unlock(env); + + if (likely(env->me_flags & MDBX_ENV_TXKEY)) { + mdbx_assert(env, env->me_live_reader == env->me_pid); + thread_rthc_set(env->me_txkey, r); + } + } + + while (1) { + MDBX_meta *const meta = mdbx_meta_head(env); + mdbx_jitter4testing(false); + const txnid_t snap = mdbx_meta_txnid_fluid(env, meta); + mdbx_jitter4testing(false); + if (likely(r)) { + safe64_reset(&r->mr_txnid, false); + r->mr_snapshot_pages_used = meta->mm_geo.next; + r->mr_snapshot_pages_retired = meta->mm_pages_retired; + safe64_write(&r->mr_txnid, snap); + mdbx_jitter4testing(false); + mdbx_assert(env, r->mr_pid == mdbx_getpid()); + mdbx_assert( + env, r->mr_tid == + ((env->me_flags & MDBX_NOTLS) ? 0 : mdbx_thread_self())); + mdbx_assert(env, r->mr_txnid.inconsistent == snap); + mdbx_compiler_barrier(); + env->me_lck->mti_readers_refresh_flag = true; + mdbx_flush_incoherent_cpu_writeback(); + } + mdbx_jitter4testing(true); + + /* Snap the state from current meta-head */ + txn->mt_txnid = snap; + txn->mt_geo = meta->mm_geo; + memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDBX_db)); + txn->mt_canary = meta->mm_canary; + + /* LY: Retry on a race, ITS#7970. */ + mdbx_compiler_barrier(); + if (likely(meta == mdbx_meta_head(env) && + snap == mdbx_meta_txnid_fluid(env, meta) && + snap >= *env->me_oldest)) { + mdbx_jitter4testing(false); + break; + } + } + + if (unlikely(txn->mt_txnid == 0 || + txn->mt_txnid >= SAFE64_INVALID_THRESHOLD)) { + mdbx_error("%s", "environment corrupted by died writer, must shutdown!"); + rc = MDBX_CORRUPTED; + goto bailout; + } + mdbx_assert(env, txn->mt_txnid >= *env->me_oldest); + txn->to.reader = r; + txn->mt_dbxs = env->me_dbxs; /* mostly static anyway */ + mdbx_ensure(env, txn->mt_txnid >= + /* paranoia is appropriate here */ *env->me_oldest); + txn->mt_numdbs = env->me_numdbs; + } else { + if (unlikely(txn->mt_owner == tid)) + return MDBX_BUSY; + MDBX_lockinfo *const lck = env->me_lck; + if (lck && (env->me_flags & MDBX_NOTLS) == 0 && + (mdbx_runtime_flags & MDBX_DBG_LEGACY_OVERLAP) == 0) { + const unsigned snap_nreaders = lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; ++i) { + if (lck->mti_readers[i].mr_pid == env->me_pid && + unlikely(lck->mti_readers[i].mr_tid == tid)) { + const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid); + if (txnid >= MIN_TXNID && txnid < SAFE64_INVALID_THRESHOLD) + return MDBX_TXN_OVERLAPPING; + } + } + } + + /* Not yet touching txn == env->me_txn0, it may be active */ + mdbx_jitter4testing(false); + rc = mdbx_txn_lock(env, F_ISSET(flags, MDBX_TRYTXN)); + if (unlikely(rc)) + return rc; + if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { + mdbx_txn_unlock(env); + return MDBX_PANIC; + } +#if defined(_WIN32) || defined(_WIN64) + if (unlikely(!env->me_map)) { + mdbx_txn_unlock(env); + return MDBX_EPERM; + } +#endif /* Windows */ + + mdbx_jitter4testing(false); + MDBX_meta *meta = mdbx_meta_head(env); + mdbx_jitter4testing(false); + txn->mt_canary = meta->mm_canary; + const txnid_t snap = mdbx_meta_txnid_stable(env, meta); + txn->mt_txnid = safe64_txnid_next(snap); + if (unlikely(txn->mt_txnid >= SAFE64_INVALID_THRESHOLD)) { + mdbx_debug("%s", "txnid overflow!"); + rc = MDBX_TXN_FULL; + goto bailout; + } + + txn->mt_flags = flags; + txn->mt_child = NULL; + txn->tw.loose_pages = NULL; + txn->tw.loose_count = 0; + txn->tw.dirtyroom = MDBX_DPL_TXNFULL; + txn->tw.dirtylist = env->me_dirtylist; + mdbx_dpl_clear(txn->tw.dirtylist); + MDBX_PNL_SIZE(txn->tw.retired_pages) = 0; + txn->tw.spill_pages = NULL; + txn->tw.last_reclaimed = 0; + if (txn->tw.lifo_reclaimed) + MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) = 0; + env->me_txn = txn; + txn->mt_numdbs = env->me_numdbs; + memcpy(txn->mt_dbiseqs, env->me_dbiseqs, txn->mt_numdbs * sizeof(unsigned)); + /* Copy the DB info and flags */ + memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDBX_db)); + /* Moved to here to avoid a data race in read TXNs */ + txn->mt_geo = meta->mm_geo; + txn->tw.loose_refund_wl = txn->mt_next_pgno; + } + + /* Setup db info */ + mdbx_compiler_barrier(); + for (unsigned i = CORE_DBS; i < txn->mt_numdbs; i++) { + unsigned x = env->me_dbflags[i]; + txn->mt_dbs[i].md_flags = x & PERSISTENT_FLAGS; + txn->mt_dbflags[i] = + (x & MDBX_VALID) ? DB_VALID | DB_USRVALID | DB_STALE : 0; + } + txn->mt_dbflags[MAIN_DBI] = DB_VALID | DB_USRVALID; + txn->mt_dbflags[FREE_DBI] = DB_VALID; + + if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { + mdbx_warning("%s", "environment had fatal error, must shutdown!"); + rc = MDBX_PANIC; + } else { + const size_t size = pgno2bytes(env, txn->mt_end_pgno); + if (unlikely(size > env->me_dxb_mmap.limit)) { + if (txn->mt_geo.upper > MAX_PAGENO || + bytes2pgno(env, pgno2bytes(env, txn->mt_geo.upper)) != + txn->mt_geo.upper) { + rc = MDBX_UNABLE_EXTEND_MAPSIZE; + goto bailout; + } + rc = mdbx_mapresize(env, txn->mt_next_pgno, txn->mt_end_pgno, + txn->mt_geo.upper); + if (rc != MDBX_SUCCESS) + goto bailout; + } + if (txn->mt_flags & MDBX_RDONLY) { +#if defined(_WIN32) || defined(_WIN64) + if ((size > env->me_dbgeo.lower && env->me_dbgeo.shrink) || + (mdbx_RunningUnderWine() && + /* under Wine acquisition of remap_guard is always required, + * since Wine don't support section extending, + * i.e. in both cases unmap+map are required. */ + size < env->me_dbgeo.upper && env->me_dbgeo.grow)) { + txn->mt_flags |= MDBX_SHRINK_ALLOWED; + mdbx_srwlock_AcquireShared(&env->me_remap_guard); + } +#endif /* Windows */ + } else { + env->me_dxb_mmap.current = size; +#if defined(_WIN32) || defined(_WIN64) + env->me_dxb_mmap.filesize = + (env->me_dxb_mmap.filesize < size) ? size : env->me_dxb_mmap.filesize; +#endif /* Windows */ + } +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + mdbx_txn_valgrind(env, txn); +#endif + txn->mt_owner = tid; + return MDBX_SUCCESS; + } +bailout: + mdbx_tassert(txn, rc != MDBX_SUCCESS); + mdbx_txn_end(txn, MDBX_END_SLOT | MDBX_END_FAIL_BEGIN); + return rc; +} + +static __always_inline int check_txn(const MDBX_txn *txn, int bad_bits) { + if (unlikely(!txn)) + return MDBX_EINVAL; + + if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(txn->mt_flags & bad_bits)) + return MDBX_BAD_TXN; + +#if MDBX_TXN_CHECKOWNER + if ((txn->mt_flags & MDBX_NOTLS) == 0 && + unlikely(txn->mt_owner != mdbx_thread_self())) + return txn->mt_owner ? MDBX_THREAD_MISMATCH : MDBX_BAD_TXN; +#endif /* MDBX_TXN_CHECKOWNER */ + + return MDBX_SUCCESS; +} + +static __always_inline int check_txn_rw(const MDBX_txn *txn, int bad_bits) { + if (unlikely(!txn)) + return MDBX_EINVAL; + + if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(txn->mt_flags & bad_bits)) + return MDBX_BAD_TXN; + + if (unlikely(F_ISSET(txn->mt_flags, MDBX_RDONLY))) + return MDBX_EACCESS; + +#if MDBX_TXN_CHECKOWNER + if (unlikely(txn->mt_owner != mdbx_thread_self())) + return txn->mt_owner ? MDBX_THREAD_MISMATCH : MDBX_BAD_TXN; +#endif /* MDBX_TXN_CHECKOWNER */ + + return MDBX_SUCCESS; +} + +int mdbx_txn_renew(MDBX_txn *txn) { + int rc; + + if (unlikely(!txn)) + return MDBX_EINVAL; + + if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0)) + return MDBX_EINVAL; + + if (unlikely(txn->mt_owner != 0)) + return MDBX_THREAD_MISMATCH; + + rc = mdbx_txn_renew0(txn, MDBX_RDONLY); + if (rc == MDBX_SUCCESS) { + txn->mt_owner = mdbx_thread_self(); + mdbx_debug("renew txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO + "/%" PRIaPGNO, + txn->mt_txnid, (txn->mt_flags & MDBX_RDONLY) ? 'r' : 'w', + (void *)txn, (void *)txn->mt_env, txn->mt_dbs[MAIN_DBI].md_root, + txn->mt_dbs[FREE_DBI].md_root); + } + return rc; +} + +int mdbx_txn_begin(MDBX_env *env, MDBX_txn *parent, unsigned flags, + MDBX_txn **ret) { + MDBX_txn *txn; + int rc; + unsigned size, tsize; + + if (unlikely(!ret)) + return MDBX_EINVAL; + *ret = NULL; + + if (unlikely(!env)) + return MDBX_EINVAL; + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) + env->me_flags |= MDBX_FATAL_ERROR; +#endif /* MDBX_TXN_CHECKPID */ + + if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) + return MDBX_PANIC; + +#if !defined(_WIN32) && !defined(_WIN64) + /* Don't check env->me_map until lock to + * avoid race with re-mapping for shrinking */ + if (unlikely(!env->me_map)) + return MDBX_EPERM; +#endif /* Windows */ + + if (unlikely(flags & ~MDBX_TXN_BEGIN_FLAGS)) + return MDBX_EINVAL; + + if (unlikely(env->me_flags & MDBX_RDONLY & + ~flags)) /* write txn in RDONLY env */ + return MDBX_EACCESS; + + flags |= env->me_flags & MDBX_WRITEMAP; + + if (parent) { + /* Nested transactions: Max 1 child, write txns only, no writemap */ + rc = check_txn_rw(parent, MDBX_RDONLY | MDBX_WRITEMAP | MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + +#if defined(_WIN32) || defined(_WIN64) + if (unlikely(!env->me_map)) + return MDBX_EPERM; +#endif /* Windows */ + + flags |= parent->mt_flags & (MDBX_TXN_BEGIN_FLAGS | MDBX_TXN_SPILLS); + /* Child txns save MDBX_pgstate and use own copy of cursors */ + size = env->me_maxdbs * (sizeof(MDBX_db) + sizeof(MDBX_cursor *) + 1); + size += tsize = sizeof(MDBX_txn); + } else if (flags & MDBX_RDONLY) { + if (env->me_txn0 && + unlikely(env->me_txn0->mt_owner == mdbx_thread_self()) && + (mdbx_runtime_flags & MDBX_DBG_LEGACY_OVERLAP) == 0) + return MDBX_TXN_OVERLAPPING; + size = env->me_maxdbs * (sizeof(MDBX_db) + 1); + size += tsize = sizeof(MDBX_txn); + } else { + /* Reuse preallocated write txn. However, do not touch it until + * mdbx_txn_renew0() succeeds, since it currently may be active. */ + txn = env->me_txn0; + goto renew; + } + if (unlikely((txn = mdbx_malloc(size)) == NULL)) { + mdbx_debug("calloc: %s", "failed"); + return MDBX_ENOMEM; + } + memset(txn, 0, tsize); + txn->mt_dbxs = env->me_dbxs; /* static */ + txn->mt_dbs = (MDBX_db *)((char *)txn + tsize); + txn->mt_dbflags = (uint8_t *)txn + size - env->me_maxdbs; + txn->mt_flags = flags; + txn->mt_env = env; + + if (parent) { + mdbx_tassert(txn, mdbx_dirtylist_check(parent)); + txn->mt_cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs); + txn->mt_dbiseqs = parent->mt_dbiseqs; + txn->tw.dirtylist = mdbx_malloc(sizeof(MDBX_DP) * (MDBX_DPL_TXNFULL + 1)); + txn->tw.reclaimed_pglist = + mdbx_pnl_alloc(MDBX_PNL_ALLOCLEN(parent->tw.reclaimed_pglist)); + if (!txn->tw.dirtylist || !txn->tw.reclaimed_pglist) { + mdbx_pnl_free(txn->tw.reclaimed_pglist); + mdbx_free(txn->tw.dirtylist); + mdbx_free(txn); + return MDBX_ENOMEM; + } + mdbx_dpl_clear(txn->tw.dirtylist); + memcpy(txn->tw.reclaimed_pglist, parent->tw.reclaimed_pglist, + MDBX_PNL_SIZEOF(parent->tw.reclaimed_pglist)); + mdbx_assert(env, mdbx_pnl_check4assert( + txn->tw.reclaimed_pglist, + (txn->mt_next_pgno /* LY: intentional assigment here, + only for assertion */ + = parent->mt_next_pgno))); + + txn->tw.last_reclaimed = parent->tw.last_reclaimed; + if (parent->tw.lifo_reclaimed) { + txn->tw.lifo_reclaimed = parent->tw.lifo_reclaimed; + parent->tw.lifo_reclaimed = + (void *)(intptr_t)MDBX_PNL_SIZE(parent->tw.lifo_reclaimed); + } + + txn->tw.retired_pages = parent->tw.retired_pages; + parent->tw.retired_pages = + (void *)(intptr_t)MDBX_PNL_SIZE(parent->tw.retired_pages); + + txn->mt_txnid = parent->mt_txnid; + txn->tw.dirtyroom = parent->tw.dirtyroom; + txn->mt_geo = parent->mt_geo; + txn->tw.loose_refund_wl = parent->tw.loose_refund_wl; + txn->mt_canary = parent->mt_canary; + parent->mt_flags |= MDBX_TXN_HAS_CHILD; + parent->mt_child = txn; + txn->mt_parent = parent; + txn->mt_numdbs = parent->mt_numdbs; + txn->mt_owner = parent->mt_owner; + memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDBX_db)); + /* Copy parent's mt_dbflags, but clear DB_NEW */ + for (unsigned i = 0; i < txn->mt_numdbs; i++) + txn->mt_dbflags[i] = parent->mt_dbflags[i] & ~(DB_FRESH | DB_CREAT); + mdbx_tassert(parent, + parent->mt_parent || + parent->tw.dirtyroom + parent->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + env->me_txn = txn; + rc = mdbx_cursor_shadow(parent, txn); + if (unlikely(rc != MDBX_SUCCESS)) + mdbx_txn_end(txn, MDBX_END_FAIL_BEGINCHILD); + } else { /* MDBX_RDONLY */ + txn->mt_dbiseqs = env->me_dbiseqs; + renew: + rc = mdbx_txn_renew0(txn, flags); + } + + if (unlikely(rc != MDBX_SUCCESS)) { + if (txn != env->me_txn0) + mdbx_free(txn); + } else { + mdbx_assert(env, + (txn->mt_flags & ~(MDBX_NOTLS | MDBX_RDONLY | MDBX_WRITEMAP | + MDBX_SHRINK_ALLOWED | MDBX_NOMETASYNC | + MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) == 0); + txn->mt_signature = MDBX_MT_SIGNATURE; + *ret = txn; + mdbx_debug("begin txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO + "/%" PRIaPGNO, + txn->mt_txnid, (flags & MDBX_RDONLY) ? 'r' : 'w', (void *)txn, + (void *)env, txn->mt_dbs[MAIN_DBI].md_root, + txn->mt_dbs[FREE_DBI].md_root); + } + + return rc; +} + +int mdbx_txn_info(const MDBX_txn *txn, MDBX_txn_info *info, int scan_rlt) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!info)) + return MDBX_EINVAL; + + MDBX_env *const env = txn->mt_env; +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) { + env->me_flags |= MDBX_FATAL_ERROR; + return MDBX_PANIC; + } +#endif /* MDBX_TXN_CHECKPID */ + + info->txn_id = txn->mt_txnid; + info->txn_space_used = pgno2bytes(env, txn->mt_geo.next); + + if (txn->mt_flags & MDBX_RDONLY) { + const MDBX_meta *head_meta; + txnid_t head_txnid; + uint64_t head_retired; + do { + /* fetch info from volatile head */ + head_meta = mdbx_meta_head(env); + head_txnid = mdbx_meta_txnid_fluid(env, head_meta); + head_retired = head_meta->mm_pages_retired; + info->txn_space_limit_soft = pgno2bytes(env, head_meta->mm_geo.now); + info->txn_space_limit_hard = pgno2bytes(env, head_meta->mm_geo.upper); + info->txn_space_leftover = + pgno2bytes(env, head_meta->mm_geo.now - head_meta->mm_geo.next); + mdbx_compiler_barrier(); + } while (unlikely(head_meta != mdbx_meta_head(env) || + head_txnid != mdbx_meta_txnid_fluid(env, head_meta))); + + info->txn_reader_lag = head_txnid - info->txn_id; + info->txn_space_dirty = info->txn_space_retired = 0; + if (txn->to.reader && + head_retired > txn->to.reader->mr_snapshot_pages_retired) { + info->txn_space_dirty = info->txn_space_retired = + pgno2bytes(env, (pgno_t)(head_retired - + txn->to.reader->mr_snapshot_pages_retired)); + + size_t retired_next_reader = 0; + MDBX_lockinfo *const lck = env->me_lck; + if (scan_rlt && info->txn_reader_lag > 1 && lck) { + /* find next more recent reader */ + txnid_t next_reader = head_txnid; + const unsigned snap_nreaders = lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; ++i) { + retry: + if (lck->mti_readers[i].mr_pid) { + mdbx_jitter4testing(true); + const txnid_t snap_txnid = + safe64_read(&lck->mti_readers[i].mr_txnid); + const uint64_t snap_retired = + lck->mti_readers[i].mr_snapshot_pages_retired; + mdbx_compiler_barrier(); + if (unlikely(snap_retired != + lck->mti_readers[i].mr_snapshot_pages_retired) || + snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid)) + goto retry; + if (snap_txnid <= txn->mt_txnid) { + retired_next_reader = 0; + break; + } + if (snap_txnid < next_reader) { + next_reader = snap_txnid; + retired_next_reader = pgno2bytes( + env, (pgno_t)(snap_retired - + txn->to.reader->mr_snapshot_pages_retired)); + } + } + } + } + info->txn_space_dirty = retired_next_reader; + } + } else { + info->txn_space_limit_soft = pgno2bytes(env, txn->mt_geo.now); + info->txn_space_limit_hard = pgno2bytes(env, txn->mt_geo.upper); + info->txn_space_retired = pgno2bytes( + env, txn->mt_child ? (unsigned)(uintptr_t)txn->tw.retired_pages + : MDBX_PNL_SIZE(txn->tw.retired_pages)); + info->txn_space_leftover = pgno2bytes(env, txn->tw.dirtyroom); + info->txn_space_dirty = + pgno2bytes(env, MDBX_DPL_TXNFULL - txn->tw.dirtyroom); + info->txn_reader_lag = INT64_MAX; + MDBX_lockinfo *const lck = env->me_lck; + if (scan_rlt && lck) { + txnid_t oldest_snapshot = txn->mt_txnid; + const unsigned snap_nreaders = lck->mti_numreaders; + if (snap_nreaders) { + oldest_snapshot = mdbx_find_oldest(txn); + if (oldest_snapshot == txn->mt_txnid - 1) { + /* check if there is at least one reader */ + bool exists = false; + for (unsigned i = 0; i < snap_nreaders; ++i) { + if (lck->mti_readers[i].mr_pid && + txn->mt_txnid > safe64_read(&lck->mti_readers[i].mr_txnid)) { + exists = true; + break; + } + } + oldest_snapshot += !exists; + } + } + info->txn_reader_lag = txn->mt_txnid - oldest_snapshot; + } + } + + return MDBX_SUCCESS; +} + +MDBX_env *mdbx_txn_env(const MDBX_txn *txn) { + if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE || + txn->mt_env->me_signature != MDBX_ME_SIGNATURE)) + return NULL; + return txn->mt_env; +} + +uint64_t mdbx_txn_id(const MDBX_txn *txn) { + if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE)) + return 0; + return txn->mt_txnid; +} + +int mdbx_txn_flags(const MDBX_txn *txn) { + if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE)) + return -1; + return txn->mt_flags; +} + +/* Export or close DBI handles opened in this txn. */ +static void mdbx_dbis_update(MDBX_txn *txn, int keep) { + MDBX_dbi n = txn->mt_numdbs; + if (n) { + bool locked = false; + MDBX_env *env = txn->mt_env; + uint8_t *tdbflags = txn->mt_dbflags; + + for (unsigned i = n; --i >= CORE_DBS;) { + if (likely((tdbflags[i] & DB_CREAT) == 0)) + continue; + if (!locked) { + mdbx_ensure(env, + mdbx_fastmutex_acquire(&env->me_dbi_lock) == MDBX_SUCCESS); + locked = true; + } + if (keep) { + env->me_dbflags[i] = txn->mt_dbs[i].md_flags | MDBX_VALID; + mdbx_compiler_barrier(); + if (env->me_numdbs <= i) + env->me_numdbs = i + 1; + } else { + char *ptr = env->me_dbxs[i].md_name.iov_base; + if (ptr) { + env->me_dbxs[i].md_name.iov_len = 0; + mdbx_compiler_barrier(); + mdbx_assert(env, env->me_dbflags[i] == 0); + env->me_dbiseqs[i]++; + env->me_dbxs[i].md_name.iov_base = NULL; + mdbx_free(ptr); + } + } + } + + if (unlikely(locked)) + mdbx_ensure(env, + mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); + } +} + +/* End a transaction, except successful commit of a nested transaction. + * May be called twice for readonly txns: First reset it, then abort. + * [in] txn the transaction handle to end + * [in] mode why and how to end the transaction */ +static int mdbx_txn_end(MDBX_txn *txn, unsigned mode) { + MDBX_env *env = txn->mt_env; + static const char *const names[] = MDBX_END_NAMES; + +#if MDBX_TXN_CHECKPID + if (unlikely(txn->mt_env->me_pid != mdbx_getpid())) { + env->me_flags |= MDBX_FATAL_ERROR; + return MDBX_PANIC; + } +#endif /* MDBX_TXN_CHECKPID */ + + mdbx_debug("%s txn %" PRIaTXN "%c %p on mdbenv %p, root page %" PRIaPGNO + "/%" PRIaPGNO, + names[mode & MDBX_END_OPMASK], txn->mt_txnid, + (txn->mt_flags & MDBX_RDONLY) ? 'r' : 'w', (void *)txn, + (void *)env, txn->mt_dbs[MAIN_DBI].md_root, + txn->mt_dbs[FREE_DBI].md_root); + + mdbx_ensure(env, txn->mt_txnid >= + /* paranoia is appropriate here */ *env->me_oldest); + + int rc = MDBX_SUCCESS; + if (F_ISSET(txn->mt_flags, MDBX_RDONLY)) { + if (txn->to.reader) { + MDBX_reader *slot = txn->to.reader; + mdbx_assert(env, slot->mr_pid == env->me_pid); + if (likely(!F_ISSET(txn->mt_flags, MDBX_TXN_FINISHED))) { + mdbx_assert(env, txn->mt_txnid == slot->mr_txnid.inconsistent && + slot->mr_txnid.inconsistent >= + env->me_lck->mti_oldest_reader); +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + mdbx_txn_valgrind(env, nullptr); +#endif + slot->mr_snapshot_pages_used = 0; + safe64_reset(&slot->mr_txnid, false); + env->me_lck->mti_readers_refresh_flag = true; + mdbx_flush_incoherent_cpu_writeback(); + } else { + mdbx_assert(env, slot->mr_pid == env->me_pid); + mdbx_assert(env, + slot->mr_txnid.inconsistent >= SAFE64_INVALID_THRESHOLD); + } + if (mode & MDBX_END_SLOT) { + if ((env->me_flags & MDBX_ENV_TXKEY) == 0) + slot->mr_pid = 0; + txn->to.reader = NULL; + } + } +#if defined(_WIN32) || defined(_WIN64) + if (txn->mt_flags & MDBX_SHRINK_ALLOWED) + mdbx_srwlock_ReleaseShared(&env->me_remap_guard); +#endif + txn->mt_numdbs = 0; /* prevent further DBI activity */ + txn->mt_flags = MDBX_RDONLY | MDBX_TXN_FINISHED; + txn->mt_owner = 0; + } else if (!F_ISSET(txn->mt_flags, MDBX_TXN_FINISHED)) { +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + if (txn == env->me_txn0) + mdbx_txn_valgrind(env, nullptr); +#endif + /* Export or close DBI handles created in this txn */ + mdbx_dbis_update(txn, mode & MDBX_END_UPDATE); + if (!(mode & MDBX_END_EOTDONE)) /* !(already closed cursors) */ + mdbx_cursors_eot(txn, 0); + if (!(env->me_flags & MDBX_WRITEMAP)) + mdbx_dlist_free(txn); + + txn->mt_flags = MDBX_TXN_FINISHED; + txn->mt_owner = 0; + env->me_txn = txn->mt_parent; + if (txn == env->me_txn0) { + mdbx_assert(env, txn->mt_parent == NULL); + mdbx_pnl_shrink(&txn->tw.retired_pages); + mdbx_pnl_shrink(&txn->tw.reclaimed_pglist); + /* The writer mutex was locked in mdbx_txn_begin. */ + mdbx_txn_unlock(env); + } else { + mdbx_assert(env, txn->mt_parent != NULL); + mdbx_assert(env, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + MDBX_txn *const parent = txn->mt_parent; + env->me_txn->mt_child = NULL; + env->me_txn->mt_flags &= ~MDBX_TXN_HAS_CHILD; + mdbx_pnl_free(txn->tw.reclaimed_pglist); + mdbx_pnl_free(txn->tw.spill_pages); + + if (txn->tw.lifo_reclaimed) { + mdbx_assert(env, MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) >= + (unsigned)(uintptr_t)parent->tw.lifo_reclaimed); + MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) = + (unsigned)(uintptr_t)parent->tw.lifo_reclaimed; + parent->tw.lifo_reclaimed = txn->tw.lifo_reclaimed; + } + + if (txn->tw.retired_pages) { + mdbx_assert(env, MDBX_PNL_SIZE(txn->tw.retired_pages) >= + (unsigned)(uintptr_t)parent->tw.retired_pages); + MDBX_PNL_SIZE(txn->tw.retired_pages) = + (unsigned)(uintptr_t)parent->tw.retired_pages; + parent->tw.retired_pages = txn->tw.retired_pages; + } + + mdbx_free(txn->tw.dirtylist); + + if (parent->mt_geo.upper != txn->mt_geo.upper || + parent->mt_geo.now != txn->mt_geo.now) { + /* undo resize performed by child txn */ + rc = mdbx_mapresize(env, parent->mt_next_pgno, parent->mt_geo.now, + parent->mt_geo.upper); + if (rc == MDBX_RESULT_TRUE) { + /* unable undo resize (it is regular for Windows), + * therefore promote size changes from child to the parent txn */ + mdbx_notice("unable undo resize performed by child txn, promote to " + "the parent (%u->%u, %u->%u)", + txn->mt_geo.now, parent->mt_geo.now, txn->mt_geo.upper, + parent->mt_geo.upper); + parent->mt_geo.now = txn->mt_geo.now; + parent->mt_geo.upper = txn->mt_geo.upper; + rc = MDBX_SUCCESS; + } else if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_error("error %d while undo resize performed by child txn, fail " + "the parent", + rc); + parent->mt_flags |= MDBX_TXN_ERROR; + if (!env->me_dxb_mmap.address) + env->me_flags |= MDBX_FATAL_ERROR; + } + } + } + } + + mdbx_assert(env, txn == env->me_txn0 || txn->mt_owner == 0); + if ((mode & MDBX_END_FREE) != 0 && txn != env->me_txn0) { + txn->mt_signature = 0; + mdbx_free(txn); + } + + return rc; +} + +int mdbx_txn_reset(MDBX_txn *txn) { + int rc = check_txn(txn, 0); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + /* This call is only valid for read-only txns */ + if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0)) + return MDBX_EINVAL; + + /* LY: don't close DBI-handles */ + rc = mdbx_txn_end(txn, MDBX_END_RESET | MDBX_END_UPDATE); + if (rc == MDBX_SUCCESS) { + mdbx_tassert(txn, txn->mt_signature == MDBX_MT_SIGNATURE); + mdbx_tassert(txn, txn->mt_owner == 0); + } + return rc; +} + +int mdbx_txn_abort(MDBX_txn *txn) { + int rc = check_txn(txn, 0); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (F_ISSET(txn->mt_flags, MDBX_RDONLY)) + /* LY: don't close DBI-handles */ + return mdbx_txn_end(txn, MDBX_END_ABORT | MDBX_END_UPDATE | MDBX_END_SLOT | + MDBX_END_FREE); + + if (txn->mt_child) + mdbx_txn_abort(txn->mt_child); + + return mdbx_txn_end(txn, MDBX_END_ABORT | MDBX_END_SLOT | MDBX_END_FREE); +} + +/* Count all the pages in each DB and in the freelist and make sure + * it matches the actual number of pages being used. + * All named DBs must be open for a correct count. */ +static __cold int mdbx_audit_ex(MDBX_txn *txn, unsigned retired_stored, + bool dont_filter_gc) { + pgno_t pending = 0; + if ((txn->mt_flags & MDBX_RDONLY) == 0) { + pending = txn->tw.loose_count + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) + + (MDBX_PNL_SIZE(txn->tw.retired_pages) - retired_stored) + + txn->tw.retired2parent_count; + for (MDBX_txn *parent = txn->mt_parent; parent; parent = parent->mt_parent) + pending += parent->tw.loose_count; + } + + MDBX_cursor_couple cx; + int rc = mdbx_cursor_init(&cx.outer, txn, FREE_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + pgno_t freecount = 0; + MDBX_val key, data; + while ((rc = mdbx_cursor_get(&cx.outer, &key, &data, MDBX_NEXT)) == 0) { + if (!dont_filter_gc) { + if (unlikely(key.iov_len != sizeof(txnid_t))) + return MDBX_CORRUPTED; + txnid_t id = unaligned_peek_u64(4, key.iov_base); + if (txn->tw.lifo_reclaimed) { + for (unsigned i = 1; i <= MDBX_PNL_SIZE(txn->tw.lifo_reclaimed); ++i) + if (id == txn->tw.lifo_reclaimed[i]) + goto skip; + } else if (id <= txn->tw.last_reclaimed) + goto skip; + } + + freecount += *(pgno_t *)data.iov_base; + skip:; + } + mdbx_tassert(txn, rc == MDBX_NOTFOUND); + + for (MDBX_dbi i = FREE_DBI; i < txn->mt_numdbs; i++) + txn->mt_dbflags[i] &= ~DB_AUDITED; + + pgno_t count = 0; + for (MDBX_dbi i = FREE_DBI; i <= MAIN_DBI; i++) { + if (!(txn->mt_dbflags[i] & DB_VALID)) + continue; + rc = mdbx_cursor_init(&cx.outer, txn, i); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + txn->mt_dbflags[i] |= DB_AUDITED; + if (txn->mt_dbs[i].md_root == P_INVALID) + continue; + count += txn->mt_dbs[i].md_branch_pages + txn->mt_dbs[i].md_leaf_pages + + txn->mt_dbs[i].md_overflow_pages; + + if (i != MAIN_DBI) + continue; + rc = mdbx_page_search(&cx.outer, NULL, MDBX_PS_FIRST); + while (rc == MDBX_SUCCESS) { + MDBX_page *mp = cx.outer.mc_pg[cx.outer.mc_top]; + for (unsigned j = 0; j < page_numkeys(mp); j++) { + MDBX_node *node = page_node(mp, j); + if (node_flags(node) == F_SUBDATA) { + if (unlikely(node_ds(node) < sizeof(MDBX_db))) + return MDBX_CORRUPTED; + MDBX_db db_copy, *db; + memcpy(db = &db_copy, node_data(node), sizeof(db_copy)); + if ((txn->mt_flags & MDBX_RDONLY) == 0) { + for (MDBX_dbi k = txn->mt_numdbs; --k > MAIN_DBI;) { + if ((txn->mt_dbflags[k] & DB_VALID) && + /* txn->mt_dbxs[k].md_name.iov_len > 0 && */ + node_ks(node) == txn->mt_dbxs[k].md_name.iov_len && + memcmp(node_key(node), txn->mt_dbxs[k].md_name.iov_base, + node_ks(node)) == 0) { + txn->mt_dbflags[k] |= DB_AUDITED; + if (txn->mt_dbflags[k] & DB_DIRTY) { + mdbx_tassert(txn, (txn->mt_dbflags[k] & DB_STALE) == 0); + db = txn->mt_dbs + k; + } + break; + } + } + } + count += + db->md_branch_pages + db->md_leaf_pages + db->md_overflow_pages; + } + } + rc = mdbx_cursor_sibling(&cx.outer, 1); + } + mdbx_tassert(txn, rc == MDBX_NOTFOUND); + } + + for (MDBX_dbi i = FREE_DBI; i < txn->mt_numdbs; i++) { + if ((txn->mt_dbflags[i] & (DB_VALID | DB_AUDITED | DB_STALE)) != DB_VALID) + continue; + if (F_ISSET(txn->mt_dbflags[i], DB_DIRTY | DB_CREAT)) { + count += txn->mt_dbs[i].md_branch_pages + txn->mt_dbs[i].md_leaf_pages + + txn->mt_dbs[i].md_overflow_pages; + } else { + mdbx_warning("audit %s@%" PRIaTXN + ": unable account dbi %d / \"%*s\", state 0x%02x", + txn->mt_parent ? "nested-" : "", txn->mt_txnid, i, + (int)txn->mt_dbxs[i].md_name.iov_len, + (const char *)txn->mt_dbxs[i].md_name.iov_base, + txn->mt_dbflags[i]); + } + } + + if (pending + freecount + count + NUM_METAS == txn->mt_next_pgno) + return MDBX_SUCCESS; + + if ((txn->mt_flags & MDBX_RDONLY) == 0) + mdbx_error("audit @%" PRIaTXN ": %u(pending) = %u(loose-count) + " + "%u(reclaimed-list) + %u(retired-pending) - %u(retired-stored) " + "+ %u(retired2parent)", + txn->mt_txnid, pending, txn->tw.loose_count, + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist), + txn->tw.retired_pages ? MDBX_PNL_SIZE(txn->tw.retired_pages) : 0, + retired_stored, txn->tw.retired2parent_count); + mdbx_error("audit @%" PRIaTXN ": %" PRIaPGNO "(pending) + %" PRIaPGNO + "(free) + %" PRIaPGNO "(count) = %" PRIaPGNO + "(total) <> %" PRIaPGNO "(next-pgno)", + txn->mt_txnid, pending, freecount, count + NUM_METAS, + pending + freecount + count + NUM_METAS, txn->mt_next_pgno); + return MDBX_PROBLEM; +} + +static __always_inline unsigned backlog_size(MDBX_txn *txn) { + return MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) + txn->tw.loose_count; +} + +/* LY: Prepare a backlog of pages to modify GC itself, + * while reclaiming is prohibited. It should be enough to prevent search + * in mdbx_page_alloc() during a deleting, when GC tree is unbalanced. */ +static int mdbx_prep_backlog(MDBX_txn *txn, MDBX_cursor *gc_cursor, + const size_t pnl_bytes) { + const unsigned linear4list = number_of_ovpages(txn->mt_env, pnl_bytes); + const unsigned backlog4cow = txn->mt_dbs[FREE_DBI].md_depth; + const unsigned backlog4rebalance = backlog4cow + 1; + + if (likely(linear4list == 1 && + backlog_size(txn) > (pnl_bytes + ? backlog4rebalance + : (backlog4cow + backlog4rebalance)))) + return MDBX_SUCCESS; + + mdbx_trace(">> pnl_bytes %zu, backlog %u, 4list %u, 4cow %u, 4rebalance %u", + pnl_bytes, backlog_size(txn), linear4list, backlog4cow, + backlog4rebalance); + + gc_cursor->mc_flags &= ~C_RECLAIMING; + int err = mdbx_cursor_touch(gc_cursor); + mdbx_trace("== after-touch, backlog %u, err %d", backlog_size(txn), err); + + if (linear4list > 1 && err == MDBX_SUCCESS) { + err = mdbx_page_alloc(gc_cursor, linear4list, nullptr, + MDBX_ALLOC_GC | MDBX_ALLOC_CACHE); + mdbx_trace("== after-4linear, backlog %u, err %d", backlog_size(txn), err); + } + + while (backlog_size(txn) < backlog4cow + linear4list && err == MDBX_SUCCESS) + err = mdbx_page_alloc(gc_cursor, 1, NULL, MDBX_ALLOC_GC); + + gc_cursor->mc_flags |= C_RECLAIMING; + mdbx_trace("<< backlog %u, err %d", backlog_size(txn), err); + return (err != MDBX_NOTFOUND) ? err : MDBX_SUCCESS; +} + +static __inline void clean_reserved_gc_pnl(MDBX_env *env, MDBX_val pnl) { + /* PNL is initially empty, zero out at least the length */ + memset(pnl.iov_base, 0, sizeof(pgno_t)); + if ((env->me_flags & (MDBX_WRITEMAP | MDBX_NOMEMINIT)) == 0) + /* zero out to avoid leaking values from uninitialized malloc'ed memory + * to the file in non-writemap mode if length of the saving page-list + * was changed during space reservation. */ + memset(pnl.iov_base, 0, pnl.iov_len); +} + +/* Cleanup reclaimed GC records, than save the retired-list as of this + * transaction to GC (aka freeDB). This recursive changes the reclaimed-list + * loose-list and retired-list. Keep trying until it stabilizes. */ +static int mdbx_update_gc(MDBX_txn *txn) { + /* txn->tw.reclaimed_pglist[] can grow and shrink during this call. + * txn->tw.last_reclaimed and txn->tw.retired_pages[] can only grow. + * Page numbers cannot disappear from txn->tw.retired_pages[]. */ + MDBX_env *const env = txn->mt_env; + const bool lifo = (env->me_flags & MDBX_LIFORECLAIM) != 0; + const char *dbg_prefix_mode = lifo ? " lifo" : " fifo"; + (void)dbg_prefix_mode; + mdbx_trace("\n>>> @%" PRIaTXN, txn->mt_txnid); + + unsigned retired_stored = 0, loop = 0; + MDBX_cursor mc; + int rc = mdbx_cursor_init(&mc, txn, FREE_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout_notracking; + + mc.mc_flags |= C_RECLAIMING; + mc.mc_next = txn->mt_cursors[FREE_DBI]; + txn->mt_cursors[FREE_DBI] = &mc; + +retry: + mdbx_trace("%s", " >> restart"); + mdbx_tassert( + txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); + mdbx_tassert(txn, mdbx_dirtylist_check(txn)); + mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + if (unlikely(/* paranoia */ ++loop > 42)) { + mdbx_error("too more loops %u, bailout", loop); + rc = MDBX_PROBLEM; + goto bailout; + } + + rc = mdbx_prep_backlog(txn, &mc, MDBX_PNL_SIZEOF(txn->tw.retired_pages)); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + unsigned settled = 0, cleaned_gc_slot = 0, reused_gc_slot = 0, + filled_gc_slot = ~0u; + txnid_t cleaned_gc_id = 0, gc_rid = txn->tw.last_reclaimed; + while (true) { + /* Come back here after each Put() in case retired-list changed */ + MDBX_val key, data; + mdbx_trace("%s", " >> continue"); + + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + if (txn->tw.lifo_reclaimed) { + if (cleaned_gc_slot < MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)) { + settled = 0; + cleaned_gc_slot = 0; + reused_gc_slot = 0; + filled_gc_slot = ~0u; + /* LY: cleanup reclaimed records. */ + do { + cleaned_gc_id = txn->tw.lifo_reclaimed[++cleaned_gc_slot]; + mdbx_tassert(txn, + cleaned_gc_slot > 0 && cleaned_gc_id < *env->me_oldest); + key.iov_base = &cleaned_gc_id; + key.iov_len = sizeof(cleaned_gc_id); + rc = mdbx_cursor_get(&mc, &key, NULL, MDBX_SET); + if (rc == MDBX_NOTFOUND) + continue; + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + rc = mdbx_prep_backlog(txn, &mc, 0); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + mdbx_tassert(txn, cleaned_gc_id < *env->me_oldest); + mdbx_trace("%s.cleanup-reclaimed-id [%u]%" PRIaTXN, dbg_prefix_mode, + cleaned_gc_slot, cleaned_gc_id); + rc = mdbx_cursor_del(&mc, 0); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } while (cleaned_gc_slot < MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); + mdbx_txl_sort(txn->tw.lifo_reclaimed); + } + } else { + /* If using records from GC which we have not yet deleted, + * now delete them and any we reserved for me_reclaimed_pglist. */ + while (cleaned_gc_id <= txn->tw.last_reclaimed) { + gc_rid = cleaned_gc_id; + settled = 0; + rc = mdbx_cursor_first(&mc, &key, NULL); + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc == MDBX_NOTFOUND) + break; + goto bailout; + } + if (unlikely(key.iov_len != sizeof(txnid_t))) { + rc = MDBX_CORRUPTED; + goto bailout; + } + cleaned_gc_id = unaligned_peek_u64(4, key.iov_base); + if (unlikely(cleaned_gc_id < 1 || + cleaned_gc_id >= SAFE64_INVALID_THRESHOLD)) { + rc = MDBX_CORRUPTED; + goto bailout; + } + if (cleaned_gc_id > txn->tw.last_reclaimed) + break; + if (cleaned_gc_id < txn->tw.last_reclaimed) { + rc = mdbx_prep_backlog(txn, &mc, 0); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + mdbx_tassert(txn, cleaned_gc_id <= txn->tw.last_reclaimed); + mdbx_tassert(txn, cleaned_gc_id < *env->me_oldest); + mdbx_trace("%s.cleanup-reclaimed-id %" PRIaTXN, dbg_prefix_mode, + cleaned_gc_id); + rc = mdbx_cursor_del(&mc, 0); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + } + + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + mdbx_tassert(txn, mdbx_dirtylist_check(txn)); + mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + if (mdbx_audit_enabled()) { + rc = mdbx_audit_ex(txn, retired_stored, false); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + + /* return suitable into unallocated space */ + if (mdbx_refund(txn)) { + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + if (mdbx_audit_enabled()) { + rc = mdbx_audit_ex(txn, retired_stored, false); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + } + + /* handle loose pages - put ones into the reclaimed- or retired-list */ + if (txn->tw.loose_pages) { + /* Return loose page numbers to me_reclaimed_pglist, + * though usually none are left at this point. + * The pages themselves remain in dirtylist. */ + if (unlikely(!txn->tw.lifo_reclaimed && txn->tw.last_reclaimed < 1)) { + if (txn->tw.loose_count > 0) { + /* Put loose page numbers in tw.retired_pages, + * since unable to return them to me_reclaimed_pglist. */ + if (unlikely((rc = mdbx_pnl_need(&txn->tw.retired_pages, + txn->tw.loose_count)) != 0)) + goto bailout; + for (MDBX_page *mp = txn->tw.loose_pages; mp; mp = mp->mp_next) + mdbx_pnl_xappend(txn->tw.retired_pages, mp->mp_pgno); + mdbx_trace("%s: append %u loose-pages to retired-pages", + dbg_prefix_mode, txn->tw.loose_count); + } + } else { + /* Room for loose pages + temp PNL with same */ + rc = mdbx_pnl_need(&txn->tw.reclaimed_pglist, + 2 * txn->tw.loose_count + 2); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + MDBX_PNL loose = txn->tw.reclaimed_pglist + + MDBX_PNL_ALLOCLEN(txn->tw.reclaimed_pglist) - + txn->tw.loose_count - 1; + unsigned count = 0; + for (MDBX_page *mp = txn->tw.loose_pages; mp; mp = mp->mp_next) { + mdbx_tassert(txn, mp->mp_flags == (P_LOOSE | P_DIRTY)); + loose[++count] = mp->mp_pgno; + } + mdbx_tassert(txn, count == txn->tw.loose_count); + MDBX_PNL_SIZE(loose) = count; + mdbx_pnl_sort(loose); + mdbx_pnl_xmerge(txn->tw.reclaimed_pglist, loose); + mdbx_trace("%s: append %u loose-pages to reclaimed-pages", + dbg_prefix_mode, txn->tw.loose_count); + } + + /* filter-out list of dirty-pages from loose-pages */ + const MDBX_DPL dl = txn->tw.dirtylist; + unsigned w = 0; + for (unsigned r = w; ++r <= dl->length;) { + MDBX_page *dp = dl[r].ptr; + mdbx_tassert(txn, (dp->mp_flags & P_DIRTY)); + mdbx_tassert(txn, dl[r].pgno + (IS_OVERFLOW(dp) ? dp->mp_pages : 1) <= + txn->mt_next_pgno); + if ((dp->mp_flags & P_LOOSE) == 0) { + if (++w != r) + dl[w] = dl[r]; + } else { + mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); + if ((env->me_flags & MDBX_WRITEMAP) == 0) + mdbx_dpage_free(env, dp, 1); + } + } + mdbx_trace("%s: filtered-out loose-pages from %u -> %u dirty-pages", + dbg_prefix_mode, dl->length, w); + mdbx_tassert(txn, txn->tw.loose_count == dl->length - w); + dl->length = w; + dl->sorted = 0; + txn->tw.dirtyroom += txn->tw.loose_count; + txn->tw.loose_pages = NULL; + txn->tw.loose_count = 0; + } + + const unsigned amount = (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist); + /* handle retired-list - store ones into single gc-record */ + if (retired_stored < MDBX_PNL_SIZE(txn->tw.retired_pages)) { + if (unlikely(!retired_stored)) { + /* Make sure last page of GC is touched and on retired-list */ + mc.mc_flags &= ~C_RECLAIMING; + rc = mdbx_page_search(&mc, NULL, MDBX_PS_LAST | MDBX_PS_MODIFY); + mc.mc_flags |= C_RECLAIMING; + if (unlikely(rc != MDBX_SUCCESS) && rc != MDBX_NOTFOUND) + goto bailout; + } + /* Write to last page of GC */ + key.iov_len = sizeof(txn->mt_txnid); + key.iov_base = &txn->mt_txnid; + do { + data.iov_len = MDBX_PNL_SIZEOF(txn->tw.retired_pages); + mdbx_prep_backlog(txn, &mc, data.iov_len); + rc = mdbx_cursor_put(&mc, &key, &data, MDBX_RESERVE); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + /* Retry if tw.retired_pages[] grew during the Put() */ + } while (data.iov_len < MDBX_PNL_SIZEOF(txn->tw.retired_pages)); + + retired_stored = (unsigned)MDBX_PNL_SIZE(txn->tw.retired_pages); + mdbx_pnl_sort(txn->tw.retired_pages); + mdbx_assert(env, data.iov_len == MDBX_PNL_SIZEOF(txn->tw.retired_pages)); + memcpy(data.iov_base, txn->tw.retired_pages, data.iov_len); + + mdbx_trace("%s.put-retired #%u @ %" PRIaTXN, dbg_prefix_mode, + retired_stored, txn->mt_txnid); + + if (mdbx_log_enabled(MDBX_LOG_EXTRA)) { + unsigned i = retired_stored; + mdbx_debug_extra("PNL write txn %" PRIaTXN " root %" PRIaPGNO + " num %u, PNL", + txn->mt_txnid, txn->mt_dbs[FREE_DBI].md_root, i); + for (; i; i--) + mdbx_debug_extra_print(" %" PRIaPGNO, txn->tw.retired_pages[i]); + mdbx_debug_extra_print("%s", "\n"); + } + if (unlikely(amount != MDBX_PNL_SIZE(txn->tw.reclaimed_pglist))) { + mdbx_trace("%s.reclaimed-list changed %u -> %u, retry", dbg_prefix_mode, + amount, (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); + goto retry /* rare case, but avoids GC fragmentation and one loop. */; + } + continue; + } + + /* handle reclaimed and loost pages - merge and store both into gc */ + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + mdbx_tassert(txn, txn->tw.loose_count == 0); + + mdbx_trace("%s", " >> reserving"); + if (mdbx_audit_enabled()) { + rc = mdbx_audit_ex(txn, retired_stored, false); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + const unsigned left = amount - settled; + mdbx_trace("%s: amount %u, settled %d, left %d, lifo-reclaimed-slots %u, " + "reused-gc-slots %u", + dbg_prefix_mode, amount, settled, (int)left, + txn->tw.lifo_reclaimed + ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) + : 0, + reused_gc_slot); + if (0 >= (int)left) + break; + + const unsigned prefer_max_scatter = 257; + txnid_t reservation_gc_id; + if (lifo) { + if (txn->tw.lifo_reclaimed == nullptr) { + txn->tw.lifo_reclaimed = mdbx_txl_alloc(); + if (unlikely(!txn->tw.lifo_reclaimed)) { + rc = MDBX_ENOMEM; + goto bailout; + } + } + if ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) < + prefer_max_scatter && + left > ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - + reused_gc_slot) * + env->me_maxgc_ov1page) { + + /* LY: need just a txn-id for save page list. */ + mc.mc_flags &= ~C_RECLAIMING; + bool need_cleanup = false; + do { + rc = mdbx_page_alloc(&mc, 0, NULL, MDBX_ALLOC_GC); + if (likely(rc == MDBX_SUCCESS)) { + mdbx_trace("%s: took @%" PRIaTXN " from GC", dbg_prefix_mode, + MDBX_PNL_LAST(txn->tw.lifo_reclaimed)); + need_cleanup = true; + } + } while (rc == MDBX_SUCCESS && + (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) < + prefer_max_scatter && + left > ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - + reused_gc_slot) * + env->me_maxgc_ov1page); + mc.mc_flags |= C_RECLAIMING; + + if (likely(rc == MDBX_SUCCESS)) { + mdbx_trace("%s: got enough from GC.", dbg_prefix_mode); + continue; + } else if (unlikely(rc != MDBX_NOTFOUND)) + /* LY: some troubles... */ + goto bailout; + + if (MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)) { + if (need_cleanup) + mdbx_txl_sort(txn->tw.lifo_reclaimed); + gc_rid = MDBX_PNL_LAST(txn->tw.lifo_reclaimed); + } else { + mdbx_tassert(txn, txn->tw.last_reclaimed == 0); + txn->tw.last_reclaimed = gc_rid = mdbx_find_oldest(txn) - 1; + mdbx_trace("%s: none recycled yet, set rid to @%" PRIaTXN, + dbg_prefix_mode, gc_rid); + } + + /* LY: GC is empty, will look any free txn-id in high2low order. */ + while (MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) < prefer_max_scatter && + left > ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - + reused_gc_slot) * + env->me_maxgc_ov1page) { + if (unlikely(gc_rid < 2)) { + if (unlikely(MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) <= + reused_gc_slot)) { + mdbx_notice("** restart: reserve depleted (reused_gc_slot %u >= " + "lifo_reclaimed %u" PRIaTXN, + reused_gc_slot, + (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); + goto retry; + } + break; + } + + mdbx_tassert(txn, gc_rid > 1 && gc_rid < SAFE64_INVALID_THRESHOLD); + rc = mdbx_txl_append(&txn->tw.lifo_reclaimed, --gc_rid); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + if (reused_gc_slot) + /* rare case, but it is better to clear and re-create GC entries + * with less fragmentation. */ + need_cleanup = true; + else + cleaned_gc_slot += + 1 /* mark cleanup is not needed for added slot. */; + + mdbx_trace("%s: append @%" PRIaTXN + " to lifo-reclaimed, cleaned-gc-slot = %u", + dbg_prefix_mode, gc_rid, cleaned_gc_slot); + } + + if (need_cleanup) { + cleaned_gc_slot = 0; + mdbx_trace("%s: restart inner-loop to clear and re-create GC entries", + dbg_prefix_mode); + continue; + } + } + + const unsigned i = + (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - reused_gc_slot; + mdbx_tassert(txn, i > 0 && i <= MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); + reservation_gc_id = txn->tw.lifo_reclaimed[i]; + mdbx_trace("%s: take @%" PRIaTXN " from lifo-reclaimed[%u]", + dbg_prefix_mode, reservation_gc_id, i); + } else { + mdbx_tassert(txn, txn->tw.lifo_reclaimed == NULL); + if (unlikely(gc_rid == 0)) { + gc_rid = mdbx_find_oldest(txn) - 1; + rc = mdbx_cursor_get(&mc, &key, NULL, MDBX_FIRST); + if (rc == MDBX_SUCCESS) { + if (unlikely(key.iov_len != sizeof(txnid_t))) { + rc = MDBX_CORRUPTED; + goto bailout; + } + txnid_t gc_first = unaligned_peek_u64(4, key.iov_base); + if (unlikely(gc_first < 1 || gc_first >= SAFE64_INVALID_THRESHOLD)) { + rc = MDBX_CORRUPTED; + goto bailout; + } + if (gc_rid >= gc_first) + gc_rid = gc_first - 1; + if (unlikely(gc_rid == 0)) { + mdbx_error("%s", "** no GC tail-space to store"); + goto retry; + } + } else if (rc != MDBX_NOTFOUND) + goto bailout; + txn->tw.last_reclaimed = gc_rid; + } + reservation_gc_id = gc_rid--; + mdbx_trace("%s: take @%" PRIaTXN " from head-gc-id", dbg_prefix_mode, + reservation_gc_id); + } + ++reused_gc_slot; + + unsigned chunk = left; + if (unlikely(chunk > env->me_maxgc_ov1page)) { + const unsigned avail_gc_slots = + txn->tw.lifo_reclaimed + ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - + reused_gc_slot + 1 + : (gc_rid < INT16_MAX) ? (unsigned)gc_rid : INT16_MAX; + if (avail_gc_slots > 1) { + if (chunk < env->me_maxgc_ov1page * 2) + chunk /= 2; + else { + const unsigned threshold = + env->me_maxgc_ov1page * ((avail_gc_slots < prefer_max_scatter) + ? avail_gc_slots + : prefer_max_scatter); + if (left < threshold) + chunk = env->me_maxgc_ov1page; + else { + const unsigned tail = left - threshold + env->me_maxgc_ov1page + 1; + unsigned span = 1; + unsigned avail = (unsigned)((pgno2bytes(env, span) - PAGEHDRSZ) / + sizeof(pgno_t)) /*- 1 + span */; + if (tail > avail) { + for (unsigned i = amount - span; i > 0; --i) { + if (MDBX_PNL_ASCENDING + ? (txn->tw.reclaimed_pglist[i] + span) + : (txn->tw.reclaimed_pglist[i] - span) == + txn->tw.reclaimed_pglist[i + span]) { + span += 1; + avail = (unsigned)((pgno2bytes(env, span) - PAGEHDRSZ) / + sizeof(pgno_t)) - + 1 + span; + if (avail >= tail) + break; + } + } + } + + chunk = (avail >= tail) ? tail - span + : (avail_gc_slots > 3 && + reused_gc_slot < prefer_max_scatter - 3) + ? avail - span + : tail; + } + } + } + } + mdbx_tassert(txn, chunk > 0); + + mdbx_trace("%s: rc_rid %" PRIaTXN ", reused_gc_slot %u, reservation-id " + "%" PRIaTXN, + dbg_prefix_mode, gc_rid, reused_gc_slot, reservation_gc_id); + + mdbx_trace("%s: chunk %u, gc-per-ovpage %u", dbg_prefix_mode, chunk, + env->me_maxgc_ov1page); + + mdbx_tassert(txn, reservation_gc_id < *env->me_oldest); + if (unlikely(reservation_gc_id < 1 || + reservation_gc_id >= *env->me_oldest)) { + mdbx_error("%s", "** internal error (reservation_gc_id)"); + rc = MDBX_PROBLEM; + goto bailout; + } + + key.iov_len = sizeof(reservation_gc_id); + key.iov_base = &reservation_gc_id; + data.iov_len = (chunk + 1) * sizeof(pgno_t); + mdbx_trace("%s.reserve: %u [%u...%u] @%" PRIaTXN, dbg_prefix_mode, chunk, + settled + 1, settled + chunk + 1, reservation_gc_id); + mdbx_prep_backlog(txn, &mc, data.iov_len); + rc = mdbx_cursor_put(&mc, &key, &data, MDBX_RESERVE | MDBX_NOOVERWRITE); + mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, + txn->mt_next_pgno)); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + clean_reserved_gc_pnl(env, data); + settled += chunk; + mdbx_trace("%s.settled %u (+%u), continue", dbg_prefix_mode, settled, + chunk); + + if (txn->tw.lifo_reclaimed && + unlikely(amount < MDBX_PNL_SIZE(txn->tw.reclaimed_pglist))) { + mdbx_notice("** restart: reclaimed-list growth %u -> %u", amount, + (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); + goto retry; + } + + continue; + } + + mdbx_tassert( + txn, + cleaned_gc_slot == + (txn->tw.lifo_reclaimed ? MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) : 0)); + + mdbx_trace("%s", " >> filling"); + /* Fill in the reserved records */ + filled_gc_slot = + txn->tw.lifo_reclaimed + ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - reused_gc_slot + : reused_gc_slot; + rc = MDBX_SUCCESS; + mdbx_tassert( + txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); + mdbx_tassert(txn, mdbx_dirtylist_check(txn)); + if (MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)) { + MDBX_val key, data; + key.iov_len = data.iov_len = 0; /* avoid MSVC warning */ + key.iov_base = data.iov_base = NULL; + + const unsigned amount = MDBX_PNL_SIZE(txn->tw.reclaimed_pglist); + unsigned left = amount; + if (txn->tw.lifo_reclaimed == nullptr) { + mdbx_tassert(txn, lifo == 0); + rc = mdbx_cursor_first(&mc, &key, &data); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } else { + mdbx_tassert(txn, lifo != 0); + } + + while (true) { + txnid_t fill_gc_id; + mdbx_trace("%s: left %u of %u", dbg_prefix_mode, left, + (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); + if (txn->tw.lifo_reclaimed == nullptr) { + mdbx_tassert(txn, lifo == 0); + fill_gc_id = unaligned_peek_u64(4, key.iov_base); + if (filled_gc_slot-- == 0 || fill_gc_id > txn->tw.last_reclaimed) { + mdbx_notice( + "** restart: reserve depleted (filled_slot %u, fill_id %" PRIaTXN + " > last_reclaimed %" PRIaTXN, + filled_gc_slot, fill_gc_id, txn->tw.last_reclaimed); + goto retry; + } + } else { + mdbx_tassert(txn, lifo != 0); + if (++filled_gc_slot > + (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)) { + mdbx_notice("** restart: reserve depleted (filled_gc_slot %u > " + "lifo_reclaimed %u" PRIaTXN, + filled_gc_slot, + (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); + goto retry; + } + fill_gc_id = txn->tw.lifo_reclaimed[filled_gc_slot]; + mdbx_trace("%s.seek-reservation @%" PRIaTXN " at lifo_reclaimed[%u]", + dbg_prefix_mode, fill_gc_id, filled_gc_slot); + key.iov_base = &fill_gc_id; + key.iov_len = sizeof(fill_gc_id); + rc = mdbx_cursor_get(&mc, &key, &data, MDBX_SET_KEY); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + mdbx_tassert(txn, cleaned_gc_slot == + (txn->tw.lifo_reclaimed + ? MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) + : 0)); + mdbx_tassert(txn, fill_gc_id > 0 && fill_gc_id < *env->me_oldest); + key.iov_base = &fill_gc_id; + key.iov_len = sizeof(fill_gc_id); + + mdbx_tassert(txn, data.iov_len >= sizeof(pgno_t) * 2); + mc.mc_flags |= C_GCFREEZE; + unsigned chunk = (unsigned)(data.iov_len / sizeof(pgno_t)) - 1; + if (unlikely(chunk > left)) { + mdbx_trace("%s: chunk %u > left %u, @%" PRIaTXN, dbg_prefix_mode, chunk, + left, fill_gc_id); + if ((loop < 5 && chunk - left > loop / 2) || + chunk - left > env->me_maxgc_ov1page) { + data.iov_len = (left + 1) * sizeof(pgno_t); + if (loop < 7) + mc.mc_flags &= ~C_GCFREEZE; + } + chunk = left; + } + rc = mdbx_cursor_put(&mc, &key, &data, MDBX_CURRENT | MDBX_RESERVE); + mc.mc_flags &= ~C_GCFREEZE; + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + clean_reserved_gc_pnl(env, data); + + if (unlikely(txn->tw.loose_count || + amount != MDBX_PNL_SIZE(txn->tw.reclaimed_pglist))) { + mdbx_notice("** restart: reclaimed-list changed (%u -> %u, %u)", amount, + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist), + txn->tw.loose_count); + goto retry; + } + if (unlikely(txn->tw.lifo_reclaimed + ? cleaned_gc_slot < MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) + : cleaned_gc_id < txn->tw.last_reclaimed)) { + mdbx_notice("%s", "** restart: reclaimed-slots changed"); + goto retry; + } + + pgno_t *dst = data.iov_base; + *dst++ = chunk; + pgno_t *src = MDBX_PNL_BEGIN(txn->tw.reclaimed_pglist) + left - chunk; + memcpy(dst, src, chunk * sizeof(pgno_t)); + pgno_t *from = src, *to = src + chunk; + mdbx_trace("%s.fill: %u [ %u:%" PRIaPGNO "...%u:%" PRIaPGNO + "] @%" PRIaTXN, + dbg_prefix_mode, chunk, + (unsigned)(from - txn->tw.reclaimed_pglist), from[0], + (unsigned)(to - txn->tw.reclaimed_pglist), to[-1], fill_gc_id); + + left -= chunk; + if (mdbx_audit_enabled()) { + rc = mdbx_audit_ex(txn, retired_stored + amount - left, true); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } + if (left == 0) { + rc = MDBX_SUCCESS; + break; + } + + if (txn->tw.lifo_reclaimed == nullptr) { + mdbx_tassert(txn, lifo == 0); + rc = mdbx_cursor_next(&mc, &key, &data, MDBX_NEXT); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } else { + mdbx_tassert(txn, lifo != 0); + } + } + } + + mdbx_tassert(txn, rc == MDBX_SUCCESS); + if (unlikely(txn->tw.loose_count != 0 || + filled_gc_slot != + (txn->tw.lifo_reclaimed + ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) + : 0))) { + mdbx_notice("** restart: reserve excess (filled-slot %u, loose-count %u)", + filled_gc_slot, txn->tw.loose_count); + goto retry; + } + + mdbx_tassert(txn, + txn->tw.lifo_reclaimed == NULL || + cleaned_gc_slot == MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); + +bailout: + txn->mt_cursors[FREE_DBI] = mc.mc_next; + +bailout_notracking: + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) = 0; + mdbx_trace("<<< %u loops, rc = %d", loop, rc); + return rc; +} + +static int mdbx_flush_iov(MDBX_txn *const txn, struct iovec *iov, + unsigned iov_items, size_t iov_off, + size_t iov_bytes) { + MDBX_env *const env = txn->mt_env; + int rc = mdbx_pwritev(env->me_lazy_fd, iov, iov_items, iov_off, iov_bytes); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_error("Write error: %s", mdbx_strerror(rc)); + txn->mt_flags |= MDBX_TXN_ERROR; + } + + for (unsigned i = 0; i < iov_items; i++) + mdbx_dpage_free(env, (MDBX_page *)iov[i].iov_base, + bytes2pgno(env, iov[i].iov_len)); + + return rc; +} + +/* Flush (some) dirty pages to the map, after clearing their dirty flag. + * [in] txn the transaction that's being committed + * [in] keep number of initial pages in dirtylist to keep dirty. + * Returns 0 on success, non-zero on failure. */ +__hot static int mdbx_page_flush(MDBX_txn *txn, const unsigned keep) { + struct iovec iov[MDBX_COMMIT_PAGES]; + const MDBX_DPL dl = (keep || txn->tw.loose_count > 1) + ? mdbx_dpl_sort(txn->tw.dirtylist) + : txn->tw.dirtylist; + MDBX_env *const env = txn->mt_env; + pgno_t flush_begin = MAX_PAGENO; + pgno_t flush_end = MIN_PAGENO; + unsigned iov_items = 0; + size_t iov_bytes = 0; + size_t iov_off = 0; + unsigned r, w; + for (r = w = keep; ++r <= dl->length;) { + MDBX_page *dp = dl[r].ptr; + mdbx_tassert(txn, + dp->mp_pgno >= MIN_PAGENO && dp->mp_pgno < txn->mt_next_pgno); + mdbx_tassert(txn, dp->mp_flags & P_DIRTY); + + /* Don't flush this page yet */ + if (dp->mp_flags & P_KEEP) { + dp->mp_flags &= ~P_KEEP; + dl[++w] = dl[r]; + continue; + } + if (dp->mp_flags & P_LOOSE) { + dl[++w] = dl[r]; + continue; + } + + const unsigned npages = IS_OVERFLOW(dp) ? dp->mp_pages : 1; + flush_begin = (flush_begin < dp->mp_pgno) ? flush_begin : dp->mp_pgno; + flush_end = + (flush_end > dp->mp_pgno + npages) ? flush_end : dp->mp_pgno + npages; + *env->me_unsynced_pages += npages; + dp->mp_flags &= ~P_DIRTY; + dp->mp_txnid = txn->mt_txnid; + + if ((env->me_flags & MDBX_WRITEMAP) == 0) { + const size_t size = pgno2bytes(env, npages); + if (iov_off + iov_bytes != pgno2bytes(env, dp->mp_pgno) || + iov_items == ARRAY_LENGTH(iov) || iov_bytes + size > MAX_WRITE) { + if (iov_items) { + int rc = mdbx_flush_iov(txn, iov, iov_items, iov_off, iov_bytes); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; +#if defined(__linux__) || defined(__gnu_linux__) + if (mdbx_linux_kernel_version >= 0x02060b00) + /* Linux kernels older than version 2.6.11 ignore the addr and nbytes + * arguments, making this function fairly expensive. Therefore, the + * whole cache is always flushed. */ +#endif /* Linux */ + mdbx_flush_incoherent_mmap(env->me_map + iov_off, iov_bytes, + env->me_os_psize); + iov_items = 0; + iov_bytes = 0; + } + iov_off = pgno2bytes(env, dp->mp_pgno); + } + iov[iov_items].iov_base = (void *)dp; + iov[iov_items].iov_len = size; + iov_items += 1; + iov_bytes += size; + } + } + + if (iov_items) { + int rc = mdbx_flush_iov(txn, iov, iov_items, iov_off, iov_bytes); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + +#if defined(__linux__) || defined(__gnu_linux__) + if ((env->me_flags & MDBX_WRITEMAP) == 0 && + mdbx_linux_kernel_version < 0x02060b00) + /* Linux kernels older than version 2.6.11 ignore the addr and nbytes + * arguments, making this function fairly expensive. Therefore, the + * whole cache is always flushed. */ + mdbx_flush_incoherent_mmap(env->me_map + pgno2bytes(env, flush_begin), + pgno2bytes(env, flush_end - flush_begin), + env->me_os_psize); +#endif /* Linux */ + + /* TODO: use flush_begin & flush_end for msync() & sync_file_range(). */ + (void)flush_begin; + (void)flush_end; + + txn->tw.dirtyroom += r - 1 - w; + dl->length = w; + mdbx_tassert(txn, txn->mt_parent || + txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + return MDBX_SUCCESS; +} + +/* Check for misused dbi handles */ +#define TXN_DBI_CHANGED(txn, dbi) \ + ((txn)->mt_dbiseqs[dbi] != (txn)->mt_env->me_dbiseqs[dbi]) + +/* Import DBI which opened after txn started into context */ +static __cold bool mdbx_txn_import_dbi(MDBX_txn *txn, MDBX_dbi dbi) { + MDBX_env *env = txn->mt_env; + if (dbi < CORE_DBS || dbi >= env->me_numdbs) + return false; + + mdbx_ensure(env, mdbx_fastmutex_acquire(&env->me_dbi_lock) == MDBX_SUCCESS); + const unsigned snap_numdbs = env->me_numdbs; + mdbx_compiler_barrier(); + for (unsigned i = CORE_DBS; i < snap_numdbs; ++i) { + if (i >= txn->mt_numdbs) + txn->mt_dbflags[i] = 0; + if (!(txn->mt_dbflags[i] & DB_USRVALID) && + (env->me_dbflags[i] & MDBX_VALID)) { + txn->mt_dbs[i].md_flags = env->me_dbflags[i] & PERSISTENT_FLAGS; + txn->mt_dbflags[i] = DB_VALID | DB_USRVALID | DB_STALE; + mdbx_tassert(txn, txn->mt_dbxs[i].md_cmp != NULL); + } + } + txn->mt_numdbs = snap_numdbs; + + mdbx_ensure(env, mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); + return txn->mt_dbflags[dbi] & DB_USRVALID; +} + +/* Check txn and dbi arguments to a function */ +static __always_inline bool mdbx_txn_dbi_exists(MDBX_txn *txn, MDBX_dbi dbi, + unsigned validity) { + if (likely(dbi < txn->mt_numdbs && (txn->mt_dbflags[dbi] & validity))) + return true; + + return mdbx_txn_import_dbi(txn, dbi); +} + +int mdbx_txn_commit(MDBX_txn *txn) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + MDBX_env *env = txn->mt_env; +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) { + env->me_flags |= MDBX_FATAL_ERROR; + return MDBX_PANIC; + } +#endif /* MDBX_TXN_CHECKPID */ + + /* mdbx_txn_end() mode for a commit which writes nothing */ + unsigned end_mode = + MDBX_END_EMPTY_COMMIT | MDBX_END_UPDATE | MDBX_END_SLOT | MDBX_END_FREE; + if (unlikely(F_ISSET(txn->mt_flags, MDBX_RDONLY))) + goto done; + + if (txn->mt_child) { + rc = mdbx_txn_commit(txn->mt_child); + mdbx_tassert(txn, txn->mt_child == NULL); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + + if (unlikely(txn != env->me_txn)) { + mdbx_debug("%s", "attempt to commit unknown transaction"); + rc = MDBX_EINVAL; + goto fail; + } + + if (txn->mt_parent) { + MDBX_txn *const parent = txn->mt_parent; + mdbx_tassert(txn, mdbx_dirtylist_check(txn)); + + /* Preserve space for spill list to avoid parent's state corruption + * if allocation fails. */ + if (txn->tw.spill_pages && parent->tw.spill_pages) { + rc = mdbx_pnl_need(&parent->tw.spill_pages, + MDBX_PNL_SIZE(txn->tw.spill_pages)); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + + //------------------------------------------------------------------------- + + parent->tw.lifo_reclaimed = txn->tw.lifo_reclaimed; + txn->tw.lifo_reclaimed = NULL; + + parent->tw.retired_pages = txn->tw.retired_pages; + txn->tw.retired_pages = NULL; + + mdbx_pnl_free(parent->tw.reclaimed_pglist); + parent->tw.reclaimed_pglist = txn->tw.reclaimed_pglist; + txn->tw.reclaimed_pglist = NULL; + parent->tw.last_reclaimed = txn->tw.last_reclaimed; + + parent->mt_geo = txn->mt_geo; + parent->mt_canary = txn->mt_canary; + parent->mt_flags |= txn->mt_flags & MDBX_TXN_DIRTY; + + /* Merge our cursors into parent's and close them */ + mdbx_cursors_eot(txn, 1); + + /* Update parent's DB table. */ + memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDBX_db)); + parent->mt_numdbs = txn->mt_numdbs; + parent->mt_dbflags[FREE_DBI] = txn->mt_dbflags[FREE_DBI]; + parent->mt_dbflags[MAIN_DBI] = txn->mt_dbflags[MAIN_DBI]; + for (unsigned i = CORE_DBS; i < txn->mt_numdbs; i++) { + /* preserve parent's DB_NEW status */ + parent->mt_dbflags[i] = + txn->mt_dbflags[i] | (parent->mt_dbflags[i] & (DB_CREAT | DB_FRESH)); + } + + /* Remove refunded pages from parent's dirty & spill lists */ + MDBX_DPL dst = mdbx_dpl_sort(parent->tw.dirtylist); + while (dst->length && dst[dst->length].pgno >= parent->mt_next_pgno) { + MDBX_page *mp = dst[dst->length].ptr; + if (mp && (txn->mt_env->me_flags & MDBX_WRITEMAP) == 0) + mdbx_dpage_free(txn->mt_env, mp, IS_OVERFLOW(mp) ? mp->mp_pages : 1); + dst->length -= 1; + } + parent->tw.dirtyroom += dst->sorted - dst->length; + dst->sorted = dst->length; + mdbx_tassert(parent, + parent->mt_parent || + parent->tw.dirtyroom + parent->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + + if (parent->tw.spill_pages && MDBX_PNL_SIZE(parent->tw.spill_pages) > 0 && + MDBX_PNL_MOST(parent->tw.spill_pages) >= parent->mt_next_pgno << 1) { + const MDBX_PNL ps = parent->tw.spill_pages; +#if MDBX_PNL_ASCENDING + unsigned i = MDBX_PNL_SIZE(ps); + assert(MDBX_PNL_MOST(ps) == MDBX_PNL_LAST(ps)); + do + i -= 1; + while (i && ps[i] >= parent->mt_next_pgno << 1); + MDBX_PNL_SIZE(ps) = i; +#else + assert(MDBX_PNL_MOST(ps) == MDBX_PNL_FIRST(ps)); + unsigned i = 1, len = MDBX_PNL_SIZE(ps); + while (i < len && ps[i + 1] >= parent->mt_next_pgno << 1) + ++i; + MDBX_PNL_SIZE(ps) = len -= i; + for (unsigned k = 1; k <= len; ++k) + ps[k] = ps[k + i]; +#endif + } + + /* Remove anything in our dirty list from parent's spill list */ + MDBX_DPL src = mdbx_dpl_sort(txn->tw.dirtylist); + if (likely(src->length > 0) && parent->tw.spill_pages && + MDBX_PNL_SIZE(parent->tw.spill_pages) > 0) { + MDBX_PNL sp = parent->tw.spill_pages; + assert(mdbx_pnl_check4assert(sp, txn->mt_next_pgno)); + + const unsigned len = MDBX_PNL_SIZE(parent->tw.spill_pages); + MDBX_PNL_SIZE(sp) = ~(pgno_t)0; + + /* Mark our dirty pages as deleted in parent spill list */ + unsigned r, w, i = 1; + w = r = len; + do { + pgno_t pn = src[i].pgno << 1; + while (pn > sp[r]) + r--; + if (pn == sp[r]) { + sp[r] = 1; + w = --r; + } + } while (++i <= src->length); + + /* Squash deleted pagenums if we deleted any */ + for (r = w; ++r <= len;) + if ((sp[r] & 1) == 0) + sp[++w] = sp[r]; + MDBX_PNL_SIZE(sp) = w; + assert(mdbx_pnl_check4assert(sp, txn->mt_next_pgno << 1)); + } + + /* Remove anything in our spill list from parent's dirty list */ + if (txn->tw.spill_pages && MDBX_PNL_SIZE(txn->tw.spill_pages) > 0) { + const MDBX_PNL sp = txn->tw.spill_pages; + mdbx_pnl_sort(sp); + /* Scanning in ascend order */ + const int step = MDBX_PNL_ASCENDING ? 1 : -1; + const int begin = MDBX_PNL_ASCENDING ? 1 : MDBX_PNL_SIZE(sp); + const int end = MDBX_PNL_ASCENDING ? MDBX_PNL_SIZE(sp) + 1 : 0; + mdbx_tassert(txn, sp[begin] <= sp[end - step]); + + unsigned r, w = r = mdbx_dpl_search(dst, sp[begin] >> 1); + mdbx_tassert(txn, dst->sorted == dst->length); + for (int i = begin; r <= dst->length;) { + mdbx_tassert(txn, (sp[i] & 1) == 0); + const pgno_t pgno = sp[i] >> 1; + if (dst[r].pgno < pgno) { + dst[w++] = dst[r++]; + } else if (dst[r].pgno > pgno) { + i += step; + if (i == end) + while (r <= dst->length) + dst[w++] = dst[r++]; + } else { + MDBX_page *dp = dst[r++].ptr; + if ((env->me_flags & MDBX_WRITEMAP) == 0) + mdbx_dpage_free(env, dp, IS_OVERFLOW(dp) ? dp->mp_pages : 1); + } + } + mdbx_tassert(txn, r == dst->length + 1); + dst->length = w; + parent->tw.dirtyroom += r - w; + } + assert(dst->sorted == dst->length); + mdbx_tassert(parent, + parent->mt_parent || + parent->tw.dirtyroom + parent->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + + unsigned d, s, l; + /* Find length of merging our dirty list with parent's */ + for (l = 0, d = dst->length, s = src->length; d > 0 && s > 0; ++l) { + const pgno_t s_pgno = src[s].pgno; + const pgno_t d_pgno = dst[d].pgno; + d -= d_pgno >= s_pgno; + s -= d_pgno <= s_pgno; + } + assert(dst->sorted == dst->length); + dst->sorted = l += d + s; + assert(dst->sorted >= dst->length); + parent->tw.dirtyroom -= dst->sorted - dst->length; + + /* Merge our dirty list into parent's */ + for (d = dst->length, s = src->length; d > 0 && s > 0; --l) { + if (dst[d].pgno > src[s].pgno) + dst[l] = dst[d--]; + else if (dst[d].pgno < src[s].pgno) + dst[l] = src[s--]; + else { + MDBX_page *dp = dst[d--].ptr; + if (dp && (env->me_flags & MDBX_WRITEMAP) == 0) + mdbx_dpage_free(env, dp, IS_OVERFLOW(dp) ? dp->mp_pgno : 1); + dst[l] = src[s--]; + } + } + if (s) { + do + dst[l--] = src[s--]; + while (s > 0); + } else if (d) { + do + dst[l--] = dst[d--]; + while (d > 0); + } + assert(l == 0); + dst->length = dst->sorted; + mdbx_free(txn->tw.dirtylist); + txn->tw.dirtylist = nullptr; + mdbx_tassert(parent, + parent->mt_parent || + parent->tw.dirtyroom + parent->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + + if (txn->tw.spill_pages) { + if (parent->tw.spill_pages) { + /* Must not fail since space was preserved above. */ + rc = mdbx_pnl_append_list(&parent->tw.spill_pages, txn->tw.spill_pages); + mdbx_assert(env, rc == MDBX_SUCCESS); + (void)rc; + mdbx_pnl_free(txn->tw.spill_pages); + mdbx_pnl_sort(parent->tw.spill_pages); + } else { + parent->tw.spill_pages = txn->tw.spill_pages; + } + } + + parent->mt_flags &= ~(MDBX_TXN_SPILLS | MDBX_TXN_HAS_CHILD); + if (parent->tw.spill_pages) { + assert(mdbx_pnl_check4assert(parent->tw.spill_pages, + parent->mt_next_pgno << 1)); + if (MDBX_PNL_SIZE(parent->tw.spill_pages)) + parent->mt_flags |= MDBX_TXN_SPILLS; + } + + /* Append our loose page list to parent's */ + if (txn->tw.loose_pages) { + MDBX_page **lp = &parent->tw.loose_pages; + while (*lp) + lp = &(*lp)->mp_next; + *lp = txn->tw.loose_pages; + parent->tw.loose_count += txn->tw.loose_count; + } + if (txn->tw.retired2parent_pages) { + MDBX_page *mp = txn->tw.retired2parent_pages; + do { + MDBX_page *next = mp->mp_next; + rc = mdbx_page_loose(parent, mp); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + mp = next; + } while (mp); + } + + env->me_txn = parent; + parent->mt_child = NULL; + txn->mt_signature = 0; + mdbx_free(txn); + mdbx_tassert(parent, mdbx_dirtylist_check(parent)); + + /* Scan parent's loose page for suitable for refund */ + for (MDBX_page *mp = parent->tw.loose_pages; mp; mp = mp->mp_next) { + if (mp->mp_pgno == parent->mt_next_pgno - 1) { + mdbx_refund(parent); + break; + } + } + mdbx_tassert(parent, mdbx_dirtylist_check(parent)); + return MDBX_SUCCESS; + } + + mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + mdbx_cursors_eot(txn, 0); + end_mode |= MDBX_END_EOTDONE; + + if (txn->tw.dirtylist->length == 0 && + (txn->mt_flags & (MDBX_TXN_DIRTY | MDBX_TXN_SPILLS)) == 0) { + for (int i = txn->mt_numdbs; --i >= 0;) + mdbx_tassert(txn, (txn->mt_dbflags[i] & DB_DIRTY) == 0); + rc = MDBX_SUCCESS; + goto done; + } + + mdbx_debug("committing txn %" PRIaTXN " %p on mdbenv %p, root page %" PRIaPGNO + "/%" PRIaPGNO, + txn->mt_txnid, (void *)txn, (void *)env, + txn->mt_dbs[MAIN_DBI].md_root, txn->mt_dbs[FREE_DBI].md_root); + + /* Update DB root pointers */ + if (txn->mt_numdbs > CORE_DBS) { + MDBX_cursor mc; + MDBX_val data; + data.iov_len = sizeof(MDBX_db); + + rc = mdbx_cursor_init(&mc, txn, MAIN_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + for (MDBX_dbi i = CORE_DBS; i < txn->mt_numdbs; i++) { + if (txn->mt_dbflags[i] & DB_DIRTY) { + if (unlikely(TXN_DBI_CHANGED(txn, i))) { + rc = MDBX_BAD_DBI; + goto fail; + } + MDBX_db *db = &txn->mt_dbs[i]; + db->md_mod_txnid = txn->mt_txnid; + data.iov_base = db; + WITH_CURSOR_TRACKING(mc, + rc = mdbx_cursor_put(&mc, &txn->mt_dbxs[i].md_name, + &data, F_SUBDATA)); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + } + } + + rc = mdbx_update_gc(txn); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + + if (mdbx_audit_enabled()) { + rc = mdbx_audit_ex(txn, MDBX_PNL_SIZE(txn->tw.retired_pages), true); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + + rc = mdbx_page_flush(txn, 0); + if (likely(rc == MDBX_SUCCESS)) { + if (txn->mt_dbs[MAIN_DBI].md_flags & DB_DIRTY) + txn->mt_dbs[MAIN_DBI].md_mod_txnid = txn->mt_txnid; + + MDBX_meta meta, *head = mdbx_meta_head(env); + meta.mm_magic_and_version = head->mm_magic_and_version; + meta.mm_extra_flags = head->mm_extra_flags; + meta.mm_validator_id = head->mm_validator_id; + meta.mm_extra_pagehdr = head->mm_extra_pagehdr; + meta.mm_pages_retired = + head->mm_pages_retired + MDBX_PNL_SIZE(txn->tw.retired_pages); + + meta.mm_geo = txn->mt_geo; + meta.mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI]; + meta.mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI]; + meta.mm_canary = txn->mt_canary; + mdbx_meta_set_txnid(env, &meta, txn->mt_txnid); + + rc = mdbx_sync_locked( + env, env->me_flags | txn->mt_flags | MDBX_SHRINK_ALLOWED, &meta); + } + if (unlikely(rc != MDBX_SUCCESS)) { + env->me_flags |= MDBX_FATAL_ERROR; + goto fail; + } + + end_mode = MDBX_END_COMMITTED | MDBX_END_UPDATE | MDBX_END_EOTDONE; + +done: + return mdbx_txn_end(txn, end_mode); + +fail: + mdbx_txn_abort(txn); + return rc; +} + +static int __cold mdbx_validate_meta(MDBX_env *env, MDBX_meta *const meta, + uint64_t *filesize, + const MDBX_page *const page, + const unsigned meta_number, + MDBX_meta *dest, + const unsigned guess_pagesize) { + if (meta->mm_magic_and_version != MDBX_DATA_MAGIC && + meta->mm_magic_and_version != MDBX_DATA_MAGIC_DEVEL) { + mdbx_error("meta[%u] has invalid magic/version %" PRIx64, meta_number, + meta->mm_magic_and_version); + return ((meta->mm_magic_and_version >> 8) != MDBX_MAGIC) + ? MDBX_INVALID + : MDBX_VERSION_MISMATCH; + } + + if (page->mp_pgno != meta_number) { + mdbx_error("meta[%u] has invalid pageno %" PRIaPGNO, meta_number, + page->mp_pgno); + return MDBX_INVALID; + } + + if (page->mp_flags != P_META) { + mdbx_error("page #%u not a meta-page", meta_number); + return MDBX_INVALID; + } + + /* LY: check pagesize */ + if (!is_powerof2(meta->mm_psize) || meta->mm_psize < MIN_PAGESIZE || + meta->mm_psize > MAX_PAGESIZE) { + mdbx_notice("meta[%u] has invalid pagesize (%u), skip it", meta_number, + meta->mm_psize); + return is_powerof2(meta->mm_psize) ? MDBX_VERSION_MISMATCH : MDBX_INVALID; + } + + if (dest && meta_number == 0 && guess_pagesize != meta->mm_psize) { + dest->mm_psize = meta->mm_psize; + mdbx_verbose("meta[%u] took pagesize %u", meta_number, meta->mm_psize); + } + + if (safe64_read(&meta->mm_txnid_a) != safe64_read(&meta->mm_txnid_b)) { + mdbx_warning("meta[%u] not completely updated, skip it", meta_number); + return MDBX_RESULT_TRUE; + } + + /* LY: check signature as a checksum */ + if (META_IS_STEADY(meta) && meta->mm_datasync_sign != mdbx_meta_sign(meta)) { + mdbx_notice("meta[%u] has invalid steady-checksum (0x%" PRIx64 + " != 0x%" PRIx64 "), skip it", + meta_number, meta->mm_datasync_sign, mdbx_meta_sign(meta)); + return MDBX_RESULT_TRUE; + } + + mdbx_debug("read meta%" PRIaPGNO " = root %" PRIaPGNO "/%" PRIaPGNO + ", geo %" PRIaPGNO "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO + " +%u -%u, txn_id %" PRIaTXN ", %s", + page->mp_pgno, meta->mm_dbs[MAIN_DBI].md_root, + meta->mm_dbs[FREE_DBI].md_root, meta->mm_geo.lower, + meta->mm_geo.next, meta->mm_geo.now, meta->mm_geo.upper, + meta->mm_geo.grow, meta->mm_geo.shrink, + meta->mm_txnid_a.inconsistent, mdbx_durable_str(meta)); + + /* LY: check min-pages value */ + if (meta->mm_geo.lower < MIN_PAGENO || meta->mm_geo.lower > MAX_PAGENO) { + mdbx_notice("meta[%u] has invalid min-pages (%" PRIaPGNO "), skip it", + meta_number, meta->mm_geo.lower); + return MDBX_INVALID; + } + + /* LY: check max-pages value */ + if (meta->mm_geo.upper < MIN_PAGENO || meta->mm_geo.upper > MAX_PAGENO || + meta->mm_geo.upper < meta->mm_geo.lower) { + mdbx_notice("meta[%u] has invalid max-pages (%" PRIaPGNO "), skip it", + meta_number, meta->mm_geo.upper); + return MDBX_INVALID; + } + + /* LY: check last_pgno */ + if (meta->mm_geo.next < MIN_PAGENO || meta->mm_geo.next - 1 > MAX_PAGENO) { + mdbx_notice("meta[%u] has invalid next-pageno (%" PRIaPGNO "), skip it", + meta_number, meta->mm_geo.next); + return MDBX_CORRUPTED; + } + + /* LY: check filesize & used_bytes */ + const uint64_t used_bytes = meta->mm_geo.next * (uint64_t)meta->mm_psize; + if (used_bytes > *filesize) { + /* Here could be a race with DB-shrinking performed by other process */ + int err = mdbx_filesize(env->me_lazy_fd, filesize); + if (unlikely(err != MDBX_SUCCESS)) + return err; + if (used_bytes > *filesize) { + mdbx_notice("meta[%u] used-bytes (%" PRIu64 ") beyond filesize (%" PRIu64 + "), skip it", + meta_number, used_bytes, *filesize); + return MDBX_CORRUPTED; + } + } + + /* LY: check mapsize limits */ + const uint64_t mapsize_min = meta->mm_geo.lower * (uint64_t)meta->mm_psize; + STATIC_ASSERT(MAX_MAPSIZE < PTRDIFF_MAX - MAX_PAGESIZE); + STATIC_ASSERT(MIN_MAPSIZE < MAX_MAPSIZE); + if (mapsize_min < MIN_MAPSIZE || mapsize_min > MAX_MAPSIZE) { + mdbx_notice("meta[%u] has invalid min-mapsize (%" PRIu64 "), skip it", + meta_number, mapsize_min); + return MDBX_VERSION_MISMATCH; + } + + const uint64_t mapsize_max = meta->mm_geo.upper * (uint64_t)meta->mm_psize; + STATIC_ASSERT(MIN_MAPSIZE < MAX_MAPSIZE); + if (mapsize_max > MAX_MAPSIZE || + MAX_PAGENO < ceil_powerof2((size_t)mapsize_max, env->me_os_psize) / + (size_t)meta->mm_psize) { + if (meta->mm_geo.next - 1 > MAX_PAGENO || used_bytes > MAX_MAPSIZE) { + mdbx_notice("meta[%u] has too large max-mapsize (%" PRIu64 "), skip it", + meta_number, mapsize_max); + return MDBX_TOO_LARGE; + } + + /* allow to open large DB from a 32-bit environment */ + mdbx_notice("meta[%u] has too large max-mapsize (%" PRIu64 "), " + "but size of used space still acceptable (%" PRIu64 ")", + meta_number, mapsize_max, used_bytes); + meta->mm_geo.upper = (pgno_t)(MAX_MAPSIZE / meta->mm_psize); + } + + /* LY: check and silently put mm_geo.now into [geo.lower...geo.upper]. + * + * Copy-with-compaction by previous version of libmdbx could produce DB-file + * less than meta.geo.lower bound, in case actual filling is low or no data + * at all. This is not a problem as there is no damage or loss of data. + * Therefore it is better not to consider such situation as an error, but + * silently correct it. */ + if (meta->mm_geo.now < meta->mm_geo.lower) + meta->mm_geo.now = meta->mm_geo.lower; + if (meta->mm_geo.now > meta->mm_geo.upper && + meta->mm_geo.next <= meta->mm_geo.upper) + meta->mm_geo.now = meta->mm_geo.upper; + + if (meta->mm_geo.next > meta->mm_geo.now) { + mdbx_notice("meta[%u] next-pageno (%" PRIaPGNO + ") is beyond end-pgno (%" PRIaPGNO "), skip it", + meta_number, meta->mm_geo.next, meta->mm_geo.now); + return MDBX_CORRUPTED; + } + + /* LY: GC root */ + if (meta->mm_dbs[FREE_DBI].md_root == P_INVALID) { + if (meta->mm_dbs[FREE_DBI].md_branch_pages || + meta->mm_dbs[FREE_DBI].md_depth || meta->mm_dbs[FREE_DBI].md_entries || + meta->mm_dbs[FREE_DBI].md_leaf_pages || + meta->mm_dbs[FREE_DBI].md_overflow_pages) { + mdbx_notice("meta[%u] has false-empty GC, skip it", meta_number); + return MDBX_CORRUPTED; + } + } else if (meta->mm_dbs[FREE_DBI].md_root >= meta->mm_geo.next) { + mdbx_notice("meta[%u] has invalid GC-root %" PRIaPGNO ", skip it", + meta_number, meta->mm_dbs[FREE_DBI].md_root); + return MDBX_CORRUPTED; + } + + /* LY: MainDB root */ + if (meta->mm_dbs[MAIN_DBI].md_root == P_INVALID) { + if (meta->mm_dbs[MAIN_DBI].md_branch_pages || + meta->mm_dbs[MAIN_DBI].md_depth || meta->mm_dbs[MAIN_DBI].md_entries || + meta->mm_dbs[MAIN_DBI].md_leaf_pages || + meta->mm_dbs[MAIN_DBI].md_overflow_pages) { + mdbx_notice("meta[%u] has false-empty maindb", meta_number); + return MDBX_CORRUPTED; + } + } else if (meta->mm_dbs[MAIN_DBI].md_root >= meta->mm_geo.next) { + mdbx_notice("meta[%u] has invalid maindb-root %" PRIaPGNO ", skip it", + meta_number, meta->mm_dbs[MAIN_DBI].md_root); + return MDBX_CORRUPTED; + } + + if (safe64_read(&meta->mm_txnid_a) == 0) { + mdbx_warning("meta[%u] has zero txnid, skip it", meta_number); + return MDBX_RESULT_TRUE; + } + + return MDBX_SUCCESS; +} + +/* Read the environment parameters of a DB environment + * before mapping it into memory. */ +static int __cold mdbx_read_header(MDBX_env *env, MDBX_meta *dest, + uint64_t *filesize, + const int lck_exclusive) { + int rc = mdbx_filesize(env->me_lazy_fd, filesize); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + memset(dest, 0, sizeof(MDBX_meta)); + dest->mm_datasync_sign = MDBX_DATASIGN_WEAK; + rc = MDBX_CORRUPTED; + + /* Read twice all meta pages so we can find the latest one. */ + unsigned loop_limit = NUM_METAS * 2; + for (unsigned loop_count = 0; loop_count < loop_limit; ++loop_count) { + /* We don't know the page size on first time. + * So, just guess it. */ + unsigned guess_pagesize = dest->mm_psize; + if (guess_pagesize == 0) + guess_pagesize = + (loop_count > NUM_METAS) ? env->me_psize : env->me_os_psize; + + const unsigned meta_number = loop_count % NUM_METAS; + const unsigned offset = guess_pagesize * meta_number; + + char buffer[MIN_PAGESIZE]; + unsigned retryleft = 42; + while (1) { + mdbx_trace("reading meta[%d]: offset %u, bytes %u, retry-left %u", + meta_number, offset, MIN_PAGESIZE, retryleft); + int err = mdbx_pread(env->me_lazy_fd, buffer, MIN_PAGESIZE, offset); + if (err != MDBX_SUCCESS) { + if (err == MDBX_ENODATA && offset == 0 && loop_count == 0 && + *filesize == 0 && (env->me_flags & MDBX_RDONLY) == 0) + mdbx_notice("read meta: empty file (%d, %s)", err, + mdbx_strerror(err)); + else + mdbx_error("read meta[%u,%u]: %i, %s", offset, MIN_PAGESIZE, err, + mdbx_strerror(err)); + return err; + } + + char again[MIN_PAGESIZE]; + err = mdbx_pread(env->me_lazy_fd, again, MIN_PAGESIZE, offset); + if (err != MDBX_SUCCESS) { + mdbx_error("read meta[%u,%u]: %i, %s", offset, MIN_PAGESIZE, err, + mdbx_strerror(err)); + return err; + } + + if (memcmp(buffer, again, MIN_PAGESIZE) == 0 || --retryleft == 0) + break; + + mdbx_verbose("meta[%u] was updated, re-read it", meta_number); + } + + if (!retryleft) { + mdbx_error("meta[%u] is too volatile, skip it", meta_number); + continue; + } + + MDBX_page *const page = (MDBX_page *)buffer; + MDBX_meta *const meta = page_meta(page); + rc = mdbx_validate_meta(env, meta, filesize, page, meta_number, dest, + guess_pagesize); + if (rc != MDBX_SUCCESS) + continue; + + if (mdbx_meta_ot(prefer_steady, env, dest, meta)) { + *dest = *meta; + if (!META_IS_STEADY(dest)) + loop_limit += 1; /* LY: should re-read to hush race with update */ + mdbx_verbose("latch meta[%u]", meta_number); + } + } + + if (dest->mm_psize == 0 || + (!META_IS_STEADY(dest) && + !meta_weak_acceptable(env, dest, lck_exclusive))) { + mdbx_error("%s", "no usable meta-pages, database is corrupted"); + return rc; + } + + return MDBX_SUCCESS; +} + +static MDBX_page *__cold mdbx_meta_model(const MDBX_env *env, MDBX_page *model, + unsigned num) { + + mdbx_ensure(env, is_powerof2(env->me_psize)); + mdbx_ensure(env, env->me_psize >= MIN_PAGESIZE); + mdbx_ensure(env, env->me_psize <= MAX_PAGESIZE); + mdbx_ensure(env, env->me_dbgeo.lower >= MIN_MAPSIZE); + mdbx_ensure(env, env->me_dbgeo.upper <= MAX_MAPSIZE); + mdbx_ensure(env, env->me_dbgeo.now >= env->me_dbgeo.lower); + mdbx_ensure(env, env->me_dbgeo.now <= env->me_dbgeo.upper); + + memset(model, 0, sizeof(*model)); + model->mp_pgno = num; + model->mp_flags = P_META; + MDBX_meta *const model_meta = page_meta(model); + model_meta->mm_magic_and_version = MDBX_DATA_MAGIC; + + model_meta->mm_geo.lower = bytes2pgno(env, env->me_dbgeo.lower); + model_meta->mm_geo.upper = bytes2pgno(env, env->me_dbgeo.upper); + model_meta->mm_geo.grow = (uint16_t)bytes2pgno(env, env->me_dbgeo.grow); + model_meta->mm_geo.shrink = (uint16_t)bytes2pgno(env, env->me_dbgeo.shrink); + model_meta->mm_geo.now = bytes2pgno(env, env->me_dbgeo.now); + model_meta->mm_geo.next = NUM_METAS; + + mdbx_ensure(env, model_meta->mm_geo.lower >= MIN_PAGENO); + mdbx_ensure(env, model_meta->mm_geo.upper <= MAX_PAGENO); + mdbx_ensure(env, model_meta->mm_geo.now >= model_meta->mm_geo.lower); + mdbx_ensure(env, model_meta->mm_geo.now <= model_meta->mm_geo.upper); + mdbx_ensure(env, model_meta->mm_geo.next >= MIN_PAGENO); + mdbx_ensure(env, model_meta->mm_geo.next <= model_meta->mm_geo.now); + mdbx_ensure(env, + model_meta->mm_geo.grow == bytes2pgno(env, env->me_dbgeo.grow)); + mdbx_ensure(env, model_meta->mm_geo.shrink == + bytes2pgno(env, env->me_dbgeo.shrink)); + + model_meta->mm_psize = env->me_psize; + model_meta->mm_flags = (uint16_t)env->me_flags; + model_meta->mm_flags |= + MDBX_INTEGERKEY; /* this is mm_dbs[FREE_DBI].md_flags */ + model_meta->mm_dbs[FREE_DBI].md_root = P_INVALID; + model_meta->mm_dbs[MAIN_DBI].md_root = P_INVALID; + mdbx_meta_set_txnid(env, model_meta, MIN_TXNID + num); + model_meta->mm_datasync_sign = mdbx_meta_sign(model_meta); + return (MDBX_page *)((uint8_t *)model + env->me_psize); +} + +/* Fill in most of the zeroed meta-pages for an empty database environment. + * Return pointer to recenly (head) meta-page. */ +static MDBX_meta *__cold mdbx_init_metas(const MDBX_env *env, void *buffer) { + MDBX_page *page0 = (MDBX_page *)buffer; + MDBX_page *page1 = mdbx_meta_model(env, page0, 0); + MDBX_page *page2 = mdbx_meta_model(env, page1, 1); + mdbx_meta_model(env, page2, 2); + mdbx_assert(env, !mdbx_meta_eq(env, page_meta(page0), page_meta(page1))); + mdbx_assert(env, !mdbx_meta_eq(env, page_meta(page1), page_meta(page2))); + mdbx_assert(env, !mdbx_meta_eq(env, page_meta(page2), page_meta(page0))); + return page_meta(page2); +} + +static int mdbx_sync_locked(MDBX_env *env, unsigned flags, + MDBX_meta *const pending) { + mdbx_assert(env, ((env->me_flags ^ flags) & MDBX_WRITEMAP) == 0); + MDBX_meta *const meta0 = METAPAGE(env, 0); + MDBX_meta *const meta1 = METAPAGE(env, 1); + MDBX_meta *const meta2 = METAPAGE(env, 2); + MDBX_meta *const head = mdbx_meta_head(env); + + mdbx_assert(env, mdbx_meta_eq_mask(env) == 0); + mdbx_assert(env, + pending < METAPAGE(env, 0) || pending > METAPAGE(env, NUM_METAS)); + mdbx_assert(env, (env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR)) == 0); + mdbx_assert(env, pending->mm_geo.next <= pending->mm_geo.now); + + if (flags & (MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) { + /* Check auto-sync conditions */ + const pgno_t autosync_threshold = *env->me_autosync_threshold; + const uint64_t autosync_period = *env->me_autosync_period; + if ((autosync_threshold && *env->me_unsynced_pages >= autosync_threshold) || + (autosync_period && + mdbx_osal_monotime() - *env->me_sync_timestamp >= autosync_period)) + flags &= MDBX_WRITEMAP | MDBX_SHRINK_ALLOWED; /* force steady */ + } + + pgno_t shrink = 0; + if (flags & MDBX_SHRINK_ALLOWED) { + /* LY: check conditions to discard unused pages */ + const pgno_t largest_pgno = mdbx_find_largest( + env, (head->mm_geo.next > pending->mm_geo.next) ? head->mm_geo.next + : pending->mm_geo.next); + mdbx_assert(env, largest_pgno >= NUM_METAS); +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + const pgno_t edge = env->me_poison_edge; + if (edge > largest_pgno) { + env->me_poison_edge = largest_pgno; + VALGRIND_MAKE_MEM_NOACCESS(env->me_map + pgno2bytes(env, largest_pgno), + pgno2bytes(env, edge - largest_pgno)); + ASAN_POISON_MEMORY_REGION(env->me_map + pgno2bytes(env, largest_pgno), + pgno2bytes(env, edge - largest_pgno)); + } +#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ +#if defined(MADV_DONTNEED) + const size_t largest_bytes = pgno2bytes(env, largest_pgno); + /* threshold to avoid unreasonable frequent madvise() calls */ + const size_t madvise_treshold = (largest_bytes < 65536 * 256) + ? 65536 + : (largest_bytes > MEGABYTE * 4 * 256) + ? MEGABYTE * 4 + : largest_bytes >> 10; + const size_t discard_edge_bytes = bytes_align2os_bytes( + env, ((MDBX_RDONLY & + (env->me_lck ? env->me_lck->mti_envmode : env->me_flags)) + ? largest_bytes + : largest_bytes + madvise_treshold)); + const pgno_t discard_edge_pgno = bytes2pgno(env, discard_edge_bytes); + const pgno_t prev_discarded_pgno = *env->me_discarded_tail; + if (prev_discarded_pgno >= + discard_edge_pgno + bytes2pgno(env, madvise_treshold)) { + mdbx_notice("open-MADV_%s %u..%u", "DONTNEED", *env->me_discarded_tail, + largest_pgno); + *env->me_discarded_tail = discard_edge_pgno; + const size_t prev_discarded_bytes = + ceil_powerof2(pgno2bytes(env, prev_discarded_pgno), env->me_os_psize); + mdbx_ensure(env, prev_discarded_bytes > discard_edge_bytes); + int advise = MADV_DONTNEED; +#if defined(MADV_FREE) && \ + 0 /* MADV_FREE works for only anonymous vma at the moment */ + if ((env->me_flags & MDBX_WRITEMAP) && + mdbx_linux_kernel_version > 0x04050000) + advise = MADV_FREE; +#endif /* MADV_FREE */ + int err = madvise(env->me_map + discard_edge_bytes, + prev_discarded_bytes - discard_edge_bytes, advise) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; + } +#endif /* MADV_FREE || MADV_DONTNEED */ + + /* LY: check conditions to shrink datafile */ + const pgno_t backlog_gap = 3 + pending->mm_dbs[FREE_DBI].md_depth * 3; + if (pending->mm_geo.shrink && pending->mm_geo.now - pending->mm_geo.next > + pending->mm_geo.shrink + backlog_gap) { + if (pending->mm_geo.now > largest_pgno && + pending->mm_geo.now - largest_pgno > + pending->mm_geo.shrink + backlog_gap) { + const pgno_t aligner = pending->mm_geo.grow ? pending->mm_geo.grow + : pending->mm_geo.shrink; + const pgno_t with_backlog_gap = largest_pgno + backlog_gap; + const pgno_t aligned = pgno_align2os_pgno( + env, with_backlog_gap + aligner - with_backlog_gap % aligner); + const pgno_t bottom = + (aligned > pending->mm_geo.lower) ? aligned : pending->mm_geo.lower; + if (pending->mm_geo.now > bottom) { + if (META_IS_STEADY(mdbx_meta_steady(env))) + /* force steady, but only if steady-checkpoint is present */ + flags &= MDBX_WRITEMAP | MDBX_SHRINK_ALLOWED; + shrink = pending->mm_geo.now - bottom; + pending->mm_geo.now = bottom; + if (mdbx_meta_txnid_stable(env, head) == + pending->mm_txnid_a.inconsistent) + mdbx_meta_set_txnid( + env, pending, + safe64_txnid_next(pending->mm_txnid_a.inconsistent)); + } + } + } + } + + /* LY: step#1 - sync previously written/updated data-pages */ + int rc = *env->me_unsynced_pages ? MDBX_RESULT_TRUE /* carry non-steady */ + : MDBX_RESULT_FALSE /* carry steady */; + if (rc != MDBX_RESULT_FALSE && (flags & MDBX_SAFE_NOSYNC) == 0) { + mdbx_assert(env, ((flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); + MDBX_meta *const recent_steady_meta = mdbx_meta_steady(env); + if (flags & MDBX_WRITEMAP) { + const size_t begin = + floor_powerof2(pgno2bytes(env, NUM_METAS), env->me_os_psize); + const size_t end = pgno_align2os_bytes(env, pending->mm_geo.next); + if (end > begin) { + rc = mdbx_msync(&env->me_dxb_mmap, begin, end - begin, + flags & MDBX_MAPASYNC); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + rc = MDBX_RESULT_TRUE /* carry non-steady */; + if ((flags & MDBX_MAPASYNC) == 0) { + if (unlikely(pending->mm_geo.next > recent_steady_meta->mm_geo.now)) { + rc = mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_SIZE); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + rc = MDBX_RESULT_FALSE /* carry steady */; + } + } else { + rc = mdbx_filesync(env->me_lazy_fd, + (pending->mm_geo.next > recent_steady_meta->mm_geo.now) + ? MDBX_SYNC_DATA | MDBX_SYNC_SIZE + : MDBX_SYNC_DATA); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + } + } + + /* Steady or Weak */ + if (rc == MDBX_RESULT_FALSE /* carry steady */) { + pending->mm_datasync_sign = mdbx_meta_sign(pending); + *env->me_unsynced_pages = 0; + *env->me_sync_timestamp = mdbx_osal_monotime(); + } else { + assert(rc == MDBX_RESULT_TRUE /* carry non-steady */); + pending->mm_datasync_sign = MDBX_DATASIGN_WEAK; + } + + MDBX_meta *target = nullptr; + if (mdbx_meta_txnid_stable(env, head) == pending->mm_txnid_a.inconsistent) { + mdbx_assert(env, memcmp(&head->mm_dbs, &pending->mm_dbs, + sizeof(head->mm_dbs)) == 0); + mdbx_assert(env, memcmp(&head->mm_canary, &pending->mm_canary, + sizeof(head->mm_canary)) == 0); + mdbx_assert(env, memcmp(&head->mm_geo, &pending->mm_geo, + sizeof(pending->mm_geo)) == 0); + if (!META_IS_STEADY(head) && META_IS_STEADY(pending)) + target = head; + else { + mdbx_ensure(env, mdbx_meta_eq(env, head, pending)); + mdbx_debug("%s", "skip update meta"); + return MDBX_SUCCESS; + } + } else if (head == meta0) + target = mdbx_meta_ancient(prefer_steady, env, meta1, meta2); + else if (head == meta1) + target = mdbx_meta_ancient(prefer_steady, env, meta0, meta2); + else { + mdbx_assert(env, head == meta2); + target = mdbx_meta_ancient(prefer_steady, env, meta0, meta1); + } + + /* LY: step#2 - update meta-page. */ + mdbx_debug("writing meta%" PRIaPGNO " = root %" PRIaPGNO "/%" PRIaPGNO + ", geo %" PRIaPGNO "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO + " +%u -%u, txn_id %" PRIaTXN ", %s", + data_page(target)->mp_pgno, pending->mm_dbs[MAIN_DBI].md_root, + pending->mm_dbs[FREE_DBI].md_root, pending->mm_geo.lower, + pending->mm_geo.next, pending->mm_geo.now, pending->mm_geo.upper, + pending->mm_geo.grow, pending->mm_geo.shrink, + pending->mm_txnid_a.inconsistent, mdbx_durable_str(pending)); + + mdbx_debug("meta0: %s, %s, txn_id %" PRIaTXN ", root %" PRIaPGNO + "/%" PRIaPGNO, + (meta0 == head) ? "head" : (meta0 == target) ? "tail" : "stay", + mdbx_durable_str(meta0), mdbx_meta_txnid_fluid(env, meta0), + meta0->mm_dbs[MAIN_DBI].md_root, meta0->mm_dbs[FREE_DBI].md_root); + mdbx_debug("meta1: %s, %s, txn_id %" PRIaTXN ", root %" PRIaPGNO + "/%" PRIaPGNO, + (meta1 == head) ? "head" : (meta1 == target) ? "tail" : "stay", + mdbx_durable_str(meta1), mdbx_meta_txnid_fluid(env, meta1), + meta1->mm_dbs[MAIN_DBI].md_root, meta1->mm_dbs[FREE_DBI].md_root); + mdbx_debug("meta2: %s, %s, txn_id %" PRIaTXN ", root %" PRIaPGNO + "/%" PRIaPGNO, + (meta2 == head) ? "head" : (meta2 == target) ? "tail" : "stay", + mdbx_durable_str(meta2), mdbx_meta_txnid_fluid(env, meta2), + meta2->mm_dbs[MAIN_DBI].md_root, meta2->mm_dbs[FREE_DBI].md_root); + + mdbx_assert(env, !mdbx_meta_eq(env, pending, meta0)); + mdbx_assert(env, !mdbx_meta_eq(env, pending, meta1)); + mdbx_assert(env, !mdbx_meta_eq(env, pending, meta2)); + + mdbx_assert(env, ((env->me_flags ^ flags) & MDBX_WRITEMAP) == 0); + mdbx_ensure(env, target == head || mdbx_meta_txnid_stable(env, target) < + pending->mm_txnid_a.inconsistent); + if (flags & MDBX_WRITEMAP) { + mdbx_jitter4testing(true); + if (likely(target != head)) { + /* LY: 'invalidate' the meta. */ + mdbx_meta_update_begin(env, target, pending->mm_txnid_a.inconsistent); + target->mm_datasync_sign = MDBX_DATASIGN_WEAK; +#ifndef NDEBUG + /* debug: provoke failure to catch a violators, but don't touch mm_psize + * and mm_flags to allow readers catch actual pagesize. */ + uint8_t *provoke_begin = (uint8_t *)&target->mm_dbs[FREE_DBI].md_root; + uint8_t *provoke_end = (uint8_t *)&target->mm_datasync_sign; + memset(provoke_begin, 0xCC, provoke_end - provoke_begin); + mdbx_jitter4testing(false); +#endif + + /* LY: update info */ + target->mm_geo = pending->mm_geo; + target->mm_dbs[FREE_DBI] = pending->mm_dbs[FREE_DBI]; + target->mm_dbs[MAIN_DBI] = pending->mm_dbs[MAIN_DBI]; + target->mm_canary = pending->mm_canary; + target->mm_pages_retired = pending->mm_pages_retired; + mdbx_jitter4testing(true); + mdbx_flush_incoherent_cpu_writeback(); + + /* LY: 'commit' the meta */ + mdbx_meta_update_end(env, target, pending->mm_txnid_b.inconsistent); + mdbx_jitter4testing(true); + } else { + /* dangerous case (target == head), only mm_datasync_sign could + * me updated, check assertions once again */ + mdbx_ensure(env, mdbx_meta_txnid_stable(env, head) == + pending->mm_txnid_a.inconsistent && + !META_IS_STEADY(head) && META_IS_STEADY(pending)); + mdbx_ensure(env, memcmp(&head->mm_geo, &pending->mm_geo, + sizeof(head->mm_geo)) == 0); + mdbx_ensure(env, memcmp(&head->mm_dbs, &pending->mm_dbs, + sizeof(head->mm_dbs)) == 0); + mdbx_ensure(env, memcmp(&head->mm_canary, &pending->mm_canary, + sizeof(head->mm_canary)) == 0); + } + target->mm_datasync_sign = pending->mm_datasync_sign; + mdbx_flush_incoherent_cpu_writeback(); + mdbx_jitter4testing(true); + if ((flags & MDBX_SAFE_NOSYNC) == 0) { + /* sync meta-pages */ + const bool weak = (flags & (MDBX_MAPASYNC | MDBX_NOMETASYNC)) != 0; + rc = mdbx_msync(&env->me_dxb_mmap, 0, pgno_align2os_bytes(env, NUM_METAS), + weak); + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; + if (!weak) { +#if defined(__APPLE__) && \ + MDBX_OSX_SPEED_INSTEADOF_DURABILITY == MDBX_OSX_WANNA_DURABILITY + rc = likely(fcntl(env->me_lazy_fd, F_FULLFSYNC) != -1) ? MDBX_SUCCESS + : errno; + if (unlikely(rc != MDBX_SUCCESS)) + goto fail; +#endif /* MacOS */ + *env->me_meta_sync_txnid = pending->mm_txnid_a.low; + } + } + } else { + const MDBX_meta undo_meta = *target; + const mdbx_filehandle_t fd = (env->me_dsync_fd != INVALID_HANDLE_VALUE) + ? env->me_dsync_fd + : env->me_lazy_fd; + rc = mdbx_pwrite(fd, pending, sizeof(MDBX_meta), + (uint8_t *)target - env->me_map); + if (unlikely(rc != MDBX_SUCCESS)) { + undo: + mdbx_debug("%s", "write failed, disk error?"); + /* On a failure, the pagecache still contains the new data. + * Try write some old data back, to prevent it from being used. */ + mdbx_pwrite(fd, &undo_meta, sizeof(MDBX_meta), + (uint8_t *)target - env->me_map); + goto fail; + } + mdbx_flush_incoherent_mmap(target, sizeof(MDBX_meta), env->me_os_psize); + if ((flags & (MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC)) == 0) { + /* sync meta-pages */ + if (fd == env->me_lazy_fd) { + rc = mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); + if (rc != MDBX_SUCCESS) + goto undo; + } + *env->me_meta_sync_txnid = pending->mm_txnid_a.low; + } + } + + /* LY: shrink datafile if needed */ + if (unlikely(shrink)) { + mdbx_verbose("shrink to %" PRIaPGNO " pages (-%" PRIaPGNO ")", + pending->mm_geo.now, shrink); + rc = mdbx_mapresize(env, pending->mm_geo.next, pending->mm_geo.now, + pending->mm_geo.upper); + if (MDBX_IS_ERROR(rc)) + goto fail; + } + + if (likely(env->me_lck)) + /* toggle oldest refresh */ + env->me_lck->mti_readers_refresh_flag = false; + + return MDBX_SUCCESS; + +fail: + env->me_flags |= MDBX_FATAL_ERROR; + return rc; +} + +static void __cold mdbx_setup_pagesize(MDBX_env *env, const size_t pagesize) { + STATIC_ASSERT(PTRDIFF_MAX > MAX_MAPSIZE); + STATIC_ASSERT(MIN_PAGESIZE > sizeof(MDBX_page) + sizeof(MDBX_meta)); + mdbx_ensure(env, is_powerof2(pagesize)); + mdbx_ensure(env, pagesize >= MIN_PAGESIZE); + mdbx_ensure(env, pagesize <= MAX_PAGESIZE); + env->me_psize = (unsigned)pagesize; + + STATIC_ASSERT(MAX_GC1OVPAGE(MIN_PAGESIZE) > 4); + STATIC_ASSERT(MAX_GC1OVPAGE(MAX_PAGESIZE) < MDBX_DPL_TXNFULL); + const intptr_t maxgc_ov1page = (pagesize - PAGEHDRSZ) / sizeof(pgno_t) - 1; + mdbx_ensure(env, + maxgc_ov1page > 42 && maxgc_ov1page < (intptr_t)MDBX_DPL_TXNFULL); + env->me_maxgc_ov1page = (unsigned)maxgc_ov1page; + + STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) > sizeof(MDBX_db) + NODESIZE + 42); + STATIC_ASSERT(LEAF_NODEMAX(MAX_PAGESIZE) < UINT16_MAX); + STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) > BRANCH_NODEMAX(MIN_PAGESIZE)); + STATIC_ASSERT(BRANCH_NODEMAX(MAX_PAGESIZE) > NODESIZE + 42); + STATIC_ASSERT(BRANCH_NODEMAX(MAX_PAGESIZE) < UINT16_MAX); + const intptr_t branch_nodemax = BRANCH_NODEMAX(pagesize); + mdbx_ensure(env, branch_nodemax > 42 && branch_nodemax < (int)UINT16_MAX && + branch_nodemax % 2 == 0); + env->me_branch_nodemax = (unsigned)branch_nodemax; + env->me_maxkey_nd = (uint16_t)mdbx_limits_keysize_max(pagesize, 0); + env->me_maxkey_ds = (uint16_t)mdbx_limits_keysize_max(pagesize, MDBX_DUPSORT); + env->me_maxval_nd = (unsigned)mdbx_limits_valsize_max(pagesize, 0); + env->me_maxval_ds = (unsigned)mdbx_limits_valsize_max(pagesize, MDBX_DUPSORT); + mdbx_ensure(env, env->me_maxkey_nd == + env->me_branch_nodemax - NODESIZE - sizeof(pgno_t)); + mdbx_ensure(env, env->me_maxkey_ds == + env->me_branch_nodemax - NODESIZE - sizeof(MDBX_db)); + + env->me_psize2log = log2n(pagesize); + mdbx_assert(env, pgno2bytes(env, 1) == pagesize); + mdbx_assert(env, bytes2pgno(env, pagesize + pagesize) == 2); +} + +int __cold mdbx_env_create(MDBX_env **penv) { + MDBX_env *env = mdbx_calloc(1, sizeof(MDBX_env)); + if (unlikely(!env)) + return MDBX_ENOMEM; + + env->me_maxreaders = DEFAULT_READERS; + env->me_maxdbs = env->me_numdbs = CORE_DBS; + env->me_lazy_fd = INVALID_HANDLE_VALUE; + env->me_dsync_fd = INVALID_HANDLE_VALUE; + env->me_lfd = INVALID_HANDLE_VALUE; + env->me_pid = mdbx_getpid(); + + int rc; + const size_t os_psize = mdbx_syspagesize(); + if (unlikely(!is_powerof2(os_psize) || os_psize < MIN_PAGESIZE)) { + mdbx_error("unsuitable system pagesize %" PRIuPTR, os_psize); + rc = MDBX_INCOMPATIBLE; + goto bailout; + } + env->me_os_psize = (unsigned)os_psize; + mdbx_setup_pagesize(env, env->me_os_psize); + + rc = mdbx_fastmutex_init(&env->me_dbi_lock); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + +#if defined(_WIN32) || defined(_WIN64) + mdbx_srwlock_Init(&env->me_remap_guard); + InitializeCriticalSection(&env->me_windowsbug_lock); +#else + rc = mdbx_fastmutex_init(&env->me_remap_guard); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_fastmutex_destroy(&env->me_dbi_lock); + goto bailout; + } + +#if MDBX_LOCKING > MDBX_LOCKING_SYSV + rc = mdbx_ipclock_stub(&env->me_lckless_stub.wlock); +#endif /* MDBX_LOCKING */ + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_fastmutex_destroy(&env->me_remap_guard); + mdbx_fastmutex_destroy(&env->me_dbi_lock); + goto bailout; + } +#endif /* Windows */ + + VALGRIND_CREATE_MEMPOOL(env, 0, 0); + env->me_signature = MDBX_ME_SIGNATURE; + *penv = env; + return MDBX_SUCCESS; + +bailout: + mdbx_free(env); + *penv = nullptr; + return rc; +} + +__cold LIBMDBX_API int +mdbx_env_set_geometry(MDBX_env *env, intptr_t size_lower, intptr_t size_now, + intptr_t size_upper, intptr_t growth_step, + intptr_t shrink_threshold, intptr_t pagesize) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) + env->me_flags |= MDBX_FATAL_ERROR; +#endif /* MDBX_TXN_CHECKPID */ + + if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) + return MDBX_PANIC; + + const bool inside_txn = + (env->me_txn0 && env->me_txn0->mt_owner == mdbx_thread_self()); + +#if MDBX_DEBUG + if (growth_step < 0) + growth_step = 1; + if (shrink_threshold < 0) + shrink_threshold = 1; +#endif + + bool need_unlock = false; + int rc = MDBX_PROBLEM; + if (env->me_map) { + /* env already mapped */ + if (unlikely(env->me_flags & MDBX_RDONLY)) + return MDBX_EACCESS; + + if (!inside_txn) { + int err = mdbx_txn_lock(env, false); + if (unlikely(err != MDBX_SUCCESS)) + return err; + need_unlock = true; + } + MDBX_meta *head = mdbx_meta_head(env); + if (!inside_txn) { + env->me_txn0->mt_txnid = meta_txnid(env, head, false); + mdbx_find_oldest(env->me_txn0); + } + + /* get untouched params from DB */ + if (pagesize < 0) + pagesize = env->me_psize; + if (size_lower < 0) + size_lower = pgno2bytes(env, head->mm_geo.lower); + if (size_now < 0) + size_now = pgno2bytes(env, head->mm_geo.now); + if (size_upper < 0) + size_upper = pgno2bytes(env, head->mm_geo.upper); + if (growth_step < 0) + growth_step = pgno2bytes(env, head->mm_geo.grow); + if (shrink_threshold < 0) + shrink_threshold = pgno2bytes(env, head->mm_geo.shrink); + + if (pagesize != (intptr_t)env->me_psize) { + rc = MDBX_EINVAL; + goto bailout; + } + const size_t usedbytes = + pgno2bytes(env, mdbx_find_largest(env, head->mm_geo.next)); + if ((size_t)size_upper < usedbytes) { + rc = MDBX_MAP_FULL; + goto bailout; + } + if ((size_t)size_now < usedbytes) + size_now = usedbytes; + } else { + /* env NOT yet mapped */ + if (unlikely(inside_txn)) + return MDBX_PANIC; + + if (pagesize < 0) { + pagesize = env->me_os_psize; + if ((uintptr_t)pagesize > MAX_PAGESIZE) + pagesize = MAX_PAGESIZE; + mdbx_assert(env, (uintptr_t)pagesize >= MIN_PAGESIZE); + } + } + + if (pagesize == 0) + pagesize = MIN_PAGESIZE; + else if (pagesize == INTPTR_MAX) + pagesize = MAX_PAGESIZE; + + if (pagesize < (intptr_t)MIN_PAGESIZE || pagesize > (intptr_t)MAX_PAGESIZE || + !is_powerof2(pagesize)) { + rc = MDBX_EINVAL; + goto bailout; + } + + if (size_lower <= 0) { + size_lower = MIN_MAPSIZE; + if (MIN_MAPSIZE / pagesize < MIN_PAGENO) + size_lower = MIN_PAGENO * pagesize; + } + + if (size_now <= 0) { + size_now = DEFAULT_MAPSIZE; + if (size_now < size_lower) + size_now = size_lower; + if (size_upper >= size_lower && size_now > size_upper) + size_now = size_upper; + } + + if (size_upper <= 0) { + if ((size_t)size_now >= MAX_MAPSIZE / 2) + size_upper = MAX_MAPSIZE; + else if (MAX_MAPSIZE != MAX_MAPSIZE32 && + (size_t)size_now >= MAX_MAPSIZE32 / 2 && + (size_t)size_now <= MAX_MAPSIZE32 / 4 * 3) + size_upper = MAX_MAPSIZE32; + else { + size_upper = size_now + size_now; + if ((size_t)size_upper < DEFAULT_MAPSIZE * 2) + size_upper = DEFAULT_MAPSIZE * 2; + } + if ((size_t)size_upper / pagesize > MAX_PAGENO) + size_upper = pagesize * MAX_PAGENO; + } + + if (unlikely(size_lower < (intptr_t)MIN_MAPSIZE || size_lower > size_upper)) { + rc = MDBX_EINVAL; + goto bailout; + } + + if ((uint64_t)size_lower / pagesize < MIN_PAGENO) { + rc = MDBX_EINVAL; + goto bailout; + } + + if (unlikely((size_t)size_upper > MAX_MAPSIZE || + (uint64_t)size_upper / pagesize > MAX_PAGENO)) { + rc = MDBX_TOO_LARGE; + goto bailout; + } + + const size_t unit = + (env->me_os_psize > (size_t)pagesize) ? env->me_os_psize : pagesize; + size_lower = ceil_powerof2(size_lower, unit); + size_upper = ceil_powerof2(size_upper, unit); + size_now = ceil_powerof2(size_now, unit); + + /* LY: подбираем значение size_upper: + * - кратное размеру страницы + * - без нарушения MAX_MAPSIZE и MAX_PAGENO */ + while (unlikely((size_t)size_upper > MAX_MAPSIZE || + (uint64_t)size_upper / pagesize > MAX_PAGENO)) { + if ((size_t)size_upper < unit + MIN_MAPSIZE || + (size_t)size_upper < (size_t)pagesize * (MIN_PAGENO + 1)) { + /* паранойа на случай переполнения при невероятных значениях */ + rc = MDBX_EINVAL; + goto bailout; + } + size_upper -= unit; + if ((size_t)size_upper < (size_t)size_lower) + size_lower = size_upper; + } + mdbx_assert(env, (size_upper - size_lower) % env->me_os_psize == 0); + + if (size_now < size_lower) + size_now = size_lower; + if (size_now > size_upper) + size_now = size_upper; + + if (growth_step < 0) { + growth_step = ((size_t)(size_upper - size_lower)) / 42; + if (growth_step > size_lower) + growth_step = size_lower; + if (growth_step < 65536) + growth_step = 65536; + if ((size_t)growth_step > MEGABYTE * 16) + growth_step = MEGABYTE * 16; + } + if (growth_step == 0 && shrink_threshold > 0) + growth_step = 1; + growth_step = ceil_powerof2(growth_step, unit); + if (bytes2pgno(env, growth_step) > UINT16_MAX) + growth_step = pgno2bytes(env, UINT16_MAX); + + if (shrink_threshold < 0) + shrink_threshold = growth_step + growth_step; + shrink_threshold = ceil_powerof2(shrink_threshold, unit); + if (bytes2pgno(env, shrink_threshold) > UINT16_MAX) + shrink_threshold = pgno2bytes(env, UINT16_MAX); + + /* save user's geo-params for future open/create */ + env->me_dbgeo.lower = size_lower; + env->me_dbgeo.now = size_now; + env->me_dbgeo.upper = size_upper; + env->me_dbgeo.grow = growth_step; + env->me_dbgeo.shrink = shrink_threshold; + rc = MDBX_SUCCESS; + + mdbx_ensure(env, pagesize >= MIN_PAGESIZE); + mdbx_ensure(env, pagesize <= MAX_PAGESIZE); + mdbx_ensure(env, is_powerof2(pagesize)); + mdbx_ensure(env, is_powerof2(env->me_os_psize)); + + mdbx_ensure(env, env->me_dbgeo.lower >= MIN_MAPSIZE); + mdbx_ensure(env, env->me_dbgeo.lower / pagesize >= MIN_PAGENO); + mdbx_ensure(env, env->me_dbgeo.lower % pagesize == 0); + mdbx_ensure(env, env->me_dbgeo.lower % env->me_os_psize == 0); + + mdbx_ensure(env, env->me_dbgeo.upper <= MAX_MAPSIZE); + mdbx_ensure(env, env->me_dbgeo.upper / pagesize <= MAX_PAGENO); + mdbx_ensure(env, env->me_dbgeo.upper % pagesize == 0); + mdbx_ensure(env, env->me_dbgeo.upper % env->me_os_psize == 0); + + mdbx_ensure(env, env->me_dbgeo.now >= env->me_dbgeo.lower); + mdbx_ensure(env, env->me_dbgeo.now <= env->me_dbgeo.upper); + mdbx_ensure(env, env->me_dbgeo.now % pagesize == 0); + mdbx_ensure(env, env->me_dbgeo.now % env->me_os_psize == 0); + + mdbx_ensure(env, env->me_dbgeo.grow % pagesize == 0); + mdbx_ensure(env, env->me_dbgeo.grow % env->me_os_psize == 0); + mdbx_ensure(env, env->me_dbgeo.shrink % pagesize == 0); + mdbx_ensure(env, env->me_dbgeo.shrink % env->me_os_psize == 0); + + if (env->me_map) { + /* apply new params to opened environment */ + mdbx_ensure(env, pagesize == (intptr_t)env->me_psize); + MDBX_meta meta; + MDBX_meta *head = nullptr; + const mdbx_geo_t *current_geo; + if (inside_txn) { + current_geo = &env->me_txn->mt_geo; + } else { + head = mdbx_meta_head(env); + meta = *head; + current_geo = &meta.mm_geo; + } + + mdbx_geo_t new_geo; + new_geo.lower = bytes2pgno(env, env->me_dbgeo.lower); + new_geo.now = bytes2pgno(env, env->me_dbgeo.now); + new_geo.upper = bytes2pgno(env, env->me_dbgeo.upper); + new_geo.grow = (uint16_t)bytes2pgno(env, env->me_dbgeo.grow); + new_geo.shrink = (uint16_t)bytes2pgno(env, env->me_dbgeo.shrink); + new_geo.next = current_geo->next; + + mdbx_ensure(env, + pgno_align2os_bytes(env, new_geo.lower) == env->me_dbgeo.lower); + mdbx_ensure(env, + pgno_align2os_bytes(env, new_geo.upper) == env->me_dbgeo.upper); + mdbx_ensure(env, + pgno_align2os_bytes(env, new_geo.now) == env->me_dbgeo.now); + mdbx_ensure(env, + pgno_align2os_bytes(env, new_geo.grow) == env->me_dbgeo.grow); + mdbx_ensure(env, pgno_align2os_bytes(env, new_geo.shrink) == + env->me_dbgeo.shrink); + + mdbx_ensure(env, env->me_dbgeo.lower >= MIN_MAPSIZE); + mdbx_ensure(env, new_geo.lower >= MIN_PAGENO); + mdbx_ensure(env, env->me_dbgeo.upper <= MAX_MAPSIZE); + mdbx_ensure(env, new_geo.upper <= MAX_PAGENO); + mdbx_ensure(env, new_geo.now >= new_geo.next); + mdbx_ensure(env, new_geo.upper >= new_geo.now); + mdbx_ensure(env, new_geo.now >= new_geo.lower); + + if (memcmp(current_geo, &new_geo, sizeof(mdbx_geo_t)) != 0) { +#if defined(_WIN32) || defined(_WIN64) + /* Was DB shrinking disabled before and now it will be enabled? */ + if (new_geo.lower < new_geo.upper && new_geo.shrink && + !(current_geo->lower < current_geo->upper && current_geo->shrink)) { + if (!env->me_lck) { + rc = MDBX_EPERM; + goto bailout; + } + rc = mdbx_rdt_lock(env); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + /* Check if there are any reading threads that do not use the SRWL */ + const size_t CurrentTid = GetCurrentThreadId(); + const MDBX_reader *const begin = env->me_lck->mti_readers; + const MDBX_reader *const end = begin + env->me_lck->mti_numreaders; + for (const MDBX_reader *reader = begin; reader < end; ++reader) { + if (reader->mr_pid == env->me_pid && reader->mr_tid && + reader->mr_tid != CurrentTid) { + /* At least one thread may don't use SRWL */ + rc = MDBX_EPERM; + break; + } + } + + mdbx_rdt_unlock(env); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + } +#endif + + if (new_geo.now != current_geo->now || + new_geo.upper != current_geo->upper) { + rc = mdbx_mapresize(env, current_geo->next, new_geo.now, new_geo.upper); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + mdbx_assert(env, (head == nullptr) == inside_txn); + if (head) + head = /* base address could be changed */ mdbx_meta_head(env); + } + if (inside_txn) { + env->me_txn->mt_geo = new_geo; + env->me_txn->mt_flags |= MDBX_TXN_DIRTY; + } else { + mdbx_meta_set_txnid( + env, &meta, safe64_txnid_next(mdbx_meta_txnid_stable(env, head))); + rc = mdbx_sync_locked(env, env->me_flags, &meta); + } + } + } else if (pagesize != (intptr_t)env->me_psize) { + mdbx_setup_pagesize(env, pagesize); + } + +bailout: + if (need_unlock) + mdbx_txn_unlock(env); + return rc; +} + +int __cold mdbx_env_set_mapsize(MDBX_env *env, size_t size) { + return mdbx_env_set_geometry(env, size, size, size, -1, -1, -1); +} + +int __cold mdbx_env_set_maxdbs(MDBX_env *env, MDBX_dbi dbs) { + if (unlikely(dbs > MAX_DBI)) + return MDBX_EINVAL; + + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(env->me_map)) + return MDBX_EPERM; + + env->me_maxdbs = dbs + CORE_DBS; + return MDBX_SUCCESS; +} + +int __cold mdbx_env_set_maxreaders(MDBX_env *env, unsigned readers) { + if (unlikely(readers < 1 || readers > MDBX_READERS_LIMIT)) + return MDBX_EINVAL; + + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(env->me_map)) + return MDBX_EPERM; + + env->me_maxreaders = readers; + return MDBX_SUCCESS; +} + +int __cold mdbx_env_get_maxreaders(const MDBX_env *env, unsigned *readers) { + if (!env || !readers) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + *readers = env->me_maxreaders; + return MDBX_SUCCESS; +} + +/* Further setup required for opening an MDBX environment */ +static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) { + uint64_t filesize_before; + MDBX_meta meta; + int rc = MDBX_RESULT_FALSE; + int err = mdbx_read_header(env, &meta, &filesize_before, lck_rc); + if (unlikely(err != MDBX_SUCCESS)) { + if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE || err != MDBX_ENODATA || + (env->me_flags & MDBX_RDONLY) != 0) + return err; + + mdbx_debug("%s", "create new database"); + rc = /* new database */ MDBX_RESULT_TRUE; + + if (!env->me_dbgeo.now) { + /* set defaults if not configured */ + err = mdbx_env_set_geometry(env, 0, -1, DEFAULT_MAPSIZE, -1, -1, -1); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + + void *buffer = mdbx_calloc(NUM_METAS, env->me_psize); + if (!buffer) + return MDBX_ENOMEM; + + meta = *mdbx_init_metas(env, buffer); + err = mdbx_pwrite(env->me_lazy_fd, buffer, env->me_psize * NUM_METAS, 0); + mdbx_free(buffer); + if (unlikely(err != MDBX_SUCCESS)) + return err; + + err = mdbx_ftruncate(env->me_lazy_fd, filesize_before = env->me_dbgeo.now); + if (unlikely(err != MDBX_SUCCESS)) + return err; + +#ifndef NDEBUG /* just for checking */ + err = mdbx_read_header(env, &meta, &filesize_before, lck_rc); + if (unlikely(err != MDBX_SUCCESS)) + return err; +#endif + } + + mdbx_verbose("header: root %" PRIaPGNO "/%" PRIaPGNO ", geo %" PRIaPGNO + "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO + " +%u -%u, txn_id %" PRIaTXN ", %s", + meta.mm_dbs[MAIN_DBI].md_root, meta.mm_dbs[FREE_DBI].md_root, + meta.mm_geo.lower, meta.mm_geo.next, meta.mm_geo.now, + meta.mm_geo.upper, meta.mm_geo.grow, meta.mm_geo.shrink, + meta.mm_txnid_a.inconsistent, mdbx_durable_str(&meta)); + + mdbx_setup_pagesize(env, meta.mm_psize); + const size_t used_bytes = pgno2bytes(env, meta.mm_geo.next); + const size_t used_aligned2os_bytes = + ceil_powerof2(used_bytes, env->me_os_psize); + if ((env->me_flags & MDBX_RDONLY) /* readonly */ + || lck_rc != MDBX_RESULT_TRUE /* not exclusive */) { + /* use present params from db */ + const size_t pagesize = meta.mm_psize; + err = mdbx_env_set_geometry( + env, meta.mm_geo.lower * pagesize, meta.mm_geo.now * pagesize, + meta.mm_geo.upper * pagesize, meta.mm_geo.grow * pagesize, + meta.mm_geo.shrink * pagesize, meta.mm_psize); + if (unlikely(err != MDBX_SUCCESS)) { + mdbx_error("%s", "could not use present dbsize-params from db"); + return MDBX_INCOMPATIBLE; + } + } else if (env->me_dbgeo.now) { + /* silently growth to last used page */ + if (env->me_dbgeo.now < used_aligned2os_bytes) + env->me_dbgeo.now = used_aligned2os_bytes; + if (env->me_dbgeo.upper < used_aligned2os_bytes) + env->me_dbgeo.upper = used_aligned2os_bytes; + + /* apply preconfigured params, but only if substantial changes: + * - upper or lower limit changes + * - shrink threshold or growth step + * But ignore change just a 'now/current' size. */ + if (bytes_align2os_bytes(env, env->me_dbgeo.upper) != + pgno2bytes(env, meta.mm_geo.upper) || + bytes_align2os_bytes(env, env->me_dbgeo.lower) != + pgno2bytes(env, meta.mm_geo.lower) || + bytes_align2os_bytes(env, env->me_dbgeo.shrink) != + pgno2bytes(env, meta.mm_geo.shrink) || + bytes_align2os_bytes(env, env->me_dbgeo.grow) != + pgno2bytes(env, meta.mm_geo.grow)) { + + if (env->me_dbgeo.shrink && env->me_dbgeo.now > used_bytes) + /* pre-shrink if enabled */ + env->me_dbgeo.now = used_bytes + env->me_dbgeo.shrink - + used_bytes % env->me_dbgeo.shrink; + + err = mdbx_env_set_geometry(env, env->me_dbgeo.lower, env->me_dbgeo.now, + env->me_dbgeo.upper, env->me_dbgeo.grow, + env->me_dbgeo.shrink, meta.mm_psize); + if (unlikely(err != MDBX_SUCCESS)) { + mdbx_error("%s", "could not apply preconfigured dbsize-params to db"); + return MDBX_INCOMPATIBLE; + } + + /* update meta fields */ + meta.mm_geo.now = bytes2pgno(env, env->me_dbgeo.now); + meta.mm_geo.lower = bytes2pgno(env, env->me_dbgeo.lower); + meta.mm_geo.upper = bytes2pgno(env, env->me_dbgeo.upper); + meta.mm_geo.grow = (uint16_t)bytes2pgno(env, env->me_dbgeo.grow); + meta.mm_geo.shrink = (uint16_t)bytes2pgno(env, env->me_dbgeo.shrink); + + mdbx_verbose("amended: root %" PRIaPGNO "/%" PRIaPGNO ", geo %" PRIaPGNO + "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO + " +%u -%u, txn_id %" PRIaTXN ", %s", + meta.mm_dbs[MAIN_DBI].md_root, meta.mm_dbs[FREE_DBI].md_root, + meta.mm_geo.lower, meta.mm_geo.next, meta.mm_geo.now, + meta.mm_geo.upper, meta.mm_geo.grow, meta.mm_geo.shrink, + meta.mm_txnid_a.inconsistent, mdbx_durable_str(&meta)); + } else { + /* fetch back 'now/current' size, since it was ignored during comparison + * and may differ. */ + env->me_dbgeo.now = pgno_align2os_bytes(env, meta.mm_geo.now); + } + mdbx_ensure(env, meta.mm_geo.now >= meta.mm_geo.next); + } else { + /* geo-params are not pre-configured by user, + * get current values from the meta. */ + env->me_dbgeo.now = pgno2bytes(env, meta.mm_geo.now); + env->me_dbgeo.lower = pgno2bytes(env, meta.mm_geo.lower); + env->me_dbgeo.upper = pgno2bytes(env, meta.mm_geo.upper); + env->me_dbgeo.grow = pgno2bytes(env, meta.mm_geo.grow); + env->me_dbgeo.shrink = pgno2bytes(env, meta.mm_geo.shrink); + } + + mdbx_ensure(env, + pgno_align2os_bytes(env, meta.mm_geo.now) == env->me_dbgeo.now); + mdbx_ensure(env, env->me_dbgeo.now >= used_bytes); + if (unlikely(filesize_before != env->me_dbgeo.now)) { + if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE) { + mdbx_verbose("filesize mismatch (expect %" PRIuPTR "b/%" PRIaPGNO + "p, have %" PRIu64 "b/%" PRIaPGNO "p), " + "assume other process working", + env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now), + filesize_before, bytes2pgno(env, (size_t)filesize_before)); + } else { + mdbx_notice("filesize mismatch (expect %" PRIuSIZE "b/%" PRIaPGNO + "p, have %" PRIu64 "b/%" PRIaPGNO "p)", + env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now), + filesize_before, bytes2pgno(env, (size_t)filesize_before)); + if (filesize_before < used_bytes) { + mdbx_error("last-page beyond end-of-file (last %" PRIaPGNO + ", have %" PRIaPGNO ")", + meta.mm_geo.next, bytes2pgno(env, (size_t)filesize_before)); + return MDBX_CORRUPTED; + } + + if (env->me_flags & MDBX_RDONLY) { + if (filesize_before & (env->me_os_psize - 1)) { + mdbx_error("%s", "filesize should be rounded-up to system page"); + return MDBX_WANNA_RECOVERY; + } + mdbx_warning("%s", "ignore filesize mismatch in readonly-mode"); + } else { + mdbx_verbose("will resize datafile to %" PRIuSIZE " bytes, %" PRIaPGNO + " pages", + env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now)); + } + } + } + + mdbx_verbose("current boot-id %" PRIx64 "-%" PRIx64 " (%savailable)", + bootid.x, bootid.y, (bootid.x | bootid.y) ? "" : "not-"); + + err = mdbx_mmap(env->me_flags, &env->me_dxb_mmap, env->me_dbgeo.now, + env->me_dbgeo.upper, lck_rc ? MMAP_OPTION_TRUNCATE : 0); + if (unlikely(err != MDBX_SUCCESS)) + return err; + +#if defined(MADV_DONTDUMP) + err = madvise(env->me_map, env->me_dxb_mmap.limit, MADV_DONTDUMP) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#endif /* MADV_DONTDUMP */ +#if defined(MADV_DODUMP) + if (mdbx_runtime_flags & MDBX_DBG_DUMP) { + const size_t meta_length_aligned2os = pgno_align2os_bytes(env, NUM_METAS); + err = madvise(env->me_map, meta_length_aligned2os, MADV_DODUMP) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; + } +#endif /* MADV_DODUMP */ + +#ifdef MDBX_USE_VALGRIND + env->me_valgrind_handle = + VALGRIND_CREATE_BLOCK(env->me_map, env->me_dxb_mmap.limit, "mdbx"); +#endif /* MDBX_USE_VALGRIND */ + + mdbx_assert(env, used_bytes >= pgno2bytes(env, NUM_METAS) && + used_bytes <= env->me_dxb_mmap.limit); +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + VALGRIND_MAKE_MEM_NOACCESS(env->me_map + used_bytes, + env->me_dxb_mmap.limit - used_bytes); + ASAN_POISON_MEMORY_REGION(env->me_map + used_bytes, + env->me_dxb_mmap.limit - used_bytes); + env->me_poison_edge = bytes2pgno(env, env->me_dxb_mmap.limit); +#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ + + const unsigned meta_clash_mask = mdbx_meta_eq_mask(env); + if (meta_clash_mask) { + mdbx_error("meta-pages are clashed: mask 0x%d", meta_clash_mask); + return MDBX_CORRUPTED; + } + + while (1) { + MDBX_meta *const head = mdbx_meta_head(env); + const txnid_t head_txnid = mdbx_meta_txnid_fluid(env, head); + MDBX_meta *const steady = mdbx_meta_steady(env); + const txnid_t steady_txnid = mdbx_meta_txnid_fluid(env, steady); + if (head_txnid == steady_txnid) + break; + + if (lck_rc == /* lck exclusive */ MDBX_RESULT_TRUE) { + mdbx_assert(env, META_IS_STEADY(&meta) && !META_IS_STEADY(head)); + if (env->me_flags & MDBX_RDONLY) { + mdbx_error("rollback needed: (from head %" PRIaTXN + " to steady %" PRIaTXN "), but unable in read-only mode", + head_txnid, steady_txnid); + return MDBX_WANNA_RECOVERY /* LY: could not recovery/rollback */; + } + + if (meta_bootid_match(head)) { + MDBX_meta clone = *head; + uint64_t filesize = env->me_dbgeo.now; + err = mdbx_validate_meta( + env, &clone, &filesize, data_page(head), + bytes2pgno(env, (uint8_t *)data_page(head) - env->me_map), nullptr, + env->me_psize); + if (err == MDBX_SUCCESS) { + mdbx_notice("opening after an unclean shutdown, " + "but boot-id(%016" PRIx64 "-%016" PRIx64 ") is MATCH, " + "rollback NOT needed", + bootid.x, bootid.y); + meta = clone; + *env->me_unsynced_pages = meta.mm_geo.next; + break; + } + mdbx_notice("opening after an unclean shutdown, " + "but boot-id(%016" PRIx64 "-%016" PRIx64 ") is MATCH, " + "but last meta not valid, rollback needed", + bootid.x, bootid.y); + } + + const MDBX_meta *const meta0 = METAPAGE(env, 0); + const MDBX_meta *const meta1 = METAPAGE(env, 1); + const MDBX_meta *const meta2 = METAPAGE(env, 2); + txnid_t undo_txnid = 0 /* zero means undo is unneeded */; + while ( + (head != meta0 && mdbx_meta_txnid_fluid(env, meta0) == undo_txnid) || + (head != meta1 && mdbx_meta_txnid_fluid(env, meta1) == undo_txnid) || + (head != meta2 && mdbx_meta_txnid_fluid(env, meta2) == undo_txnid)) + undo_txnid = safe64_txnid_next(undo_txnid); + if (unlikely(undo_txnid >= steady_txnid)) { + mdbx_fatal("rollback failed: no suitable txnid (0,1,2) < %" PRIaTXN, + steady_txnid); + return MDBX_PANIC /* LY: could not recovery/rollback */; + } + + /* LY: rollback weak checkpoint */ + mdbx_trace("rollback: from %" PRIaTXN ", to %" PRIaTXN " as %" PRIaTXN, + head_txnid, steady_txnid, undo_txnid); + mdbx_ensure(env, head_txnid == mdbx_meta_txnid_stable(env, head)); + + if (env->me_flags & MDBX_WRITEMAP) { + /* It is possible to update txnid without safe64_write(), + * since DB opened exclusive for now */ + head->mm_txnid_a.inconsistent = undo_txnid; + head->mm_datasync_sign = MDBX_DATASIGN_WEAK; + head->mm_txnid_b.inconsistent = undo_txnid; + const size_t offset = (uint8_t *)data_page(head) - env->me_dxb_mmap.dxb; + const size_t paged_offset = floor_powerof2(offset, env->me_os_psize); + const size_t paged_length = ceil_powerof2( + env->me_psize + offset - paged_offset, env->me_os_psize); + err = mdbx_msync(&env->me_dxb_mmap, paged_offset, paged_length, false); + } else { + MDBX_meta rollback = *head; + mdbx_meta_set_txnid(env, &rollback, undo_txnid); + rollback.mm_datasync_sign = MDBX_DATASIGN_WEAK; + err = mdbx_pwrite(env->me_lazy_fd, &rollback, sizeof(MDBX_meta), + (uint8_t *)head - (uint8_t *)env->me_map); + } + if (err) { + mdbx_error("error %d rollback from %" PRIaTXN ", to %" PRIaTXN + " as %" PRIaTXN, + err, head_txnid, steady_txnid, undo_txnid); + return err; + } + + mdbx_flush_incoherent_mmap(env->me_map, pgno2bytes(env, NUM_METAS), + env->me_os_psize); + mdbx_ensure(env, undo_txnid == mdbx_meta_txnid_fluid(env, head)); + mdbx_ensure(env, 0 == mdbx_meta_eq_mask(env)); + continue; + } + + if (!env->me_lck) { + /* LY: without-lck (read-only) mode, so it is imposible that other + * process made weak checkpoint. */ + mdbx_error("%s", "without-lck, unable recovery/rollback"); + return MDBX_WANNA_RECOVERY; + } + + /* LY: assume just have a collision with other running process, + * or someone make a weak checkpoint */ + mdbx_verbose("%s", "assume collision or online weak checkpoint"); + break; + } + + const MDBX_meta *head = mdbx_meta_head(env); + if (lck_rc == /* lck exclusive */ MDBX_RESULT_TRUE) { + /* re-check size after mmap */ + if ((env->me_dxb_mmap.current & (env->me_os_psize - 1)) != 0 || + env->me_dxb_mmap.current < used_bytes) { + mdbx_error("unacceptable/unexpected datafile size %" PRIuPTR, + env->me_dxb_mmap.current); + return MDBX_PROBLEM; + } + if (env->me_dxb_mmap.current != env->me_dbgeo.now && + (env->me_flags & MDBX_RDONLY) == 0) { + meta.mm_geo.now = bytes2pgno(env, env->me_dxb_mmap.current); + mdbx_verbose("update meta-geo to filesize %" PRIuPTR " bytes, %" PRIaPGNO + " pages", + env->me_dxb_mmap.current, meta.mm_geo.now); + } + + if (memcmp(&meta.mm_geo, &head->mm_geo, sizeof(meta.mm_geo))) { + const txnid_t txnid = mdbx_meta_txnid_stable(env, head); + const txnid_t next_txnid = safe64_txnid_next(txnid); + mdbx_verbose("updating meta.geo: " + "from l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO + "/s%u-g%u (txn#%" PRIaTXN "), " + "to l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO + "/s%u-g%u (txn#%" PRIaTXN ")", + head->mm_geo.lower, head->mm_geo.now, head->mm_geo.upper, + head->mm_geo.shrink, head->mm_geo.grow, txnid, + meta.mm_geo.lower, meta.mm_geo.now, meta.mm_geo.upper, + meta.mm_geo.shrink, meta.mm_geo.grow, next_txnid); + + mdbx_ensure(env, mdbx_meta_eq(env, &meta, head)); + mdbx_meta_set_txnid(env, &meta, next_txnid); + err = mdbx_sync_locked(env, env->me_flags | MDBX_SHRINK_ALLOWED, &meta); + if (err) { + mdbx_error("error %d, while updating meta.geo: " + "from l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO + "/s%u-g%u (txn#%" PRIaTXN "), " + "to l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO + "/s%u-g%u (txn#%" PRIaTXN ")", + err, head->mm_geo.lower, head->mm_geo.now, + head->mm_geo.upper, head->mm_geo.shrink, head->mm_geo.grow, + txnid, meta.mm_geo.lower, meta.mm_geo.now, meta.mm_geo.upper, + meta.mm_geo.shrink, meta.mm_geo.grow, next_txnid); + return err; + } + } + } + + *env->me_discarded_tail = bytes2pgno(env, used_aligned2os_bytes); + if (used_aligned2os_bytes < env->me_dxb_mmap.current) { +#if defined(MADV_REMOVE) + if (lck_rc && (env->me_flags & MDBX_WRITEMAP) != 0) { + mdbx_notice("open-MADV_%s %u..%u", "REMOVE", *env->me_discarded_tail, + bytes2pgno(env, env->me_dxb_mmap.current)); + err = + madvise(env->me_map + used_aligned2os_bytes, + env->me_dxb_mmap.current - used_aligned2os_bytes, MADV_REMOVE) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; + } +#endif /* MADV_REMOVE */ +#if defined(MADV_DONTNEED) + mdbx_notice("open-MADV_%s %u..%u", "DONTNEED", *env->me_discarded_tail, + bytes2pgno(env, env->me_dxb_mmap.current)); + err = + madvise(env->me_map + used_aligned2os_bytes, + env->me_dxb_mmap.current - used_aligned2os_bytes, MADV_DONTNEED) + ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#elif defined(POSIX_MADV_DONTNEED) + err = ignore_enosys(posix_madvise( + env->me_map + used_aligned2os_bytes, + env->me_dxb_mmap.current - used_aligned2os_bytes, POSIX_MADV_DONTNEED)); + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#elif defined(POSIX_FADV_DONTNEED) + err = ignore_enosys(posix_fadvise( + env->me_lazy_fd, used_aligned2os_bytes, + env->me_dxb_mmap.current - used_aligned2os_bytes, POSIX_FADV_DONTNEED)); + if (unlikely(MDBX_IS_ERROR(err))) + return err; +#endif /* MADV_DONTNEED */ + } + + const bool readahead = (env->me_flags & MDBX_NORDAHEAD) == 0 && + mdbx_is_readahead_reasonable(env->me_dxb_mmap.current, + 0) == MDBX_RESULT_TRUE; + err = mdbx_set_readahead(env, 0, used_bytes, readahead); + if (err != MDBX_SUCCESS && lck_rc == /* lck exclusive */ MDBX_RESULT_TRUE) + return err; + + return rc; +} + +/******************************************************************************/ + +/* Open and/or initialize the lock region for the environment. */ +static int __cold mdbx_setup_lck(MDBX_env *env, char *lck_pathname, + mode_t mode) { + mdbx_assert(env, env->me_lazy_fd != INVALID_HANDLE_VALUE); + mdbx_assert(env, env->me_lfd == INVALID_HANDLE_VALUE); + + int err = mdbx_openfile(MDBX_OPEN_LCK, env, lck_pathname, &env->me_lfd, mode); + if (err != MDBX_SUCCESS) { + if (!(err == MDBX_ENOFILE && (env->me_flags & MDBX_EXCLUSIVE)) && + !((err == MDBX_EROFS || err == MDBX_EACCESS || err == MDBX_EPERM) && + (env->me_flags & MDBX_RDONLY))) + return err; + + /* ensure the file system is read-only */ + err = mdbx_check_fs_rdonly(env->me_lazy_fd, lck_pathname, err); + if (err != MDBX_SUCCESS) + return err; + + /* LY: without-lck mode (e.g. exclusive or on read-only filesystem) */ + /* beginning of a locked section ---------------------------------------- */ + lcklist_lock(); + mdbx_assert(env, env->me_lcklist_next == nullptr); + env->me_lfd = INVALID_HANDLE_VALUE; + const int rc = mdbx_lck_seize(env); + if (MDBX_IS_ERROR(rc)) { + /* Calling lcklist_detach_locked() is required to restore POSIX-filelock + * and this job will be done by mdbx_env_close0(). */ + lcklist_unlock(); + return rc; + } + /* insert into inprocess lck-list */ + env->me_lcklist_next = inprocess_lcklist_head; + inprocess_lcklist_head = env; + lcklist_unlock(); + /* end of a locked section ---------------------------------------------- */ + + env->me_oldest = &env->me_lckless_stub.oldest; + env->me_sync_timestamp = &env->me_lckless_stub.sync_timestamp; + env->me_autosync_period = &env->me_lckless_stub.autosync_period; + env->me_unsynced_pages = &env->me_lckless_stub.autosync_pending; + env->me_autosync_threshold = &env->me_lckless_stub.autosync_threshold; + env->me_discarded_tail = &env->me_lckless_stub.discarded_tail; + env->me_meta_sync_txnid = &env->me_lckless_stub.meta_sync_txnid; + env->me_maxreaders = UINT_MAX; +#if MDBX_LOCKING > 0 + env->me_wlock = &env->me_lckless_stub.wlock; +#endif /* MDBX_LOCKING > 0 */ + mdbx_debug("lck-setup:%s%s%s", " lck-less", + (env->me_flags & MDBX_RDONLY) ? " readonly" : "", + (rc == MDBX_RESULT_TRUE) ? " exclusive" : " cooperative"); + return rc; + } + + /* beginning of a locked section ------------------------------------------ */ + lcklist_lock(); + mdbx_assert(env, env->me_lcklist_next == nullptr); + + /* Try to get exclusive lock. If we succeed, then + * nobody is using the lock region and we should initialize it. */ + err = mdbx_lck_seize(env); + if (MDBX_IS_ERROR(err)) { + bailout: + /* Calling lcklist_detach_locked() is required to restore POSIX-filelock + * and this job will be done by mdbx_env_close0(). */ + lcklist_unlock(); + return err; + } + + MDBX_env *inprocess_neighbor = nullptr; + if (err == MDBX_RESULT_TRUE) { + err = uniq_check(&env->me_lck_mmap, &inprocess_neighbor); + if (MDBX_IS_ERROR(err)) + goto bailout; + if (inprocess_neighbor && + ((mdbx_runtime_flags & MDBX_DBG_LEGACY_MULTIOPEN) == 0 || + (inprocess_neighbor->me_flags & MDBX_EXCLUSIVE) != 0)) { + err = MDBX_BUSY; + goto bailout; + } + } + const int lck_seize_rc = err; + + mdbx_debug("lck-setup:%s%s%s", " with-lck", + (env->me_flags & MDBX_RDONLY) ? " readonly" : "", + (lck_seize_rc == MDBX_RESULT_TRUE) ? " exclusive" + : " cooperative"); + + uint64_t size = 0; + err = mdbx_filesize(env->me_lfd, &size); + if (unlikely(err != MDBX_SUCCESS)) + goto bailout; + + if (lck_seize_rc == MDBX_RESULT_TRUE) { + size = ceil_powerof2(env->me_maxreaders * sizeof(MDBX_reader) + + sizeof(MDBX_lockinfo), + env->me_os_psize); + mdbx_jitter4testing(false); + } else { + if (env->me_flags & MDBX_EXCLUSIVE) { + err = MDBX_BUSY; + goto bailout; + } + if (size > INT_MAX || (size & (env->me_os_psize - 1)) != 0 || + size < env->me_os_psize) { + mdbx_error("lck-file has invalid size %" PRIu64 " bytes", size); + err = MDBX_PROBLEM; + goto bailout; + } + } + + const size_t maxreaders = + ((size_t)size - sizeof(MDBX_lockinfo)) / sizeof(MDBX_reader); + if (size > 65536 || maxreaders < 2 || maxreaders > MDBX_READERS_LIMIT) { + mdbx_error("lck-size too big (up to %" PRIuPTR " readers)", maxreaders); + err = MDBX_PROBLEM; + goto bailout; + } + env->me_maxreaders = (unsigned)maxreaders; + + err = mdbx_mmap((env->me_flags & MDBX_EXCLUSIVE) | MDBX_WRITEMAP, &env->me_lck_mmap, (size_t)size, (size_t)size, + lck_seize_rc ? MMAP_OPTION_TRUNCATE | MMAP_OPTION_SEMAPHORE + : MMAP_OPTION_SEMAPHORE); + if (unlikely(err != MDBX_SUCCESS)) + goto bailout; + +#ifdef MADV_DODUMP + err = madvise(env->me_lck, size, MADV_DODUMP) ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + goto bailout; +#endif /* MADV_DODUMP */ + +#ifdef MADV_WILLNEED + err = madvise(env->me_lck, size, MADV_WILLNEED) ? ignore_enosys(errno) + : MDBX_SUCCESS; + if (unlikely(MDBX_IS_ERROR(err))) + goto bailout; +#endif /* MADV_WILLNEED */ + + struct MDBX_lockinfo *const lck = env->me_lck; + if (lck_seize_rc == MDBX_RESULT_TRUE) { + /* LY: exlcusive mode, check and reset lck content */ + memset(lck, 0, (size_t)size); + mdbx_jitter4testing(false); + lck->mti_magic_and_version = MDBX_LOCK_MAGIC; + lck->mti_os_and_format = MDBX_LOCK_FORMAT; + } else { + if (lck->mti_magic_and_version != MDBX_LOCK_MAGIC) { + mdbx_error("%s", "lock region has invalid magic/version"); + err = ((lck->mti_magic_and_version >> 8) != MDBX_MAGIC) + ? MDBX_INVALID + : MDBX_VERSION_MISMATCH; + goto bailout; + } + if (lck->mti_os_and_format != MDBX_LOCK_FORMAT) { + mdbx_error("lock region has os/format 0x%" PRIx32 ", expected 0x%" PRIx32, + lck->mti_os_and_format, MDBX_LOCK_FORMAT); + err = MDBX_VERSION_MISMATCH; + goto bailout; + } + } + + err = mdbx_lck_init(env, inprocess_neighbor, lck_seize_rc); + if (MDBX_IS_ERROR(err)) + goto bailout; + + mdbx_ensure(env, env->me_lcklist_next == nullptr); + /* insert into inprocess lck-list */ + env->me_lcklist_next = inprocess_lcklist_head; + inprocess_lcklist_head = env; + lcklist_unlock(); + /* end of a locked section ------------------------------------------------ */ + + mdbx_assert(env, !MDBX_IS_ERROR(lck_seize_rc)); + env->me_oldest = &lck->mti_oldest_reader; + env->me_sync_timestamp = &lck->mti_sync_timestamp; + env->me_autosync_period = &lck->mti_autosync_period; + env->me_unsynced_pages = &lck->mti_unsynced_pages; + env->me_autosync_threshold = &lck->mti_autosync_threshold; + env->me_discarded_tail = &lck->mti_discarded_tail; + env->me_meta_sync_txnid = &lck->mti_meta_sync_txnid; +#if MDBX_LOCKING > 0 + env->me_wlock = &lck->mti_wlock; +#endif /* MDBX_LOCKING > 0 */ + return lck_seize_rc; +} + +__cold int mdbx_is_readahead_reasonable(size_t volume, intptr_t redundancy) { + if (volume <= 1024 * 1024 * 4ul) + return MDBX_RESULT_TRUE; + + const intptr_t pagesize = mdbx_syspagesize(); + if (unlikely(pagesize < MIN_PAGESIZE || !is_powerof2(pagesize))) + return MDBX_INCOMPATIBLE; + +#if defined(_WIN32) || defined(_WIN64) + MEMORYSTATUSEX info; + memset(&info, 0, sizeof(info)); + info.dwLength = sizeof(info); + if (!GlobalMemoryStatusEx(&info)) + return GetLastError(); +#endif + const int log2page = log2n(pagesize); + +#if defined(_WIN32) || defined(_WIN64) + const intptr_t total_ram_pages = (intptr_t)(info.ullTotalPhys >> log2page); +#elif defined(_SC_PHYS_PAGES) + const intptr_t total_ram_pages = sysconf(_SC_PHYS_PAGES); + if (total_ram_pages == -1) + return errno; +#elif defined(_SC_AIX_REALMEM) + const intptr_t total_ram_Kb = sysconf(_SC_AIX_REALMEM); + if (total_ram_Kb == -1) + return errno; + const intptr_t total_ram_pages = (total_ram_Kb << 10) >> log2page; +#elif defined(HW_USERMEM) || defined(HW_PHYSMEM64) || defined(HW_MEMSIZE) || \ + defined(HW_PHYSMEM) + size_t ram, len = sizeof(ram); + static const int mib[] = { + CTL_HW, +#if defined(HW_USERMEM) + HW_USERMEM +#elif defined(HW_PHYSMEM64) + HW_PHYSMEM64 +#elif defined(HW_MEMSIZE) + HW_MEMSIZE +#else + HW_PHYSMEM +#endif + }; + if (sysctl( +#ifdef SYSCTL_LEGACY_NONCONST_MIB + (int *) +#endif + mib, + ARRAY_LENGTH(mib), &ram, &len, NULL, 0) != 0) + return errno; + if (len != sizeof(ram)) + return MDBX_ENOSYS; + const intptr_t total_ram_pages = (intptr_t)(ram >> log2page); +#else +#error "FIXME: Get User-accessible or physical RAM" +#endif + if (total_ram_pages < 1) + return MDBX_ENOSYS; + + const intptr_t volume_pages = (volume + pagesize - 1) >> log2page; + const intptr_t redundancy_pages = + (redundancy < 0) ? -(intptr_t)((-redundancy + pagesize - 1) >> log2page) + : (intptr_t)(redundancy + pagesize - 1) >> log2page; + if (volume_pages >= total_ram_pages || + volume_pages + redundancy_pages >= total_ram_pages) + return MDBX_RESULT_FALSE; + +#if defined(_WIN32) || defined(_WIN64) + const intptr_t avail_ram_pages = (intptr_t)(info.ullAvailPhys >> log2page); +#elif defined(_SC_AVPHYS_PAGES) + const intptr_t avail_ram_pages = sysconf(_SC_AVPHYS_PAGES); + if (avail_ram_pages == -1) + return errno; +#elif defined(__MACH__) + mach_msg_type_number_t count = HOST_VM_INFO_COUNT; + vm_statistics_data_t vmstat; + mach_port_t mport = mach_host_self(); + kern_return_t kerr = host_statistics(mach_host_self(), HOST_VM_INFO, + (host_info_t)&vmstat, &count); + mach_port_deallocate(mach_task_self(), mport); + if (unlikely(kerr != KERN_SUCCESS)) + return MDBX_ENOSYS; + const intptr_t avail_ram_pages = vmstat.free_count; +#elif defined(VM_TOTAL) || defined(VM_METER) + struct vmtotal info; + size_t len = sizeof(info); + static const int mib[] = { + CTL_VM, +#if defined(VM_TOTAL) + VM_TOTAL +#elif defined(VM_METER) + VM_METER +#endif + }; + if (sysctl( +#ifdef SYSCTL_LEGACY_NONCONST_MIB + (int *) +#endif + mib, + ARRAY_LENGTH(mib), &info, &len, NULL, 0) != 0) + return errno; + if (len != sizeof(info)) + return MDBX_ENOSYS; + const intptr_t avail_ram_pages = info.t_free; +#else +#error "FIXME: Get Available RAM" +#endif + if (avail_ram_pages < 1) + return MDBX_ENOSYS; + + return (volume_pages + redundancy_pages >= avail_ram_pages) + ? MDBX_RESULT_FALSE + : MDBX_RESULT_TRUE; +} + +/* Only a subset of the mdbx_env flags can be changed + * at runtime. Changing other flags requires closing the + * environment and re-opening it with the new flags. */ +#define CHANGEABLE \ + (MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | MDBX_MAPASYNC | MDBX_NOMEMINIT | \ + MDBX_COALESCE | MDBX_PAGEPERTURB | MDBX_ACCEDE) +#define CHANGELESS \ + (MDBX_NOSUBDIR | MDBX_RDONLY | MDBX_WRITEMAP | MDBX_NOTLS | MDBX_NORDAHEAD | \ + MDBX_LIFORECLAIM | MDBX_EXCLUSIVE) + +#if VALID_FLAGS & PERSISTENT_FLAGS & (CHANGEABLE | CHANGELESS) +#error "Persistent DB flags & env flags overlap, but both go in mm_flags" +#endif + +int __cold mdbx_env_open(MDBX_env *env, const char *pathname, unsigned flags, + mode_t mode) { + if (unlikely(!env || !pathname)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (flags & ~(CHANGEABLE | CHANGELESS)) + return MDBX_EINVAL; + + if (env->me_lazy_fd != INVALID_HANDLE_VALUE || + (env->me_flags & MDBX_ENV_ACTIVE) != 0) + return MDBX_EPERM; + + size_t len_full, len = strlen(pathname); + if (flags & MDBX_NOSUBDIR) { + len_full = len + sizeof(MDBX_LOCK_SUFFIX) + len + 1; + } else { + len_full = len + sizeof(MDBX_LOCKNAME) + len + sizeof(MDBX_DATANAME); + } + char *lck_pathname = mdbx_malloc(len_full); + if (!lck_pathname) + return MDBX_ENOMEM; + + char *dxb_pathname; + if (flags & MDBX_NOSUBDIR) { + dxb_pathname = lck_pathname + len + sizeof(MDBX_LOCK_SUFFIX); + sprintf(lck_pathname, "%s" MDBX_LOCK_SUFFIX, pathname); + strcpy(dxb_pathname, pathname); + } else { + dxb_pathname = lck_pathname + len + sizeof(MDBX_LOCKNAME); + sprintf(lck_pathname, "%s" MDBX_LOCKNAME, pathname); + sprintf(dxb_pathname, "%s" MDBX_DATANAME, pathname); + } + + int rc = MDBX_SUCCESS; + flags |= env->me_flags; + if (flags & MDBX_RDONLY) { + /* LY: silently ignore irrelevant flags when + * we're only getting read access */ + flags &= + ~(MDBX_WRITEMAP | MDBX_MAPASYNC | MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | + MDBX_COALESCE | MDBX_LIFORECLAIM | MDBX_NOMEMINIT | MDBX_ACCEDE); + } else { +#if MDBX_MMAP_INCOHERENT_FILE_WRITE + /* Temporary `workaround` for OpenBSD kernel's flaw. + * See https://github.com/erthink/libmdbx/issues/67 */ + if ((flags & MDBX_WRITEMAP) == 0) { + if (flags & MDBX_ACCEDE) + flags |= MDBX_WRITEMAP; + else { + mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, + "System (i.e. OpenBSD) requires MDBX_WRITEMAP because " + "of an internal flaw(s) in a file/buffer/page cache.\n"); + rc = 42 /* ENOPROTOOPT */; + goto bailout; + } + } +#endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ + env->me_dirtylist = mdbx_calloc(MDBX_DPL_TXNFULL + 1, sizeof(MDBX_DP)); + if (!env->me_dirtylist) + rc = MDBX_ENOMEM; + } + + const uint32_t saved_me_flags = env->me_flags; + env->me_flags = (flags & ~MDBX_FATAL_ERROR) | MDBX_ENV_ACTIVE; + if (rc) + goto bailout; + + env->me_path = mdbx_strdup(pathname); + env->me_dbxs = mdbx_calloc(env->me_maxdbs, sizeof(MDBX_dbx)); + env->me_dbflags = mdbx_calloc(env->me_maxdbs, sizeof(env->me_dbflags[0])); + env->me_dbiseqs = mdbx_calloc(env->me_maxdbs, sizeof(env->me_dbiseqs[0])); + if (!(env->me_dbxs && env->me_path && env->me_dbflags && env->me_dbiseqs)) { + rc = MDBX_ENOMEM; + goto bailout; + } + env->me_dbxs[FREE_DBI].md_cmp = + mdbx_cmp_int_align4; /* aligned MDBX_INTEGERKEY */ + + if ((flags & (MDBX_RDONLY | MDBX_NOSUBDIR)) == 0 && mode != 0) { +#if defined(_WIN32) || defined(_WIN64) + const size_t wlen = mbstowcs(nullptr, pathname, INT_MAX); + if (wlen < 1 || wlen > /* MAX_PATH */ INT16_MAX) + return ERROR_INVALID_NAME; + wchar_t *const pathnameW = _alloca((wlen + 1) * sizeof(wchar_t)); + if (wlen != mbstowcs(pathnameW, pathname, wlen + 1)) { + rc = ERROR_INVALID_NAME; + goto bailout; + } + if (!CreateDirectoryW(pathnameW, nullptr)) { + rc = GetLastError(); + if (rc != ERROR_ALREADY_EXISTS) + goto bailout; + } +#else + const mode_t dir_mode = + (/* inherit read/write permissions for group and others */ mode & + (S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) | + /* always add read/write/search for owner */ S_IRWXU | + ((mode & S_IRGRP) ? /* +search if readable by group */ S_IXGRP : 0) | + ((mode & S_IROTH) ? /* +search if readable by others */ S_IXOTH : 0); + if (mkdir(pathname, dir_mode)) { + rc = errno; + if (rc != EEXIST) + goto bailout; + } +#endif + } + + rc = mdbx_openfile(F_ISSET(flags, MDBX_RDONLY) ? MDBX_OPEN_DXB_READ + : MDBX_OPEN_DXB_LAZY, + env, dxb_pathname, &env->me_lazy_fd, mode); + if (rc != MDBX_SUCCESS) + goto bailout; + + mdbx_assert(env, env->me_dsync_fd == INVALID_HANDLE_VALUE); + if ((flags & (MDBX_RDONLY | MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC)) == 0) { + rc = mdbx_openfile(MDBX_OPEN_DXB_DSYNC, env, dxb_pathname, + &env->me_dsync_fd, 0); + mdbx_ensure(env, (rc != MDBX_SUCCESS) == + (env->me_dsync_fd == INVALID_HANDLE_VALUE)); + } + +#if MDBX_LOCKING == MDBX_LOCKING_SYSV + env->me_sysv_ipc.key = ftok(dxb_pathname, 42); + if (env->me_sysv_ipc.key == -1) { + rc = errno; + goto bailout; + } +#endif /* MDBX_LOCKING */ + +#if !(defined(_WIN32) || defined(_WIN64)) + if (mode == 0) { + struct stat st; + if (fstat(env->me_lazy_fd, &st)) { + rc = errno; + goto bailout; + } + mode = st.st_mode; + } +#endif /* !Windows */ + + const int lck_rc = mdbx_setup_lck(env, lck_pathname, mode); + if (MDBX_IS_ERROR(lck_rc)) { + rc = lck_rc; + goto bailout; + } + + const unsigned rigorous_flags = + MDBX_WRITEMAP | MDBX_SAFE_NOSYNC | MDBX_MAPASYNC; + const unsigned mode_flags = rigorous_flags | MDBX_NOMETASYNC | + MDBX_LIFORECLAIM | MDBX_COALESCE | MDBX_NORDAHEAD; + + if (env->me_lck && lck_rc != MDBX_RESULT_TRUE && + (env->me_flags & MDBX_RDONLY) == 0) { + while (env->me_lck->mti_envmode == MDBX_RDONLY) { + if (atomic_cas32(&env->me_lck->mti_envmode, MDBX_RDONLY, + env->me_flags & mode_flags)) + break; + atomic_yield(); + } + + if (env->me_flags & MDBX_ACCEDE) { + /* pickup current mode-flags, including MDBX_LIFORECLAIM | + * MDBX_COALESCE | MDBX_NORDAHEAD */ + const unsigned diff = + (env->me_lck->mti_envmode ^ env->me_flags) & mode_flags; + mdbx_notice("accede mode-flags: 0x%X, 0x%X -> 0x%X", diff, env->me_flags, + env->me_flags ^ diff); + env->me_flags ^= diff; + } + + if ((env->me_lck->mti_envmode ^ env->me_flags) & rigorous_flags) { + mdbx_error("%s", "current mode/flags incompatible with requested"); + rc = MDBX_INCOMPATIBLE; + goto bailout; + } + } + + const int dxb_rc = mdbx_setup_dxb(env, lck_rc); + if (MDBX_IS_ERROR(dxb_rc)) { + rc = dxb_rc; + goto bailout; + } + + mdbx_debug("opened dbenv %p", (void *)env); + if (env->me_lck) { + if (lck_rc == MDBX_RESULT_TRUE) { + env->me_lck->mti_envmode = env->me_flags & (mode_flags | MDBX_RDONLY); + rc = mdbx_lck_downgrade(env); + mdbx_debug("lck-downgrade-%s: rc %i", + (env->me_flags & MDBX_EXCLUSIVE) ? "partial" : "full", rc); + if (rc != MDBX_SUCCESS) + goto bailout; + } else { + rc = mdbx_reader_check0(env, false, NULL); + if (MDBX_IS_ERROR(rc)) + goto bailout; + } + + if ((env->me_flags & MDBX_NOTLS) == 0) { + rc = mdbx_rthc_alloc(&env->me_txkey, &env->me_lck->mti_readers[0], + &env->me_lck->mti_readers[env->me_maxreaders]); + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + env->me_flags |= MDBX_ENV_TXKEY; + } + } + + if ((flags & MDBX_RDONLY) == 0) { + const size_t tsize = sizeof(MDBX_txn), + size = tsize + env->me_maxdbs * + (sizeof(MDBX_db) + sizeof(MDBX_cursor *) + + sizeof(unsigned) + 1); + rc = mdbx_memalign_alloc( + env->me_os_psize, + env->me_psize * (1 /* page buffer */ + 1 /* page killer bufer */), + &env->me_pbuf); + if (rc == MDBX_SUCCESS) { + memset(env->me_pbuf, -1, env->me_psize * 2); + MDBX_txn *txn = mdbx_calloc(1, size); + if (txn) { + txn->mt_dbs = (MDBX_db *)((char *)txn + tsize); + txn->mt_cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs); + txn->mt_dbiseqs = (unsigned *)(txn->mt_cursors + env->me_maxdbs); + txn->mt_dbflags = (uint8_t *)(txn->mt_dbiseqs + env->me_maxdbs); + txn->mt_env = env; + txn->mt_dbxs = env->me_dbxs; + txn->mt_flags = MDBX_TXN_FINISHED; + env->me_txn0 = txn; + txn->tw.retired_pages = mdbx_pnl_alloc(MDBX_PNL_INITIAL); + txn->tw.reclaimed_pglist = mdbx_pnl_alloc(MDBX_PNL_INITIAL); + if (!txn->tw.retired_pages || !txn->tw.reclaimed_pglist) + rc = MDBX_ENOMEM; + } else + rc = MDBX_ENOMEM; + } + } + +#if MDBX_DEBUG + if (rc == MDBX_SUCCESS) { + MDBX_meta *meta = mdbx_meta_head(env); + MDBX_db *db = &meta->mm_dbs[MAIN_DBI]; + + mdbx_debug("opened database version %u, pagesize %u", + (uint8_t)meta->mm_magic_and_version, env->me_psize); + mdbx_debug("using meta page %" PRIaPGNO ", txn %" PRIaTXN, + data_page(meta)->mp_pgno, mdbx_meta_txnid_fluid(env, meta)); + mdbx_debug("depth: %u", db->md_depth); + mdbx_debug("entries: %" PRIu64, db->md_entries); + mdbx_debug("branch pages: %" PRIaPGNO, db->md_branch_pages); + mdbx_debug("leaf pages: %" PRIaPGNO, db->md_leaf_pages); + mdbx_debug("overflow pages: %" PRIaPGNO, db->md_overflow_pages); + mdbx_debug("root: %" PRIaPGNO, db->md_root); + mdbx_debug("schema_altered: %" PRIaTXN, db->md_mod_txnid); + } +#endif + +bailout: + if (rc != MDBX_SUCCESS) { + rc = mdbx_env_close0(env) ? MDBX_PANIC : rc; + env->me_flags = saved_me_flags | MDBX_FATAL_ERROR; + } else { +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + mdbx_txn_valgrind(env, nullptr); +#endif + } + mdbx_free(lck_pathname); + return rc; +} + +/* Destroy resources from mdbx_env_open(), clear our readers & DBIs */ +static int __cold mdbx_env_close0(MDBX_env *env) { + if (!(env->me_flags & MDBX_ENV_ACTIVE)) { + mdbx_ensure(env, env->me_lcklist_next == nullptr); + return MDBX_SUCCESS; + } + + env->me_signature = 0; + env->me_flags &= ~MDBX_ENV_ACTIVE; + env->me_oldest = nullptr; + env->me_sync_timestamp = nullptr; + env->me_autosync_period = nullptr; + env->me_unsynced_pages = nullptr; + env->me_autosync_threshold = nullptr; + env->me_discarded_tail = nullptr; + env->me_meta_sync_txnid = nullptr; + if (env->me_flags & MDBX_ENV_TXKEY) + mdbx_rthc_remove(env->me_txkey); + + lcklist_lock(); + const int rc = lcklist_detach_locked(env); + lcklist_unlock(); + + if (env->me_map) { + mdbx_munmap(&env->me_dxb_mmap); +#ifdef MDBX_USE_VALGRIND + VALGRIND_DISCARD(env->me_valgrind_handle); + env->me_valgrind_handle = -1; +#endif + } + + if (env->me_dsync_fd != INVALID_HANDLE_VALUE) { + (void)mdbx_closefile(env->me_dsync_fd); + env->me_dsync_fd = INVALID_HANDLE_VALUE; + } + + if (env->me_lazy_fd != INVALID_HANDLE_VALUE) { + (void)mdbx_closefile(env->me_lazy_fd); + env->me_lazy_fd = INVALID_HANDLE_VALUE; + } + + if (env->me_lck) + mdbx_munmap(&env->me_lck_mmap); + + if (env->me_lfd != INVALID_HANDLE_VALUE) { + (void)mdbx_closefile(env->me_lfd); + env->me_lfd = INVALID_HANDLE_VALUE; + } + + if (env->me_dbxs) { + for (unsigned i = env->me_numdbs; --i >= CORE_DBS;) + mdbx_free(env->me_dbxs[i].md_name.iov_base); + mdbx_free(env->me_dbxs); + } + mdbx_memalign_free(env->me_pbuf); + mdbx_free(env->me_dbiseqs); + mdbx_free(env->me_dbflags); + mdbx_free(env->me_path); + mdbx_free(env->me_dirtylist); + if (env->me_txn0) { + mdbx_txl_free(env->me_txn0->tw.lifo_reclaimed); + mdbx_pnl_free(env->me_txn0->tw.retired_pages); + mdbx_pnl_free(env->me_txn0->tw.spill_pages); + mdbx_pnl_free(env->me_txn0->tw.reclaimed_pglist); + mdbx_free(env->me_txn0); + } + env->me_flags = 0; + return rc; +} + +int __cold mdbx_env_close_ex(MDBX_env *env, int dont_sync) { + MDBX_page *dp; + int rc = MDBX_SUCCESS; + + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + +#if MDBX_TXN_CHECKPID || !(defined(_WIN32) || defined(_WIN64)) + /* Check the PID even if MDBX_TXN_CHECKPID=0 on non-Windows + * platforms (i.e. where fork() is available). + * This is required to legitimize a call after fork() + * from a child process, that should be allowed to free resources. */ + if (unlikely(env->me_pid != mdbx_getpid())) + env->me_flags |= MDBX_FATAL_ERROR; +#endif /* MDBX_TXN_CHECKPID */ + + if ((env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR)) == 0 && env->me_txn0) { + if (env->me_txn0->mt_owner && env->me_txn0->mt_owner != mdbx_thread_self()) + return MDBX_BUSY; + } else + dont_sync = true; + + if (!atomic_cas32(&env->me_signature, MDBX_ME_SIGNATURE, 0)) + return MDBX_EBADSIGN; + + if (!dont_sync) { +#if defined(_WIN32) || defined(_WIN64) + /* On windows, without blocking is impossible to determine whether another + * process is running a writing transaction or not. + * Because in the "owner died" condition kernel don't release + * file lock immediately. */ + rc = mdbx_env_sync_internal(env, true, false); + rc = (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc; +#else + struct stat st; + if (unlikely(fstat(env->me_lazy_fd, &st))) + rc = errno; + else if (st.st_nlink > 0 /* don't sync deleted files */) { + rc = mdbx_env_sync_internal(env, true, true); + rc = (rc == MDBX_BUSY || rc == EAGAIN || rc == EACCES || rc == EBUSY || + rc == EWOULDBLOCK || rc == MDBX_RESULT_TRUE) + ? MDBX_SUCCESS + : rc; + } +#endif + } + + rc = mdbx_env_close0(env) ? MDBX_PANIC : rc; + mdbx_ensure(env, mdbx_fastmutex_destroy(&env->me_dbi_lock) == MDBX_SUCCESS); +#if defined(_WIN32) || defined(_WIN64) + /* me_remap_guard don't have destructor (Slim Reader/Writer Lock) */ + DeleteCriticalSection(&env->me_windowsbug_lock); +#else + mdbx_ensure(env, + mdbx_fastmutex_destroy(&env->me_remap_guard) == MDBX_SUCCESS); +#endif /* Windows */ + +#if MDBX_LOCKING > MDBX_LOCKING_SYSV + mdbx_ensure(env, mdbx_ipclock_destroy(&env->me_lckless_stub.wlock) == 0); +#endif /* MDBX_LOCKING */ + + while ((dp = env->me_dpages) != NULL) { + ASAN_UNPOISON_MEMORY_REGION(&dp->mp_next, sizeof(dp->mp_next)); + VALGRIND_MAKE_MEM_DEFINED(&dp->mp_next, sizeof(dp->mp_next)); + env->me_dpages = dp->mp_next; + mdbx_free(dp); + } + VALGRIND_DESTROY_MEMPOOL(env); + mdbx_ensure(env, env->me_lcklist_next == nullptr); + env->me_pid = 0; + mdbx_free(env); + + return rc; +} + +__cold int mdbx_env_close(MDBX_env *env) { + return mdbx_env_close_ex(env, false); +} + +/* Compare two items pointing at aligned unsigned int's. */ +static int __hot mdbx_cmp_int_align4(const MDBX_val *a, const MDBX_val *b) { + mdbx_assert(NULL, a->iov_len == b->iov_len); + switch (a->iov_len) { + case 4: + return CMP2INT(unaligned_peek_u32(4, a->iov_base), + unaligned_peek_u32(4, b->iov_base)); + case 8: + return CMP2INT(unaligned_peek_u64(4, a->iov_base), + unaligned_peek_u64(4, b->iov_base)); + default: + mdbx_assert_fail(NULL, "invalid size for INTEGERKEY/INTEGERDUP", __func__, + __LINE__); + return 0; + } +} + +/* Compare two items pointing at 2-byte aligned unsigned int's. */ +static int __hot mdbx_cmp_int_align2(const MDBX_val *a, const MDBX_val *b) { + mdbx_assert(NULL, a->iov_len == b->iov_len); + switch (a->iov_len) { + case 4: + return CMP2INT(unaligned_peek_u32(2, a->iov_base), + unaligned_peek_u32(2, b->iov_base)); + case 8: + return CMP2INT(unaligned_peek_u64(2, a->iov_base), + unaligned_peek_u64(2, b->iov_base)); + default: + mdbx_assert_fail(NULL, "invalid size for INTEGERKEY/INTEGERDUP", __func__, + __LINE__); + return 0; + } +} + +/* Compare two items pointing at unsigneds of unknown alignment. + * + * This is also set as MDBX_INTEGERDUP|MDBX_DUPFIXED's MDBX_dbx.md_dcmp. */ +static int __hot mdbx_cmp_int_unaligned(const MDBX_val *a, const MDBX_val *b) { + mdbx_assert(NULL, a->iov_len == b->iov_len); + switch (a->iov_len) { + case 4: + return CMP2INT(unaligned_peek_u32(1, a->iov_base), + unaligned_peek_u32(1, b->iov_base)); + case 8: + return CMP2INT(unaligned_peek_u64(1, a->iov_base), + unaligned_peek_u64(1, b->iov_base)); + default: + mdbx_assert_fail(NULL, "invalid size for INTEGERKEY/INTEGERDUP", __func__, + __LINE__); + return 0; + } +} + +/* Compare two items lexically */ +static int __hot mdbx_cmp_memn(const MDBX_val *a, const MDBX_val *b) { + if (a->iov_len == b->iov_len) + return memcmp(a->iov_base, b->iov_base, a->iov_len); + + const int diff_len = (a->iov_len < b->iov_len) ? -1 : 1; + const size_t shortest = (a->iov_len < b->iov_len) ? a->iov_len : b->iov_len; + int diff_data = memcmp(a->iov_base, b->iov_base, shortest); + return likely(diff_data) ? diff_data : diff_len; +} + +/* Compare two items in reverse byte order */ +static int __hot mdbx_cmp_memnr(const MDBX_val *a, const MDBX_val *b) { + const uint8_t *pa = (const uint8_t *)a->iov_base + a->iov_len; + const uint8_t *pb = (const uint8_t *)b->iov_base + b->iov_len; + const size_t shortest = (a->iov_len < b->iov_len) ? a->iov_len : b->iov_len; + + const uint8_t *const end = pa - shortest; + while (pa != end) { + int diff = *--pa - *--pb; + if (likely(diff)) + return diff; + } + return CMP2INT(a->iov_len, b->iov_len); +} + +/* Search for key within a page, using binary search. + * Returns the smallest entry larger or equal to the key. + * If exactp is non-null, stores whether the found entry was an exact match + * in *exactp (1 or 0). + * Updates the cursor index with the index of the found entry. + * If no entry larger or equal to the key is found, returns NULL. */ +static MDBX_node *__hot mdbx_node_search(MDBX_cursor *mc, MDBX_val *key, + int *exactp) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + const int nkeys = page_numkeys(mp); + DKBUF; + + mdbx_debug("searching %u keys in %s %spage %" PRIaPGNO, nkeys, + IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "", + mp->mp_pgno); + + int low = IS_LEAF(mp) ? 0 : 1; + int high = nkeys - 1; + *exactp = 0; + if (unlikely(high < low)) { + mc->mc_ki[mc->mc_top] = 0; + return NULL; + } + + int rc = 0, i = 0; + MDBX_cmp_func *cmp = mc->mc_dbx->md_cmp; + MDBX_val nodekey; + if (unlikely(IS_LEAF2(mp))) { + mdbx_cassert(mc, mp->mp_leaf2_ksize == mc->mc_db->md_xsize); + nodekey.iov_len = mp->mp_leaf2_ksize; + do { + i = (low + high) >> 1; + nodekey.iov_base = page_leaf2key(mp, i, nodekey.iov_len); + mdbx_cassert(mc, (char *)mp + mc->mc_txn->mt_env->me_psize >= + (char *)nodekey.iov_base + nodekey.iov_len); + rc = cmp(key, &nodekey); + mdbx_debug("found leaf index %u [%s], rc = %i", i, DKEY(&nodekey), rc); + if (unlikely(rc == 0)) { + *exactp = 1; + break; + } + low = (rc < 0) ? low : i + 1; + high = (rc < 0) ? i - 1 : high; + } while (likely(low <= high)); + + /* Found entry is less than the key. */ + /* Skip to get the smallest entry larger than key. */ + i += rc > 0; + + /* store the key index */ + mc->mc_ki[mc->mc_top] = (indx_t)i; + return (i < nkeys) + ? /* fake for LEAF2 */ (MDBX_node *)(intptr_t)-1 + : /* There is no entry larger or equal to the key. */ NULL; + } + + if (cmp == mdbx_cmp_int_align2 && IS_BRANCH(mp)) + /* Branch pages have no data, so if using integer keys, + * alignment is guaranteed. Use faster mdbx_cmp_int_align4(). */ + cmp = mdbx_cmp_int_align4; + + MDBX_node *node; + do { + i = (low + high) >> 1; + + node = page_node(mp, i); + nodekey.iov_len = node_ks(node); + nodekey.iov_base = node_key(node); + mdbx_cassert(mc, (char *)mp + mc->mc_txn->mt_env->me_psize >= + (char *)nodekey.iov_base + nodekey.iov_len); + + rc = cmp(key, &nodekey); + if (IS_LEAF(mp)) + mdbx_debug("found leaf index %u [%s], rc = %i", i, DKEY(&nodekey), rc); + else + mdbx_debug("found branch index %u [%s -> %" PRIaPGNO "], rc = %i", i, + DKEY(&nodekey), node_pgno(node), rc); + if (unlikely(rc == 0)) { + *exactp = 1; + break; + } + low = (rc < 0) ? low : i + 1; + high = (rc < 0) ? i - 1 : high; + } while (likely(low <= high)); + + /* Found entry is less than the key. */ + /* Skip to get the smallest entry larger than key. */ + i += rc > 0; + + /* store the key index */ + mc->mc_ki[mc->mc_top] = (indx_t)i; + return (i < nkeys) ? page_node(mp, i) + : /* There is no entry larger or equal to the key. */ NULL; +} + +#if 0 /* unused for now */ +static void mdbx_cursor_adjust(MDBX_cursor *mc, func) { + MDBX_cursor *m2; + + for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2 = m2->mc_next) { + if (m2->mc_pg[m2->mc_top] == mc->mc_pg[mc->mc_top]) { + func(mc, m2); + } + } +} +#endif + +/* Pop a page off the top of the cursor's stack. */ +static void mdbx_cursor_pop(MDBX_cursor *mc) { + if (mc->mc_snum) { + mdbx_debug("popped page %" PRIaPGNO " off db %d cursor %p", + mc->mc_pg[mc->mc_top]->mp_pgno, DDBI(mc), (void *)mc); + + mc->mc_snum--; + if (mc->mc_snum) { + mc->mc_top--; + } else { + mc->mc_flags &= ~C_INITIALIZED; + } + } +} + +/* Push a page onto the top of the cursor's stack. + * Set MDBX_TXN_ERROR on failure. */ +static int mdbx_cursor_push(MDBX_cursor *mc, MDBX_page *mp) { + mdbx_debug("pushing page %" PRIaPGNO " on db %d cursor %p", mp->mp_pgno, + DDBI(mc), (void *)mc); + + if (unlikely(mc->mc_snum >= CURSOR_STACK)) { + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_CURSOR_FULL; + } + + mdbx_cassert(mc, mc->mc_snum < UINT16_MAX); + mc->mc_top = mc->mc_snum++; + mc->mc_pg[mc->mc_top] = mp; + mc->mc_ki[mc->mc_top] = 0; + + return MDBX_SUCCESS; +} + +/* Find the address of the page corresponding to a given page number. + * Set MDBX_TXN_ERROR on failure. + * + * [in] mc the cursor accessing the page. + * [in] pgno the page number for the page to retrieve. + * [out] ret address of a pointer where the page's address will be + * stored. + * [out] lvl dirtylist inheritance level of found page. 1=current txn, + * 0=mapped page. + * + * Returns 0 on success, non-zero on failure. */ +__hot static int mdbx_page_get(MDBX_cursor *mc, pgno_t pgno, MDBX_page **ret, + int *lvl) { + MDBX_txn *txn = mc->mc_txn; + if (unlikely(pgno >= txn->mt_next_pgno)) { + mdbx_debug("page %" PRIaPGNO " not found", pgno); + goto corrupted; + } + + MDBX_env *const env = txn->mt_env; + MDBX_page *p = NULL; + int level; + mdbx_assert(env, ((txn->mt_flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); + const uint16_t illegal_bits = (txn->mt_flags & MDBX_RDONLY) + ? P_LOOSE | P_SUBP | P_META | P_DIRTY + : P_LOOSE | P_SUBP | P_META; + const uint64_t txnid = txn->mt_txnid; + if (unlikely((txn->mt_flags & (MDBX_RDONLY | MDBX_WRITEMAP)) == 0)) { + level = 1; + do { + /* Spilled pages were dirtied in this txn and flushed + * because the dirty list got full. Bring this page + * back in from the map (but don't unspill it here, + * leave that unless page_touch happens again). */ + if (txn->tw.spill_pages && mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1)) + goto spilled; + p = mdbx_dpl_find(txn->tw.dirtylist, pgno); + if (p) + goto dirty; + level++; + } while ((txn = txn->mt_parent) != NULL); + } + level = 0; + +spilled: + p = pgno2page(env, pgno); + +dirty: + if (unlikely(p->mp_pgno != pgno)) { + mdbx_error("mismatch pgno %" PRIaPGNO " (actual) != %" PRIaPGNO + " (expected)", + p->mp_pgno, pgno); + goto corrupted; + } + + if (unlikely((p->mp_flags & illegal_bits) != 0 || + p->mp_txnid > ((p->mp_flags & P_DIRTY) ? UINT64_MAX : txnid))) { + mdbx_error("invalid page's flags (0x%x) or txnid %" PRIaTXN + " > (actual) %" PRIaTXN " (expected)", + p->mp_flags, p->mp_txnid, mc->mc_txn->mt_txnid); + goto corrupted; + } + + if (unlikely((p->mp_upper < p->mp_lower || + ((p->mp_lower | p->mp_upper) & 1) != 0 || + PAGEHDRSZ + p->mp_upper > env->me_psize) && + !IS_OVERFLOW(p))) { + mdbx_error("invalid page lower(%u)/upper(%u), pg-limit %u", p->mp_lower, + p->mp_upper, page_space(env)); + goto corrupted; + } + + if (mdbx_audit_enabled()) { + int err = mdbx_page_check(env, p, true); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + + *(lvl ? lvl : &level) = level; + *ret = p; + return MDBX_SUCCESS; + +corrupted: + txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_CORRUPTED; +} + +/* Finish mdbx_page_search() / mdbx_page_search_lowest(). + * The cursor is at the root page, set up the rest of it. */ +__hot static int mdbx_page_search_root(MDBX_cursor *mc, MDBX_val *key, + int flags) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + int rc; + DKBUF; + + while (IS_BRANCH(mp)) { + MDBX_node *node; + int i; + + mdbx_debug("branch page %" PRIaPGNO " has %u keys", mp->mp_pgno, + page_numkeys(mp)); + /* Don't assert on branch pages in the GC. We can get here + * while in the process of rebalancing a GC branch page; we must + * let that proceed. ITS#8336 */ + mdbx_cassert(mc, !mc->mc_dbi || page_numkeys(mp) > 1); + mdbx_debug("found index 0 to page %" PRIaPGNO, node_pgno(page_node(mp, 0))); + + if (flags & (MDBX_PS_FIRST | MDBX_PS_LAST)) { + i = 0; + if (flags & MDBX_PS_LAST) { + i = page_numkeys(mp) - 1; + /* if already init'd, see if we're already in right place */ + if (mc->mc_flags & C_INITIALIZED) { + if (mc->mc_ki[mc->mc_top] == i) { + mc->mc_top = mc->mc_snum++; + mp = mc->mc_pg[mc->mc_top]; + goto ready; + } + } + } + } else { + int exact; + node = mdbx_node_search(mc, key, &exact); + if (node == NULL) + i = page_numkeys(mp) - 1; + else { + i = mc->mc_ki[mc->mc_top]; + if (!exact) { + mdbx_cassert(mc, i > 0); + i--; + } + } + mdbx_debug("following index %u for key [%s]", i, DKEY(key)); + } + + mdbx_cassert(mc, i < (int)page_numkeys(mp)); + node = page_node(mp, i); + + if (unlikely((rc = mdbx_page_get(mc, node_pgno(node), &mp, NULL)) != 0)) + return rc; + + mc->mc_ki[mc->mc_top] = (indx_t)i; + if (unlikely(rc = mdbx_cursor_push(mc, mp))) + return rc; + + ready: + if (flags & MDBX_PS_MODIFY) { + if (unlikely((rc = mdbx_page_touch(mc)) != 0)) + return rc; + mp = mc->mc_pg[mc->mc_top]; + } + } + + if (unlikely(!IS_LEAF(mp))) { + mdbx_debug("internal error, index points to a page with 0x%02x flags!?", + mp->mp_flags); + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_CORRUPTED; + } + + mdbx_debug("found leaf page %" PRIaPGNO " for key [%s]", mp->mp_pgno, + DKEY(key)); + mc->mc_flags |= C_INITIALIZED; + mc->mc_flags &= ~C_EOF; + + return MDBX_SUCCESS; +} + +static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) { + MDBX_cursor mc; + if (unlikely(TXN_DBI_CHANGED(txn, dbi))) + return MDBX_BAD_DBI; + int rc = mdbx_cursor_init(&mc, txn, MAIN_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_page_search(&mc, &txn->mt_dbxs[dbi].md_name, 0); + if (unlikely(rc != MDBX_SUCCESS)) + return (rc == MDBX_NOTFOUND) ? MDBX_BAD_DBI : rc; + + MDBX_val data; + int exact = 0; + MDBX_node *node = mdbx_node_search(&mc, &txn->mt_dbxs[dbi].md_name, &exact); + if (unlikely(!exact)) + return MDBX_BAD_DBI; + if (unlikely((node_flags(node) & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA)) + return MDBX_INCOMPATIBLE; /* not a named DB */ + rc = mdbx_node_read(&mc, node, &data); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(data.iov_len < sizeof(MDBX_db))) + return MDBX_INCOMPATIBLE; /* not a named DB */ + + uint16_t md_flags = UNALIGNED_PEEK_16(data.iov_base, MDBX_db, md_flags); + /* The txn may not know this DBI, or another process may + * have dropped and recreated the DB with other flags. */ + if (unlikely((txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS) != md_flags)) + return MDBX_INCOMPATIBLE; + + memcpy(&txn->mt_dbs[dbi], data.iov_base, sizeof(MDBX_db)); + txn->mt_dbflags[dbi] &= ~DB_STALE; + return MDBX_SUCCESS; +} + +/* Search for the lowest key under the current branch page. + * This just bypasses a numkeys check in the current page + * before calling mdbx_page_search_root(), because the callers + * are all in situations where the current page is known to + * be underfilled. */ +__hot static int mdbx_page_search_lowest(MDBX_cursor *mc) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + mdbx_cassert(mc, IS_BRANCH(mp)); + MDBX_node *node = page_node(mp, 0); + int rc; + + if (unlikely((rc = mdbx_page_get(mc, node_pgno(node), &mp, NULL)) != 0)) + return rc; + + mc->mc_ki[mc->mc_top] = 0; + if (unlikely(rc = mdbx_cursor_push(mc, mp))) + return rc; + return mdbx_page_search_root(mc, NULL, MDBX_PS_FIRST); +} + +/* Search for the page a given key should be in. + * Push it and its parent pages on the cursor stack. + * + * [in,out] mc the cursor for this operation. + * [in] key the key to search for, or NULL for first/last page. + * [in] flags If MDBX_PS_MODIFY is set, visited pages in the DB + * are touched (updated with new page numbers). + * If MDBX_PS_FIRST or MDBX_PS_LAST is set, find first or last + * leaf. + * This is used by mdbx_cursor_first() and mdbx_cursor_last(). + * If MDBX_PS_ROOTONLY set, just fetch root node, no further + * lookups. + * + * Returns 0 on success, non-zero on failure. */ +__hot static int mdbx_page_search(MDBX_cursor *mc, MDBX_val *key, int flags) { + int rc; + pgno_t root; + + /* Make sure the txn is still viable, then find the root from + * the txn's db table and set it as the root of the cursor's stack. */ + if (unlikely(mc->mc_txn->mt_flags & MDBX_TXN_BLOCKED)) { + mdbx_debug("%s", "transaction has failed, must abort"); + return MDBX_BAD_TXN; + } + + /* Make sure we're using an up-to-date root */ + if (unlikely(*mc->mc_dbflag & DB_STALE)) { + rc = mdbx_fetch_sdb(mc->mc_txn, mc->mc_dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + root = mc->mc_db->md_root; + + if (unlikely(root == P_INVALID)) { /* Tree is empty. */ + mdbx_debug("%s", "tree is empty"); + return MDBX_NOTFOUND; + } + + mdbx_cassert(mc, root >= NUM_METAS); + if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root) + if (unlikely((rc = mdbx_page_get(mc, root, &mc->mc_pg[0], NULL)) != 0)) + return rc; + + mc->mc_snum = 1; + mc->mc_top = 0; + + mdbx_debug("db %d root page %" PRIaPGNO " has flags 0x%X", DDBI(mc), root, + mc->mc_pg[0]->mp_flags); + + if (flags & MDBX_PS_MODIFY) { + if (unlikely(rc = mdbx_page_touch(mc))) + return rc; + } + + if (flags & MDBX_PS_ROOTONLY) + return MDBX_SUCCESS; + + return mdbx_page_search_root(mc, key, flags); +} + +/* Return the data associated with a given node. + * + * [in] mc The cursor for this operation. + * [in] leaf The node being read. + * [out] data Updated to point to the node's data. + * + * Returns 0 on success, non-zero on failure. */ +static __always_inline int mdbx_node_read(MDBX_cursor *mc, MDBX_node *node, + MDBX_val *data) { + data->iov_len = node_ds(node); + data->iov_base = node_data(node); + if (unlikely(F_ISSET(node_flags(node), F_BIGDATA))) { + /* Read overflow data. */ + MDBX_page *omp; /* overflow page */ + int rc = mdbx_page_get(mc, node_largedata_pgno(node), &omp, NULL); + if (unlikely((rc != MDBX_SUCCESS))) { + mdbx_debug("read overflow page %" PRIaPGNO " failed", + node_largedata_pgno(node)); + return rc; + } + data->iov_base = page_data(omp); + } + return MDBX_SUCCESS; +} + +int mdbx_get(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, MDBX_val *data) { + DKBUF; + mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key)); + + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!key || !data)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + MDBX_cursor_couple cx; + rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + int exact = 0; + return mdbx_cursor_set(&cx.outer, (MDBX_val *)key, data, MDBX_SET, &exact); +} + +int mdbx_get_nearest(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, + MDBX_val *data) { + DKBUF; + mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key)); + + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!key || !data)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED)) + return MDBX_BAD_TXN; + + MDBX_cursor_couple cx; + rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + MDBX_val save_data = *data; + int exact = 0; + rc = mdbx_cursor_set(&cx.outer, key, data, MDBX_SET_RANGE, &exact); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (exact && (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) != 0) { + *data = save_data; + exact = 0; + rc = mdbx_cursor_set(&cx.outer, key, data, MDBX_GET_BOTH_RANGE, &exact); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + return exact ? MDBX_SUCCESS : MDBX_RESULT_TRUE; +} + +int mdbx_get_ex(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, + size_t *values_count) { + DKBUF; + mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key)); + + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!key || !data)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + MDBX_cursor_couple cx; + rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + int exact = 0; + rc = mdbx_cursor_set(&cx.outer, key, data, MDBX_SET_KEY, &exact); + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc == MDBX_NOTFOUND && values_count) + *values_count = 0; + return rc; + } + + if (values_count) { + *values_count = 1; + if (cx.outer.mc_xcursor != NULL) { + MDBX_node *node = page_node(cx.outer.mc_pg[cx.outer.mc_top], + cx.outer.mc_ki[cx.outer.mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + mdbx_tassert(txn, cx.outer.mc_xcursor == &cx.inner && + (cx.inner.mx_cursor.mc_flags & C_INITIALIZED)); + *values_count = + (sizeof(*values_count) >= sizeof(cx.inner.mx_db.md_entries) || + cx.inner.mx_db.md_entries <= PTRDIFF_MAX) + ? (size_t)cx.inner.mx_db.md_entries + : PTRDIFF_MAX; + } + } + } + return MDBX_SUCCESS; +} + +/* Find a sibling for a page. + * Replaces the page at the top of the cursor's stack with the specified + * sibling, if one exists. + * + * [in] mc The cursor for this operation. + * [in] move_right Non-zero if the right sibling is requested, + * otherwise the left sibling. + * + * Returns 0 on success, non-zero on failure. */ +static int mdbx_cursor_sibling(MDBX_cursor *mc, int move_right) { + int rc; + MDBX_node *indx; + MDBX_page *mp; + + if (unlikely(mc->mc_snum < 2)) + return MDBX_NOTFOUND; /* root has no siblings */ + + mdbx_cursor_pop(mc); + mdbx_debug("parent page is page %" PRIaPGNO ", index %u", + mc->mc_pg[mc->mc_top]->mp_pgno, mc->mc_ki[mc->mc_top]); + + if (move_right + ? (mc->mc_ki[mc->mc_top] + 1u >= page_numkeys(mc->mc_pg[mc->mc_top])) + : (mc->mc_ki[mc->mc_top] == 0)) { + mdbx_debug("no more keys left, moving to %s sibling", + move_right ? "right" : "left"); + if (unlikely((rc = mdbx_cursor_sibling(mc, move_right)) != MDBX_SUCCESS)) { + /* undo cursor_pop before returning */ + mc->mc_top++; + mc->mc_snum++; + return rc; + } + } else { + if (move_right) + mc->mc_ki[mc->mc_top]++; + else + mc->mc_ki[mc->mc_top]--; + mdbx_debug("just moving to %s index key %u", move_right ? "right" : "left", + mc->mc_ki[mc->mc_top]); + } + mdbx_cassert(mc, IS_BRANCH(mc->mc_pg[mc->mc_top])); + + indx = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (unlikely((rc = mdbx_page_get(mc, node_pgno(indx), &mp, NULL)) != 0)) { + /* mc will be inconsistent if caller does mc_snum++ as above */ + mc->mc_flags &= ~(C_INITIALIZED | C_EOF); + return rc; + } + + rc = mdbx_cursor_push(mc, mp); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + if (!move_right) + mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mp) - 1; + + return MDBX_SUCCESS; +} + +/* Move the cursor to the next data item. */ +static int mdbx_cursor_next(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, + MDBX_cursor_op op) { + MDBX_page *mp; + MDBX_node *node; + int rc; + + if ((mc->mc_flags & C_DEL) && op == MDBX_NEXT_DUP) + return MDBX_NOTFOUND; + + if (!(mc->mc_flags & C_INITIALIZED)) + return mdbx_cursor_first(mc, key, data); + + mp = mc->mc_pg[mc->mc_top]; + if (mc->mc_flags & C_EOF) { + if (mc->mc_ki[mc->mc_top] + 1u >= page_numkeys(mp)) + return MDBX_NOTFOUND; + mc->mc_flags ^= C_EOF; + } + + if (mc->mc_db->md_flags & MDBX_DUPSORT) { + node = page_node(mp, mc->mc_ki[mc->mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + if (op == MDBX_NEXT || op == MDBX_NEXT_DUP) { + rc = + mdbx_cursor_next(&mc->mc_xcursor->mx_cursor, data, NULL, MDBX_NEXT); + if (op != MDBX_NEXT || rc != MDBX_NOTFOUND) { + if (likely(rc == MDBX_SUCCESS)) + get_key_optional(node, key); + return rc; + } + } + } else { + mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + if (op == MDBX_NEXT_DUP) + return MDBX_NOTFOUND; + } + } + + mdbx_debug("cursor_next: top page is %" PRIaPGNO " in cursor %p", mp->mp_pgno, + (void *)mc); + if (mc->mc_flags & C_DEL) { + mc->mc_flags ^= C_DEL; + goto skip; + } + + if (mc->mc_ki[mc->mc_top] + 1u >= page_numkeys(mp)) { + mdbx_debug("%s", "=====> move to next sibling page"); + if (unlikely((rc = mdbx_cursor_sibling(mc, 1)) != MDBX_SUCCESS)) { + mc->mc_flags |= C_EOF; + return rc; + } + mp = mc->mc_pg[mc->mc_top]; + mdbx_debug("next page is %" PRIaPGNO ", key index %u", mp->mp_pgno, + mc->mc_ki[mc->mc_top]); + } else + mc->mc_ki[mc->mc_top]++; + +skip: + mdbx_debug("==> cursor points to page %" PRIaPGNO + " with %u keys, key index %u", + mp->mp_pgno, page_numkeys(mp), mc->mc_ki[mc->mc_top]); + + if (IS_LEAF2(mp)) { + if (likely(key)) { + key->iov_len = mc->mc_db->md_xsize; + key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); + } + return MDBX_SUCCESS; + } + + mdbx_cassert(mc, IS_LEAF(mp)); + node = page_node(mp, mc->mc_ki[mc->mc_top]); + + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + if (data) { + if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) + return rc; + + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + } + + get_key_optional(node, key); + return MDBX_SUCCESS; +} + +/* Move the cursor to the previous data item. */ +static int mdbx_cursor_prev(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, + MDBX_cursor_op op) { + MDBX_page *mp; + MDBX_node *node; + int rc; + + if ((mc->mc_flags & C_DEL) && op == MDBX_PREV_DUP) + return MDBX_NOTFOUND; + + if (!(mc->mc_flags & C_INITIALIZED)) { + rc = mdbx_cursor_last(mc, key, data); + if (unlikely(rc)) + return rc; + mc->mc_ki[mc->mc_top]++; + } + + mp = mc->mc_pg[mc->mc_top]; + if ((mc->mc_db->md_flags & MDBX_DUPSORT) && + mc->mc_ki[mc->mc_top] < page_numkeys(mp)) { + node = page_node(mp, mc->mc_ki[mc->mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + if (op == MDBX_PREV || op == MDBX_PREV_DUP) { + rc = + mdbx_cursor_prev(&mc->mc_xcursor->mx_cursor, data, NULL, MDBX_PREV); + if (op != MDBX_PREV || rc != MDBX_NOTFOUND) { + if (likely(rc == MDBX_SUCCESS)) { + get_key_optional(node, key); + mc->mc_flags &= ~C_EOF; + } + return rc; + } + } + } else { + mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + if (op == MDBX_PREV_DUP) + return MDBX_NOTFOUND; + } + } + + mdbx_debug("cursor_prev: top page is %" PRIaPGNO " in cursor %p", mp->mp_pgno, + (void *)mc); + + mc->mc_flags &= ~(C_EOF | C_DEL); + + if (mc->mc_ki[mc->mc_top] == 0) { + mdbx_debug("%s", "=====> move to prev sibling page"); + if ((rc = mdbx_cursor_sibling(mc, 0)) != MDBX_SUCCESS) { + return rc; + } + mp = mc->mc_pg[mc->mc_top]; + mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mp) - 1; + mdbx_debug("prev page is %" PRIaPGNO ", key index %u", mp->mp_pgno, + mc->mc_ki[mc->mc_top]); + } else + mc->mc_ki[mc->mc_top]--; + + mdbx_debug("==> cursor points to page %" PRIaPGNO + " with %u keys, key index %u", + mp->mp_pgno, page_numkeys(mp), mc->mc_ki[mc->mc_top]); + + if (IS_LEAF2(mp)) { + if (likely(key)) { + key->iov_len = mc->mc_db->md_xsize; + key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); + } + return MDBX_SUCCESS; + } + + mdbx_cassert(mc, IS_LEAF(mp)); + node = page_node(mp, mc->mc_ki[mc->mc_top]); + + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + if (data) { + if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) + return rc; + + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + } + + get_key_optional(node, key); + return MDBX_SUCCESS; +} + +/* Set the cursor on a specific data item. */ +static int mdbx_cursor_set(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, + MDBX_cursor_op op, int *exactp) { + int rc; + MDBX_page *mp; + MDBX_node *node = NULL; + int stub_exactp; + DKBUF; + + exactp = exactp ? exactp : &stub_exactp; + + if ((mc->mc_db->md_flags & MDBX_INTEGERKEY) && + unlikely(key->iov_len != sizeof(uint32_t) && + key->iov_len != sizeof(uint64_t))) { + mdbx_cassert(mc, !"key-size is invalid for MDBX_INTEGERKEY"); + return MDBX_BAD_VALSIZE; + } + + if (mc->mc_xcursor) + mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + + /* See if we're already on the right page */ + if (mc->mc_flags & C_INITIALIZED) { + MDBX_val nodekey; + + mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); + mp = mc->mc_pg[mc->mc_top]; + if (!page_numkeys(mp)) { + mc->mc_ki[mc->mc_top] = 0; + return MDBX_NOTFOUND; + } + if (IS_LEAF2(mp)) { + nodekey.iov_len = mc->mc_db->md_xsize; + nodekey.iov_base = page_leaf2key(mp, 0, nodekey.iov_len); + } else { + node = page_node(mp, 0); + get_key(node, &nodekey); + } + rc = mc->mc_dbx->md_cmp(key, &nodekey); + if (unlikely(rc == 0)) { + /* Probably happens rarely, but first node on the page + * was the one we wanted. */ + mc->mc_ki[mc->mc_top] = 0; + *exactp = 1; + goto set1; + } + if (rc > 0) { + const unsigned nkeys = page_numkeys(mp); + unsigned i; + if (nkeys > 1) { + if (IS_LEAF2(mp)) { + nodekey.iov_base = page_leaf2key(mp, nkeys - 1, nodekey.iov_len); + } else { + node = page_node(mp, nkeys - 1); + get_key(node, &nodekey); + } + rc = mc->mc_dbx->md_cmp(key, &nodekey); + if (rc == 0) { + /* last node was the one we wanted */ + mdbx_cassert(mc, nkeys >= 1 && nkeys <= UINT16_MAX + 1); + mc->mc_ki[mc->mc_top] = (indx_t)(nkeys - 1); + *exactp = 1; + goto set1; + } + if (rc < 0) { + if (mc->mc_ki[mc->mc_top] < page_numkeys(mp)) { + /* This is definitely the right page, skip search_page */ + if (IS_LEAF2(mp)) { + nodekey.iov_base = + page_leaf2key(mp, mc->mc_ki[mc->mc_top], nodekey.iov_len); + } else { + node = page_node(mp, mc->mc_ki[mc->mc_top]); + get_key(node, &nodekey); + } + rc = mc->mc_dbx->md_cmp(key, &nodekey); + if (rc == 0) { + /* current node was the one we wanted */ + *exactp = 1; + goto set1; + } + } + rc = 0; + mc->mc_flags &= ~C_EOF; + goto set2; + } + } + /* If any parents have right-sibs, search. + * Otherwise, there's nothing further. */ + for (i = 0; i < mc->mc_top; i++) + if (mc->mc_ki[i] < page_numkeys(mc->mc_pg[i]) - 1) + break; + if (i == mc->mc_top) { + /* There are no other pages */ + mdbx_cassert(mc, nkeys <= UINT16_MAX); + mc->mc_ki[mc->mc_top] = (uint16_t)nkeys; + return MDBX_NOTFOUND; + } + } + if (!mc->mc_top) { + /* There are no other pages */ + mc->mc_ki[mc->mc_top] = 0; + if (op == MDBX_SET_RANGE && exactp == &stub_exactp) { + rc = 0; + goto set1; + } else + return MDBX_NOTFOUND; + } + } else { + mc->mc_pg[0] = 0; + } + + rc = mdbx_page_search(mc, key, 0); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + mp = mc->mc_pg[mc->mc_top]; + mdbx_cassert(mc, IS_LEAF(mp)); + +set2: + node = mdbx_node_search(mc, key, exactp); + if (exactp != &stub_exactp && !*exactp) { + /* MDBX_SET specified and not an exact match. */ + return MDBX_NOTFOUND; + } + + if (node == NULL) { + mdbx_debug("%s", "===> inexact leaf not found, goto sibling"); + if (unlikely((rc = mdbx_cursor_sibling(mc, 1)) != MDBX_SUCCESS)) { + mc->mc_flags |= C_EOF; + return rc; /* no entries matched */ + } + mp = mc->mc_pg[mc->mc_top]; + mdbx_cassert(mc, IS_LEAF(mp)); + node = page_node(mp, 0); + } + +set1: + mc->mc_flags |= C_INITIALIZED; + mc->mc_flags &= ~C_EOF; + + if (IS_LEAF2(mp)) { + if (op == MDBX_SET_RANGE || op == MDBX_SET_KEY) { + key->iov_len = mc->mc_db->md_xsize; + key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); + } + return MDBX_SUCCESS; + } + + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + if (likely(data)) { + if (F_ISSET(node_flags(node), F_DUPDATA)) { + if (op == MDBX_SET || op == MDBX_SET_KEY || op == MDBX_SET_RANGE) { + rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); + } else { + int ex2, *ex2p; + if (op == MDBX_GET_BOTH) { + ex2p = &ex2; + ex2 = 0; + } else { + ex2p = NULL; + } + rc = mdbx_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, + MDBX_SET_RANGE, ex2p); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + } else if (op == MDBX_GET_BOTH || op == MDBX_GET_BOTH_RANGE) { + MDBX_val olddata; + if (unlikely((rc = mdbx_node_read(mc, node, &olddata)) != MDBX_SUCCESS)) + return rc; + if (unlikely(mc->mc_dbx->md_dcmp == NULL)) + return MDBX_EINVAL; + rc = mc->mc_dbx->md_dcmp(data, &olddata); + if (rc) { + if (op != MDBX_GET_BOTH_RANGE || rc > 0) + return MDBX_NOTFOUND; + rc = 0; + } + *data = olddata; + } else { + if (mc->mc_xcursor) + mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) + return rc; + } + } + + /* The key already matches in all other cases */ + if (op == MDBX_SET_RANGE || op == MDBX_SET_KEY) + get_key_optional(node, key); + + mdbx_debug("==> cursor placed on key [%s], data [%s]", DKEY(key), DVAL(data)); + return rc; +} + +/* Move the cursor to the first item in the database. */ +static int mdbx_cursor_first(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data) { + int rc; + + if (mc->mc_xcursor) + mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + + if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { + rc = mdbx_page_search(mc, NULL, MDBX_PS_FIRST); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); + + mc->mc_flags |= C_INITIALIZED; + mc->mc_flags &= ~C_EOF; + mc->mc_ki[mc->mc_top] = 0; + + if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { + key->iov_len = mc->mc_db->md_xsize; + key->iov_base = page_leaf2key(mc->mc_pg[mc->mc_top], 0, key->iov_len); + return MDBX_SUCCESS; + } + + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], 0); + if (likely(data)) { + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); + if (unlikely(rc)) + return rc; + } else { + if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) + return rc; + } + } + get_key_optional(node, key); + return MDBX_SUCCESS; +} + +/* Move the cursor to the last item in the database. */ +static int mdbx_cursor_last(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data) { + int rc; + + if (mc->mc_xcursor) + mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + + if (likely((mc->mc_flags & (C_EOF | C_DEL)) != C_EOF)) { + if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { + rc = mdbx_page_search(mc, NULL, MDBX_PS_LAST); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); + } + + mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mc->mc_pg[mc->mc_top]) - 1; + mc->mc_flags |= C_INITIALIZED | C_EOF; + + if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { + key->iov_len = mc->mc_db->md_xsize; + key->iov_base = page_leaf2key(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], + key->iov_len); + return MDBX_SUCCESS; + } + + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (likely(data)) { + if (F_ISSET(node_flags(node), F_DUPDATA)) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); + if (unlikely(rc)) + return rc; + } else { + if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) + return rc; + } + } + + get_key_optional(node, key); + return MDBX_SUCCESS; +} + +int mdbx_cursor_get(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, + MDBX_cursor_op op) { + if (unlikely(mc == NULL)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = check_txn(mc->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + int exact = 0; + int (*mfunc)(MDBX_cursor * mc, MDBX_val * key, MDBX_val * data); + switch (op) { + case MDBX_GET_CURRENT: { + if (unlikely(!(mc->mc_flags & C_INITIALIZED))) + return MDBX_EINVAL; + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + const unsigned nkeys = page_numkeys(mp); + if (mc->mc_ki[mc->mc_top] >= nkeys) { + mdbx_cassert(mc, nkeys <= UINT16_MAX); + mc->mc_ki[mc->mc_top] = (uint16_t)nkeys; + return MDBX_NOTFOUND; + } + mdbx_cassert(mc, nkeys > 0); + + rc = MDBX_SUCCESS; + if (IS_LEAF2(mp)) { + key->iov_len = mc->mc_db->md_xsize; + key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); + } else { + MDBX_node *node = page_node(mp, mc->mc_ki[mc->mc_top]); + get_key_optional(node, key); + if (data) { + if (F_ISSET(node_flags(node), F_DUPDATA)) { + if (unlikely(!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); + if (unlikely(rc)) + return rc; + } + rc = mdbx_cursor_get(&mc->mc_xcursor->mx_cursor, data, NULL, + MDBX_GET_CURRENT); + } else { + rc = mdbx_node_read(mc, node, data); + } + if (unlikely(rc)) + return rc; + } + } + break; + } + case MDBX_GET_BOTH: + case MDBX_GET_BOTH_RANGE: + if (unlikely(data == NULL)) + return MDBX_EINVAL; + if (unlikely(mc->mc_xcursor == NULL)) + return MDBX_INCOMPATIBLE; + /* fall through */ + __fallthrough; + case MDBX_SET: + case MDBX_SET_KEY: + case MDBX_SET_RANGE: + if (unlikely(key == NULL)) + return MDBX_EINVAL; + rc = mdbx_cursor_set(mc, key, data, op, + op == MDBX_SET_RANGE ? NULL : &exact); + break; + case MDBX_GET_MULTIPLE: + if (unlikely(data == NULL || !(mc->mc_flags & C_INITIALIZED))) + return MDBX_EINVAL; + if (unlikely(!(mc->mc_db->md_flags & MDBX_DUPFIXED))) + return MDBX_INCOMPATIBLE; + rc = MDBX_SUCCESS; + if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) || + (mc->mc_xcursor->mx_cursor.mc_flags & C_EOF)) + break; + goto fetchm; + case MDBX_NEXT_MULTIPLE: + if (unlikely(data == NULL)) + return MDBX_EINVAL; + if (unlikely(!(mc->mc_db->md_flags & MDBX_DUPFIXED))) + return MDBX_INCOMPATIBLE; + rc = mdbx_cursor_next(mc, key, data, MDBX_NEXT_DUP); + if (rc == MDBX_SUCCESS) { + if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + MDBX_cursor *mx; + fetchm: + mx = &mc->mc_xcursor->mx_cursor; + data->iov_len = + page_numkeys(mx->mc_pg[mx->mc_top]) * mx->mc_db->md_xsize; + data->iov_base = page_data(mx->mc_pg[mx->mc_top]); + mx->mc_ki[mx->mc_top] = (indx_t)page_numkeys(mx->mc_pg[mx->mc_top]) - 1; + } else { + rc = MDBX_NOTFOUND; + } + } + break; + case MDBX_PREV_MULTIPLE: + if (data == NULL) + return MDBX_EINVAL; + if (!(mc->mc_db->md_flags & MDBX_DUPFIXED)) + return MDBX_INCOMPATIBLE; + rc = MDBX_SUCCESS; + if (!(mc->mc_flags & C_INITIALIZED)) + rc = mdbx_cursor_last(mc, key, data); + if (rc == MDBX_SUCCESS) { + MDBX_cursor *mx = &mc->mc_xcursor->mx_cursor; + if (mx->mc_flags & C_INITIALIZED) { + rc = mdbx_cursor_sibling(mx, 0); + if (rc == MDBX_SUCCESS) + goto fetchm; + } else { + rc = MDBX_NOTFOUND; + } + } + break; + case MDBX_NEXT: + case MDBX_NEXT_DUP: + case MDBX_NEXT_NODUP: + rc = mdbx_cursor_next(mc, key, data, op); + break; + case MDBX_PREV: + case MDBX_PREV_DUP: + case MDBX_PREV_NODUP: + rc = mdbx_cursor_prev(mc, key, data, op); + break; + case MDBX_FIRST: + rc = mdbx_cursor_first(mc, key, data); + break; + case MDBX_FIRST_DUP: + mfunc = mdbx_cursor_first; + mmove: + if (unlikely(data == NULL || !(mc->mc_flags & C_INITIALIZED))) + return MDBX_EINVAL; + if (unlikely(mc->mc_xcursor == NULL)) + return MDBX_INCOMPATIBLE; + if (mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top])) { + mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mc->mc_pg[mc->mc_top]); + return MDBX_NOTFOUND; + } + { + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (!F_ISSET(node_flags(node), F_DUPDATA)) { + get_key_optional(node, key); + rc = mdbx_node_read(mc, node, data); + break; + } + } + if (unlikely(!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))) + return MDBX_EINVAL; + rc = mfunc(&mc->mc_xcursor->mx_cursor, data, NULL); + break; + case MDBX_LAST: + rc = mdbx_cursor_last(mc, key, data); + break; + case MDBX_LAST_DUP: + mfunc = mdbx_cursor_last; + goto mmove; + default: + mdbx_debug("unhandled/unimplemented cursor operation %u", op); + return MDBX_EINVAL; + } + + mc->mc_flags &= ~C_DEL; + return rc; +} + +/* Touch all the pages in the cursor stack. Set mc_top. + * Makes sure all the pages are writable, before attempting a write operation. + * [in] mc The cursor to operate on. */ +static int mdbx_cursor_touch(MDBX_cursor *mc) { + int rc = MDBX_SUCCESS; + + if (mc->mc_dbi >= CORE_DBS && + (*mc->mc_dbflag & (DB_DIRTY | DB_DUPDATA)) == 0) { + mdbx_cassert(mc, (mc->mc_flags & C_RECLAIMING) == 0); + /* Touch DB record of named DB */ + MDBX_cursor_couple cx; + if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi)) + return MDBX_BAD_DBI; + rc = mdbx_cursor_init(&cx.outer, mc->mc_txn, MAIN_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_page_search(&cx.outer, &mc->mc_dbx->md_name, MDBX_PS_MODIFY); + if (unlikely(rc)) + return rc; + *mc->mc_dbflag |= DB_DIRTY; + } + mc->mc_top = 0; + if (mc->mc_snum) { + do { + rc = mdbx_page_touch(mc); + } while (!rc && ++(mc->mc_top) < mc->mc_snum); + mc->mc_top = mc->mc_snum - 1; + } + return rc; +} + +int mdbx_cursor_put(MDBX_cursor *mc, const MDBX_val *key, MDBX_val *data, + unsigned flags) { + MDBX_env *env; + MDBX_page *sub_root = NULL; + MDBX_val xdata, *rdata, dkey, olddata; + MDBX_db nested_dupdb; + unsigned mcount = 0, dcount = 0, nospill; + size_t nsize; + int rc2; + unsigned nflags; + DKBUF; + + if (unlikely(mc == NULL || key == NULL || data == NULL)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = check_txn_rw(mc->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + env = mc->mc_txn->mt_env; + + /* Check this first so counter will always be zero on any early failures. */ + if (flags & MDBX_MULTIPLE) { + if (unlikely(!F_ISSET(mc->mc_db->md_flags, MDBX_DUPFIXED))) + return MDBX_INCOMPATIBLE; + if (unlikely(data[1].iov_len >= INT_MAX)) + return MDBX_EINVAL; + dcount = (unsigned)data[1].iov_len; + data[1].iov_len = 0; + } + + if (flags & MDBX_RESERVE) { + if (unlikely(mc->mc_db->md_flags & (MDBX_DUPSORT | MDBX_REVERSEDUP))) + return MDBX_INCOMPATIBLE; + data->iov_base = nullptr; + } + + nospill = flags & MDBX_NOSPILL; + flags &= ~MDBX_NOSPILL; + + if (unlikely(mc->mc_txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) + return (mc->mc_txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; + + if ((mc->mc_flags & C_SUB) == 0) { + if (unlikely(key->iov_len > (size_t)((mc->mc_db->md_flags & MDBX_DUPSORT) + ? env->me_maxkey_ds + : env->me_maxkey_nd) || + data->iov_len > ((mc->mc_db->md_flags & MDBX_DUPSORT) + ? env->me_maxval_ds + : env->me_maxval_nd))) { + return MDBX_BAD_VALSIZE; + } + + if ((mc->mc_db->md_flags & MDBX_INTEGERKEY)) { + if (unlikely(key->iov_len != sizeof(uint32_t) && + key->iov_len != sizeof(uint64_t))) { + mdbx_cassert(mc, !"key-size is invalid for MDBX_INTEGERKEY"); + return MDBX_BAD_VALSIZE; + } + if (unlikely(3 & (uintptr_t)key->iov_base)) { + mdbx_cassert(mc, !"key-alignment is invalid for MDBX_INTEGERKEY"); + return MDBX_BAD_VALSIZE; + } + } + + if ((mc->mc_db->md_flags & MDBX_INTEGERDUP)) { + if (unlikely(data->iov_len != sizeof(uint32_t) && + data->iov_len != sizeof(uint64_t))) { + mdbx_cassert(mc, !"data-size is invalid for MDBX_INTEGERDUP"); + return MDBX_BAD_VALSIZE; + } + if (unlikely(3 & (uintptr_t)data->iov_base)) { + mdbx_cassert(mc, !"data-alignment is invalid for MDBX_INTEGERDUP"); + return MDBX_BAD_VALSIZE; + } + } + } + + mdbx_debug("==> put db %d key [%s], size %" PRIuPTR + ", data [%s] size %" PRIuPTR, + DDBI(mc), DKEY(key), key->iov_len, + DVAL((flags & MDBX_RESERVE) ? nullptr : data), data->iov_len); + + int dupdata_flag = 0; + if ((flags & MDBX_CURRENT) != 0 && (mc->mc_flags & C_SUB) == 0) { + /* Опция MDBX_CURRENT означает, что запрошено обновление текущей записи, + * на которой сейчас стоит курсор. Проверяем что переданный ключ совпадает + * со значением в текущей позиции курсора. + * Здесь проще вызвать mdbx_cursor_get(), так как для обслуживания таблиц + * с MDBX_DUPSORT также требуется текущий размер данных. */ + MDBX_val current_key, current_data; + rc = mdbx_cursor_get(mc, ¤t_key, ¤t_data, MDBX_GET_CURRENT); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + if (mc->mc_dbx->md_cmp(key, ¤t_key) != 0) + return MDBX_EKEYMISMATCH; + + if (F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)) { + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + mdbx_cassert(mc, + mc->mc_xcursor != NULL && + (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)); + /* Если за ключом более одного значения, либо если размер данных + * отличается, то вместо inplace обновления требуется удаление и + * последующая вставка. */ + if (mc->mc_xcursor->mx_db.md_entries > 1 || + current_data.iov_len != data->iov_len) { + rc = mdbx_cursor_del(mc, 0); + if (rc != MDBX_SUCCESS) + return rc; + flags -= MDBX_CURRENT; + } + } else if (unlikely(node_size(key, data) > + /* See note inside leaf_size() */ + env->me_branch_nodemax)) { + rc = mdbx_cursor_del(mc, 0); + if (rc != MDBX_SUCCESS) + return rc; + flags -= MDBX_CURRENT; + } + } + } + + if (mc->mc_db->md_root == P_INVALID) { + /* new database, cursor has nothing to point to */ + mc->mc_snum = 0; + mc->mc_top = 0; + mc->mc_flags &= ~C_INITIALIZED; + rc = MDBX_NO_ROOT; + } else if ((flags & MDBX_CURRENT) == 0) { + int exact = 0; + MDBX_val d2; + if ((flags & MDBX_APPEND) != 0 && mc->mc_db->md_entries > 0) { + MDBX_val k2; + rc = mdbx_cursor_last(mc, &k2, &d2); + if (rc == 0) { + rc = mc->mc_dbx->md_cmp(key, &k2); + if (rc > 0) { + rc = MDBX_NOTFOUND; + mc->mc_ki[mc->mc_top]++; + } else if (unlikely(rc < 0 || (flags & MDBX_APPENDDUP) == 0)) { + /* new key is <= last key */ + rc = MDBX_EKEYMISMATCH; + } + } + } else { + rc = mdbx_cursor_set(mc, (MDBX_val *)key, &d2, MDBX_SET, &exact); + } + if ((flags & MDBX_NOOVERWRITE) && + (rc == MDBX_SUCCESS || rc == MDBX_EKEYMISMATCH)) { + mdbx_debug("duplicate key [%s]", DKEY(key)); + *data = d2; + return MDBX_KEYEXIST; + } + if (rc && unlikely(rc != MDBX_NOTFOUND)) + return rc; + } + + mc->mc_flags &= ~C_DEL; + + /* Cursor is positioned, check for room in the dirty list */ + if (!nospill) { + if (flags & MDBX_MULTIPLE) { + rdata = &xdata; + xdata.iov_len = data->iov_len * dcount; + } else { + rdata = data; + } + if (unlikely(rc2 = mdbx_page_spill(mc, key, rdata))) + return rc2; + } + + if (rc == MDBX_NO_ROOT) { + MDBX_page *np; + /* new database, write a root leaf page */ + mdbx_debug("%s", "allocating new root leaf page"); + if (unlikely(rc2 = mdbx_page_new(mc, P_LEAF, 1, &np))) { + return rc2; + } + rc2 = mdbx_cursor_push(mc, np); + if (unlikely(rc2 != MDBX_SUCCESS)) + return rc2; + mc->mc_db->md_root = np->mp_pgno; + mc->mc_db->md_depth++; + *mc->mc_dbflag |= DB_DIRTY; + if ((mc->mc_db->md_flags & (MDBX_DUPSORT | MDBX_DUPFIXED)) == MDBX_DUPFIXED) + np->mp_flags |= P_LEAF2; + mc->mc_flags |= C_INITIALIZED; + } else { + /* make sure all cursor pages are writable */ + rc2 = mdbx_cursor_touch(mc); + if (unlikely(rc2)) + return rc2; + } + + bool insert_key, insert_data, do_sub = false; + insert_key = insert_data = (rc != MDBX_SUCCESS); + uint16_t fp_flags = P_LEAF | P_DIRTY; + MDBX_page *fp = env->me_pbuf; + fp->mp_txnid = INVALID_TXNID; + if (insert_key) { + /* The key does not exist */ + mdbx_debug("inserting key at index %i", mc->mc_ki[mc->mc_top]); + if ((mc->mc_db->md_flags & MDBX_DUPSORT) && + node_size(key, data) > + /* See note inside leaf_size() */ env->me_branch_nodemax) { + /* Too big for a node, insert in sub-DB. Set up an empty + * "old sub-page" for prep_subDB to expand to a full page. */ + fp->mp_leaf2_ksize = (uint16_t)data->iov_len /* used if MDBX_DUPFIXED */; + fp->mp_lower = fp->mp_upper = 0; + olddata.iov_len = PAGEHDRSZ; + goto prep_subDB; + } + } else { + /* there's only a key anyway, so this is a no-op */ + if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { + char *ptr; + unsigned ksize = mc->mc_db->md_xsize; + if (unlikely(key->iov_len != ksize)) + return MDBX_BAD_VALSIZE; + ptr = page_leaf2key(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], ksize); + memcpy(ptr, key->iov_base, ksize); + fix_parent: + /* if overwriting slot 0 of leaf, need to + * update branch key if there is a parent page */ + if (mc->mc_top && !mc->mc_ki[mc->mc_top]) { + unsigned dtop = 1; + mc->mc_top--; + /* slot 0 is always an empty key, find real slot */ + while (mc->mc_top && !mc->mc_ki[mc->mc_top]) { + mc->mc_top--; + dtop++; + } + if (mc->mc_ki[mc->mc_top]) + rc2 = mdbx_update_key(mc, key); + else + rc2 = MDBX_SUCCESS; + mdbx_cassert(mc, mc->mc_top + dtop < UINT16_MAX); + mc->mc_top += (uint16_t)dtop; + if (rc2) + return rc2; + } + + if (mdbx_audit_enabled()) { + int err = mdbx_cursor_check(mc, false); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + return MDBX_SUCCESS; + } + + more:; + if (mdbx_audit_enabled()) { + int err = mdbx_cursor_check(mc, false); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + + /* overflow page overwrites need special handling */ + if (unlikely(F_ISSET(node_flags(node), F_BIGDATA))) { + int level, ovpages, + dpages = (node_size(key, data) > + /* See note inside leaf_size() */ env->me_branch_nodemax) + ? number_of_ovpages(env, data->iov_len) + : 0; + + const pgno_t pg = node_largedata_pgno(node); + MDBX_page *omp; + if (unlikely((rc2 = mdbx_page_get(mc, pg, &omp, &level)) != 0)) + return rc2; + ovpages = omp->mp_pages; + + /* Is the ov page large enough? */ + if (unlikely(mc->mc_flags & C_GCFREEZE) + ? ovpages >= dpages + : ovpages == + /* LY: add configurable threshold to keep reserve space */ + dpages) { + if (!IS_DIRTY(omp) && (level || (env->me_flags & MDBX_WRITEMAP))) { + rc2 = mdbx_page_unspill(mc->mc_txn, omp, &omp); + if (unlikely(rc2)) + return rc2; + level = 0; /* dirty in this txn or clean */ + } + /* Is it dirty? */ + if (IS_DIRTY(omp)) { + mdbx_cassert(mc, omp->mp_txnid > SAFE64_INVALID_THRESHOLD); + /* yes, overwrite it. Note in this case we don't + * bother to try shrinking the page if the new data + * is smaller than the overflow threshold. */ + if (unlikely(level > 1)) { + /* It is writable only in a parent txn */ + MDBX_page *np = mdbx_page_malloc(mc->mc_txn, ovpages); + if (unlikely(!np)) + return MDBX_ENOMEM; + /* Note - this page is already counted in parent's dirtyroom */ + rc2 = mdbx_dpl_append(mc->mc_txn->tw.dirtylist, pg, np); + if (unlikely(rc2 != MDBX_SUCCESS)) { + rc = rc2; + mdbx_dpage_free(env, np, ovpages); + goto fail; + } + + /* Currently we make the page look as with put() in the + * parent txn, in case the user peeks at MDBX_RESERVEd + * or unused parts. Some users treat ovpages specially. */ + const size_t whole = pgno2bytes(env, ovpages); + /* Skip the part where MDBX will put *data. + * Copy end of page, adjusting alignment so + * compiler may copy words instead of bytes. */ + const size_t off = + (PAGEHDRSZ + data->iov_len) & -(intptr_t)sizeof(size_t); + memcpy((size_t *)((char *)np + off), (size_t *)((char *)omp + off), + whole - off); + memcpy(np, omp, PAGEHDRSZ); /* Copy header of page */ + omp = np; + } + node_set_ds(node, data->iov_len); + if (F_ISSET(flags, MDBX_RESERVE)) + data->iov_base = page_data(omp); + else + memcpy(page_data(omp), data->iov_base, data->iov_len); + + if (mdbx_audit_enabled()) { + int err = mdbx_cursor_check(mc, false); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + return MDBX_SUCCESS; + } + } + if ((rc2 = mdbx_page_retire(mc, omp)) != MDBX_SUCCESS) + return rc2; + } else { + olddata.iov_len = node_ds(node); + olddata.iov_base = node_data(node); + mdbx_cassert(mc, (char *)olddata.iov_base + olddata.iov_len <= + (char *)(mc->mc_pg[mc->mc_top]) + env->me_psize); + + /* DB has dups? */ + if (F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)) { + /* Prepare (sub-)page/sub-DB to accept the new item, if needed. + * fp: old sub-page or a header faking it. + * mp: new (sub-)page. offset: growth in page size. + * xdata: node data with new page or DB. */ + unsigned i; + size_t offset = 0; + MDBX_page *mp = fp = xdata.iov_base = env->me_pbuf; + mp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno; + + /* Was a single item before, must convert now */ + if (!F_ISSET(node_flags(node), F_DUPDATA)) { + + /* Just overwrite the current item */ + if (flags & MDBX_CURRENT) { + mdbx_cassert( + mc, + node_size(key, data) <= + /* See note inside leaf_size() */ env->me_branch_nodemax); + goto current; + } + + /* does data match? */ + if (!mc->mc_dbx->md_dcmp(data, &olddata)) { + if (unlikely(flags & (MDBX_NODUPDATA | MDBX_APPENDDUP))) + return MDBX_KEYEXIST; + /* overwrite it */ + mdbx_cassert( + mc, + node_size(key, data) <= + /* See note inside leaf_size() */ env->me_branch_nodemax); + goto current; + } + + /* Back up original data item */ + memcpy(dkey.iov_base = fp + 1, olddata.iov_base, + dkey.iov_len = olddata.iov_len); + dupdata_flag = 1; + + /* Make sub-page header for the dup items, with dummy body */ + fp->mp_flags = P_LEAF | P_DIRTY | P_SUBP; + fp->mp_lower = 0; + xdata.iov_len = PAGEHDRSZ + dkey.iov_len + data->iov_len; + if (mc->mc_db->md_flags & MDBX_DUPFIXED) { + fp->mp_flags |= P_LEAF2; + fp->mp_leaf2_ksize = (uint16_t)data->iov_len; + xdata.iov_len += 2 * data->iov_len; /* leave space for 2 more */ + mdbx_cassert(mc, xdata.iov_len <= env->me_psize); + } else { + xdata.iov_len += 2 * (sizeof(indx_t) + NODESIZE) + + (dkey.iov_len & 1) + (data->iov_len & 1); + mdbx_cassert(mc, xdata.iov_len <= env->me_psize); + } + fp->mp_upper = (uint16_t)(xdata.iov_len - PAGEHDRSZ); + olddata.iov_len = xdata.iov_len; /* pretend olddata is fp */ + } else if (node_flags(node) & F_SUBDATA) { + /* Data is on sub-DB, just store it */ + flags |= F_DUPDATA | F_SUBDATA; + goto put_sub; + } else { + /* Data is on sub-page */ + fp = olddata.iov_base; + switch (flags) { + default: + if (!(mc->mc_db->md_flags & MDBX_DUPFIXED)) { + offset = node_size(data, nullptr) + sizeof(indx_t); + break; + } + offset = fp->mp_leaf2_ksize; + if (page_room(fp) < offset) { + offset *= 4; /* space for 4 more */ + break; + } + /* FALLTHRU: Big enough MDBX_DUPFIXED sub-page */ + __fallthrough; + case MDBX_CURRENT | MDBX_NODUPDATA: + case MDBX_CURRENT: + fp->mp_flags |= P_DIRTY; + fp->mp_txnid = INVALID_TXNID; + fp->mp_pgno = mp->mp_pgno; + mc->mc_xcursor->mx_cursor.mc_pg[0] = fp; + flags |= F_DUPDATA; + goto put_sub; + } + xdata.iov_len = olddata.iov_len + offset; + } + + fp_flags = fp->mp_flags; + if (NODESIZE + node_ks(node) + xdata.iov_len > + /* See note inside leaf_size() */ env->me_branch_nodemax) { + /* Too big for a sub-page, convert to sub-DB */ + fp_flags &= ~P_SUBP; + prep_subDB: + nested_dupdb.md_xsize = 0; + nested_dupdb.md_flags = 0; + if (mc->mc_db->md_flags & MDBX_DUPFIXED) { + fp_flags |= P_LEAF2; + nested_dupdb.md_xsize = fp->mp_leaf2_ksize; + if (mc->mc_db->md_flags & MDBX_INTEGERDUP) + nested_dupdb.md_flags = MDBX_INTEGERKEY; + } + nested_dupdb.md_depth = 1; + nested_dupdb.md_branch_pages = 0; + nested_dupdb.md_leaf_pages = 1; + nested_dupdb.md_overflow_pages = 0; + nested_dupdb.md_entries = page_numkeys(fp); + xdata.iov_len = sizeof(nested_dupdb); + xdata.iov_base = &nested_dupdb; + if ((rc2 = mdbx_page_alloc(mc, 1, &mp, MDBX_ALLOC_ALL))) + return rc2; + mc->mc_db->md_leaf_pages += 1; + mdbx_cassert(mc, env->me_psize > olddata.iov_len); + offset = env->me_psize - (unsigned)olddata.iov_len; + flags |= F_DUPDATA | F_SUBDATA; + nested_dupdb.md_root = mp->mp_pgno; + nested_dupdb.md_seq = nested_dupdb.md_mod_txnid = 0; + sub_root = mp; + } + if (mp != fp) { + mp->mp_flags = fp_flags | P_DIRTY; + mp->mp_txnid = INVALID_TXNID; + mp->mp_leaf2_ksize = fp->mp_leaf2_ksize; + mp->mp_lower = fp->mp_lower; + mdbx_cassert(mc, fp->mp_upper + offset <= UINT16_MAX); + mp->mp_upper = (indx_t)(fp->mp_upper + offset); + if (unlikely(fp_flags & P_LEAF2)) { + memcpy(page_data(mp), page_data(fp), + page_numkeys(fp) * fp->mp_leaf2_ksize); + } else { + memcpy((char *)mp + mp->mp_upper + PAGEHDRSZ, + (char *)fp + fp->mp_upper + PAGEHDRSZ, + olddata.iov_len - fp->mp_upper - PAGEHDRSZ); + memcpy((char *)(&mp->mp_ptrs), (char *)(&fp->mp_ptrs), + page_numkeys(fp) * sizeof(mp->mp_ptrs[0])); + for (i = 0; i < page_numkeys(fp); i++) { + mdbx_cassert(mc, mp->mp_ptrs[i] + offset <= UINT16_MAX); + mp->mp_ptrs[i] += (indx_t)offset; + } + } + } + + rdata = &xdata; + flags |= F_DUPDATA; + do_sub = true; + if (!insert_key) + mdbx_node_del(mc, 0); + goto new_sub; + } + + /* MDBX passes F_SUBDATA in 'flags' to write a DB record */ + if (unlikely((node_flags(node) ^ flags) & F_SUBDATA)) + return MDBX_INCOMPATIBLE; + + current: + if (data->iov_len == olddata.iov_len) { + mdbx_cassert(mc, EVEN(key->iov_len) == EVEN(node_ks(node))); + /* same size, just replace it. Note that we could + * also reuse this node if the new data is smaller, + * but instead we opt to shrink the node in that case. */ + if (F_ISSET(flags, MDBX_RESERVE)) + data->iov_base = olddata.iov_base; + else if (!(mc->mc_flags & C_SUB)) + memcpy(olddata.iov_base, data->iov_base, data->iov_len); + else { + mdbx_cassert(mc, page_numkeys(mc->mc_pg[mc->mc_top]) == 1); + mdbx_cassert(mc, PAGETYPE(mc->mc_pg[mc->mc_top]) == P_LEAF); + mdbx_cassert(mc, node_ds(node) == 0); + mdbx_cassert(mc, node_flags(node) == 0); + mdbx_cassert(mc, key->iov_len < UINT16_MAX); + node_set_ks(node, key->iov_len); + memcpy(node_key(node), key->iov_base, key->iov_len); + mdbx_cassert(mc, (char *)node_key(node) + node_ds(node) < + (char *)(mc->mc_pg[mc->mc_top]) + env->me_psize); + goto fix_parent; + } + + if (mdbx_audit_enabled()) { + int err = mdbx_cursor_check(mc, false); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + return MDBX_SUCCESS; + } + } + mdbx_node_del(mc, 0); + } + + rdata = data; + +new_sub: + nflags = flags & NODE_ADD_FLAGS; + nsize = IS_LEAF2(mc->mc_pg[mc->mc_top]) ? key->iov_len + : leaf_size(env, key, rdata); + if (page_room(mc->mc_pg[mc->mc_top]) < nsize) { + if ((flags & (F_DUPDATA | F_SUBDATA)) == F_DUPDATA) + nflags &= ~MDBX_APPEND; /* sub-page may need room to grow */ + if (!insert_key) + nflags |= MDBX_SPLIT_REPLACE; + rc = mdbx_page_split(mc, key, rdata, P_INVALID, nflags); + if (rc == MDBX_SUCCESS && mdbx_audit_enabled()) + rc = mdbx_cursor_check(mc, false); + } else { + /* There is room already in this leaf page. */ + if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { + mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0 && + rdata->iov_len == 0); + rc = mdbx_node_add_leaf2(mc, mc->mc_ki[mc->mc_top], key); + } else + rc = mdbx_node_add_leaf(mc, mc->mc_ki[mc->mc_top], key, rdata, nflags); + if (likely(rc == 0)) { + /* Adjust other cursors pointing to mp */ + MDBX_cursor *m2, *m3; + MDBX_dbi dbi = mc->mc_dbi; + unsigned i = mc->mc_top; + MDBX_page *mp = mc->mc_pg[i]; + + for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == mc || m3->mc_snum < mc->mc_snum || m3->mc_pg[i] != mp) + continue; + if (m3->mc_ki[i] >= mc->mc_ki[i] && insert_key) { + m3->mc_ki[i]++; + } + if (XCURSOR_INITED(m3)) + XCURSOR_REFRESH(m3, mp, m3->mc_ki[i]); + } + } + } + + if (likely(rc == MDBX_SUCCESS)) { + /* Now store the actual data in the child DB. Note that we're + * storing the user data in the keys field, so there are strict + * size limits on dupdata. The actual data fields of the child + * DB are all zero size. */ + if (do_sub) { + int xflags; + size_t ecount; + put_sub: + xdata.iov_len = 0; + xdata.iov_base = nullptr; + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (flags & MDBX_CURRENT) { + xflags = (flags & MDBX_NODUPDATA) + ? MDBX_CURRENT | MDBX_NOOVERWRITE | MDBX_NOSPILL + : MDBX_CURRENT | MDBX_NOSPILL; + } else { + rc2 = mdbx_xcursor_init1(mc, node); + if (unlikely(rc2 != MDBX_SUCCESS)) + return rc2; + xflags = (flags & MDBX_NODUPDATA) ? MDBX_NOOVERWRITE | MDBX_NOSPILL + : MDBX_NOSPILL; + } + if (sub_root) + mc->mc_xcursor->mx_cursor.mc_pg[0] = sub_root; + /* converted, write the original data first */ + if (dupdata_flag) { + rc = mdbx_cursor_put(&mc->mc_xcursor->mx_cursor, &dkey, &xdata, xflags); + if (unlikely(rc)) + goto bad_sub; + /* we've done our job */ + dkey.iov_len = 0; + } + if (!(node_flags(node) & F_SUBDATA) || sub_root) { + /* Adjust other cursors pointing to mp */ + MDBX_cursor *m2; + MDBX_xcursor *mx = mc->mc_xcursor; + unsigned i = mc->mc_top; + MDBX_page *mp = mc->mc_pg[i]; + const int nkeys = page_numkeys(mp); + + for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2 = m2->mc_next) { + if (m2 == mc || m2->mc_snum < mc->mc_snum) + continue; + if (!(m2->mc_flags & C_INITIALIZED)) + continue; + if (m2->mc_pg[i] == mp) { + if (m2->mc_ki[i] == mc->mc_ki[i]) { + rc2 = mdbx_xcursor_init2(m2, mx, dupdata_flag); + if (unlikely(rc2 != MDBX_SUCCESS)) + return rc2; + } else if (!insert_key && m2->mc_ki[i] < nkeys) { + XCURSOR_REFRESH(m2, mp, m2->mc_ki[i]); + } + } + } + } + mdbx_cassert(mc, mc->mc_xcursor->mx_db.md_entries < PTRDIFF_MAX); + ecount = (size_t)mc->mc_xcursor->mx_db.md_entries; + if (flags & MDBX_APPENDDUP) + xflags |= MDBX_APPEND; + rc = mdbx_cursor_put(&mc->mc_xcursor->mx_cursor, data, &xdata, xflags); + if (flags & F_SUBDATA) { + void *db = node_data(node); + memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDBX_db)); + } + insert_data = (ecount != (size_t)mc->mc_xcursor->mx_db.md_entries); + } + /* Increment count unless we just replaced an existing item. */ + if (insert_data) + mc->mc_db->md_entries++; + if (insert_key) { + /* Invalidate txn if we created an empty sub-DB */ + if (unlikely(rc)) + goto bad_sub; + /* If we succeeded and the key didn't exist before, + * make sure the cursor is marked valid. */ + mc->mc_flags |= C_INITIALIZED; + } + if (flags & MDBX_MULTIPLE) { + if (!rc) { + mcount++; + /* let caller know how many succeeded, if any */ + data[1].iov_len = mcount; + if (mcount < dcount) { + data[0].iov_base = (char *)data[0].iov_base + data[0].iov_len; + insert_key = insert_data = false; + goto more; + } + } + } + if (rc == MDBX_SUCCESS && mdbx_audit_enabled()) + rc = mdbx_cursor_check(mc, false); + return rc; + bad_sub: + if (unlikely(rc == MDBX_KEYEXIST)) + mdbx_error("unexpected %s", "MDBX_KEYEXIST"); + /* should not happen, we deleted that item */ + rc = MDBX_PROBLEM; + } +fail: + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return rc; +} + +int mdbx_cursor_del(MDBX_cursor *mc, unsigned flags) { + if (unlikely(!mc)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = check_txn_rw(mc->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!(mc->mc_flags & C_INITIALIZED))) + return MDBX_EINVAL; + + if (unlikely(mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top]))) + return MDBX_NOTFOUND; + + if (unlikely(!(flags & MDBX_NOSPILL) && + (rc = mdbx_page_spill(mc, NULL, NULL)))) + return rc; + + rc = mdbx_cursor_touch(mc); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + if (IS_LEAF2(mp)) + goto del_key; + + MDBX_node *node = page_node(mp, mc->mc_ki[mc->mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + if (flags & MDBX_NODUPDATA) { + /* mdbx_cursor_del0() will subtract the final entry */ + mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries - 1; + mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; + } else { + if (!F_ISSET(node_flags(node), F_SUBDATA)) { + mc->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); + } + rc = mdbx_cursor_del(&mc->mc_xcursor->mx_cursor, MDBX_NOSPILL); + if (unlikely(rc)) + return rc; + /* If sub-DB still has entries, we're done */ + if (mc->mc_xcursor->mx_db.md_entries) { + if (node_flags(node) & F_SUBDATA) { + /* update subDB info */ + void *db = node_data(node); + memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDBX_db)); + } else { + MDBX_cursor *m2; + /* shrink fake page */ + mdbx_node_shrink(mp, mc->mc_ki[mc->mc_top]); + node = page_node(mp, mc->mc_ki[mc->mc_top]); + mc->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); + /* fix other sub-DB cursors pointed at fake pages on this page */ + for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2 = m2->mc_next) { + if (m2 == mc || m2->mc_snum < mc->mc_snum) + continue; + if (!(m2->mc_flags & C_INITIALIZED)) + continue; + if (m2->mc_pg[mc->mc_top] == mp) { + MDBX_node *inner = node; + if (m2->mc_ki[mc->mc_top] >= page_numkeys(mp)) + continue; + if (m2->mc_ki[mc->mc_top] != mc->mc_ki[mc->mc_top]) { + inner = page_node(mp, m2->mc_ki[mc->mc_top]); + if (node_flags(inner) & F_SUBDATA) + continue; + } + m2->mc_xcursor->mx_cursor.mc_pg[0] = node_data(inner); + } + } + } + mc->mc_db->md_entries--; + mdbx_cassert(mc, mc->mc_db->md_entries > 0 && mc->mc_db->md_depth > 0 && + mc->mc_db->md_root != P_INVALID); + return rc; + } else { + mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; + } + /* otherwise fall thru and delete the sub-DB */ + } + + if (node_flags(node) & F_SUBDATA) { + /* add all the child DB's pages to the free list */ + rc = mdbx_drop0(&mc->mc_xcursor->mx_cursor, 0); + if (unlikely(rc)) + goto fail; + } + } + /* MDBX passes F_SUBDATA in 'flags' to delete a DB record */ + else if (unlikely((node_flags(node) ^ flags) & F_SUBDATA)) { + rc = MDBX_INCOMPATIBLE; + goto fail; + } + + /* add overflow pages to free list */ + if (F_ISSET(node_flags(node), F_BIGDATA)) { + MDBX_page *omp; + if (unlikely( + (rc = mdbx_page_get(mc, node_largedata_pgno(node), &omp, NULL)) || + (rc = mdbx_page_retire(mc, omp)))) + goto fail; + } + +del_key: + return mdbx_cursor_del0(mc); + +fail: + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return rc; +} + +/* Allocate and initialize new pages for a database. + * Set MDBX_TXN_ERROR on failure. + * + * [in] mc a cursor on the database being added to. + * [in] flags flags defining what type of page is being allocated. + * [in] num the number of pages to allocate. This is usually 1, + * unless allocating overflow pages for a large record. + * [out] mp Address of a page, or NULL on failure. + * + * Returns 0 on success, non-zero on failure. */ +static int mdbx_page_new(MDBX_cursor *mc, unsigned flags, unsigned num, + MDBX_page **mp) { + MDBX_page *np; + int rc; + + if (unlikely((rc = mdbx_page_alloc(mc, num, &np, MDBX_ALLOC_ALL)))) + return rc; + *mp = np; + mdbx_debug("allocated new page #%" PRIaPGNO ", size %u", np->mp_pgno, + mc->mc_txn->mt_env->me_psize); + np->mp_flags = (uint16_t)(flags | P_DIRTY); + np->mp_txnid = INVALID_TXNID; + np->mp_lower = 0; + np->mp_upper = (indx_t)(mc->mc_txn->mt_env->me_psize - PAGEHDRSZ); + + mc->mc_db->md_branch_pages += IS_BRANCH(np); + mc->mc_db->md_leaf_pages += IS_LEAF(np); + if (unlikely(IS_OVERFLOW(np))) { + mc->mc_db->md_overflow_pages += num; + np->mp_pages = num; + mdbx_cassert(mc, !(mc->mc_flags & C_SUB)); + } else if (unlikely(mc->mc_flags & C_SUB)) { + MDBX_db *outer = mdbx_outer_db(mc); + outer->md_branch_pages += IS_BRANCH(np); + outer->md_leaf_pages += IS_LEAF(np); + } + + return MDBX_SUCCESS; +} + +static int __must_check_result mdbx_node_add_leaf2(MDBX_cursor *mc, + unsigned indx, + const MDBX_val *key) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + DKBUF; + mdbx_debug("add to leaf2-%spage %" PRIaPGNO " index %i, " + " key size %" PRIuPTR " [%s]", + IS_SUBP(mp) ? "sub-" : "", mp->mp_pgno, indx, + key ? key->iov_len : 0, DKEY(key)); + + mdbx_cassert(mc, key); + mdbx_cassert(mc, PAGETYPE(mp) == (P_LEAF | P_LEAF2)); + const unsigned ksize = mc->mc_db->md_xsize; + mdbx_cassert(mc, ksize == key->iov_len); + const unsigned nkeys = page_numkeys(mp); + + /* Just using these for counting */ + const intptr_t lower = mp->mp_lower + sizeof(indx_t); + const intptr_t upper = mp->mp_upper - (ksize - sizeof(indx_t)); + if (unlikely(lower > upper)) { + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_PAGE_FULL; + } + mp->mp_lower = (indx_t)lower; + mp->mp_upper = (indx_t)upper; + + char *const ptr = page_leaf2key(mp, indx, ksize); + mdbx_cassert(mc, nkeys >= indx); + const unsigned diff = nkeys - indx; + if (likely(diff > 0)) + /* Move higher keys up one slot. */ + memmove(ptr + ksize, ptr, diff * ksize); + /* insert new key */ + memcpy(ptr, key->iov_base, ksize); + return MDBX_SUCCESS; +} + +static int __must_check_result mdbx_node_add_branch(MDBX_cursor *mc, + unsigned indx, + const MDBX_val *key, + pgno_t pgno) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + DKBUF; + mdbx_debug("add to branch-%spage %" PRIaPGNO " index %i, node-pgno %" PRIaPGNO + " key size %" PRIuPTR " [%s]", + IS_SUBP(mp) ? "sub-" : "", mp->mp_pgno, indx, pgno, + key ? key->iov_len : 0, DKEY(key)); + + mdbx_cassert(mc, PAGETYPE(mp) == P_BRANCH); + STATIC_ASSERT(NODESIZE % 2 == 0); + + /* Move higher pointers up one slot. */ + const unsigned nkeys = page_numkeys(mp); + mdbx_cassert(mc, nkeys >= indx); + for (unsigned i = nkeys; i > indx; --i) + mp->mp_ptrs[i] = mp->mp_ptrs[i - 1]; + + /* Adjust free space offsets. */ + const size_t branch_bytes = branch_size(mc->mc_txn->mt_env, key); + const intptr_t lower = mp->mp_lower + sizeof(indx_t); + const intptr_t upper = mp->mp_upper - (branch_bytes - sizeof(indx_t)); + if (unlikely(lower > upper)) { + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_PAGE_FULL; + } + mp->mp_lower = (indx_t)lower; + mp->mp_ptrs[indx] = mp->mp_upper = (indx_t)upper; + + /* Write the node data. */ + MDBX_node *node = page_node(mp, indx); + node_set_pgno(node, pgno); + node_set_flags(node, 0); + UNALIGNED_POKE_8(node, MDBX_node, mn_extra, 0); + node_set_ks(node, 0); + if (likely(key != NULL)) { + node_set_ks(node, key->iov_len); + memcpy(node_key(node), key->iov_base, key->iov_len); + } + return MDBX_SUCCESS; +} + +static int __must_check_result mdbx_node_add_leaf(MDBX_cursor *mc, + unsigned indx, + const MDBX_val *key, + MDBX_val *data, + unsigned flags) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + DKBUF; + mdbx_debug("add to leaf-%spage %" PRIaPGNO " index %i, data size %" PRIuPTR + " key size %" PRIuPTR " [%s]", + IS_SUBP(mp) ? "sub-" : "", mp->mp_pgno, indx, + data ? data->iov_len : 0, key ? key->iov_len : 0, DKEY(key)); + mdbx_cassert(mc, key != NULL && data != NULL); + mdbx_cassert(mc, PAGETYPE(mp) == P_LEAF); + MDBX_page *largepage = NULL; + + size_t leaf_bytes = 0; + if (unlikely(flags & F_BIGDATA)) { + /* Data already on overflow page. */ + STATIC_ASSERT(sizeof(pgno_t) % 2 == 0); + leaf_bytes = node_size(key, nullptr) + sizeof(pgno_t) + sizeof(indx_t); + } else if (unlikely(node_size(key, data) > + /* See note inside leaf_size() */ + mc->mc_txn->mt_env->me_branch_nodemax)) { + /* Put data on overflow page. */ + mdbx_cassert(mc, !F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)); + const pgno_t ovpages = number_of_ovpages(mc->mc_txn->mt_env, data->iov_len); + int rc = mdbx_page_new(mc, P_OVERFLOW, ovpages, &largepage); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + mdbx_debug("allocated %u overflow page(s) %" PRIaPGNO "for %" PRIuPTR + " data bytes", + largepage->mp_pages, largepage->mp_pgno, data->iov_len); + flags |= F_BIGDATA; + leaf_bytes = node_size(key, nullptr) + sizeof(pgno_t) + sizeof(indx_t); + } else { + leaf_bytes = node_size(key, data) + sizeof(indx_t); + } + mdbx_cassert(mc, leaf_bytes == leaf_size(mc->mc_txn->mt_env, key, data)); + + /* Move higher pointers up one slot. */ + const unsigned nkeys = page_numkeys(mp); + mdbx_cassert(mc, nkeys >= indx); + for (unsigned i = nkeys; i > indx; --i) + mp->mp_ptrs[i] = mp->mp_ptrs[i - 1]; + + /* Adjust free space offsets. */ + const intptr_t lower = mp->mp_lower + sizeof(indx_t); + const intptr_t upper = mp->mp_upper - (leaf_bytes - sizeof(indx_t)); + if (unlikely(lower > upper)) { + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_PAGE_FULL; + } + mp->mp_lower = (indx_t)lower; + mp->mp_ptrs[indx] = mp->mp_upper = (indx_t)upper; + + /* Write the node data. */ + MDBX_node *node = page_node(mp, indx); + node_set_ks(node, key->iov_len); + node_set_flags(node, (uint8_t)flags); + UNALIGNED_POKE_8(node, MDBX_node, mn_extra, 0); + node_set_ds(node, data->iov_len); + memcpy(node_key(node), key->iov_base, key->iov_len); + + void *nodedata = node_data(node); + if (likely(largepage == NULL)) { + if (unlikely(flags & F_BIGDATA)) + memcpy(nodedata, data->iov_base, sizeof(pgno_t)); + else if (unlikely(flags & MDBX_RESERVE)) + data->iov_base = nodedata; + else if (likely(nodedata != data->iov_base)) + memcpy(nodedata, data->iov_base, data->iov_len); + } else { + poke_pgno(nodedata, largepage->mp_pgno); + nodedata = page_data(largepage); + if (unlikely(flags & MDBX_RESERVE)) + data->iov_base = nodedata; + else if (likely(nodedata != data->iov_base)) + memcpy(nodedata, data->iov_base, data->iov_len); + } + return MDBX_SUCCESS; +} + +/* Delete the specified node from a page. + * [in] mc Cursor pointing to the node to delete. + * [in] ksize The size of a node. Only used if the page is + * part of a MDBX_DUPFIXED database. */ +static void mdbx_node_del(MDBX_cursor *mc, size_t ksize) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + int indx = mc->mc_ki[mc->mc_top]; + int i, j, nkeys, ptr; + MDBX_node *node; + char *base; + + mdbx_debug("delete node %u on %s page %" PRIaPGNO, indx, + IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno); + nkeys = page_numkeys(mp); + mdbx_cassert(mc, indx < nkeys); + + if (IS_LEAF2(mp)) { + mdbx_cassert(mc, ksize >= sizeof(indx_t)); + unsigned diff = nkeys - 1 - indx; + base = page_leaf2key(mp, indx, ksize); + if (diff) + memmove(base, base + ksize, diff * ksize); + mdbx_cassert(mc, mp->mp_lower >= sizeof(indx_t)); + mp->mp_lower -= sizeof(indx_t); + mdbx_cassert(mc, + (size_t)UINT16_MAX - mp->mp_upper >= ksize - sizeof(indx_t)); + mp->mp_upper += (indx_t)(ksize - sizeof(indx_t)); + return; + } + + node = page_node(mp, indx); + size_t sz = NODESIZE + node_ks(node); + if (IS_LEAF(mp)) { + if (F_ISSET(node_flags(node), F_BIGDATA)) + sz += sizeof(pgno_t); + else + sz += node_ds(node); + } + sz = EVEN(sz); + + ptr = mp->mp_ptrs[indx]; + for (i = j = 0; i < nkeys; i++) { + if (i != indx) { + mp->mp_ptrs[j] = mp->mp_ptrs[i]; + if (mp->mp_ptrs[i] < ptr) { + mdbx_cassert(mc, (size_t)UINT16_MAX - mp->mp_ptrs[j] >= sz); + mp->mp_ptrs[j] += (indx_t)sz; + } + j++; + } + } + + base = (char *)mp + mp->mp_upper + PAGEHDRSZ; + memmove(base + sz, base, ptr - mp->mp_upper); + + mdbx_cassert(mc, mp->mp_lower >= sizeof(indx_t)); + mp->mp_lower -= sizeof(indx_t); + mdbx_cassert(mc, (size_t)UINT16_MAX - mp->mp_upper >= sz); + mp->mp_upper += (indx_t)sz; +} + +/* Compact the main page after deleting a node on a subpage. + * [in] mp The main page to operate on. + * [in] indx The index of the subpage on the main page. */ +static void mdbx_node_shrink(MDBX_page *mp, unsigned indx) { + MDBX_node *node; + MDBX_page *sp, *xp; + char *base; + size_t nsize, delta, len, ptr; + int i; + + node = page_node(mp, indx); + sp = (MDBX_page *)node_data(node); + delta = page_room(sp); + assert(delta > 0); + + /* Prepare to shift upward, set len = length(subpage part to shift) */ + if (IS_LEAF2(sp)) { + delta &= /* do not make the node uneven-sized */ ~(size_t)1; + if (unlikely(delta) == 0) + return; + nsize = node_ds(node) - delta; + assert(nsize % 1 == 0); + len = nsize; + } else { + xp = (MDBX_page *)((char *)sp + delta); /* destination subpage */ + for (i = page_numkeys(sp); --i >= 0;) { + assert(sp->mp_ptrs[i] >= delta); + xp->mp_ptrs[i] = (indx_t)(sp->mp_ptrs[i] - delta); + } + nsize = node_ds(node) - delta; + len = PAGEHDRSZ; + } + sp->mp_upper = sp->mp_lower; + sp->mp_pgno = mp->mp_pgno; + node_set_ds(node, nsize); + + /* Shift upward */ + base = (char *)mp + mp->mp_upper + PAGEHDRSZ; + memmove(base + delta, base, (char *)sp + len - base); + + ptr = mp->mp_ptrs[indx]; + for (i = page_numkeys(mp); --i >= 0;) { + if (mp->mp_ptrs[i] <= ptr) { + assert((size_t)UINT16_MAX - mp->mp_ptrs[i] >= delta); + mp->mp_ptrs[i] += (indx_t)delta; + } + } + assert((size_t)UINT16_MAX - mp->mp_upper >= delta); + mp->mp_upper += (indx_t)delta; +} + +/* Initial setup of a sorted-dups cursor. + * + * Sorted duplicates are implemented as a sub-database for the given key. + * The duplicate data items are actually keys of the sub-database. + * Operations on the duplicate data items are performed using a sub-cursor + * initialized when the sub-database is first accessed. This function does + * the preliminary setup of the sub-cursor, filling in the fields that + * depend only on the parent DB. + * + * [in] mc The main cursor whose sorted-dups cursor is to be initialized. */ +static int mdbx_xcursor_init0(MDBX_cursor *mc) { + MDBX_xcursor *mx = mc->mc_xcursor; + if (unlikely(mx == nullptr)) + return MDBX_CORRUPTED; + + mx->mx_cursor.mc_xcursor = NULL; + mx->mx_cursor.mc_txn = mc->mc_txn; + mx->mx_cursor.mc_db = &mx->mx_db; + mx->mx_cursor.mc_dbx = &mx->mx_dbx; + mx->mx_cursor.mc_dbi = mc->mc_dbi; + mx->mx_cursor.mc_dbflag = &mx->mx_dbflag; + mx->mx_cursor.mc_snum = 0; + mx->mx_cursor.mc_top = 0; + mx->mx_cursor.mc_flags = C_SUB; + mx->mx_dbx.md_name.iov_len = 0; + mx->mx_dbx.md_name.iov_base = NULL; + mx->mx_dbx.md_cmp = mc->mc_dbx->md_dcmp; + mx->mx_dbx.md_dcmp = NULL; + return MDBX_SUCCESS; +} + +/* Final setup of a sorted-dups cursor. + * Sets up the fields that depend on the data from the main cursor. + * [in] mc The main cursor whose sorted-dups cursor is to be initialized. + * [in] node The data containing the MDBX_db record for the sorted-dup database. + */ +static int mdbx_xcursor_init1(MDBX_cursor *mc, MDBX_node *node) { + MDBX_xcursor *mx = mc->mc_xcursor; + if (unlikely(mx == nullptr)) + return MDBX_CORRUPTED; + + if (node_flags(node) & F_SUBDATA) { + if (unlikely(node_ds(node) != sizeof(MDBX_db))) + return MDBX_CORRUPTED; + memcpy(&mx->mx_db, node_data(node), sizeof(MDBX_db)); + mx->mx_cursor.mc_pg[0] = 0; + mx->mx_cursor.mc_snum = 0; + mx->mx_cursor.mc_top = 0; + mx->mx_cursor.mc_flags = C_SUB; + } else { + if (unlikely(node_ds(node) <= PAGEHDRSZ)) + return MDBX_CORRUPTED; + MDBX_page *fp = node_data(node); + mx->mx_db.md_xsize = 0; + mx->mx_db.md_flags = 0; + mx->mx_db.md_depth = 1; + mx->mx_db.md_branch_pages = 0; + mx->mx_db.md_leaf_pages = 1; + mx->mx_db.md_overflow_pages = 0; + mx->mx_db.md_entries = page_numkeys(fp); + mx->mx_db.md_root = fp->mp_pgno; + mx->mx_cursor.mc_snum = 1; + mx->mx_cursor.mc_top = 0; + mx->mx_cursor.mc_flags = C_INITIALIZED | C_SUB; + mx->mx_cursor.mc_pg[0] = fp; + mx->mx_cursor.mc_ki[0] = 0; + if (mc->mc_db->md_flags & MDBX_DUPFIXED) { + mx->mx_db.md_xsize = fp->mp_leaf2_ksize; + if (mc->mc_db->md_flags & MDBX_INTEGERDUP) + mx->mx_db.md_flags = MDBX_INTEGERKEY; + } + } + mdbx_debug("Sub-db -%u root page %" PRIaPGNO, mx->mx_cursor.mc_dbi, + mx->mx_db.md_root); + mx->mx_dbflag = DB_VALID | DB_USRVALID | DB_DUPDATA; + return MDBX_SUCCESS; +} + +/* Fixup a sorted-dups cursor due to underlying update. + * Sets up some fields that depend on the data from the main cursor. + * Almost the same as init1, but skips initialization steps if the + * xcursor had already been used. + * [in] mc The main cursor whose sorted-dups cursor is to be fixed up. + * [in] src_mx The xcursor of an up-to-date cursor. + * [in] new_dupdata True if converting from a non-F_DUPDATA item. */ +static int mdbx_xcursor_init2(MDBX_cursor *mc, MDBX_xcursor *src_mx, + int new_dupdata) { + MDBX_xcursor *mx = mc->mc_xcursor; + if (unlikely(mx == nullptr)) + return MDBX_CORRUPTED; + + if (new_dupdata) { + mx->mx_cursor.mc_snum = 1; + mx->mx_cursor.mc_top = 0; + mx->mx_cursor.mc_flags |= C_INITIALIZED; + mx->mx_cursor.mc_ki[0] = 0; + mx->mx_dbflag = DB_VALID | DB_USRVALID | DB_DUPDATA; + mx->mx_dbx.md_cmp = src_mx->mx_dbx.md_cmp; + } else if (!(mx->mx_cursor.mc_flags & C_INITIALIZED)) { + return MDBX_SUCCESS; + } + mx->mx_db = src_mx->mx_db; + mx->mx_cursor.mc_pg[0] = src_mx->mx_cursor.mc_pg[0]; + mdbx_debug("Sub-db -%u root page %" PRIaPGNO, mx->mx_cursor.mc_dbi, + mx->mx_db.md_root); + return MDBX_SUCCESS; +} + +/* Initialize a cursor for a given transaction and database. */ +static int mdbx_cursor_init(MDBX_cursor *mc, MDBX_txn *txn, MDBX_dbi dbi) { + mc->mc_signature = MDBX_MC_SIGNATURE; + mc->mc_next = NULL; + mc->mc_backup = NULL; + mc->mc_dbi = dbi; + mc->mc_txn = txn; + mc->mc_db = &txn->mt_dbs[dbi]; + mc->mc_dbx = &txn->mt_dbxs[dbi]; + mc->mc_dbflag = &txn->mt_dbflags[dbi]; + mc->mc_snum = 0; + mc->mc_top = 0; + mc->mc_pg[0] = 0; + mc->mc_flags = 0; + mc->mc_ki[0] = 0; + mc->mc_xcursor = NULL; + + if (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) { + STATIC_ASSERT(offsetof(MDBX_cursor_couple, outer) == 0); + MDBX_xcursor *mx = &container_of(mc, MDBX_cursor_couple, outer)->inner; + mdbx_tassert(txn, mx != NULL); + mx->mx_cursor.mc_signature = MDBX_MC_SIGNATURE; + mc->mc_xcursor = mx; + int rc = mdbx_xcursor_init0(mc); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + int rc = MDBX_SUCCESS; + if (unlikely(*mc->mc_dbflag & DB_STALE)) { + rc = mdbx_page_search(mc, NULL, MDBX_PS_ROOTONLY); + rc = (rc != MDBX_NOTFOUND) ? rc : MDBX_SUCCESS; + } + return rc; +} + +int mdbx_cursor_open(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cursor **ret) { + if (unlikely(!ret)) + return MDBX_EINVAL; + *ret = NULL; + + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_VALID))) + return MDBX_EINVAL; + + if (unlikely(dbi == FREE_DBI && !F_ISSET(txn->mt_flags, MDBX_RDONLY))) + return MDBX_EACCESS; + + const size_t size = (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) + ? sizeof(MDBX_cursor_couple) + : sizeof(MDBX_cursor); + + MDBX_cursor *mc; + if (likely((mc = mdbx_malloc(size)) != NULL)) { + rc = mdbx_cursor_init(mc, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_free(mc); + return rc; + } + if (txn->mt_cursors) { + mc->mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = mc; + mc->mc_flags |= C_UNTRACK; + } + } else { + return MDBX_ENOMEM; + } + + *ret = mc; + return MDBX_SUCCESS; +} + +int mdbx_cursor_renew(MDBX_txn *txn, MDBX_cursor *mc) { + if (unlikely(!mc)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE && + mc->mc_signature != MDBX_MC_READY4CLOSE)) + return MDBX_EINVAL; + + int rc = check_txn(mc->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!mdbx_txn_dbi_exists(txn, mc->mc_dbi, DB_VALID))) + return MDBX_EINVAL; + + if (unlikely(mc->mc_backup)) + return MDBX_EINVAL; + + if (unlikely((mc->mc_flags & C_UNTRACK) || txn->mt_cursors)) { + MDBX_cursor **prev = &mc->mc_txn->mt_cursors[mc->mc_dbi]; + while (*prev && *prev != mc) + prev = &(*prev)->mc_next; + if (*prev == mc) + *prev = mc->mc_next; + mc->mc_signature = MDBX_MC_READY4CLOSE; + } + + if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED)) + return MDBX_BAD_TXN; + + return mdbx_cursor_init(mc, txn, mc->mc_dbi); +} + +/* Return the count of duplicate data items for the current key */ +int mdbx_cursor_count(const MDBX_cursor *mc, size_t *countp) { + if (unlikely(mc == NULL)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = check_txn(mc->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(countp == NULL || !(mc->mc_flags & C_INITIALIZED))) + return MDBX_EINVAL; + + if (!mc->mc_snum) { + *countp = 0; + return MDBX_NOTFOUND; + } + + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + if ((mc->mc_flags & C_EOF) && mc->mc_ki[mc->mc_top] >= page_numkeys(mp)) { + *countp = 0; + return MDBX_NOTFOUND; + } + + *countp = 1; + if (mc->mc_xcursor != NULL) { + MDBX_node *node = page_node(mp, mc->mc_ki[mc->mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + mdbx_cassert(mc, mc->mc_xcursor && (mc->mc_xcursor->mx_cursor.mc_flags & + C_INITIALIZED)); + *countp = unlikely(mc->mc_xcursor->mx_db.md_entries > PTRDIFF_MAX) + ? PTRDIFF_MAX + : (size_t)mc->mc_xcursor->mx_db.md_entries; + } + } + return MDBX_SUCCESS; +} + +void mdbx_cursor_close(MDBX_cursor *mc) { + if (mc) { + mdbx_ensure(NULL, mc->mc_signature == MDBX_MC_SIGNATURE || + mc->mc_signature == MDBX_MC_READY4CLOSE); + if (!mc->mc_backup) { + /* Remove from txn, if tracked. + * A read-only txn (!C_UNTRACK) may have been freed already, + * so do not peek inside it. Only write txns track cursors. */ + if ((mc->mc_flags & C_UNTRACK) && mc->mc_txn->mt_cursors) { + MDBX_cursor **prev = &mc->mc_txn->mt_cursors[mc->mc_dbi]; + while (*prev && *prev != mc) + prev = &(*prev)->mc_next; + if (*prev == mc) + *prev = mc->mc_next; + } + mc->mc_signature = 0; + mdbx_free(mc); + } else { + /* cursor closed before nested txn ends */ + mdbx_cassert(mc, mc->mc_signature == MDBX_MC_SIGNATURE); + mc->mc_signature = MDBX_MC_WAIT4EOT; + } + } +} + +MDBX_txn *mdbx_cursor_txn(const MDBX_cursor *mc) { + if (unlikely(!mc || mc->mc_signature != MDBX_MC_SIGNATURE)) + return NULL; + MDBX_txn *txn = mc->mc_txn; + if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE)) + return NULL; + if (unlikely(txn->mt_flags & MDBX_TXN_FINISHED)) + return NULL; + return txn; +} + +MDBX_dbi mdbx_cursor_dbi(const MDBX_cursor *mc) { + if (unlikely(!mc || mc->mc_signature != MDBX_MC_SIGNATURE)) + return UINT_MAX; + return mc->mc_dbi; +} + +/* Replace the key for a branch node with a new key. + * Set MDBX_TXN_ERROR on failure. + * [in] mc Cursor pointing to the node to operate on. + * [in] key The new key to use. + * Returns 0 on success, non-zero on failure. */ +static int mdbx_update_key(MDBX_cursor *mc, const MDBX_val *key) { + MDBX_page *mp; + MDBX_node *node; + char *base; + size_t len; + int delta, ksize, oksize; + int ptr, i, nkeys, indx; + DKBUF; + + indx = mc->mc_ki[mc->mc_top]; + mp = mc->mc_pg[mc->mc_top]; + node = page_node(mp, indx); + ptr = mp->mp_ptrs[indx]; + if (MDBX_DEBUG) { + MDBX_val k2; + char kbuf2[DKBUF_MAXKEYSIZE * 2 + 1]; + k2.iov_base = node_key(node); + k2.iov_len = node_ks(node); + mdbx_debug("update key %u (ofs %u) [%s] to [%s] on page %" PRIaPGNO, indx, + ptr, mdbx_dump_val(&k2, kbuf2, sizeof(kbuf2)), DKEY(key), + mp->mp_pgno); + } + + /* Sizes must be 2-byte aligned. */ + ksize = EVEN(key->iov_len); + oksize = EVEN(node_ks(node)); + delta = ksize - oksize; + + /* Shift node contents if EVEN(key length) changed. */ + if (delta) { + if (delta > (int)page_room(mp)) { + /* not enough space left, do a delete and split */ + mdbx_debug("Not enough room, delta = %d, splitting...", delta); + pgno_t pgno = node_pgno(node); + mdbx_node_del(mc, 0); + int rc = mdbx_page_split(mc, key, NULL, pgno, MDBX_SPLIT_REPLACE); + if (rc == MDBX_SUCCESS && mdbx_audit_enabled()) + rc = mdbx_cursor_check(mc, true); + return rc; + } + + nkeys = page_numkeys(mp); + for (i = 0; i < nkeys; i++) { + if (mp->mp_ptrs[i] <= ptr) { + mdbx_cassert(mc, mp->mp_ptrs[i] >= delta); + mp->mp_ptrs[i] -= (indx_t)delta; + } + } + + base = (char *)mp + mp->mp_upper + PAGEHDRSZ; + len = ptr - mp->mp_upper + NODESIZE; + memmove(base - delta, base, len); + mdbx_cassert(mc, mp->mp_upper >= delta); + mp->mp_upper -= (indx_t)delta; + + node = page_node(mp, indx); + } + + /* But even if no shift was needed, update ksize */ + node_set_ks(node, key->iov_len); + + memcpy(node_key(node), key->iov_base, key->iov_len); + return MDBX_SUCCESS; +} + +/* Move a node from csrc to cdst. */ +static int mdbx_node_move(MDBX_cursor *csrc, MDBX_cursor *cdst, int fromleft) { + int rc; + DKBUF; + + MDBX_page *psrc = csrc->mc_pg[csrc->mc_top]; + MDBX_page *pdst = cdst->mc_pg[cdst->mc_top]; + mdbx_cassert(csrc, PAGETYPE(psrc) == PAGETYPE(pdst)); + mdbx_cassert(csrc, csrc->mc_dbi == cdst->mc_dbi); + mdbx_cassert(csrc, csrc->mc_top == cdst->mc_top); + if (unlikely(PAGETYPE(psrc) != PAGETYPE(pdst))) { + bailout: + csrc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return MDBX_PROBLEM; + } + + MDBX_val key4move; + switch (PAGETYPE(psrc)) { + case P_BRANCH: { + const MDBX_node *srcnode = page_node(psrc, csrc->mc_ki[csrc->mc_top]); + mdbx_cassert(csrc, node_flags(srcnode) == 0); + const pgno_t srcpg = node_pgno(srcnode); + key4move.iov_len = node_ks(srcnode); + key4move.iov_base = node_key(srcnode); + + if (csrc->mc_ki[csrc->mc_top] == 0) { + const uint16_t snum = csrc->mc_snum; + mdbx_cassert(csrc, snum > 0); + /* must find the lowest key below src */ + rc = mdbx_page_search_lowest(csrc); + MDBX_page *lowest_page = csrc->mc_pg[csrc->mc_top]; + if (unlikely(rc)) + return rc; + mdbx_cassert(csrc, IS_LEAF(lowest_page)); + if (unlikely(!IS_LEAF(lowest_page))) + goto bailout; + if (IS_LEAF2(lowest_page)) { + key4move.iov_len = csrc->mc_db->md_xsize; + key4move.iov_base = page_leaf2key(lowest_page, 0, key4move.iov_len); + } else { + const MDBX_node *lowest_node = page_node(lowest_page, 0); + key4move.iov_len = node_ks(lowest_node); + key4move.iov_base = node_key(lowest_node); + } + + /* restore cursor after mdbx_page_search_lowest() */ + csrc->mc_snum = snum; + csrc->mc_top = snum - 1; + csrc->mc_ki[csrc->mc_top] = 0; + + /* paranoia */ + mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); + mdbx_cassert(csrc, IS_BRANCH(psrc)); + if (unlikely(!IS_BRANCH(psrc))) + goto bailout; + } + + if (cdst->mc_ki[cdst->mc_top] == 0) { + const uint16_t snum = cdst->mc_snum; + mdbx_cassert(csrc, snum > 0); + MDBX_cursor mn; + mdbx_cursor_copy(cdst, &mn); + mn.mc_xcursor = NULL; + /* must find the lowest key below dst */ + rc = mdbx_page_search_lowest(&mn); + if (unlikely(rc)) + return rc; + MDBX_page *const lowest_page = mn.mc_pg[mn.mc_top]; + mdbx_cassert(cdst, IS_LEAF(lowest_page)); + if (unlikely(!IS_LEAF(lowest_page))) + goto bailout; + MDBX_val key; + if (IS_LEAF2(lowest_page)) { + key.iov_len = mn.mc_db->md_xsize; + key.iov_base = page_leaf2key(lowest_page, 0, key.iov_len); + } else { + MDBX_node *lowest_node = page_node(lowest_page, 0); + key.iov_len = node_ks(lowest_node); + key.iov_base = node_key(lowest_node); + } + + /* restore cursor after mdbx_page_search_lowest() */ + mn.mc_snum = snum; + mn.mc_top = snum - 1; + mn.mc_ki[mn.mc_top] = 0; + + const intptr_t delta = + EVEN(key.iov_len) - EVEN(node_ks(page_node(mn.mc_pg[mn.mc_top], 0))); + const intptr_t needed = + branch_size(cdst->mc_txn->mt_env, &key4move) + delta; + const intptr_t have = page_room(pdst); + if (unlikely(needed > have)) + return MDBX_RESULT_TRUE; + + if (unlikely((rc = mdbx_page_touch(csrc)) || + (rc = mdbx_page_touch(cdst)))) + return rc; + psrc = csrc->mc_pg[csrc->mc_top]; + pdst = cdst->mc_pg[cdst->mc_top]; + + rc = mdbx_update_key(&mn, &key); + if (unlikely(rc)) + return rc; + } else { + const size_t needed = branch_size(cdst->mc_txn->mt_env, &key4move); + const size_t have = page_room(pdst); + if (unlikely(needed > have)) + return MDBX_RESULT_TRUE; + + if (unlikely((rc = mdbx_page_touch(csrc)) || + (rc = mdbx_page_touch(cdst)))) + return rc; + psrc = csrc->mc_pg[csrc->mc_top]; + pdst = cdst->mc_pg[cdst->mc_top]; + } + + mdbx_debug("moving %s-node %u [%s] on page %" PRIaPGNO + " to node %u on page %" PRIaPGNO, + "branch", csrc->mc_ki[csrc->mc_top], DKEY(&key4move), + psrc->mp_pgno, cdst->mc_ki[cdst->mc_top], pdst->mp_pgno); + /* Add the node to the destination page. */ + rc = + mdbx_node_add_branch(cdst, cdst->mc_ki[cdst->mc_top], &key4move, srcpg); + } break; + + case P_LEAF: { + /* Mark src and dst as dirty. */ + if (unlikely((rc = mdbx_page_touch(csrc)) || (rc = mdbx_page_touch(cdst)))) + return rc; + psrc = csrc->mc_pg[csrc->mc_top]; + pdst = cdst->mc_pg[cdst->mc_top]; + const MDBX_node *srcnode = page_node(psrc, csrc->mc_ki[csrc->mc_top]); + MDBX_val data; + data.iov_len = node_ds(srcnode); + data.iov_base = node_data(srcnode); + key4move.iov_len = node_ks(srcnode); + key4move.iov_base = node_key(srcnode); + mdbx_debug("moving %s-node %u [%s] on page %" PRIaPGNO + " to node %u on page %" PRIaPGNO, + "leaf", csrc->mc_ki[csrc->mc_top], DKEY(&key4move), + psrc->mp_pgno, cdst->mc_ki[cdst->mc_top], pdst->mp_pgno); + /* Add the node to the destination page. */ + rc = mdbx_node_add_leaf(cdst, cdst->mc_ki[cdst->mc_top], &key4move, &data, + node_flags(srcnode)); + } break; + + case P_LEAF | P_LEAF2: { + /* Mark src and dst as dirty. */ + if (unlikely((rc = mdbx_page_touch(csrc)) || (rc = mdbx_page_touch(cdst)))) + return rc; + psrc = csrc->mc_pg[csrc->mc_top]; + pdst = cdst->mc_pg[cdst->mc_top]; + key4move.iov_len = csrc->mc_db->md_xsize; + key4move.iov_base = + page_leaf2key(psrc, csrc->mc_ki[csrc->mc_top], key4move.iov_len); + mdbx_debug("moving %s-node %u [%s] on page %" PRIaPGNO + " to node %u on page %" PRIaPGNO, + "leaf2", csrc->mc_ki[csrc->mc_top], DKEY(&key4move), + psrc->mp_pgno, cdst->mc_ki[cdst->mc_top], pdst->mp_pgno); + /* Add the node to the destination page. */ + rc = mdbx_node_add_leaf2(cdst, cdst->mc_ki[cdst->mc_top], &key4move); + } break; + + default: + goto bailout; + } + + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + /* Delete the node from the source page. */ + mdbx_node_del(csrc, key4move.iov_len); + + mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); + mdbx_cassert(cdst, pdst == cdst->mc_pg[cdst->mc_top]); + mdbx_cassert(csrc, PAGETYPE(psrc) == PAGETYPE(pdst)); + + { + /* Adjust other cursors pointing to mp */ + MDBX_cursor *m2, *m3; + const MDBX_dbi dbi = csrc->mc_dbi; + mdbx_cassert(csrc, csrc->mc_top == cdst->mc_top); + if (fromleft) { + /* If we're adding on the left, bump others up */ + for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (csrc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top) + continue; + if (m3 != cdst && m3->mc_pg[csrc->mc_top] == pdst && + m3->mc_ki[csrc->mc_top] >= cdst->mc_ki[csrc->mc_top]) { + m3->mc_ki[csrc->mc_top]++; + } + if (m3 != csrc && m3->mc_pg[csrc->mc_top] == psrc && + m3->mc_ki[csrc->mc_top] == csrc->mc_ki[csrc->mc_top]) { + m3->mc_pg[csrc->mc_top] = pdst; + m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; + mdbx_cassert(csrc, csrc->mc_top > 0); + m3->mc_ki[csrc->mc_top - 1]++; + } + if (XCURSOR_INITED(m3) && IS_LEAF(psrc)) + XCURSOR_REFRESH(m3, m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]); + } + } else { + /* Adding on the right, bump others down */ + for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (csrc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == csrc) + continue; + if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top) + continue; + if (m3->mc_pg[csrc->mc_top] == psrc) { + if (!m3->mc_ki[csrc->mc_top]) { + m3->mc_pg[csrc->mc_top] = pdst; + m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; + mdbx_cassert(csrc, csrc->mc_top > 0); + m3->mc_ki[csrc->mc_top - 1]--; + } else { + m3->mc_ki[csrc->mc_top]--; + } + if (XCURSOR_INITED(m3) && IS_LEAF(psrc)) + XCURSOR_REFRESH(m3, m3->mc_pg[csrc->mc_top], + m3->mc_ki[csrc->mc_top]); + } + } + } + } + + /* Update the parent separators. */ + if (csrc->mc_ki[csrc->mc_top] == 0) { + mdbx_cassert(csrc, csrc->mc_top > 0); + if (csrc->mc_ki[csrc->mc_top - 1] != 0) { + MDBX_val key; + if (IS_LEAF2(psrc)) { + key.iov_len = psrc->mp_leaf2_ksize; + key.iov_base = page_leaf2key(psrc, 0, key.iov_len); + } else { + MDBX_node *srcnode = page_node(psrc, 0); + key.iov_len = node_ks(srcnode); + key.iov_base = node_key(srcnode); + } + mdbx_debug("update separator for source page %" PRIaPGNO " to [%s]", + psrc->mp_pgno, DKEY(&key)); + MDBX_cursor mn; + mdbx_cursor_copy(csrc, &mn); + mn.mc_xcursor = NULL; + mdbx_cassert(csrc, mn.mc_snum > 0); + mn.mc_snum--; + mn.mc_top--; + /* We want mdbx_rebalance to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, rc = mdbx_update_key(&mn, &key)); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + if (IS_BRANCH(psrc)) { + const MDBX_val nullkey = {0, 0}; + const indx_t ix = csrc->mc_ki[csrc->mc_top]; + csrc->mc_ki[csrc->mc_top] = 0; + rc = mdbx_update_key(csrc, &nullkey); + csrc->mc_ki[csrc->mc_top] = ix; + mdbx_cassert(csrc, rc == MDBX_SUCCESS); + } + } + + if (cdst->mc_ki[cdst->mc_top] == 0) { + mdbx_cassert(cdst, cdst->mc_top > 0); + if (cdst->mc_ki[cdst->mc_top - 1] != 0) { + MDBX_val key; + if (IS_LEAF2(pdst)) { + key.iov_len = pdst->mp_leaf2_ksize; + key.iov_base = page_leaf2key(pdst, 0, key.iov_len); + } else { + MDBX_node *srcnode = page_node(pdst, 0); + key.iov_len = node_ks(srcnode); + key.iov_base = node_key(srcnode); + } + mdbx_debug("update separator for destination page %" PRIaPGNO " to [%s]", + pdst->mp_pgno, DKEY(&key)); + MDBX_cursor mn; + mdbx_cursor_copy(cdst, &mn); + mn.mc_xcursor = NULL; + mdbx_cassert(cdst, mn.mc_snum > 0); + mn.mc_snum--; + mn.mc_top--; + /* We want mdbx_rebalance to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, rc = mdbx_update_key(&mn, &key)); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + if (IS_BRANCH(pdst)) { + const MDBX_val nullkey = {0, 0}; + const indx_t ix = cdst->mc_ki[cdst->mc_top]; + cdst->mc_ki[cdst->mc_top] = 0; + rc = mdbx_update_key(cdst, &nullkey); + cdst->mc_ki[cdst->mc_top] = ix; + mdbx_cassert(cdst, rc == MDBX_SUCCESS); + } + } + + return MDBX_SUCCESS; +} + +/* Merge one page into another. + * + * The nodes from the page pointed to by csrc will be copied to the page + * pointed to by cdst and then the csrc page will be freed. + * + * [in] csrc Cursor pointing to the source page. + * [in] cdst Cursor pointing to the destination page. + * + * Returns 0 on success, non-zero on failure. */ +static int mdbx_page_merge(MDBX_cursor *csrc, MDBX_cursor *cdst) { + MDBX_val key; + int rc; + + mdbx_cassert(csrc, csrc != cdst); + const MDBX_page *const psrc = csrc->mc_pg[csrc->mc_top]; + MDBX_page *pdst = cdst->mc_pg[cdst->mc_top]; + mdbx_debug("merging page %" PRIaPGNO " into %" PRIaPGNO, psrc->mp_pgno, + pdst->mp_pgno); + + mdbx_cassert(csrc, PAGETYPE(psrc) == PAGETYPE(pdst)); + mdbx_cassert(csrc, + csrc->mc_dbi == cdst->mc_dbi && csrc->mc_db == cdst->mc_db); + mdbx_cassert(csrc, csrc->mc_snum > 1); /* can't merge root page */ + mdbx_cassert(cdst, cdst->mc_snum > 1); + mdbx_cassert(cdst, cdst->mc_snum < cdst->mc_db->md_depth || + IS_LEAF(cdst->mc_pg[cdst->mc_db->md_depth - 1])); + mdbx_cassert(csrc, csrc->mc_snum < csrc->mc_db->md_depth || + IS_LEAF(csrc->mc_pg[csrc->mc_db->md_depth - 1])); + mdbx_cassert(cdst, page_room(pdst) >= page_used(cdst->mc_txn->mt_env, psrc)); + const int pagetype = PAGETYPE(psrc); + + /* Move all nodes from src to dst */ + const unsigned dst_nkeys = page_numkeys(pdst); + const unsigned src_nkeys = page_numkeys(psrc); + mdbx_cassert(cdst, dst_nkeys + src_nkeys >= + (unsigned)(IS_LEAF(psrc) ? 1 : MDBX_MINKEYS)); + if (likely(src_nkeys)) { + unsigned j = dst_nkeys; + if (unlikely(pagetype & P_LEAF2)) { + /* Mark dst as dirty. */ + if (unlikely(rc = mdbx_page_touch(cdst))) + return rc; + + key.iov_len = csrc->mc_db->md_xsize; + key.iov_base = page_data(psrc); + unsigned i = 0; + do { + rc = mdbx_node_add_leaf2(cdst, j++, &key); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + key.iov_base = (char *)key.iov_base + key.iov_len; + } while (++i != src_nkeys); + } else { + MDBX_node *srcnode = page_node(psrc, 0); + key.iov_len = node_ks(srcnode); + key.iov_base = node_key(srcnode); + if (pagetype & P_BRANCH) { + MDBX_cursor mn; + mdbx_cursor_copy(csrc, &mn); + mn.mc_xcursor = NULL; + /* must find the lowest key below src */ + rc = mdbx_page_search_lowest(&mn); + if (unlikely(rc)) + return rc; + MDBX_node *lowest = page_node(mn.mc_pg[mn.mc_top], 0); + key.iov_len = node_ks(lowest); + key.iov_base = node_key(lowest); + + const size_t dst_room = page_room(pdst); + const size_t src_used = page_used(cdst->mc_txn->mt_env, psrc); + const size_t space_needed = src_used - node_ks(srcnode) + key.iov_len; + if (unlikely(space_needed > dst_room)) + return MDBX_RESULT_TRUE; + } + + /* Mark dst as dirty. */ + if (unlikely(rc = mdbx_page_touch(cdst))) + return rc; + + unsigned i = 0; + while (true) { + if (pagetype & P_LEAF) { + MDBX_val data; + data.iov_len = node_ds(srcnode); + data.iov_base = node_data(srcnode); + rc = mdbx_node_add_leaf(cdst, j++, &key, &data, node_flags(srcnode)); + } else { + mdbx_cassert(csrc, node_flags(srcnode) == 0); + rc = mdbx_node_add_branch(cdst, j++, &key, node_pgno(srcnode)); + } + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (++i == src_nkeys) + break; + srcnode = page_node(psrc, i); + key.iov_len = node_ks(srcnode); + key.iov_base = node_key(srcnode); + } + } + + pdst = cdst->mc_pg[cdst->mc_top]; + mdbx_debug("dst page %" PRIaPGNO " now has %u keys (%.1f%% filled)", + pdst->mp_pgno, page_numkeys(pdst), + page_fill(cdst->mc_txn->mt_env, pdst)); + + mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); + mdbx_cassert(cdst, pdst == cdst->mc_pg[cdst->mc_top]); + } + + /* Unlink the src page from parent and add to free list. */ + csrc->mc_top--; + mdbx_node_del(csrc, 0); + if (csrc->mc_ki[csrc->mc_top] == 0) { + const MDBX_val nullkey = {0, 0}; + rc = mdbx_update_key(csrc, &nullkey); + if (unlikely(rc)) { + csrc->mc_top++; + return rc; + } + } + csrc->mc_top++; + + mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); + mdbx_cassert(cdst, pdst == cdst->mc_pg[cdst->mc_top]); + + { + /* Adjust other cursors pointing to mp */ + MDBX_cursor *m2, *m3; + const MDBX_dbi dbi = csrc->mc_dbi; + const unsigned top = csrc->mc_top; + + for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (csrc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == csrc || top >= m3->mc_snum) + continue; + if (m3->mc_pg[top] == psrc) { + m3->mc_pg[top] = pdst; + mdbx_cassert(m3, dst_nkeys + m3->mc_ki[top] <= UINT16_MAX); + m3->mc_ki[top] += (indx_t)dst_nkeys; + m3->mc_ki[top - 1] = cdst->mc_ki[top - 1]; + } else if (m3->mc_pg[top - 1] == csrc->mc_pg[top - 1] && + m3->mc_ki[top - 1] > csrc->mc_ki[top - 1]) { + m3->mc_ki[top - 1]--; + } + if (XCURSOR_INITED(m3) && IS_LEAF(psrc)) + XCURSOR_REFRESH(m3, m3->mc_pg[top], m3->mc_ki[top]); + } + } + + /* If not operating on GC, allow this page to be reused + * in this txn. Otherwise just add to free list. */ + rc = mdbx_page_retire(csrc, (MDBX_page *)psrc); + if (unlikely(rc)) + return rc; + + mdbx_cassert(cdst, cdst->mc_db->md_entries > 0); + mdbx_cassert(cdst, cdst->mc_snum <= cdst->mc_db->md_depth); + mdbx_cassert(cdst, cdst->mc_top > 0); + mdbx_cassert(cdst, cdst->mc_snum == cdst->mc_top + 1); + MDBX_page *const top_page = cdst->mc_pg[cdst->mc_top]; + const indx_t top_indx = cdst->mc_ki[cdst->mc_top]; + const uint16_t save_snum = cdst->mc_snum; + const uint16_t save_depth = cdst->mc_db->md_depth; + mdbx_cursor_pop(cdst); + rc = mdbx_rebalance(cdst); + if (unlikely(rc)) + return rc; + + mdbx_cassert(cdst, cdst->mc_db->md_entries > 0); + mdbx_cassert(cdst, cdst->mc_snum <= cdst->mc_db->md_depth); + mdbx_cassert(cdst, cdst->mc_snum == cdst->mc_top + 1); + + if (IS_LEAF(cdst->mc_pg[cdst->mc_top])) { + /* LY: don't touch cursor if top-page is a LEAF */ + mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || + PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); + return MDBX_SUCCESS; + } + + mdbx_cassert(cdst, page_numkeys(top_page) == dst_nkeys + src_nkeys); + + if (pagetype != PAGETYPE(top_page)) { + /* LY: LEAF-page becomes BRANCH, unable restore cursor's stack */ + goto bailout; + } + + if (top_page == cdst->mc_pg[cdst->mc_top]) { + /* LY: don't touch cursor if prev top-page already on the top */ + mdbx_cassert(cdst, cdst->mc_ki[cdst->mc_top] == top_indx); + mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || + PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); + return MDBX_SUCCESS; + } + + const int new_snum = save_snum - save_depth + cdst->mc_db->md_depth; + if (unlikely(new_snum < 1 || new_snum > cdst->mc_db->md_depth)) { + /* LY: out of range, unable restore cursor's stack */ + goto bailout; + } + + if (top_page == cdst->mc_pg[new_snum - 1]) { + mdbx_cassert(cdst, cdst->mc_ki[new_snum - 1] == top_indx); + /* LY: restore cursor stack */ + cdst->mc_snum = (uint16_t)new_snum; + cdst->mc_top = (uint16_t)new_snum - 1; + mdbx_cassert(cdst, cdst->mc_snum < cdst->mc_db->md_depth || + IS_LEAF(cdst->mc_pg[cdst->mc_db->md_depth - 1])); + mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || + PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); + return MDBX_SUCCESS; + } + + MDBX_page *const stub_page = (MDBX_page *)(~(uintptr_t)top_page); + const indx_t stub_indx = top_indx; + if (save_depth > cdst->mc_db->md_depth && + ((cdst->mc_pg[save_snum - 1] == top_page && + cdst->mc_ki[save_snum - 1] == top_indx) || + (cdst->mc_pg[save_snum - 1] == stub_page && + cdst->mc_ki[save_snum - 1] == stub_indx))) { + /* LY: restore cursor stack */ + cdst->mc_pg[new_snum - 1] = top_page; + cdst->mc_ki[new_snum - 1] = top_indx; + cdst->mc_pg[new_snum] = (MDBX_page *)(~(uintptr_t)cdst->mc_pg[new_snum]); + cdst->mc_ki[new_snum] = ~cdst->mc_ki[new_snum]; + cdst->mc_snum = (uint16_t)new_snum; + cdst->mc_top = (uint16_t)new_snum - 1; + mdbx_cassert(cdst, cdst->mc_snum < cdst->mc_db->md_depth || + IS_LEAF(cdst->mc_pg[cdst->mc_db->md_depth - 1])); + mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || + PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); + return MDBX_SUCCESS; + } + +bailout: + /* LY: unable restore cursor's stack */ + cdst->mc_flags &= ~C_INITIALIZED; + return MDBX_CURSOR_FULL; +} + +/* Copy the contents of a cursor. + * [in] csrc The cursor to copy from. + * [out] cdst The cursor to copy to. */ +static void mdbx_cursor_copy(const MDBX_cursor *csrc, MDBX_cursor *cdst) { + mdbx_cassert(csrc, + csrc->mc_txn->mt_txnid >= *csrc->mc_txn->mt_env->me_oldest); + cdst->mc_txn = csrc->mc_txn; + cdst->mc_dbi = csrc->mc_dbi; + cdst->mc_db = csrc->mc_db; + cdst->mc_dbx = csrc->mc_dbx; + cdst->mc_snum = csrc->mc_snum; + cdst->mc_top = csrc->mc_top; + cdst->mc_flags = csrc->mc_flags; + + for (unsigned i = 0; i < csrc->mc_snum; i++) { + cdst->mc_pg[i] = csrc->mc_pg[i]; + cdst->mc_ki[i] = csrc->mc_ki[i]; + } +} + +/* Rebalance the tree after a delete operation. + * [in] mc Cursor pointing to the page where rebalancing should begin. + * Returns 0 on success, non-zero on failure. */ +static int mdbx_rebalance(MDBX_cursor *mc) { + int rc; + + mdbx_cassert(mc, mc->mc_snum > 0); + mdbx_cassert(mc, mc->mc_snum < mc->mc_db->md_depth || + IS_LEAF(mc->mc_pg[mc->mc_db->md_depth - 1])); + const int pagetype = PAGETYPE(mc->mc_pg[mc->mc_top]); + + const unsigned minkeys = (P_BRANCH == 1) ? (pagetype & P_BRANCH) + 1 + : (pagetype & P_BRANCH) ? 2 : 1; + + /* The threshold of minimum page fill factor, in form of a negative binary + * exponent, i.e. 2 means 1/(2**3) == 1/4 == 25%. Pages emptier than this + * are candidates for merging. */ + const unsigned threshold_fill_exp2 = 2; + + /* The threshold of minimum page fill factor, as a number of free bytes on a + * page. Pages emptier than this are candidates for merging. */ + const unsigned spaceleft_threshold = + page_space(mc->mc_txn->mt_env) - + (page_space(mc->mc_txn->mt_env) >> threshold_fill_exp2); + + mdbx_debug("rebalancing %s page %" PRIaPGNO " (has %u keys, %.1f%% full)", + (pagetype & P_LEAF) ? "leaf" : "branch", + mc->mc_pg[mc->mc_top]->mp_pgno, + page_numkeys(mc->mc_pg[mc->mc_top]), + page_fill(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top])); + + if (page_fill_enough(mc->mc_pg[mc->mc_top], spaceleft_threshold, minkeys)) { + mdbx_debug("no need to rebalance page %" PRIaPGNO ", above fill threshold", + mc->mc_pg[mc->mc_top]->mp_pgno); + mdbx_cassert(mc, mc->mc_db->md_entries > 0); + return MDBX_SUCCESS; + } + + if (mc->mc_snum < 2) { + MDBX_page *const mp = mc->mc_pg[0]; + const unsigned nkeys = page_numkeys(mp); + mdbx_cassert(mc, (mc->mc_db->md_entries == 0) == (nkeys == 0)); + if (IS_SUBP(mp)) { + mdbx_debug("%s", "Can't rebalance a subpage, ignoring"); + mdbx_cassert(mc, pagetype & P_LEAF); + return MDBX_SUCCESS; + } + if (nkeys == 0) { + mdbx_cassert(mc, IS_LEAF(mp)); + mdbx_debug("%s", "tree is completely empty"); + mc->mc_db->md_root = P_INVALID; + mc->mc_db->md_depth = 0; + mdbx_cassert(mc, mc->mc_db->md_branch_pages == 0 && + mc->mc_db->md_overflow_pages == 0 && + mc->mc_db->md_leaf_pages == 1); + /* Adjust cursors pointing to mp */ + const MDBX_dbi dbi = mc->mc_dbi; + for (MDBX_cursor *m2 = mc->mc_txn->mt_cursors[dbi]; m2; + m2 = m2->mc_next) { + MDBX_cursor *m3 = + (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == mc || !(m3->mc_flags & C_INITIALIZED)) + continue; + if (m3->mc_pg[0] == mp) { + m3->mc_snum = 0; + m3->mc_top = 0; + m3->mc_flags &= ~C_INITIALIZED; + } + } + mc->mc_snum = 0; + mc->mc_top = 0; + mc->mc_flags &= ~C_INITIALIZED; + + rc = mdbx_page_retire(mc, mp); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } else if (IS_BRANCH(mp) && nkeys == 1) { + mdbx_debug("%s", "collapsing root page!"); + mc->mc_db->md_root = node_pgno(page_node(mp, 0)); + rc = mdbx_page_get(mc, mc->mc_db->md_root, &mc->mc_pg[0], NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + mc->mc_db->md_depth--; + mc->mc_ki[0] = mc->mc_ki[1]; + for (int i = 1; i < mc->mc_db->md_depth; i++) { + mc->mc_pg[i] = mc->mc_pg[i + 1]; + mc->mc_ki[i] = mc->mc_ki[i + 1]; + } + + /* Adjust other cursors pointing to mp */ + MDBX_cursor *m2, *m3; + MDBX_dbi dbi = mc->mc_dbi; + for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == mc || !(m3->mc_flags & C_INITIALIZED)) + continue; + if (m3->mc_pg[0] == mp) { + for (int i = 0; i < mc->mc_db->md_depth; i++) { + m3->mc_pg[i] = m3->mc_pg[i + 1]; + m3->mc_ki[i] = m3->mc_ki[i + 1]; + } + m3->mc_snum--; + m3->mc_top--; + } + } + mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top]) || + PAGETYPE(mc->mc_pg[mc->mc_top]) == pagetype); + mdbx_cassert(mc, mc->mc_snum < mc->mc_db->md_depth || + IS_LEAF(mc->mc_pg[mc->mc_db->md_depth - 1])); + + rc = mdbx_page_retire(mc, mp); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } else { + mdbx_debug("root page %" PRIaPGNO + " doesn't need rebalancing (flags 0x%x)", + mp->mp_pgno, mp->mp_flags); + } + return MDBX_SUCCESS; + } + + /* The parent (branch page) must have at least 2 pointers, + * otherwise the tree is invalid. */ + const unsigned pre_top = mc->mc_top - 1; + mdbx_cassert(mc, IS_BRANCH(mc->mc_pg[pre_top])); + mdbx_cassert(mc, !IS_SUBP(mc->mc_pg[0])); + mdbx_cassert(mc, page_numkeys(mc->mc_pg[pre_top]) > 1); + + /* Leaf page fill factor is below the threshold. + * Try to move keys from left or right neighbor, or + * merge with a neighbor page. */ + + /* Find neighbors. */ + MDBX_cursor mn; + mdbx_cursor_copy(mc, &mn); + mn.mc_xcursor = NULL; + + MDBX_page *left = nullptr, *right = nullptr; + if (mn.mc_ki[pre_top] > 0) { + rc = mdbx_page_get( + &mn, node_pgno(page_node(mn.mc_pg[pre_top], mn.mc_ki[pre_top] - 1)), + &left, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + mdbx_cassert(mc, PAGETYPE(left) == PAGETYPE(mc->mc_pg[mc->mc_top])); + } + if (mn.mc_ki[pre_top] + 1u < page_numkeys(mn.mc_pg[pre_top])) { + rc = mdbx_page_get( + &mn, node_pgno(page_node(mn.mc_pg[pre_top], mn.mc_ki[pre_top] + 1)), + &right, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + mdbx_cassert(mc, PAGETYPE(right) == PAGETYPE(mc->mc_pg[mc->mc_top])); + } + + const indx_t ki_top = mc->mc_ki[mc->mc_top]; + const indx_t ki_pre_top = mn.mc_ki[pre_top]; + const indx_t nkeys = (indx_t)page_numkeys(mn.mc_pg[mn.mc_top]); + if (left && page_room(left) > spaceleft_threshold && + (!right || page_room(right) < page_room(left))) { + /* try merge with left */ + mdbx_cassert(mc, page_numkeys(left) >= minkeys); + mn.mc_pg[mn.mc_top] = left; + mn.mc_ki[mn.mc_top - 1] = ki_pre_top - 1; + mn.mc_ki[mn.mc_top] = (indx_t)(page_numkeys(left) - 1); + mc->mc_ki[mc->mc_top] = 0; + const indx_t new_ki = (indx_t)(ki_top + page_numkeys(left)); + mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1; + /* We want mdbx_rebalance to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, rc = mdbx_page_merge(mc, &mn)); + if (likely(rc != MDBX_RESULT_TRUE)) { + mdbx_cursor_copy(&mn, mc); + mc->mc_ki[mc->mc_top] = new_ki; + mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); + return rc; + } + } + if (right && page_room(right) > spaceleft_threshold) { + /* try merge with right */ + mdbx_cassert(mc, page_numkeys(right) >= minkeys); + mn.mc_pg[mn.mc_top] = right; + mn.mc_ki[mn.mc_top - 1] = ki_pre_top + 1; + mn.mc_ki[mn.mc_top] = 0; + mc->mc_ki[mc->mc_top] = nkeys; + rc = mdbx_page_merge(&mn, mc); + if (likely(rc != MDBX_RESULT_TRUE)) { + mc->mc_ki[mc->mc_top] = ki_top; + mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); + return rc; + } + } + if (left && page_numkeys(left) > minkeys && + (!right || page_numkeys(right) <= minkeys || + page_room(right) > page_room(left))) { + /* try move from left */ + mn.mc_pg[mn.mc_top] = left; + mn.mc_ki[mn.mc_top - 1] = ki_pre_top - 1; + mn.mc_ki[mn.mc_top] = (indx_t)(page_numkeys(left) - 1); + mc->mc_ki[mc->mc_top] = 0; + rc = mdbx_node_move(&mn, mc, true); + if (likely(rc != MDBX_RESULT_TRUE)) { + mc->mc_ki[mc->mc_top] = ki_top + 1; + mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); + return rc; + } + } + if (right && page_numkeys(right) > minkeys) { + /* try move from right */ + mn.mc_pg[mn.mc_top] = right; + mn.mc_ki[mn.mc_top - 1] = ki_pre_top + 1; + mn.mc_ki[mn.mc_top] = 0; + mc->mc_ki[mc->mc_top] = nkeys; + rc = mdbx_node_move(&mn, mc, false); + if (likely(rc != MDBX_RESULT_TRUE)) { + mc->mc_ki[mc->mc_top] = ki_top; + mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); + return rc; + } + } + + if (nkeys >= minkeys) + return MDBX_SUCCESS; + + if (left && (!right || page_room(left) > page_room(right))) { + /* try merge with left */ + mdbx_cassert(mc, page_numkeys(left) >= minkeys); + mn.mc_pg[mn.mc_top] = left; + mn.mc_ki[mn.mc_top - 1] = ki_pre_top - 1; + mn.mc_ki[mn.mc_top] = (indx_t)(page_numkeys(left) - 1); + mc->mc_ki[mc->mc_top] = 0; + const indx_t new_ki = (indx_t)(ki_top + page_numkeys(left)); + mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1; + /* We want mdbx_rebalance to find mn when doing fixups */ + WITH_CURSOR_TRACKING(mn, rc = mdbx_page_merge(mc, &mn)); + if (likely(rc != MDBX_RESULT_TRUE)) { + mdbx_cursor_copy(&mn, mc); + mc->mc_ki[mc->mc_top] = new_ki; + mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); + return rc; + } + } else if (likely(right)) { + /* try merge with right */ + mdbx_cassert(mc, page_numkeys(right) >= minkeys); + mn.mc_pg[mn.mc_top] = right; + mn.mc_ki[mn.mc_top - 1] = ki_pre_top + 1; + mn.mc_ki[mn.mc_top] = 0; + mc->mc_ki[mc->mc_top] = nkeys; + rc = mdbx_page_merge(&mn, mc); + if (likely(rc != MDBX_RESULT_TRUE)) { + mc->mc_ki[mc->mc_top] = ki_top; + mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); + return rc; + } + } + return MDBX_PROBLEM; +} + +static __cold int mdbx_page_check(MDBX_env *env, const MDBX_page *const mp, + bool maybe_unfinished) { + const unsigned nkeys = page_numkeys(mp); + char *const end_of_page = (char *)mp + env->me_psize; + mdbx_assert(env, mp->mp_pgno >= MIN_PAGENO && mp->mp_pgno <= MAX_PAGENO); + if (unlikely(mp->mp_pgno < MIN_PAGENO || mp->mp_pgno > MAX_PAGENO)) + return MDBX_CORRUPTED; + if (IS_OVERFLOW(mp)) { + mdbx_assert(env, mp->mp_pages >= 1 && mp->mp_pages < MAX_PAGENO / 2); + if (unlikely(mp->mp_pages < 1 && mp->mp_pages >= MAX_PAGENO / 2)) + return MDBX_CORRUPTED; + mdbx_assert(env, mp->mp_pgno <= MAX_PAGENO - mp->mp_pages); + if (unlikely(mp->mp_pgno > MAX_PAGENO - mp->mp_pages)) + return MDBX_CORRUPTED; + return MDBX_SUCCESS; + } + if (!(IS_DIRTY(mp) && maybe_unfinished)) { + mdbx_assert(env, nkeys >= 2 || !IS_BRANCH(mp)); + if (unlikely(nkeys < 2 && IS_BRANCH(mp))) + return MDBX_CORRUPTED; + } + + for (unsigned i = IS_LEAF(mp) ? 0 : 1; i < nkeys; ++i) { + if (IS_LEAF2(mp)) { + const size_t ksize = mp->mp_leaf2_ksize; + const char *const key = page_leaf2key(mp, i, ksize); + mdbx_assert(env, key + ksize <= end_of_page); + if (unlikely(end_of_page < key + ksize)) + return MDBX_CORRUPTED; + } else { + const MDBX_node *const node = page_node(mp, i); + const char *node_end = (char *)node + NODESIZE; + mdbx_assert(env, node_end <= end_of_page); + if (unlikely(node_end > end_of_page)) + return MDBX_CORRUPTED; + if (IS_LEAF(mp) || i > 0) { + size_t ksize = node_ks(node); + char *key = node_key(node); + mdbx_assert(env, key + ksize <= end_of_page); + if (unlikely(end_of_page < key + ksize)) + return MDBX_CORRUPTED; + } + if (IS_BRANCH(mp)) + continue; + if (node_flags(node) == F_BIGDATA /* data on large-page */) { + continue; + } + const size_t dsize = node_ds(node); + const char *const data = node_data(node); + mdbx_assert(env, data + dsize <= end_of_page); + if (unlikely(end_of_page < data + dsize)) + return MDBX_CORRUPTED; + + switch (node_flags(node)) { + default: + mdbx_assert(env, false); + return MDBX_CORRUPTED; + case 0 /* usual */: + break; + case F_SUBDATA /* sub-db */: + mdbx_assert(env, dsize >= sizeof(MDBX_db)); + if (unlikely(dsize < sizeof(MDBX_db))) + return MDBX_CORRUPTED; + break; + case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: + mdbx_assert(env, dsize == sizeof(MDBX_db)); + if (unlikely(dsize != sizeof(MDBX_db))) + return MDBX_CORRUPTED; + break; + case F_DUPDATA /* short sub-page */: + mdbx_assert(env, dsize > PAGEHDRSZ); + if (unlikely(dsize <= PAGEHDRSZ)) + return MDBX_CORRUPTED; + else { + const MDBX_page *const sp = (MDBX_page *)data; + const char *const end_of_subpage = data + dsize; + const int nsubkeys = page_numkeys(sp); + switch (sp->mp_flags & ~P_DIRTY /* ignore for sub-pages */) { + case P_LEAF | P_SUBP: + case P_LEAF | P_LEAF2 | P_SUBP: + break; + default: + mdbx_assert(env, false); + return MDBX_CORRUPTED; + } + + for (int j = 0; j < nsubkeys; j++) { + if (IS_LEAF2(sp)) { + /* LEAF2 pages have no mp_ptrs[] or node headers */ + size_t sub_ksize = sp->mp_leaf2_ksize; + char *sub_key = page_leaf2key(sp, j, sub_ksize); + mdbx_assert(env, sub_key + sub_ksize <= end_of_subpage); + if (unlikely(end_of_subpage < sub_key + sub_ksize)) + return MDBX_CORRUPTED; + } else { + mdbx_assert(env, IS_LEAF(sp)); + if (unlikely(!IS_LEAF(sp))) + return MDBX_CORRUPTED; + const MDBX_node *const sub_node = page_node(sp, j); + const char *sub_node_end = (char *)sub_node + NODESIZE; + mdbx_assert(env, sub_node_end <= end_of_subpage); + if (unlikely(sub_node_end > end_of_subpage)) + return MDBX_CORRUPTED; + mdbx_assert(env, node_flags(sub_node) == 0); + if (unlikely(node_flags(sub_node) != 0)) + return MDBX_CORRUPTED; + + size_t sub_ksize = node_ks(sub_node); + char *sub_key = node_key(sub_node); + size_t sub_dsize = node_ds(sub_node); + char *sub_data = node_data(sub_node); + mdbx_assert(env, sub_key + sub_ksize <= end_of_subpage); + if (unlikely(end_of_subpage < sub_key + sub_ksize)) + return MDBX_CORRUPTED; + mdbx_assert(env, sub_data + sub_dsize <= end_of_subpage); + if (unlikely(end_of_subpage < sub_data + sub_dsize)) + return MDBX_CORRUPTED; + } + } + } + break; + } + } + } + return MDBX_SUCCESS; +} + +static __cold int mdbx_cursor_check(MDBX_cursor *mc, bool pending) { + mdbx_tassert(mc->mc_txn, mc->mc_txn->mt_parent || + mc->mc_txn->tw.dirtyroom + + mc->mc_txn->tw.dirtylist->length == + MDBX_DPL_TXNFULL); + mdbx_cassert(mc, mc->mc_top == mc->mc_snum - 1); + if (unlikely(mc->mc_top != mc->mc_snum - 1)) + return MDBX_CURSOR_FULL; + mdbx_cassert(mc, pending ? mc->mc_snum <= mc->mc_db->md_depth + : mc->mc_snum == mc->mc_db->md_depth); + if (unlikely(pending ? mc->mc_snum > mc->mc_db->md_depth + : mc->mc_snum != mc->mc_db->md_depth)) + return MDBX_CURSOR_FULL; + + for (int n = 0; n < mc->mc_snum; ++n) { + MDBX_page *mp = mc->mc_pg[n]; + const unsigned nkeys = page_numkeys(mp); + const bool expect_branch = (n < mc->mc_db->md_depth - 1) ? true : false; + const bool expect_nested_leaf = + (n + 1 == mc->mc_db->md_depth - 1) ? true : false; + const bool branch = IS_BRANCH(mp) ? true : false; + mdbx_cassert(mc, branch == expect_branch); + if (unlikely(branch != expect_branch)) + return MDBX_CURSOR_FULL; + if (!pending) { + mdbx_cassert(mc, + nkeys > mc->mc_ki[n] || (!branch && nkeys == mc->mc_ki[n] && + (mc->mc_flags & C_EOF) != 0)); + if (unlikely(nkeys <= mc->mc_ki[n] && + !(!branch && nkeys == mc->mc_ki[n] && + (mc->mc_flags & C_EOF) != 0))) + return MDBX_CURSOR_FULL; + } else { + mdbx_cassert(mc, nkeys + 1 >= mc->mc_ki[n]); + if (unlikely(nkeys + 1 < mc->mc_ki[n])) + return MDBX_CURSOR_FULL; + } + + int err = mdbx_page_check(mc->mc_txn->mt_env, mp, pending); + if (unlikely(err != MDBX_SUCCESS)) + return err; + + for (unsigned i = 0; i < nkeys; ++i) { + if (branch) { + MDBX_node *node = page_node(mp, i); + mdbx_cassert(mc, node_flags(node) == 0); + if (unlikely(node_flags(node) != 0)) + return MDBX_CURSOR_FULL; + pgno_t pgno = node_pgno(node); + MDBX_page *np; + int rc = mdbx_page_get(mc, pgno, &np, NULL); + mdbx_cassert(mc, rc == MDBX_SUCCESS); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + const bool nested_leaf = IS_LEAF(np) ? true : false; + mdbx_cassert(mc, nested_leaf == expect_nested_leaf); + if (unlikely(nested_leaf != expect_nested_leaf)) + return MDBX_CURSOR_FULL; + err = mdbx_page_check(mc->mc_txn->mt_env, np, pending); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + } + } + return MDBX_SUCCESS; +} + +/* Complete a delete operation started by mdbx_cursor_del(). */ +static int mdbx_cursor_del0(MDBX_cursor *mc) { + int rc; + MDBX_page *mp; + indx_t ki; + unsigned nkeys; + MDBX_cursor *m2, *m3; + MDBX_dbi dbi = mc->mc_dbi; + + mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); + ki = mc->mc_ki[mc->mc_top]; + mp = mc->mc_pg[mc->mc_top]; + mdbx_node_del(mc, mc->mc_db->md_xsize); + mc->mc_db->md_entries--; + { + /* Adjust other cursors pointing to mp */ + for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == mc || !(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) + continue; + if (m3->mc_snum < mc->mc_snum) + continue; + if (m3->mc_pg[mc->mc_top] == mp) { + if (m3->mc_ki[mc->mc_top] == ki) { + m3->mc_flags |= C_DEL; + if (mc->mc_db->md_flags & MDBX_DUPSORT) { + /* Sub-cursor referred into dataset which is gone */ + m3->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); + } + continue; + } else if (m3->mc_ki[mc->mc_top] > ki) { + m3->mc_ki[mc->mc_top]--; + } + if (XCURSOR_INITED(m3)) + XCURSOR_REFRESH(m3, m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]); + } + } + } + rc = mdbx_rebalance(mc); + + if (likely(rc == MDBX_SUCCESS)) { + /* DB is totally empty now, just bail out. + * Other cursors adjustments were already done + * by mdbx_rebalance and aren't needed here. */ + if (!mc->mc_snum) { + mdbx_cassert(mc, mc->mc_db->md_entries == 0 && mc->mc_db->md_depth == 0 && + mc->mc_db->md_root == P_INVALID); + mc->mc_flags |= C_DEL | C_EOF; + return rc; + } + + ki = mc->mc_ki[mc->mc_top]; + mp = mc->mc_pg[mc->mc_top]; + mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); + nkeys = page_numkeys(mp); + mdbx_cassert(mc, (mc->mc_db->md_entries > 0 && nkeys > 0) || + ((mc->mc_flags & C_SUB) && + mc->mc_db->md_entries == 0 && nkeys == 0)); + + /* Adjust THIS and other cursors pointing to mp */ + for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == mc || !(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) + continue; + if (m3->mc_snum < mc->mc_snum) + continue; + if (m3->mc_pg[mc->mc_top] == mp) { + /* if m3 points past last node in page, find next sibling */ + if (m3->mc_ki[mc->mc_top] >= nkeys) { + rc = mdbx_cursor_sibling(m3, true); + if (rc == MDBX_NOTFOUND) { + m3->mc_flags |= C_EOF; + rc = MDBX_SUCCESS; + continue; + } else if (unlikely(rc != MDBX_SUCCESS)) + break; + } + if (m3->mc_ki[mc->mc_top] >= ki || m3->mc_pg[mc->mc_top] != mp) { + if ((mc->mc_db->md_flags & MDBX_DUPSORT) != 0 && + (m3->mc_flags & C_EOF) == 0) { + MDBX_node *node = + page_node(m3->mc_pg[m3->mc_top], m3->mc_ki[m3->mc_top]); + /* If this node has dupdata, it may need to be reinited + * because its data has moved. + * If the xcursor was not initd it must be reinited. + * Else if node points to a subDB, nothing is needed. */ + if (node_flags(node) & F_DUPDATA) { + if (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + if (!(node_flags(node) & F_SUBDATA)) + m3->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); + } else { + rc = mdbx_xcursor_init1(m3, node); + if (unlikely(rc != MDBX_SUCCESS)) + break; + m3->mc_xcursor->mx_cursor.mc_flags |= C_DEL; + } + } + } + } + } + } + + if (mc->mc_ki[mc->mc_top] >= nkeys) { + rc = mdbx_cursor_sibling(mc, true); + if (rc == MDBX_NOTFOUND) { + mc->mc_flags |= C_EOF; + rc = MDBX_SUCCESS; + } + } + if ((mc->mc_db->md_flags & MDBX_DUPSORT) != 0 && + (mc->mc_flags & C_EOF) == 0) { + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + /* If this node has dupdata, it may need to be reinited + * because its data has moved. + * If the xcursor was not initd it must be reinited. + * Else if node points to a subDB, nothing is needed. */ + if (node_flags(node) & F_DUPDATA) { + if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { + if (!(node_flags(node) & F_SUBDATA)) + mc->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); + } else { + rc = mdbx_xcursor_init1(mc, node); + if (likely(rc != MDBX_SUCCESS)) + mc->mc_xcursor->mx_cursor.mc_flags |= C_DEL; + } + } + } + mc->mc_flags |= C_DEL; + } + + if (unlikely(rc)) + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + else if (mdbx_audit_enabled()) + rc = mdbx_cursor_check(mc, false); + + return rc; +} + +int mdbx_del(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, + const MDBX_val *data) { + int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!key)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) + return (txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; + + return mdbx_del0(txn, dbi, key, data, 0); +} + +static int mdbx_del0(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, + const MDBX_val *data, unsigned flags) { + MDBX_cursor_couple cx; + MDBX_cursor_op op; + MDBX_val rdata; + int rc, exact = 0; + DKBUF; + + mdbx_debug("====> delete db %u key [%s], data [%s]", dbi, DKEY(key), + DVAL(data)); + + rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (data) { + op = MDBX_GET_BOTH; + rdata = *data; + data = &rdata; + } else { + op = MDBX_SET; + flags |= MDBX_NODUPDATA; + } + rc = + mdbx_cursor_set(&cx.outer, (MDBX_val *)key, (MDBX_val *)data, op, &exact); + if (likely(rc == MDBX_SUCCESS)) { + /* let mdbx_page_split know about this cursor if needed: + * delete will trigger a rebalance; if it needs to move + * a node from one page to another, it will have to + * update the parent's separator key(s). If the new sepkey + * is larger than the current one, the parent page may + * run out of space, triggering a split. We need this + * cursor to be consistent until the end of the rebalance. */ + cx.outer.mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = &cx.outer; + rc = mdbx_cursor_del(&cx.outer, flags); + txn->mt_cursors[dbi] = cx.outer.mc_next; + } + return rc; +} + +/* Split a page and insert a new node. + * Set MDBX_TXN_ERROR on failure. + * [in,out] mc Cursor pointing to the page and desired insertion index. + * The cursor will be updated to point to the actual page and index where + * the node got inserted after the split. + * [in] newkey The key for the newly inserted node. + * [in] newdata The data for the newly inserted node. + * [in] newpgno The page number, if the new node is a branch node. + * [in] nflags The NODE_ADD_FLAGS for the new node. + * Returns 0 on success, non-zero on failure. */ +static int mdbx_page_split(MDBX_cursor *mc, const MDBX_val *newkey, + MDBX_val *newdata, pgno_t newpgno, unsigned nflags) { + unsigned flags; + int rc = MDBX_SUCCESS, foliage = 0, did_split = 0; + pgno_t pgno = 0; + unsigned i, ptop; + MDBX_env *env = mc->mc_txn->mt_env; + MDBX_val sepkey, rkey, xdata; + MDBX_page *copy = NULL; + MDBX_page *rp, *pp; + MDBX_cursor mn; + DKBUF; + + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + unsigned newindx = mc->mc_ki[mc->mc_top]; + unsigned nkeys = page_numkeys(mp); + if (mdbx_audit_enabled()) { + rc = mdbx_cursor_check(mc, true); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + mdbx_cassert(mc, + nkeys >= (unsigned)(IS_BRANCH(mp) ? MDBX_MINKEYS * 2 - 1 : 1)); + mdbx_debug("-----> splitting %s page %" PRIaPGNO + " and adding [%s] at index %i/%i", + IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno, DKEY(newkey), + mc->mc_ki[mc->mc_top], nkeys); + + /* Create a right sibling. */ + if ((rc = mdbx_page_new(mc, mp->mp_flags, 1, &rp))) + return rc; + rp->mp_leaf2_ksize = mp->mp_leaf2_ksize; + mdbx_debug("new right sibling: page %" PRIaPGNO, rp->mp_pgno); + + /* Usually when splitting the root page, the cursor + * height is 1. But when called from mdbx_update_key, + * the cursor height may be greater because it walks + * up the stack while finding the branch slot to update. */ + if (mc->mc_top < 1) { + if ((rc = mdbx_page_new(mc, P_BRANCH, 1, &pp))) + goto done; + /* shift current top to make room for new parent */ + mdbx_cassert(mc, mc->mc_snum < 2 && mc->mc_db->md_depth > 0); + mc->mc_pg[2] = mc->mc_pg[1]; + mc->mc_ki[2] = mc->mc_ki[1]; + mc->mc_pg[1] = mc->mc_pg[0]; + mc->mc_ki[1] = mc->mc_ki[0]; + mc->mc_pg[0] = pp; + mc->mc_ki[0] = 0; + mc->mc_db->md_root = pp->mp_pgno; + mdbx_debug("root split! new root = %" PRIaPGNO, pp->mp_pgno); + foliage = mc->mc_db->md_depth++; + + /* Add left (implicit) pointer. */ + if (unlikely((rc = mdbx_node_add_branch(mc, 0, NULL, mp->mp_pgno)) != + MDBX_SUCCESS)) { + /* undo the pre-push */ + mc->mc_pg[0] = mc->mc_pg[1]; + mc->mc_ki[0] = mc->mc_ki[1]; + mc->mc_db->md_root = mp->mp_pgno; + mc->mc_db->md_depth--; + goto done; + } + mc->mc_snum++; + mc->mc_top++; + ptop = 0; + } else { + ptop = mc->mc_top - 1; + mdbx_debug("parent branch page is %" PRIaPGNO, mc->mc_pg[ptop]->mp_pgno); + } + + mdbx_cursor_copy(mc, &mn); + mn.mc_xcursor = NULL; + mn.mc_pg[mn.mc_top] = rp; + mn.mc_ki[mn.mc_top] = 0; + mn.mc_ki[ptop] = mc->mc_ki[ptop] + 1; + + unsigned split_indx; + if (nflags & MDBX_APPEND) { + mn.mc_ki[mn.mc_top] = 0; + sepkey = *newkey; + split_indx = newindx; + nkeys = 0; + } else { + split_indx = (nkeys + 1) / 2; + if (IS_LEAF2(rp)) { + char *split, *ins; + unsigned lsize, rsize, ksize; + /* Move half of the keys to the right sibling */ + const int x = mc->mc_ki[mc->mc_top] - split_indx; + ksize = mc->mc_db->md_xsize; + split = page_leaf2key(mp, split_indx, ksize); + rsize = (nkeys - split_indx) * ksize; + lsize = (nkeys - split_indx) * sizeof(indx_t); + mdbx_cassert(mc, mp->mp_lower >= lsize); + mp->mp_lower -= (indx_t)lsize; + mdbx_cassert(mc, rp->mp_lower + lsize <= UINT16_MAX); + rp->mp_lower += (indx_t)lsize; + mdbx_cassert(mc, mp->mp_upper + rsize - lsize <= UINT16_MAX); + mp->mp_upper += (indx_t)(rsize - lsize); + mdbx_cassert(mc, rp->mp_upper >= rsize - lsize); + rp->mp_upper -= (indx_t)(rsize - lsize); + sepkey.iov_len = ksize; + if (newindx == split_indx) { + sepkey.iov_base = newkey->iov_base; + } else { + sepkey.iov_base = split; + } + if (x < 0) { + mdbx_cassert(mc, ksize >= sizeof(indx_t)); + ins = page_leaf2key(mp, mc->mc_ki[mc->mc_top], ksize); + memcpy(rp->mp_ptrs, split, rsize); + sepkey.iov_base = rp->mp_ptrs; + memmove(ins + ksize, ins, (split_indx - mc->mc_ki[mc->mc_top]) * ksize); + memcpy(ins, newkey->iov_base, ksize); + mdbx_cassert(mc, UINT16_MAX - mp->mp_lower >= (int)sizeof(indx_t)); + mp->mp_lower += sizeof(indx_t); + mdbx_cassert(mc, mp->mp_upper >= ksize - sizeof(indx_t)); + mp->mp_upper -= (indx_t)(ksize - sizeof(indx_t)); + } else { + memcpy(rp->mp_ptrs, split, x * ksize); + ins = page_leaf2key(rp, x, ksize); + memcpy(ins, newkey->iov_base, ksize); + memcpy(ins + ksize, split + x * ksize, rsize - x * ksize); + mdbx_cassert(mc, UINT16_MAX - rp->mp_lower >= (int)sizeof(indx_t)); + rp->mp_lower += sizeof(indx_t); + mdbx_cassert(mc, rp->mp_upper >= ksize - sizeof(indx_t)); + rp->mp_upper -= (indx_t)(ksize - sizeof(indx_t)); + mdbx_cassert(mc, x <= (int)UINT16_MAX); + mc->mc_ki[mc->mc_top] = (indx_t)x; + } + } else { + /* Maximum free space in an empty page */ + const unsigned pmax = page_space(env); + const size_t nsize = IS_LEAF(mp) ? leaf_size(env, newkey, newdata) + : branch_size(env, newkey); + + /* grab a page to hold a temporary copy */ + copy = mdbx_page_malloc(mc->mc_txn, 1); + if (unlikely(copy == NULL)) { + rc = MDBX_ENOMEM; + goto done; + } + copy->mp_pgno = mp->mp_pgno; + copy->mp_flags = mp->mp_flags; + copy->mp_txnid = INVALID_TXNID; + copy->mp_lower = 0; + copy->mp_upper = (indx_t)page_space(env); + + /* prepare to insert */ + for (unsigned j = i = 0; i < nkeys; i++) { + if (i == newindx) + copy->mp_ptrs[j++] = 0; + copy->mp_ptrs[j++] = mp->mp_ptrs[i]; + } + + /* When items are relatively large the split point needs + * to be checked, because being off-by-one will make the + * difference between success or failure in mdbx_node_add. + * + * It's also relevant if a page happens to be laid out + * such that one half of its nodes are all "small" and + * the other half of its nodes are "large." If the new + * item is also "large" and falls on the half with + * "large" nodes, it also may not fit. + * + * As a final tweak, if the new item goes on the last + * spot on the page (and thus, onto the new page), bias + * the split so the new page is emptier than the old page. + * This yields better packing during sequential inserts. */ + if (nkeys < 32 || nsize > pmax / 16 || newindx >= nkeys) { + /* Find split point */ + int dir; + size_t psize = 0; + unsigned k; + if (newindx <= split_indx || newindx >= nkeys) { + i = 0; + dir = 1; + k = (newindx >= nkeys) ? nkeys : split_indx + 1 + IS_LEAF(mp); + split_indx = k - 1; + } else { + i = nkeys; + dir = -1; + k = split_indx - 1; + split_indx += 1; + } + do { + if (i == newindx) { + psize += nsize; + } else { + MDBX_node *node = + (MDBX_node *)((char *)mp + copy->mp_ptrs[i] + PAGEHDRSZ); + psize += NODESIZE + node_ks(node) + sizeof(indx_t); + if (IS_LEAF(mp)) + psize += F_ISSET(node_flags(node), F_BIGDATA) ? sizeof(pgno_t) + : node_ds(node); + psize = EVEN(psize); + } + if (psize > pmax) { + split_indx = i + (dir < 0); + break; + } + i += dir; + } while (i != k); + } + + if (split_indx == newindx) { + sepkey.iov_len = newkey->iov_len; + sepkey.iov_base = newkey->iov_base; + } else { + MDBX_node *node = + (MDBX_node *)((char *)mp + copy->mp_ptrs[split_indx] + PAGEHDRSZ); + sepkey.iov_len = node_ks(node); + sepkey.iov_base = node_key(node); + } + } + } + + mdbx_debug("separator is %d [%s]", split_indx, DKEY(&sepkey)); + if (mdbx_audit_enabled()) { + rc = mdbx_cursor_check(mc, true); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + rc = mdbx_cursor_check(&mn, true); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + } + + /* Copy separator key to the parent. */ + if (page_room(mn.mc_pg[ptop]) < branch_size(env, &sepkey)) { + const int snum = mc->mc_snum; + const int depth = mc->mc_db->md_depth; + mn.mc_snum--; + mn.mc_top--; + did_split = 1; + /* We want other splits to find mn when doing fixups */ + WITH_CURSOR_TRACKING( + mn, rc = mdbx_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0)); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + mdbx_cassert(mc, mc->mc_snum - snum == mc->mc_db->md_depth - depth); + if (mdbx_audit_enabled()) { + rc = mdbx_cursor_check(mc, true); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + } + + /* root split? */ + ptop += mc->mc_snum - snum; + + /* Right page might now have changed parent. + * Check if left page also changed parent. */ + if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && + mc->mc_ki[ptop] >= page_numkeys(mc->mc_pg[ptop])) { + for (i = 0; i < ptop; i++) { + mc->mc_pg[i] = mn.mc_pg[i]; + mc->mc_ki[i] = mn.mc_ki[i]; + } + mc->mc_pg[ptop] = mn.mc_pg[ptop]; + if (mn.mc_ki[ptop]) { + mc->mc_ki[ptop] = mn.mc_ki[ptop] - 1; + } else { + /* find right page's left sibling */ + mc->mc_ki[ptop] = mn.mc_ki[ptop]; + rc = mdbx_cursor_sibling(mc, false); + } + } + } else { + mn.mc_top--; + rc = mdbx_node_add_branch(&mn, mn.mc_ki[ptop], &sepkey, rp->mp_pgno); + mn.mc_top++; + } + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc == MDBX_NOTFOUND) /* improper mdbx_cursor_sibling() result */ { + mdbx_error("unexpected %s", "MDBX_NOTFOUND"); + rc = MDBX_PROBLEM; + } + goto done; + } + + if (nflags & MDBX_APPEND) { + mc->mc_pg[mc->mc_top] = rp; + mc->mc_ki[mc->mc_top] = 0; + switch (PAGETYPE(rp)) { + case P_BRANCH: { + mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0); + mdbx_cassert(mc, newpgno != 0 && newpgno != P_INVALID); + rc = mdbx_node_add_branch(mc, 0, newkey, newpgno); + } break; + case P_LEAF: { + mdbx_cassert(mc, newpgno == 0 || newpgno == P_INVALID); + rc = mdbx_node_add_leaf(mc, 0, newkey, newdata, nflags); + } break; + case P_LEAF | P_LEAF2: { + mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0); + mdbx_cassert(mc, newpgno == 0 || newpgno == P_INVALID); + rc = mdbx_node_add_leaf2(mc, 0, newkey); + } break; + default: + rc = MDBX_CORRUPTED; + } + if (rc) + goto done; + for (i = 0; i < mc->mc_top; i++) + mc->mc_ki[i] = mn.mc_ki[i]; + } else if (!IS_LEAF2(mp)) { + /* Move nodes */ + mc->mc_pg[mc->mc_top] = rp; + i = split_indx; + indx_t n = 0; + do { + MDBX_val *rdata = NULL; + if (i == newindx) { + rkey.iov_base = newkey->iov_base; + rkey.iov_len = newkey->iov_len; + if (IS_LEAF(mp)) { + rdata = newdata; + } else + pgno = newpgno; + flags = nflags; + /* Update index for the new key. */ + mc->mc_ki[mc->mc_top] = n; + } else { + MDBX_node *node = + (MDBX_node *)((char *)mp + copy->mp_ptrs[i] + PAGEHDRSZ); + rkey.iov_base = node_key(node); + rkey.iov_len = node_ks(node); + if (IS_LEAF(mp)) { + xdata.iov_base = node_data(node); + xdata.iov_len = node_ds(node); + rdata = &xdata; + } else + pgno = node_pgno(node); + flags = node_flags(node); + } + + switch (PAGETYPE(rp)) { + case P_BRANCH: { + mdbx_cassert(mc, 0 == (uint16_t)flags); + if (n == 0) { + /* First branch index doesn't need key data. */ + rkey.iov_len = 0; + } + rc = mdbx_node_add_branch(mc, n, &rkey, pgno); + } break; + case P_LEAF: { + mdbx_cassert(mc, pgno == 0); + mdbx_cassert(mc, rdata != NULL); + rc = mdbx_node_add_leaf(mc, n, &rkey, rdata, flags); + } break; + /* case P_LEAF | P_LEAF2: { + mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0); + mdbx_cassert(mc, gno == 0); + rc = mdbx_node_add_leaf2(mc, n, &rkey); + } break; */ + default: + rc = MDBX_CORRUPTED; + } + if (rc) + goto done; + + if (i == nkeys) { + i = 0; + n = 0; + mc->mc_pg[mc->mc_top] = copy; + } else { + i++; + n++; + } + } while (i != split_indx); + + nkeys = page_numkeys(copy); + for (i = 0; i < nkeys; i++) + mp->mp_ptrs[i] = copy->mp_ptrs[i]; + mp->mp_lower = copy->mp_lower; + mp->mp_upper = copy->mp_upper; + memcpy(page_node(mp, nkeys - 1), page_node(copy, nkeys - 1), + env->me_psize - copy->mp_upper - PAGEHDRSZ); + + /* reset back to original page */ + if (newindx < split_indx) { + mc->mc_pg[mc->mc_top] = mp; + } else { + mc->mc_pg[mc->mc_top] = rp; + mc->mc_ki[ptop]++; + /* Make sure mc_ki is still valid. */ + if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && + mc->mc_ki[ptop] >= page_numkeys(mc->mc_pg[ptop])) { + for (i = 0; i <= ptop; i++) { + mc->mc_pg[i] = mn.mc_pg[i]; + mc->mc_ki[i] = mn.mc_ki[i]; + } + } + } + if (nflags & MDBX_RESERVE) { + MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); + if (!(node_flags(node) & F_BIGDATA)) + newdata->iov_base = node_data(node); + } + } else { + if (newindx >= split_indx) { + mc->mc_pg[mc->mc_top] = rp; + mc->mc_ki[ptop]++; + /* Make sure mc_ki is still valid. */ + if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && + mc->mc_ki[ptop] >= page_numkeys(mc->mc_pg[ptop])) { + for (i = 0; i <= ptop; i++) { + mc->mc_pg[i] = mn.mc_pg[i]; + mc->mc_ki[i] = mn.mc_ki[i]; + } + } + } + } + + { + /* Adjust other cursors pointing to mp */ + MDBX_cursor *m2, *m3; + MDBX_dbi dbi = mc->mc_dbi; + nkeys = page_numkeys(mp); + + for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { + m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; + if (m3 == mc) + continue; + if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) + continue; + if (foliage) { + int k; + /* sub cursors may be on different DB */ + if (m3->mc_pg[0] != mp) + continue; + /* root split */ + for (k = foliage; k >= 0; k--) { + m3->mc_ki[k + 1] = m3->mc_ki[k]; + m3->mc_pg[k + 1] = m3->mc_pg[k]; + } + m3->mc_ki[0] = (m3->mc_ki[0] >= nkeys) ? 1 : 0; + m3->mc_pg[0] = mc->mc_pg[0]; + m3->mc_snum++; + m3->mc_top++; + } + if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) { + if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDBX_SPLIT_REPLACE)) + m3->mc_ki[mc->mc_top]++; + if (m3->mc_ki[mc->mc_top] >= nkeys) { + m3->mc_pg[mc->mc_top] = rp; + mdbx_cassert(mc, m3->mc_ki[mc->mc_top] >= nkeys); + m3->mc_ki[mc->mc_top] -= (indx_t)nkeys; + for (i = 0; i < mc->mc_top; i++) { + m3->mc_ki[i] = mn.mc_ki[i]; + m3->mc_pg[i] = mn.mc_pg[i]; + } + } + } else if (!did_split && m3->mc_top >= ptop && + m3->mc_pg[ptop] == mc->mc_pg[ptop] && + m3->mc_ki[ptop] >= mc->mc_ki[ptop]) { + m3->mc_ki[ptop]++; + } + if (XCURSOR_INITED(m3) && IS_LEAF(mp)) + XCURSOR_REFRESH(m3, m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]); + } + } + mdbx_debug("mp left: %d, rp left: %d", page_room(mp), page_room(rp)); + +done: + if (copy) /* tmp page */ + mdbx_dpage_free(env, copy, 1); + if (unlikely(rc)) + mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; + return rc; +} + +int mdbx_put(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, MDBX_val *data, + unsigned flags) { + int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!key || !data)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(flags & ~(MDBX_NOOVERWRITE | MDBX_NODUPDATA | MDBX_RESERVE | + MDBX_APPEND | MDBX_APPENDDUP | MDBX_CURRENT))) + return MDBX_EINVAL; + + if (unlikely(txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) + return (txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; + + MDBX_cursor_couple cx; + rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + cx.outer.mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = &cx.outer; + + /* LY: support for update (explicit overwrite) */ + if (flags & MDBX_CURRENT) { + rc = mdbx_cursor_get(&cx.outer, (MDBX_val *)key, NULL, MDBX_SET); + if (likely(rc == MDBX_SUCCESS) && + (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT)) { + /* LY: allows update (explicit overwrite) only for unique keys */ + MDBX_node *node = page_node(cx.outer.mc_pg[cx.outer.mc_top], + cx.outer.mc_ki[cx.outer.mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + mdbx_tassert(txn, XCURSOR_INITED(&cx.outer) && + cx.outer.mc_xcursor->mx_db.md_entries > 1); + rc = MDBX_EMULTIVAL; + } + } + } + + if (likely(rc == MDBX_SUCCESS)) + rc = mdbx_cursor_put(&cx.outer, key, data, flags); + txn->mt_cursors[dbi] = cx.outer.mc_next; + + return rc; +} + +/**** COPYING *****************************************************************/ + +#ifndef MDBX_WBUF +#define MDBX_WBUF ((size_t)1024 * 1024) +#endif +#define MDBX_EOF 0x10 /* mdbx_env_copyfd1() is done reading */ + +/* State needed for a double-buffering compacting copy. */ +typedef struct mdbx_copy { + MDBX_env *mc_env; + MDBX_txn *mc_txn; + mdbx_condmutex_t mc_condmutex; + uint8_t *mc_wbuf[2]; + uint8_t *mc_over[2]; + size_t mc_wlen[2]; + size_t mc_olen[2]; + mdbx_filehandle_t mc_fd; + volatile int mc_error; + pgno_t mc_next_pgno; + short mc_toggle; /* Buffer number in provider */ + short mc_new; /* (0-2 buffers to write) | (MDBX_EOF at end) */ + /* Error code. Never cleared if set. Both threads can set nonzero + * to fail the copy. Not mutex-protected, MDBX expects atomic int. */ +} mdbx_copy; + +/* Dedicated writer thread for compacting copy. */ +static THREAD_RESULT __cold THREAD_CALL mdbx_env_copythr(void *arg) { + mdbx_copy *my = arg; + uint8_t *ptr; + int toggle = 0; + + mdbx_condmutex_lock(&my->mc_condmutex); + while (!my->mc_error) { + while (!my->mc_new && !my->mc_error) { + int err = mdbx_condmutex_wait(&my->mc_condmutex); + if (err != MDBX_SUCCESS) { + my->mc_error = err; + goto bailout; + } + } + if (my->mc_new == 0 + MDBX_EOF) /* 0 buffers, just EOF */ + break; + size_t wsize = my->mc_wlen[toggle]; + ptr = my->mc_wbuf[toggle]; + again: + if (wsize > 0 && !my->mc_error) { + int err = mdbx_write(my->mc_fd, ptr, wsize); + if (err != MDBX_SUCCESS) { + my->mc_error = err; + goto bailout; + } + } + + /* If there's an overflow page tail, write it too */ + if (my->mc_olen[toggle]) { + wsize = my->mc_olen[toggle]; + ptr = my->mc_over[toggle]; + my->mc_olen[toggle] = 0; + goto again; + } + my->mc_wlen[toggle] = 0; + toggle ^= 1; + /* Return the empty buffer to provider */ + my->mc_new--; + mdbx_condmutex_signal(&my->mc_condmutex); + } +bailout: + mdbx_condmutex_unlock(&my->mc_condmutex); + return (THREAD_RESULT)0; +} + +/* Give buffer and/or MDBX_EOF to writer thread, await unused buffer. + * + * [in] my control structure. + * [in] adjust (1 to hand off 1 buffer) | (MDBX_EOF when ending). */ +static int __cold mdbx_env_cthr_toggle(mdbx_copy *my, int adjust) { + mdbx_condmutex_lock(&my->mc_condmutex); + my->mc_new += (short)adjust; + mdbx_condmutex_signal(&my->mc_condmutex); + while (!my->mc_error && (my->mc_new & 2) /* both buffers in use */) { + int err = mdbx_condmutex_wait(&my->mc_condmutex); + if (err != MDBX_SUCCESS) + my->mc_error = err; + } + mdbx_condmutex_unlock(&my->mc_condmutex); + + my->mc_toggle ^= (adjust & 1); + /* Both threads reset mc_wlen, to be safe from threading errors */ + my->mc_wlen[my->mc_toggle] = 0; + return my->mc_error; +} + +/* Depth-first tree traversal for compacting copy. + * [in] my control structure. + * [in,out] pg database root. + * [in] flags includes F_DUPDATA if it is a sorted-duplicate sub-DB. */ +static int __cold mdbx_env_cwalk(mdbx_copy *my, pgno_t *pg, int flags) { + MDBX_cursor mc; + MDBX_page *mo, *mp, *leaf; + char *buf, *ptr; + int rc, toggle; + unsigned i; + + /* Empty DB, nothing to do */ + if (*pg == P_INVALID) + return MDBX_SUCCESS; + + memset(&mc, 0, sizeof(mc)); + mc.mc_snum = 1; + mc.mc_txn = my->mc_txn; + + rc = mdbx_page_get(&mc, *pg, &mc.mc_pg[0], NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_page_search_root(&mc, NULL, MDBX_PS_FIRST); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + /* Make cursor pages writable */ + buf = ptr = mdbx_malloc(pgno2bytes(my->mc_env, mc.mc_snum)); + if (buf == NULL) + return MDBX_ENOMEM; + + for (i = 0; i < mc.mc_top; i++) { + mdbx_page_copy((MDBX_page *)ptr, mc.mc_pg[i], my->mc_env->me_psize); + mc.mc_pg[i] = (MDBX_page *)ptr; + ptr += my->mc_env->me_psize; + } + + /* This is writable space for a leaf page. Usually not needed. */ + leaf = (MDBX_page *)ptr; + + toggle = my->mc_toggle; + while (mc.mc_snum > 0) { + unsigned n; + mp = mc.mc_pg[mc.mc_top]; + n = page_numkeys(mp); + + if (IS_LEAF(mp)) { + if (!IS_LEAF2(mp) && !(flags & F_DUPDATA)) { + for (i = 0; i < n; i++) { + MDBX_node *node = page_node(mp, i); + if (node_flags(node) & F_BIGDATA) { + MDBX_page *omp; + + /* Need writable leaf */ + if (mp != leaf) { + mc.mc_pg[mc.mc_top] = leaf; + mdbx_page_copy(leaf, mp, my->mc_env->me_psize); + mp = leaf; + node = page_node(mp, i); + } + + const pgno_t pgno = node_largedata_pgno(node); + poke_pgno(node_data(node), my->mc_next_pgno); + rc = mdbx_page_get(&mc, pgno, &omp, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + if (my->mc_wlen[toggle] >= MDBX_WBUF) { + rc = mdbx_env_cthr_toggle(my, 1); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + toggle = my->mc_toggle; + } + mo = (MDBX_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); + memcpy(mo, omp, my->mc_env->me_psize); + mo->mp_pgno = my->mc_next_pgno; + mo->mp_txnid = MIN_TXNID; + my->mc_next_pgno += omp->mp_pages; + my->mc_wlen[toggle] += my->mc_env->me_psize; + if (omp->mp_pages > 1) { + my->mc_olen[toggle] = pgno2bytes(my->mc_env, omp->mp_pages - 1); + my->mc_over[toggle] = (uint8_t *)omp + my->mc_env->me_psize; + rc = mdbx_env_cthr_toggle(my, 1); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + toggle = my->mc_toggle; + } + } else if (node_flags(node) & F_SUBDATA) { + if (node_ds(node) < sizeof(MDBX_db)) { + rc = MDBX_CORRUPTED; + goto done; + } + + /* Need writable leaf */ + if (mp != leaf) { + mc.mc_pg[mc.mc_top] = leaf; + mdbx_page_copy(leaf, mp, my->mc_env->me_psize); + mp = leaf; + node = page_node(mp, i); + } + + MDBX_db db; + memcpy(&db, node_data(node), sizeof(MDBX_db)); + my->mc_toggle = (short)toggle; + rc = mdbx_env_cwalk(my, &db.md_root, node_flags(node) & F_DUPDATA); + if (rc) + goto done; + toggle = my->mc_toggle; + memcpy(node_data(node), &db, sizeof(MDBX_db)); + } + } + } + } else { + mc.mc_ki[mc.mc_top]++; + if (mc.mc_ki[mc.mc_top] < n) { + again: + rc = mdbx_page_get(&mc, node_pgno(page_node(mp, mc.mc_ki[mc.mc_top])), + &mp, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + mc.mc_top++; + mc.mc_snum++; + mc.mc_ki[mc.mc_top] = 0; + if (IS_BRANCH(mp)) { + /* Whenever we advance to a sibling branch page, + * we must proceed all the way down to its first leaf. */ + mdbx_page_copy(mc.mc_pg[mc.mc_top], mp, my->mc_env->me_psize); + goto again; + } else + mc.mc_pg[mc.mc_top] = mp; + continue; + } + } + if (my->mc_wlen[toggle] >= MDBX_WBUF) { + rc = mdbx_env_cthr_toggle(my, 1); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + toggle = my->mc_toggle; + } + mo = (MDBX_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); + mdbx_page_copy(mo, mp, my->mc_env->me_psize); + mo->mp_txnid = MIN_TXNID; + mo->mp_pgno = my->mc_next_pgno++; + my->mc_wlen[toggle] += my->mc_env->me_psize; + if (mc.mc_top) { + /* Update parent if there is one */ + node_set_pgno(page_node(mc.mc_pg[mc.mc_top - 1], mc.mc_ki[mc.mc_top - 1]), + mo->mp_pgno); + mdbx_cursor_pop(&mc); + } else { + /* Otherwise we're done */ + *pg = mo->mp_pgno; + break; + } + } +done: + mdbx_free(buf); + return rc; +} + +static __cold void compact_fixup_meta(MDBX_env *env, MDBX_meta *meta) { + /* Calculate filesize taking in account shrink/growing thresholds */ + if (meta->mm_geo.next > meta->mm_geo.now) { + const pgno_t aligned = pgno_align2os_pgno( + env, + pgno_add(meta->mm_geo.next, + meta->mm_geo.grow - meta->mm_geo.next % meta->mm_geo.grow)); + meta->mm_geo.now = aligned; + } else if (meta->mm_geo.next < meta->mm_geo.now) { + meta->mm_geo.now = meta->mm_geo.next; + const pgno_t aligner = + meta->mm_geo.grow ? meta->mm_geo.grow : meta->mm_geo.shrink; + const pgno_t aligned = pgno_align2os_pgno( + env, meta->mm_geo.next + aligner - meta->mm_geo.next % aligner); + meta->mm_geo.now = aligned; + } + + if (meta->mm_geo.now < meta->mm_geo.lower) + meta->mm_geo.now = meta->mm_geo.lower; + if (meta->mm_geo.now > meta->mm_geo.upper) + meta->mm_geo.now = meta->mm_geo.upper; + + /* Update signature */ + assert(meta->mm_geo.now >= meta->mm_geo.next); + meta->mm_datasync_sign = mdbx_meta_sign(meta); +} + +/* Copy environment with compaction. */ +static int __cold mdbx_env_compact(MDBX_env *env, MDBX_txn *read_txn, + mdbx_filehandle_t fd, uint8_t *buffer, + const bool dest_is_pipe) { + const size_t meta_bytes = pgno2bytes(env, NUM_METAS); + uint8_t *const data_buffer = + buffer + ceil_powerof2(meta_bytes, env->me_os_psize); + MDBX_meta *const meta = mdbx_init_metas(env, buffer); + /* copy canary sequenses if present */ + if (read_txn->mt_canary.v) { + meta->mm_canary = read_txn->mt_canary; + meta->mm_canary.v = mdbx_meta_txnid_stable(env, meta); + } + + /* Set metapage 1 with current main DB */ + pgno_t new_root, root = read_txn->mt_dbs[MAIN_DBI].md_root; + if ((new_root = root) == P_INVALID) { + /* When the DB is empty, handle it specially to + * fix any breakage like page leaks from ITS#8174. */ + meta->mm_dbs[MAIN_DBI].md_flags = read_txn->mt_dbs[MAIN_DBI].md_flags; + compact_fixup_meta(env, meta); + if (dest_is_pipe) { + int rc = mdbx_write(fd, buffer, meta_bytes); + if (rc != MDBX_SUCCESS) + return rc; + } + } else { + /* Count free pages + GC pages. Subtract from last_pg + * to find the new last_pg, which also becomes the new root. */ + pgno_t freecount = 0; + MDBX_cursor mc; + MDBX_val key, data; + + int rc = mdbx_cursor_init(&mc, read_txn, FREE_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + while ((rc = mdbx_cursor_get(&mc, &key, &data, MDBX_NEXT)) == 0) + freecount += *(pgno_t *)data.iov_base; + if (unlikely(rc != MDBX_NOTFOUND)) + return rc; + + freecount += read_txn->mt_dbs[FREE_DBI].md_branch_pages + + read_txn->mt_dbs[FREE_DBI].md_leaf_pages + + read_txn->mt_dbs[FREE_DBI].md_overflow_pages; + + new_root = read_txn->mt_next_pgno - 1 - freecount; + meta->mm_geo.next = new_root + 1; + meta->mm_dbs[MAIN_DBI] = read_txn->mt_dbs[MAIN_DBI]; + meta->mm_dbs[MAIN_DBI].md_root = new_root; + + mdbx_copy ctx; + memset(&ctx, 0, sizeof(ctx)); + rc = mdbx_condmutex_init(&ctx.mc_condmutex); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + memset(data_buffer, 0, MDBX_WBUF * 2); + ctx.mc_wbuf[0] = data_buffer; + ctx.mc_wbuf[1] = data_buffer + MDBX_WBUF; + ctx.mc_next_pgno = NUM_METAS; + ctx.mc_env = env; + ctx.mc_fd = fd; + ctx.mc_txn = read_txn; + + mdbx_thread_t thread; + int thread_err = mdbx_thread_create(&thread, mdbx_env_copythr, &ctx); + if (likely(thread_err == MDBX_SUCCESS)) { + if (dest_is_pipe) { + compact_fixup_meta(env, meta); + rc = mdbx_write(fd, buffer, meta_bytes); + } + if (rc == MDBX_SUCCESS) + rc = mdbx_env_cwalk(&ctx, &root, 0); + mdbx_env_cthr_toggle(&ctx, 1 | MDBX_EOF); + thread_err = mdbx_thread_join(thread); + mdbx_condmutex_destroy(&ctx.mc_condmutex); + } + if (unlikely(thread_err != MDBX_SUCCESS)) + return thread_err; + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + if (unlikely(ctx.mc_error != MDBX_SUCCESS)) + return ctx.mc_error; + + if (dest_is_pipe) { + if (root != new_root) { + mdbx_error("post-compactification root %" PRIaPGNO + " NE expected %" PRIaPGNO + " (source DB corrupted or has a page leak(s))", + root, new_root); + return MDBX_CORRUPTED; /* page leak or corrupt DB */ + } + } else { + if (root > new_root) { + mdbx_error("post-compactification root %" PRIaPGNO + " GT expected %" PRIaPGNO " (source DB corrupted)", + root, new_root); + return MDBX_CORRUPTED; /* page leak or corrupt DB */ + } + if (root < new_root) { + mdbx_notice("post-compactification root %" PRIaPGNO + " LT expected %" PRIaPGNO " (page leak(s) in source DB)", + root, new_root); + /* fixup meta */ + meta->mm_dbs[MAIN_DBI].md_root = root; + meta->mm_geo.next = root + 1; + } + compact_fixup_meta(env, meta); + } + } + + /* Extend file if required */ + if (meta->mm_geo.now != meta->mm_geo.next) { + const size_t whole_size = pgno2bytes(env, meta->mm_geo.now); + if (!dest_is_pipe) + return mdbx_ftruncate(fd, whole_size); + + const size_t used_size = pgno2bytes(env, meta->mm_geo.next); + memset(data_buffer, 0, MDBX_WBUF); + for (size_t offset = used_size; offset < whole_size;) { + const size_t chunk = + (MDBX_WBUF < whole_size - offset) ? MDBX_WBUF : whole_size - offset; + /* copy to avoit EFAULT in case swapped-out */ + int rc = mdbx_write(fd, data_buffer, chunk); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + offset += chunk; + } + } + return MDBX_SUCCESS; +} + +/* Copy environment as-is. */ +static int __cold mdbx_env_copy_asis(MDBX_env *env, MDBX_txn *read_txn, + mdbx_filehandle_t fd, uint8_t *buffer, + const bool dest_is_pipe) { + /* We must start the actual read txn after blocking writers */ + int rc = mdbx_txn_end(read_txn, MDBX_END_RESET_TMP); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + /* Temporarily block writers until we snapshot the meta pages */ + rc = mdbx_txn_lock(env, false); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + rc = mdbx_txn_renew0(read_txn, MDBX_RDONLY); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_txn_unlock(env); + return rc; + } + + mdbx_jitter4testing(false); + const size_t meta_bytes = pgno2bytes(env, NUM_METAS); + /* Make a snapshot of meta-pages, + * but writing ones after the data was flushed */ + memcpy(buffer, env->me_map, meta_bytes); + MDBX_meta *const headcopy = /* LY: get pointer to the spanshot copy */ + (MDBX_meta *)(buffer + ((uint8_t *)mdbx_meta_head(env) - env->me_map)); + /* Update signature to steady */ + headcopy->mm_datasync_sign = mdbx_meta_sign(headcopy); + mdbx_txn_unlock(env); + + /* Copy the data */ + const size_t whole_size = pgno_align2os_bytes(env, read_txn->mt_end_pgno); + const size_t used_size = pgno2bytes(env, read_txn->mt_next_pgno); + mdbx_jitter4testing(false); + + if (dest_is_pipe) + rc = mdbx_write(fd, buffer, meta_bytes); + + uint8_t *const data_buffer = + buffer + ceil_powerof2(meta_bytes, env->me_os_psize); + for (size_t offset = meta_bytes; rc == MDBX_SUCCESS && offset < used_size;) { + if (dest_is_pipe) { +#if (defined(__linux__) || defined(__gnu_linux__)) && \ + (!defined(__ANDROID_API__) || __ANDROID_API__ >= 21) && \ + !defined(MDBX_SAFE4QEMU) + off_t in_offset = offset; + const intptr_t written = + sendfile(fd, env->me_lazy_fd, &in_offset, used_size - offset); + if (unlikely(written <= 0)) { + rc = written ? errno : MDBX_ENODATA; + break; + } + offset = in_offset; + continue; +#endif + } else { +#if __GLIBC_PREREQ(2, 27) && defined(_GNU_SOURCE) && !defined(MDBX_SAFE4QEMU) + off_t in_offset = offset, out_offset = offset; + ssize_t bytes_copied = copy_file_range( + env->me_lazy_fd, &in_offset, fd, &out_offset, used_size - offset, 0); + if (unlikely(bytes_copied <= 0)) { + rc = bytes_copied ? errno : MDBX_ENODATA; + break; + } + offset = in_offset; + continue; +#endif + } + + /* fallback to portable */ + const size_t chunk = + (MDBX_WBUF < used_size - offset) ? MDBX_WBUF : used_size - offset; + /* copy to avoit EFAULT in case swapped-out */ + memcpy(data_buffer, env->me_map + offset, chunk); + rc = mdbx_write(fd, data_buffer, chunk); + offset += chunk; + } + + /* Extend file if required */ + if (likely(rc == MDBX_SUCCESS) && whole_size != used_size) { + if (!dest_is_pipe) + rc = mdbx_ftruncate(fd, whole_size); + else { + memset(data_buffer, 0, MDBX_WBUF); + for (size_t offset = used_size; + rc == MDBX_SUCCESS && offset < whole_size;) { + const size_t chunk = + (MDBX_WBUF < whole_size - offset) ? MDBX_WBUF : whole_size - offset; + /* copy to avoit EFAULT in case swapped-out */ + rc = mdbx_write(fd, data_buffer, chunk); + offset += chunk; + } + } + } + + return rc; +} + +int __cold mdbx_env_copy2fd(MDBX_env *env, mdbx_filehandle_t fd, + unsigned flags) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + const int dest_is_pipe = mdbx_is_pipe(fd); + if (MDBX_IS_ERROR(dest_is_pipe)) + return dest_is_pipe; + + if (!dest_is_pipe) { + int rc = mdbx_fseek(fd, 0); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + const size_t buffer_size = + pgno_align2os_bytes(env, NUM_METAS) + + ceil_powerof2(((flags & MDBX_CP_COMPACT) ? MDBX_WBUF * 2 : MDBX_WBUF), + env->me_os_psize); + + uint8_t *buffer = NULL; + int rc = mdbx_memalign_alloc(env->me_os_psize, buffer_size, (void **)&buffer); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + MDBX_txn *read_txn = NULL; + /* Do the lock/unlock of the reader mutex before starting the + * write txn. Otherwise other read txns could block writers. */ + rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &read_txn); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_memalign_free(buffer); + return rc; + } + + if (!dest_is_pipe) { + /* Firstly write a stub to meta-pages. + * Now we sure to incomplete copy will not be used. */ + memset(buffer, -1, pgno2bytes(env, NUM_METAS)); + rc = mdbx_write(fd, buffer, pgno2bytes(env, NUM_METAS)); + } + + if (likely(rc == MDBX_SUCCESS)) { + memset(buffer, 0, pgno2bytes(env, NUM_METAS)); + rc = (flags & MDBX_CP_COMPACT) + ? mdbx_env_compact(env, read_txn, fd, buffer, dest_is_pipe) + : mdbx_env_copy_asis(env, read_txn, fd, buffer, dest_is_pipe); + } + mdbx_txn_abort(read_txn); + + if (!dest_is_pipe) { + if (likely(rc == MDBX_SUCCESS)) + rc = mdbx_filesync(fd, MDBX_SYNC_DATA | MDBX_SYNC_SIZE); + + /* Write actual meta */ + if (likely(rc == MDBX_SUCCESS)) + rc = mdbx_pwrite(fd, buffer, pgno2bytes(env, NUM_METAS), 0); + + if (likely(rc == MDBX_SUCCESS)) + rc = mdbx_filesync(fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); + } + + mdbx_memalign_free(buffer); + return rc; +} + +int __cold mdbx_env_copy(MDBX_env *env, const char *dest_path, unsigned flags) { + if (unlikely(!env || !dest_path)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + /* The destination path must exist, but the destination file must not. + * We don't want the OS to cache the writes, since the source data is + * already in the OS cache. */ + mdbx_filehandle_t newfd; + int rc = mdbx_openfile(MDBX_OPEN_COPY, env, dest_path, &newfd, +#if defined(_WIN32) || defined(_WIN64) + (mode_t)-1 +#else + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP +#endif + ); + if (rc == MDBX_SUCCESS) + rc = mdbx_env_copy2fd(env, newfd, flags); + + if (newfd != INVALID_HANDLE_VALUE) { + int err = mdbx_closefile(newfd); + if (rc == MDBX_SUCCESS && err != rc) + rc = err; + if (rc != MDBX_SUCCESS) + (void)mdbx_removefile(dest_path); + } + + return rc; +} + +/******************************************************************************/ + +int __cold mdbx_env_set_flags(MDBX_env *env, unsigned flags, int onoff) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(flags & ~CHANGEABLE)) + return MDBX_EPERM; + + if (unlikely(env->me_flags & MDBX_RDONLY)) + return MDBX_EACCESS; + + if (unlikely(env->me_txn0->mt_owner == mdbx_thread_self())) + return MDBX_BUSY; + + int rc = mdbx_txn_lock(env, false); + if (unlikely(rc)) + return rc; + + if (onoff) + env->me_flags |= flags; + else + env->me_flags &= ~flags; + + mdbx_txn_unlock(env); + return MDBX_SUCCESS; +} + +int __cold mdbx_env_get_flags(const MDBX_env *env, unsigned *arg) { + if (unlikely(!env || !arg)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + *arg = env->me_flags & (CHANGEABLE | CHANGELESS); + return MDBX_SUCCESS; +} + +int __cold mdbx_env_set_userctx(MDBX_env *env, void *ctx) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + env->me_userctx = ctx; + return MDBX_SUCCESS; +} + +void *__cold mdbx_env_get_userctx(const MDBX_env *env) { + return env ? env->me_userctx : NULL; +} + +int __cold mdbx_env_set_assert(MDBX_env *env, MDBX_assert_func *func) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + +#if MDBX_DEBUG + env->me_assert_func = func; + return MDBX_SUCCESS; +#else + (void)func; + return MDBX_ENOSYS; +#endif +} + +int __cold mdbx_env_get_path(const MDBX_env *env, const char **arg) { + if (unlikely(!env || !arg)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + *arg = env->me_path; + return MDBX_SUCCESS; +} + +int __cold mdbx_env_get_fd(const MDBX_env *env, mdbx_filehandle_t *arg) { + if (unlikely(!env || !arg)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + *arg = env->me_lazy_fd; + return MDBX_SUCCESS; +} + +/* Common code for mdbx_dbi_stat() and mdbx_env_stat(). + * [in] env the environment to operate in. + * [in] db the MDBX_db record containing the stats to return. + * [out] arg the address of an MDBX_stat structure to receive the stats. + * Returns 0, this function always succeeds. */ +static void mdbx_stat0(const MDBX_env *env, const MDBX_db *db, MDBX_stat *dest, + size_t bytes) { + dest->ms_psize = env->me_psize; + dest->ms_depth = db->md_depth; + dest->ms_branch_pages = db->md_branch_pages; + dest->ms_leaf_pages = db->md_leaf_pages; + dest->ms_overflow_pages = db->md_overflow_pages; + dest->ms_entries = db->md_entries; + if (likely(bytes >= + offsetof(MDBX_stat, ms_mod_txnid) + sizeof(dest->ms_mod_txnid))) + dest->ms_mod_txnid = db->md_mod_txnid; +} + +int __cold mdbx_env_stat(MDBX_env *env, MDBX_stat *dest, size_t bytes) { + return mdbx_env_stat_ex(env, NULL, dest, bytes); +} + +int __cold mdbx_env_stat_ex(const MDBX_env *env, const MDBX_txn *txn, + MDBX_stat *dest, size_t bytes) { + if (unlikely((env == NULL && txn == NULL) || dest == NULL)) + return MDBX_EINVAL; + + if (txn) { + int err = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + if (env) { + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + if (txn && unlikely(txn->mt_env != env)) + return MDBX_EINVAL; + } + + const size_t size_before_modtxnid = offsetof(MDBX_stat, ms_mod_txnid); + if (unlikely(bytes != sizeof(MDBX_stat)) && bytes != size_before_modtxnid) + return MDBX_EINVAL; + + if (txn) { + mdbx_stat0(txn->mt_env, &txn->mt_dbs[MAIN_DBI], dest, bytes); + return MDBX_SUCCESS; + } + + while (1) { + const MDBX_meta *const recent_meta = mdbx_meta_head(env); + const txnid_t txnid = mdbx_meta_txnid_fluid(env, recent_meta); + mdbx_stat0(env, &recent_meta->mm_dbs[MAIN_DBI], dest, bytes); + mdbx_compiler_barrier(); + if (likely(txnid == mdbx_meta_txnid_fluid(env, recent_meta) && + recent_meta == mdbx_meta_head(env))) + return MDBX_SUCCESS; + } +} + +int __cold mdbx_env_info(MDBX_env *env, MDBX_envinfo *arg, size_t bytes) { + return mdbx_env_info_ex(env, NULL, arg, bytes); +} + +int __cold mdbx_env_info_ex(const MDBX_env *env, const MDBX_txn *txn, + MDBX_envinfo *arg, size_t bytes) { + if (unlikely((env == NULL && txn == NULL) || arg == NULL)) + return MDBX_EINVAL; + + if (txn) { + int err = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(err != MDBX_SUCCESS)) + return err; + } + if (env) { + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + if (txn && unlikely(txn->mt_env != env)) + return MDBX_EINVAL; + } else { + env = txn->mt_env; + } + + const size_t size_before_bootid = offsetof(MDBX_envinfo, mi_bootid); + if (unlikely(bytes != sizeof(MDBX_envinfo)) && bytes != size_before_bootid) + return MDBX_EINVAL; + + const MDBX_meta *const meta0 = METAPAGE(env, 0); + const MDBX_meta *const meta1 = METAPAGE(env, 1); + const MDBX_meta *const meta2 = METAPAGE(env, 2); + pgno_t unsynced_pages; + while (1) { + if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) + return MDBX_PANIC; + + const MDBX_meta *const recent_meta = mdbx_meta_head(env); + arg->mi_recent_txnid = mdbx_meta_txnid_fluid(env, recent_meta); + arg->mi_meta0_txnid = mdbx_meta_txnid_fluid(env, meta0); + arg->mi_meta0_sign = meta0->mm_datasync_sign; + arg->mi_meta1_txnid = mdbx_meta_txnid_fluid(env, meta1); + arg->mi_meta1_sign = meta1->mm_datasync_sign; + arg->mi_meta2_txnid = mdbx_meta_txnid_fluid(env, meta2); + arg->mi_meta2_sign = meta2->mm_datasync_sign; + if (likely(bytes > size_before_bootid)) { + arg->mi_bootid.meta0.l = meta0->mm_bootid.x; + arg->mi_bootid.meta1.l = meta0->mm_bootid.x; + arg->mi_bootid.meta2.l = meta0->mm_bootid.x; + arg->mi_bootid.meta0.h = meta0->mm_bootid.y; + arg->mi_bootid.meta1.h = meta0->mm_bootid.y; + arg->mi_bootid.meta2.h = meta0->mm_bootid.y; + } + + const MDBX_meta *txn_meta = recent_meta; + arg->mi_last_pgno = txn_meta->mm_geo.next - 1; + arg->mi_geo.current = pgno2bytes(env, txn_meta->mm_geo.now); + if (txn) { + arg->mi_last_pgno = txn->mt_next_pgno - 1; + arg->mi_geo.current = pgno2bytes(env, txn->mt_end_pgno); + + const txnid_t wanna_meta_txnid = (txn->mt_flags & MDBX_RDONLY) + ? txn->mt_txnid + : txn->mt_txnid - MDBX_TXNID_STEP; + txn_meta = (arg->mi_meta0_txnid == wanna_meta_txnid) ? meta0 : txn_meta; + txn_meta = (arg->mi_meta1_txnid == wanna_meta_txnid) ? meta1 : txn_meta; + txn_meta = (arg->mi_meta2_txnid == wanna_meta_txnid) ? meta2 : txn_meta; + } + arg->mi_geo.lower = pgno2bytes(env, txn_meta->mm_geo.lower); + arg->mi_geo.upper = pgno2bytes(env, txn_meta->mm_geo.upper); + arg->mi_geo.shrink = pgno2bytes(env, txn_meta->mm_geo.shrink); + arg->mi_geo.grow = pgno2bytes(env, txn_meta->mm_geo.grow); + unsynced_pages = *env->me_unsynced_pages + + (*env->me_meta_sync_txnid != (uint32_t)arg->mi_last_pgno); + + arg->mi_mapsize = env->me_dxb_mmap.limit; + mdbx_compiler_barrier(); + if (likely(arg->mi_meta0_txnid == mdbx_meta_txnid_fluid(env, meta0) && + arg->mi_meta0_sign == meta0->mm_datasync_sign && + arg->mi_meta1_txnid == mdbx_meta_txnid_fluid(env, meta1) && + arg->mi_meta1_sign == meta1->mm_datasync_sign && + arg->mi_meta2_txnid == mdbx_meta_txnid_fluid(env, meta2) && + arg->mi_meta2_sign == meta2->mm_datasync_sign && + recent_meta == mdbx_meta_head(env) && + arg->mi_recent_txnid == mdbx_meta_txnid_fluid(env, recent_meta))) + break; + } + + arg->mi_maxreaders = env->me_maxreaders; + arg->mi_numreaders = env->me_lck ? env->me_lck->mti_numreaders : INT32_MAX; + arg->mi_dxb_pagesize = env->me_psize; + arg->mi_sys_pagesize = env->me_os_psize; + + const MDBX_lockinfo *const lck = env->me_lck; + if (likely(bytes > size_before_bootid)) { + arg->mi_unsync_volume = pgno2bytes(env, unsynced_pages); + const uint64_t monotime_now = mdbx_osal_monotime(); + arg->mi_since_sync_seconds16dot16 = + mdbx_osal_monotime_to_16dot16(monotime_now - *env->me_sync_timestamp); + arg->mi_since_reader_check_seconds16dot16 = + lck ? mdbx_osal_monotime_to_16dot16(monotime_now - + lck->mti_reader_check_timestamp) + : 0; + arg->mi_autosync_threshold = pgno2bytes(env, *env->me_autosync_threshold); + arg->mi_autosync_period_seconds16dot16 = + mdbx_osal_monotime_to_16dot16(*env->me_autosync_period); + arg->mi_bootid.current.l = bootid.x; + arg->mi_bootid.current.h = bootid.y; + arg->mi_mode = lck ? lck->mti_envmode : env->me_flags; + } + + arg->mi_self_latter_reader_txnid = arg->mi_latter_reader_txnid = 0; + if (lck) { + arg->mi_self_latter_reader_txnid = arg->mi_latter_reader_txnid = + arg->mi_recent_txnid; + for (unsigned i = 0; i < arg->mi_numreaders; ++i) { + const uint32_t pid = lck->mti_readers[i].mr_pid; + if (pid) { + const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid); + if (arg->mi_latter_reader_txnid > txnid) + arg->mi_latter_reader_txnid = txnid; + if (pid == env->me_pid && arg->mi_self_latter_reader_txnid > txnid) + arg->mi_self_latter_reader_txnid = txnid; + } + } + } + + return MDBX_SUCCESS; +} + +static MDBX_cmp_func *mdbx_default_keycmp(unsigned flags) { + return (flags & MDBX_REVERSEKEY) + ? mdbx_cmp_memnr + : (flags & MDBX_INTEGERKEY) ? mdbx_cmp_int_align2 : mdbx_cmp_memn; +} + +static MDBX_cmp_func *mdbx_default_datacmp(unsigned flags) { + return !(flags & MDBX_DUPSORT) + ? mdbx_cmp_memn + : ((flags & MDBX_INTEGERDUP) + ? mdbx_cmp_int_unaligned + : ((flags & MDBX_REVERSEDUP) ? mdbx_cmp_memnr + : mdbx_cmp_memn)); +} + +static int mdbx_dbi_bind(MDBX_txn *txn, const MDBX_dbi dbi, unsigned user_flags, + MDBX_cmp_func *keycmp, MDBX_cmp_func *datacmp) { + /* LY: so, accepting only three cases for the table's flags: + * 1) user_flags and both comparators are zero + * = assume that a by-default mode/flags is requested for reading; + * 2) user_flags exactly the same + * = assume that the target mode/flags are requested properly; + * 3) user_flags differs, but table is empty and MDBX_CREATE is provided + * = assume that a properly create request with custom flags; + */ + if ((user_flags ^ txn->mt_dbs[dbi].md_flags) & PERSISTENT_FLAGS) { + /* flags ara differs, check other conditions */ + if (!user_flags && (!keycmp || keycmp == txn->mt_dbxs[dbi].md_cmp) && + (!datacmp || datacmp == txn->mt_dbxs[dbi].md_dcmp)) { + /* no comparators were provided and flags are zero, + * seems that is case #1 above */ + user_flags = txn->mt_dbs[dbi].md_flags; + } else if ((user_flags & MDBX_CREATE) && txn->mt_dbs[dbi].md_entries == 0) { + if (txn->mt_flags & MDBX_RDONLY) + return /* FIXME: return extended info */ MDBX_EACCESS; + /* make sure flags changes get committed */ + txn->mt_dbs[dbi].md_flags = user_flags & PERSISTENT_FLAGS; + txn->mt_flags |= MDBX_TXN_DIRTY; + } else { + return /* FIXME: return extended info */ MDBX_INCOMPATIBLE; + } + } + + if (!keycmp) + keycmp = txn->mt_dbxs[dbi].md_cmp ? txn->mt_dbxs[dbi].md_cmp + : mdbx_default_keycmp(user_flags); + if (txn->mt_dbxs[dbi].md_cmp != keycmp) { + if (txn->mt_dbxs[dbi].md_cmp) + return MDBX_EINVAL; + txn->mt_dbxs[dbi].md_cmp = keycmp; + } + + if (!datacmp) + datacmp = txn->mt_dbxs[dbi].md_dcmp ? txn->mt_dbxs[dbi].md_dcmp + : mdbx_default_datacmp(user_flags); + if (txn->mt_dbxs[dbi].md_dcmp != datacmp) { + if (txn->mt_dbxs[dbi].md_dcmp) + return MDBX_EINVAL; + txn->mt_dbxs[dbi].md_dcmp = datacmp; + } + + return MDBX_SUCCESS; +} + +int mdbx_dbi_open_ex(MDBX_txn *txn, const char *table_name, unsigned user_flags, + MDBX_dbi *dbi, MDBX_cmp_func *keycmp, + MDBX_cmp_func *datacmp) { + if (unlikely(!dbi || (user_flags & ~VALID_FLAGS) != 0)) + return MDBX_EINVAL; + *dbi = 0; + + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + switch (user_flags & + (MDBX_INTEGERDUP | MDBX_DUPFIXED | MDBX_DUPSORT | MDBX_REVERSEDUP)) { + default: + return MDBX_EINVAL; + case MDBX_DUPSORT: + case MDBX_DUPSORT | MDBX_REVERSEDUP: + case MDBX_DUPSORT | MDBX_DUPFIXED: + case MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_REVERSEDUP: + case MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP: + case MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP: + case 0: + break; + } + + /* main table? */ + if (!table_name) { + rc = mdbx_dbi_bind(txn, MAIN_DBI, user_flags, keycmp, datacmp); + if (likely(rc == MDBX_SUCCESS)) + *dbi = MAIN_DBI; + return rc; + } + + if (txn->mt_dbxs[MAIN_DBI].md_cmp == NULL) { + txn->mt_dbxs[MAIN_DBI].md_cmp = + mdbx_default_keycmp(txn->mt_dbs[MAIN_DBI].md_flags); + txn->mt_dbxs[MAIN_DBI].md_dcmp = + mdbx_default_datacmp(txn->mt_dbs[MAIN_DBI].md_flags); + } + + /* Is the DB already open? */ + size_t len = strlen(table_name); + MDBX_dbi scan, slot; + for (slot = scan = txn->mt_numdbs; --scan >= CORE_DBS;) { + if (!txn->mt_dbxs[scan].md_name.iov_len) { + /* Remember this free slot */ + slot = scan; + continue; + } + if (len == txn->mt_dbxs[scan].md_name.iov_len && + !strncmp(table_name, txn->mt_dbxs[scan].md_name.iov_base, len)) { + *dbi = scan; + return mdbx_dbi_bind(txn, scan, user_flags, keycmp, datacmp); + } + } + + /* Fail, if no free slot and max hit */ + MDBX_env *env = txn->mt_env; + if (unlikely(slot >= env->me_maxdbs)) + return MDBX_DBS_FULL; + + /* Cannot mix named table with some main-table flags */ + if (unlikely(txn->mt_dbs[MAIN_DBI].md_flags & + (MDBX_DUPSORT | MDBX_INTEGERKEY))) + return (user_flags & MDBX_CREATE) ? MDBX_INCOMPATIBLE : MDBX_NOTFOUND; + + /* Find the DB info */ + int exact = 0; + MDBX_val key, data; + key.iov_len = len; + key.iov_base = (void *)table_name; + MDBX_cursor mc; + rc = mdbx_cursor_init(&mc, txn, MAIN_DBI); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_cursor_set(&mc, &key, &data, MDBX_SET, &exact); + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc != MDBX_NOTFOUND || !(user_flags & MDBX_CREATE)) + return rc; + } else { + /* make sure this is actually a table */ + MDBX_node *node = page_node(mc.mc_pg[mc.mc_top], mc.mc_ki[mc.mc_top]); + if (unlikely((node_flags(node) & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA)) + return MDBX_INCOMPATIBLE; + if (unlikely(data.iov_len < sizeof(MDBX_db))) + return MDBX_CORRUPTED; + } + + if (rc != MDBX_SUCCESS && unlikely(txn->mt_flags & MDBX_RDONLY)) + return MDBX_EACCESS; + + /* Done here so we cannot fail after creating a new DB */ + char *namedup = mdbx_strdup(table_name); + if (unlikely(!namedup)) + return MDBX_ENOMEM; + + int err = mdbx_fastmutex_acquire(&env->me_dbi_lock); + if (unlikely(err != MDBX_SUCCESS)) { + mdbx_free(namedup); + return err; + } + + if (txn->mt_numdbs < env->me_numdbs) { + for (unsigned i = txn->mt_numdbs; i < env->me_numdbs; ++i) { + txn->mt_dbflags[i] = 0; + if (env->me_dbflags[i] & MDBX_VALID) { + txn->mt_dbs[i].md_flags = env->me_dbflags[i] & PERSISTENT_FLAGS; + txn->mt_dbflags[i] = DB_VALID | DB_USRVALID | DB_STALE; + mdbx_tassert(txn, txn->mt_dbxs[i].md_cmp != NULL); + } + } + txn->mt_numdbs = env->me_numdbs; + } + + for (slot = scan = txn->mt_numdbs; --scan >= CORE_DBS;) { + if (!txn->mt_dbxs[scan].md_name.iov_len) { + /* Remember this free slot */ + slot = scan; + continue; + } + if (len == txn->mt_dbxs[scan].md_name.iov_len && + !strncmp(table_name, txn->mt_dbxs[scan].md_name.iov_base, len)) { + *dbi = scan; + rc = mdbx_dbi_bind(txn, scan, user_flags, keycmp, datacmp); + goto bailout; + } + } + + if (unlikely(slot >= env->me_maxdbs)) { + rc = MDBX_DBS_FULL; + goto bailout; + } + + unsigned dbflag = DB_FRESH | DB_VALID | DB_USRVALID; + MDBX_db db_dummy; + if (unlikely(rc)) { + /* MDBX_NOTFOUND and MDBX_CREATE: Create new DB */ + mdbx_tassert(txn, rc == MDBX_NOTFOUND); + memset(&db_dummy, 0, sizeof(db_dummy)); + db_dummy.md_root = P_INVALID; + db_dummy.md_flags = user_flags & PERSISTENT_FLAGS; + data.iov_len = sizeof(db_dummy); + data.iov_base = &db_dummy; + WITH_CURSOR_TRACKING( + mc, + rc = mdbx_cursor_put(&mc, &key, &data, F_SUBDATA | MDBX_NOOVERWRITE)); + + if (unlikely(rc != MDBX_SUCCESS)) + goto bailout; + + dbflag |= DB_DIRTY | DB_CREAT; + } + + /* Got info, register DBI in this txn */ + txn->mt_dbxs[slot].md_cmp = nullptr; + txn->mt_dbxs[slot].md_dcmp = nullptr; + txn->mt_dbs[slot] = *(MDBX_db *)data.iov_base; + env->me_dbflags[slot] = 0; + rc = mdbx_dbi_bind(txn, slot, user_flags, keycmp, datacmp); + if (unlikely(rc != MDBX_SUCCESS)) { + mdbx_tassert(txn, (dbflag & DB_CREAT) == 0); + bailout: + mdbx_free(namedup); + } else { + txn->mt_dbflags[slot] = (uint8_t)dbflag; + txn->mt_dbxs[slot].md_name.iov_base = namedup; + txn->mt_dbxs[slot].md_name.iov_len = len; + txn->mt_numdbs += (slot == txn->mt_numdbs); + if ((dbflag & DB_CREAT) == 0) { + env->me_dbflags[slot] = txn->mt_dbs[slot].md_flags | MDBX_VALID; + mdbx_compiler_barrier(); + if (env->me_numdbs <= slot) + env->me_numdbs = slot + 1; + } else { + env->me_dbiseqs[slot] += 1; + } + txn->mt_dbiseqs[slot] = env->me_dbiseqs[slot]; + *dbi = slot; + } + + mdbx_ensure(env, mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); + return rc; +} + +int mdbx_dbi_open(MDBX_txn *txn, const char *table_name, unsigned table_flags, + MDBX_dbi *dbi) { + return mdbx_dbi_open_ex(txn, table_name, table_flags, dbi, nullptr, nullptr); +} + +int __cold mdbx_dbi_stat(MDBX_txn *txn, MDBX_dbi dbi, MDBX_stat *dest, + size_t bytes) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!dest)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_VALID))) + return MDBX_EINVAL; + + const size_t size_before_modtxnid = offsetof(MDBX_stat, ms_mod_txnid); + if (unlikely(bytes != sizeof(MDBX_stat)) && bytes != size_before_modtxnid) + return MDBX_EINVAL; + + if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED)) + return MDBX_BAD_TXN; + + if (unlikely(txn->mt_dbflags[dbi] & DB_STALE)) { + rc = mdbx_fetch_sdb(txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + mdbx_stat0(txn->mt_env, &txn->mt_dbs[dbi], dest, bytes); + return MDBX_SUCCESS; +} + +static int mdbx_dbi_close_locked(MDBX_env *env, MDBX_dbi dbi) { + mdbx_assert(env, dbi >= CORE_DBS); + if (unlikely(dbi >= env->me_numdbs)) + return MDBX_BAD_DBI; + + char *ptr = env->me_dbxs[dbi].md_name.iov_base; + /* If there was no name, this was already closed */ + if (unlikely(!ptr)) + return MDBX_BAD_DBI; + + env->me_dbflags[dbi] = 0; + env->me_dbxs[dbi].md_name.iov_len = 0; + mdbx_compiler_barrier(); + env->me_dbiseqs[dbi]++; + env->me_dbxs[dbi].md_name.iov_base = NULL; + mdbx_free(ptr); + return MDBX_SUCCESS; +} + +int mdbx_dbi_close(MDBX_env *env, MDBX_dbi dbi) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(dbi < CORE_DBS || dbi >= env->me_maxdbs)) + return MDBX_EINVAL; + + int rc = mdbx_fastmutex_acquire(&env->me_dbi_lock); + if (likely(rc == MDBX_SUCCESS)) { + rc = mdbx_dbi_close_locked(env, dbi); + mdbx_ensure(env, mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); + } + return rc; +} + +int mdbx_dbi_flags_ex(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags, + unsigned *state) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!flags || !state)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_VALID))) + return MDBX_EINVAL; + + *flags = txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS; + *state = txn->mt_dbflags[dbi] & (DB_FRESH | DB_CREAT | DB_DIRTY | DB_STALE); + + return MDBX_SUCCESS; +} + +int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags) { + unsigned state; + return mdbx_dbi_flags_ex(txn, dbi, flags, &state); +} + +/* Add all the DB's pages to the free list. + * [in] mc Cursor on the DB to free. + * [in] subs non-Zero to check for sub-DBs in this DB. + * Returns 0 on success, non-zero on failure. */ +static int mdbx_drop0(MDBX_cursor *mc, int subs) { + int rc = mdbx_page_search(mc, NULL, MDBX_PS_FIRST); + if (likely(rc == MDBX_SUCCESS)) { + MDBX_txn *txn = mc->mc_txn; + MDBX_cursor mx; + unsigned i; + + /* DUPSORT sub-DBs have no ovpages/DBs. Omit scanning leaves. + * This also avoids any P_LEAF2 pages, which have no nodes. + * Also if the DB doesn't have sub-DBs and has no overflow + * pages, omit scanning leaves. */ + if ((mc->mc_flags & C_SUB) || (subs | mc->mc_db->md_overflow_pages) == 0) + mdbx_cursor_pop(mc); + + rc = mdbx_pnl_need(&txn->tw.retired_pages, + mc->mc_db->md_branch_pages + mc->mc_db->md_leaf_pages + + mc->mc_db->md_overflow_pages); + if (unlikely(rc)) + goto done; + + mdbx_cursor_copy(mc, &mx); + while (mc->mc_snum > 0) { + MDBX_page *mp = mc->mc_pg[mc->mc_top]; + unsigned n = page_numkeys(mp); + if (IS_LEAF(mp)) { + for (i = 0; i < n; i++) { + MDBX_node *node = page_node(mp, i); + if (node_flags(node) & F_BIGDATA) { + MDBX_page *omp; + rc = mdbx_page_get(mc, node_largedata_pgno(node), &omp, NULL); + if (unlikely(rc)) + goto done; + mdbx_cassert(mc, IS_OVERFLOW(omp)); + rc = mdbx_page_retire(mc, omp); + if (unlikely(rc)) + goto done; + if (!mc->mc_db->md_overflow_pages && !subs) + break; + } else if (subs && (node_flags(node) & F_SUBDATA)) { + rc = mdbx_xcursor_init1(mc, node); + if (unlikely(rc != MDBX_SUCCESS)) + goto done; + rc = mdbx_drop0(&mc->mc_xcursor->mx_cursor, 0); + if (unlikely(rc)) + goto done; + } + } + if (!subs && !mc->mc_db->md_overflow_pages) + goto pop; + } else { + for (i = 0; i < n; i++) { + /* free it */ + rc = mdbx_retire_pgno(mc, node_pgno(page_node(mp, i))); + if (unlikely(rc)) + goto done; + } + } + if (!mc->mc_top) + break; + mdbx_cassert(mc, i <= UINT16_MAX); + mc->mc_ki[mc->mc_top] = (indx_t)i; + rc = mdbx_cursor_sibling(mc, 1); + if (rc) { + if (unlikely(rc != MDBX_NOTFOUND)) + goto done; + /* no more siblings, go back to beginning + * of previous level. */ + pop: + mdbx_cursor_pop(mc); + mc->mc_ki[0] = 0; + for (i = 1; i < mc->mc_snum; i++) { + mc->mc_ki[i] = 0; + mc->mc_pg[i] = mx.mc_pg[i]; + } + } + } + /* free it */ + rc = mdbx_retire_pgno(mc, mc->mc_db->md_root); + done: + if (unlikely(rc)) + txn->mt_flags |= MDBX_TXN_ERROR; + } else if (rc == MDBX_NOTFOUND) { + rc = MDBX_SUCCESS; + } + mc->mc_flags &= ~C_INITIALIZED; + return rc; +} + +int mdbx_drop(MDBX_txn *txn, MDBX_dbi dbi, int del) { + int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(1 < (unsigned)del)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(TXN_DBI_CHANGED(txn, dbi))) + return MDBX_BAD_DBI; + + MDBX_cursor *mc; + rc = mdbx_cursor_open(txn, dbi, &mc); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) { + rc = MDBX_EINVAL; + goto bailout; + } + + if (unlikely(TXN_DBI_CHANGED(txn, dbi))) { + rc = MDBX_BAD_DBI; + goto bailout; + } + + rc = mdbx_drop0(mc, mc->mc_db->md_flags & MDBX_DUPSORT); + /* Invalidate the dropped DB's cursors */ + for (MDBX_cursor *m2 = txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) + m2->mc_flags &= ~(C_INITIALIZED | C_EOF); + if (unlikely(rc)) + goto bailout; + + /* Can't delete the main DB */ + if (del && dbi >= CORE_DBS) { + rc = mdbx_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, F_SUBDATA); + if (likely(rc == MDBX_SUCCESS)) { + txn->mt_dbflags[dbi] = DB_STALE; + MDBX_env *env = txn->mt_env; + rc = mdbx_fastmutex_acquire(&env->me_dbi_lock); + if (unlikely(rc != MDBX_SUCCESS)) { + txn->mt_flags |= MDBX_TXN_ERROR; + goto bailout; + } + mdbx_dbi_close_locked(env, dbi); + mdbx_ensure(env, + mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); + } else { + txn->mt_flags |= MDBX_TXN_ERROR; + } + } else { + /* reset the DB record, mark it dirty */ + txn->mt_dbflags[dbi] |= DB_DIRTY; + txn->mt_dbs[dbi].md_depth = 0; + txn->mt_dbs[dbi].md_branch_pages = 0; + txn->mt_dbs[dbi].md_leaf_pages = 0; + txn->mt_dbs[dbi].md_overflow_pages = 0; + txn->mt_dbs[dbi].md_entries = 0; + txn->mt_dbs[dbi].md_root = P_INVALID; + txn->mt_dbs[dbi].md_seq = 0; + txn->mt_flags |= MDBX_TXN_DIRTY; + } + +bailout: + mdbx_cursor_close(mc); + return rc; +} + +int mdbx_set_compare(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cmp_func *cmp) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + txn->mt_dbxs[dbi].md_cmp = cmp; + return MDBX_SUCCESS; +} + +int mdbx_set_dupsort(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cmp_func *cmp) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + txn->mt_dbxs[dbi].md_dcmp = cmp; + return MDBX_SUCCESS; +} + +int __cold mdbx_reader_list(const MDBX_env *env, MDBX_reader_list_func *func, + void *ctx) { + if (unlikely(!env || !func)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = MDBX_RESULT_TRUE; + int serial = 0; + if (likely(env->me_lck)) { + const unsigned snap_nreaders = env->me_lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; i++) { + const MDBX_reader *r = env->me_lck->mti_readers + i; + retry_reader:; + const uint32_t pid = r->mr_pid; + if (!pid) + continue; + txnid_t txnid = safe64_read(&r->mr_txnid); + const size_t tid = r->mr_tid; + const pgno_t pages_used = r->mr_snapshot_pages_used; + const uint64_t reader_pages_retired = r->mr_snapshot_pages_retired; + mdbx_compiler_barrier(); + if (unlikely(tid != r->mr_tid || + pages_used != r->mr_snapshot_pages_used || + reader_pages_retired != r->mr_snapshot_pages_retired || + txnid != safe64_read(&r->mr_txnid) || pid != r->mr_pid)) + goto retry_reader; + + mdbx_assert(env, txnid > 0); + if (txnid >= SAFE64_INVALID_THRESHOLD) + txnid = 0; + + size_t bytes_used = 0; + size_t bytes_retained = 0; + uint64_t lag = 0; + if (txnid) { + retry_header:; + const MDBX_meta *const recent_meta = mdbx_meta_head(env); + const uint64_t head_pages_retired = recent_meta->mm_pages_retired; + const txnid_t head_txnid = mdbx_meta_txnid_fluid(env, recent_meta); + mdbx_compiler_barrier(); + if (unlikely(recent_meta != mdbx_meta_head(env) || + head_pages_retired != recent_meta->mm_pages_retired) || + head_txnid != mdbx_meta_txnid_fluid(env, recent_meta)) + goto retry_header; + + lag = (head_txnid - txnid) / MDBX_TXNID_STEP; + bytes_used = pgno2bytes(env, pages_used); + bytes_retained = (head_pages_retired > reader_pages_retired) + ? pgno2bytes(env, (pgno_t)(head_pages_retired - + reader_pages_retired)) + : 0; + } + rc = func(ctx, ++serial, i, pid, (mdbx_tid_t)tid, txnid, lag, bytes_used, + bytes_retained); + if (unlikely(rc != MDBX_SUCCESS)) + break; + } + } + + return rc; +} + +/* Insert pid into list if not already present. + * return -1 if already present. */ +static int __cold mdbx_pid_insert(uint32_t *ids, uint32_t pid) { + /* binary search of pid in list */ + unsigned base = 0; + unsigned cursor = 1; + int val = 0; + unsigned n = ids[0]; + + while (n > 0) { + unsigned pivot = n >> 1; + cursor = base + pivot + 1; + val = pid - ids[cursor]; + + if (val < 0) { + n = pivot; + } else if (val > 0) { + base = cursor; + n -= pivot + 1; + } else { + /* found, so it's a duplicate */ + return -1; + } + } + + if (val > 0) + ++cursor; + + ids[0]++; + for (n = ids[0]; n > cursor; n--) + ids[n] = ids[n - 1]; + ids[n] = pid; + return 0; +} + +int __cold mdbx_reader_check(MDBX_env *env, int *dead) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (dead) + *dead = 0; + return mdbx_reader_check0(env, false, dead); +} + +/* Return: + * MDBX_RESULT_TRUE - done and mutex recovered + * MDBX_SUCCESS - done + * Otherwise errcode. */ +int __cold mdbx_reader_check0(MDBX_env *env, int rdt_locked, int *dead) { + mdbx_assert(env, rdt_locked >= 0); + +#if MDBX_TXN_CHECKPID + if (unlikely(env->me_pid != mdbx_getpid())) { + env->me_flags |= MDBX_FATAL_ERROR; + return MDBX_PANIC; + } +#endif /* MDBX_TXN_CHECKPID */ + + MDBX_lockinfo *const lck = env->me_lck; + if (unlikely(lck == NULL)) { + /* exclusive mode */ + if (dead) + *dead = 0; + return MDBX_SUCCESS; + } + + lck->mti_reader_check_timestamp = mdbx_osal_monotime(); + const unsigned snap_nreaders = lck->mti_numreaders; + uint32_t pidsbuf_onstask[142]; + uint32_t *const pids = + (snap_nreaders < ARRAY_LENGTH(pidsbuf_onstask)) + ? pidsbuf_onstask + : mdbx_malloc((snap_nreaders + 1) * sizeof(uint32_t)); + if (unlikely(!pids)) + return MDBX_ENOMEM; + + pids[0] = 0; + + int rc = MDBX_SUCCESS, count = 0; + for (unsigned i = 0; i < snap_nreaders; i++) { + const uint32_t pid = lck->mti_readers[i].mr_pid; + if (pid == 0) + continue /* skip empty */; + if (pid == env->me_pid) + continue /* skip self */; + if (mdbx_pid_insert(pids, pid) != 0) + continue /* such pid already processed */; + + int err = mdbx_rpid_check(env, pid); + if (err == MDBX_RESULT_TRUE) + continue /* reader is live */; + + if (err != MDBX_SUCCESS) { + rc = err; + break /* mdbx_rpid_check() failed */; + } + + /* stale reader found */ + if (!rdt_locked) { + err = mdbx_rdt_lock(env); + if (MDBX_IS_ERROR(err)) { + rc = err; + break; + } + + rdt_locked = -1; + if (err == MDBX_RESULT_TRUE) { + /* mutex recovered, the mdbx_ipclock_failed() checked all readers */ + rc = MDBX_RESULT_TRUE; + break; + } + + /* a other process may have clean and reused slot, recheck */ + if (lck->mti_readers[i].mr_pid != pid) + continue; + + err = mdbx_rpid_check(env, pid); + if (MDBX_IS_ERROR(err)) { + rc = err; + break; + } + + if (err != MDBX_SUCCESS) + continue /* the race with other process, slot reused */; + } + + /* clean it */ + for (unsigned j = i; j < snap_nreaders; j++) { + if (lck->mti_readers[j].mr_pid == pid) { + mdbx_debug("clear stale reader pid %" PRIuPTR " txn %" PRIaTXN, + (size_t)pid, lck->mti_readers[j].mr_txnid.inconsistent); + lck->mti_readers[j].mr_pid = 0; + lck->mti_readers_refresh_flag = true; + count++; + } + } + } + + if (rdt_locked < 0) + mdbx_rdt_unlock(env); + + if (pids != pidsbuf_onstask) + mdbx_free(pids); + + if (dead) + *dead = count; + return rc; +} + +int __cold mdbx_setup_debug(int loglevel, int flags, MDBX_debug_func *logger) { + const int rc = mdbx_runtime_flags | (mdbx_loglevel << 16); + +#if !MDBX_DEBUG + (void)loglevel; +#else + if (loglevel != MDBX_LOG_DONTCHANGE) + mdbx_loglevel = (uint8_t)loglevel; +#endif + + if (flags != MDBX_DBG_DONTCHANGE) { + flags &= +#if MDBX_DEBUG + MDBX_DBG_ASSERT | MDBX_DBG_AUDIT | MDBX_DBG_JITTER | +#endif + MDBX_DBG_DUMP | MDBX_DBG_LEGACY_MULTIOPEN | MDBX_DBG_LEGACY_OVERLAP; + mdbx_runtime_flags = (uint8_t)flags; + } + + if (logger != MDBX_LOGGER_DONTCHANGE) + mdbx_debug_logger = logger; + return rc; +} + +static txnid_t __cold mdbx_oomkick(MDBX_env *env, const txnid_t laggard) { + mdbx_debug("%s", "DB size maxed out"); + + int retry; + for (retry = 0; retry < INT_MAX; ++retry) { + txnid_t oldest = mdbx_recent_steady_txnid(env); + mdbx_assert(env, oldest < env->me_txn0->mt_txnid); + mdbx_assert(env, oldest >= laggard); + mdbx_assert(env, oldest >= *env->me_oldest); + if (oldest == laggard || unlikely(env->me_lck == NULL /* exclusive mode */)) + return oldest; + + if (MDBX_IS_ERROR(mdbx_reader_check0(env, false, NULL))) + break; + + MDBX_reader *asleep = nullptr; + MDBX_lockinfo *const lck = env->me_lck; + uint64_t oldest_retired = UINT64_MAX; + const unsigned snap_nreaders = lck->mti_numreaders; + for (unsigned i = 0; i < snap_nreaders; ++i) { + retry: + if (lck->mti_readers[i].mr_pid) { + /* mdbx_jitter4testing(true); */ + const uint64_t snap_retired = + lck->mti_readers[i].mr_snapshot_pages_retired; + const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); + mdbx_memory_barrier(); + if (unlikely(snap_retired != + lck->mti_readers[i].mr_snapshot_pages_retired || + snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) + goto retry; + if (oldest > snap_txnid && + laggard <= /* ignore pending updates */ snap_txnid) { + oldest = snap_txnid; + oldest_retired = snap_retired; + asleep = &lck->mti_readers[i]; + } + } + } + + if (laggard < oldest || !asleep) { + if (retry && env->me_oom_func) { + /* LY: notify end of oom-loop */ + const txnid_t gap = oldest - laggard; + env->me_oom_func(env, 0, 0, laggard, + (gap < UINT_MAX) ? (unsigned)gap : UINT_MAX, 0, + -retry); + } + mdbx_notice("oom-kick: update oldest %" PRIaTXN " -> %" PRIaTXN, + *env->me_oldest, oldest); + mdbx_assert(env, *env->me_oldest <= oldest); + return *env->me_oldest = oldest; + } + + if (!env->me_oom_func) + break; + + uint32_t pid = asleep->mr_pid; + size_t tid = asleep->mr_tid; + if (safe64_read(&asleep->mr_txnid) != laggard || pid <= 0) + continue; + + const MDBX_meta *head_meta = mdbx_meta_head(env); + const txnid_t gap = + (mdbx_meta_txnid_stable(env, head_meta) - laggard) / MDBX_TXNID_STEP; + const uint64_t head_retired = head_meta->mm_pages_retired; + const size_t space = + (oldest_retired > head_retired) + ? pgno2bytes(env, (pgno_t)(oldest_retired - head_retired)) + : 0; + int rc = env->me_oom_func(env, pid, (mdbx_tid_t)tid, laggard, + (gap < UINT_MAX) ? (unsigned)gap : UINT_MAX, + space, retry); + if (rc < 0) + break; + + if (rc > 0) { + if (rc == 1) { + safe64_reset_compare(&asleep->mr_txnid, laggard); + } else { + safe64_reset(&asleep->mr_txnid, true); + asleep->mr_tid = 0; + asleep->mr_pid = 0; + } + lck->mti_readers_refresh_flag = true; + mdbx_flush_incoherent_cpu_writeback(); + } + } + + if (retry && env->me_oom_func) { + /* LY: notify end of oom-loop */ + env->me_oom_func(env, 0, 0, laggard, 0, 0, -retry); + } + return mdbx_find_oldest(env->me_txn); +} + +int __cold mdbx_env_set_syncbytes(MDBX_env *env, size_t threshold) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR))) + return MDBX_EACCESS; + + if (unlikely(!env->me_map)) + return MDBX_EPERM; + + *env->me_autosync_threshold = bytes2pgno(env, threshold + env->me_psize - 1); + if (threshold) { + int err = mdbx_env_sync_poll(env); + if (unlikely(MDBX_IS_ERROR(err))) + return err; + } + return MDBX_SUCCESS; +} + +int __cold mdbx_env_set_syncperiod(MDBX_env *env, unsigned seconds_16dot16) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + if (unlikely(env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR))) + return MDBX_EACCESS; + + if (unlikely(!env->me_map)) + return MDBX_EPERM; + + *env->me_autosync_period = mdbx_osal_16dot16_to_monotime(seconds_16dot16); + if (seconds_16dot16) { + int err = mdbx_env_sync_poll(env); + if (unlikely(MDBX_IS_ERROR(err))) + return err; + } + return MDBX_SUCCESS; +} + +int __cold mdbx_env_set_oomfunc(MDBX_env *env, MDBX_oom_func *oomfunc) { + if (unlikely(!env)) + return MDBX_EINVAL; + + if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) + return MDBX_EBADSIGN; + + env->me_oom_func = oomfunc; + return MDBX_SUCCESS; +} + +MDBX_oom_func *__cold mdbx_env_get_oomfunc(const MDBX_env *env) { + return likely(env && env->me_signature == MDBX_ME_SIGNATURE) + ? env->me_oom_func + : NULL; +} + +#ifdef __SANITIZE_THREAD__ +/* LY: avoid tsan-trap by me_txn, mm_last_pg and mt_next_pgno */ +__attribute__((__no_sanitize_thread__, __noinline__)) +#endif +int mdbx_txn_straggler(const MDBX_txn *txn, int *percent) +{ + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return (rc > 0) ? -rc : rc; + + MDBX_env *env = txn->mt_env; + if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0)) { + if (percent) + *percent = + (int)((txn->mt_next_pgno * UINT64_C(100) + txn->mt_end_pgno / 2) / + txn->mt_end_pgno); + return 0; + } + + txnid_t recent; + MDBX_meta *meta; + do { + meta = mdbx_meta_head(env); + recent = mdbx_meta_txnid_fluid(env, meta); + if (percent) { + const pgno_t maxpg = meta->mm_geo.now; + *percent = (int)((meta->mm_geo.next * UINT64_C(100) + maxpg / 2) / maxpg); + } + } while (unlikely(recent != mdbx_meta_txnid_fluid(env, meta))); + + txnid_t lag = (recent - txn->mt_txnid) / MDBX_TXNID_STEP; + return (lag > INT_MAX) ? INT_MAX : (int)lag; +} + +typedef struct mdbx_walk_ctx { + void *mw_user; + MDBX_pgvisitor_func *mw_visitor; + MDBX_cursor mw_cursor; +} mdbx_walk_ctx_t; + +/* Depth-first tree traversal. */ +static int __cold mdbx_env_walk(mdbx_walk_ctx_t *ctx, const char *dbi, + pgno_t pgno, int deep) { + if (unlikely(pgno == P_INVALID)) + return MDBX_SUCCESS; /* empty db */ + + MDBX_page *mp; + int rc = mdbx_page_get(&ctx->mw_cursor, pgno, &mp, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + rc = mdbx_page_check(ctx->mw_cursor.mc_txn->mt_env, mp, false); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + const int nkeys = page_numkeys(mp); + size_t header_size = IS_LEAF2(mp) ? PAGEHDRSZ : PAGEHDRSZ + mp->mp_lower; + size_t unused_size = page_room(mp); + size_t payload_size = 0; + size_t align_bytes = 0; + MDBX_page_type_t type; + + /* LY: Don't use mask here, e.g bitwise + * (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP). + * Pages should not me marked dirty/loose or otherwise. */ + switch (mp->mp_flags) { + case P_BRANCH: + type = MDBX_page_branch; + if (unlikely(nkeys < 2)) + return MDBX_CORRUPTED; + break; + case P_LEAF: + type = MDBX_page_leaf; + break; + case P_LEAF | P_LEAF2: + type = MDBX_page_dupfixed_leaf; + break; + default: + return MDBX_CORRUPTED; + } + + for (int i = 0; i < nkeys; + align_bytes += ((payload_size + align_bytes) & 1), i++) { + if (type == MDBX_page_dupfixed_leaf) { + /* LEAF2 pages have no mp_ptrs[] or node headers */ + payload_size += mp->mp_leaf2_ksize; + continue; + } + + MDBX_node *node = page_node(mp, i); + payload_size += NODESIZE + node_ks(node); + + if (type == MDBX_page_branch) { + assert(i > 0 || node_ks(node) == 0); + continue; + } + + assert(type == MDBX_page_leaf); + switch (node_flags(node)) { + case 0 /* usual node */: { + payload_size += node_ds(node); + } break; + + case F_BIGDATA /* long data on the large/overflow page */: { + payload_size += sizeof(pgno_t); + + const pgno_t large_pgno = node_largedata_pgno(node); + MDBX_page *op; + rc = mdbx_page_get(&ctx->mw_cursor, large_pgno, &op, NULL); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_page_check(ctx->mw_cursor.mc_txn->mt_env, op, false); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + /* LY: Don't use mask here, e.g bitwise + * (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP). + * Pages should not me marked dirty/loose or otherwise. */ + if (unlikely(P_OVERFLOW != op->mp_flags)) + return MDBX_CORRUPTED; + + const size_t over_header = PAGEHDRSZ; + const size_t over_payload = node_ds(node); + const size_t over_unused = + pgno2bytes(ctx->mw_cursor.mc_txn->mt_env, op->mp_pages) - + over_payload - over_header; + + rc = ctx->mw_visitor( + large_pgno, op->mp_pages, ctx->mw_user, deep, dbi, + pgno2bytes(ctx->mw_cursor.mc_txn->mt_env, op->mp_pages), + MDBX_page_large, 1, over_payload, over_header, over_unused); + } break; + + case F_SUBDATA /* sub-db */: { + const size_t namelen = node_ks(node); + if (unlikely(namelen == 0 || node_ds(node) < sizeof(MDBX_db))) + return MDBX_CORRUPTED; + payload_size += node_ds(node); + } break; + + case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: { + if (unlikely(node_ds(node) != sizeof(MDBX_db))) + return MDBX_CORRUPTED; + payload_size += sizeof(MDBX_db); + } break; + + case F_DUPDATA /* short sub-page */: { + if (unlikely(node_ds(node) <= PAGEHDRSZ)) + return MDBX_CORRUPTED; + + MDBX_page *sp = node_data(node); + const int nsubkeys = page_numkeys(sp); + size_t subheader_size = + IS_LEAF2(sp) ? PAGEHDRSZ : PAGEHDRSZ + sp->mp_lower; + size_t subunused_size = page_room(sp); + size_t subpayload_size = 0; + size_t subalign_bytes = 0; + MDBX_page_type_t subtype; + + switch (sp->mp_flags & ~P_DIRTY /* ignore for sub-pages */) { + case P_LEAF | P_SUBP: + subtype = MDBX_subpage_leaf; + break; + case P_LEAF | P_LEAF2 | P_SUBP: + subtype = MDBX_subpage_dupfixed_leaf; + break; + default: + return MDBX_CORRUPTED; + } + + for (int j = 0; j < nsubkeys; + subalign_bytes += ((subpayload_size + subalign_bytes) & 1), j++) { + + if (subtype == MDBX_subpage_dupfixed_leaf) { + /* LEAF2 pages have no mp_ptrs[] or node headers */ + subpayload_size += sp->mp_leaf2_ksize; + } else { + assert(subtype == MDBX_subpage_leaf); + MDBX_node *subnode = page_node(sp, j); + subpayload_size += NODESIZE + node_ks(subnode) + node_ds(subnode); + if (unlikely(node_flags(subnode) != 0)) + return MDBX_CORRUPTED; + } + } + + rc = ctx->mw_visitor(pgno, 0, ctx->mw_user, deep + 1, dbi, node_ds(node), + subtype, nsubkeys, subpayload_size, subheader_size, + subunused_size + subalign_bytes); + header_size += subheader_size; + unused_size += subunused_size; + payload_size += subpayload_size; + align_bytes += subalign_bytes; + } break; + + default: + return MDBX_CORRUPTED; + } + + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + rc = ctx->mw_visitor(mp->mp_pgno, 1, ctx->mw_user, deep, dbi, + ctx->mw_cursor.mc_txn->mt_env->me_psize, type, nkeys, + payload_size, header_size, unused_size + align_bytes); + + if (unlikely(rc != MDBX_SUCCESS)) + return (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc; + + for (int i = 0; i < nkeys; i++) { + if (type == MDBX_page_dupfixed_leaf) + continue; + + MDBX_node *node = page_node(mp, i); + if (type == MDBX_page_branch) { + rc = mdbx_env_walk(ctx, dbi, node_pgno(node), deep + 1); + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc != MDBX_RESULT_TRUE) + return rc; + break; + } + continue; + } + + assert(type == MDBX_page_leaf); + MDBX_db db; + switch (node_flags(node)) { + default: + continue; + + case F_SUBDATA /* sub-db */: { + const size_t namelen = node_ks(node); + if (unlikely(namelen == 0 || node_ds(node) != sizeof(MDBX_db))) + return MDBX_CORRUPTED; + + char namebuf_onstask[142]; + char *const name = (namelen < sizeof(namebuf_onstask)) + ? namebuf_onstask + : mdbx_malloc(namelen + 1); + if (name) { + memcpy(name, node_key(node), namelen); + name[namelen] = 0; + memcpy(&db, node_data(node), sizeof(db)); + rc = mdbx_env_walk(ctx, name, db.md_root, deep + 1); + if (name != namebuf_onstask) + mdbx_free(name); + } else { + rc = MDBX_ENOMEM; + } + } break; + + case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: + if (unlikely(node_ds(node) != sizeof(MDBX_db))) + return MDBX_CORRUPTED; + + memcpy(&db, node_data(node), sizeof(db)); + rc = mdbx_env_walk(ctx, dbi, db.md_root, deep + 1); + break; + } + + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + return MDBX_SUCCESS; +} + +int __cold mdbx_env_pgwalk(MDBX_txn *txn, MDBX_pgvisitor_func *visitor, + void *user) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + mdbx_walk_ctx_t ctx; + memset(&ctx, 0, sizeof(ctx)); + ctx.mw_cursor.mc_snum = 1; + ctx.mw_cursor.mc_txn = txn; + ctx.mw_user = user; + ctx.mw_visitor = visitor; + + rc = visitor(0, NUM_METAS, user, 0, MDBX_PGWALK_META, + pgno2bytes(txn->mt_env, NUM_METAS), MDBX_page_meta, NUM_METAS, + sizeof(MDBX_meta) * NUM_METAS, PAGEHDRSZ * NUM_METAS, + (txn->mt_env->me_psize - sizeof(MDBX_meta) - PAGEHDRSZ) * + NUM_METAS); + if (!MDBX_IS_ERROR(rc)) + rc = mdbx_env_walk(&ctx, MDBX_PGWALK_GC, txn->mt_dbs[FREE_DBI].md_root, 0); + if (!MDBX_IS_ERROR(rc)) + rc = + mdbx_env_walk(&ctx, MDBX_PGWALK_MAIN, txn->mt_dbs[MAIN_DBI].md_root, 0); + if (!MDBX_IS_ERROR(rc)) + rc = visitor(P_INVALID, 0, user, INT_MIN, NULL, 0, MDBX_page_void, 0, 0, 0, + 0); + return rc; +} + +int mdbx_canary_put(MDBX_txn *txn, const mdbx_canary *canary) { + int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (likely(canary)) { + if (txn->mt_canary.x == canary->x && txn->mt_canary.y == canary->y && + txn->mt_canary.z == canary->z) + return MDBX_SUCCESS; + txn->mt_canary.x = canary->x; + txn->mt_canary.y = canary->y; + txn->mt_canary.z = canary->z; + } + txn->mt_canary.v = txn->mt_txnid; + txn->mt_flags |= MDBX_TXN_DIRTY; + + return MDBX_SUCCESS; +} + +int mdbx_canary_get(const MDBX_txn *txn, mdbx_canary *canary) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(canary == NULL)) + return MDBX_EINVAL; + + *canary = txn->mt_canary; + return MDBX_SUCCESS; +} + +int mdbx_cursor_on_first(const MDBX_cursor *mc) { + if (unlikely(mc == NULL)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + if (!(mc->mc_flags & C_INITIALIZED)) + return MDBX_RESULT_FALSE; + + for (unsigned i = 0; i < mc->mc_snum; ++i) { + if (mc->mc_ki[i]) + return MDBX_RESULT_FALSE; + } + + return MDBX_RESULT_TRUE; +} + +int mdbx_cursor_on_last(const MDBX_cursor *mc) { + if (unlikely(mc == NULL)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + if (!(mc->mc_flags & C_INITIALIZED)) + return MDBX_RESULT_FALSE; + + for (unsigned i = 0; i < mc->mc_snum; ++i) { + unsigned nkeys = page_numkeys(mc->mc_pg[i]); + if (mc->mc_ki[i] < nkeys - 1) + return MDBX_RESULT_FALSE; + } + + return MDBX_RESULT_TRUE; +} + +int mdbx_cursor_eof(const MDBX_cursor *mc) { + if (unlikely(mc == NULL)) + return MDBX_EINVAL; + + if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + if ((mc->mc_flags & C_INITIALIZED) == 0) + return MDBX_RESULT_TRUE; + + if (mc->mc_snum == 0) + return MDBX_RESULT_TRUE; + + if ((mc->mc_flags & C_EOF) && + mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top])) + return MDBX_RESULT_TRUE; + + return MDBX_RESULT_FALSE; +} + +//------------------------------------------------------------------------------ + +struct diff_result { + ptrdiff_t diff; + int level; + int root_nkeys; +}; + +/* calculates: r = x - y */ +__hot static int cursor_diff(const MDBX_cursor *const __restrict x, + const MDBX_cursor *const __restrict y, + struct diff_result *const __restrict r) { + r->diff = 0; + r->level = 0; + r->root_nkeys = 0; + + if (unlikely(y->mc_signature != MDBX_MC_SIGNATURE || + x->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = check_txn(x->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(x->mc_txn != y->mc_txn)) + return MDBX_BAD_TXN; + + if (unlikely(y->mc_dbi != x->mc_dbi)) + return MDBX_EINVAL; + + if (unlikely(!(y->mc_flags & x->mc_flags & C_INITIALIZED))) + return MDBX_ENODATA; + + while (likely(r->level < y->mc_snum && r->level < x->mc_snum)) { + if (unlikely(y->mc_pg[r->level] != x->mc_pg[r->level])) + return MDBX_PROBLEM; + + int nkeys = page_numkeys(y->mc_pg[r->level]); + assert(nkeys > 0); + if (r->level == 0) + r->root_nkeys = nkeys; + + const int limit_ki = nkeys - 1; + const int x_ki = x->mc_ki[r->level]; + const int y_ki = y->mc_ki[r->level]; + r->diff = ((x_ki < limit_ki) ? x_ki : limit_ki) - + ((y_ki < limit_ki) ? y_ki : limit_ki); + if (r->diff == 0) { + r->level += 1; + continue; + } + + while (unlikely(r->diff == 1) && + likely(r->level + 1 < y->mc_snum && r->level + 1 < x->mc_snum)) { + r->level += 1; + /* DB'PAGEs: 0------------------>MAX + * + * CURSORs: y < x + * STACK[i ]: | + * STACK[+1]: ...y++N|0++x... + */ + nkeys = page_numkeys(y->mc_pg[r->level]); + r->diff = (nkeys - y->mc_ki[r->level]) + x->mc_ki[r->level]; + assert(r->diff > 0); + } + + while (unlikely(r->diff == -1) && + likely(r->level + 1 < y->mc_snum && r->level + 1 < x->mc_snum)) { + r->level += 1; + /* DB'PAGEs: 0------------------>MAX + * + * CURSORs: x < y + * STACK[i ]: | + * STACK[+1]: ...x--N|0--y... + */ + nkeys = page_numkeys(x->mc_pg[r->level]); + r->diff = -(nkeys - x->mc_ki[r->level]) - y->mc_ki[r->level]; + assert(r->diff < 0); + } + + return MDBX_SUCCESS; + } + + r->diff = CMP2INT(x->mc_flags & C_EOF, y->mc_flags & C_EOF); + return MDBX_SUCCESS; +} + +__hot static ptrdiff_t estimate(const MDBX_db *db, + struct diff_result *const __restrict dr) { + /* root: branch-page => scale = leaf-factor * branch-factor^(N-1) + * level-1: branch-page(s) => scale = leaf-factor * branch-factor^2 + * level-2: branch-page(s) => scale = leaf-factor * branch-factor + * level-N: branch-page(s) => scale = leaf-factor + * leaf-level: leaf-page(s) => scale = 1 + */ + ptrdiff_t btree_power = db->md_depth - 2 - dr->level; + if (btree_power < 0) + return dr->diff; + + ptrdiff_t estimated = + (ptrdiff_t)db->md_entries * dr->diff / (ptrdiff_t)db->md_leaf_pages; + if (btree_power == 0) + return estimated; + + if (db->md_depth < 4) { + assert(dr->level == 0 && btree_power == 1); + return (ptrdiff_t)db->md_entries * dr->diff / (ptrdiff_t)dr->root_nkeys; + } + + /* average_branchpage_fillfactor = total(branch_entries) / branch_pages + total(branch_entries) = leaf_pages + branch_pages - 1 (root page) */ + const size_t log2_fixedpoint = sizeof(size_t) - 1; + const size_t half = UINT64_C(1) << (log2_fixedpoint - 1); + const size_t factor = + ((db->md_leaf_pages + db->md_branch_pages - 1) << log2_fixedpoint) / + db->md_branch_pages; + while (1) { + switch ((size_t)btree_power) { + default: { + const size_t square = (factor * factor + half) >> log2_fixedpoint; + const size_t quad = (square * square + half) >> log2_fixedpoint; + do { + estimated = estimated * quad + half; + estimated >>= log2_fixedpoint; + btree_power -= 4; + } while (btree_power >= 4); + continue; + } + case 3: + estimated = estimated * factor + half; + estimated >>= log2_fixedpoint; + __fallthrough /* fall through */; + case 2: + estimated = estimated * factor + half; + estimated >>= log2_fixedpoint; + __fallthrough /* fall through */; + case 1: + estimated = estimated * factor + half; + estimated >>= log2_fixedpoint; + __fallthrough /* fall through */; + case 0: + if (unlikely(estimated > (ptrdiff_t)db->md_entries)) + return (ptrdiff_t)db->md_entries; + if (unlikely(estimated < -(ptrdiff_t)db->md_entries)) + return -(ptrdiff_t)db->md_entries; + return estimated; + } + } +} + +int mdbx_estimate_distance(const MDBX_cursor *first, const MDBX_cursor *last, + ptrdiff_t *distance_items) { + if (unlikely(first == NULL || last == NULL || distance_items == NULL)) + return MDBX_EINVAL; + + *distance_items = 0; + struct diff_result dr; + int rc = cursor_diff(last, first, &dr); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(dr.diff == 0) && + F_ISSET(first->mc_db->md_flags & first->mc_db->md_flags, + MDBX_DUPSORT | C_INITIALIZED)) { + first = &first->mc_xcursor->mx_cursor; + last = &last->mc_xcursor->mx_cursor; + rc = cursor_diff(first, last, &dr); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + if (likely(dr.diff != 0)) + *distance_items = estimate(first->mc_db, &dr); + + return MDBX_SUCCESS; +} + +int mdbx_estimate_move(const MDBX_cursor *cursor, MDBX_val *key, MDBX_val *data, + MDBX_cursor_op move_op, ptrdiff_t *distance_items) { + if (unlikely(cursor == NULL || distance_items == NULL || + move_op == MDBX_GET_CURRENT || move_op == MDBX_GET_MULTIPLE)) + return MDBX_EINVAL; + + if (unlikely(cursor->mc_signature != MDBX_MC_SIGNATURE)) + return MDBX_EBADSIGN; + + int rc = check_txn(cursor->mc_txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (!(cursor->mc_flags & C_INITIALIZED)) + return MDBX_ENODATA; + + MDBX_cursor_couple next; + mdbx_cursor_copy(cursor, &next.outer); + next.outer.mc_xcursor = NULL; + if (cursor->mc_db->md_flags & MDBX_DUPSORT) { + next.outer.mc_xcursor = &next.inner; + rc = mdbx_xcursor_init0(&next.outer); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + MDBX_xcursor *mx = &container_of(cursor, MDBX_cursor_couple, outer)->inner; + mdbx_cursor_copy(&mx->mx_cursor, &next.inner.mx_cursor); + } + + MDBX_val stub = {0, 0}; + if (data == NULL) { + const unsigned mask = + 1 << MDBX_GET_BOTH | 1 << MDBX_GET_BOTH_RANGE | 1 << MDBX_SET_KEY; + if (unlikely(mask & (1 << move_op))) + return MDBX_EINVAL; + data = &stub; + } + + if (key == NULL) { + const unsigned mask = 1 << MDBX_GET_BOTH | 1 << MDBX_GET_BOTH_RANGE | + 1 << MDBX_SET_KEY | 1 << MDBX_SET | + 1 << MDBX_SET_RANGE; + if (unlikely(mask & (1 << move_op))) + return MDBX_EINVAL; + key = &stub; + } + + rc = mdbx_cursor_get(&next.outer, key, data, move_op); + if (unlikely(rc != MDBX_SUCCESS && + (rc != MDBX_NOTFOUND || !(next.outer.mc_flags & C_INITIALIZED)))) + return rc; + + return mdbx_estimate_distance(cursor, &next.outer, distance_items); +} + +static int mdbx_is_samedata(const MDBX_val *a, const MDBX_val *b) { + return a->iov_len == b->iov_len && + memcmp(a->iov_base, b->iov_base, a->iov_len) == 0; +} + +int mdbx_estimate_range(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *begin_key, + MDBX_val *begin_data, MDBX_val *end_key, + MDBX_val *end_data, ptrdiff_t *size_items) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!size_items)) + return MDBX_EINVAL; + + if (unlikely(begin_data && (begin_key == NULL || begin_key == MDBX_EPSILON))) + return MDBX_EINVAL; + + if (unlikely(end_data && (end_key == NULL || end_key == MDBX_EPSILON))) + return MDBX_EINVAL; + + if (unlikely(begin_key == MDBX_EPSILON && end_key == MDBX_EPSILON)) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + MDBX_cursor_couple begin; + /* LY: first, initialize cursor to refresh a DB in case it have DB_STALE */ + rc = mdbx_cursor_init(&begin.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(begin.outer.mc_db->md_entries == 0)) { + *size_items = 0; + return MDBX_SUCCESS; + } + + if (!begin_key) { + if (unlikely(!end_key)) { + /* LY: FIRST..LAST case */ + *size_items = (ptrdiff_t)begin.outer.mc_db->md_entries; + return MDBX_SUCCESS; + } + MDBX_val stub = {0, 0}; + rc = mdbx_cursor_first(&begin.outer, &stub, &stub); + if (unlikely(end_key == MDBX_EPSILON)) { + /* LY: FIRST..+epsilon case */ + return (rc == MDBX_SUCCESS) + ? mdbx_cursor_count(&begin.outer, (size_t *)size_items) + : rc; + } + } else { + if (unlikely(begin_key == MDBX_EPSILON)) { + if (end_key == NULL) { + /* LY: -epsilon..LAST case */ + MDBX_val stub = {0, 0}; + rc = mdbx_cursor_last(&begin.outer, &stub, &stub); + return (rc == MDBX_SUCCESS) + ? mdbx_cursor_count(&begin.outer, (size_t *)size_items) + : rc; + } + /* LY: -epsilon..value case */ + assert(end_key != MDBX_EPSILON); + begin_key = end_key; + } else if (unlikely(end_key == MDBX_EPSILON)) { + /* LY: value..+epsilon case */ + assert(begin_key != MDBX_EPSILON); + end_key = begin_key; + } + if (end_key && !begin_data && !end_data && + (begin_key == end_key || mdbx_is_samedata(begin_key, end_key))) { + /* LY: single key case */ + int exact = 0; + rc = mdbx_cursor_set(&begin.outer, begin_key, NULL, MDBX_SET, &exact); + if (unlikely(rc != MDBX_SUCCESS)) { + *size_items = 0; + return (rc == MDBX_NOTFOUND) ? MDBX_SUCCESS : rc; + } + *size_items = 1; + if (begin.outer.mc_xcursor != NULL) { + MDBX_node *node = page_node(begin.outer.mc_pg[begin.outer.mc_top], + begin.outer.mc_ki[begin.outer.mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + /* LY: return the number of duplicates for given key */ + mdbx_tassert(txn, + begin.outer.mc_xcursor == &begin.inner && + (begin.inner.mx_cursor.mc_flags & C_INITIALIZED)); + *size_items = + (sizeof(*size_items) >= sizeof(begin.inner.mx_db.md_entries) || + begin.inner.mx_db.md_entries <= PTRDIFF_MAX) + ? (size_t)begin.inner.mx_db.md_entries + : PTRDIFF_MAX; + } + } + return MDBX_SUCCESS; + } else { + rc = mdbx_cursor_set(&begin.outer, begin_key, begin_data, + begin_data ? MDBX_GET_BOTH_RANGE : MDBX_SET_RANGE, + NULL); + } + } + + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc != MDBX_NOTFOUND || !(begin.outer.mc_flags & C_INITIALIZED)) + return rc; + } + + MDBX_cursor_couple end; + rc = mdbx_cursor_init(&end.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + if (!end_key) { + MDBX_val stub = {0, 0}; + rc = mdbx_cursor_last(&end.outer, &stub, &stub); + } else { + rc = mdbx_cursor_set(&end.outer, end_key, end_data, + end_data ? MDBX_GET_BOTH_RANGE : MDBX_SET_RANGE, NULL); + } + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc != MDBX_NOTFOUND || !(end.outer.mc_flags & C_INITIALIZED)) + return rc; + } + + rc = mdbx_estimate_distance(&begin.outer, &end.outer, size_items); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + assert(*size_items >= -(ptrdiff_t)begin.outer.mc_db->md_entries && + *size_items <= (ptrdiff_t)begin.outer.mc_db->md_entries); + +#if 0 /* LY: Was decided to returns as-is (i.e. negative) the estimation \ + * results for an inverted ranges. */ + + /* Commit 8ddfd1f34ad7cf7a3c4aa75d2e248ca7e639ed63 + Change-Id: If59eccf7311123ab6384c4b93f9b1fed5a0a10d1 */ + + if (*size_items < 0) { + /* LY: inverted range case */ + *size_items += (ptrdiff_t)begin.outer.mc_db->md_entries; + } else if (*size_items == 0 && begin_key && end_key) { + int cmp = begin.outer.mc_dbx->md_cmp(&origin_begin_key, &origin_end_key); + if (cmp == 0 && (begin.inner.mx_cursor.mc_flags & C_INITIALIZED) && + begin_data && end_data) + cmp = begin.outer.mc_dbx->md_dcmp(&origin_begin_data, &origin_end_data); + if (cmp > 0) { + /* LY: inverted range case with empty scope */ + *size_items = (ptrdiff_t)begin.outer.mc_db->md_entries; + } + } + assert(*size_items >= 0 && + *size_items <= (ptrdiff_t)begin.outer.mc_db->md_entries); +#endif + + return MDBX_SUCCESS; +} + +//------------------------------------------------------------------------------ + +/* Позволяет обновить или удалить существующую запись с получением + * в old_data предыдущего значения данных. При этом если new_data равен + * нулю, то выполняется удаление, иначе обновление/вставка. + * + * Текущее значение может находиться в уже измененной (грязной) странице. + * В этом случае страница будет перезаписана при обновлении, а само старое + * значение утрачено. Поэтому исходно в old_data должен быть передан + * дополнительный буфер для копирования старого значения. + * Если переданный буфер слишком мал, то функция вернет -1, установив + * old_data->iov_len в соответствующее значение. + * + * Для не-уникальных ключей также возможен второй сценарий использования, + * когда посредством old_data из записей с одинаковым ключом для + * удаления/обновления выбирается конкретная. Для выбора этого сценария + * во flags следует одновременно указать MDBX_CURRENT и MDBX_NOOVERWRITE. + * Именно эта комбинация выбрана, так как она лишена смысла, и этим позволяет + * идентифицировать запрос такого сценария. + * + * Функция может быть замещена соответствующими операциями с курсорами + * после двух доработок (TODO): + * - внешняя аллокация курсоров, в том числе на стеке (без malloc). + * - получения статуса страницы по адресу (знать о P_DIRTY). + */ +int mdbx_replace(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, + MDBX_val *new_data, MDBX_val *old_data, unsigned flags) { + int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!key || !old_data || old_data == new_data)) + return MDBX_EINVAL; + + if (unlikely(old_data->iov_base == NULL && old_data->iov_len)) + return MDBX_EINVAL; + + if (unlikely(new_data == NULL && !(flags & MDBX_CURRENT))) + return MDBX_EINVAL; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(flags & ~(MDBX_NOOVERWRITE | MDBX_NODUPDATA | MDBX_RESERVE | + MDBX_APPEND | MDBX_APPENDDUP | MDBX_CURRENT))) + return MDBX_EINVAL; + + MDBX_cursor_couple cx; + rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + cx.outer.mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = &cx.outer; + + MDBX_val present_key = *key; + if (F_ISSET(flags, MDBX_CURRENT | MDBX_NOOVERWRITE)) { + /* в old_data значение для выбора конкретного дубликата */ + if (unlikely(!(txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT))) { + rc = MDBX_EINVAL; + goto bailout; + } + + /* убираем лишний бит, он был признаком запрошенного режима */ + flags -= MDBX_NOOVERWRITE; + + rc = mdbx_cursor_get(&cx.outer, &present_key, old_data, MDBX_GET_BOTH); + if (rc != MDBX_SUCCESS) + goto bailout; + + if (new_data) { + /* обновление конкретного дубликата */ + if (mdbx_is_samedata(old_data, new_data)) + /* если данные совпадают, то ничего делать не надо */ + goto bailout; + } + } else { + /* в old_data буфер для сохранения предыдущего значения */ + if (unlikely(new_data && old_data->iov_base == new_data->iov_base)) + return MDBX_EINVAL; + MDBX_val present_data; + rc = mdbx_cursor_get(&cx.outer, &present_key, &present_data, MDBX_SET_KEY); + if (unlikely(rc != MDBX_SUCCESS)) { + old_data->iov_base = NULL; + old_data->iov_len = 0; + if (rc != MDBX_NOTFOUND || (flags & MDBX_CURRENT)) + goto bailout; + } else if (flags & MDBX_NOOVERWRITE) { + rc = MDBX_KEYEXIST; + *old_data = present_data; + goto bailout; + } else { + MDBX_page *page = cx.outer.mc_pg[cx.outer.mc_top]; + if (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) { + if (flags & MDBX_CURRENT) { + /* для не-уникальных ключей позволяем update/delete только если ключ + * один */ + MDBX_node *node = page_node(page, cx.outer.mc_ki[cx.outer.mc_top]); + if (F_ISSET(node_flags(node), F_DUPDATA)) { + mdbx_tassert(txn, XCURSOR_INITED(&cx.outer) && + cx.outer.mc_xcursor->mx_db.md_entries > 1); + if (cx.outer.mc_xcursor->mx_db.md_entries > 1) { + rc = MDBX_EMULTIVAL; + goto bailout; + } + } + /* если данные совпадают, то ничего делать не надо */ + if (new_data && mdbx_is_samedata(&present_data, new_data)) { + *old_data = *new_data; + goto bailout; + } + /* В оригинальной LMDB флажок MDBX_CURRENT здесь приведет + * к замене данных без учета MDBX_DUPSORT сортировки, + * но здесь это в любом случае допустимо, так как мы + * проверили что для ключа есть только одно значение. */ + } else if ((flags & MDBX_NODUPDATA) && + mdbx_is_samedata(&present_data, new_data)) { + /* если данные совпадают и установлен MDBX_NODUPDATA */ + rc = MDBX_KEYEXIST; + goto bailout; + } + } else { + /* если данные совпадают, то ничего делать не надо */ + if (new_data && mdbx_is_samedata(&present_data, new_data)) { + *old_data = *new_data; + goto bailout; + } + flags |= MDBX_CURRENT; + } + + if (IS_DIRTY(page)) { + if (unlikely(old_data->iov_len < present_data.iov_len)) { + old_data->iov_base = NULL; + old_data->iov_len = present_data.iov_len; + rc = MDBX_RESULT_TRUE; + goto bailout; + } + memcpy(old_data->iov_base, present_data.iov_base, present_data.iov_len); + old_data->iov_len = present_data.iov_len; + } else { + *old_data = present_data; + } + } + } + + if (likely(new_data)) + rc = mdbx_cursor_put(&cx.outer, key, new_data, flags); + else + rc = mdbx_cursor_del(&cx.outer, 0); + +bailout: + txn->mt_cursors[dbi] = cx.outer.mc_next; + return rc; +} + +/* Функция сообщает находится ли указанный адрес в "грязной" странице у + * заданной пишущей транзакции. В конечном счете это позволяет избавиться от + * лишнего копирования данных из НЕ-грязных страниц. + * + * "Грязные" страницы - это те, которые уже были изменены в ходе пишущей + * транзакции. Соответственно, какие-либо дальнейшие изменения могут привести + * к перезаписи таких страниц. Поэтому все функции, выполняющие изменения, в + * качестве аргументов НЕ должны получать указатели на данные в таких + * страницах. В свою очередь "НЕ грязные" страницы перед модификацией будут + * скопированы. + * + * Другими словами, данные из "грязных" страниц должны быть либо скопированы + * перед передачей в качестве аргументов для дальнейших модификаций, либо + * отвергнуты на стадии проверки корректности аргументов. + * + * Таким образом, функция позволяет как избавиться от лишнего копирования, + * так и выполнить более полную проверку аргументов. + * + * ВАЖНО: Передаваемый указатель должен указывать на начало данных. Только + * так гарантируется что актуальный заголовок страницы будет физически + * расположен в той-же странице памяти, в том числе для многостраничных + * P_OVERFLOW страниц с длинными данными. */ +int mdbx_is_dirty(const MDBX_txn *txn, const void *ptr) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (txn->mt_flags & MDBX_RDONLY) + return MDBX_RESULT_FALSE; + + const MDBX_env *env = txn->mt_env; + const ptrdiff_t offset = (uint8_t *)ptr - env->me_map; + if (offset >= 0) { + const pgno_t pgno = bytes2pgno(env, offset); + if (likely(pgno < txn->mt_next_pgno)) { + const MDBX_page *page = pgno2page(env, pgno); + if (unlikely(page->mp_pgno != pgno)) { + /* The ptr pointed into middle of a large page, + * not to the beginning of a data. */ + return MDBX_EINVAL; + } + if (unlikely(page->mp_flags & (P_DIRTY | P_LOOSE | P_KEEP))) + return MDBX_RESULT_TRUE; + if (likely(txn->tw.spill_pages == nullptr)) + return MDBX_RESULT_FALSE; + return mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1) ? MDBX_RESULT_TRUE + : MDBX_RESULT_FALSE; + } + if ((size_t)offset < env->me_dxb_mmap.limit) { + /* Указатель адресует что-то в пределах mmap, но за границей + * распределенных страниц. Такое может случится если mdbx_is_dirty() + * вызывает после операции, в ходе которой гразная страница попала + * в loose и затем была возвращена в нераспределенное пространство. */ + return MDBX_RESULT_TRUE; + } + } + + /* Страница вне используемого mmap-диапазона, т.е. либо в функцию был + * передан некорректный адрес, либо адрес в теневой странице, которая была + * выделена посредством malloc(). + * + * Для WRITE_MAP режима такая страница однозначно "не грязная", + * а для режимов без WRITE_MAP следует просматривать списки dirty + * и spilled страниц у каких-либо транзакций (в том числе дочерних). + * + * Поэтому для WRITE_MAP возвращаем false, а для остальных режимов + * всегда true. Такая логика имеет ряд преимуществ: + * - не тратим время на просмотр списков; + * - результат всегда безопасен (может быть ложно-положительным, + * но не ложно-отрицательным); + * - результат не зависит от вложенности транзакций и от относительного + * положения переданной транзакции в этой рекурсии. */ + return (env->me_flags & MDBX_WRITEMAP) ? MDBX_RESULT_FALSE : MDBX_RESULT_TRUE; +} + +int mdbx_dbi_sequence(MDBX_txn *txn, MDBX_dbi dbi, uint64_t *result, + uint64_t increment) { + int rc = check_txn(txn, MDBX_TXN_BLOCKED); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(TXN_DBI_CHANGED(txn, dbi))) + return MDBX_BAD_DBI; + + if (unlikely(txn->mt_dbflags[dbi] & DB_STALE)) { + rc = mdbx_fetch_sdb(txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + } + + MDBX_db *dbs = &txn->mt_dbs[dbi]; + if (likely(result)) + *result = dbs->md_seq; + + if (likely(increment > 0)) { + if (unlikely(txn->mt_flags & MDBX_RDONLY)) + return MDBX_EACCESS; + + uint64_t new = dbs->md_seq + increment; + if (unlikely(new < increment)) + return MDBX_RESULT_TRUE; + + mdbx_tassert(txn, new > dbs->md_seq); + dbs->md_seq = new; + txn->mt_flags |= MDBX_TXN_DIRTY; + txn->mt_dbflags[dbi] |= DB_DIRTY; + } + + return MDBX_SUCCESS; +} + +/*----------------------------------------------------------------------------*/ + +__cold intptr_t mdbx_limits_dbsize_min(intptr_t pagesize) { + if (pagesize < 1) + pagesize = (intptr_t)mdbx_syspagesize(); + else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || + pagesize > (intptr_t)MAX_PAGESIZE || + !is_powerof2((size_t)pagesize))) + return -1; + + return MIN_PAGENO * pagesize; +} + +__cold intptr_t mdbx_limits_dbsize_max(intptr_t pagesize) { + if (pagesize < 1) + pagesize = (intptr_t)mdbx_syspagesize(); + else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || + pagesize > (intptr_t)MAX_PAGESIZE || + !is_powerof2((size_t)pagesize))) + return -1; + + const uint64_t limit = MAX_PAGENO * (uint64_t)pagesize; + return (limit < (intptr_t)MAX_MAPSIZE) ? (intptr_t)limit + : (intptr_t)MAX_MAPSIZE; +} + +__cold intptr_t mdbx_limits_txnsize_max(intptr_t pagesize) { + if (pagesize < 1) + pagesize = (intptr_t)mdbx_syspagesize(); + else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || + pagesize > (intptr_t)MAX_PAGESIZE || + !is_powerof2((size_t)pagesize))) + return -1; + + const uint64_t limit = pagesize * (uint64_t)(MDBX_DPL_TXNFULL - 1); + return (limit < (intptr_t)MAX_MAPSIZE) ? (intptr_t)limit + : (intptr_t)MAX_MAPSIZE; +} + +/*** Key-making functions to avoid custom comparators *************************/ + +static __always_inline uint64_t double2key(const double *const ptr) { + STATIC_ASSERT(sizeof(double) == sizeof(int64_t)); + const int64_t i64 = *(const int64_t *)ptr; + return (i64 >= 0) ? /* positive */ UINT64_C(0x8000000000000000) + i64 + : /* negative */ (uint64_t)-i64; +} + +static __always_inline uint32_t float2key(const float *const ptr) { + STATIC_ASSERT(sizeof(float) == sizeof(int32_t)); + const int32_t i32 = *(const int32_t *)ptr; + return (i32 >= 0) ? /* positive */ UINT32_C(0x80000000) + i32 + : /* negative */ (uint32_t)-i32; +} + +uint64_t mdbx_key_from_double(const double ieee754_64bit) { + return double2key(&ieee754_64bit); +} + +uint64_t mdbx_key_from_ptrdouble(const double *const ieee754_64bit) { + return double2key(ieee754_64bit); +} + +uint32_t mdbx_key_from_float(const float ieee754_32bit) { + return float2key(&ieee754_32bit); +} + +uint32_t mdbx_key_from_ptrfloat(const float *const ieee754_32bit) { + return float2key(ieee754_32bit); +} + +#define IEEE754_DOUBLE_MANTISSA_SIZE 52 +#define IEEE754_DOUBLE_BIAS 0x3FF +#define IEEE754_DOUBLE_MAX 0x7FF +#define IEEE754_DOUBLE_IMPLICIT_LEAD UINT64_C(0x0010000000000000) +#define IEEE754_DOUBLE_MANTISSA_MASK UINT64_C(0x000FFFFFFFFFFFFF) +#define IEEE754_DOUBLE_MANTISSA_AMAX UINT64_C(0x001FFFFFFFFFFFFF) + +static __inline int clz64(uint64_t value) { +#if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_clzl) + if (sizeof(value) == sizeof(int)) + return __builtin_clz(value); + if (sizeof(value) == sizeof(long)) + return __builtin_clzl(value); +#if (defined(__SIZEOF_LONG_LONG__) && __SIZEOF_LONG_LONG__ == 8) || \ + __has_builtin(__builtin_clzll) + return __builtin_clzll(value); +#endif /* have(long long) && long long == uint64_t */ +#endif /* GNU C */ + +#if defined(_MSC_VER) + unsigned long index; +#if defined(_M_AMD64) || defined(_M_ARM64) || defined(_M_X64) + _BitScanReverse64(&index, value); + return 63 - index; +#else + if (value > UINT32_MAX) { + _BitScanReverse(&index, (uint32_t)(value >> 32)); + return 31 - index; + } + _BitScanReverse(&index, (uint32_t)value); + return 63 - index; +#endif +#endif /* MSVC */ + + value |= value >> 1; + value |= value >> 2; + value |= value >> 4; + value |= value >> 8; + value |= value >> 16; + value |= value >> 32; + static const uint8_t debruijn_clz64[64] = { + 63, 16, 62, 7, 15, 36, 61, 3, 6, 14, 22, 26, 35, 47, 60, 2, + 9, 5, 28, 11, 13, 21, 42, 19, 25, 31, 34, 40, 46, 52, 59, 1, + 17, 8, 37, 4, 23, 27, 48, 10, 29, 12, 43, 20, 32, 41, 53, 18, + 38, 24, 49, 30, 44, 33, 54, 39, 50, 45, 55, 51, 56, 57, 58, 0}; + return debruijn_clz64[value * UINT64_C(0x03F79D71B4CB0A89) >> 58]; +} + +static uint64_t round_mantissa(const uint64_t u64, int shift) { + assert(shift < 0 && u64 > 0); + shift = -shift; + const unsigned half = 1 << (shift - 1); + const unsigned lsb = 1 & (unsigned)(u64 >> shift); + const unsigned tie2even = 1 ^ lsb; + return (u64 + half - tie2even) >> shift; +} + +uint64_t mdbx_key_from_jsonInteger(const int64_t json_integer) { + const uint64_t biased_zero = UINT64_C(0x8000000000000000); + if (json_integer > 0) { + const uint64_t u64 = json_integer; + int shift = clz64(u64) - (64 - IEEE754_DOUBLE_MANTISSA_SIZE - 1); + uint64_t mantissa = u64 << shift; + if (unlikely(shift < 0)) { + mantissa = round_mantissa(u64, shift); + if (mantissa > IEEE754_DOUBLE_MANTISSA_AMAX) + mantissa = round_mantissa(u64, --shift); + } + + assert(mantissa >= IEEE754_DOUBLE_IMPLICIT_LEAD && + mantissa <= IEEE754_DOUBLE_MANTISSA_AMAX); + const uint64_t exponent = + IEEE754_DOUBLE_BIAS + IEEE754_DOUBLE_MANTISSA_SIZE - shift; + assert(exponent > 0 && exponent <= IEEE754_DOUBLE_MAX); + const uint64_t key = biased_zero + + (exponent << IEEE754_DOUBLE_MANTISSA_SIZE) + + (mantissa - IEEE754_DOUBLE_IMPLICIT_LEAD); +#if !defined(_MSC_VER) || \ + defined( \ + _DEBUG) /* Workaround for MSVC error LNK2019: unresolved external \ + symbol __except1 referenced in function __ftol3_except */ + assert(key == mdbx_key_from_double((double)json_integer)); +#endif /* Workaround for MSVC */ + return key; + } + + if (json_integer < 0) { + const uint64_t u64 = -json_integer; + int shift = clz64(u64) - (64 - IEEE754_DOUBLE_MANTISSA_SIZE - 1); + uint64_t mantissa = u64 << shift; + if (unlikely(shift < 0)) { + mantissa = round_mantissa(u64, shift); + if (mantissa > IEEE754_DOUBLE_MANTISSA_AMAX) + mantissa = round_mantissa(u64, --shift); + } + + assert(mantissa >= IEEE754_DOUBLE_IMPLICIT_LEAD && + mantissa <= IEEE754_DOUBLE_MANTISSA_AMAX); + const uint64_t exponent = + IEEE754_DOUBLE_BIAS + IEEE754_DOUBLE_MANTISSA_SIZE - shift; + assert(exponent > 0 && exponent <= IEEE754_DOUBLE_MAX); + const uint64_t key = biased_zero - + (exponent << IEEE754_DOUBLE_MANTISSA_SIZE) - + (mantissa - IEEE754_DOUBLE_IMPLICIT_LEAD); +#if !defined(_MSC_VER) || \ + defined( \ + _DEBUG) /* Workaround for MSVC error LNK2019: unresolved external \ + symbol __except1 referenced in function __ftol3_except */ + assert(key == mdbx_key_from_double((double)json_integer)); +#endif /* Workaround for MSVC */ + return key; + } + + return biased_zero; +} + +/*** Attribute support functions for Nexenta **********************************/ +#ifdef MDBX_NEXENTA_ATTRS + +static __inline int mdbx_attr_peek(MDBX_val *data, mdbx_attr_t *attrptr) { + if (unlikely(data->iov_len < sizeof(mdbx_attr_t))) + return MDBX_INCOMPATIBLE; + + if (likely(attrptr != NULL)) + *attrptr = *(mdbx_attr_t *)data->iov_base; + data->iov_len -= sizeof(mdbx_attr_t); + data->iov_base = + likely(data->iov_len > 0) ? ((mdbx_attr_t *)data->iov_base) + 1 : NULL; + + return MDBX_SUCCESS; +} + +static __inline int mdbx_attr_poke(MDBX_val *reserved, MDBX_val *data, + mdbx_attr_t attr, unsigned flags) { + mdbx_attr_t *space = reserved->iov_base; + if (flags & MDBX_RESERVE) { + if (likely(data != NULL)) { + data->iov_base = data->iov_len ? space + 1 : NULL; + } + } else { + *space = attr; + if (likely(data != NULL)) { + memcpy(space + 1, data->iov_base, data->iov_len); + } + } + + return MDBX_SUCCESS; +} + +int mdbx_cursor_get_attr(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, + mdbx_attr_t *attrptr, MDBX_cursor_op op) { + int rc = mdbx_cursor_get(mc, key, data, op); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + return mdbx_attr_peek(data, attrptr); +} + +int mdbx_get_attr(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, + uint64_t *attrptr) { + int rc = mdbx_get(txn, dbi, key, data); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + return mdbx_attr_peek(data, attrptr); +} + +int mdbx_put_attr(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, + mdbx_attr_t attr, unsigned flags) { + MDBX_val reserve; + reserve.iov_base = NULL; + reserve.iov_len = (data ? data->iov_len : 0) + sizeof(mdbx_attr_t); + + int rc = mdbx_put(txn, dbi, key, &reserve, flags | MDBX_RESERVE); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + return mdbx_attr_poke(&reserve, data, attr, flags); +} + +int mdbx_cursor_put_attr(MDBX_cursor *cursor, MDBX_val *key, MDBX_val *data, + mdbx_attr_t attr, unsigned flags) { + MDBX_val reserve; + reserve.iov_base = NULL; + reserve.iov_len = (data ? data->iov_len : 0) + sizeof(mdbx_attr_t); + + int rc = mdbx_cursor_put(cursor, key, &reserve, flags | MDBX_RESERVE); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + return mdbx_attr_poke(&reserve, data, attr, flags); +} + +int mdbx_set_attr(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, + mdbx_attr_t attr) { + if (unlikely(!key || !txn)) + return MDBX_EINVAL; + + if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) + return MDBX_VERSION_MISMATCH; + + if (unlikely(!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))) + return MDBX_EINVAL; + + if (unlikely(txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) + return (txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; + + MDBX_cursor_couple cx; + MDBX_val old_data; + int rc = mdbx_cursor_init(&cx.outer, txn, dbi); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + rc = mdbx_cursor_set(&cx.outer, key, &old_data, MDBX_SET, NULL); + if (unlikely(rc != MDBX_SUCCESS)) { + if (rc == MDBX_NOTFOUND && data) { + cx.outer.mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = &cx.outer; + rc = mdbx_cursor_put_attr(&cx.outer, key, data, attr, 0); + txn->mt_cursors[dbi] = cx.outer.mc_next; + } + return rc; + } + + mdbx_attr_t old_attr = 0; + rc = mdbx_attr_peek(&old_data, &old_attr); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + + if (old_attr == attr && (!data || (data->iov_len == old_data.iov_len && + memcmp(data->iov_base, old_data.iov_base, + old_data.iov_len) == 0))) + return MDBX_SUCCESS; + + cx.outer.mc_next = txn->mt_cursors[dbi]; + txn->mt_cursors[dbi] = &cx.outer; + rc = mdbx_cursor_put_attr(&cx.outer, key, data ? data : &old_data, attr, + MDBX_CURRENT); + txn->mt_cursors[dbi] = cx.outer.mc_next; + return rc; +} +#endif /* MDBX_NEXENTA_ATTRS */ + +/******************************************************************************/ +/* *INDENT-OFF* */ +/* clang-format off */ + +__dll_export +#ifdef __attribute_used__ + __attribute_used__ +#elif defined(__GNUC__) || __has_attribute(__used__) + __attribute__((__used__)) +#endif +#ifdef __attribute_externally_visible__ + __attribute_externally_visible__ +#elif (defined(__GNUC__) && !defined(__clang__)) || \ + __has_attribute(__externally_visible__) + __attribute__((__externally_visible__)) +#endif + const mdbx_build_info mdbx_build = { +#ifdef MDBX_BUILD_TIMESTAMP + MDBX_BUILD_TIMESTAMP +#else + __DATE__ " " __TIME__ +#endif /* MDBX_BUILD_TIMESTAMP */ + + , +#ifdef MDBX_BUILD_TARGET + MDBX_BUILD_TARGET +#else + #if defined(__ANDROID_API__) + "Android" STRINGIFY(__ANDROID_API__) + #elif defined(__linux__) || defined(__gnu_linux__) + "Linux" + #elif defined(EMSCRIPTEN) || defined(__EMSCRIPTEN__) + "webassembly" + #elif defined(__CYGWIN__) + "CYGWIN" + #elif defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) \ + || defined(__WINDOWS__) + "Windows" + #elif defined(__APPLE__) + #if (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) \ + || (defined(TARGET_IPHONE_SIMULATOR) && TARGET_IPHONE_SIMULATOR) + "iOS" + #else + "MacOS" + #endif + #elif defined(__FreeBSD__) + "FreeBSD" + #elif defined(__DragonFly__) + "DragonFlyBSD" + #elif defined(__NetBSD__) + "NetBSD" + #elif defined(__OpenBSD__) + "OpenBSD" + #elif defined(__bsdi__) + "UnixBSDI" + #elif defined(__MACH__) + "MACH" + #elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) + "HPUX" + #elif defined(_AIX) + "AIX" + #elif defined(__sun) && defined(__SVR4) + "Solaris" + #elif defined(__BSD__) || defined(BSD) + "UnixBSD" + #elif defined(__unix__) || defined(UNIX) || defined(__unix) \ + || defined(__UNIX) || defined(__UNIX__) + "UNIX" + #elif defined(_POSIX_VERSION) + "POSIX" STRINGIFY(_POSIX_VERSION) + #else + "UnknownOS" + #endif /* Target OS */ + + "-" + + #if defined(__amd64__) + "AMD64" + #elif defined(__ia32__) + "IA32" + #elif defined(__e2k__) || defined(__elbrus__) + "Elbrus" + #elif defined(__alpha__) || defined(__alpha) || defined(_M_ALPHA) + "Alpha" + #elif defined(__aarch64__) || defined(_M_ARM64) + "ARM64" + #elif defined(__arm__) || defined(__thumb__) || defined(__TARGET_ARCH_ARM) \ + || defined(__TARGET_ARCH_THUMB) || defined(_ARM) || defined(_M_ARM) \ + || defined(_M_ARMT) || defined(__arm) + "ARM" + #elif defined(__mips64) || defined(__mips64__) || (defined(__mips) && (__mips >= 64)) + "MIPS64" + #elif if defined(__mips__) || defined(__mips) || defined(_R4000) || defined(__MIPS__) + "MIPS" + #elif defined(__hppa64__) || defined(__HPPA64__) || defined(__hppa64) + "PARISC64" + #elif defined(__hppa__) || defined(__HPPA__) || defined(__hppa) + "PARISC" + #elif defined(__ia64__) || defined(__ia64) || defined(_IA64) \ + || defined(__IA64__) || defined(_M_IA64) || defined(__itanium__) + "Itanium" + #elif defined(__powerpc64__) || defined(__ppc64__) || defined(__ppc64) \ + || defined(__powerpc64) || defined(_ARCH_PPC64) + "PowerPC64" + #elif defined(__powerpc__) || defined(__ppc__) || defined(__powerpc) \ + || defined(__ppc) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__POWERPC__) + "PowerPC" + #elif defined(__sparc64__) || defined(__sparc64) + "SPARC64" + #elif defined(__sparc__) || defined(__sparc) + "SPARC" + #elif defined(__s390__) || defined(__s390) || defined(__zarch__) || defined(__zarch) + "S390" + #else + "UnknownARCH" + #endif +#endif /* MDBX_BUILD_TARGET */ + +#ifdef MDBX_BUILD_TYPE +# if defined(_MSC_VER) +# pragma message("Configuration-depended MDBX_BUILD_TYPE: " MDBX_BUILD_TYPE) +# endif + "-" MDBX_BUILD_TYPE +#endif /* MDBX_BUILD_TYPE */ + , + "MDBX_DEBUG=" STRINGIFY(MDBX_DEBUG) +#ifdef MDBX_LOGLEVEL_BUILD + " MDBX_LOGLEVEL_BUILD=" STRINGIFY(MDBX_LOGLEVEL_BUILD) +#endif /* MDBX_LOGLEVEL_BUILD */ + " MDBX_WORDBITS=" STRINGIFY(MDBX_WORDBITS) + " BYTE_ORDER=" +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + "LITTLE_ENDIAN" +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + "BIG_ENDIAN" +#else + #error "FIXME: Unsupported byte order" +#endif /* __BYTE_ORDER__ */ + " MDBX_TXN_CHECKPID=" MDBX_TXN_CHECKPID_CONFIG + " MDBX_TXN_CHECKOWNER=" MDBX_TXN_CHECKOWNER_CONFIG + " MDBX_64BIT_ATOMIC=" MDBX_64BIT_ATOMIC_CONFIG + " MDBX_64BIT_CAS=" MDBX_64BIT_CAS_CONFIG + " MDBX_TRUST_RTC=" MDBX_TRUST_RTC_CONFIG +#ifdef __SANITIZE_ADDRESS__ + " SANITIZE_ADDRESS=YES" +#endif /* __SANITIZE_ADDRESS__ */ +#ifdef MDBX_USE_VALGRIND + " MDBX_USE_VALGRIND=YES" +#endif /* MDBX_USE_VALGRIND */ +#ifdef MDBX_FORCE_ASSERTIONS + " MDBX_FORCE_ASSERTIONS=YES" +#endif /* MDBX_FORCE_ASSERTIONS */ +#ifdef _GNU_SOURCE + " _GNU_SOURCE=YES" +#else + " _GNU_SOURCE=NO" +#endif /* _GNU_SOURCE */ +#ifdef __APPLE__ + " MDBX_OSX_SPEED_INSTEADOF_DURABILITY=" STRINGIFY(MDBX_OSX_SPEED_INSTEADOF_DURABILITY) +#endif /* MacOS */ +#if defined(_WIN32) || defined(_WIN64) + " MDBX_AVOID_CRT=" STRINGIFY(MDBX_AVOID_CRT) + " MDBX_CONFIG_MANUAL_TLS_CALLBACK=" STRINGIFY(MDBX_CONFIG_MANUAL_TLS_CALLBACK) + " MDBX_BUILD_SHARED_LIBRARY=" STRINGIFY(MDBX_BUILD_SHARED_LIBRARY) + " WINVER=" STRINGIFY(WINVER) +#else /* Windows */ + " MDBX_LOCKING=" MDBX_LOCKING_CONFIG + " MDBX_USE_OFDLOCKS=" MDBX_USE_OFDLOCKS_CONFIG +#endif /* !Windows */ + " MDBX_CACHELINE_SIZE=" STRINGIFY(MDBX_CACHELINE_SIZE) + " MDBX_CPU_WRITEBACK_INCOHERENT=" STRINGIFY(MDBX_CPU_WRITEBACK_INCOHERENT) + " MDBX_MMAP_INCOHERENT_CPU_CACHE=" STRINGIFY(MDBX_MMAP_INCOHERENT_CPU_CACHE) + " MDBX_MMAP_INCOHERENT_FILE_WRITE=" STRINGIFY(MDBX_MMAP_INCOHERENT_FILE_WRITE) + " MDBX_UNALIGNED_OK=" STRINGIFY(MDBX_UNALIGNED_OK) + " MDBX_PNL_ASCENDING=" STRINGIFY(MDBX_PNL_ASCENDING) + , +#ifdef MDBX_BUILD_COMPILER + MDBX_BUILD_COMPILER +#else + #ifdef __INTEL_COMPILER + "Intel C/C++ " STRINGIFY(__INTEL_COMPILER) + #elsif defined(__apple_build_version__) + "Apple clang " STRINGIFY(__apple_build_version__) + #elif defined(__ibmxl__) + "IBM clang C " STRINGIFY(__ibmxl_version__) "." STRINGIFY(__ibmxl_release__) + "." STRINGIFY(__ibmxl_modification__) "." STRINGIFY(__ibmxl_ptf_fix_level__) + #elif defined(__clang__) + "clang " STRINGIFY(__clang_version__) + #elif defined(__MINGW64__) + "MINGW-64 " STRINGIFY(__MINGW64_MAJOR_VERSION) "." STRINGIFY(__MINGW64_MINOR_VERSION) + #elif defined(__MINGW32__) + "MINGW-32 " STRINGIFY(__MINGW32_MAJOR_VERSION) "." STRINGIFY(__MINGW32_MINOR_VERSION) + #elif defined(__IBMC__) + "IBM C " STRINGIFY(__IBMC__) + #elif defined(__GNUC__) + "GNU C/C++ " + #ifdef __VERSION__ + __VERSION__ + #else + STRINGIFY(__GNUC__) "." STRINGIFY(__GNUC_MINOR__) "." STRINGIFY(__GNUC_PATCHLEVEL__) + #endif + #elif defined(_MSC_VER) + "MSVC " STRINGIFY(_MSC_FULL_VER) "-" STRINGIFY(_MSC_BUILD) + #else + "Unknown compiler" + #endif +#endif /* MDBX_BUILD_COMPILER */ + , +#ifdef MDBX_BUILD_FLAGS_CONFIG + MDBX_BUILD_FLAGS_CONFIG +#endif /* MDBX_BUILD_FLAGS_CONFIG */ +#ifdef MDBX_BUILD_FLAGS + MDBX_BUILD_FLAGS +#endif /* MDBX_BUILD_FLAGS */ +#if !(defined(MDBX_BUILD_FLAGS_CONFIG) || defined(MDBX_BUILD_FLAGS)) + "undefined (please use correct build script)" +#warning "Build flags undefined. Please use correct build script" +#endif +}; + +#ifdef __SANITIZE_ADDRESS__ +LIBMDBX_API __attribute__((__weak__)) const char *__asan_default_options() { + return "symbolize=1:allow_addr2line=1:" +#ifdef _DEBUG + "debug=1:" +#endif /* _DEBUG */ + "report_globals=1:" + "replace_str=1:replace_intrin=1:" + "malloc_context_size=9:" + "detect_leaks=1:" + "check_printf=1:" + "detect_deadlocks=1:" +#ifndef LTO_ENABLED + "check_initialization_order=1:" +#endif + "detect_stack_use_after_return=1:" + "intercept_tls_get_addr=1:" + "decorate_proc_maps=1:" + "abort_on_error=1"; +} +#endif /* __SANITIZE_ADDRESS__ */ + +/* *INDENT-ON* */ +/* clang-format on */ diff --git a/libs/libmdbx/src/src/debug_begin.h b/libs/libmdbx/src/src/debug_begin.h new file mode 100644 index 0000000000..f3306b5dc0 --- /dev/null +++ b/libs/libmdbx/src/src/debug_begin.h @@ -0,0 +1,34 @@ +#pragma push_macro("mdbx_trace") +#pragma push_macro("mdbx_debug") +#pragma push_macro("mdbx_verbose") +#pragma push_macro("mdbx_notice") +#pragma push_macro("mdbx_warning") +#pragma push_macro("mdbx_error") +#pragma push_macro("mdbx_assert") + +#undef mdbx_trace +#define mdbx_trace(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_TRACE, __func__, __LINE__, fmt "\n", __VA_ARGS__) + +#undef mdbx_debug +#define mdbx_debug(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_DEBUG, __func__, __LINE__, fmt "\n", __VA_ARGS__) + +#undef mdbx_verbose +#define mdbx_verbose(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_VERBOSE, __func__, __LINE__, fmt "\n", __VA_ARGS__) + +#undef mdbx_notice +#define mdbx_notice(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_NOTICE, __func__, __LINE__, fmt "\n", __VA_ARGS__) + +#undef mdbx_warning +#define mdbx_warning(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_WARN, __func__, __LINE__, fmt "\n", __VA_ARGS__) + +#undef mdbx_error +#define mdbx_error(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, fmt "\n", __VA_ARGS__) + +#undef mdbx_assert +#define mdbx_assert(env, expr) mdbx_ensure(env, expr) diff --git a/libs/libmdbx/src/src/debug_end.h b/libs/libmdbx/src/src/debug_end.h new file mode 100644 index 0000000000..e361119bc0 --- /dev/null +++ b/libs/libmdbx/src/src/debug_end.h @@ -0,0 +1,7 @@ +#pragma pop_macro("mdbx_trace") +#pragma pop_macro("mdbx_debug") +#pragma pop_macro("mdbx_verbose") +#pragma pop_macro("mdbx_notice") +#pragma pop_macro("mdbx_warning") +#pragma pop_macro("mdbx_error") +#pragma pop_macro("mdbx_assert") diff --git a/libs/libmdbx/src/src/defs.h b/libs/libmdbx/src/src/defs.h new file mode 100644 index 0000000000..b2710eede8 --- /dev/null +++ b/libs/libmdbx/src/src/defs.h @@ -0,0 +1,425 @@ +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + */ + +#pragma once +/* *INDENT-OFF* */ +/* clang-format off */ + +#ifndef __GNUC_PREREQ +# if defined(__GNUC__) && defined(__GNUC_MINOR__) +# define __GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) +# else +# define __GNUC_PREREQ(maj, min) (0) +# endif +#endif /* __GNUC_PREREQ */ + +#ifndef __CLANG_PREREQ +# ifdef __clang__ +# define __CLANG_PREREQ(maj,min) \ + ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min)) +# else +# define __CLANG_PREREQ(maj,min) (0) +# endif +#endif /* __CLANG_PREREQ */ + +#ifndef __GLIBC_PREREQ +# if defined(__GLIBC__) && defined(__GLIBC_MINOR__) +# define __GLIBC_PREREQ(maj, min) \ + ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min)) +# else +# define __GLIBC_PREREQ(maj, min) (0) +# endif +#endif /* __GLIBC_PREREQ */ + +#ifndef __has_attribute +# define __has_attribute(x) (0) +#endif + +#ifndef __has_feature +# define __has_feature(x) (0) +#endif + +#ifndef __has_extension +# define __has_extension(x) (0) +#endif + +#ifndef __has_builtin +# define __has_builtin(x) (0) +#endif + +#ifndef __has_warning +# define __has_warning(x) (0) +#endif + +#ifndef __has_include +# define __has_include(x) (0) +#endif + +#if __has_feature(thread_sanitizer) +# define __SANITIZE_THREAD__ 1 +#endif + +#if __has_feature(address_sanitizer) +# define __SANITIZE_ADDRESS__ 1 +#endif + +/*----------------------------------------------------------------------------*/ + +#ifndef __extern_C +# ifdef __cplusplus +# define __extern_C extern "C" +# else +# define __extern_C +# endif +#endif /* __extern_C */ + +#ifndef __cplusplus +# ifndef bool +# define bool _Bool +# endif +# ifndef true +# define true (1) +# endif +# ifndef false +# define false (0) +# endif +#endif + +#if !defined(nullptr) && !defined(__cplusplus) || (__cplusplus < 201103L && !defined(_MSC_VER)) +# define nullptr NULL +#endif + +/*----------------------------------------------------------------------------*/ + +#ifndef __always_inline +# if defined(__GNUC__) || __has_attribute(__always_inline__) +# define __always_inline __inline __attribute__((__always_inline__)) +# elif defined(_MSC_VER) +# define __always_inline __forceinline +# else +# define __always_inline +# endif +#endif /* __always_inline */ + +#ifndef __noinline +# if defined(__GNUC__) || __has_attribute(__noinline__) +# define __noinline __attribute__((__noinline__)) +# elif defined(_MSC_VER) +# define __noinline __declspec(noinline) +# else +# define __noinline +# endif +#endif /* __noinline */ + +#ifndef __must_check_result +# if defined(__GNUC__) || __has_attribute(__warn_unused_result__) +# define __must_check_result __attribute__((__warn_unused_result__)) +# else +# define __must_check_result +# endif +#endif /* __must_check_result */ + +#ifndef __maybe_unused +# if defined(__GNUC__) || __has_attribute(__unused__) +# define __maybe_unused __attribute__((__unused__)) +# else +# define __maybe_unused +# endif +#endif /* __maybe_unused */ + +#if !defined(__noop) && !defined(_MSC_VER) +# define __noop(...) do {} while(0) +#endif /* __noop */ + +#ifndef __fallthrough +# if __GNUC_PREREQ(7, 0) || __has_attribute(__fallthrough__) +# define __fallthrough __attribute__((__fallthrough__)) +# else +# define __fallthrough __noop() +# endif +#endif /* __fallthrough */ + +#ifndef __unreachable +# if __GNUC_PREREQ(4,5) || __has_builtin(__builtin_unreachable) +# define __unreachable() __builtin_unreachable() +# elif defined(_MSC_VER) +# define __unreachable() __assume(0) +# else +# define __unreachable() __noop() +# endif +#endif /* __unreachable */ + +#ifndef __prefetch +# if defined(__GNUC__) || defined(__clang__) || __has_builtin(__builtin_prefetch) +# define __prefetch(ptr) __builtin_prefetch(ptr) +# else +# define __prefetch(ptr) __noop(ptr) +# endif +#endif /* __prefetch */ + +#ifndef __noreturn +# if defined(__GNUC__) || __has_attribute(__noreturn__) +# define __noreturn __attribute__((__noreturn__)) +# elif defined(_MSC_VER) +# define __noreturn __declspec(noreturn) +# else +# define __noreturn +# endif +#endif /* __noreturn */ + +#ifndef __nothrow +# if defined(__cplusplus) +# if __cplusplus < 201703L +# define __nothrow throw() +# else +# define __nothrow noexcept(true) +# endif /* __cplusplus */ +# elif defined(__GNUC__) || __has_attribute(__nothrow__) +# define __nothrow __attribute__((__nothrow__)) +# elif defined(_MSC_VER) && defined(__cplusplus) +# define __nothrow __declspec(nothrow) +# else +# define __nothrow +# endif +#endif /* __nothrow */ + +#ifndef __pure_function + /* Many functions have no effects except the return value and their + * return value depends only on the parameters and/or global variables. + * Such a function can be subject to common subexpression elimination + * and loop optimization just as an arithmetic operator would be. + * These functions should be declared with the attribute pure. */ +# if defined(__GNUC__) || __has_attribute(__pure__) +# define __pure_function __attribute__((__pure__)) +# else +# define __pure_function +# endif +#endif /* __pure_function */ + +#ifndef __const_function + /* Many functions do not examine any values except their arguments, + * and have no effects except the return value. Basically this is just + * slightly more strict class than the PURE attribute, since function + * is not allowed to read global memory. + * + * Note that a function that has pointer arguments and examines the + * data pointed to must not be declared const. Likewise, a function + * that calls a non-const function usually must not be const. + * It does not make sense for a const function to return void. */ +# if defined(__GNUC__) || __has_attribute(__const__) +# define __const_function __attribute__((__const__)) +# else +# define __const_function +# endif +#endif /* __const_function */ + +#ifndef __hidden +# if defined(__GNUC__) || __has_attribute(__visibility__) +# define __hidden __attribute__((__visibility__("hidden"))) +# else +# define __hidden +# endif +#endif /* __hidden */ + +#ifndef __optimize +# if defined(__OPTIMIZE__) +# if (defined(__GNUC__) && !defined(__clang__)) || __has_attribute(__optimize__) +# define __optimize(ops) __attribute__((__optimize__(ops))) +# else +# define __optimize(ops) +# endif +# else +# define __optimize(ops) +# endif +#endif /* __optimize */ + +#ifndef __hot +# if defined(__OPTIMIZE__) +# if defined(__e2k__) +# define __hot __attribute__((__hot__)) __optimize(3) +# elif defined(__clang__) && !__has_attribute(__hot_) \ + && __has_attribute(__section__) && (defined(__linux__) || defined(__gnu_linux__)) + /* just put frequently used functions in separate section */ +# define __hot __attribute__((__section__("text.hot"))) __optimize("O3") +# elif defined(__GNUC__) || __has_attribute(__hot__) +# define __hot __attribute__((__hot__)) __optimize("O3") +# else +# define __hot __optimize("O3") +# endif +# else +# define __hot +# endif +#endif /* __hot */ + +#ifndef __cold +# if defined(__OPTIMIZE__) +# if defined(__e2k__) +# define __cold __attribute__((__cold__)) __optimize(1) +# elif defined(__clang__) && !__has_attribute(cold) \ + && __has_attribute(__section__) && (defined(__linux__) || defined(__gnu_linux__)) + /* just put infrequently used functions in separate section */ +# define __cold __attribute__((__section__("text.unlikely"))) __optimize("Os") +# elif defined(__GNUC__) || __has_attribute(cold) +# define __cold __attribute__((__cold__)) __optimize("Os") +# else +# define __cold __optimize("Os") +# endif +# else +# define __cold +# endif +#endif /* __cold */ + +#ifndef __flatten +# if defined(__OPTIMIZE__) && (defined(__GNUC__) || __has_attribute(__flatten__)) +# define __flatten __attribute__((__flatten__)) +# else +# define __flatten +# endif +#endif /* __flatten */ + +#ifndef likely +# if (defined(__GNUC__) || __has_builtin(__builtin_expect)) && !defined(__COVERITY__) +# define likely(cond) __builtin_expect(!!(cond), 1) +# else +# define likely(x) (x) +# endif +#endif /* likely */ + +#ifndef unlikely +# if (defined(__GNUC__) || __has_builtin(__builtin_expect)) && !defined(__COVERITY__) +# define unlikely(cond) __builtin_expect(!!(cond), 0) +# else +# define unlikely(x) (x) +# endif +#endif /* unlikely */ + +#ifndef __printf_args +# if defined(__GNUC__) || __has_attribute(__format__) +# define __printf_args(format_index, first_arg) \ + __attribute__((__format__(__printf__, format_index, first_arg))) +# else +# define __printf_args(format_index, first_arg) +# endif +#endif /* __printf_args */ + +#ifndef __anonymous_struct_extension__ +# if defined(__GNUC__) +# define __anonymous_struct_extension__ __extension__ +# else +# define __anonymous_struct_extension__ +# endif +#endif /* __anonymous_struct_extension__ */ + +#ifndef __Wpedantic_format_voidptr + static __inline __maybe_unused const void* __pure_function + __Wpedantic_format_voidptr(const void* ptr) {return ptr;} +# define __Wpedantic_format_voidptr(ARG) __Wpedantic_format_voidptr(ARG) +#endif /* __Wpedantic_format_voidptr */ + +/*----------------------------------------------------------------------------*/ + +#if defined(MDBX_USE_VALGRIND) +# include +# ifndef VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE + /* LY: available since Valgrind 3.10 */ +# define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) +# define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) +# endif +#elif !defined(RUNNING_ON_VALGRIND) +# define VALGRIND_CREATE_MEMPOOL(h,r,z) +# define VALGRIND_DESTROY_MEMPOOL(h) +# define VALGRIND_MEMPOOL_TRIM(h,a,s) +# define VALGRIND_MEMPOOL_ALLOC(h,a,s) +# define VALGRIND_MEMPOOL_FREE(h,a) +# define VALGRIND_MEMPOOL_CHANGE(h,a,b,s) +# define VALGRIND_MAKE_MEM_NOACCESS(a,s) +# define VALGRIND_MAKE_MEM_DEFINED(a,s) +# define VALGRIND_MAKE_MEM_UNDEFINED(a,s) +# define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) +# define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) +# define VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a,s) (0) +# define VALGRIND_CHECK_MEM_IS_DEFINED(a,s) (0) +# define RUNNING_ON_VALGRIND (0) +#endif /* MDBX_USE_VALGRIND */ + +#ifdef __SANITIZE_ADDRESS__ +# include +#elif !defined(ASAN_POISON_MEMORY_REGION) +# define ASAN_POISON_MEMORY_REGION(addr, size) \ + ((void)(addr), (void)(size)) +# define ASAN_UNPOISON_MEMORY_REGION(addr, size) \ + ((void)(addr), (void)(size)) +#endif /* __SANITIZE_ADDRESS__ */ + +/*----------------------------------------------------------------------------*/ + +#ifndef ARRAY_LENGTH +# ifdef __cplusplus + template + char (&__ArraySizeHelper(T (&array)[N]))[N]; +# define ARRAY_LENGTH(array) (sizeof(::__ArraySizeHelper(array))) +# else +# define ARRAY_LENGTH(array) (sizeof(array) / sizeof(array[0])) +# endif +#endif /* ARRAY_LENGTH */ + +#ifndef ARRAY_END +# define ARRAY_END(array) (&array[ARRAY_LENGTH(array)]) +#endif /* ARRAY_END */ + +#ifndef STRINGIFY +# define STRINGIFY_HELPER(x) #x +# define STRINGIFY(x) STRINGIFY_HELPER(x) +#endif /* STRINGIFY */ + +#define CONCAT(a,b) a##b +#define XCONCAT(a,b) CONCAT(a,b) + +#ifndef offsetof +# define offsetof(type, member) __builtin_offsetof(type, member) +#endif /* offsetof */ + +#ifndef container_of +# define container_of(ptr, type, member) \ + ((type *)((char *)(ptr) - offsetof(type, member))) +#endif /* container_of */ + +#define MDBX_TETRAD(a, b, c, d) \ + ((uint32_t)(a) << 24 | (uint32_t)(b) << 16 | (uint32_t)(c) << 8 | (d)) + +#define MDBX_STRING_TETRAD(str) MDBX_TETRAD(str[0], str[1], str[2], str[3]) + +#define FIXME "FIXME: " __FILE__ ", " STRINGIFY(__LINE__) + +#ifndef STATIC_ASSERT_MSG +# if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \ + || __has_feature(c_static_assert) +# define STATIC_ASSERT_MSG(expr, msg) _Static_assert(expr, msg) +# elif defined(static_assert) +# define STATIC_ASSERT_MSG(expr, msg) static_assert(expr, msg) +# elif defined(_MSC_VER) +# include +# define STATIC_ASSERT_MSG(expr, msg) _STATIC_ASSERT(expr) +# else +# define STATIC_ASSERT_MSG(expr, msg) switch (0) {case 0:case (expr):;} +# endif +#endif /* STATIC_ASSERT */ + +#ifndef STATIC_ASSERT +# define STATIC_ASSERT(expr) STATIC_ASSERT_MSG(expr, #expr) +#endif + +/* *INDENT-ON* */ +/* clang-format on */ diff --git a/libs/libmdbx/src/src/elements/config.h b/libs/libmdbx/src/src/elements/config.h deleted file mode 100644 index f05ba6fc85..0000000000 --- a/libs/libmdbx/src/src/elements/config.h +++ /dev/null @@ -1,56 +0,0 @@ -/* This is CMake-template for libmdbx's config.h - ******************************************************************************/ - -/* *INDENT-OFF* */ -/* clang-format off */ - -/* #undef HAVE_VALGRIND_MEMCHECK_H */ -/* #undef HAS_RELAXED_CONSTEXPR */ - -#define LTO_ENABLED -/* #undef MDBX_USE_VALGRIND */ -/* #undef ENABLE_GPROF */ -/* #undef ENABLE_GCOV */ -/* #undef ENABLE_ASAN */ -/* #undef MDBX_FORCE_ASSERTIONS */ - -/* Common */ -#define MDBX_TXN_CHECKOWNER 1 -#define MDBX_TXN_CHECKPID_AUTO -#ifndef MDBX_TXN_CHECKPID_AUTO -#define MDBX_TXN_CHECKPID 0 -#endif -#define MDBX_BUILD_SHARED_LIBRARY 1 -#define MDBX_LOCKING_AUTO -#ifndef MDBX_LOCKING_AUTO -/* #undef MDBX_LOCKING */ -#endif -#define MDBX_TRUST_RTC_AUTO -#ifndef MDBX_TRUST_RTC_AUTO -#define MDBX_TRUST_RTC 0 -#endif - -/* Windows */ -#define MDBX_CONFIG_MANUAL_TLS_CALLBACK 0 -#define MDBX_AVOID_CRT 1 - -/* MacOS */ -#define MDBX_OSX_SPEED_INSTEADOF_DURABILITY 0 - -/* POSIX */ -#define MDBX_DISABLE_GNU_SOURCE 0 -/* #undef MDBX_USE_OFDLOCKS_AUTO */ -#ifndef MDBX_USE_OFDLOCKS_AUTO -#define MDBX_USE_OFDLOCKS 0 -#endif - -/* Build Info */ -#define MDBX_BUILD_TIMESTAMP "2020-03-20T14:47:36Z" -#define MDBX_BUILD_TARGET "x86_64-Windows" -/* #undef MDBX_BUILD_CONFIG */ -#define MDBX_BUILD_COMPILER "MSVC-19.25.28610.4" -#define MDBX_BUILD_FLAGS "LIBMDBX_EXPORTS" -#define MDBX_BUILD_SOURCERY b8a401ae08d0312d6e5365c29bb58adea2e44dbc7e3d808df4a0de2fefcc65ca_v0_6_0_45_gc20ba1e - -/* *INDENT-ON* */ -/* clang-format on */ diff --git a/libs/libmdbx/src/src/elements/config.h.in b/libs/libmdbx/src/src/elements/config.h.in deleted file mode 100644 index b8776d98a2..0000000000 --- a/libs/libmdbx/src/src/elements/config.h.in +++ /dev/null @@ -1,56 +0,0 @@ -/* This is CMake-template for libmdbx's config.h - ******************************************************************************/ - -/* *INDENT-OFF* */ -/* clang-format off */ - -#cmakedefine HAVE_VALGRIND_MEMCHECK_H -#cmakedefine HAS_RELAXED_CONSTEXPR - -#cmakedefine LTO_ENABLED -#cmakedefine MDBX_USE_VALGRIND -#cmakedefine ENABLE_GPROF -#cmakedefine ENABLE_GCOV -#cmakedefine ENABLE_ASAN -#cmakedefine MDBX_FORCE_ASSERTIONS - -/* Common */ -#cmakedefine01 MDBX_TXN_CHECKOWNER -#cmakedefine MDBX_TXN_CHECKPID_AUTO -#ifndef MDBX_TXN_CHECKPID_AUTO -#cmakedefine01 MDBX_TXN_CHECKPID -#endif -#cmakedefine01 MDBX_BUILD_SHARED_LIBRARY -#cmakedefine MDBX_LOCKING_AUTO -#ifndef MDBX_LOCKING_AUTO -#cmakedefine MDBX_LOCKING @MDBX_LOCKING@ -#endif -#cmakedefine MDBX_TRUST_RTC_AUTO -#ifndef MDBX_TRUST_RTC_AUTO -#cmakedefine01 MDBX_TRUST_RTC -#endif - -/* Windows */ -#cmakedefine01 MDBX_CONFIG_MANUAL_TLS_CALLBACK -#cmakedefine01 MDBX_AVOID_CRT - -/* MacOS */ -#cmakedefine01 MDBX_OSX_SPEED_INSTEADOF_DURABILITY - -/* POSIX */ -#cmakedefine01 MDBX_DISABLE_GNU_SOURCE -#cmakedefine MDBX_USE_OFDLOCKS_AUTO -#ifndef MDBX_USE_OFDLOCKS_AUTO -#cmakedefine01 MDBX_USE_OFDLOCKS -#endif - -/* Build Info */ -#cmakedefine MDBX_BUILD_TIMESTAMP "@MDBX_BUILD_TIMESTAMP@" -#cmakedefine MDBX_BUILD_TARGET "@MDBX_BUILD_TARGET@" -#cmakedefine MDBX_BUILD_CONFIG "@MDBX_BUILD_CONFIG@" -#cmakedefine MDBX_BUILD_COMPILER "@MDBX_BUILD_COMPILER@" -#cmakedefine MDBX_BUILD_FLAGS "@MDBX_BUILD_FLAGS@" -#cmakedefine MDBX_BUILD_SOURCERY @MDBX_BUILD_SOURCERY@ - -/* *INDENT-ON* */ -/* clang-format on */ diff --git a/libs/libmdbx/src/src/elements/core.c b/libs/libmdbx/src/src/elements/core.c deleted file mode 100644 index 6a5b079493..0000000000 --- a/libs/libmdbx/src/src/elements/core.c +++ /dev/null @@ -1,18301 +0,0 @@ -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * This code is derived from "LMDB engine" written by - * Howard Chu (Symas Corporation), which itself derived from btree.c - * written by Martin Hedenfalk. - * - * --- - * - * Portions Copyright 2011-2015 Howard Chu, Symas Corp. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - * - * --- - * - * Portions Copyright (c) 2009, 2010 Martin Hedenfalk - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ - -#include "internals.h" - -/*------------------------------------------------------------------------------ - * Internal inlines */ - -static __pure_function unsigned log2n(size_t value) { - assert(value > 0 && value < INT32_MAX && is_powerof2(value)); - assert((value & -(int32_t)value) == value); -#if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_ctzl) - return __builtin_ctzl(value); -#elif defined(_MSC_VER) - unsigned long index; - _BitScanForward(&index, (unsigned long)value); - return index; -#else - static const uint8_t debruijn_ctz32[32] = { - 0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8, - 31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9}; - return debruijn_ctz32[(uint32_t)(value * 0x077CB531u) >> 27]; -#endif -} - -/*------------------------------------------------------------------------------ - * Unaligned access */ - -static __pure_function __maybe_unused __always_inline unsigned -field_alignment(unsigned alignment_baseline, size_t field_offset) { - unsigned merge = alignment_baseline | (unsigned)field_offset; - return merge & -(int)merge; -} - -/* read-thunk for UB-sanitizer */ -static __pure_function __always_inline uint8_t -peek_u8(const uint8_t *const __restrict ptr) { - return *ptr; -} - -/* write-thunk for UB-sanitizer */ -static __always_inline void poke_u8(uint8_t *const __restrict ptr, - const uint8_t v) { - *ptr = v; -} - -static __pure_function __always_inline uint16_t -unaligned_peek_u16(const unsigned expected_alignment, const void *const ptr) { - assert((uintptr_t)ptr % expected_alignment == 0); - if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(uint16_t)) == 0) - return *(const uint16_t *)ptr; - else { - uint16_t v; - memcpy(&v, ptr, sizeof(v)); - return v; - } -} - -static __always_inline void -unaligned_poke_u16(const unsigned expected_alignment, - void *const __restrict ptr, const uint16_t v) { - assert((uintptr_t)ptr % expected_alignment == 0); - if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(v)) == 0) - *(uint16_t *)ptr = v; - else - memcpy(ptr, &v, sizeof(v)); -} - -static __pure_function __always_inline uint32_t unaligned_peek_u32( - const unsigned expected_alignment, const void *const __restrict ptr) { - assert((uintptr_t)ptr % expected_alignment == 0); - if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(uint32_t)) == 0) - return *(const uint32_t *)ptr; - else if ((expected_alignment % sizeof(uint16_t)) == 0) { - const uint16_t lo = - ((const uint16_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__]; - const uint16_t hi = - ((const uint16_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__]; - return lo | (uint32_t)hi << 16; - } else { - uint32_t v; - memcpy(&v, ptr, sizeof(v)); - return v; - } -} - -static __always_inline void -unaligned_poke_u32(const unsigned expected_alignment, - void *const __restrict ptr, const uint32_t v) { - assert((uintptr_t)ptr % expected_alignment == 0); - if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(v)) == 0) - *(uint32_t *)ptr = v; - else if ((expected_alignment % sizeof(uint16_t)) == 0) { - ((uint16_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__] = (uint16_t)v; - ((uint16_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__] = - (uint16_t)(v >> 16); - } else - memcpy(ptr, &v, sizeof(v)); -} - -static __pure_function __always_inline uint64_t unaligned_peek_u64( - const unsigned expected_alignment, const void *const __restrict ptr) { - assert((uintptr_t)ptr % expected_alignment == 0); - if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(uint64_t)) == 0) - return *(const uint64_t *)ptr; - else if ((expected_alignment % sizeof(uint32_t)) == 0) { - const uint32_t lo = - ((const uint32_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__]; - const uint32_t hi = - ((const uint32_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__]; - return lo | (uint64_t)hi << 32; - } else { - uint64_t v; - memcpy(&v, ptr, sizeof(v)); - return v; - } -} - -static __always_inline void -unaligned_poke_u64(const unsigned expected_alignment, - void *const __restrict ptr, const uint64_t v) { - assert((uintptr_t)ptr % expected_alignment == 0); - if (MDBX_UNALIGNED_OK || (expected_alignment % sizeof(v)) == 0) - *(uint64_t *)ptr = v; - else if ((expected_alignment % sizeof(uint32_t)) == 0) { - ((uint32_t *)ptr)[__BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__] = (uint32_t)v; - ((uint32_t *)ptr)[__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__] = - (uint32_t)(v >> 32); - } else - memcpy(ptr, &v, sizeof(v)); -} - -#define UNALIGNED_PEEK_8(ptr, struct, field) \ - peek_u8((const uint8_t *)(ptr) + offsetof(struct, field)) -#define UNALIGNED_POKE_8(ptr, struct, field, value) \ - poke_u8((uint8_t *)(ptr) + offsetof(struct, field), value) - -#define UNALIGNED_PEEK_16(ptr, struct, field) \ - unaligned_peek_u16(1, (const char *)(ptr) + offsetof(struct, field)) -#define UNALIGNED_POKE_16(ptr, struct, field, value) \ - unaligned_poke_u16(1, (char *)(ptr) + offsetof(struct, field), value) - -#define UNALIGNED_PEEK_32(ptr, struct, field) \ - unaligned_peek_u32(1, (const char *)(ptr) + offsetof(struct, field)) -#define UNALIGNED_POKE_32(ptr, struct, field, value) \ - unaligned_poke_u32(1, (char *)(ptr) + offsetof(struct, field), value) - -#define UNALIGNED_PEEK_64(ptr, struct, field) \ - unaligned_peek_u64(1, (const char *)(ptr) + offsetof(struct, field)) -#define UNALIGNED_POKE_64(ptr, struct, field, value) \ - unaligned_poke_u64(1, (char *)(ptr) + offsetof(struct, field), value) - -/* Get the page number pointed to by a branch node */ -static __pure_function __always_inline pgno_t -node_pgno(const MDBX_node *const __restrict node) { - pgno_t pgno = UNALIGNED_PEEK_32(node, MDBX_node, mn_pgno32); - if (sizeof(pgno) > 4) - pgno |= ((uint64_t)UNALIGNED_PEEK_8(node, MDBX_node, mn_extra)) << 32; - return pgno; -} - -/* Set the page number in a branch node */ -static __always_inline void node_set_pgno(MDBX_node *const __restrict node, - pgno_t pgno) { - assert(pgno >= MIN_PAGENO && pgno <= MAX_PAGENO); - - UNALIGNED_POKE_32(node, MDBX_node, mn_pgno32, (uint32_t)pgno); - if (sizeof(pgno) > 4) - UNALIGNED_POKE_8(node, MDBX_node, mn_extra, - (uint8_t)((uint64_t)pgno >> 32)); -} - -/* Get the size of the data in a leaf node */ -static __pure_function __always_inline size_t -node_ds(const MDBX_node *const __restrict node) { - return UNALIGNED_PEEK_32(node, MDBX_node, mn_dsize); -} - -/* Set the size of the data for a leaf node */ -static __always_inline void node_set_ds(MDBX_node *const __restrict node, - size_t size) { - assert(size < INT_MAX); - UNALIGNED_POKE_32(node, MDBX_node, mn_dsize, (uint32_t)size); -} - -/* The size of a key in a node */ -static __pure_function __always_inline size_t -node_ks(const MDBX_node *const __restrict node) { - return UNALIGNED_PEEK_16(node, MDBX_node, mn_ksize); -} - -/* Set the size of the key for a leaf node */ -static __always_inline void node_set_ks(MDBX_node *const __restrict node, - size_t size) { - assert(size < INT16_MAX); - UNALIGNED_POKE_16(node, MDBX_node, mn_ksize, (uint16_t)size); -} - -static __pure_function __always_inline uint8_t -node_flags(const MDBX_node *const __restrict node) { - return UNALIGNED_PEEK_8(node, MDBX_node, mn_flags); -} - -static __always_inline void node_set_flags(MDBX_node *const __restrict node, - uint8_t flags) { - UNALIGNED_POKE_8(node, MDBX_node, mn_flags, flags); -} - -/* Size of the node header, excluding dynamic data at the end */ -#define NODESIZE offsetof(MDBX_node, mn_data) - -/* Address of the key for the node */ -static __pure_function __always_inline void * -node_key(const MDBX_node *const __restrict node) { - return (char *)node + NODESIZE; -} - -/* Address of the data for a node */ -static __pure_function __always_inline void * -node_data(const MDBX_node *const __restrict node) { - return (char *)node_key(node) + node_ks(node); -} - -/* Size of a node in a leaf page with a given key and data. - * This is node header plus key plus data size. */ -static __pure_function __always_inline size_t -node_size_len(const size_t key_len, const size_t value_len) { - return NODESIZE + EVEN(key_len + value_len); -} -static __pure_function __always_inline size_t node_size(const MDBX_val *key, - const MDBX_val *value) { - return node_size_len(key ? key->iov_len : 0, value ? value->iov_len : 0); -} - -static __pure_function __always_inline pgno_t -peek_pgno(const void *const __restrict ptr) { - if (sizeof(pgno_t) == sizeof(uint32_t)) - return (pgno_t)unaligned_peek_u32(1, ptr); - else if (sizeof(pgno_t) == sizeof(uint64_t)) - return (pgno_t)unaligned_peek_u64(1, ptr); - else { - pgno_t pgno; - memcpy(&pgno, ptr, sizeof(pgno)); - return pgno; - } -} - -static __always_inline void poke_pgno(void *const __restrict ptr, - const pgno_t pgno) { - if (sizeof(pgno) == sizeof(uint32_t)) - unaligned_poke_u32(1, ptr, pgno); - else if (sizeof(pgno) == sizeof(uint64_t)) - unaligned_poke_u64(1, ptr, pgno); - else - memcpy(ptr, &pgno, sizeof(pgno)); -} - -static __pure_function __always_inline pgno_t -node_largedata_pgno(const MDBX_node *const __restrict node) { - assert(node_flags(node) & F_BIGDATA); - return peek_pgno(node_data(node)); -} - -/*------------------------------------------------------------------------------ - * Key length limitation factors: - * - * - Branch-page must contain at least two (MDBX_MINKEYS) nodes, - * within each a key and a child page number. But we can't split a page if - * it contains less that 4 keys. Therefore, at least 3 branch-node should - * fit in the single branch-page: - * pageroom = pagesize - page_hdr_len; - * branch.maxnode = even_floor(pageroom / 3 - sizeof(indx_t)); - * branch.maxkey = branch.maxnode - node_hdr_len; - * - * - Leaf-node of non-dupsort database must fit into one leaf-page, - * where a value could be placed on a large/overflow page: - * leaf.maxnode = even_floor(pageroom - sizeof(indx_t)); - * leaf.maxkey = leaf.maxnode - node_hdr_len - sizeof(pgno_t); - * - * - SubDatabase-node must fit into one leaf-page: - * subdb.maxname = leaf.maxnode - node_hdr_len - sizeof(MDBX_db); - * - * - Dupsort values itself are a keys in a dupsort-subdb and couldn't be - * longer than the branch.maxkey. But dupsort node must fit into one - * leaf-page, since dupsort value couldn't be placed on a large/overflow - * page. - * - * - So, the simpliest solution is to use half of branch.maxkey as - * a common maxkey value. Nevertheless, the actual values of maxkey are: - * nondupsort.maxkey = even_floor(pageroom / 3) - * - sizeof(indx_t) - node_hdr_len; - * dupsort.maxkey(value) = min(nondupsort.maxkey, - * leaf.maxnode - even_ceil(length(value))); - */ - -#define PAGEROOM(pagesize) ((pagesize)-PAGEHDRSZ) -#define EVEN_FLOOR(n) ((n) & ~1ul) -#define BRANCH_NODEMAX(pagesize) \ - (EVEN_FLOOR(PAGEROOM(pagesize) / (MDBX_MINKEYS * 2 - 1)) - sizeof(indx_t)) -#define LEAF_NODEMAX(pagesize) (PAGEROOM(pagesize) - sizeof(indx_t)) -#define MAX_GC1OVPAGE(pagesize) (PAGEROOM(pagesize) / sizeof(pgno_t) - 1) - -__cold int mdbx_env_get_maxkeysize(MDBX_env *env) { - return mdbx_env_get_maxkeysize_ex(env, MDBX_DUPSORT); -} - -__cold int mdbx_env_get_maxkeysize_ex(MDBX_env *env, unsigned flags) { - if (unlikely(!env || env->me_signature != MDBX_ME_SIGNATURE)) - return -1; - - return (int)mdbx_limits_keysize_max((intptr_t)env->me_psize, flags); -} - -__cold intptr_t mdbx_limits_keysize_max(intptr_t pagesize, unsigned flags) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_syspagesize(); - if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - STATIC_ASSERT(BRANCH_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(pgno_t) >= 8); - STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(pgno_t) >= 8); - STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) - NODESIZE >= sizeof(MDBX_db)); - if (flags & MDBX_INTEGERKEY) - return 8 /* sizeof(uint64_t) */; - - STATIC_ASSERT(BRANCH_NODEMAX(MAX_PAGESIZE) - NODESIZE - sizeof(pgno_t) < - LEAF_NODEMAX(MAX_PAGESIZE) - NODESIZE - sizeof(MDBX_db)); - STATIC_ASSERT(BRANCH_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(pgno_t) < - LEAF_NODEMAX(MIN_PAGESIZE) - NODESIZE - sizeof(MDBX_db)); - if (flags & - (MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP)) - return BRANCH_NODEMAX(pagesize) - NODESIZE - sizeof(MDBX_db); - - return BRANCH_NODEMAX(pagesize) - NODESIZE - sizeof(pgno_t); -} - -__cold int mdbx_env_get_maxvalsize_ex(MDBX_env *env, unsigned flags) { - if (unlikely(!env || env->me_signature != MDBX_ME_SIGNATURE)) - return -1; - - return (int)mdbx_limits_valsize_max((intptr_t)env->me_psize, flags); -} - -__cold intptr_t mdbx_limits_valsize_max(intptr_t pagesize, unsigned flags) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_syspagesize(); - if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - if (flags & MDBX_INTEGERDUP) - return 8 /* sizeof(uint64_t) */; - - if (flags & - (MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP)) - return BRANCH_NODEMAX(pagesize) - NODESIZE; - - const unsigned page_ln2 = log2n(pagesize); - const size_t hard = 0x7FF00000ul; - const size_t hard_pages = hard >> page_ln2; - const size_t limit = (hard_pages < MDBX_DPL_TXNFULL) - ? hard - : ((size_t)MDBX_DPL_TXNFULL << page_ln2); - return (limit < MAX_MAPSIZE) ? limit / 2 : MAX_MAPSIZE / 2; -} - -/* Calculate the size of a leaf node. - * - * The size depends on the environment's page size; if a data item - * is too large it will be put onto an overflow page and the node - * size will only include the key and not the data. Sizes are always - * rounded up to an even number of bytes, to guarantee 2-byte alignment - * of the MDBX_node headers. */ -static __pure_function __always_inline size_t leaf_size(const MDBX_env *env, - const MDBX_val *key, - const MDBX_val *data) { - size_t node_bytes = node_size(key, data); - /* NOTE: The actual limit is LEAF_NODEMAX(env->me_psize), but it reasonable to - * use env->me_branch_nodemax (which is 3 times less) as the treshold because: - * - Large threshold implies that any insertion/update could result split - * a single leaf page to THREE, which requires TWO insertion into parent - * branch page, then could leads to split parent page and so on up to - * the root. Such double-splitting is complex, ie costly (in case simple - * clear implementation) either dangerous (in case high-optimized - * implementation). - * - This does not affect capabilities, i.e. it does not limit the maximum - * key size. - * - At a lower threshold, on average, the density of keys on leaf pages - * increases and the height of the tree decreases. Thus, this lead the - * less number of pages participating in the search, and the search - * speed increases. - * - On the other hand, there is no universal gold ratio here and with a - * smaller threshold, we will create more overflows/large pages, - * i.e. the database size will be larger as will the IOPS volume. - * - * So, the lower threshold is not a silver bullet, but it allow implementation - * to be much simple and robust, without adding a flaws. */ - if (node_bytes > env->me_branch_nodemax) { - /* put on overflow page */ - node_bytes = node_size(key, nullptr) + sizeof(pgno_t); - } - - return node_bytes + sizeof(indx_t); -} - -/* Calculate the size of a branch node. - * - * The size should depend on the environment's page size but since - * we currently don't support spilling large keys onto overflow - * pages, it's simply the size of the MDBX_node header plus the - * size of the key. Sizes are always rounded up to an even number - * of bytes, to guarantee 2-byte alignment of the MDBX_node headers. - * - * [in] env The environment handle. - * [in] key The key for the node. - * - * Returns The number of bytes needed to store the node. */ -static __pure_function __always_inline size_t branch_size(const MDBX_env *env, - const MDBX_val *key) { - /* Size of a node in a branch page with a given key. - * This is just the node header plus the key, there is no data. */ - size_t node_bytes = node_size(key, nullptr); - if (unlikely(node_bytes > env->me_branch_nodemax)) { - /* put on overflow page */ - /* not implemented */ - mdbx_assert_fail(env, "INDXSIZE(key) <= env->me_nodemax", __func__, - __LINE__); - node_bytes = node_size(key, nullptr) + sizeof(pgno_t); - } - - return node_bytes + sizeof(indx_t); -} - -/*----------------------------------------------------------------------------*/ - -static __pure_function __always_inline size_t pgno2bytes(const MDBX_env *env, - pgno_t pgno) { - mdbx_assert(env, (1u << env->me_psize2log) == env->me_psize); - return ((size_t)pgno) << env->me_psize2log; -} - -static __pure_function __always_inline MDBX_page *pgno2page(const MDBX_env *env, - pgno_t pgno) { - return (MDBX_page *)(env->me_map + pgno2bytes(env, pgno)); -} - -static __pure_function __always_inline pgno_t bytes2pgno(const MDBX_env *env, - size_t bytes) { - mdbx_assert(env, (env->me_psize >> env->me_psize2log) == 1); - return (pgno_t)(bytes >> env->me_psize2log); -} - -static __pure_function size_t pgno_align2os_bytes(const MDBX_env *env, - pgno_t pgno) { - return roundup_powerof2(pgno2bytes(env, pgno), env->me_os_psize); -} - -static __pure_function pgno_t pgno_align2os_pgno(const MDBX_env *env, - pgno_t pgno) { - return bytes2pgno(env, pgno_align2os_bytes(env, pgno)); -} - -static __pure_function size_t bytes_align2os_bytes(const MDBX_env *env, - size_t bytes) { - return roundup_powerof2(roundup_powerof2(bytes, env->me_psize), - env->me_os_psize); -} - -/* Address of first usable data byte in a page, after the header */ -static __pure_function __always_inline void *page_data(const MDBX_page *mp) { - return (char *)mp + PAGEHDRSZ; -} - -static __pure_function __always_inline const MDBX_page * -data_page(const void *data) { - return container_of(data, MDBX_page, mp_ptrs); -} - -static __pure_function __always_inline MDBX_meta *page_meta(MDBX_page *mp) { - return (MDBX_meta *)page_data(mp); -} - -/* Number of nodes on a page */ -static __pure_function __always_inline unsigned -page_numkeys(const MDBX_page *mp) { - return mp->mp_lower >> 1; -} - -/* The amount of space remaining in the page */ -static __pure_function __always_inline unsigned page_room(const MDBX_page *mp) { - return mp->mp_upper - mp->mp_lower; -} - -static __pure_function __always_inline unsigned -page_space(const MDBX_env *env) { - STATIC_ASSERT(PAGEHDRSZ % 2 == 0); - return env->me_psize - PAGEHDRSZ; -} - -static __pure_function __always_inline unsigned page_used(const MDBX_env *env, - const MDBX_page *mp) { - return page_space(env) - page_room(mp); -} - -/* The percentage of space used in the page, in a percents. */ -static __pure_function __maybe_unused __inline double -page_fill(const MDBX_env *env, const MDBX_page *mp) { - return page_used(env, mp) * 100.0 / page_space(env); -} - -static __pure_function __inline bool -page_fill_enough(const MDBX_page *mp, unsigned spaceleft_threshold, - unsigned minkeys_threshold) { - return page_room(mp) < spaceleft_threshold && - page_numkeys(mp) >= minkeys_threshold; -} - -/* The number of overflow pages needed to store the given size. */ -static __pure_function __always_inline pgno_t -number_of_ovpages(const MDBX_env *env, size_t bytes) { - return bytes2pgno(env, PAGEHDRSZ - 1 + bytes) + 1; -} - -/* Address of node i in page p */ -static __pure_function __always_inline MDBX_node *page_node(const MDBX_page *mp, - unsigned i) { - assert((mp->mp_flags & (P_LEAF2 | P_OVERFLOW | P_META)) == 0); - assert(page_numkeys(mp) > (unsigned)(i)); - assert(mp->mp_ptrs[i] % 2 == 0); - return (MDBX_node *)((char *)mp + mp->mp_ptrs[i] + PAGEHDRSZ); -} - -/* The address of a key in a LEAF2 page. - * LEAF2 pages are used for MDBX_DUPFIXED sorted-duplicate sub-DBs. - * There are no node headers, keys are stored contiguously. */ -static __pure_function __always_inline void * -page_leaf2key(const MDBX_page *mp, unsigned i, size_t keysize) { - assert(mp->mp_leaf2_ksize == keysize); - (void)keysize; - return (char *)mp + PAGEHDRSZ + (i * mp->mp_leaf2_ksize); -} - -/* Set the node's key into keyptr. */ -static __always_inline void get_key(const MDBX_node *node, MDBX_val *keyptr) { - keyptr->iov_len = node_ks(node); - keyptr->iov_base = node_key(node); -} - -/* Set the node's key into keyptr, if requested. */ -static __always_inline void -get_key_optional(const MDBX_node *node, MDBX_val *keyptr /* __may_null */) { - if (keyptr) - get_key(node, keyptr); -} - -/*------------------------------------------------------------------------------ - * Workaround for mmaped-lookahead-cross-page-boundary bug - * in an obsolete versions of Elbrus's libc and kernels. */ -#if defined(__e2k__) && defined(MDBX_E2K_MLHCPB_WORKAROUND) && \ - MDBX_E2K_MLHCPB_WORKAROUND -int __hot mdbx_e2k_memcmp_bug_workaround(const void *s1, const void *s2, - size_t n) { - if (unlikely(n > 42 - /* LY: align followed access if reasonable possible */ - && (((uintptr_t)s1) & 7) != 0 && - (((uintptr_t)s1) & 7) == (((uintptr_t)s2) & 7))) { - if (((uintptr_t)s1) & 1) { - const int diff = *(uint8_t *)s1 - *(uint8_t *)s2; - if (diff) - return diff; - s1 = (char *)s1 + 1; - s2 = (char *)s2 + 1; - n -= 1; - } - - if (((uintptr_t)s1) & 2) { - const uint16_t a = *(uint16_t *)s1; - const uint16_t b = *(uint16_t *)s2; - if (likely(a != b)) - return (__builtin_bswap16(a) > __builtin_bswap16(b)) ? 1 : -1; - s1 = (char *)s1 + 2; - s2 = (char *)s2 + 2; - n -= 2; - } - - if (((uintptr_t)s1) & 4) { - const uint32_t a = *(uint32_t *)s1; - const uint32_t b = *(uint32_t *)s2; - if (likely(a != b)) - return (__builtin_bswap32(a) > __builtin_bswap32(b)) ? 1 : -1; - s1 = (char *)s1 + 4; - s2 = (char *)s2 + 4; - n -= 4; - } - } - - while (n >= 8) { - const uint64_t a = *(uint64_t *)s1; - const uint64_t b = *(uint64_t *)s2; - if (likely(a != b)) - return (__builtin_bswap64(a) > __builtin_bswap64(b)) ? 1 : -1; - s1 = (char *)s1 + 8; - s2 = (char *)s2 + 8; - n -= 8; - } - - if (n & 4) { - const uint32_t a = *(uint32_t *)s1; - const uint32_t b = *(uint32_t *)s2; - if (likely(a != b)) - return (__builtin_bswap32(a) > __builtin_bswap32(b)) ? 1 : -1; - s1 = (char *)s1 + 4; - s2 = (char *)s2 + 4; - } - - if (n & 2) { - const uint16_t a = *(uint16_t *)s1; - const uint16_t b = *(uint16_t *)s2; - if (likely(a != b)) - return (__builtin_bswap16(a) > __builtin_bswap16(b)) ? 1 : -1; - s1 = (char *)s1 + 2; - s2 = (char *)s2 + 2; - } - - return (n & 1) ? *(uint8_t *)s1 - *(uint8_t *)s2 : 0; -} - -int __hot mdbx_e2k_strcmp_bug_workaround(const char *s1, const char *s2) { - while (true) { - int diff = *(uint8_t *)s1 - *(uint8_t *)s2; - if (likely(diff != 0) || *s1 == '\0') - return diff; - s1 += 1; - s2 += 1; - } -} - -int __hot mdbx_e2k_strncmp_bug_workaround(const char *s1, const char *s2, - size_t n) { - while (n > 0) { - int diff = *(uint8_t *)s1 - *(uint8_t *)s2; - if (likely(diff != 0) || *s1 == '\0') - return diff; - s1 += 1; - s2 += 1; - n -= 1; - } - return 0; -} - -size_t __hot mdbx_e2k_strlen_bug_workaround(const char *s) { - size_t n = 0; - while (*s) { - s += 1; - n += 1; - } - return n; -} - -size_t __hot mdbx_e2k_strnlen_bug_workaround(const char *s, size_t maxlen) { - size_t n = 0; - while (maxlen > n && *s) { - s += 1; - n += 1; - } - return n; -} -#endif /* MDBX_E2K_MLHCPB_WORKAROUND */ - -/*------------------------------------------------------------------------------ - * safe read/write volatile 64-bit fields on 32-bit architectures. */ - -static __always_inline void atomic_yield(void) { -#if defined(_WIN32) || defined(_WIN64) - YieldProcessor(); -#elif defined(__x86_64__) || defined(__i386__) || defined(__e2k__) - __builtin_ia32_pause(); -#elif defined(__ia64__) -#if defined(__HP_cc__) || defined(__HP_aCC__) - _Asm_hint(_HINT_PAUSE); -#else - __asm__ __volatile__("hint @pause"); -#endif -#elif defined(__arm__) || defined(__aarch64__) -#ifdef __CC_ARM - __yield(); -#else - __asm__ __volatile__("yield"); -#endif -#elif (defined(__mips64) || defined(__mips64__)) && defined(__mips_isa_rev) && \ - __mips_isa_rev >= 2 - __asm__ __volatile__("pause"); -#elif defined(__mips) || defined(__mips__) || defined(__mips64) || \ - defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ - defined(__MWERKS__) || defined(__sgi) - __asm__ __volatile__(".word 0x00000140"); -#else - pthread_yield(); -#endif -} - -#if MDBX_64BIT_CAS -static __always_inline bool atomic_cas64(volatile uint64_t *p, uint64_t c, - uint64_t v) { -#if defined(ATOMIC_VAR_INIT) || defined(ATOMIC_LLONG_LOCK_FREE) - STATIC_ASSERT(sizeof(long long) >= sizeof(uint64_t)); -#ifndef __COVERITY__ - STATIC_ASSERT(atomic_is_lock_free(p)); -#endif /* Workaround for Coverity */ - return atomic_compare_exchange_strong((_Atomic uint64_t *)p, &c, v); -#elif defined(__GNUC__) || defined(__clang__) - return __sync_bool_compare_and_swap(p, c, v); -#elif defined(_MSC_VER) - return c == - (uint64_t)_InterlockedCompareExchange64((volatile int64_t *)p, v, c); -#elif defined(__APPLE__) - return OSAtomicCompareAndSwap64Barrier(c, v, (volatile uint64_t *)p); -#else -#error FIXME: Unsupported compiler -#endif -} -#endif /* MDBX_64BIT_CAS */ - -static __always_inline bool atomic_cas32(volatile uint32_t *p, uint32_t c, - uint32_t v) { -#if defined(ATOMIC_VAR_INIT) || defined(ATOMIC_INT_LOCK_FREE) - STATIC_ASSERT(sizeof(int) >= sizeof(uint32_t)); -#ifndef __COVERITY__ - STATIC_ASSERT(atomic_is_lock_free(p)); -#endif /* Workaround for Coverity */ - return atomic_compare_exchange_strong((_Atomic uint32_t *)p, &c, v); -#elif defined(__GNUC__) || defined(__clang__) - return __sync_bool_compare_and_swap(p, c, v); -#elif defined(_MSC_VER) - STATIC_ASSERT(sizeof(volatile long) == sizeof(volatile uint32_t)); - return c == (uint32_t)_InterlockedCompareExchange((volatile long *)p, v, c); -#elif defined(__APPLE__) - return OSAtomicCompareAndSwap32Barrier(c, v, (volatile int32_t *)p); -#else -#error FIXME: Unsupported compiler -#endif -} - -static __always_inline uint32_t atomic_add32(volatile uint32_t *p, uint32_t v) { -#if defined(ATOMIC_VAR_INIT) || defined(ATOMIC_INT_LOCK_FREE) - STATIC_ASSERT(sizeof(int) >= sizeof(uint32_t)); -#ifndef __COVERITY__ - STATIC_ASSERT(atomic_is_lock_free(p)); -#endif /* Workaround for Coverity */ - return atomic_fetch_add((_Atomic uint32_t *)p, v); -#elif defined(__GNUC__) || defined(__clang__) - return __sync_fetch_and_add(p, v); -#elif defined(_MSC_VER) - STATIC_ASSERT(sizeof(volatile long) == sizeof(volatile uint32_t)); - return _InterlockedExchangeAdd((volatile long *)p, v); -#elif defined(__APPLE__) - return OSAtomicAdd32Barrier(v, (volatile int32_t *)p); -#else -#error FIXME: Unsupported compiler -#endif -} - -#define atomic_sub32(p, v) atomic_add32(p, 0 - (v)) - -static __maybe_unused __always_inline bool safe64_is_valid(uint64_t v) { -#if MDBX_WORDBITS >= 64 - return v < SAFE64_INVALID_THRESHOLD; -#else - return (v >> 32) != UINT32_MAX; -#endif /* MDBX_WORDBITS */ -} - -static __maybe_unused __always_inline bool -safe64_is_valid_ptr(const mdbx_safe64_t *ptr) { - mdbx_compiler_barrier(); -#if MDBX_64BIT_ATOMIC - return ptr->atomic < SAFE64_INVALID_THRESHOLD; -#else - return ptr->high != UINT32_MAX; -#endif /* MDBX_64BIT_ATOMIC */ -} - -static __always_inline uint64_t safe64_txnid_next(uint64_t txnid) { - txnid += MDBX_TXNID_STEP; -#if !MDBX_64BIT_CAS - /* avoid overflow of low-part in safe64_reset() */ - txnid += (UINT32_MAX == (uint32_t)txnid); -#endif - return txnid; -} - -static __always_inline void safe64_reset(mdbx_safe64_t *ptr, - bool single_writer) { - mdbx_compiler_barrier(); -#if !MDBX_64BIT_CAS - if (!single_writer) { - STATIC_ASSERT(MDBX_TXNID_STEP > 1); - /* it is safe to increment low-part to avoid ABA, since MDBX_TXNID_STEP > 1 - * and overflow was preserved in safe64_txnid_next() */ - atomic_add32(&ptr->low, 1) /* avoid ABA in safe64_reset_compare() */; - ptr->high = UINT32_MAX /* atomically make >= SAFE64_INVALID_THRESHOLD */; - atomic_add32(&ptr->low, 1) /* avoid ABA in safe64_reset_compare() */; - } else -#else - (void)single_writer; -#endif /* !MDBX_64BIT_CAS */ -#if MDBX_64BIT_ATOMIC - ptr->atomic = UINT64_MAX; -#else - /* atomically make value >= SAFE64_INVALID_THRESHOLD */ - ptr->high = UINT32_MAX; -#endif /* MDBX_64BIT_ATOMIC */ - assert(ptr->inconsistent >= SAFE64_INVALID_THRESHOLD); - mdbx_flush_incoherent_cpu_writeback(); - mdbx_jitter4testing(true); -} - -static __always_inline bool safe64_reset_compare(mdbx_safe64_t *ptr, - txnid_t compare) { - mdbx_compiler_barrier(); - /* LY: This function is used to reset `mr_txnid` from OOM-kick in case - * the asynchronously cancellation of read transaction. Therefore, - * there may be a collision between the cleanup performed here and - * asynchronous termination and restarting of the read transaction - * in another proces/thread. In general we MUST NOT reset the `mr_txnid` - * if a new transaction was started (i.e. if `mr_txnid` was changed). */ -#if MDBX_64BIT_CAS - bool rc = atomic_cas64(&ptr->inconsistent, compare, UINT64_MAX); - mdbx_flush_incoherent_cpu_writeback(); -#else - /* LY: There is no gold ratio here since shared mutex is too costly, - * in such way we must acquire/release it for every update of mr_txnid, - * i.e. twice for each read transaction). */ - bool rc = false; - if (likely(ptr->low == (uint32_t)compare && - atomic_cas32(&ptr->high, (uint32_t)(compare >> 32), UINT32_MAX))) { - if (unlikely(ptr->low != (uint32_t)compare)) - atomic_cas32(&ptr->high, UINT32_MAX, (uint32_t)(compare >> 32)); - else - rc = true; - } -#endif /* MDBX_64BIT_CAS */ - mdbx_jitter4testing(true); - return rc; -} - -static __always_inline void safe64_write(mdbx_safe64_t *ptr, const uint64_t v) { - mdbx_compiler_barrier(); - assert(ptr->inconsistent >= SAFE64_INVALID_THRESHOLD); -#if MDBX_64BIT_ATOMIC - ptr->atomic = v; -#else /* MDBX_64BIT_ATOMIC */ - /* update low-part but still value >= SAFE64_INVALID_THRESHOLD */ - ptr->low = (uint32_t)v; - assert(ptr->inconsistent >= SAFE64_INVALID_THRESHOLD); - mdbx_flush_incoherent_cpu_writeback(); - mdbx_jitter4testing(true); - /* update high-part from SAFE64_INVALID_THRESHOLD to actual value */ - ptr->high = (uint32_t)(v >> 32); -#endif /* MDBX_64BIT_ATOMIC */ - assert(ptr->inconsistent == v); - mdbx_flush_incoherent_cpu_writeback(); - mdbx_jitter4testing(true); -} - -static __always_inline uint64_t safe64_read(const mdbx_safe64_t *ptr) { - mdbx_compiler_barrier(); - mdbx_jitter4testing(true); - uint64_t v; -#if MDBX_64BIT_ATOMIC - v = ptr->atomic; -#else /* MDBX_64BIT_ATOMIC */ - uint32_t hi, lo; - do { - hi = ptr->high; - mdbx_compiler_barrier(); - mdbx_jitter4testing(true); - lo = ptr->low; - mdbx_compiler_barrier(); - mdbx_jitter4testing(true); - } while (unlikely(hi != ptr->high)); - v = lo | (uint64_t)hi << 32; -#endif /* MDBX_64BIT_ATOMIC */ - mdbx_jitter4testing(true); - return v; -} - -static __always_inline void safe64_update(mdbx_safe64_t *ptr, - const uint64_t v) { - safe64_reset(ptr, true); - safe64_write(ptr, v); -} - -/*----------------------------------------------------------------------------*/ -/* rthc (tls keys and destructors) */ - -typedef struct rthc_entry_t { - MDBX_reader *begin; - MDBX_reader *end; - mdbx_thread_key_t thr_tls_key; - bool key_valid; -} rthc_entry_t; - -#if MDBX_DEBUG -#define RTHC_INITIAL_LIMIT 1 -#else -#define RTHC_INITIAL_LIMIT 16 -#endif - -static bin128_t bootid; - -#if defined(_WIN32) || defined(_WIN64) -static CRITICAL_SECTION rthc_critical_section; -static CRITICAL_SECTION lcklist_critical_section; -#else -int __cxa_thread_atexit_impl(void (*dtor)(void *), void *obj, void *dso_symbol) - __attribute__((__weak__)); -#ifdef __APPLE__ /* FIXME: Thread-Local Storage destructors & DSO-unloading */ -int __cxa_thread_atexit_impl(void (*dtor)(void *), void *obj, - void *dso_symbol) { - (void)dtor; - (void)obj; - (void)dso_symbol; - return -1; -} -#endif /* __APPLE__ */ - -static pthread_mutex_t lcklist_mutex = PTHREAD_MUTEX_INITIALIZER; -static pthread_mutex_t rthc_mutex = PTHREAD_MUTEX_INITIALIZER; -static pthread_cond_t rthc_cond = PTHREAD_COND_INITIALIZER; -static mdbx_thread_key_t rthc_key; -static volatile uint32_t rthc_pending; - -static void __cold workaround_glibc_bug21031(void) { - /* Workaround for https://sourceware.org/bugzilla/show_bug.cgi?id=21031 - * - * Due race between pthread_key_delete() and __nptl_deallocate_tsd() - * The destructor(s) of thread-local-storate object(s) may be running - * in another thread(s) and be blocked or not finished yet. - * In such case we get a SEGFAULT after unload this library DSO. - * - * So just by yielding a few timeslices we give a chance - * to such destructor(s) for completion and avoids segfault. */ - sched_yield(); - sched_yield(); - sched_yield(); -} -#endif - -static unsigned rthc_count, rthc_limit; -static rthc_entry_t *rthc_table; -static rthc_entry_t rthc_table_static[RTHC_INITIAL_LIMIT]; - -static __inline void rthc_lock(void) { -#if defined(_WIN32) || defined(_WIN64) - EnterCriticalSection(&rthc_critical_section); -#else - mdbx_ensure(nullptr, pthread_mutex_lock(&rthc_mutex) == 0); -#endif -} - -static __inline void rthc_unlock(void) { -#if defined(_WIN32) || defined(_WIN64) - LeaveCriticalSection(&rthc_critical_section); -#else - mdbx_ensure(nullptr, pthread_mutex_unlock(&rthc_mutex) == 0); -#endif -} - -static __inline int thread_key_create(mdbx_thread_key_t *key) { - int rc; -#if defined(_WIN32) || defined(_WIN64) - *key = TlsAlloc(); - rc = (*key != TLS_OUT_OF_INDEXES) ? MDBX_SUCCESS : GetLastError(); -#else - rc = pthread_key_create(key, nullptr); -#endif - mdbx_trace("&key = %p, value 0x%x, rc %d", __Wpedantic_format_voidptr(key), - (unsigned)*key, rc); - return rc; -} - -static __inline void thread_key_delete(mdbx_thread_key_t key) { - mdbx_trace("key = 0x%x", (unsigned)key); -#if defined(_WIN32) || defined(_WIN64) - mdbx_ensure(nullptr, TlsFree(key)); -#else - mdbx_ensure(nullptr, pthread_key_delete(key) == 0); - workaround_glibc_bug21031(); -#endif -} - -static __inline void *thread_rthc_get(mdbx_thread_key_t key) { -#if defined(_WIN32) || defined(_WIN64) - return TlsGetValue(key); -#else - return pthread_getspecific(key); -#endif -} - -static void thread_rthc_set(mdbx_thread_key_t key, const void *value) { -#if defined(_WIN32) || defined(_WIN64) - mdbx_ensure(nullptr, TlsSetValue(key, (void *)value)); -#else -#define MDBX_THREAD_RTHC_ZERO 0 -#define MDBX_THREAD_RTHC_REGISTERD 1 -#define MDBX_THREAD_RTHC_COUNTED 2 - static __thread uint32_t thread_registration_state; - if (value && unlikely(thread_registration_state == MDBX_THREAD_RTHC_ZERO)) { - thread_registration_state = MDBX_THREAD_RTHC_REGISTERD; - mdbx_trace("thread registered 0x%" PRIxPTR, (uintptr_t)mdbx_thread_self()); - if (&__cxa_thread_atexit_impl == nullptr || - __cxa_thread_atexit_impl(mdbx_rthc_thread_dtor, - &thread_registration_state, - (void *)&mdbx_version /* dso_anchor */)) { - mdbx_ensure(nullptr, pthread_setspecific( - rthc_key, &thread_registration_state) == 0); - thread_registration_state = MDBX_THREAD_RTHC_COUNTED; - const unsigned count_before = atomic_add32(&rthc_pending, 1); - mdbx_ensure(nullptr, count_before < INT_MAX); - mdbx_trace("fallback to pthreads' tsd, key 0x%x, count %u", - (unsigned)rthc_key, count_before); - (void)count_before; - } - } - mdbx_ensure(nullptr, pthread_setspecific(key, value) == 0); -#endif -} - -__cold void mdbx_rthc_global_init(void) { - rthc_limit = RTHC_INITIAL_LIMIT; - rthc_table = rthc_table_static; -#if defined(_WIN32) || defined(_WIN64) - InitializeCriticalSection(&rthc_critical_section); - InitializeCriticalSection(&lcklist_critical_section); -#else - mdbx_ensure(nullptr, - pthread_key_create(&rthc_key, mdbx_rthc_thread_dtor) == 0); - mdbx_trace("pid %d, &mdbx_rthc_key = %p, value 0x%x", mdbx_getpid(), - __Wpedantic_format_voidptr(&rthc_key), (unsigned)rthc_key); -#endif - /* checking time conversion, this also avoids racing on 32-bit architectures - * during writing calculated 64-bit ratio(s) into memory. */ - uint32_t proba = UINT32_MAX; - while (true) { - unsigned time_conversion_checkup = - mdbx_osal_monotime_to_16dot16(mdbx_osal_16dot16_to_monotime(proba)); - unsigned one_more = (proba < UINT32_MAX) ? proba + 1 : proba; - unsigned one_less = (proba > 0) ? proba - 1 : proba; - mdbx_ensure(nullptr, time_conversion_checkup >= one_less && - time_conversion_checkup <= one_more); - if (proba == 0) - break; - proba >>= 1; - } - - bootid = mdbx_osal_bootid(); -} - -/* dtor called for thread, i.e. for all mdbx's environment objects */ -__cold void mdbx_rthc_thread_dtor(void *ptr) { - rthc_lock(); - mdbx_trace(">> pid %d, thread 0x%" PRIxPTR ", rthc %p", mdbx_getpid(), - (uintptr_t)mdbx_thread_self(), ptr); - - const uint32_t self_pid = mdbx_getpid(); - for (unsigned i = 0; i < rthc_count; ++i) { - if (!rthc_table[i].key_valid) - continue; - const mdbx_thread_key_t key = rthc_table[i].thr_tls_key; - MDBX_reader *const rthc = thread_rthc_get(key); - if (rthc < rthc_table[i].begin || rthc >= rthc_table[i].end) - continue; -#if !defined(_WIN32) && !defined(_WIN64) - if (pthread_setspecific(key, nullptr) != 0) { - mdbx_trace("== thread 0x%" PRIxPTR - ", rthc %p: ignore race with tsd-key deletion", - (uintptr_t)mdbx_thread_self(), ptr); - continue /* ignore race with tsd-key deletion by mdbx_env_close() */; - } -#endif - - mdbx_trace("== thread 0x%" PRIxPTR - ", rthc %p, [%i], %p ... %p (%+i), rtch-pid %i, " - "current-pid %i", - (uintptr_t)mdbx_thread_self(), __Wpedantic_format_voidptr(rthc), - i, __Wpedantic_format_voidptr(rthc_table[i].begin), - __Wpedantic_format_voidptr(rthc_table[i].end), - (int)(rthc - rthc_table[i].begin), rthc->mr_pid, self_pid); - if (rthc->mr_pid == self_pid) { - mdbx_trace("==== thread 0x%" PRIxPTR ", rthc %p, cleanup", - (uintptr_t)mdbx_thread_self(), - __Wpedantic_format_voidptr(rthc)); - rthc->mr_pid = 0; - } - } - -#if defined(_WIN32) || defined(_WIN64) - mdbx_trace("<< thread 0x%" PRIxPTR ", rthc %p", (uintptr_t)mdbx_thread_self(), - ptr); - rthc_unlock(); -#else - const char self_registration = *(char *)ptr; - *(char *)ptr = MDBX_THREAD_RTHC_ZERO; - mdbx_trace("== thread 0x%" PRIxPTR ", rthc %p, pid %d, self-status %d", - (uintptr_t)mdbx_thread_self(), ptr, mdbx_getpid(), - self_registration); - if (self_registration == MDBX_THREAD_RTHC_COUNTED) - mdbx_ensure(nullptr, atomic_sub32(&rthc_pending, 1) > 0); - - if (rthc_pending == 0) { - mdbx_trace("== thread 0x%" PRIxPTR ", rthc %p, pid %d, wake", - (uintptr_t)mdbx_thread_self(), ptr, mdbx_getpid()); - mdbx_ensure(nullptr, pthread_cond_broadcast(&rthc_cond) == 0); - } - - mdbx_trace("<< thread 0x%" PRIxPTR ", rthc %p", (uintptr_t)mdbx_thread_self(), - ptr); - /* Allow tail call optimization, i.e. gcc should generate the jmp instruction - * instead of a call for pthread_mutex_unlock() and therefore CPU could not - * return to current DSO's code section, which may be unloaded immediately - * after the mutex got released. */ - pthread_mutex_unlock(&rthc_mutex); -#endif -} - -__cold void mdbx_rthc_global_dtor(void) { - mdbx_trace(">> pid %d", mdbx_getpid()); - - rthc_lock(); -#if !defined(_WIN32) && !defined(_WIN64) - char *rthc = (char *)pthread_getspecific(rthc_key); - mdbx_trace("== thread 0x%" PRIxPTR ", rthc %p, pid %d, self-status %d", - (uintptr_t)mdbx_thread_self(), __Wpedantic_format_voidptr(rthc), - mdbx_getpid(), rthc ? *rthc : -1); - if (rthc) { - const char self_registration = *(char *)rthc; - *rthc = MDBX_THREAD_RTHC_ZERO; - if (self_registration == MDBX_THREAD_RTHC_COUNTED) - mdbx_ensure(nullptr, atomic_sub32(&rthc_pending, 1) > 0); - } - - struct timespec abstime; - mdbx_ensure(nullptr, clock_gettime(CLOCK_REALTIME, &abstime) == 0); - abstime.tv_nsec += 1000000000l / 10; - if (abstime.tv_nsec >= 1000000000l) { - abstime.tv_nsec -= 1000000000l; - abstime.tv_sec += 1; - } -#if MDBX_DEBUG > 0 - abstime.tv_sec += 600; -#endif - - for (unsigned left; (left = rthc_pending) > 0;) { - mdbx_trace("pid %d, pending %u, wait for...", mdbx_getpid(), left); - const int rc = pthread_cond_timedwait(&rthc_cond, &rthc_mutex, &abstime); - if (rc && rc != EINTR) - break; - } - thread_key_delete(rthc_key); -#endif - - const uint32_t self_pid = mdbx_getpid(); - for (unsigned i = 0; i < rthc_count; ++i) { - if (!rthc_table[i].key_valid) - continue; - const mdbx_thread_key_t key = rthc_table[i].thr_tls_key; - thread_key_delete(key); - for (MDBX_reader *rthc = rthc_table[i].begin; rthc < rthc_table[i].end; - ++rthc) { - mdbx_trace("== [%i] = key %zu, %p ... %p, rthc %p (%+i), " - "rthc-pid %i, current-pid %i", - i, (size_t)key, - __Wpedantic_format_voidptr(rthc_table[i].begin), - __Wpedantic_format_voidptr(rthc_table[i].end), - __Wpedantic_format_voidptr(rthc), - (int)(rthc - rthc_table[i].begin), rthc->mr_pid, self_pid); - if (rthc->mr_pid == self_pid) { - rthc->mr_pid = 0; - mdbx_trace("== cleanup %p", __Wpedantic_format_voidptr(rthc)); - } - } - } - - rthc_limit = rthc_count = 0; - if (rthc_table != rthc_table_static) - mdbx_free(rthc_table); - rthc_table = nullptr; - rthc_unlock(); - -#if defined(_WIN32) || defined(_WIN64) - DeleteCriticalSection(&lcklist_critical_section); - DeleteCriticalSection(&rthc_critical_section); -#else - /* LY: yielding a few timeslices to give a more chance - * to racing destructor(s) for completion. */ - workaround_glibc_bug21031(); -#endif - - mdbx_trace("<< pid %d\n", mdbx_getpid()); -} - -__cold int mdbx_rthc_alloc(mdbx_thread_key_t *key, MDBX_reader *begin, - MDBX_reader *end) { - int rc; - if (key) { -#ifndef NDEBUG - *key = (mdbx_thread_key_t)0xBADBADBAD; -#endif /* NDEBUG */ - rc = thread_key_create(key); - if (rc != MDBX_SUCCESS) - return rc; - } - - rthc_lock(); - const mdbx_thread_key_t new_key = key ? *key : 0; - mdbx_trace(">> key %zu, rthc_count %u, rthc_limit %u", (size_t)new_key, - rthc_count, rthc_limit); - if (rthc_count == rthc_limit) { - rthc_entry_t *new_table = - mdbx_realloc((rthc_table == rthc_table_static) ? nullptr : rthc_table, - sizeof(rthc_entry_t) * rthc_limit * 2); - if (new_table == nullptr) { - rc = MDBX_ENOMEM; - goto bailout; - } - if (rthc_table == rthc_table_static) - memcpy(new_table, rthc_table_static, sizeof(rthc_table_static)); - rthc_table = new_table; - rthc_limit *= 2; - } - mdbx_trace("== [%i] = key %zu, %p ... %p", rthc_count, (size_t)new_key, - __Wpedantic_format_voidptr(begin), - __Wpedantic_format_voidptr(end)); - rthc_table[rthc_count].key_valid = key ? true : false; - rthc_table[rthc_count].thr_tls_key = key ? new_key : 0; - rthc_table[rthc_count].begin = begin; - rthc_table[rthc_count].end = end; - ++rthc_count; - mdbx_trace("<< key %zu, rthc_count %u, rthc_limit %u", (size_t)new_key, - rthc_count, rthc_limit); - rthc_unlock(); - return MDBX_SUCCESS; - -bailout: - if (key) - thread_key_delete(*key); - rthc_unlock(); - return rc; -} - -__cold void mdbx_rthc_remove(const mdbx_thread_key_t key) { - thread_key_delete(key); - rthc_lock(); - mdbx_trace(">> key %zu, rthc_count %u, rthc_limit %u", (size_t)key, - rthc_count, rthc_limit); - - for (unsigned i = 0; i < rthc_count; ++i) { - if (rthc_table[i].key_valid && key == rthc_table[i].thr_tls_key) { - const uint32_t self_pid = mdbx_getpid(); - mdbx_trace("== [%i], %p ...%p, current-pid %d", i, - __Wpedantic_format_voidptr(rthc_table[i].begin), - __Wpedantic_format_voidptr(rthc_table[i].end), self_pid); - - for (MDBX_reader *rthc = rthc_table[i].begin; rthc < rthc_table[i].end; - ++rthc) { - if (rthc->mr_pid == self_pid) { - rthc->mr_pid = 0; - mdbx_trace("== cleanup %p", __Wpedantic_format_voidptr(rthc)); - } - } - if (--rthc_count > 0) - rthc_table[i] = rthc_table[rthc_count]; - else if (rthc_table != rthc_table_static) { - mdbx_free(rthc_table); - rthc_table = rthc_table_static; - rthc_limit = RTHC_INITIAL_LIMIT; - } - break; - } - } - - mdbx_trace("<< key %zu, rthc_count %u, rthc_limit %u", (size_t)key, - rthc_count, rthc_limit); - rthc_unlock(); -} - -//------------------------------------------------------------------------------ - -#define RTHC_ENVLIST_END ((MDBX_env *)((size_t)50459)) -static MDBX_env *inprocess_lcklist_head = RTHC_ENVLIST_END; - -static __inline void lcklist_lock(void) { -#if defined(_WIN32) || defined(_WIN64) - EnterCriticalSection(&lcklist_critical_section); -#else - mdbx_ensure(nullptr, pthread_mutex_lock(&lcklist_mutex) == 0); -#endif -} - -static __inline void lcklist_unlock(void) { -#if defined(_WIN32) || defined(_WIN64) - LeaveCriticalSection(&lcklist_critical_section); -#else - mdbx_ensure(nullptr, pthread_mutex_unlock(&lcklist_mutex) == 0); -#endif -} - -static uint64_t rrxmrrxmsx_0(uint64_t v) { - /* Pelle Evensen's mixer, https://bit.ly/2HOfynt */ - v ^= (v << 39 | v >> 25) ^ (v << 14 | v >> 50); - v *= UINT64_C(0xA24BAED4963EE407); - v ^= (v << 40 | v >> 24) ^ (v << 15 | v >> 49); - v *= UINT64_C(0x9FB21C651E98DF25); - return v ^ v >> 28; -} - -static int uniq_peek(const mdbx_mmap_t *pending, mdbx_mmap_t *scan) { - int rc; - uint64_t bait; - if (pending->address) { - bait = pending->lck->mti_bait_uniqueness; - rc = MDBX_SUCCESS; - } else { - bait = 0 /* hush MSVC warning */; - rc = mdbx_msync(scan, 0, sizeof(MDBX_lockinfo), true); - if (rc == MDBX_SUCCESS) - rc = - mdbx_pread(pending->fd, &bait, sizeof(scan->lck->mti_bait_uniqueness), - offsetof(MDBX_lockinfo, mti_bait_uniqueness)); - } - if (likely(rc == MDBX_SUCCESS) && bait == scan->lck->mti_bait_uniqueness) - rc = MDBX_RESULT_TRUE; - - mdbx_trace("uniq-peek: %s, bait 0x%016" PRIx64 ",%s rc %d", - pending->lck ? "mem" : "file", bait, - (rc == MDBX_RESULT_TRUE) ? " found," : (rc ? " FAILED," : ""), rc); - return rc; -} - -static int uniq_poke(const mdbx_mmap_t *pending, mdbx_mmap_t *scan, - uint64_t *abra) { - if (*abra == 0) { - const size_t tid = mdbx_thread_self(); - size_t uit = 0; - memcpy(&uit, &tid, (sizeof(tid) < sizeof(uit)) ? sizeof(tid) : sizeof(uit)); - *abra = - rrxmrrxmsx_0(mdbx_osal_monotime() + UINT64_C(5873865991930747) * uit); - } - const uint64_t cadabra = - rrxmrrxmsx_0(*abra + UINT64_C(7680760450171793) * (unsigned)mdbx_getpid()) - << 24 | - *abra >> 40; - scan->lck->mti_bait_uniqueness = cadabra; - mdbx_flush_incoherent_cpu_writeback(); - *abra = *abra * UINT64_C(6364136223846793005) + 1; - return uniq_peek(pending, scan); -} - -__cold static int uniq_check(const mdbx_mmap_t *pending, MDBX_env **found) { - *found = nullptr; - uint64_t salt = 0; - for (MDBX_env *scan = inprocess_lcklist_head; scan != RTHC_ENVLIST_END; - scan = scan->me_lcklist_next) { - int err = scan->me_lck_mmap.lck->mti_bait_uniqueness - ? uniq_peek(pending, &scan->me_lck_mmap) - : uniq_poke(pending, &scan->me_lck_mmap, &salt); - if (err == MDBX_ENODATA) { - uint64_t length; - if (likely(mdbx_filesize(pending->fd, &length) == MDBX_SUCCESS && - length == 0)) { - /* LY: skip checking since LCK-file is empty, i.e. just created. */ - mdbx_debug("uniq-probe: %s", "unique (new/empty lck)"); - return MDBX_RESULT_TRUE; - } - } - if (err == MDBX_RESULT_TRUE) - err = uniq_poke(pending, &scan->me_lck_mmap, &salt); - if (err == MDBX_RESULT_TRUE) { - (void)mdbx_msync(&scan->me_lck_mmap, 0, sizeof(MDBX_lockinfo), false); - err = uniq_poke(pending, &scan->me_lck_mmap, &salt); - } - if (err == MDBX_RESULT_TRUE) { - err = uniq_poke(pending, &scan->me_lck_mmap, &salt); - *found = scan; - mdbx_debug("uniq-probe: found %p", __Wpedantic_format_voidptr(*found)); - return MDBX_RESULT_FALSE; - } - if (unlikely(err != MDBX_SUCCESS)) { - mdbx_debug("uniq-probe: failed rc %d", err); - return err; - } - } - - mdbx_debug("uniq-probe: %s", "unique"); - return MDBX_RESULT_TRUE; -} - -static int lcklist_detach_locked(MDBX_env *env) { - MDBX_env *inprocess_neighbor = nullptr; - int rc = MDBX_SUCCESS; - if (env->me_lcklist_next != nullptr) { - mdbx_ensure(env, env->me_lcklist_next != nullptr); - mdbx_ensure(env, inprocess_lcklist_head != RTHC_ENVLIST_END); - for (MDBX_env **ptr = &inprocess_lcklist_head; *ptr != RTHC_ENVLIST_END; - ptr = &(*ptr)->me_lcklist_next) { - if (*ptr == env) { - *ptr = env->me_lcklist_next; - env->me_lcklist_next = nullptr; - break; - } - } - mdbx_ensure(env, env->me_lcklist_next == nullptr); - } - - rc = likely(mdbx_getpid() == env->me_pid) - ? uniq_check(&env->me_lck_mmap, &inprocess_neighbor) - : MDBX_PANIC; - if (!inprocess_neighbor && env->me_live_reader) - (void)mdbx_rpid_clear(env); - if (!MDBX_IS_ERROR(rc)) - rc = mdbx_lck_destroy(env, inprocess_neighbor); - return rc; -} - -/*------------------------------------------------------------------------------ - * LY: State of the art quicksort-based sorting, with internal stack - * and network-sort for small chunks. - * Thanks to John M. Gamble for the http://pages.ripco.net/~jgamble/nw.html */ - -#define SORT_CMP_SWAP(TYPE, CMP, a, b) \ - do { \ - const TYPE swap_tmp = (a); \ - const bool swap_cmp = CMP(swap_tmp, b); \ - (a) = swap_cmp ? swap_tmp : b; \ - (b) = swap_cmp ? b : swap_tmp; \ - } while (0) - -// 3 comparators, 3 parallel operations -// o-----^--^--o -// | | -// o--^--|--v--o -// | | -// o--v--v-----o -// -// [[1,2]] -// [[0,2]] -// [[0,1]] -#define SORT_NETWORK_3(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - } while (0) - -// 5 comparators, 3 parallel operations -// o--^--^--------o -// | | -// o--v--|--^--^--o -// | | | -// o--^--v--|--v--o -// | | -// o--v-----v-----o -// -// [[0,1],[2,3]] -// [[0,2],[1,3]] -// [[1,2]] -#define SORT_NETWORK_4(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - } while (0) - -// 9 comparators, 5 parallel operations -// o--^--^-----^-----------o -// | | | -// o--|--|--^--v-----^--^--o -// | | | | | -// o--|--v--|--^--^--|--v--o -// | | | | | -// o--|-----v--|--v--|--^--o -// | | | | -// o--v--------v-----v--v--o -// -// [[0,4],[1,3]] -// [[0,2]] -// [[2,4],[0,1]] -// [[2,3],[1,4]] -// [[1,2],[3,4]] -#define SORT_NETWORK_5(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - } while (0) - -// 12 comparators, 6 parallel operations -// o-----^--^--^-----------------o -// | | | -// o--^--|--v--|--^--------^-----o -// | | | | | -// o--v--v-----|--|--^--^--|--^--o -// | | | | | | -// o-----^--^--v--|--|--|--v--v--o -// | | | | | -// o--^--|--v-----v--|--v--------o -// | | | -// o--v--v-----------v-----------o -// -// [[1,2],[4,5]] -// [[0,2],[3,5]] -// [[0,1],[3,4],[2,5]] -// [[0,3],[1,4]] -// [[2,4],[1,3]] -// [[2,3]] -#define SORT_NETWORK_6(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - } while (0) - -// 16 comparators, 6 parallel operations -// o--^--------^-----^-----------------o -// | | | -// o--|--^-----|--^--v--------^--^-----o -// | | | | | | -// o--|--|--^--v--|--^-----^--|--v-----o -// | | | | | | | -// o--|--|--|-----v--|--^--v--|--^--^--o -// | | | | | | | | -// o--v--|--|--^-----v--|--^--v--|--v--o -// | | | | | | -// o-----v--|--|--------v--v-----|--^--o -// | | | | -// o--------v--v-----------------v--v--o -// -// [[0,4],[1,5],[2,6]] -// [[0,2],[1,3],[4,6]] -// [[2,4],[3,5],[0,1]] -// [[2,3],[4,5]] -// [[1,4],[3,6]] -// [[1,2],[3,4],[5,6]] -#define SORT_NETWORK_7(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - } while (0) - -// 19 comparators, 6 parallel operations -// o--^--------^-----^-----------------o -// | | | -// o--|--^-----|--^--v--------^--^-----o -// | | | | | | -// o--|--|--^--v--|--^-----^--|--v-----o -// | | | | | | | -// o--|--|--|--^--v--|--^--v--|--^--^--o -// | | | | | | | | | -// o--v--|--|--|--^--v--|--^--v--|--v--o -// | | | | | | | -// o-----v--|--|--|--^--v--v-----|--^--o -// | | | | | | -// o--------v--|--v--|--^--------v--v--o -// | | | -// o-----------v-----v--v--------------o -// -// [[0,4],[1,5],[2,6],[3,7]] -// [[0,2],[1,3],[4,6],[5,7]] -// [[2,4],[3,5],[0,1],[6,7]] -// [[2,3],[4,5]] -// [[1,4],[3,6]] -// [[1,2],[3,4],[5,6]] -#define SORT_NETWORK_8(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - } while (0) - -// 25 comparators, 9 parallel operations -// o--^-----^--^-----^-----------------------------------o -// | | | | -// o--v--^--v--|-----|--^-----^-----------^--------------o -// | | | | | | -// o-----v-----|-----|--|-----|--^-----^--|--^-----^--^--o -// | | | | | | | | | | -// o--^-----^--v--^--v--|-----|--|-----|--v--|-----|--v--o -// | | | | | | | | | -// o--v--^--v-----|-----v--^--v--|-----|-----|--^--v-----o -// | | | | | | | -// o-----v--------|--------|-----v--^--v--^--|--|--^-----o -// | | | | | | | -// o--^-----^-----v--------|--------|-----|--v--v--v-----o -// | | | | | -// o--v--^--v--------------v--------|-----v--------------o -// | | -// o-----v--------------------------v--------------------o -// -// [[0,1],[3,4],[6,7]] -// [[1,2],[4,5],[7,8]] -// [[0,1],[3,4],[6,7],[2,5]] -// [[0,3],[1,4],[5,8]] -// [[3,6],[4,7],[2,5]] -// [[0,3],[1,4],[5,7],[2,6]] -// [[1,3],[4,6]] -// [[2,4],[5,6]] -// [[2,3]] -#define SORT_NETWORK_9(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - } while (0) - -// 29 comparators, 9 parallel operations -// o--------------^-----^--^--^-----------------------o -// | | | | -// o-----------^--|--^--|--|--v--^--------^-----------o -// | | | | | | | -// o--------^--|--|--|--|--v--^--v-----^--|--^--------o -// | | | | | | | | | -// o-----^--|--|--|--|--v--^--|-----^--|--v--v--^-----o -// | | | | | | | | | | -// o--^--|--|--|--|--v-----|--v--^--|--|--^-----v--^--o -// | | | | | | | | | | | -// o--|--|--|--|--v--^-----|--^--|--v--v--|-----^--v--o -// | | | | | | | | | | -// o--|--|--|--v--^--|-----v--|--v--^-----|--^--v-----o -// | | | | | | | | | -// o--|--|--v-----|--|--^-----v--^--|-----v--v--------o -// | | | | | | | -// o--|--v--------|--v--|--^-----v--v-----------------o -// | | | | -// o--v-----------v-----v--v--------------------------o -// -// [[4,9],[3,8],[2,7],[1,6],[0,5]] -// [[1,4],[6,9],[0,3],[5,8]] -// [[0,2],[3,6],[7,9]] -// [[0,1],[2,4],[5,7],[8,9]] -// [[1,2],[4,6],[7,8],[3,5]] -// [[2,5],[6,8],[1,3],[4,7]] -// [[2,3],[6,7]] -// [[3,4],[5,6]] -// [[4,5]] -#define SORT_NETWORK_10(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - } while (0) - -// 35 comparators, 9 parallel operations -// o--^-----^-----------------^--------^--------------------o -// | | | | -// o--v--^--|--^--^--------^--|--------|--^-----------------o -// | | | | | | | | -// o--^--|--v--v--|-----^--|--|--------|--|-----^--^--------o -// | | | | | | | | | | -// o--v--v--------|-----|--|--|--^-----|--|--^--v--|--^--^--o -// | | | | | | | | | | | -// o--^-----^-----|-----|--|--v--|--^--v--v--|-----v--|--v--o -// | | | | | | | | | -// o--v--^--|--^--v--^--|--v-----|--|--------|--------v--^--o -// | | | | | | | | | -// o--^--|--v--v--^--|--v--^-----|--|--------|--------^--v--o -// | | | | | | | | | -// o--v--v--------|--|-----|-----v--|--^-----|-----^--|--^--o -// | | | | | | | | | -// o--^--^--------|--|-----|--------v--|-----v--^--|--v--v--o -// | | | | | | | | -// o--v--|--^-----|--v-----|-----------|--------v--v--------o -// | | | | | -// o-----v--v-----v--------v-----------v--------------------o -// -// [[0,1],[2,3],[4,5],[6,7],[8,9]] -// [[1,3],[5,7],[0,2],[4,6],[8,10]] -// [[1,2],[5,6],[9,10],[0,4],[3,7]] -// [[1,5],[6,10],[4,8]] -// [[5,9],[2,6],[0,4],[3,8]] -// [[1,5],[6,10],[2,3],[8,9]] -// [[1,4],[7,10],[3,5],[6,8]] -// [[2,4],[7,9],[5,6]] -// [[3,4],[7,8]] -#define SORT_NETWORK_11(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - } while (0) - -// 39 comparators, parallel operations -// o--^-----^-----------------^--------^--------------------o -// | | | | -// o--v--^--|--^--^--------^--|--------|--^-----------------o -// | | | | | | | | -// o--^--|--v--v--|-----^--|--|--------|--|-----^--^--------o -// | | | | | | | | | | -// o--v--v--------|-----|--|--|--^-----|--|--^--v--|--^--^--o -// | | | | | | | | | | | -// o--^-----^-----|-----|--|--v--|--^--v--v--|-----v--|--v--o -// | | | | | | | | | -// o--v--^--|--^--v--^--|--v-----|--|--------|--------v--^--o -// | | | | | | | | | -// o--^--|--v--v--^--|--v--^-----|--|--------|--------^--v--o -// | | | | | | | | | -// o--v--v--------|--|-----|--^--v--|--^--^--|-----^--|--^--o -// | | | | | | | | | | | -// o--^-----^-----|--|-----|--|-----v--|--|--v--^--|--v--v--o -// | | | | | | | | | | -// o--v--^--|--^--|--v-----|--|--------|--|-----v--v--------o -// | | | | | | | | -// o--^--|--v--v--v--------v--|--------|--v-----------------o -// | | | | -// o--v--v--------------------v--------v--------------------o -// -// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11]] -// [[1,3],[5,7],[9,11],[0,2],[4,6],[8,10]] -// [[1,2],[5,6],[9,10],[0,4],[7,11]] -// [[1,5],[6,10],[3,7],[4,8]] -// [[5,9],[2,6],[0,4],[7,11],[3,8]] -// [[1,5],[6,10],[2,3],[8,9]] -// [[1,4],[7,10],[3,5],[6,8]] -// [[2,4],[7,9],[5,6]] -// [[3,4],[7,8]] -#define SORT_NETWORK_12(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - } while (0) - -// 45 comparators, 10 parallel operations -// o--------^--^-----^-----------------------------^-----------------o -// | | | | -// o--^-----|--v-----|-----^--------------^-----^--|-----^-----------o -// | | | | | | | | -// o--|-----|--^--^--v-----|--------------|--^--|--|--^--v--^--------o -// | | | | | | | | | | | -// o--|--^--|--|--v-----^--|--------^-----|--|--v--|--|--^--v-----^--o -// | | | | | | | | | | | | | -// o--|--v--|--|--^-----|--v-----^--v-----|--|--^--|--|--|--^--^--v--o -// | | | | | | | | | | | | | | -// o--|--^--|--|--|--^--|--------|-----^--|--|--|--v--v--v--|--v--^--o -// | | | | | | | | | | | | | | -// o--|--|--|--v--v--|--|--^-----|--^--v--|--v--|--^--------v--^--v--o -// | | | | | | | | | | | | -// o--v--|--|-----^--|--v--|--^--|--|-----v-----v--|--^--------v-----o -// | | | | | | | | | | -// o-----v--|--^--|--|-----|--v--|--|--^-----^-----v--v--^-----------o -// | | | | | | | | | | -// o--^-----|--|--|--v-----|-----v--|--v--^--|--^--------v-----------o -// | | | | | | | | | -// o--|-----|--|--|--^-----|--------v--^--|--v--v--------------------o -// | | | | | | | | -// o--v-----|--v--|--v-----|--^--------v--v--------------------------o -// | | | | -// o--------v-----v--------v--v--------------------------------------o -// -// [[1,7],[9,11],[3,4],[5,8],[0,12],[2,6]] -// [[0,1],[2,3],[4,6],[8,11],[7,12],[5,9]] -// [[0,2],[3,7],[10,11],[1,4],[6,12]] -// [[7,8],[11,12],[4,9],[6,10]] -// [[3,4],[5,6],[8,9],[10,11],[1,7]] -// [[2,6],[9,11],[1,3],[4,7],[8,10],[0,5]] -// [[2,5],[6,8],[9,10]] -// [[1,2],[3,5],[7,8],[4,6]] -// [[2,3],[4,5],[6,7],[8,9]] -// [[3,4],[5,6]] -#define SORT_NETWORK_13(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - } while (0) - -/* *INDENT-OFF* */ -/* clang-format off */ - -// 51 comparators, 10 parallel operations -// o--^--^-----^-----------^-----------------------------------------------------------o -// | | | | -// o--v--|--^--|--^--------|--^-----^-----------------------^--------------------------o -// | | | | | | | | -// o--^--v--|--|--|--^-----|--|--^--v-----------------------|--^--^--------------------o -// | | | | | | | | | | | -// o--v-----v--|--|--|--^--|--|--|--^--------------^--------|--|--|--^--^--^-----------o -// | | | | | | | | | | | | | | | -// o--^--^-----v--|--|--|--|--|--|--|--^-----------|-----^--v--|--v--|--|--v-----------o -// | | | | | | | | | | | | | | | -// o--v--|--^-----v--|--|--|--|--|--|--|--^--^-----|-----|-----|--^--|--v-----^--------o -// | | | | | | | | | | | | | | | | | -// o--^--v--|--------v--|--|--|--|--|--|--|--|--^--|-----|-----|--v--|-----^--v-----^--o -// | | | | | | | | | | | | | | | | | -// o--v-----v-----------v--|--|--|--|--|--|--|--|--|--^--|--^--|-----|--^--|--^--^--v--o -// | | | | | | | | | | | | | | | | | | -// o--^--^-----^-----------v--|--|--|--|--|--|--|--|--|--v--|--v-----v--|--v--|--v--^--o -// | | | | | | | | | | | | | | | | -// o--v--|--^--|--^-----------v--|--|--|--|--|--v--|--|-----|--^--------|-----v--^--v--o -// | | | | | | | | | | | | | | | -// o--^--v--|--|--|--------------v--|--|--|--v-----|--|-----|--v--------|--^-----v-----o -// | | | | | | | | | | | | -// o--v-----v--|--|-----------------v--|--|--------|--v-----|--^--------|--|--^--------o -// | | | | | | | | | | -// o--^--------v--|--------------------v--|--------v--------|--|--------v--v--v--------o -// | | | | | -// o--v-----------v-----------------------v-----------------v--v-----------------------o -// -// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11],[12,13]] -// [[0,2],[4,6],[8,10],[1,3],[5,7],[9,11]] -// [[0,4],[8,12],[1,5],[9,13],[2,6],[3,7]] -// [[0,8],[1,9],[2,10],[3,11],[4,12],[5,13]] -// [[5,10],[6,9],[3,12],[7,11],[1,2],[4,8]] -// [[1,4],[7,13],[2,8],[5,6],[9,10]] -// [[2,4],[11,13],[3,8],[7,12]] -// [[6,8],[10,12],[3,5],[7,9]] -// [[3,4],[5,6],[7,8],[9,10],[11,12]] -// [[6,7],[8,9]] - -/* *INDENT-ON* */ -/* clang-format on */ - -#define SORT_NETWORK_14(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - } while (0) - -/* *INDENT-OFF* */ -/* clang-format off */ - -// 56 comparators, 10 parallel operations -// o--^--^-----^-----------^--------------------------------------------------------------o -// | | | | -// o--v--|--^--|--^--------|--^-----^--------------------------^--------------------------o -// | | | | | | | | -// o--^--v--|--|--|--^-----|--|--^--v--------------------------|--^--^--------------------o -// | | | | | | | | | | | -// o--v-----v--|--|--|--^--|--|--|--^-----------------^--------|--|--|--^--^--^-----------o -// | | | | | | | | | | | | | | | -// o--^--^-----v--|--|--|--|--|--|--|--^--------------|-----^--v--|--v--|--|--v-----------o -// | | | | | | | | | | | | | | | -// o--v--|--^-----v--|--|--|--|--|--|--|--^-----^-----|-----|-----|--^--|--v-----^--------o -// | | | | | | | | | | | | | | | | | -// o--^--v--|--------v--|--|--|--|--|--|--|--^--|--^--|-----|-----|--v--|-----^--v-----^--o -// | | | | | | | | | | | | | | | | | | -// o--v-----v-----------v--|--|--|--|--|--|--|--|--|--|--^--|--^--|-----|--^--|--^--^--v--o -// | | | | | | | | | | | | | | | | | | | -// o--^--^-----^-----------v--|--|--|--|--|--|--|--|--|--|--v--|--v-----v--|--v--|--v--^--o -// | | | | | | | | | | | | | | | | | -// o--v--|--^--|--^-----------v--|--|--|--|--|--|--v--|--|-----|--^--------|-----v--^--v--o -// | | | | | | | | | | | | | | | | -// o--^--v--|--|--|--^-----------v--|--|--|--|--v-----|--|-----|--v--------|--^-----v-----o -// | | | | | | | | | | | | | | -// o--v-----v--|--|--|--------------v--|--|--|--------|--v-----|--^--^-----|--|--^--------o -// | | | | | | | | | | | | | -// o--^--^-----v--|--|-----------------v--|--|--------v--------|--|--|-----v--v--v--------o -// | | | | | | | | | -// o--v--|--------v--|--------------------v--|--^--------------v--|--v--------------------o -// | | | | | -// o-----v-----------v-----------------------v--v-----------------v-----------------------o -// -// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11],[12,13]] -// [[0,2],[4,6],[8,10],[12,14],[1,3],[5,7],[9,11]] -// [[0,4],[8,12],[1,5],[9,13],[2,6],[10,14],[3,7]] -// [[0,8],[1,9],[2,10],[3,11],[4,12],[5,13],[6,14]] -// [[5,10],[6,9],[3,12],[13,14],[7,11],[1,2],[4,8]] -// [[1,4],[7,13],[2,8],[11,14],[5,6],[9,10]] -// [[2,4],[11,13],[3,8],[7,12]] -// [[6,8],[10,12],[3,5],[7,9]] -// [[3,4],[5,6],[7,8],[9,10],[11,12]] -// [[6,7],[8,9]] - -/* *INDENT-ON* */ -/* clang-format on */ - -#define SORT_NETWORK_15(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[13], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - } while (0) - -/* *INDENT-OFF* */ -/* clang-format off */ - -// 60 comparators, 10 parallel operations -// o--^--^-----^-----------^-----------------------------------------------------------------o -// | | | | -// o--v--|--^--|--^--------|--^-----^-----------------------------^--------------------------o -// | | | | | | | | -// o--^--v--|--|--|--^-----|--|--^--v-----------------------------|--^--^--------------------o -// | | | | | | | | | | | -// o--v-----v--|--|--|--^--|--|--|--^--------------------^--------|--|--|--^--^--^-----------o -// | | | | | | | | | | | | | | | -// o--^--^-----v--|--|--|--|--|--|--|--^-----------------|-----^--v--|--v--|--|--v-----------o -// | | | | | | | | | | | | | | | -// o--v--|--^-----v--|--|--|--|--|--|--|--^--------^-----|-----|-----|--^--|--v-----^--------o -// | | | | | | | | | | | | | | | | | -// o--^--v--|--------v--|--|--|--|--|--|--|--^-----|--^--|-----|-----|--v--|-----^--v-----^--o -// | | | | | | | | | | | | | | | | | | -// o--v-----v-----------v--|--|--|--|--|--|--|--^--|--|--|--^--|--^--|-----|--^--|--^--^--v--o -// | | | | | | | | | | | | | | | | | | | | -// o--^--^-----^-----------v--|--|--|--|--|--|--|--|--|--|--|--v--|--v-----v--|--v--|--v--^--o -// | | | | | | | | | | | | | | | | | | -// o--v--|--^--|--^-----------v--|--|--|--|--|--|--|--v--|--|-----|--^--------|-----v--^--v--o -// | | | | | | | | | | | | | | | | | -// o--^--v--|--|--|--^-----------v--|--|--|--|--|--v-----|--|-----|--v--------|--^-----v-----o -// | | | | | | | | | | | | | | | -// o--v-----v--|--|--|--^-----------v--|--|--|--|--------|--v-----|--^--^-----|--|--^--------o -// | | | | | | | | | | | | | | | -// o--^--^-----v--|--|--|--------------v--|--|--|--------v--------|--|--|-----v--v--v--------o -// | | | | | | | | | | | -// o--v--|--^-----v--|--|-----------------v--|--|--^--------------v--|--v--------------------o -// | | | | | | | | -// o--^--v--|--------v--|--------------------v--|--v-----------------v-----------------------o -// | | | | -// o--v-----v-----------v-----------------------v--------------------------------------------o -// -// [[0,1],[2,3],[4,5],[6,7],[8,9],[10,11],[12,13],[14,15]] -// [[0,2],[4,6],[8,10],[12,14],[1,3],[5,7],[9,11],[13,15]] -// [[0,4],[8,12],[1,5],[9,13],[2,6],[10,14],[3,7],[11,15]] -// [[0,8],[1,9],[2,10],[3,11],[4,12],[5,13],[6,14],[7,15]] -// [[5,10],[6,9],[3,12],[13,14],[7,11],[1,2],[4,8]] -// [[1,4],[7,13],[2,8],[11,14],[5,6],[9,10]] -// [[2,4],[11,13],[3,8],[7,12]] -// [[6,8],[10,12],[3,5],[7,9]] -// [[3,4],[5,6],[7,8],[9,10],[11,12]] -// [[6,7],[8,9]] - -/* *INDENT-ON* */ -/* clang-format on */ - -#define SORT_NETWORK_16(TYPE, CMP, begin) \ - do { \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[14], begin[15]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[12], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[3]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[13], begin[15]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[15]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[15]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[13], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[11]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[2]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[4], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[1], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[14]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[2], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[13]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[10], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[5]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[9]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[3], begin[4]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[5], begin[6]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[7], begin[8]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[9], begin[10]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[11], begin[12]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[6], begin[7]); \ - SORT_CMP_SWAP(TYPE, CMP, begin[8], begin[9]); \ - } while (0) - -#define SORT_INNER(TYPE, CMP, begin, end, len) \ - switch (len) { \ - default: \ - __unreachable(); \ - case 0: \ - case 1: \ - break; \ - case 2: \ - SORT_CMP_SWAP(TYPE, CMP, begin[0], begin[1]); \ - break; \ - case 3: \ - SORT_NETWORK_3(TYPE, CMP, begin); \ - break; \ - case 4: \ - SORT_NETWORK_4(TYPE, CMP, begin); \ - break; \ - case 5: \ - SORT_NETWORK_5(TYPE, CMP, begin); \ - break; \ - case 6: \ - SORT_NETWORK_6(TYPE, CMP, begin); \ - break; \ - case 7: \ - SORT_NETWORK_7(TYPE, CMP, begin); \ - break; \ - case 8: \ - SORT_NETWORK_8(TYPE, CMP, begin); \ - break; \ - case 9: \ - SORT_NETWORK_9(TYPE, CMP, begin); \ - break; \ - case 10: \ - SORT_NETWORK_10(TYPE, CMP, begin); \ - break; \ - case 11: \ - SORT_NETWORK_11(TYPE, CMP, begin); \ - break; \ - case 12: \ - SORT_NETWORK_12(TYPE, CMP, begin); \ - break; \ - case 13: \ - SORT_NETWORK_13(TYPE, CMP, begin); \ - break; \ - case 14: \ - SORT_NETWORK_14(TYPE, CMP, begin); \ - break; \ - case 15: \ - SORT_NETWORK_15(TYPE, CMP, begin); \ - break; \ - case 16: \ - SORT_NETWORK_16(TYPE, CMP, begin); \ - break; \ - } - -#define SORT_SWAP(TYPE, a, b) \ - do { \ - const TYPE swap_tmp = (a); \ - (a) = (b); \ - (b) = swap_tmp; \ - } while (0) - -#define SORT_PUSH(low, high) \ - do { \ - top->lo = (low); \ - top->hi = (high); \ - ++top; \ - } while (0) - -#define SORT_POP(low, high) \ - do { \ - --top; \ - low = top->lo; \ - high = top->hi; \ - } while (0) - -#define SORT_IMPL(NAME, EXPECT_LOW_CARDINALITY_OR_PRESORTED, TYPE, CMP) \ - \ - static __inline bool NAME##_is_sorted(const TYPE *first, const TYPE *last) { \ - while (++first <= last) \ - if (CMP(first[0], first[-1])) \ - return false; \ - return true; \ - } \ - \ - typedef struct { \ - TYPE *lo, *hi; \ - } NAME##_stack; \ - \ - static __hot void NAME(TYPE *const begin, TYPE *const end) { \ - NAME##_stack stack[sizeof(unsigned) * CHAR_BIT], *top = stack; \ - \ - TYPE *hi = end - 1; \ - TYPE *lo = begin; \ - while (true) { \ - const ptrdiff_t len = hi - lo; \ - if (len < 16) { \ - SORT_INNER(TYPE, CMP, lo, hi + 1, len + 1); \ - if (unlikely(top == stack)) \ - break; \ - SORT_POP(lo, hi); \ - continue; \ - } \ - \ - TYPE *mid = lo + (len >> 1); \ - SORT_CMP_SWAP(TYPE, CMP, *lo, *mid); \ - SORT_CMP_SWAP(TYPE, CMP, *mid, *hi); \ - SORT_CMP_SWAP(TYPE, CMP, *lo, *mid); \ - \ - TYPE *right = hi - 1; \ - TYPE *left = lo + 1; \ - while (1) { \ - while (CMP(*left, *mid)) \ - ++left; \ - while (CMP(*mid, *right)) \ - --right; \ - if (unlikely(left > right)) { \ - if (EXPECT_LOW_CARDINALITY_OR_PRESORTED) { \ - if (NAME##_is_sorted(lo, right)) \ - lo = right + 1; \ - if (NAME##_is_sorted(left, hi)) \ - hi = left; \ - } \ - break; \ - } \ - SORT_SWAP(TYPE, *left, *right); \ - mid = (mid == left) ? right : (mid == right) ? left : mid; \ - ++left; \ - --right; \ - } \ - \ - if (right - lo > hi - left) { \ - SORT_PUSH(lo, right); \ - lo = left; \ - } else { \ - SORT_PUSH(left, hi); \ - hi = right; \ - } \ - } \ - \ - if (mdbx_audit_enabled()) { \ - for (TYPE *scan = begin + 1; scan < end; ++scan) \ - assert(CMP(scan[-1], scan[0])); \ - } \ - } - -/*------------------------------------------------------------------------------ - * LY: Binary search */ - -#define SEARCH_IMPL(NAME, TYPE_LIST, TYPE_ARG, CMP) \ - static __always_inline TYPE_LIST *NAME(TYPE_LIST *first, unsigned length, \ - const TYPE_ARG item) { \ - TYPE_LIST *const begin = first, *const end = begin + length; \ - \ - while (length > 3) { \ - const unsigned whole = length; \ - length >>= 1; \ - TYPE_LIST *const middle = first + length; \ - if (CMP(*middle, item)) { \ - first = middle + 1; \ - length = whole - length - 1; \ - } \ - } \ - \ - switch (length) { \ - case 3: \ - if (!CMP(*first, item)) \ - break; \ - ++first; \ - __fallthrough /* fall through */; \ - case 2: \ - if (!CMP(*first, item)) \ - break; \ - ++first; \ - __fallthrough /* fall through */; \ - case 1: \ - if (!CMP(*first, item)) \ - break; \ - ++first; \ - __fallthrough /* fall through */; \ - case 0: \ - break; \ - default: \ - __unreachable(); \ - } \ - \ - if (mdbx_audit_enabled()) { \ - for (TYPE_LIST *scan = begin; scan < first; ++scan) \ - assert(CMP(*scan, item)); \ - for (TYPE_LIST *scan = first; scan < end; ++scan) \ - assert(!CMP(*scan, item)); \ - (void)begin, (void)end; \ - } \ - \ - return first; \ - } - -/*----------------------------------------------------------------------------*/ - -static __always_inline size_t pnl2bytes(const size_t size) { - assert(size > 0 && size <= MDBX_PNL_MAX * 2); - size_t bytes = roundup_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + - sizeof(pgno_t) * (size + 2), - MDBX_PNL_GRANULATE * sizeof(pgno_t)) - - MDBX_ASSUME_MALLOC_OVERHEAD; - return bytes; -} - -static __always_inline pgno_t bytes2pnl(const size_t bytes) { - size_t size = bytes / sizeof(pgno_t); - assert(size > 2 && size <= MDBX_PNL_MAX * 2); - return (pgno_t)size - 2; -} - -static MDBX_PNL mdbx_pnl_alloc(size_t size) { - size_t bytes = pnl2bytes(size); - MDBX_PNL pl = mdbx_malloc(bytes); - if (likely(pl)) { -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) - bytes = malloc_usable_size(pl); -#endif /* malloc_usable_size */ - pl[0] = bytes2pnl(bytes); - assert(pl[0] >= size); - pl[1] = 0; - pl += 1; - } - return pl; -} - -static void mdbx_pnl_free(MDBX_PNL pl) { - if (likely(pl)) - mdbx_free(pl - 1); -} - -/* Shrink the PNL to the default size if it has grown larger */ -static void mdbx_pnl_shrink(MDBX_PNL *ppl) { - assert(bytes2pnl(pnl2bytes(MDBX_PNL_INITIAL)) == MDBX_PNL_INITIAL); - assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PNL_MAX && - MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); - MDBX_PNL_SIZE(*ppl) = 0; - if (unlikely(MDBX_PNL_ALLOCLEN(*ppl) > - MDBX_PNL_INITIAL * 2 - MDBX_CACHELINE_SIZE / sizeof(pgno_t))) { - size_t bytes = pnl2bytes(MDBX_PNL_INITIAL); - MDBX_PNL pl = mdbx_realloc(*ppl - 1, bytes); - if (likely(pl)) { -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) - bytes = malloc_usable_size(pl); -#endif /* malloc_usable_size */ - *pl = bytes2pnl(bytes); - *ppl = pl + 1; - } - } -} - -/* Grow the PNL to the size growed to at least given size */ -static int mdbx_pnl_reserve(MDBX_PNL *ppl, const size_t wanna) { - const size_t allocated = MDBX_PNL_ALLOCLEN(*ppl); - assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PNL_MAX && - MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); - if (likely(allocated >= wanna)) - return MDBX_SUCCESS; - - if (unlikely(wanna > /* paranoia */ MDBX_PNL_MAX)) - return MDBX_TXN_FULL; - - const size_t size = (wanna + wanna - allocated < MDBX_PNL_MAX) - ? wanna + wanna - allocated - : MDBX_PNL_MAX; - size_t bytes = pnl2bytes(size); - MDBX_PNL pl = mdbx_realloc(*ppl - 1, bytes); - if (likely(pl)) { -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) - bytes = malloc_usable_size(pl); -#endif /* malloc_usable_size */ - *pl = bytes2pnl(bytes); - assert(*pl >= wanna); - *ppl = pl + 1; - return MDBX_SUCCESS; - } - return MDBX_ENOMEM; -} - -/* Make room for num additional elements in an PNL */ -static __always_inline int __must_check_result mdbx_pnl_need(MDBX_PNL *ppl, - size_t num) { - assert(MDBX_PNL_SIZE(*ppl) <= MDBX_PNL_MAX && - MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); - assert(num <= MDBX_PNL_MAX); - const size_t wanna = MDBX_PNL_SIZE(*ppl) + num; - return likely(MDBX_PNL_ALLOCLEN(*ppl) >= wanna) - ? MDBX_SUCCESS - : mdbx_pnl_reserve(ppl, wanna); -} - -static __always_inline void mdbx_pnl_xappend(MDBX_PNL pl, pgno_t pgno) { - assert(MDBX_PNL_SIZE(pl) < MDBX_PNL_ALLOCLEN(pl)); - if (mdbx_audit_enabled()) { - for (unsigned i = MDBX_PNL_SIZE(pl); i > 0; --i) - assert(pgno != pl[i]); - } - MDBX_PNL_SIZE(pl) += 1; - MDBX_PNL_LAST(pl) = pgno; -} - -/* Append an pgno onto an unsorted PNL */ -static __hot int __must_check_result mdbx_pnl_append(MDBX_PNL *ppl, - pgno_t pgno) { - /* Too big? */ - if (unlikely(MDBX_PNL_SIZE(*ppl) == MDBX_PNL_ALLOCLEN(*ppl))) { - int rc = mdbx_pnl_need(ppl, MDBX_PNL_GRANULATE); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - mdbx_pnl_xappend(*ppl, pgno); - return MDBX_SUCCESS; -} - -/* Append an PNL onto an unsorted PNL */ -static int __must_check_result mdbx_pnl_append_list(MDBX_PNL *ppl, - MDBX_PNL append) { - const unsigned len = MDBX_PNL_SIZE(append); - if (likely(len)) { - int rc = mdbx_pnl_need(ppl, MDBX_PNL_SIZE(append)); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - const MDBX_PNL pnl = *ppl; - unsigned w = MDBX_PNL_SIZE(pnl), r = 1; - do - pnl[++w] = append[r]; - while (++r <= len); - MDBX_PNL_SIZE(pnl) = w; - } - return MDBX_SUCCESS; -} - -/* Append an pgno range onto an unsorted PNL */ -static __hot int __must_check_result mdbx_pnl_append_range(MDBX_PNL *ppl, - pgno_t pgno, - unsigned n) { - assert(n > 0); - int rc = mdbx_pnl_need(ppl, n); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - const MDBX_PNL pnl = *ppl; -#if MDBX_PNL_ASCENDING - unsigned w = MDBX_PNL_SIZE(pnl); - do - pnl[++w] = pgno++; - while (--n); - MDBX_PNL_SIZE(pnl) = w; -#else - unsigned w = MDBX_PNL_SIZE(pnl) + n; - MDBX_PNL_SIZE(pnl) = w; - do - pnl[w--] = --n + pgno; - while (n); -#endif - - return MDBX_SUCCESS; -} - -/* Append an pgno range into the sorted PNL */ -static __hot int __must_check_result mdbx_pnl_insert_range(MDBX_PNL *ppl, - pgno_t pgno, - unsigned n) { - assert(n > 0); - int rc = mdbx_pnl_need(ppl, n); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - const MDBX_PNL pnl = *ppl; - unsigned r = MDBX_PNL_SIZE(pnl), w = r + n; - MDBX_PNL_SIZE(pnl) = w; - while (r && MDBX_PNL_DISORDERED(pnl[r], pgno)) - pnl[w--] = pnl[r--]; - - for (pgno_t fill = MDBX_PNL_ASCENDING ? pgno + n : pgno; w > r; --w) - pnl[w] = MDBX_PNL_ASCENDING ? --fill : fill++; - - return MDBX_SUCCESS; -} - -static bool mdbx_pnl_check(const MDBX_PNL pl, const pgno_t limit) { - assert(limit >= MIN_PAGENO && limit <= MAX_PAGENO + 1); - if (likely(MDBX_PNL_SIZE(pl))) { - assert(MDBX_PNL_LEAST(pl) >= MIN_PAGENO); - assert(MDBX_PNL_MOST(pl) < limit); - assert(MDBX_PNL_SIZE(pl) <= MDBX_PNL_MAX); - if (unlikely(MDBX_PNL_SIZE(pl) > MDBX_PNL_MAX * 3 / 2)) - return false; - if (unlikely(MDBX_PNL_LEAST(pl) < MIN_PAGENO)) - return false; - if (unlikely(MDBX_PNL_MOST(pl) >= limit)) - return false; - if (mdbx_audit_enabled()) { - for (const pgno_t *scan = &MDBX_PNL_LAST(pl); --scan > pl;) { - assert(MDBX_PNL_ORDERED(scan[0], scan[1])); - if (unlikely(!MDBX_PNL_ORDERED(scan[0], scan[1]))) - return false; - } - } - } - return true; -} - -static __always_inline bool mdbx_pnl_check4assert(const MDBX_PNL pl, - const pgno_t limit) { - if (unlikely(pl == nullptr)) - return true; - assert(MDBX_PNL_ALLOCLEN(pl) >= MDBX_PNL_SIZE(pl)); - if (unlikely(MDBX_PNL_ALLOCLEN(pl) < MDBX_PNL_SIZE(pl))) - return false; - return mdbx_pnl_check(pl, limit); -} - -/* Merge an PNL onto an PNL. The destination PNL must be big enough */ -static void __hot mdbx_pnl_xmerge(MDBX_PNL dst, const MDBX_PNL src) { - assert(mdbx_pnl_check4assert(dst, MAX_PAGENO + 1)); - assert(mdbx_pnl_check(src, MAX_PAGENO + 1)); - const size_t total = MDBX_PNL_SIZE(dst) + MDBX_PNL_SIZE(src); - assert(MDBX_PNL_ALLOCLEN(dst) >= total); - pgno_t *w = dst + total; - pgno_t *d = dst + MDBX_PNL_SIZE(dst); - const pgno_t *s = src + MDBX_PNL_SIZE(src); - dst[0] = /* detent for scan below */ (MDBX_PNL_ASCENDING ? 0 : ~(pgno_t)0); - while (s > src) { - while (MDBX_PNL_ORDERED(*s, *d)) - *w-- = *d--; - *w-- = *s--; - } - MDBX_PNL_SIZE(dst) = (pgno_t)total; - assert(mdbx_pnl_check4assert(dst, MAX_PAGENO + 1)); -} - -SORT_IMPL(pgno_sort, false, pgno_t, MDBX_PNL_ORDERED) -static __hot void mdbx_pnl_sort(MDBX_PNL pnl) { - pgno_sort(MDBX_PNL_BEGIN(pnl), MDBX_PNL_END(pnl)); - assert(mdbx_pnl_check(pnl, MAX_PAGENO + 1)); -} - -/* Search for an pgno in an PNL. - * Returns The index of the first item greater than or equal to pgno. */ -SEARCH_IMPL(pgno_bsearch, pgno_t, pgno_t, MDBX_PNL_ORDERED) - -static __hot unsigned mdbx_pnl_search(MDBX_PNL pnl, pgno_t id) { - assert(mdbx_pnl_check4assert(pnl, MAX_PAGENO + 1)); - pgno_t *begin = MDBX_PNL_BEGIN(pnl); - pgno_t *it = pgno_bsearch(begin, MDBX_PNL_SIZE(pnl), id); - pgno_t *end = begin + MDBX_PNL_SIZE(pnl); - assert(it >= begin && it <= end); - if (it != begin) - assert(MDBX_PNL_ORDERED(it[-1], id)); - if (it != end) - assert(!MDBX_PNL_ORDERED(it[0], id)); - return (unsigned)(it - begin + 1); -} - -static __hot unsigned mdbx_pnl_exist(MDBX_PNL pnl, pgno_t id) { - unsigned n = mdbx_pnl_search(pnl, id); - return (n <= MDBX_PNL_SIZE(pnl) && pnl[n] == id) ? n : 0; -} - -/*----------------------------------------------------------------------------*/ - -static __always_inline size_t txl2bytes(const size_t size) { - assert(size > 0 && size <= MDBX_TXL_MAX * 2); - size_t bytes = roundup_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + - sizeof(txnid_t) * (size + 2), - MDBX_TXL_GRANULATE * sizeof(txnid_t)) - - MDBX_ASSUME_MALLOC_OVERHEAD; - return bytes; -} - -static __always_inline size_t bytes2txl(const size_t bytes) { - size_t size = bytes / sizeof(txnid_t); - assert(size > 2 && size <= MDBX_TXL_MAX * 2); - return size - 2; -} - -static MDBX_TXL mdbx_txl_alloc(void) { - size_t bytes = txl2bytes(MDBX_TXL_INITIAL); - MDBX_TXL tl = mdbx_malloc(bytes); - if (likely(tl)) { -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) - bytes = malloc_usable_size(tl); -#endif /* malloc_usable_size */ - tl[0] = bytes2txl(bytes); - assert(tl[0] >= MDBX_TXL_INITIAL); - tl[1] = 0; - tl += 1; - } - return tl; -} - -static void mdbx_txl_free(MDBX_TXL tl) { - if (likely(tl)) - mdbx_free(tl - 1); -} - -static int mdbx_txl_reserve(MDBX_TXL *ptl, const size_t wanna) { - const size_t allocated = (size_t)MDBX_PNL_ALLOCLEN(*ptl); - assert(MDBX_PNL_SIZE(*ptl) <= MDBX_TXL_MAX && - MDBX_PNL_ALLOCLEN(*ptl) >= MDBX_PNL_SIZE(*ptl)); - if (likely(allocated >= wanna)) - return MDBX_SUCCESS; - - if (unlikely(wanna > /* paranoia */ MDBX_TXL_MAX)) - return MDBX_TXN_FULL; - - const size_t size = (wanna + wanna - allocated < MDBX_TXL_MAX) - ? wanna + wanna - allocated - : MDBX_TXL_MAX; - size_t bytes = txl2bytes(size); - MDBX_TXL tl = mdbx_realloc(*ptl - 1, bytes); - if (likely(tl)) { -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) - bytes = malloc_usable_size(tl); -#endif /* malloc_usable_size */ - *tl = bytes2txl(bytes); - assert(*tl >= wanna); - *ptl = tl + 1; - return MDBX_SUCCESS; - } - return MDBX_ENOMEM; -} - -static __always_inline int __must_check_result mdbx_txl_need(MDBX_TXL *ptl, - size_t num) { - assert(MDBX_PNL_SIZE(*ptl) <= MDBX_TXL_MAX && - MDBX_PNL_ALLOCLEN(*ptl) >= MDBX_PNL_SIZE(*ptl)); - assert(num <= MDBX_PNL_MAX); - const size_t wanna = (size_t)MDBX_PNL_SIZE(*ptl) + num; - return likely(MDBX_PNL_ALLOCLEN(*ptl) >= wanna) - ? MDBX_SUCCESS - : mdbx_txl_reserve(ptl, wanna); -} - -static __always_inline void mdbx_txl_xappend(MDBX_TXL tl, txnid_t id) { - assert(MDBX_PNL_SIZE(tl) < MDBX_PNL_ALLOCLEN(tl)); - MDBX_PNL_SIZE(tl) += 1; - MDBX_PNL_LAST(tl) = id; -} - -#define TXNID_SORT_CMP(first, last) ((first) > (last)) -SORT_IMPL(txnid_sort, false, txnid_t, TXNID_SORT_CMP) -static void mdbx_txl_sort(MDBX_TXL tl) { - txnid_sort(MDBX_PNL_BEGIN(tl), MDBX_PNL_END(tl)); -} - -static int __must_check_result mdbx_txl_append(MDBX_TXL *ptl, txnid_t id) { - if (unlikely(MDBX_PNL_SIZE(*ptl) == MDBX_PNL_ALLOCLEN(*ptl))) { - int rc = mdbx_txl_need(ptl, MDBX_TXL_GRANULATE); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - mdbx_txl_xappend(*ptl, id); - return MDBX_SUCCESS; -} - -/*----------------------------------------------------------------------------*/ - -#define DP_SORT_CMP(first, last) ((first).pgno < (last).pgno) -SORT_IMPL(dp_sort, false, MDBX_DP, DP_SORT_CMP) -static __always_inline MDBX_DPL mdbx_dpl_sort(MDBX_DPL dl) { - assert(dl->length <= MDBX_DPL_TXNFULL); - assert(dl->sorted <= dl->length); - if (dl->sorted != dl->length) { - dl->sorted = dl->length; - dp_sort(dl + 1, dl + dl->length + 1); - } - return dl; -} - -/* Returns the index of the first dirty-page whose pgno - * member is greater than or equal to id. */ -#define DP_SEARCH_CMP(dp, id) ((dp).pgno < (id)) -SEARCH_IMPL(dp_bsearch, MDBX_DP, pgno_t, DP_SEARCH_CMP) - -static unsigned __hot mdbx_dpl_search(MDBX_DPL dl, pgno_t pgno) { - if (mdbx_audit_enabled()) { - for (const MDBX_DP *ptr = dl + dl->sorted; --ptr > dl;) { - assert(ptr[0].pgno < ptr[1].pgno); - assert(ptr[0].pgno >= NUM_METAS); - } - } - - switch (dl->length - dl->sorted) { - default: - /* sort a whole */ - dl->sorted = dl->length; - dp_sort(dl + 1, dl + dl->length + 1); - __fallthrough; /* fall through */ - case 0: - /* whole sorted cases */ - if (mdbx_audit_enabled()) { - for (const MDBX_DP *ptr = dl + dl->length; --ptr > dl;) { - assert(ptr[0].pgno < ptr[1].pgno); - assert(ptr[0].pgno >= NUM_METAS); - } - } - return (unsigned)(dp_bsearch(dl + 1, dl->length, pgno) - dl); - -#define LINEAR_SEARCH_CASE(N) \ - case N: \ - if (dl[dl->length - N + 1].pgno == pgno) \ - return dl->length - N + 1; \ - __fallthrough - - /* try linear search until the threshold */ - LINEAR_SEARCH_CASE(16); /* fall through */ - LINEAR_SEARCH_CASE(15); /* fall through */ - LINEAR_SEARCH_CASE(14); /* fall through */ - LINEAR_SEARCH_CASE(13); /* fall through */ - LINEAR_SEARCH_CASE(12); /* fall through */ - LINEAR_SEARCH_CASE(11); /* fall through */ - LINEAR_SEARCH_CASE(10); /* fall through */ - LINEAR_SEARCH_CASE(9); /* fall through */ - LINEAR_SEARCH_CASE(8); /* fall through */ - LINEAR_SEARCH_CASE(7); /* fall through */ - LINEAR_SEARCH_CASE(6); /* fall through */ - LINEAR_SEARCH_CASE(5); /* fall through */ - LINEAR_SEARCH_CASE(4); /* fall through */ - LINEAR_SEARCH_CASE(3); /* fall through */ - LINEAR_SEARCH_CASE(2); /* fall through */ - case 1: - if (dl[dl->length].pgno == pgno) - return dl->length; - /* continue bsearch on the sorted part */ - return (unsigned)(dp_bsearch(dl + 1, dl->sorted, pgno) - dl); - } -} - -static __always_inline MDBX_page *mdbx_dpl_find(MDBX_DPL dl, pgno_t pgno) { - const unsigned i = mdbx_dpl_search(dl, pgno); - assert((int)i > 0); - return (i <= dl->length && dl[i].pgno == pgno) ? dl[i].ptr : nullptr; -} - -static __hot MDBX_page *mdbx_dpl_remove(MDBX_DPL dl, pgno_t prno) { - unsigned i = mdbx_dpl_search(dl, prno); - assert((int)i > 0); - MDBX_page *mp = nullptr; - if (i <= dl->length && dl[i].pgno == prno) { - dl->sorted -= dl->sorted >= i; - mp = dl[i].ptr; - while (i < dl->length) { - dl[i] = dl[i + 1]; - ++i; - } - dl->length -= 1; - } - return mp; -} - -static __always_inline int __must_check_result -mdbx_dpl_append(MDBX_DPL dl, pgno_t pgno, MDBX_page *page) { - assert(dl->length <= MDBX_DPL_TXNFULL); - if (mdbx_audit_enabled()) { - for (unsigned i = dl->length; i > 0; --i) { - assert(dl[i].pgno != pgno); - if (unlikely(dl[i].pgno == pgno)) - return MDBX_PROBLEM; - } - } - - if (unlikely(dl->length == MDBX_DPL_TXNFULL)) - return MDBX_TXN_FULL; - - /* append page */ - const unsigned n = dl->length + 1; - if (n == 1 || (dl->sorted >= dl->length && dl[n - 1].pgno < pgno)) - dl->sorted = n; - dl->length = n; - dl[n].pgno = pgno; - dl[n].ptr = page; - return MDBX_SUCCESS; -} - -static __always_inline void mdbx_dpl_clear(MDBX_DPL dl) { - dl->sorted = dl->length = 0; -} - -/*----------------------------------------------------------------------------*/ - -#ifndef MDBX_ALLOY -uint8_t mdbx_runtime_flags = MDBX_RUNTIME_FLAGS_INIT; -uint8_t mdbx_loglevel = MDBX_DEBUG; -MDBX_debug_func *mdbx_debug_logger; -#endif /* MDBX_ALLOY */ - -static bool mdbx_refund(MDBX_txn *txn); -static __must_check_result int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp); -static __must_check_result int mdbx_page_loose(MDBX_txn *txn, MDBX_page *mp); -static int mdbx_page_alloc(MDBX_cursor *mc, const unsigned num, - MDBX_page **const mp, int flags); -static txnid_t mdbx_oomkick(MDBX_env *env, const txnid_t laggard); - -static int mdbx_page_new(MDBX_cursor *mc, uint32_t flags, unsigned num, - MDBX_page **mp); -static int mdbx_page_touch(MDBX_cursor *mc); -static int mdbx_cursor_touch(MDBX_cursor *mc); - -#define MDBX_END_NAMES \ - { \ - "committed", "empty-commit", "abort", "reset", "reset-tmp", "fail-begin", \ - "fail-beginchild" \ - } -enum { - /* mdbx_txn_end operation number, for logging */ - MDBX_END_COMMITTED, - MDBX_END_EMPTY_COMMIT, - MDBX_END_ABORT, - MDBX_END_RESET, - MDBX_END_RESET_TMP, - MDBX_END_FAIL_BEGIN, - MDBX_END_FAIL_BEGINCHILD -}; -#define MDBX_END_OPMASK 0x0F /* mask for mdbx_txn_end() operation number */ -#define MDBX_END_UPDATE 0x10 /* update env state (DBIs) */ -#define MDBX_END_FREE 0x20 /* free txn unless it is MDBX_env.me_txn0 */ -#define MDBX_END_EOTDONE 0x40 /* txn's cursors already closed */ -#define MDBX_END_SLOT 0x80 /* release any reader slot if MDBX_NOTLS */ -static int mdbx_txn_end(MDBX_txn *txn, unsigned mode); - -static int __must_check_result mdbx_page_get(MDBX_cursor *mc, pgno_t pgno, - MDBX_page **mp, int *lvl); -static int __must_check_result mdbx_page_search_root(MDBX_cursor *mc, - MDBX_val *key, int modify); - -#define MDBX_PS_MODIFY 1 -#define MDBX_PS_ROOTONLY 2 -#define MDBX_PS_FIRST 4 -#define MDBX_PS_LAST 8 -static int __must_check_result mdbx_page_search(MDBX_cursor *mc, MDBX_val *key, - int flags); -static int __must_check_result mdbx_page_merge(MDBX_cursor *csrc, - MDBX_cursor *cdst); -static int __must_check_result mdbx_page_flush(MDBX_txn *txn, - const unsigned keep); - -#define MDBX_SPLIT_REPLACE MDBX_APPENDDUP /* newkey is not new */ -static int __must_check_result mdbx_page_split(MDBX_cursor *mc, - const MDBX_val *newkey, - MDBX_val *newdata, - pgno_t newpgno, unsigned nflags); - -static int __must_check_result mdbx_read_header(MDBX_env *env, MDBX_meta *meta, - uint64_t *filesize, - const int lck_exclusive); -static int __must_check_result mdbx_sync_locked(MDBX_env *env, unsigned flags, - MDBX_meta *const pending); -static int mdbx_env_close0(MDBX_env *env); - -static MDBX_node *mdbx_node_search(MDBX_cursor *mc, MDBX_val *key, int *exactp); - -static int __must_check_result mdbx_node_add_branch(MDBX_cursor *mc, - unsigned indx, - const MDBX_val *key, - pgno_t pgno); -static int __must_check_result mdbx_node_add_leaf(MDBX_cursor *mc, - unsigned indx, - const MDBX_val *key, - MDBX_val *data, - unsigned flags); -static int __must_check_result mdbx_node_add_leaf2(MDBX_cursor *mc, - unsigned indx, - const MDBX_val *key); - -static void mdbx_node_del(MDBX_cursor *mc, size_t ksize); -static void mdbx_node_shrink(MDBX_page *mp, unsigned indx); -static int __must_check_result mdbx_node_move(MDBX_cursor *csrc, - MDBX_cursor *cdst, int fromleft); -static int __must_check_result mdbx_node_read(MDBX_cursor *mc, MDBX_node *leaf, - MDBX_val *data); -static int __must_check_result mdbx_rebalance(MDBX_cursor *mc); -static int __must_check_result mdbx_update_key(MDBX_cursor *mc, - const MDBX_val *key); - -static void mdbx_cursor_pop(MDBX_cursor *mc); -static int __must_check_result mdbx_cursor_push(MDBX_cursor *mc, MDBX_page *mp); - -static int __must_check_result mdbx_audit_ex(MDBX_txn *txn, - unsigned retired_stored, - bool dont_filter_gc); -static __maybe_unused __always_inline int __must_check_result -mdbx_audit(MDBX_txn *txn) { - return mdbx_audit_ex(txn, 0, (txn->mt_flags & MDBX_RDONLY) != 0); -} - -static int __must_check_result mdbx_page_check(MDBX_env *env, - const MDBX_page *const mp, - bool maybe_unfinished); -static int __must_check_result mdbx_cursor_check(MDBX_cursor *mc, bool pending); -static int __must_check_result mdbx_cursor_del0(MDBX_cursor *mc); -static int __must_check_result mdbx_del0(MDBX_txn *txn, MDBX_dbi dbi, - MDBX_val *key, MDBX_val *data, - unsigned flags); -static int __must_check_result mdbx_cursor_sibling(MDBX_cursor *mc, - int move_right); -static int __must_check_result mdbx_cursor_next(MDBX_cursor *mc, MDBX_val *key, - MDBX_val *data, - MDBX_cursor_op op); -static int __must_check_result mdbx_cursor_prev(MDBX_cursor *mc, MDBX_val *key, - MDBX_val *data, - MDBX_cursor_op op); -static int __must_check_result mdbx_cursor_set(MDBX_cursor *mc, MDBX_val *key, - MDBX_val *data, - MDBX_cursor_op op, int *exactp); -static int __must_check_result mdbx_cursor_first(MDBX_cursor *mc, MDBX_val *key, - MDBX_val *data); -static int __must_check_result mdbx_cursor_last(MDBX_cursor *mc, MDBX_val *key, - MDBX_val *data); - -static int __must_check_result mdbx_cursor_init(MDBX_cursor *mc, MDBX_txn *txn, - MDBX_dbi dbi); -static int __must_check_result mdbx_xcursor_init0(MDBX_cursor *mc); -static int __must_check_result mdbx_xcursor_init1(MDBX_cursor *mc, - MDBX_node *node); -static int __must_check_result mdbx_xcursor_init2(MDBX_cursor *mc, - MDBX_xcursor *src_mx, - int force); -static void mdbx_cursor_copy(const MDBX_cursor *csrc, MDBX_cursor *cdst); - -static int __must_check_result mdbx_drop0(MDBX_cursor *mc, int subs); -static int __must_check_result mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi); - -static MDBX_cmp_func mdbx_cmp_memn, mdbx_cmp_memnr, mdbx_cmp_int_align4, - mdbx_cmp_int_align2, mdbx_cmp_int_unaligned; - -static const char *__mdbx_strerr(int errnum) { - /* Table of descriptions for MDBX errors */ - static const char *const tbl[] = { - "MDBX_KEYEXIST: Key/data pair already exists", - "MDBX_NOTFOUND: No matching key/data pair found", - "MDBX_PAGE_NOTFOUND: Requested page not found", - "MDBX_CORRUPTED: Database is corrupted", - "MDBX_PANIC: Environment had fatal error", - "MDBX_VERSION_MISMATCH: DB version mismatch libmdbx", - "MDBX_INVALID: File is not an MDBX file", - "MDBX_MAP_FULL: Environment mapsize limit reached", - "MDBX_DBS_FULL: Too many DBI-handles (maxdbs reached)", - "MDBX_READERS_FULL: Too many readers (maxreaders reached)", - NULL /* MDBX_TLS_FULL (-30789): unused in MDBX */, - "MDBX_TXN_FULL: Transaction has too many dirty pages," - " i.e transaction is too big", - "MDBX_CURSOR_FULL: Internal error - Cursor stack limit reached", - "MDBX_PAGE_FULL: Internal error - Page has no more space", - "MDBX_UNABLE_EXTEND_MAPSIZE: Database engine was unable to extend" - " mapping, e.g. since address space is unavailable or busy," - " or Operation system not supported such operations" - "MDBX_INCOMPATIBLE: Environment or database is not compatible" - " with the requested operation or the specified flags", - "MDBX_BAD_RSLOT: Invalid reuse of reader locktable slot," - " e.g. read-transaction already run for current thread", - "MDBX_BAD_TXN: Transaction is not valid for requested operation," - " e.g. had errored and be must aborted, has a child, or is invalid", - "MDBX_BAD_VALSIZE: Invalid size or alignment of key or data" - " for target database, either invalid subDB name", - "MDBX_BAD_DBI: The specified DBI-handle is invalid" - " or changed by another thread/transaction", - "MDBX_PROBLEM: Unexpected internal error, transaction should be aborted", - "MDBX_BUSY: Another write transaction is running," - " or environment is already used while opening with MDBX_EXCLUSIVE flag", - }; - - if (errnum >= MDBX_KEYEXIST && errnum <= MDBX_LAST_LMDB_ERRCODE) { - int i = errnum - MDBX_KEYEXIST; - return tbl[i]; - } - - switch (errnum) { - case MDBX_SUCCESS: - return "MDBX_SUCCESS: Successful"; - case MDBX_EMULTIVAL: - return "MDBX_EMULTIVAL: The specified key has" - " more than one associated value"; - case MDBX_EBADSIGN: - return "MDBX_EBADSIGN: Wrong signature of a runtime object(s)," - " e.g. memory corruption or double-free"; - case MDBX_WANNA_RECOVERY: - return "MDBX_WANNA_RECOVERY: Database should be recovered," - " but this could NOT be done automatically for now" - " since it opened in read-only mode"; - case MDBX_EKEYMISMATCH: - return "MDBX_EKEYMISMATCH: The given key value is mismatched to the" - " current cursor position"; - case MDBX_TOO_LARGE: - return "MDBX_TOO_LARGE: Database is too large for current system," - " e.g. could NOT be mapped into RAM"; - case MDBX_THREAD_MISMATCH: - return "MDBX_THREAD_MISMATCH: A thread has attempted to use a not" - " owned object, e.g. a transaction that started by another thread"; - case MDBX_TXN_OVERLAPPING: - return "MDBX_TXN_OVERLAPPING: Overlapping read and write transactions for" - " the current thread"; - default: - return NULL; - } -} - -const char *__cold mdbx_strerror_r(int errnum, char *buf, size_t buflen) { - const char *msg = __mdbx_strerr(errnum); - if (!msg && buflen > 0 && buflen < INT_MAX) { -#if defined(_WIN32) || defined(_WIN64) - const DWORD size = FormatMessageA( - FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, - errnum, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, (DWORD)buflen, - NULL); - return size ? buf : NULL; -#elif defined(_GNU_SOURCE) && defined(__GLIBC__) - /* GNU-specific */ - if (errnum > 0) - msg = strerror_r(errnum, buf, buflen); -#elif (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) - /* XSI-compliant */ - if (errnum > 0 && strerror_r(errnum, buf, buflen) == 0) - msg = buf; -#else - if (errnum > 0) { - msg = strerror(errnum); - if (msg) { - strncpy(buf, msg, buflen); - msg = buf; - } - } -#endif - if (!msg) { - (void)snprintf(buf, buflen, "error %d", errnum); - msg = buf; - } - buf[buflen - 1] = '\0'; - } - return msg; -} - -const char *__cold mdbx_strerror(int errnum) { -#if defined(_WIN32) || defined(_WIN64) - static char buf[1024]; - return mdbx_strerror_r(errnum, buf, sizeof(buf)); -#else - const char *msg = __mdbx_strerr(errnum); - if (!msg) { - if (errnum > 0) - msg = strerror(errnum); - if (!msg) { - static char buf[32]; - (void)snprintf(buf, sizeof(buf) - 1, "error %d", errnum); - msg = buf; - } - } - return msg; -#endif -} - -#if defined(_WIN32) || defined(_WIN64) /* Bit of madness for Windows */ -const char *mdbx_strerror_r_ANSI2OEM(int errnum, char *buf, size_t buflen) { - const char *msg = __mdbx_strerr(errnum); - if (!msg && buflen > 0 && buflen < INT_MAX) { - const DWORD size = FormatMessageA( - FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, - errnum, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), buf, (DWORD)buflen, - NULL); - if (size && CharToOemBuffA(buf, buf, size)) - msg = buf; - } - return msg; -} - -const char *mdbx_strerror_ANSI2OEM(int errnum) { - static char buf[1024]; - return mdbx_strerror_r_ANSI2OEM(errnum, buf, sizeof(buf)); -} -#endif /* Bit of madness for Windows */ - -void __cold mdbx_debug_log(int level, const char *function, int line, - const char *fmt, ...) { - va_list args; - - va_start(args, fmt); - if (mdbx_debug_logger) - mdbx_debug_logger(level, function, line, fmt, args); - else { -#if defined(_WIN32) || defined(_WIN64) - if (IsDebuggerPresent()) { - int prefix_len = 0; - char *prefix = nullptr; - if (function && line > 0) - prefix_len = mdbx_asprintf(&prefix, "%s:%d ", function, line); - else if (function) - prefix_len = mdbx_asprintf(&prefix, "%s: ", function); - else if (line > 0) - prefix_len = mdbx_asprintf(&prefix, "%d: ", line); - if (prefix_len > 0 && prefix) { - OutputDebugStringA(prefix); - mdbx_free(prefix); - } - char *msg = nullptr; - int msg_len = mdbx_vasprintf(&msg, fmt, args); - if (msg_len > 0 && msg) { - OutputDebugStringA(msg); - mdbx_free(msg); - } - } -#else - if (function && line > 0) - fprintf(stderr, "%s:%d ", function, line); - else if (function) - fprintf(stderr, "%s: ", function); - else if (line > 0) - fprintf(stderr, "%d: ", line); - vfprintf(stderr, fmt, args); - fflush(stderr); -#endif - } - va_end(args); -} - -/* Dump a key in ascii or hexadecimal. */ -const char *mdbx_dump_val(const MDBX_val *key, char *const buf, - const size_t bufsize) { - if (!key) - return ""; - if (!buf || bufsize < 4) - return nullptr; - if (!key->iov_len) - return ""; - - const uint8_t *const data = key->iov_base; - bool is_ascii = true; - unsigned i; - for (i = 0; is_ascii && i < key->iov_len; i++) - if (data[i] < ' ' || data[i] > 127) - is_ascii = false; - - if (is_ascii) { - int len = - snprintf(buf, bufsize, "%.*s", - (key->iov_len > INT_MAX) ? INT_MAX : (int)key->iov_len, data); - assert(len > 0 && (unsigned)len < bufsize); - (void)len; - } else { - char *const detent = buf + bufsize - 2; - char *ptr = buf; - *ptr++ = '<'; - for (i = 0; i < key->iov_len; i++) { - const ptrdiff_t left = detent - ptr; - assert(left > 0); - int len = snprintf(ptr, left, "%02x", data[i]); - if (len < 0 || len >= left) - break; - ptr += len; - } - if (ptr < detent) { - ptr[0] = '>'; - ptr[1] = '\0'; - } - } - return buf; -} - -/*------------------------------------------------------------------------------ - LY: debug stuff */ - -static const char *mdbx_leafnode_type(MDBX_node *n) { - static const char *const tp[2][2] = {{"", ": DB"}, - {": sub-page", ": sub-DB"}}; - return F_ISSET(node_flags(n), F_BIGDATA) - ? ": overflow page" - : tp[F_ISSET(node_flags(n), F_DUPDATA)] - [F_ISSET(node_flags(n), F_SUBDATA)]; -} - -/* Display all the keys in the page. */ -static __maybe_unused void mdbx_page_list(MDBX_page *mp) { - pgno_t pgno = mp->mp_pgno; - const char *type, *state = IS_DIRTY(mp) ? ", dirty" : ""; - MDBX_node *node; - unsigned i, nkeys, nsize, total = 0; - MDBX_val key; - DKBUF; - - switch (mp->mp_flags & - (P_BRANCH | P_LEAF | P_LEAF2 | P_META | P_OVERFLOW | P_SUBP)) { - case P_BRANCH: - type = "Branch page"; - break; - case P_LEAF: - type = "Leaf page"; - break; - case P_LEAF | P_SUBP: - type = "Leaf sub-page"; - break; - case P_LEAF | P_LEAF2: - type = "Leaf2 page"; - break; - case P_LEAF | P_LEAF2 | P_SUBP: - type = "Leaf2 sub-page"; - break; - case P_OVERFLOW: - mdbx_verbose("Overflow page %" PRIaPGNO " pages %u%s\n", pgno, mp->mp_pages, - state); - return; - case P_META: - mdbx_verbose("Meta-page %" PRIaPGNO " txnid %" PRIu64 "\n", pgno, - page_meta(mp)->mm_txnid_a.inconsistent); - return; - default: - mdbx_verbose("Bad page %" PRIaPGNO " flags 0x%X\n", pgno, mp->mp_flags); - return; - } - - nkeys = page_numkeys(mp); - mdbx_verbose("%s %" PRIaPGNO " numkeys %u%s\n", type, pgno, nkeys, state); - - for (i = 0; i < nkeys; i++) { - if (IS_LEAF2(mp)) { /* LEAF2 pages have no mp_ptrs[] or node headers */ - key.iov_len = nsize = mp->mp_leaf2_ksize; - key.iov_base = page_leaf2key(mp, i, nsize); - total += nsize; - mdbx_verbose("key %u: nsize %u, %s\n", i, nsize, DKEY(&key)); - continue; - } - node = page_node(mp, i); - key.iov_len = node_ks(node); - key.iov_base = node->mn_data; - nsize = (unsigned)(NODESIZE + key.iov_len); - if (IS_BRANCH(mp)) { - mdbx_verbose("key %u: page %" PRIaPGNO ", %s\n", i, node_pgno(node), - DKEY(&key)); - total += nsize; - } else { - if (F_ISSET(node_flags(node), F_BIGDATA)) - nsize += sizeof(pgno_t); - else - nsize += (unsigned)node_ds(node); - total += nsize; - nsize += sizeof(indx_t); - mdbx_verbose("key %u: nsize %u, %s%s\n", i, nsize, DKEY(&key), - mdbx_leafnode_type(node)); - } - total = EVEN(total); - } - mdbx_verbose("Total: header %u + contents %u + unused %u\n", - IS_LEAF2(mp) ? PAGEHDRSZ : PAGEHDRSZ + mp->mp_lower, total, - page_room(mp)); -} - -/*----------------------------------------------------------------------------*/ - -/* Check if there is an inited xcursor, so XCURSOR_REFRESH() is proper */ -#define XCURSOR_INITED(mc) \ - ((mc)->mc_xcursor && ((mc)->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) - -/* Update sub-page pointer, if any, in mc->mc_xcursor. - * Needed when the node which contains the sub-page may have moved. - * Called with mp = mc->mc_pg[mc->mc_top], ki = mc->mc_ki[mc->mc_top]. */ -#define XCURSOR_REFRESH(mc, mp, ki) \ - do { \ - MDBX_page *xr_pg = (mp); \ - MDBX_node *xr_node = page_node(xr_pg, ki); \ - if ((node_flags(xr_node) & (F_DUPDATA | F_SUBDATA)) == F_DUPDATA) \ - (mc)->mc_xcursor->mx_cursor.mc_pg[0] = node_data(xr_node); \ - } while (0) - -/* Perform act while tracking temporary cursor mn */ -#define WITH_CURSOR_TRACKING(mn, act) \ - do { \ - mdbx_cassert(&(mn), \ - mn.mc_txn->mt_cursors != NULL /* must be not rdonly txt */); \ - MDBX_cursor mc_dummy, **tp = &(mn).mc_txn->mt_cursors[mn.mc_dbi]; \ - MDBX_cursor *tracked = &(mn); \ - if ((mn).mc_flags & C_SUB) { \ - mc_dummy.mc_flags = C_INITIALIZED; \ - mc_dummy.mc_xcursor = (MDBX_xcursor *)&(mn); \ - tracked = &mc_dummy; \ - } \ - tracked->mc_next = *tp; \ - *tp = tracked; \ - { act; } \ - *tp = tracked->mc_next; \ - } while (0) - -int mdbx_cmp(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, - const MDBX_val *b) { - mdbx_assert(NULL, txn->mt_signature == MDBX_MT_SIGNATURE); - return txn->mt_dbxs[dbi].md_cmp(a, b); -} - -int mdbx_dcmp(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *a, - const MDBX_val *b) { - mdbx_assert(NULL, txn->mt_signature == MDBX_MT_SIGNATURE); - return txn->mt_dbxs[dbi].md_dcmp(a, b); -} - -/* Allocate memory for a page. - * Re-use old malloc'd pages first for singletons, otherwise just malloc. - * Set MDBX_TXN_ERROR on failure. */ -static MDBX_page *mdbx_page_malloc(MDBX_txn *txn, unsigned num) { - MDBX_env *env = txn->mt_env; - MDBX_page *np = env->me_dpages; - size_t size = env->me_psize; - if (likely(num == 1 && np)) { - ASAN_UNPOISON_MEMORY_REGION(np, size); - VALGRIND_MEMPOOL_ALLOC(env, np, size); - VALGRIND_MAKE_MEM_DEFINED(&np->mp_next, sizeof(np->mp_next)); - env->me_dpages = np->mp_next; - } else { - size = pgno2bytes(env, num); - np = mdbx_malloc(size); - if (unlikely(!np)) { - txn->mt_flags |= MDBX_TXN_ERROR; - return np; - } - VALGRIND_MEMPOOL_ALLOC(env, np, size); - } - - if ((env->me_flags & MDBX_NOMEMINIT) == 0) { - /* For a single page alloc, we init everything after the page header. - * For multi-page, we init the final page; if the caller needed that - * many pages they will be filling in at least up to the last page. */ - size_t skip = PAGEHDRSZ; - if (num > 1) - skip += pgno2bytes(env, num - 1); - memset((char *)np + skip, 0, size - skip); - } -#if MDBX_DEBUG - np->mp_pgno = 0; -#endif - VALGRIND_MAKE_MEM_UNDEFINED(np, size); - np->mp_flags = 0; - np->mp_pages = num; - return np; -} - -/* Free a dirty page */ -static void mdbx_dpage_free(MDBX_env *env, MDBX_page *dp, unsigned pages) { -#if MDBX_DEBUG - dp->mp_pgno = MAX_PAGENO + 1; -#endif - if (pages == 1) { - dp->mp_next = env->me_dpages; - VALGRIND_MEMPOOL_FREE(env, dp); - env->me_dpages = dp; - } else { - /* large pages just get freed directly */ - VALGRIND_MEMPOOL_FREE(env, dp); - mdbx_free(dp); - } -} - -/* Return all dirty pages to dpage list */ -static void mdbx_dlist_free(MDBX_txn *txn) { - MDBX_env *env = txn->mt_env; - const MDBX_DPL dl = txn->tw.dirtylist; - const size_t n = dl->length; - - for (size_t i = 1; i <= n; i++) { - MDBX_page *dp = dl[i].ptr; - mdbx_dpage_free(env, dp, IS_OVERFLOW(dp) ? dp->mp_pages : 1); - } - - mdbx_dpl_clear(dl); -} - -static __always_inline MDBX_db *mdbx_outer_db(MDBX_cursor *mc) { - mdbx_cassert(mc, (mc->mc_flags & C_SUB) != 0); - MDBX_xcursor *mx = container_of(mc->mc_db, MDBX_xcursor, mx_db); - MDBX_cursor_couple *couple = container_of(mx, MDBX_cursor_couple, inner); - mdbx_cassert(mc, mc->mc_db == &couple->outer.mc_xcursor->mx_db); - mdbx_cassert(mc, mc->mc_dbx == &couple->outer.mc_xcursor->mx_dbx); - return couple->outer.mc_db; -} - -static __cold __maybe_unused bool mdbx_dirtylist_check(MDBX_txn *txn) { - if (!mdbx_audit_enabled()) - return true; - - unsigned loose = 0; - for (unsigned i = txn->tw.dirtylist->length; i > 0; --i) { - const MDBX_page *const dp = txn->tw.dirtylist[i].ptr; - if (!dp) - continue; - mdbx_tassert(txn, dp->mp_pgno == txn->tw.dirtylist[i].pgno); - if (unlikely(dp->mp_pgno != txn->tw.dirtylist[i].pgno)) - return false; - - mdbx_tassert(txn, dp->mp_flags & P_DIRTY); - if (unlikely((dp->mp_flags & P_DIRTY) == 0)) - return false; - if (dp->mp_flags & P_LOOSE) { - mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); - if (unlikely(dp->mp_flags != (P_LOOSE | P_DIRTY))) - return false; - loose += 1; - } - - const unsigned num = IS_OVERFLOW(dp) ? dp->mp_pages : 1; - mdbx_tassert(txn, txn->mt_next_pgno >= dp->mp_pgno + num); - if (unlikely(txn->mt_next_pgno < dp->mp_pgno + num)) - return false; - - if (i < txn->tw.dirtylist->sorted) { - mdbx_tassert(txn, txn->tw.dirtylist[i + 1].pgno >= dp->mp_pgno + num); - if (unlikely(txn->tw.dirtylist[i + 1].pgno < dp->mp_pgno + num)) - return false; - } - - const unsigned rpa = mdbx_pnl_search(txn->tw.reclaimed_pglist, dp->mp_pgno); - mdbx_tassert(txn, rpa > MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) || - txn->tw.reclaimed_pglist[rpa] != dp->mp_pgno); - if (rpa <= MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) && - unlikely(txn->tw.reclaimed_pglist[rpa] == dp->mp_pgno)) - return false; - if (num > 1) { - const unsigned rpb = - mdbx_pnl_search(txn->tw.reclaimed_pglist, dp->mp_pgno + num - 1); - mdbx_tassert(txn, rpa == rpb); - if (unlikely(rpa != rpb)) - return false; - } - } - - mdbx_tassert(txn, loose == txn->tw.loose_count); - if (unlikely(loose != txn->tw.loose_count)) - return false; - - if (txn->tw.dirtylist->length - txn->tw.dirtylist->sorted < 16) { - for (unsigned i = 1; i <= MDBX_PNL_SIZE(txn->tw.retired_pages); ++i) { - const MDBX_page *const dp = - mdbx_dpl_find(txn->tw.dirtylist, txn->tw.retired_pages[i]); - mdbx_tassert(txn, !dp); - if (unlikely(dp)) - return false; - } - } - - return true; -} - -static void mdbx_refund_reclaimed(MDBX_txn *txn) { - /* Scanning in descend order */ - pgno_t next_pgno = txn->mt_next_pgno; - const MDBX_PNL pnl = txn->tw.reclaimed_pglist; - mdbx_tassert(txn, MDBX_PNL_SIZE(pnl) && MDBX_PNL_MOST(pnl) == next_pgno - 1); -#if MDBX_PNL_ASCENDING - unsigned i = MDBX_PNL_SIZE(pnl); - mdbx_tassert(txn, pnl[i] == next_pgno - 1); - while (--next_pgno, --i > 0 && pnl[i] == next_pgno - 1) - ; - MDBX_PNL_SIZE(pnl) = i; -#else - unsigned i = 1; - mdbx_tassert(txn, pnl[i] == next_pgno - 1); - unsigned len = MDBX_PNL_SIZE(pnl); - while (--next_pgno, ++i <= len && pnl[i] == next_pgno - 1) - ; - MDBX_PNL_SIZE(pnl) = len -= i - 1; - for (unsigned move = 0; move < len; ++move) - pnl[1 + move] = pnl[i + move]; -#endif - mdbx_verbose("refunded %" PRIaPGNO " pages: %" PRIaPGNO " -> %" PRIaPGNO, - txn->mt_next_pgno - next_pgno, txn->mt_next_pgno, next_pgno); - txn->mt_next_pgno = next_pgno; - mdbx_tassert( - txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); -} - -static void mdbx_refund_loose(MDBX_txn *txn) { - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - mdbx_tassert(txn, txn->tw.loose_pages != nullptr); - mdbx_tassert(txn, txn->tw.loose_count > 0); - - const MDBX_DPL dl = txn->tw.dirtylist; - mdbx_tassert(txn, dl->length >= txn->tw.loose_count); - mdbx_tassert(txn, txn->tw.spill_pages == nullptr || - dl->length >= MDBX_PNL_SIZE(txn->tw.spill_pages)); - - pgno_t onstack[MDBX_CACHELINE_SIZE * 8 / sizeof(pgno_t)]; - MDBX_PNL suitable = onstack; - - if (dl->length - dl->sorted > txn->tw.loose_count) { - /* Dirty list is useless since unsorted. */ - if (bytes2pnl(sizeof(onstack)) < txn->tw.loose_count) { - suitable = mdbx_pnl_alloc(txn->tw.loose_count); - if (unlikely(!suitable)) - return /* this is not a reason for transaction fail */; - } - - /* Collect loose-pages which may be refunded. */ - mdbx_tassert(txn, txn->mt_next_pgno >= MIN_PAGENO + txn->tw.loose_count); - pgno_t most = MIN_PAGENO; - unsigned w = 0; - for (const MDBX_page *dp = txn->tw.loose_pages; dp; dp = dp->mp_next) { - mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); - mdbx_tassert(txn, txn->mt_next_pgno > dp->mp_pgno); - if (likely(txn->mt_next_pgno - txn->tw.loose_count <= dp->mp_pgno)) { - mdbx_tassert(txn, - w < ((suitable == onstack) ? bytes2pnl(sizeof(onstack)) - : MDBX_PNL_ALLOCLEN(suitable))); - suitable[++w] = dp->mp_pgno; - most = (dp->mp_pgno > most) ? dp->mp_pgno : most; - } - } - - if (most + 1 == txn->mt_next_pgno) { - /* Sort suitable list and refund pages at the tail. */ - MDBX_PNL_SIZE(suitable) = w; - mdbx_pnl_sort(suitable); - - /* Scanning in descend order */ - const int step = MDBX_PNL_ASCENDING ? -1 : 1; - const int begin = MDBX_PNL_ASCENDING ? MDBX_PNL_SIZE(suitable) : 1; - const int end = MDBX_PNL_ASCENDING ? 0 : MDBX_PNL_SIZE(suitable) + 1; - mdbx_tassert(txn, suitable[begin] >= suitable[end - step]); - mdbx_tassert(txn, most == suitable[begin]); - - for (int i = begin + step; i != end; i += step) { - if (suitable[i] != most - 1) - break; - most -= 1; - } - const unsigned refunded = txn->mt_next_pgno - most; - mdbx_verbose("refund-suitable %u pages %" PRIaPGNO " -> %" PRIaPGNO, - refunded, most, txn->mt_next_pgno); - txn->tw.loose_count -= refunded; - txn->tw.dirtyroom += refunded; - txn->mt_next_pgno = most; - - /* Filter-out dirty list */ - unsigned r = 0; - w = 0; - if (dl->sorted) { - do { - if (dl[++r].pgno < most) { - if (++w != r) - dl[w] = dl[r]; - } - } while (r < dl->sorted); - dl->sorted = w; - } - while (r < dl->length) { - if (dl[++r].pgno < most) { - if (++w != r) - dl[w] = dl[r]; - } - } - dl->length = w; - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - goto unlink_loose; - } - } else { - /* Dirtylist is mostly sorted, just refund loose pages at the end. */ - mdbx_dpl_sort(dl); - mdbx_tassert(txn, dl->length < 2 || dl[1].pgno < dl[dl->length].pgno); - mdbx_tassert(txn, dl->sorted == dl->length); - - /* Scan dirtylist tail-forward and cutoff suitable pages. */ - while (dl->length && dl[dl->length].pgno == txn->mt_next_pgno - 1 && - dl[dl->length].ptr->mp_flags == (P_LOOSE | P_DIRTY)) { - MDBX_page *dp = dl[dl->length].ptr; - mdbx_verbose("refund-sorted page %" PRIaPGNO, dp->mp_pgno); - mdbx_tassert(txn, dp->mp_pgno == dl[dl->length].pgno); - dl->length -= 1; - } - - if (dl->sorted != dl->length) { - const unsigned refunded = dl->sorted - dl->length; - dl->sorted = dl->length; - txn->tw.loose_count -= refunded; - txn->tw.dirtyroom += refunded; - txn->mt_next_pgno -= refunded; - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - - /* Filter-out loose chain & dispose refunded pages. */ - unlink_loose: - for (MDBX_page **link = &txn->tw.loose_pages; *link;) { - MDBX_page *dp = *link; - mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); - if (txn->mt_next_pgno > dp->mp_pgno) { - link = &dp->mp_next; - } else { - *link = dp->mp_next; - if ((txn->mt_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(txn->mt_env, dp, 1); - } - } - } - } - - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - if (suitable != onstack) - mdbx_pnl_free(suitable); - txn->tw.loose_refund_wl = txn->mt_next_pgno; -} - -static bool mdbx_refund(MDBX_txn *txn) { - const pgno_t before = txn->mt_next_pgno; - - if (txn->tw.loose_pages && txn->tw.loose_refund_wl > txn->mt_next_pgno) - mdbx_refund_loose(txn); - - while (true) { - if (MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) == 0 || - MDBX_PNL_MOST(txn->tw.reclaimed_pglist) != txn->mt_next_pgno - 1) - break; - - mdbx_refund_reclaimed(txn); - if (!txn->tw.loose_pages || txn->tw.loose_refund_wl <= txn->mt_next_pgno) - break; - - const pgno_t memo = txn->mt_next_pgno; - mdbx_refund_loose(txn); - if (memo == txn->mt_next_pgno) - break; - } - - return before != txn->mt_next_pgno; -} - -static __cold void mdbx_kill_page(MDBX_env *env, MDBX_page *mp, pgno_t pgno, - unsigned npages) { - mdbx_assert(env, pgno >= NUM_METAS && npages); - if (IS_DIRTY(mp) || (env->me_flags & MDBX_WRITEMAP)) { - const size_t bytes = pgno2bytes(env, npages); - memset(mp, -1, bytes); - mp->mp_pgno = pgno; - if ((env->me_flags & MDBX_WRITEMAP) == 0) - mdbx_pwrite(env->me_lazy_fd, mp, bytes, pgno2bytes(env, pgno)); - } else { - struct iovec iov[MDBX_COMMIT_PAGES]; - iov[0].iov_len = env->me_psize; - iov[0].iov_base = (char *)env->me_pbuf + env->me_psize; - size_t iov_off = pgno2bytes(env, pgno); - unsigned n = 1; - while (--npages) { - iov[n] = iov[0]; - if (++n == MDBX_COMMIT_PAGES) { - mdbx_pwritev(env->me_lazy_fd, iov, MDBX_COMMIT_PAGES, iov_off, - pgno2bytes(env, MDBX_COMMIT_PAGES)); - iov_off += pgno2bytes(env, MDBX_COMMIT_PAGES); - n = 0; - } - } - mdbx_pwritev(env->me_lazy_fd, iov, n, iov_off, pgno2bytes(env, n)); - } -} - -/* Retire, loosen or free a single page. - * - * Saves single pages to a list for future reuse - * in this same txn. It has been pulled from the GC - * and already resides on the dirty list, but has been - * deleted. Use these pages first before pulling again - * from the GC. - * - * If the page wasn't dirtied in this txn, just add it - * to this txn's free list. */ - -static int mdbx_page_loose(MDBX_txn *txn, MDBX_page *mp) { - const unsigned npages = IS_OVERFLOW(mp) ? mp->mp_pages : 1; - const pgno_t pgno = mp->mp_pgno; - - mp->mp_txnid = INVALID_TXNID; - if (txn->mt_parent) { - mdbx_tassert(txn, (txn->mt_env->me_flags & MDBX_WRITEMAP) == 0); - mdbx_tassert(txn, mp != pgno2page(txn->mt_env, pgno)); - /* If txn has a parent, make sure the page is in our dirty list. */ - MDBX_page *dp = mdbx_dpl_find(txn->tw.dirtylist, pgno); - /* TODO: use extended flag-mask to track parent's dirty-pages */ - if (dp == nullptr) { - mp->mp_next = txn->tw.retired2parent_pages; - txn->tw.retired2parent_pages = mp; - txn->tw.retired2parent_count += npages; - return MDBX_SUCCESS; - } - if (unlikely(mp != dp)) { /* bad cursor? */ - mdbx_error( - "wrong page 0x%p #%" PRIaPGNO " in the dirtylist, expecting %p", - __Wpedantic_format_voidptr(dp), pgno, __Wpedantic_format_voidptr(mp)); - txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PROBLEM; - } - /* ok, it's ours */ - } - - mdbx_debug("loosen page %" PRIaPGNO, pgno); - const bool is_dirty = IS_DIRTY(mp); - if (MDBX_DEBUG || unlikely((txn->mt_env->me_flags & MDBX_PAGEPERTURB) != 0)) { - mdbx_kill_page(txn->mt_env, mp, pgno, npages); - VALGRIND_MAKE_MEM_UNDEFINED(mp, PAGEHDRSZ); - } - VALGRIND_MAKE_MEM_NOACCESS(page_data(mp), - pgno2bytes(txn->mt_env, npages) - PAGEHDRSZ); - ASAN_POISON_MEMORY_REGION(page_data(mp), - pgno2bytes(txn->mt_env, npages) - PAGEHDRSZ); - - if (unlikely(npages > - 1 /* overflow pages doesn't comes to the loose-list */)) { - if (is_dirty) { - /* Remove from dirty list */ - MDBX_page *dp = mdbx_dpl_remove(txn->tw.dirtylist, pgno); - if (unlikely(dp != mp)) { - mdbx_error("not found page 0x%p #%" PRIaPGNO " in the dirtylist", - __Wpedantic_format_voidptr(mp), pgno); - txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PROBLEM; - } - txn->tw.dirtyroom++; - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - if ((txn->mt_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(txn->mt_env, mp, npages); - } - - if (unlikely(pgno + npages == txn->mt_next_pgno)) { - txn->mt_next_pgno = pgno; - mdbx_refund(txn); - return MDBX_SUCCESS; - } - - int rc = mdbx_pnl_insert_range(&txn->tw.reclaimed_pglist, pgno, npages); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - return MDBX_SUCCESS; - } - - mp->mp_flags = P_LOOSE | P_DIRTY; - mp->mp_next = txn->tw.loose_pages; - txn->tw.loose_pages = mp; - txn->tw.loose_count++; - if (unlikely(txn->mt_next_pgno == mp->mp_pgno + 1)) - mdbx_refund(txn); - - return MDBX_SUCCESS; -} - -static int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp) { - const unsigned npages = IS_OVERFLOW(mp) ? mp->mp_pages : 1; - const pgno_t pgno = mp->mp_pgno; - MDBX_txn *const txn = mc->mc_txn; - - if (unlikely(mc->mc_flags & C_SUB)) { - MDBX_db *outer = mdbx_outer_db(mc); - mdbx_cassert(mc, !IS_BRANCH(mp) || outer->md_branch_pages > 0); - outer->md_branch_pages -= IS_BRANCH(mp); - mdbx_cassert(mc, !IS_LEAF(mp) || outer->md_leaf_pages > 0); - outer->md_leaf_pages -= IS_LEAF(mp); - mdbx_cassert(mc, !IS_OVERFLOW(mp)); - } - mdbx_cassert(mc, !IS_BRANCH(mp) || mc->mc_db->md_branch_pages > 0); - mc->mc_db->md_branch_pages -= IS_BRANCH(mp); - mdbx_cassert(mc, !IS_LEAF(mp) || mc->mc_db->md_leaf_pages > 0); - mc->mc_db->md_leaf_pages -= IS_LEAF(mp); - mdbx_cassert(mc, !IS_OVERFLOW(mp) || mc->mc_db->md_overflow_pages >= npages); - mc->mc_db->md_overflow_pages -= IS_OVERFLOW(mp) ? npages : 0; - - if (IS_DIRTY(mp)) { - int rc = mdbx_page_loose(txn, mp); - if (unlikely(rc != MDBX_SUCCESS)) - mc->mc_flags &= ~(C_INITIALIZED | C_EOF); - return rc; - } - - if (txn->tw.spill_pages) { - const unsigned i = mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1); - if (i) { - /* This page is no longer spilled */ - mdbx_tassert(txn, i == MDBX_PNL_SIZE(txn->tw.spill_pages) || - txn->tw.spill_pages[i + 1] >= (pgno + npages) << 1); - txn->tw.spill_pages[i] |= 1; - if (i == MDBX_PNL_SIZE(txn->tw.spill_pages)) - MDBX_PNL_SIZE(txn->tw.spill_pages) -= 1; - int rc = mdbx_page_loose(txn, mp); - if (unlikely(rc != MDBX_SUCCESS)) - mc->mc_flags &= ~(C_INITIALIZED | C_EOF); - return rc; - } - } - - mdbx_tassert(txn, mp == pgno2page(txn->mt_env, pgno)); - int rc = mdbx_pnl_append_range(&txn->tw.retired_pages, pgno, npages); - mdbx_tassert(txn, mdbx_dpl_find(txn->tw.dirtylist, pgno) == nullptr); - return rc; -} - -static __must_check_result __always_inline int -mdbx_retire_pgno(MDBX_cursor *mc, const pgno_t pgno) { - MDBX_page *mp; - int rc = mdbx_page_get(mc, pgno, &mp, NULL); - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_page_retire(mc, mp); - return rc; -} - -/* Set or clear P_KEEP in dirty, non-overflow, non-sub pages watched by txn. - * - * [in] mc A cursor handle for the current operation. - * [in] pflags Flags of the pages to update: - * - P_DIRTY to set P_KEEP, - * - P_DIRTY|P_KEEP to clear it. - * [in] all No shortcuts. Needed except after a full mdbx_page_flush(). - * - * Returns 0 on success, non-zero on failure. */ -static int mdbx_pages_xkeep(MDBX_cursor *mc, unsigned pflags, bool all) { - const unsigned Mask = P_SUBP | P_DIRTY | P_LOOSE | P_KEEP; - MDBX_txn *txn = mc->mc_txn; - MDBX_cursor *m3, *m0 = mc; - MDBX_xcursor *mx; - MDBX_page *dp, *mp; - unsigned i, j; - int rc = MDBX_SUCCESS; - - /* Mark pages seen by cursors: First m0, then tracked cursors */ - for (i = txn->mt_numdbs;;) { - if (mc->mc_flags & C_INITIALIZED) { - for (m3 = mc;; m3 = &mx->mx_cursor) { - mp = NULL; - for (j = 0; j < m3->mc_snum; j++) { - mp = m3->mc_pg[j]; - if ((mp->mp_flags & Mask) == pflags) - mp->mp_flags ^= P_KEEP; - } - mx = m3->mc_xcursor; - /* Proceed to mx if it is at a sub-database */ - if (!(mx && (mx->mx_cursor.mc_flags & C_INITIALIZED))) - break; - if (!(mp && IS_LEAF(mp))) - break; - if (!(node_flags(page_node(mp, m3->mc_ki[j - 1])) & F_SUBDATA)) - break; - } - } - mc = mc->mc_next; - for (; !mc || mc == m0; mc = txn->mt_cursors[--i]) - if (i == 0) - goto mark_done; - } - -mark_done: - if (all) { - /* Mark dirty root pages */ - for (i = 0; i < txn->mt_numdbs; i++) { - if (txn->mt_dbflags[i] & DB_DIRTY) { - pgno_t pgno = txn->mt_dbs[i].md_root; - if (pgno == P_INVALID) - continue; - int level; - if (unlikely((rc = mdbx_page_get(m0, pgno, &dp, &level)) != - MDBX_SUCCESS)) - break; - if ((dp->mp_flags & Mask) == pflags && level <= 1) - dp->mp_flags ^= P_KEEP; - } - } - } - - return rc; -} - -/* Spill pages from the dirty list back to disk. - * This is intended to prevent running into MDBX_TXN_FULL situations, - * but note that they may still occur in a few cases: - * - * 1) our estimate of the txn size could be too small. Currently this - * seems unlikely, except with a large number of MDBX_MULTIPLE items. - * - * 2) child txns may run out of space if their parents dirtied a - * lot of pages and never spilled them. TODO: we probably should do - * a preemptive spill during mdbx_txn_begin() of a child txn, if - * the parent's dirtyroom is below a given threshold. - * - * Otherwise, if not using nested txns, it is expected that apps will - * not run into MDBX_TXN_FULL any more. The pages are flushed to disk - * the same way as for a txn commit, e.g. their P_DIRTY flag is cleared. - * If the txn never references them again, they can be left alone. - * If the txn only reads them, they can be used without any fuss. - * If the txn writes them again, they can be dirtied immediately without - * going thru all of the work of mdbx_page_touch(). Such references are - * handled by mdbx_page_unspill(). - * - * Also note, we never spill DB root pages, nor pages of active cursors, - * because we'll need these back again soon anyway. And in nested txns, - * we can't spill a page in a child txn if it was already spilled in a - * parent txn. That would alter the parent txns' data even though - * the child hasn't committed yet, and we'd have no way to undo it if - * the child aborted. - * - * [in] mc cursor A cursor handle identifying the transaction and - * database for which we are checking space. - * [in] key For a put operation, the key being stored. - * [in] data For a put operation, the data being stored. - * - * Returns 0 on success, non-zero on failure. */ -static int mdbx_page_spill(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data) { - if (mc->mc_flags & C_SUB) - return MDBX_SUCCESS; - - MDBX_txn *txn = mc->mc_txn; - MDBX_DPL dl = txn->tw.dirtylist; - - /* Estimate how much space this op will take */ - pgno_t i = mc->mc_db->md_depth; - /* Named DBs also dirty the main DB */ - if (mc->mc_dbi >= CORE_DBS) - i += txn->mt_dbs[MAIN_DBI].md_depth; - /* For puts, roughly factor in the key+data size */ - if (key) - i += bytes2pgno(txn->mt_env, node_size(key, data) + txn->mt_env->me_psize); - i += i; /* double it for good measure */ - pgno_t need = i; - - if (txn->tw.dirtyroom > i) - return MDBX_SUCCESS; - - if (!txn->tw.spill_pages) { - txn->tw.spill_pages = mdbx_pnl_alloc(MDBX_DPL_TXNFULL / 8); - if (unlikely(!txn->tw.spill_pages)) - return MDBX_ENOMEM; - } else { - /* purge deleted slots */ - MDBX_PNL sl = txn->tw.spill_pages; - pgno_t num = MDBX_PNL_SIZE(sl), j = 0; - for (i = 1; i <= num; i++) { - if ((sl[i] & 1) == 0) - sl[++j] = sl[i]; - } - MDBX_PNL_SIZE(sl) = j; - } - - /* Preserve pages which may soon be dirtied again */ - int rc = mdbx_pages_xkeep(mc, P_DIRTY, true); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - /* Less aggressive spill - we originally spilled the entire dirty list, - * with a few exceptions for cursor pages and DB root pages. But this - * turns out to be a lot of wasted effort because in a large txn many - * of those pages will need to be used again. So now we spill only 1/8th - * of the dirty pages. Testing revealed this to be a good tradeoff, - * better than 1/2, 1/4, or 1/10. */ - if (need < MDBX_DPL_TXNFULL / 8) - need = MDBX_DPL_TXNFULL / 8; - - /* Save the page IDs of all the pages we're flushing */ - /* flush from the tail forward, this saves a lot of shifting later on. */ - for (i = dl->length; i && need; i--) { - pgno_t pn = dl[i].pgno << 1; - MDBX_page *dp = dl[i].ptr; - if (dp->mp_flags & (P_LOOSE | P_KEEP)) - continue; - /* Can't spill twice, - * make sure it's not already in a parent's spill list. */ - if (txn->mt_parent) { - MDBX_txn *parent; - for (parent = txn->mt_parent; parent; parent = parent->mt_parent) { - if (parent->tw.spill_pages && - mdbx_pnl_exist(parent->tw.spill_pages, pn)) { - dp->mp_flags |= P_KEEP; - break; - } - } - if (parent) - continue; - } - rc = mdbx_pnl_append(&txn->tw.spill_pages, pn); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - need--; - } - mdbx_pnl_sort(txn->tw.spill_pages); - - /* Flush the spilled part of dirty list */ - rc = mdbx_page_flush(txn, i); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - /* Reset any dirty pages we kept that page_flush didn't see */ - rc = mdbx_pages_xkeep(mc, P_DIRTY | P_KEEP, i != 0); - -bailout: - txn->mt_flags |= rc ? MDBX_TXN_ERROR : MDBX_TXN_SPILLS; - return rc; -} - -/*----------------------------------------------------------------------------*/ - -static __always_inline bool meta_bootid_match(const MDBX_meta *meta) { - return meta->mm_bootid.x == bootid.x && meta->mm_bootid.y == bootid.y && - (bootid.x | bootid.y) != 0; -} - -static bool meta_weak_acceptable(const MDBX_env *env, const MDBX_meta *meta, - const int lck_exlusive) { - return lck_exlusive ? /* exclusive lock */ meta_bootid_match(meta) - : /* db already opened */ env->me_lck && - (env->me_lck->mti_envmode & MDBX_RDONLY) == 0; -} - -#define METAPAGE(env, n) page_meta(pgno2page(env, n)) -#define METAPAGE_END(env) METAPAGE(env, NUM_METAS) - -static __inline txnid_t meta_txnid(const MDBX_env *env, const MDBX_meta *meta, - const bool allow_volatile) { - mdbx_assert(env, meta >= METAPAGE(env, 0) || meta < METAPAGE_END(env)); - txnid_t a = safe64_read(&meta->mm_txnid_a); - txnid_t b = safe64_read(&meta->mm_txnid_b); - if (allow_volatile) - return (a == b) ? a : 0; - mdbx_assert(env, a == b); - return a; -} - -static __inline txnid_t mdbx_meta_txnid_stable(const MDBX_env *env, - const MDBX_meta *meta) { - return meta_txnid(env, meta, false); -} - -static __inline txnid_t mdbx_meta_txnid_fluid(const MDBX_env *env, - const MDBX_meta *meta) { - return meta_txnid(env, meta, true); -} - -static __inline void mdbx_meta_update_begin(const MDBX_env *env, - MDBX_meta *meta, txnid_t txnid) { - mdbx_assert(env, meta >= METAPAGE(env, 0) || meta < METAPAGE_END(env)); - mdbx_assert(env, meta->mm_txnid_a.inconsistent < txnid && - meta->mm_txnid_b.inconsistent < txnid); - (void)env; - safe64_update(&meta->mm_txnid_a, txnid); -} - -static __inline void mdbx_meta_update_end(const MDBX_env *env, MDBX_meta *meta, - txnid_t txnid) { - mdbx_assert(env, meta >= METAPAGE(env, 0) || meta < METAPAGE_END(env)); - mdbx_assert(env, meta->mm_txnid_a.inconsistent == txnid); - mdbx_assert(env, meta->mm_txnid_b.inconsistent < txnid); - (void)env; - mdbx_jitter4testing(true); - meta->mm_bootid = bootid; - safe64_update(&meta->mm_txnid_b, txnid); -} - -static __inline void mdbx_meta_set_txnid(const MDBX_env *env, MDBX_meta *meta, - txnid_t txnid) { - mdbx_assert(env, meta < METAPAGE(env, 0) || meta > METAPAGE_END(env)); - (void)env; - /* update inconsistent since this function used ONLY for filling meta-image - * for writing, but not the actual meta-page */ - meta->mm_bootid = bootid; - meta->mm_txnid_a.inconsistent = txnid; - meta->mm_txnid_b.inconsistent = txnid; -} - -static __inline uint64_t mdbx_meta_sign(const MDBX_meta *meta) { - uint64_t sign = MDBX_DATASIGN_NONE; -#if 0 /* TODO */ - sign = hippeus_hash64(...); -#else - (void)meta; -#endif - /* LY: newer returns MDBX_DATASIGN_NONE or MDBX_DATASIGN_WEAK */ - return (sign > MDBX_DATASIGN_WEAK) ? sign : ~sign; -} - -enum meta_choise_mode { prefer_last, prefer_steady }; - -static __inline bool mdbx_meta_ot(const enum meta_choise_mode mode, - const MDBX_env *env, const MDBX_meta *a, - const MDBX_meta *b) { - mdbx_jitter4testing(true); - txnid_t txnid_a = mdbx_meta_txnid_fluid(env, a); - txnid_t txnid_b = mdbx_meta_txnid_fluid(env, b); - - mdbx_jitter4testing(true); - switch (mode) { - default: - assert(false); - __unreachable(); - /* fall through */ - __fallthrough; - case prefer_steady: - if (META_IS_STEADY(a) != META_IS_STEADY(b)) - return META_IS_STEADY(b); - /* fall through */ - __fallthrough; - case prefer_last: - mdbx_jitter4testing(true); - if (txnid_a == txnid_b) - return META_IS_STEADY(b); - return txnid_a < txnid_b; - } -} - -static __inline bool mdbx_meta_eq(const MDBX_env *env, const MDBX_meta *a, - const MDBX_meta *b) { - mdbx_jitter4testing(true); - const txnid_t txnid = mdbx_meta_txnid_fluid(env, a); - if (!txnid || txnid != mdbx_meta_txnid_fluid(env, b)) - return false; - - mdbx_jitter4testing(true); - if (META_IS_STEADY(a) != META_IS_STEADY(b)) - return false; - - mdbx_jitter4testing(true); - return true; -} - -static int mdbx_meta_eq_mask(const MDBX_env *env) { - MDBX_meta *m0 = METAPAGE(env, 0); - MDBX_meta *m1 = METAPAGE(env, 1); - MDBX_meta *m2 = METAPAGE(env, 2); - - int rc = mdbx_meta_eq(env, m0, m1) ? 1 : 0; - if (mdbx_meta_eq(env, m1, m2)) - rc += 2; - if (mdbx_meta_eq(env, m2, m0)) - rc += 4; - return rc; -} - -static __inline MDBX_meta *mdbx_meta_recent(const enum meta_choise_mode mode, - const MDBX_env *env, MDBX_meta *a, - MDBX_meta *b) { - const bool a_older_that_b = mdbx_meta_ot(mode, env, a, b); - mdbx_assert(env, !mdbx_meta_eq(env, a, b)); - return a_older_that_b ? b : a; -} - -static __inline MDBX_meta *mdbx_meta_ancient(const enum meta_choise_mode mode, - const MDBX_env *env, MDBX_meta *a, - MDBX_meta *b) { - const bool a_older_that_b = mdbx_meta_ot(mode, env, a, b); - mdbx_assert(env, !mdbx_meta_eq(env, a, b)); - return a_older_that_b ? a : b; -} - -static __inline MDBX_meta * -mdbx_meta_mostrecent(const enum meta_choise_mode mode, const MDBX_env *env) { - MDBX_meta *m0 = METAPAGE(env, 0); - MDBX_meta *m1 = METAPAGE(env, 1); - MDBX_meta *m2 = METAPAGE(env, 2); - - MDBX_meta *head = mdbx_meta_recent(mode, env, m0, m1); - head = mdbx_meta_recent(mode, env, head, m2); - return head; -} - -static MDBX_meta *mdbx_meta_steady(const MDBX_env *env) { - return mdbx_meta_mostrecent(prefer_steady, env); -} - -static MDBX_meta *mdbx_meta_head(const MDBX_env *env) { - return mdbx_meta_mostrecent(prefer_last, env); -} - -static txnid_t mdbx_recent_committed_txnid(const MDBX_env *env) { - while (true) { - const MDBX_meta *head = mdbx_meta_head(env); - const txnid_t recent = mdbx_meta_txnid_fluid(env, head); - mdbx_compiler_barrier(); - if (likely(head == mdbx_meta_head(env) && - recent == mdbx_meta_txnid_fluid(env, head))) - return recent; - } -} - -static txnid_t mdbx_recent_steady_txnid(const MDBX_env *env) { - while (true) { - const MDBX_meta *head = mdbx_meta_steady(env); - const txnid_t recent = mdbx_meta_txnid_fluid(env, head); - mdbx_compiler_barrier(); - if (likely(head == mdbx_meta_steady(env) && - recent == mdbx_meta_txnid_fluid(env, head))) - return recent; - } -} - -static const char *mdbx_durable_str(const MDBX_meta *const meta) { - if (META_IS_STEADY(meta)) - return (meta->mm_datasync_sign == mdbx_meta_sign(meta)) ? "Steady" - : "Tainted"; - return "Weak"; -} - -/*----------------------------------------------------------------------------*/ - -/* Find oldest txnid still referenced. */ -static txnid_t mdbx_find_oldest(MDBX_txn *txn) { - mdbx_tassert(txn, (txn->mt_flags & MDBX_RDONLY) == 0); - MDBX_env *env = txn->mt_env; - const txnid_t edge = mdbx_recent_steady_txnid(env); - mdbx_tassert(txn, edge <= txn->mt_txnid); - - MDBX_lockinfo *const lck = env->me_lck; - if (unlikely(lck == NULL /* exclusive mode */)) - return env->me_lckless_stub.oldest = edge; - - const txnid_t last_oldest = lck->mti_oldest_reader; - mdbx_tassert(txn, edge >= last_oldest); - if (likely(last_oldest == edge)) - return edge; - - const uint32_t nothing_changed = MDBX_STRING_TETRAD("None"); - const uint32_t snap_readers_refresh_flag = lck->mti_readers_refresh_flag; - mdbx_jitter4testing(false); - if (snap_readers_refresh_flag == nothing_changed) - return last_oldest; - - txnid_t oldest = edge; - lck->mti_readers_refresh_flag = nothing_changed; - mdbx_flush_incoherent_cpu_writeback(); - const unsigned snap_nreaders = lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; ++i) { - if (lck->mti_readers[i].mr_pid) { - /* mdbx_jitter4testing(true); */ - const txnid_t snap = safe64_read(&lck->mti_readers[i].mr_txnid); - if (oldest > snap && last_oldest <= /* ignore pending updates */ snap) { - oldest = snap; - if (oldest == last_oldest) - return oldest; - } - } - } - - if (oldest != last_oldest) { - mdbx_notice("update oldest %" PRIaTXN " -> %" PRIaTXN, last_oldest, oldest); - mdbx_tassert(txn, oldest >= lck->mti_oldest_reader); - lck->mti_oldest_reader = oldest; - } - return oldest; -} - -/* Find largest mvcc-snapshot still referenced. */ -static __cold pgno_t mdbx_find_largest(MDBX_env *env, pgno_t largest) { - MDBX_lockinfo *const lck = env->me_lck; - if (likely(lck != NULL /* exclusive mode */)) { - const unsigned snap_nreaders = lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (lck->mti_readers[i].mr_pid) { - /* mdbx_jitter4testing(true); */ - const pgno_t snap_pages = lck->mti_readers[i].mr_snapshot_pages_used; - const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - mdbx_memory_barrier(); - if (unlikely(snap_pages != lck->mti_readers[i].mr_snapshot_pages_used || - snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) - goto retry; - if (largest < snap_pages && - lck->mti_oldest_reader <= /* ignore pending updates */ snap_txnid && - snap_txnid <= env->me_txn0->mt_txnid) - largest = snap_pages; - } - } - } - - return largest; -} - -/* Add a page to the txn's dirty list */ -static int __must_check_result mdbx_page_dirty(MDBX_txn *txn, MDBX_page *mp) { - mp->mp_txnid = INVALID_TXNID; - mp->mp_flags |= P_DIRTY; - const int rc = mdbx_dpl_append(txn->tw.dirtylist, mp->mp_pgno, mp); - if (unlikely(rc != MDBX_SUCCESS)) { - txn->mt_flags |= MDBX_TXN_ERROR; - return rc; - } - txn->tw.dirtyroom--; - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - return MDBX_SUCCESS; -} - -#if !(defined(_WIN32) || defined(_WIN64)) -static __always_inline __maybe_unused int ignore_enosys(int err) { -#ifdef ENOSYS - if (err == ENOSYS) - return MDBX_RESULT_TRUE; -#endif /* ENOSYS */ -#ifdef ENOIMPL - if (err == ENOIMPL) - return MDBX_RESULT_TRUE; -#endif /* ENOIMPL */ -#ifdef ENOTSUP - if (err == ENOTSUP) - return MDBX_RESULT_TRUE; -#endif /* ENOTSUP */ -#ifdef ENOSUPP - if (err == ENOSUPP) - return MDBX_RESULT_TRUE; -#endif /* ENOSUPP */ -#ifdef EOPNOTSUPP - if (err == EOPNOTSUPP) - return MDBX_RESULT_TRUE; -#endif /* EOPNOTSUPP */ - if (err == EAGAIN) - return MDBX_RESULT_TRUE; - return err; -} -#endif /* defined(_WIN32) || defined(_WIN64) */ - -/* Turn on/off readahead. It's harmful when the DB is larger than RAM. */ -static int __cold mdbx_set_readahead(MDBX_env *env, const size_t offset, - const size_t length, const bool enable) { - assert(length > 0); - mdbx_notice("readahead %s %u..%u", enable ? "ON" : "OFF", - bytes2pgno(env, offset), bytes2pgno(env, offset + length)); - -#if defined(F_RDAHEAD) - if (unlikely(fcntl(env->me_lazy_fd, F_RDAHEAD, enable) == -1)) - return errno; -#endif /* F_RDAHEAD */ - - if (enable) { -#if defined(F_RDADVISE) - struct radvisory hint; - hint.ra_offset = offset; - hint.ra_count = length; - (void)/* Ignore ENOTTY for DB on the ram-disk and so on */ fcntl( - env->me_lazy_fd, F_RDADVISE, &hint); -#endif /* F_RDADVISE */ -#if defined(MADV_WILLNEED) - int err = madvise(env->me_map + offset, length, MADV_WILLNEED) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#elif defined(POSIX_MADV_WILLNEED) - int err = ignore_enosys( - posix_madvise(env->me_map + offset, length, POSIX_MADV_WILLNEED)); - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#elif defined(_WIN32) || defined(_WIN64) - if (mdbx_PrefetchVirtualMemory) { - WIN32_MEMORY_RANGE_ENTRY hint; - hint.VirtualAddress = env->me_map + offset; - hint.NumberOfBytes = length; - (void)mdbx_PrefetchVirtualMemory(GetCurrentProcess(), 1, &hint, 0); - } -#elif defined(POSIX_FADV_WILLNEED) - int err = ignore_enosys( - posix_fadvise(env->me_lazy_fd, offset, length, POSIX_FADV_WILLNEED)); - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#endif /* MADV_WILLNEED */ - } else { -#if defined(MADV_RANDOM) - int err = madvise(env->me_map + offset, length, MADV_RANDOM) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#elif defined(POSIX_MADV_RANDOM) - int err = ignore_enosys( - posix_madvise(env->me_map + offset, length, POSIX_MADV_RANDOM)); - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#elif defined(POSIX_FADV_RANDOM) - int err = ignore_enosys( - posix_fadvise(env->me_lazy_fd, offset, length, POSIX_FADV_RANDOM)); - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#endif /* MADV_RANDOM */ - } - return MDBX_SUCCESS; -} - -static __cold int mdbx_mapresize(MDBX_env *env, const pgno_t used_pgno, - const pgno_t size_pgno, - const pgno_t limit_pgno) { - if ((env->me_flags & MDBX_WRITEMAP) && *env->me_unsynced_pages) { - int err = mdbx_msync(&env->me_dxb_mmap, 0, - pgno_align2os_bytes(env, used_pgno), true); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - - const size_t limit_bytes = pgno_align2os_bytes(env, limit_pgno); - const size_t size_bytes = pgno_align2os_bytes(env, size_pgno); - - mdbx_verbose("resize datafile/mapping: " - "present %" PRIuPTR " -> %" PRIuPTR ", " - "limit %" PRIuPTR " -> %" PRIuPTR, - env->me_dxb_mmap.current, size_bytes, env->me_dxb_mmap.limit, - limit_bytes); - - mdbx_assert(env, limit_bytes >= size_bytes); - mdbx_assert(env, bytes2pgno(env, size_bytes) >= size_pgno); - mdbx_assert(env, bytes2pgno(env, limit_bytes) >= limit_pgno); - const size_t prev_limit = env->me_dxb_mmap.limit; - const void *const prev_addr = env->me_map; - -#if defined(_WIN32) || defined(_WIN64) - /* Acquire guard in exclusive mode for: - * - to avoid collision between read and write txns around env->me_dbgeo; - * - to avoid attachment of new reading threads (see mdbx_rdt_lock); */ - mdbx_srwlock_AcquireExclusive(&env->me_remap_guard); - mdbx_handle_array_t *suspended = NULL; - mdbx_handle_array_t array_onstack; - int rc = MDBX_SUCCESS; - if (limit_bytes == env->me_dxb_mmap.limit && - size_bytes == env->me_dxb_mmap.current && - size_bytes == env->me_dxb_mmap.filesize) - goto bailout; - - /* 1) Windows allows only extending a read-write section, but not a - * corresponing mapped view. Therefore in other cases we must suspend - * the local threads for safe remap. - * 2) At least on Windows 10 1803 the entire mapped section is unavailable - * for short time during NtExtendSection() or VirtualAlloc() execution. - * 3) Under Wine runtime environment on Linux a section extending is not - * supported. Therefore thread suspending is always required. - * - * THEREFORE LOCAL THREADS SUSPENDING IS ALWAYS REQUIRED! */ - array_onstack.limit = ARRAY_LENGTH(array_onstack.handles); - array_onstack.count = 0; - suspended = &array_onstack; - rc = mdbx_suspend_threads_before_remap(env, &suspended); - if (rc != MDBX_SUCCESS) { - mdbx_error("failed suspend-for-remap: errcode %d", rc); - goto bailout; - } -#else - /* Acquire guard to avoid collision between read and write txns - * around env->me_dbgeo */ - int rc = mdbx_fastmutex_acquire(&env->me_remap_guard); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if (limit_bytes == env->me_dxb_mmap.limit && - size_bytes == env->me_dxb_mmap.current) - goto bailout; -#endif /* Windows */ - - const size_t prev_size = env->me_dxb_mmap.current; - if (size_bytes < prev_size) { - mdbx_notice("resize-MADV_%s %u..%u", - (env->me_flags & MDBX_WRITEMAP) ? "REMOVE" : "DONTNEED", - size_pgno, bytes2pgno(env, prev_size)); - rc = MDBX_RESULT_TRUE; -#if defined(MADV_REMOVE) - if (env->me_flags & MDBX_WRITEMAP) - rc = - madvise(env->me_map + size_bytes, prev_size - size_bytes, MADV_REMOVE) - ? ignore_enosys(errno) - : MDBX_SUCCESS; -#endif /* MADV_REMOVE */ -#if defined(MADV_DONTNEED) - if (rc == MDBX_RESULT_TRUE) - rc = madvise(env->me_map + size_bytes, prev_size - size_bytes, - MADV_DONTNEED) - ? ignore_enosys(errno) - : MDBX_SUCCESS; -#elif defined(POSIX_MADV_DONTNEED) - if (rc == MDBX_RESULT_TRUE) - rc = ignore_enosys(posix_madvise(env->me_map + size_bytes, - prev_size - size_bytes, - POSIX_MADV_DONTNEED)); -#elif defined(POSIX_FADV_DONTNEED) - if (rc == MDBX_RESULT_TRUE) - rc = ignore_enosys(posix_fadvise(env->me_lazy_fd, size_bytes, - prev_size - size_bytes, - POSIX_FADV_DONTNEED)); -#endif /* MADV_DONTNEED */ - if (unlikely(MDBX_IS_ERROR(rc))) - goto bailout; - if (*env->me_discarded_tail > size_pgno) - *env->me_discarded_tail = size_pgno; - } - - rc = mdbx_mresize(env->me_flags, &env->me_dxb_mmap, size_bytes, limit_bytes); - if (rc == MDBX_SUCCESS && (env->me_flags & MDBX_NORDAHEAD) == 0) { - const int readahead = mdbx_is_readahead_reasonable(size_bytes, 0); - if (readahead == MDBX_RESULT_FALSE) - rc = mdbx_set_readahead( - env, 0, (size_bytes > prev_size) ? size_bytes : prev_size, false); - else if (readahead == MDBX_RESULT_TRUE) { - const size_t readahead_pivot = - (limit_bytes != prev_limit || env->me_dxb_mmap.address != prev_addr -#if defined(_WIN32) || defined(_WIN64) - || prev_size > size_bytes -#endif /* Windows */ - ) - ? 0 /* reassign readahead to the entire map - because it was remapped */ - : prev_size; - if (size_bytes > readahead_pivot) { - *env->me_discarded_tail = size_pgno; - rc = mdbx_set_readahead(env, readahead_pivot, - size_bytes - readahead_pivot, true); - } - } - } - -bailout: - if (rc == MDBX_SUCCESS) { -#if defined(_WIN32) || defined(_WIN64) - mdbx_assert(env, size_bytes == env->me_dxb_mmap.current); - mdbx_assert(env, size_bytes <= env->me_dxb_mmap.filesize); - mdbx_assert(env, limit_bytes == env->me_dxb_mmap.limit); -#endif /* Windows */ -#ifdef MDBX_USE_VALGRIND - if (prev_limit != env->me_dxb_mmap.limit || prev_addr != env->me_map) { - VALGRIND_DISCARD(env->me_valgrind_handle); - env->me_valgrind_handle = 0; - if (env->me_dxb_mmap.limit) - env->me_valgrind_handle = - VALGRIND_CREATE_BLOCK(env->me_map, env->me_dxb_mmap.limit, "mdbx"); - } -#endif /* MDBX_USE_VALGRIND */ - } else { - if (rc != MDBX_UNABLE_EXTEND_MAPSIZE) { - mdbx_error("failed resize datafile/mapping: " - "present %" PRIuPTR " -> %" PRIuPTR ", " - "limit %" PRIuPTR " -> %" PRIuPTR ", errcode %d", - env->me_dxb_mmap.current, size_bytes, env->me_dxb_mmap.limit, - limit_bytes, rc); - } else { - mdbx_notice("unable resize datafile/mapping: " - "present %" PRIuPTR " -> %" PRIuPTR ", " - "limit %" PRIuPTR " -> %" PRIuPTR ", errcode %d", - env->me_dxb_mmap.current, size_bytes, env->me_dxb_mmap.limit, - limit_bytes, rc); - } - if (!env->me_dxb_mmap.address) { - env->me_flags |= MDBX_FATAL_ERROR; - if (env->me_txn) - env->me_txn->mt_flags |= MDBX_TXN_ERROR; - rc = MDBX_PANIC; - } - } - -#if defined(_WIN32) || defined(_WIN64) - int err = MDBX_SUCCESS; - mdbx_srwlock_ReleaseExclusive(&env->me_remap_guard); - if (suspended) { - err = mdbx_resume_threads_after_remap(suspended); - if (suspended != &array_onstack) - mdbx_free(suspended); - } -#else - int err = mdbx_fastmutex_release(&env->me_remap_guard); -#endif /* Windows */ - if (err != MDBX_SUCCESS) { - mdbx_fatal("failed resume-after-remap: errcode %d", err); - return MDBX_PANIC; - } - return rc; -} - -static int mdbx_meta_unsteady(MDBX_env *env, const txnid_t last_steady, - MDBX_meta *const meta) { - const uint64_t wipe = MDBX_DATASIGN_NONE; - if (META_IS_STEADY(meta) && - mdbx_meta_txnid_stable(env, meta) <= last_steady) { - mdbx_notice("wipe txn #%" PRIaTXN ", meta %" PRIaPGNO, last_steady, - data_page(meta)->mp_pgno); - if (env->me_flags & MDBX_WRITEMAP) - meta->mm_datasync_sign = wipe; - else - return mdbx_pwrite(env->me_lazy_fd, &wipe, sizeof(meta->mm_datasync_sign), - (uint8_t *)&meta->mm_datasync_sign - env->me_map); - } - return MDBX_SUCCESS; -} - -__cold static int mdbx_wipe_steady(MDBX_env *env, const txnid_t last_steady) { - int err = mdbx_meta_unsteady(env, last_steady, METAPAGE(env, 0)); - if (unlikely(err != MDBX_SUCCESS)) - return err; - err = mdbx_meta_unsteady(env, last_steady, METAPAGE(env, 1)); - if (unlikely(err != MDBX_SUCCESS)) - return err; - err = mdbx_meta_unsteady(env, last_steady, METAPAGE(env, 2)); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - if (env->me_flags & MDBX_WRITEMAP) { - mdbx_flush_incoherent_cpu_writeback(); - err = mdbx_msync(&env->me_dxb_mmap, 0, pgno_align2os_bytes(env, NUM_METAS), - false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } else { -#if (defined(__linux__) || defined(__gnu_linux__)) && !defined(MDBX_SAFE4QEMU) - if (sync_file_range(env->me_lazy_fd, 0, pgno2bytes(env, NUM_METAS), - SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_AFTER)) - err = errno; -#else - err = mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA); -#endif - if (unlikely(err != MDBX_SUCCESS)) - return err; - mdbx_flush_incoherent_mmap(env->me_map, pgno2bytes(env, NUM_METAS), - env->me_os_psize); - } - - if (likely(env->me_lck)) - /* force oldest refresh */ - env->me_lck->mti_readers_refresh_flag = true; - return MDBX_SUCCESS; -} - -/* Allocate page numbers and memory for writing. Maintain mt_last_reclaimed, - * mt_reclaimed_pglist and mt_next_pgno. Set MDBX_TXN_ERROR on failure. - * - * If there are free pages available from older transactions, they - * are re-used first. Otherwise allocate a new page at mt_next_pgno. - * Do not modify the GC, just merge GC records into mt_reclaimed_pglist - * and move mt_last_reclaimed to say which records were consumed. Only this - * function can create mt_reclaimed_pglist and move - * mt_last_reclaimed/mt_next_pgno. - * - * [in] mc cursor A cursor handle identifying the transaction and - * database for which we are allocating. - * [in] num the number of pages to allocate. - * [out] mp Address of the allocated page(s). Requests for multiple pages - * will always be satisfied by a single contiguous chunk of memory. - * - * Returns 0 on success, non-zero on failure.*/ - -#define MDBX_ALLOC_CACHE 1 -#define MDBX_ALLOC_GC 2 -#define MDBX_ALLOC_NEW 4 -#define MDBX_ALLOC_ALL (MDBX_ALLOC_CACHE | MDBX_ALLOC_GC | MDBX_ALLOC_NEW) - -__hot static int mdbx_page_alloc(MDBX_cursor *mc, const unsigned num, - MDBX_page **const mp, int flags) { - int rc; - MDBX_txn *txn = mc->mc_txn; - MDBX_env *env = txn->mt_env; - MDBX_page *np; - - if (likely(flags & MDBX_ALLOC_GC)) { - flags |= env->me_flags & (MDBX_COALESCE | MDBX_LIFORECLAIM); - if (unlikely(mc->mc_flags & C_RECLAIMING)) { - /* If mc is updating the GC, then the retired-list cannot play - * catch-up with itself by growing while trying to save it. */ - flags &= ~(MDBX_ALLOC_GC | MDBX_COALESCE | MDBX_LIFORECLAIM); - } else if (unlikely(txn->mt_dbs[FREE_DBI].md_entries == 0)) { - /* avoid (recursive) search inside empty tree and while tree is updating, - * https://github.com/erthink/libmdbx/issues/31 */ - flags &= ~MDBX_ALLOC_GC; - } - } - - if (likely(num == 1 && (flags & MDBX_ALLOC_CACHE) != 0)) { - /* If there are any loose pages, just use them */ - mdbx_assert(env, mp && num); - if (likely(txn->tw.loose_pages)) { - if (txn->tw.loose_refund_wl > txn->mt_next_pgno) { - mdbx_refund(txn); - if (unlikely(!txn->tw.loose_pages)) - goto skip_cache; - } - - np = txn->tw.loose_pages; - txn->tw.loose_pages = np->mp_next; - txn->tw.loose_count--; - mdbx_debug("db %d use loose page %" PRIaPGNO, DDBI(mc), np->mp_pgno); - mdbx_tassert(txn, np->mp_pgno < txn->mt_next_pgno); - mdbx_ensure(env, np->mp_pgno >= NUM_METAS); - VALGRIND_MAKE_MEM_UNDEFINED(page_data(np), page_space(txn->mt_env)); - ASAN_UNPOISON_MEMORY_REGION(page_data(np), page_space(txn->mt_env)); - np->mp_flags = P_DIRTY; - np->mp_txnid = INVALID_TXNID; - *mp = np; - return MDBX_SUCCESS; - } - } -skip_cache: - - mdbx_tassert( - txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); - pgno_t pgno, *re_list = txn->tw.reclaimed_pglist; - unsigned range_begin = 0, re_len = MDBX_PNL_SIZE(re_list); - txnid_t oldest = 0, last = 0; - const unsigned wanna_range = num - 1; - - while (true) { /* oom-kick retry loop */ - /* If our dirty list is already full, we can't do anything */ - if (unlikely(txn->tw.dirtyroom == 0)) { - rc = MDBX_TXN_FULL; - goto fail; - } - - MDBX_cursor recur; - for (MDBX_cursor_op op = MDBX_FIRST;; - op = (flags & MDBX_LIFORECLAIM) ? MDBX_PREV : MDBX_NEXT) { - MDBX_val key, data; - - /* Seek a big enough contiguous page range. - * Prefer pages with lower pgno. */ - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - if (likely(flags & MDBX_ALLOC_CACHE) && re_len > wanna_range && - (!(flags & MDBX_COALESCE) || op == MDBX_FIRST)) { - mdbx_tassert(txn, MDBX_PNL_LAST(re_list) < txn->mt_next_pgno && - MDBX_PNL_FIRST(re_list) < txn->mt_next_pgno); - range_begin = MDBX_PNL_ASCENDING ? 1 : re_len; - pgno = MDBX_PNL_LEAST(re_list); - if (likely(wanna_range == 0)) - goto done; -#if MDBX_PNL_ASCENDING - mdbx_tassert(txn, pgno == re_list[1] && range_begin == 1); - while (true) { - unsigned range_end = range_begin + wanna_range; - if (re_list[range_end] - pgno == wanna_range) - goto done; - if (range_end == re_len) - break; - pgno = re_list[++range_begin]; - } -#else - mdbx_tassert(txn, pgno == re_list[re_len] && range_begin == re_len); - while (true) { - if (re_list[range_begin - wanna_range] - pgno == wanna_range) - goto done; - if (range_begin == wanna_range) - break; - pgno = re_list[--range_begin]; - } -#endif /* MDBX_PNL sort-order */ - } - - if (op == MDBX_FIRST) { /* 1st iteration, setup cursor, etc */ - if (unlikely(!(flags & MDBX_ALLOC_GC))) - break /* reclaiming is prohibited for now */; - - /* Prepare to fetch more and coalesce */ - oldest = (flags & MDBX_LIFORECLAIM) ? mdbx_find_oldest(txn) - : *env->me_oldest; - rc = mdbx_cursor_init(&recur, txn, FREE_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - if (flags & MDBX_LIFORECLAIM) { - /* Begin from oldest reader if any */ - if (oldest > MIN_TXNID) { - last = oldest - 1; - op = MDBX_SET_RANGE; - } - } else if (txn->tw.last_reclaimed) { - /* Continue lookup from txn->tw.last_reclaimed to oldest reader */ - last = txn->tw.last_reclaimed; - op = MDBX_SET_RANGE; - } - - key.iov_base = &last; - key.iov_len = sizeof(last); - } - - if (!(flags & MDBX_LIFORECLAIM)) { - /* Do not try fetch more if the record will be too recent */ - if (op != MDBX_FIRST && ++last >= oldest) { - oldest = mdbx_find_oldest(txn); - if (oldest <= last) - break; - } - } - - rc = mdbx_cursor_get(&recur, &key, NULL, op); - if (rc == MDBX_NOTFOUND && (flags & MDBX_LIFORECLAIM)) { - if (op == MDBX_SET_RANGE) - continue; - txnid_t snap = mdbx_find_oldest(txn); - if (oldest < snap) { - oldest = snap; - last = oldest - 1; - key.iov_base = &last; - key.iov_len = sizeof(last); - op = MDBX_SET_RANGE; - rc = mdbx_cursor_get(&recur, &key, NULL, op); - } - } - if (unlikely(rc)) { - if (rc == MDBX_NOTFOUND) - break; - goto fail; - } - - if (unlikely(key.iov_len != sizeof(txnid_t))) { - rc = MDBX_CORRUPTED; - goto fail; - } - last = unaligned_peek_u64(4, key.iov_base); - if (unlikely(last < 1 || last >= SAFE64_INVALID_THRESHOLD)) { - rc = MDBX_CORRUPTED; - goto fail; - } - if (oldest <= last) { - oldest = mdbx_find_oldest(txn); - if (oldest <= last) { - if (flags & MDBX_LIFORECLAIM) - continue; - break; - } - } - - if (flags & MDBX_LIFORECLAIM) { - /* skip IDs of records that already reclaimed */ - if (txn->tw.lifo_reclaimed) { - size_t i; - for (i = (size_t)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed); i > 0; --i) - if (txn->tw.lifo_reclaimed[i] == last) - break; - if (i) - continue; - } - } - - /* Reading next GC record */ - np = recur.mc_pg[recur.mc_top]; - if (unlikely((rc = mdbx_node_read( - &recur, page_node(np, recur.mc_ki[recur.mc_top]), - &data)) != MDBX_SUCCESS)) - goto fail; - - if ((flags & MDBX_LIFORECLAIM) && !txn->tw.lifo_reclaimed) { - txn->tw.lifo_reclaimed = mdbx_txl_alloc(); - if (unlikely(!txn->tw.lifo_reclaimed)) { - rc = MDBX_ENOMEM; - goto fail; - } - } - - /* Append PNL from GC record to me_reclaimed_pglist */ - mdbx_cassert(mc, (mc->mc_flags & C_GCFREEZE) == 0); - pgno_t *gc_pnl = (pgno_t *)data.iov_base; - mdbx_tassert(txn, data.iov_len >= MDBX_PNL_SIZEOF(gc_pnl)); - if (unlikely(data.iov_len < MDBX_PNL_SIZEOF(gc_pnl) || - !mdbx_pnl_check(gc_pnl, txn->mt_next_pgno))) { - rc = MDBX_CORRUPTED; - goto fail; - } - const unsigned gc_len = MDBX_PNL_SIZE(gc_pnl); - rc = mdbx_pnl_need(&txn->tw.reclaimed_pglist, gc_len); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - re_list = txn->tw.reclaimed_pglist; - - /* Remember ID of GC record */ - if (flags & MDBX_LIFORECLAIM) { - rc = mdbx_txl_append(&txn->tw.lifo_reclaimed, last); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - txn->tw.last_reclaimed = last; - - if (mdbx_log_enabled(MDBX_LOG_EXTRA)) { - mdbx_debug_extra("PNL read txn %" PRIaTXN " root %" PRIaPGNO - " num %u, PNL", - last, txn->mt_dbs[FREE_DBI].md_root, gc_len); - unsigned i; - for (i = gc_len; i; i--) - mdbx_debug_extra_print(" %" PRIaPGNO, gc_pnl[i]); - mdbx_debug_extra_print("%s", "\n"); - } - - /* Merge in descending sorted order */ - const unsigned prev_re_len = MDBX_PNL_SIZE(re_list); - mdbx_pnl_xmerge(re_list, gc_pnl); - /* re-check to avoid duplicates */ - if (unlikely(!mdbx_pnl_check(re_list, txn->mt_next_pgno))) { - rc = MDBX_CORRUPTED; - goto fail; - } - - re_len = MDBX_PNL_SIZE(re_list); - mdbx_tassert(txn, re_len == 0 || re_list[re_len] < txn->mt_next_pgno); - if (re_len && unlikely(MDBX_PNL_MOST(re_list) == txn->mt_next_pgno - 1)) { - /* Refund suitable pages into "unallocated" space */ - mdbx_refund(txn); - re_list = txn->tw.reclaimed_pglist; - re_len = MDBX_PNL_SIZE(re_list); - } - - if (unlikely((flags & MDBX_ALLOC_CACHE) == 0)) { - /* Done for a kick-reclaim mode, actually no page needed */ - return MDBX_SUCCESS; - } - - /* Don't try to coalesce too much. */ - if (unlikely(re_len > MDBX_DPL_TXNFULL / 4)) - break; - if (re_len /* current size */ >= env->me_maxgc_ov1page || - (re_len > prev_re_len && re_len - prev_re_len /* delta from prev */ >= - env->me_maxgc_ov1page / 2)) - flags &= ~MDBX_COALESCE; - } - - if ((flags & (MDBX_COALESCE | MDBX_ALLOC_CACHE)) == MDBX_ALLOC_CACHE && - re_len > wanna_range) { - range_begin = MDBX_PNL_ASCENDING ? 1 : re_len; - pgno = MDBX_PNL_LEAST(re_list); - if (likely(wanna_range == 0)) - goto done; -#if MDBX_PNL_ASCENDING - mdbx_tassert(txn, pgno == re_list[1] && range_begin == 1); - while (true) { - unsigned range_end = range_begin + wanna_range; - if (re_list[range_end] - pgno == wanna_range) - goto done; - if (range_end == re_len) - break; - pgno = re_list[++range_begin]; - } -#else - mdbx_tassert(txn, pgno == re_list[re_len] && range_begin == re_len); - while (true) { - if (re_list[range_begin - wanna_range] - pgno == wanna_range) - goto done; - if (range_begin == wanna_range) - break; - pgno = re_list[--range_begin]; - } -#endif /* MDBX_PNL sort-order */ - } - - /* There is no suitable pages in the GC and to be able to allocate - * we should CHOICE one of: - * - make a new steady checkpoint if reclaiming was stopped by - * the last steady-sync, or wipe it in the MDBX_UTTERLY_NOSYNC mode; - * - kick lagging reader(s) if reclaiming was stopped by ones of it. - * - extend the database file. */ - - /* Will use new pages from the map if nothing is suitable in the GC. */ - range_begin = 0; - pgno = txn->mt_next_pgno; - const pgno_t next = pgno_add(pgno, num); - - if (flags & MDBX_ALLOC_GC) { - const MDBX_meta *const head = mdbx_meta_head(env); - MDBX_meta *const steady = mdbx_meta_steady(env); - /* does reclaiming stopped at the last steady point? */ - if (head != steady && META_IS_STEADY(steady) && - oldest == mdbx_meta_txnid_stable(env, steady)) { - mdbx_debug("gc-kick-steady: head %" PRIaTXN "-%s, tail %" PRIaTXN - "-%s, oldest %" PRIaTXN, - mdbx_meta_txnid_stable(env, head), mdbx_durable_str(head), - mdbx_meta_txnid_stable(env, steady), - mdbx_durable_str(steady), oldest); - rc = MDBX_RESULT_TRUE; - const pgno_t autosync_threshold = *env->me_autosync_threshold; - const uint64_t autosync_period = *env->me_autosync_period; - /* wipe the last steady-point if one of: - * - UTTERLY_NOSYNC mode AND auto-sync threshold is NOT specified - * - UTTERLY_NOSYNC mode AND free space at steady-point is exhausted - * otherwise, make a new steady-point if one of: - * - auto-sync threshold is specified and reached; - * - upper limit of database size is reached; - * - database is full (with the current file size) - * AND auto-sync threshold it NOT specified */ - if (F_ISSET(env->me_flags, MDBX_UTTERLY_NOSYNC) && - ((autosync_threshold | autosync_period) == 0 || - next >= steady->mm_geo.now)) { - /* wipe steady checkpoint in MDBX_UTTERLY_NOSYNC mode - * without any auto-sync treshold(s). */ - rc = mdbx_wipe_steady(env, oldest); - mdbx_debug("gc-wipe-steady, rc %d", rc); - mdbx_assert(env, steady != mdbx_meta_steady(env)); - } else if ((flags & MDBX_ALLOC_NEW) == 0 || - (autosync_threshold && - *env->me_unsynced_pages >= autosync_threshold) || - (autosync_period && - mdbx_osal_monotime() - *env->me_sync_timestamp >= - autosync_period) || - next >= txn->mt_geo.upper || - (next >= txn->mt_end_pgno && - (autosync_threshold | autosync_period) == 0)) { - /* make steady checkpoint. */ - MDBX_meta meta = *head; - rc = mdbx_sync_locked(env, env->me_flags & MDBX_WRITEMAP, &meta); - mdbx_debug("gc-make-steady, rc %d", rc); - mdbx_assert(env, steady != mdbx_meta_steady(env)); - } - if (rc == MDBX_SUCCESS) { - if (mdbx_find_oldest(txn) > oldest) - continue; - /* it is reasonable check/kick lagging reader(s) here, - * since we made a new steady point or wipe the last. */ - if (oldest < txn->mt_txnid - MDBX_TXNID_STEP && - mdbx_oomkick(env, oldest) > oldest) - continue; - } else if (unlikely(rc != MDBX_RESULT_TRUE)) - goto fail; - } - } - - /* don't kick lagging reader(s) if is enough unallocated space - * at the end of database file. */ - if ((flags & MDBX_ALLOC_NEW) && next <= txn->mt_end_pgno) - goto done; - if ((flags & MDBX_ALLOC_GC) && oldest < txn->mt_txnid - MDBX_TXNID_STEP && - mdbx_oomkick(env, oldest) > oldest) - continue; - - rc = MDBX_NOTFOUND; - if (flags & MDBX_ALLOC_NEW) { - rc = MDBX_MAP_FULL; - if (next <= txn->mt_geo.upper && txn->mt_geo.grow) { - mdbx_assert(env, next > txn->mt_end_pgno); - pgno_t aligned = pgno_align2os_pgno( - env, pgno_add(next, txn->mt_geo.grow - next % txn->mt_geo.grow)); - - if (aligned > txn->mt_geo.upper) - aligned = txn->mt_geo.upper; - mdbx_assert(env, aligned > txn->mt_end_pgno); - - mdbx_verbose("try growth datafile to %" PRIaPGNO " pages (+%" PRIaPGNO - ")", - aligned, aligned - txn->mt_end_pgno); - rc = mdbx_mapresize(env, txn->mt_next_pgno, aligned, txn->mt_geo.upper); - if (rc == MDBX_SUCCESS) { - env->me_txn->mt_end_pgno = aligned; - goto done; - } - - mdbx_error("unable growth datafile to %" PRIaPGNO " pages (+%" PRIaPGNO - "), errcode %d", - aligned, aligned - txn->mt_end_pgno, rc); - } else { - mdbx_debug("gc-alloc: next %u > upper %u", next, txn->mt_geo.upper); - } - } - - fail: - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - if (likely(mp)) { - *mp = nullptr; - txn->mt_flags |= MDBX_TXN_ERROR; - } - mdbx_assert(env, rc != MDBX_SUCCESS); - return rc; - } - -done: - if (unlikely(mp == nullptr)) - return MDBX_SUCCESS; - mdbx_ensure(env, pgno >= NUM_METAS); - if (env->me_flags & MDBX_WRITEMAP) { - np = pgno2page(env, pgno); - /* LY: reset no-access flag from mdbx_loose_page() */ - VALGRIND_MAKE_MEM_UNDEFINED(np, pgno2bytes(env, num)); - ASAN_UNPOISON_MEMORY_REGION(np, pgno2bytes(env, num)); - } else { - if (unlikely(!(np = mdbx_page_malloc(txn, num)))) { - rc = MDBX_ENOMEM; - goto fail; - } - } - - if (range_begin) { - mdbx_cassert(mc, (mc->mc_flags & C_GCFREEZE) == 0); - mdbx_tassert(txn, pgno < txn->mt_next_pgno); - mdbx_tassert(txn, pgno == re_list[range_begin]); - /* Cutoff allocated pages from me_reclaimed_pglist */ -#if MDBX_PNL_ASCENDING - for (unsigned i = range_begin + num; i <= re_len;) - re_list[range_begin++] = re_list[i++]; - MDBX_PNL_SIZE(re_list) = re_len = range_begin - 1; -#else - MDBX_PNL_SIZE(re_list) = re_len -= num; - for (unsigned i = range_begin - num; i < re_len;) - re_list[++i] = re_list[++range_begin]; -#endif - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - } else { - txn->mt_next_pgno = pgno + num; - mdbx_assert(env, txn->mt_next_pgno <= txn->mt_end_pgno); - } - - if (unlikely(env->me_flags & MDBX_PAGEPERTURB)) - memset(np, -1, pgno2bytes(env, num)); - VALGRIND_MAKE_MEM_UNDEFINED(np, pgno2bytes(env, num)); - - np->mp_pgno = pgno; - np->mp_leaf2_ksize = 0; - np->mp_flags = 0; - np->mp_pages = num; - rc = mdbx_page_dirty(txn, np); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - *mp = np; - - mdbx_tassert( - txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); - return MDBX_SUCCESS; -} - -/* Copy the used portions of a non-overflow page. */ -__hot static void mdbx_page_copy(MDBX_page *dst, MDBX_page *src, size_t psize) { - STATIC_ASSERT(UINT16_MAX > MAX_PAGESIZE - PAGEHDRSZ); - STATIC_ASSERT(MIN_PAGESIZE > PAGEHDRSZ + NODESIZE * 4); - if (!IS_LEAF2(src)) { - size_t upper = src->mp_upper, lower = src->mp_lower, unused = upper - lower; - - /* If page isn't full, just copy the used portion. Adjust - * alignment so memcpy may copy words instead of bytes. */ - if (unused >= MDBX_CACHELINE_SIZE * 2) { - lower = roundup_powerof2(lower + PAGEHDRSZ, sizeof(void *)); - upper = (upper + PAGEHDRSZ) & ~(sizeof(void *) - 1); - memcpy(dst, src, lower); - dst = (void *)((char *)dst + upper); - src = (void *)((char *)src + upper); - psize -= upper; - } - } - memcpy(dst, src, psize); -} - -/* Pull a page off the txn's spill list, if present. - * - * If a page being referenced was spilled to disk in this txn, bring - * it back and make it dirty/writable again. - * - * [in] txn the transaction handle. - * [in] mp the page being referenced. It must not be dirty. - * [out] ret the writable page, if any. - * ret is unchanged if mp wasn't spilled. */ -static int __must_check_result mdbx_page_unspill(MDBX_txn *txn, MDBX_page *mp, - MDBX_page **ret) { - MDBX_env *env = txn->mt_env; - pgno_t pgno = mp->mp_pgno, pn = pgno << 1; - - for (const MDBX_txn *tx2 = txn; tx2; tx2 = tx2->mt_parent) { - if (!tx2->tw.spill_pages) - continue; - unsigned i = mdbx_pnl_exist(tx2->tw.spill_pages, pn); - if (!i) - continue; - if (txn->tw.dirtyroom == 0) - return MDBX_TXN_FULL; - unsigned num = IS_OVERFLOW(mp) ? mp->mp_pages : 1; - MDBX_page *np = mp; - if ((env->me_flags & MDBX_WRITEMAP) == 0) { - np = mdbx_page_malloc(txn, num); - if (unlikely(!np)) - return MDBX_ENOMEM; - if (unlikely(num > 1)) - memcpy(np, mp, pgno2bytes(env, num)); - else - mdbx_page_copy(np, mp, env->me_psize); - } - mdbx_debug("unspill page %" PRIaPGNO, mp->mp_pgno); - if (tx2 == txn) { - /* If in current txn, this page is no longer spilled. - * If it happens to be the last page, truncate the spill list. - * Otherwise mark it as deleted by setting the LSB. */ - txn->tw.spill_pages[i] |= 1; - if (i == MDBX_PNL_SIZE(txn->tw.spill_pages)) - MDBX_PNL_SIZE(txn->tw.spill_pages) -= 1; - } /* otherwise, if belonging to a parent txn, the - * page remains spilled until child commits */ - - int rc = mdbx_page_dirty(txn, np); - if (likely(rc == MDBX_SUCCESS)) - *ret = np; - return rc; - } - return MDBX_SUCCESS; -} - -/* Touch a page: make it dirty and re-insert into tree with updated pgno. - * Set MDBX_TXN_ERROR on failure. - * - * [in] mc cursor pointing to the page to be touched - * - * Returns 0 on success, non-zero on failure. */ -__hot static int mdbx_page_touch(MDBX_cursor *mc) { - MDBX_page *mp = mc->mc_pg[mc->mc_top], *np; - MDBX_txn *txn = mc->mc_txn; - MDBX_cursor *m2, *m3; - pgno_t pgno; - int rc; - - mdbx_cassert(mc, !IS_OVERFLOW(mp)); - if (!F_ISSET(mp->mp_flags, P_DIRTY)) { - if (txn->mt_flags & MDBX_TXN_SPILLS) { - np = NULL; - rc = mdbx_page_unspill(txn, mp, &np); - if (unlikely(rc)) - goto fail; - if (likely(np)) - goto done; - } - - if (unlikely((rc = mdbx_pnl_need(&txn->tw.retired_pages, 1)) || - (rc = mdbx_page_alloc(mc, 1, &np, MDBX_ALLOC_ALL)))) - goto fail; - pgno = np->mp_pgno; - mdbx_debug("touched db %d page %" PRIaPGNO " -> %" PRIaPGNO, DDBI(mc), - mp->mp_pgno, pgno); - mdbx_cassert(mc, mp->mp_pgno != pgno); - mdbx_pnl_xappend(txn->tw.retired_pages, mp->mp_pgno); - mdbx_tassert(txn, mdbx_dpl_find(txn->tw.dirtylist, mp->mp_pgno) == nullptr); - /* Update the parent page, if any, to point to the new page */ - if (mc->mc_top) { - MDBX_page *parent = mc->mc_pg[mc->mc_top - 1]; - MDBX_node *node = page_node(parent, mc->mc_ki[mc->mc_top - 1]); - node_set_pgno(node, pgno); - } else { - mc->mc_db->md_root = pgno; - } - } else if (txn->mt_parent && !IS_SUBP(mp)) { - mdbx_tassert(txn, (txn->mt_env->me_flags & MDBX_WRITEMAP) == 0); - pgno = mp->mp_pgno; - /* If txn has a parent, make sure the page is in our dirty list. */ - const MDBX_page *const dp = mdbx_dpl_find(txn->tw.dirtylist, pgno); - if (dp) { - if (unlikely(mp != dp)) { /* bad cursor? */ - mdbx_error("wrong page 0x%p #%" PRIaPGNO - " in the dirtylist, expecting %p", - __Wpedantic_format_voidptr(dp), pgno, - __Wpedantic_format_voidptr(mp)); - mc->mc_flags &= ~(C_INITIALIZED | C_EOF); - rc = MDBX_PROBLEM; - goto fail; - } - return MDBX_SUCCESS; - } - - mdbx_debug("clone db %d page %" PRIaPGNO, DDBI(mc), mp->mp_pgno); - mdbx_cassert(mc, txn->tw.dirtylist->length <= MDBX_DPL_TXNFULL); - /* No - copy it */ - np = mdbx_page_malloc(txn, 1); - if (unlikely(!np)) { - rc = MDBX_ENOMEM; - goto fail; - } - rc = mdbx_dpl_append(txn->tw.dirtylist, pgno, np); - if (unlikely(rc)) { - mdbx_dpage_free(txn->mt_env, np, 1); - goto fail; - } - } else { - return MDBX_SUCCESS; - } - - mdbx_page_copy(np, mp, txn->mt_env->me_psize); - np->mp_pgno = pgno; - np->mp_txnid = INVALID_TXNID; - np->mp_flags |= P_DIRTY; - -done: - /* Adjust cursors pointing to mp */ - mc->mc_pg[mc->mc_top] = np; - m2 = txn->mt_cursors[mc->mc_dbi]; - if (mc->mc_flags & C_SUB) { - for (; m2; m2 = m2->mc_next) { - m3 = &m2->mc_xcursor->mx_cursor; - if (m3->mc_snum < mc->mc_snum) - continue; - if (m3->mc_pg[mc->mc_top] == mp) - m3->mc_pg[mc->mc_top] = np; - } - } else { - for (; m2; m2 = m2->mc_next) { - if (m2->mc_snum < mc->mc_snum) - continue; - if (m2 == mc) - continue; - if (m2->mc_pg[mc->mc_top] == mp) { - m2->mc_pg[mc->mc_top] = np; - if (XCURSOR_INITED(m2) && IS_LEAF(np)) - XCURSOR_REFRESH(m2, np, m2->mc_ki[mc->mc_top]); - } - } - } - return MDBX_SUCCESS; - -fail: - txn->mt_flags |= MDBX_TXN_ERROR; - return rc; -} - -__cold int mdbx_env_sync_ex(MDBX_env *env, int force, int nonblock) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_TXN_CHECKPID */ - - unsigned flags = env->me_flags & ~MDBX_NOMETASYNC; - if (unlikely(flags & (MDBX_RDONLY | MDBX_FATAL_ERROR))) - return MDBX_EACCESS; - - if (unlikely(!env->me_map)) - return MDBX_EPERM; - - int rc = MDBX_RESULT_TRUE /* means "nothing to sync" */; - bool need_unlock = false; - if (nonblock && *env->me_unsynced_pages == 0) - goto fastpath; - - const bool outside_txn = (env->me_txn0->mt_owner != mdbx_thread_self()); - if (outside_txn) { - int err = mdbx_txn_lock(env, nonblock); - if (unlikely(err != MDBX_SUCCESS)) - return err; - need_unlock = true; - } - - const MDBX_meta *head = mdbx_meta_head(env); - pgno_t unsynced_pages = *env->me_unsynced_pages; - if (!META_IS_STEADY(head) || unsynced_pages) { - const pgno_t autosync_threshold = *env->me_autosync_threshold; - const uint64_t autosync_period = *env->me_autosync_period; - if (force || (autosync_threshold && unsynced_pages >= autosync_threshold) || - (autosync_period && - mdbx_osal_monotime() - *env->me_sync_timestamp >= autosync_period)) - flags &= MDBX_WRITEMAP /* clear flags for full steady sync */; - - if (outside_txn) { - if (unsynced_pages > /* FIXME: define threshold */ 16 && - (flags & (MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) == 0) { - mdbx_assert(env, ((flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); - const size_t usedbytes = pgno_align2os_bytes(env, head->mm_geo.next); - - mdbx_txn_unlock(env); - - /* LY: pre-sync without holding lock to reduce latency for writer(s) */ - int err = (flags & MDBX_WRITEMAP) - ? mdbx_msync(&env->me_dxb_mmap, 0, usedbytes, false) - : mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - err = mdbx_txn_lock(env, nonblock); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - /* LY: head and unsynced_pages may be changed. */ - head = mdbx_meta_head(env); - unsynced_pages = *env->me_unsynced_pages; - } - env->me_txn0->mt_txnid = meta_txnid(env, head, false); - mdbx_find_oldest(env->me_txn0); - rc = MDBX_RESULT_FALSE /* means "some data was synced" */; - } - - if (!META_IS_STEADY(head) || - ((flags & (MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) == 0 && unsynced_pages)) { - mdbx_debug("meta-head %" PRIaPGNO ", %s, sync_pending %" PRIaPGNO, - data_page(head)->mp_pgno, mdbx_durable_str(head), - unsynced_pages); - MDBX_meta meta = *head; - int err = mdbx_sync_locked(env, flags | MDBX_SHRINK_ALLOWED, &meta); - if (unlikely(err != MDBX_SUCCESS)) { - if (need_unlock) - mdbx_txn_unlock(env); - return err; - } - rc = MDBX_RESULT_FALSE /* means "some data was synced" */; - } - } - -fastpath: - /* LY: sync meta-pages if MDBX_NOMETASYNC enabled - * and someone was not synced above. */ - if (rc == MDBX_RESULT_TRUE && (env->me_flags & MDBX_NOMETASYNC) != 0) { - const txnid_t head_txnid = mdbx_recent_committed_txnid(env); - if (*env->me_meta_sync_txnid != (uint32_t)head_txnid) { - rc = - (flags & MDBX_WRITEMAP) - ? mdbx_msync(&env->me_dxb_mmap, 0, - pgno_align2os_bytes(env, NUM_METAS), false) - : mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - if (likely(rc == MDBX_SUCCESS)) - *env->me_meta_sync_txnid = (uint32_t)head_txnid; - } - } - if (need_unlock) - mdbx_txn_unlock(env); - return rc; -} - -__cold int mdbx_env_sync(MDBX_env *env) { - return mdbx_env_sync_ex(env, true, false); -} - -__cold int mdbx_env_sync_poll(MDBX_env *env) { - return mdbx_env_sync_ex(env, false, true); -} - -/* Back up parent txn's cursors, then grab the originals for tracking */ -static int mdbx_cursor_shadow(MDBX_txn *src, MDBX_txn *dst) { - MDBX_cursor *mc, *bk; - MDBX_xcursor *mx; - - for (int i = src->mt_numdbs; --i >= 0;) { - dst->mt_cursors[i] = NULL; - if ((mc = src->mt_cursors[i]) != NULL) { - size_t size = sizeof(MDBX_cursor); - if (mc->mc_xcursor) - size += sizeof(MDBX_xcursor); - for (; mc; mc = bk->mc_next) { - bk = mdbx_malloc(size); - if (unlikely(!bk)) - return MDBX_ENOMEM; - *bk = *mc; - mc->mc_backup = bk; - mc->mc_db = &dst->mt_dbs[i]; - /* Kill pointers into src to reduce abuse: The - * user may not use mc until dst ends. But we need a valid - * txn pointer here for cursor fixups to keep working. */ - mc->mc_txn = dst; - mc->mc_dbflag = &dst->mt_dbflags[i]; - if ((mx = mc->mc_xcursor) != NULL) { - *(MDBX_xcursor *)(bk + 1) = *mx; - mx->mx_cursor.mc_txn = dst; - } - mc->mc_next = dst->mt_cursors[i]; - dst->mt_cursors[i] = mc; - } - } - } - return MDBX_SUCCESS; -} - -/* Close this write txn's cursors, give parent txn's cursors back to parent. - * - * [in] txn the transaction handle. - * [in] merge true to keep changes to parent cursors, false to revert. - * - * Returns 0 on success, non-zero on failure. */ -static void mdbx_cursors_eot(MDBX_txn *txn, unsigned merge) { - MDBX_cursor **cursors = txn->mt_cursors, *mc, *next, *bk; - MDBX_xcursor *mx; - int i; - - for (i = txn->mt_numdbs; --i >= 0;) { - for (mc = cursors[i]; mc; mc = next) { - unsigned stage = mc->mc_signature; - mdbx_ensure(txn->mt_env, - stage == MDBX_MC_SIGNATURE || stage == MDBX_MC_WAIT4EOT); - next = mc->mc_next; - mdbx_tassert(txn, !next || next->mc_signature == MDBX_MC_SIGNATURE || - next->mc_signature == MDBX_MC_WAIT4EOT); - if ((bk = mc->mc_backup) != NULL) { - if (merge) { - /* Commit changes to parent txn */ - mc->mc_next = bk->mc_next; - mc->mc_backup = bk->mc_backup; - mc->mc_txn = bk->mc_txn; - mc->mc_db = bk->mc_db; - mc->mc_dbflag = bk->mc_dbflag; - if ((mx = mc->mc_xcursor) != NULL) - mx->mx_cursor.mc_txn = bk->mc_txn; - } else { - /* Abort nested txn */ - *mc = *bk; - if ((mx = mc->mc_xcursor) != NULL) - *mx = *(MDBX_xcursor *)(bk + 1); - } - bk->mc_signature = 0; - mdbx_free(bk); - } - if (stage == MDBX_MC_WAIT4EOT) { - mc->mc_signature = 0; - mdbx_free(mc); - } else { - mc->mc_signature = MDBX_MC_READY4CLOSE; - mc->mc_flags = 0 /* reset C_UNTRACK */; - } - } - cursors[i] = NULL; - } -} - -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) -/* Find largest mvcc-snapshot still referenced by this process. */ -static pgno_t mdbx_find_largest_this(MDBX_env *env, pgno_t largest) { - MDBX_lockinfo *const lck = env->me_lck; - if (likely(lck != NULL /* exclusive mode */)) { - const unsigned snap_nreaders = lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (lck->mti_readers[i].mr_pid == env->me_pid) { - /* mdbx_jitter4testing(true); */ - const pgno_t snap_pages = lck->mti_readers[i].mr_snapshot_pages_used; - const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - mdbx_memory_barrier(); - if (unlikely(snap_pages != lck->mti_readers[i].mr_snapshot_pages_used || - snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) - goto retry; - if (largest < snap_pages && - lck->mti_oldest_reader <= /* ignore pending updates */ snap_txnid && - snap_txnid < SAFE64_INVALID_THRESHOLD) - largest = snap_pages; - } - } - } - return largest; -} - -static void mdbx_txn_valgrind(MDBX_env *env, MDBX_txn *txn) { -#if !defined(__SANITIZE_ADDRESS__) - if (!RUNNING_ON_VALGRIND) - return; -#endif - - if (txn) { /* transaction start */ - if (env->me_poison_edge < txn->mt_next_pgno) - env->me_poison_edge = txn->mt_next_pgno; - VALGRIND_MAKE_MEM_DEFINED(env->me_map, pgno2bytes(env, txn->mt_next_pgno)); - ASAN_UNPOISON_MEMORY_REGION(env->me_map, - pgno2bytes(env, txn->mt_next_pgno)); - /* don't touch more, it should be already poisoned */ - } else { /* transaction end */ - bool should_unlock = false; - pgno_t last = MAX_PAGENO; - if (env->me_txn0 && env->me_txn0->mt_owner == mdbx_thread_self()) { - /* inside write-txn */ - MDBX_meta *head = mdbx_meta_head(env); - last = head->mm_geo.next; - } else if (mdbx_txn_lock(env, true) == MDBX_SUCCESS) { - /* no write-txn */ - last = NUM_METAS; - should_unlock = true; - } else { - /* write txn is running, therefore shouldn't poison any memory range */ - return; - } - - last = mdbx_find_largest_this(env, last); - const pgno_t edge = env->me_poison_edge; - if (edge > last) { - mdbx_assert(env, last >= NUM_METAS); - env->me_poison_edge = last; - VALGRIND_MAKE_MEM_NOACCESS(env->me_map + pgno2bytes(env, last), - pgno2bytes(env, edge - last)); - ASAN_POISON_MEMORY_REGION(env->me_map + pgno2bytes(env, last), - pgno2bytes(env, edge - last)); - } - if (should_unlock) - mdbx_txn_unlock(env); - } -} -#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ - -/* Common code for mdbx_txn_begin() and mdbx_txn_renew(). */ -static int mdbx_txn_renew0(MDBX_txn *txn, unsigned flags) { - MDBX_env *env = txn->mt_env; - int rc; - -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_TXN_CHECKPID */ - - STATIC_ASSERT(sizeof(MDBX_reader) == 32); -#if MDBX_LOCKING > 0 - STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_wlock) % MDBX_CACHELINE_SIZE == 0); - STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_rlock) % MDBX_CACHELINE_SIZE == 0); -#else - STATIC_ASSERT( - offsetof(MDBX_lockinfo, mti_oldest_reader) % MDBX_CACHELINE_SIZE == 0); - STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_numreaders) % MDBX_CACHELINE_SIZE == - 0); -#endif /* MDBX_LOCKING */ - STATIC_ASSERT(offsetof(MDBX_lockinfo, mti_readers) % MDBX_CACHELINE_SIZE == - 0); - - mdbx_assert(env, (flags & ~(MDBX_TXN_BEGIN_FLAGS | MDBX_TXN_SPILLS | - MDBX_WRITEMAP)) == 0); - const size_t tid = mdbx_thread_self(); - if (flags & MDBX_RDONLY) { - txn->mt_flags = - MDBX_RDONLY | (env->me_flags & (MDBX_NOTLS | MDBX_WRITEMAP)); - MDBX_reader *r = txn->to.reader; - STATIC_ASSERT(sizeof(size_t) == sizeof(r->mr_tid)); - if (likely(env->me_flags & MDBX_ENV_TXKEY)) { - mdbx_assert(env, !(env->me_flags & MDBX_NOTLS)); - r = thread_rthc_get(env->me_txkey); - if (likely(r)) { - mdbx_assert(env, r->mr_pid == env->me_pid); - mdbx_assert(env, r->mr_tid == mdbx_thread_self()); - } - } else { - mdbx_assert(env, !env->me_lck || (env->me_flags & MDBX_NOTLS)); - } - - if (likely(r)) { - if (unlikely(r->mr_pid != env->me_pid || - r->mr_txnid.inconsistent < SAFE64_INVALID_THRESHOLD)) - return MDBX_BAD_RSLOT; - } else if (env->me_lck) { - unsigned slot, nreaders; - mdbx_assert(env, env->me_lck->mti_magic_and_version == MDBX_LOCK_MAGIC); - mdbx_assert(env, env->me_lck->mti_os_and_format == MDBX_LOCK_FORMAT); - - rc = mdbx_rdt_lock(env); - if (unlikely(MDBX_IS_ERROR(rc))) - return rc; - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { - mdbx_rdt_unlock(env); - return MDBX_PANIC; - } -#if defined(_WIN32) || defined(_WIN64) - if (unlikely(!env->me_map)) { - mdbx_rdt_unlock(env); - return MDBX_EPERM; - } -#endif /* Windows */ - rc = MDBX_SUCCESS; - - if (unlikely(env->me_live_reader != env->me_pid)) { - rc = mdbx_rpid_set(env); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_rdt_unlock(env); - return rc; - } - env->me_live_reader = env->me_pid; - } - - while (1) { - nreaders = env->me_lck->mti_numreaders; - for (slot = 0; slot < nreaders; slot++) - if (env->me_lck->mti_readers[slot].mr_pid == 0) - break; - - if (likely(slot < env->me_maxreaders)) - break; - - rc = mdbx_reader_check0(env, true, NULL); - if (rc != MDBX_RESULT_TRUE) { - mdbx_rdt_unlock(env); - return (rc == MDBX_SUCCESS) ? MDBX_READERS_FULL : rc; - } - } - - r = &env->me_lck->mti_readers[slot]; - /* Claim the reader slot, carefully since other code - * uses the reader table un-mutexed: First reset the - * slot, next publish it in lck->mti_numreaders. After - * that, it is safe for mdbx_env_close() to touch it. - * When it will be closed, we can finally claim it. */ - r->mr_pid = 0; - safe64_reset(&r->mr_txnid, true); - if (slot == nreaders) - env->me_lck->mti_numreaders = ++nreaders; - r->mr_tid = (env->me_flags & MDBX_NOTLS) ? 0 : tid; - r->mr_pid = env->me_pid; - mdbx_rdt_unlock(env); - - if (likely(env->me_flags & MDBX_ENV_TXKEY)) { - mdbx_assert(env, env->me_live_reader == env->me_pid); - thread_rthc_set(env->me_txkey, r); - } - } - - while (1) { - MDBX_meta *const meta = mdbx_meta_head(env); - mdbx_jitter4testing(false); - const txnid_t snap = mdbx_meta_txnid_fluid(env, meta); - mdbx_jitter4testing(false); - if (likely(r)) { - safe64_reset(&r->mr_txnid, false); - r->mr_snapshot_pages_used = meta->mm_geo.next; - r->mr_snapshot_pages_retired = meta->mm_pages_retired; - safe64_write(&r->mr_txnid, snap); - mdbx_jitter4testing(false); - mdbx_assert(env, r->mr_pid == mdbx_getpid()); - mdbx_assert( - env, r->mr_tid == - ((env->me_flags & MDBX_NOTLS) ? 0 : mdbx_thread_self())); - mdbx_assert(env, r->mr_txnid.inconsistent == snap); - mdbx_compiler_barrier(); - env->me_lck->mti_readers_refresh_flag = true; - mdbx_flush_incoherent_cpu_writeback(); - } - mdbx_jitter4testing(true); - - /* Snap the state from current meta-head */ - txn->mt_txnid = snap; - txn->mt_geo = meta->mm_geo; - memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDBX_db)); - txn->mt_canary = meta->mm_canary; - - /* LY: Retry on a race, ITS#7970. */ - mdbx_compiler_barrier(); - if (likely(meta == mdbx_meta_head(env) && - snap == mdbx_meta_txnid_fluid(env, meta) && - snap >= *env->me_oldest)) { - mdbx_jitter4testing(false); - break; - } - } - - if (unlikely(txn->mt_txnid == 0 || - txn->mt_txnid >= SAFE64_INVALID_THRESHOLD)) { - mdbx_error("%s", "environment corrupted by died writer, must shutdown!"); - rc = MDBX_CORRUPTED; - goto bailout; - } - mdbx_assert(env, txn->mt_txnid >= *env->me_oldest); - txn->to.reader = r; - txn->mt_dbxs = env->me_dbxs; /* mostly static anyway */ - mdbx_ensure(env, txn->mt_txnid >= - /* paranoia is appropriate here */ *env->me_oldest); - txn->mt_numdbs = env->me_numdbs; - } else { - if (unlikely(txn->mt_owner == tid)) - return MDBX_BUSY; - MDBX_lockinfo *const lck = env->me_lck; - if (lck && (env->me_flags & MDBX_NOTLS) == 0 && - (mdbx_runtime_flags & MDBX_DBG_LEGACY_OVERLAP) == 0) { - const unsigned snap_nreaders = lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; ++i) { - if (lck->mti_readers[i].mr_pid == env->me_pid && - unlikely(lck->mti_readers[i].mr_tid == tid)) { - const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - if (txnid >= MIN_TXNID && txnid < SAFE64_INVALID_THRESHOLD) - return MDBX_TXN_OVERLAPPING; - } - } - } - - /* Not yet touching txn == env->me_txn0, it may be active */ - mdbx_jitter4testing(false); - rc = mdbx_txn_lock(env, F_ISSET(flags, MDBX_TRYTXN)); - if (unlikely(rc)) - return rc; - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { - mdbx_txn_unlock(env); - return MDBX_PANIC; - } -#if defined(_WIN32) || defined(_WIN64) - if (unlikely(!env->me_map)) { - mdbx_txn_unlock(env); - return MDBX_EPERM; - } -#endif /* Windows */ - - mdbx_jitter4testing(false); - MDBX_meta *meta = mdbx_meta_head(env); - mdbx_jitter4testing(false); - txn->mt_canary = meta->mm_canary; - const txnid_t snap = mdbx_meta_txnid_stable(env, meta); - txn->mt_txnid = safe64_txnid_next(snap); - if (unlikely(txn->mt_txnid >= SAFE64_INVALID_THRESHOLD)) { - mdbx_debug("%s", "txnid overflow!"); - rc = MDBX_TXN_FULL; - goto bailout; - } - - txn->mt_flags = flags; - txn->mt_child = NULL; - txn->tw.loose_pages = NULL; - txn->tw.loose_count = 0; - txn->tw.dirtyroom = MDBX_DPL_TXNFULL; - txn->tw.dirtylist = env->me_dirtylist; - mdbx_dpl_clear(txn->tw.dirtylist); - MDBX_PNL_SIZE(txn->tw.retired_pages) = 0; - txn->tw.spill_pages = NULL; - txn->tw.last_reclaimed = 0; - if (txn->tw.lifo_reclaimed) - MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) = 0; - env->me_txn = txn; - txn->mt_numdbs = env->me_numdbs; - memcpy(txn->mt_dbiseqs, env->me_dbiseqs, txn->mt_numdbs * sizeof(unsigned)); - /* Copy the DB info and flags */ - memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDBX_db)); - /* Moved to here to avoid a data race in read TXNs */ - txn->mt_geo = meta->mm_geo; - txn->tw.loose_refund_wl = txn->mt_next_pgno; - } - - /* Setup db info */ - mdbx_compiler_barrier(); - for (unsigned i = CORE_DBS; i < txn->mt_numdbs; i++) { - unsigned x = env->me_dbflags[i]; - txn->mt_dbs[i].md_flags = x & PERSISTENT_FLAGS; - txn->mt_dbflags[i] = - (x & MDBX_VALID) ? DB_VALID | DB_USRVALID | DB_STALE : 0; - } - txn->mt_dbflags[MAIN_DBI] = DB_VALID | DB_USRVALID; - txn->mt_dbflags[FREE_DBI] = DB_VALID; - - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { - mdbx_warning("%s", "environment had fatal error, must shutdown!"); - rc = MDBX_PANIC; - } else { - const size_t size = pgno2bytes(env, txn->mt_end_pgno); - if (unlikely(size > env->me_dxb_mmap.limit)) { - if (txn->mt_geo.upper > MAX_PAGENO || - bytes2pgno(env, pgno2bytes(env, txn->mt_geo.upper)) != - txn->mt_geo.upper) { - rc = MDBX_UNABLE_EXTEND_MAPSIZE; - goto bailout; - } - rc = mdbx_mapresize(env, txn->mt_next_pgno, txn->mt_end_pgno, - txn->mt_geo.upper); - if (rc != MDBX_SUCCESS) - goto bailout; - } - if (txn->mt_flags & MDBX_RDONLY) { -#if defined(_WIN32) || defined(_WIN64) - if ((size > env->me_dbgeo.lower && env->me_dbgeo.shrink) || - (mdbx_RunningUnderWine() && - /* under Wine acquisition of remap_guard is always required, - * since Wine don't support section extending, - * i.e. in both cases unmap+map are required. */ - size < env->me_dbgeo.upper && env->me_dbgeo.grow)) { - txn->mt_flags |= MDBX_SHRINK_ALLOWED; - mdbx_srwlock_AcquireShared(&env->me_remap_guard); - } -#endif /* Windows */ - } else { - env->me_dxb_mmap.current = size; -#if defined(_WIN32) || defined(_WIN64) - env->me_dxb_mmap.filesize = - (env->me_dxb_mmap.filesize < size) ? size : env->me_dxb_mmap.filesize; -#endif /* Windows */ - } -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - mdbx_txn_valgrind(env, txn); -#endif - txn->mt_owner = tid; - return MDBX_SUCCESS; - } -bailout: - mdbx_tassert(txn, rc != MDBX_SUCCESS); - mdbx_txn_end(txn, MDBX_END_SLOT | MDBX_END_FAIL_BEGIN); - return rc; -} - -static __always_inline int check_txn(const MDBX_txn *txn, int bad_bits) { - if (unlikely(!txn)) - return MDBX_EINVAL; - - if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(txn->mt_flags & bad_bits)) - return MDBX_BAD_TXN; - -#if MDBX_TXN_CHECKOWNER - if ((txn->mt_flags & MDBX_NOTLS) == 0 && - unlikely(txn->mt_owner != mdbx_thread_self())) - return txn->mt_owner ? MDBX_THREAD_MISMATCH : MDBX_BAD_TXN; -#endif /* MDBX_TXN_CHECKOWNER */ - - return MDBX_SUCCESS; -} - -static __always_inline int check_txn_rw(const MDBX_txn *txn, int bad_bits) { - if (unlikely(!txn)) - return MDBX_EINVAL; - - if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(txn->mt_flags & bad_bits)) - return MDBX_BAD_TXN; - - if (unlikely(F_ISSET(txn->mt_flags, MDBX_RDONLY))) - return MDBX_EACCESS; - -#if MDBX_TXN_CHECKOWNER - if (unlikely(txn->mt_owner != mdbx_thread_self())) - return txn->mt_owner ? MDBX_THREAD_MISMATCH : MDBX_BAD_TXN; -#endif /* MDBX_TXN_CHECKOWNER */ - - return MDBX_SUCCESS; -} - -int mdbx_txn_renew(MDBX_txn *txn) { - int rc; - - if (unlikely(!txn)) - return MDBX_EINVAL; - - if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0)) - return MDBX_EINVAL; - - if (unlikely(txn->mt_owner != 0)) - return MDBX_THREAD_MISMATCH; - - rc = mdbx_txn_renew0(txn, MDBX_RDONLY); - if (rc == MDBX_SUCCESS) { - txn->mt_owner = mdbx_thread_self(); - mdbx_debug("renew txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO - "/%" PRIaPGNO, - txn->mt_txnid, (txn->mt_flags & MDBX_RDONLY) ? 'r' : 'w', - (void *)txn, (void *)txn->mt_env, txn->mt_dbs[MAIN_DBI].md_root, - txn->mt_dbs[FREE_DBI].md_root); - } - return rc; -} - -int mdbx_txn_begin(MDBX_env *env, MDBX_txn *parent, unsigned flags, - MDBX_txn **ret) { - MDBX_txn *txn; - int rc; - unsigned size, tsize; - - if (unlikely(!ret)) - return MDBX_EINVAL; - *ret = NULL; - - if (unlikely(!env)) - return MDBX_EINVAL; - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) - env->me_flags |= MDBX_FATAL_ERROR; -#endif /* MDBX_TXN_CHECKPID */ - - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) - return MDBX_PANIC; - -#if !defined(_WIN32) && !defined(_WIN64) - /* Don't check env->me_map until lock to - * avoid race with re-mapping for shrinking */ - if (unlikely(!env->me_map)) - return MDBX_EPERM; -#endif /* Windows */ - - if (unlikely(flags & ~MDBX_TXN_BEGIN_FLAGS)) - return MDBX_EINVAL; - - if (unlikely(env->me_flags & MDBX_RDONLY & - ~flags)) /* write txn in RDONLY env */ - return MDBX_EACCESS; - - flags |= env->me_flags & MDBX_WRITEMAP; - - if (parent) { - /* Nested transactions: Max 1 child, write txns only, no writemap */ - rc = check_txn_rw(parent, MDBX_RDONLY | MDBX_WRITEMAP | MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - -#if defined(_WIN32) || defined(_WIN64) - if (unlikely(!env->me_map)) - return MDBX_EPERM; -#endif /* Windows */ - - flags |= parent->mt_flags & (MDBX_TXN_BEGIN_FLAGS | MDBX_TXN_SPILLS); - /* Child txns save MDBX_pgstate and use own copy of cursors */ - size = env->me_maxdbs * (sizeof(MDBX_db) + sizeof(MDBX_cursor *) + 1); - size += tsize = sizeof(MDBX_txn); - } else if (flags & MDBX_RDONLY) { - if (env->me_txn0 && - unlikely(env->me_txn0->mt_owner == mdbx_thread_self()) && - (mdbx_runtime_flags & MDBX_DBG_LEGACY_OVERLAP) == 0) - return MDBX_TXN_OVERLAPPING; - size = env->me_maxdbs * (sizeof(MDBX_db) + 1); - size += tsize = sizeof(MDBX_txn); - } else { - /* Reuse preallocated write txn. However, do not touch it until - * mdbx_txn_renew0() succeeds, since it currently may be active. */ - txn = env->me_txn0; - goto renew; - } - if (unlikely((txn = mdbx_malloc(size)) == NULL)) { - mdbx_debug("calloc: %s", "failed"); - return MDBX_ENOMEM; - } - memset(txn, 0, tsize); - txn->mt_dbxs = env->me_dbxs; /* static */ - txn->mt_dbs = (MDBX_db *)((char *)txn + tsize); - txn->mt_dbflags = (uint8_t *)txn + size - env->me_maxdbs; - txn->mt_flags = flags; - txn->mt_env = env; - - if (parent) { - mdbx_tassert(txn, mdbx_dirtylist_check(parent)); - txn->mt_cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = parent->mt_dbiseqs; - txn->tw.dirtylist = mdbx_malloc(sizeof(MDBX_DP) * (MDBX_DPL_TXNFULL + 1)); - txn->tw.reclaimed_pglist = - mdbx_pnl_alloc(MDBX_PNL_ALLOCLEN(parent->tw.reclaimed_pglist)); - if (!txn->tw.dirtylist || !txn->tw.reclaimed_pglist) { - mdbx_pnl_free(txn->tw.reclaimed_pglist); - mdbx_free(txn->tw.dirtylist); - mdbx_free(txn); - return MDBX_ENOMEM; - } - mdbx_dpl_clear(txn->tw.dirtylist); - memcpy(txn->tw.reclaimed_pglist, parent->tw.reclaimed_pglist, - MDBX_PNL_SIZEOF(parent->tw.reclaimed_pglist)); - mdbx_assert(env, mdbx_pnl_check4assert( - txn->tw.reclaimed_pglist, - (txn->mt_next_pgno /* LY: intentional assigment here, - only for assertion */ - = parent->mt_next_pgno))); - - txn->tw.last_reclaimed = parent->tw.last_reclaimed; - if (parent->tw.lifo_reclaimed) { - txn->tw.lifo_reclaimed = parent->tw.lifo_reclaimed; - parent->tw.lifo_reclaimed = - (void *)(intptr_t)MDBX_PNL_SIZE(parent->tw.lifo_reclaimed); - } - - txn->tw.retired_pages = parent->tw.retired_pages; - parent->tw.retired_pages = - (void *)(intptr_t)MDBX_PNL_SIZE(parent->tw.retired_pages); - - txn->mt_txnid = parent->mt_txnid; - txn->tw.dirtyroom = parent->tw.dirtyroom; - txn->mt_geo = parent->mt_geo; - txn->tw.loose_refund_wl = parent->tw.loose_refund_wl; - txn->mt_canary = parent->mt_canary; - parent->mt_flags |= MDBX_TXN_HAS_CHILD; - parent->mt_child = txn; - txn->mt_parent = parent; - txn->mt_numdbs = parent->mt_numdbs; - txn->mt_owner = parent->mt_owner; - memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDBX_db)); - /* Copy parent's mt_dbflags, but clear DB_NEW */ - for (unsigned i = 0; i < txn->mt_numdbs; i++) - txn->mt_dbflags[i] = parent->mt_dbflags[i] & ~(DB_FRESH | DB_CREAT); - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - env->me_txn = txn; - rc = mdbx_cursor_shadow(parent, txn); - if (unlikely(rc != MDBX_SUCCESS)) - mdbx_txn_end(txn, MDBX_END_FAIL_BEGINCHILD); - } else { /* MDBX_RDONLY */ - txn->mt_dbiseqs = env->me_dbiseqs; - renew: - rc = mdbx_txn_renew0(txn, flags); - } - - if (unlikely(rc != MDBX_SUCCESS)) { - if (txn != env->me_txn0) - mdbx_free(txn); - } else { - mdbx_assert(env, - (txn->mt_flags & ~(MDBX_NOTLS | MDBX_RDONLY | MDBX_WRITEMAP | - MDBX_SHRINK_ALLOWED | MDBX_NOMETASYNC | - MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) == 0); - txn->mt_signature = MDBX_MT_SIGNATURE; - *ret = txn; - mdbx_debug("begin txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO - "/%" PRIaPGNO, - txn->mt_txnid, (flags & MDBX_RDONLY) ? 'r' : 'w', (void *)txn, - (void *)env, txn->mt_dbs[MAIN_DBI].md_root, - txn->mt_dbs[FREE_DBI].md_root); - } - - return rc; -} - -int mdbx_txn_info(MDBX_txn *txn, MDBX_txn_info *info, int scan_rlt) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!info)) - return MDBX_EINVAL; - - MDBX_env *const env = txn->mt_env; -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_TXN_CHECKPID */ - - info->txn_id = txn->mt_txnid; - info->txn_space_used = pgno2bytes(env, txn->mt_geo.next); - - if (txn->mt_flags & MDBX_RDONLY) { - const MDBX_meta *head_meta; - txnid_t head_txnid; - uint64_t head_retired; - do { - /* fetch info from volatile head */ - head_meta = mdbx_meta_head(env); - head_txnid = mdbx_meta_txnid_fluid(env, head_meta); - head_retired = head_meta->mm_pages_retired; - info->txn_space_limit_soft = pgno2bytes(env, head_meta->mm_geo.now); - info->txn_space_limit_hard = pgno2bytes(env, head_meta->mm_geo.upper); - info->txn_space_leftover = - pgno2bytes(env, head_meta->mm_geo.now - head_meta->mm_geo.next); - mdbx_compiler_barrier(); - } while (unlikely(head_meta != mdbx_meta_head(env) || - head_txnid != mdbx_meta_txnid_fluid(env, head_meta))); - - info->txn_reader_lag = head_txnid - info->txn_id; - info->txn_space_dirty = info->txn_space_retired = 0; - if (txn->to.reader && - head_retired > txn->to.reader->mr_snapshot_pages_retired) { - info->txn_space_dirty = info->txn_space_retired = - pgno2bytes(env, (pgno_t)(head_retired - - txn->to.reader->mr_snapshot_pages_retired)); - - size_t retired_next_reader = 0; - MDBX_lockinfo *const lck = env->me_lck; - if (scan_rlt && info->txn_reader_lag > 1 && lck) { - /* find next more recent reader */ - txnid_t next_reader = head_txnid; - const unsigned snap_nreaders = lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (lck->mti_readers[i].mr_pid) { - mdbx_jitter4testing(true); - const txnid_t snap_txnid = - safe64_read(&lck->mti_readers[i].mr_txnid); - const uint64_t snap_retired = - lck->mti_readers[i].mr_snapshot_pages_retired; - mdbx_compiler_barrier(); - if (unlikely(snap_retired != - lck->mti_readers[i].mr_snapshot_pages_retired) || - snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid)) - goto retry; - if (snap_txnid <= txn->mt_txnid) { - retired_next_reader = 0; - break; - } - if (snap_txnid < next_reader) { - next_reader = snap_txnid; - retired_next_reader = pgno2bytes( - env, (pgno_t)(snap_retired - - txn->to.reader->mr_snapshot_pages_retired)); - } - } - } - } - info->txn_space_dirty = retired_next_reader; - } - } else { - info->txn_space_limit_soft = pgno2bytes(env, txn->mt_geo.now); - info->txn_space_limit_hard = pgno2bytes(env, txn->mt_geo.upper); - info->txn_space_retired = pgno2bytes( - env, txn->mt_child ? (unsigned)(uintptr_t)txn->tw.retired_pages - : MDBX_PNL_SIZE(txn->tw.retired_pages)); - info->txn_space_leftover = pgno2bytes(env, txn->tw.dirtyroom); - info->txn_space_dirty = - pgno2bytes(env, MDBX_DPL_TXNFULL - txn->tw.dirtyroom); - info->txn_reader_lag = INT64_MAX; - MDBX_lockinfo *const lck = env->me_lck; - if (scan_rlt && lck) { - txnid_t oldest_snapshot = txn->mt_txnid; - const unsigned snap_nreaders = lck->mti_numreaders; - if (snap_nreaders) { - oldest_snapshot = mdbx_find_oldest(txn); - if (oldest_snapshot == txn->mt_txnid - 1) { - /* check if there is at least one reader */ - bool exists = false; - for (unsigned i = 0; i < snap_nreaders; ++i) { - if (lck->mti_readers[i].mr_pid && - txn->mt_txnid > safe64_read(&lck->mti_readers[i].mr_txnid)) { - exists = true; - break; - } - } - oldest_snapshot += !exists; - } - } - info->txn_reader_lag = txn->mt_txnid - oldest_snapshot; - } - } - - return MDBX_SUCCESS; -} - -MDBX_env *mdbx_txn_env(MDBX_txn *txn) { - if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE || - txn->mt_env->me_signature != MDBX_ME_SIGNATURE)) - return NULL; - return txn->mt_env; -} - -uint64_t mdbx_txn_id(MDBX_txn *txn) { - if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE)) - return 0; - return txn->mt_txnid; -} - -int mdbx_txn_flags(MDBX_txn *txn) { - if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE)) - return -1; - return txn->mt_flags; -} - -/* Export or close DBI handles opened in this txn. */ -static void mdbx_dbis_update(MDBX_txn *txn, int keep) { - MDBX_dbi n = txn->mt_numdbs; - if (n) { - bool locked = false; - MDBX_env *env = txn->mt_env; - uint8_t *tdbflags = txn->mt_dbflags; - - for (unsigned i = n; --i >= CORE_DBS;) { - if (likely((tdbflags[i] & DB_CREAT) == 0)) - continue; - if (!locked) { - mdbx_ensure(env, - mdbx_fastmutex_acquire(&env->me_dbi_lock) == MDBX_SUCCESS); - locked = true; - } - if (keep) { - env->me_dbflags[i] = txn->mt_dbs[i].md_flags | MDBX_VALID; - mdbx_compiler_barrier(); - if (env->me_numdbs <= i) - env->me_numdbs = i + 1; - } else { - char *ptr = env->me_dbxs[i].md_name.iov_base; - if (ptr) { - env->me_dbxs[i].md_name.iov_len = 0; - mdbx_compiler_barrier(); - mdbx_assert(env, env->me_dbflags[i] == 0); - env->me_dbiseqs[i]++; - env->me_dbxs[i].md_name.iov_base = NULL; - mdbx_free(ptr); - } - } - } - - if (unlikely(locked)) - mdbx_ensure(env, - mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); - } -} - -/* End a transaction, except successful commit of a nested transaction. - * May be called twice for readonly txns: First reset it, then abort. - * [in] txn the transaction handle to end - * [in] mode why and how to end the transaction */ -static int mdbx_txn_end(MDBX_txn *txn, unsigned mode) { - MDBX_env *env = txn->mt_env; - static const char *const names[] = MDBX_END_NAMES; - -#if MDBX_TXN_CHECKPID - if (unlikely(txn->mt_env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_TXN_CHECKPID */ - - mdbx_debug("%s txn %" PRIaTXN "%c %p on mdbenv %p, root page %" PRIaPGNO - "/%" PRIaPGNO, - names[mode & MDBX_END_OPMASK], txn->mt_txnid, - (txn->mt_flags & MDBX_RDONLY) ? 'r' : 'w', (void *)txn, - (void *)env, txn->mt_dbs[MAIN_DBI].md_root, - txn->mt_dbs[FREE_DBI].md_root); - - mdbx_ensure(env, txn->mt_txnid >= - /* paranoia is appropriate here */ *env->me_oldest); - - int rc = MDBX_SUCCESS; - if (F_ISSET(txn->mt_flags, MDBX_RDONLY)) { - if (txn->to.reader) { - MDBX_reader *slot = txn->to.reader; - mdbx_assert(env, slot->mr_pid == env->me_pid); - if (likely(!F_ISSET(txn->mt_flags, MDBX_TXN_FINISHED))) { - mdbx_assert(env, txn->mt_txnid == slot->mr_txnid.inconsistent && - slot->mr_txnid.inconsistent >= - env->me_lck->mti_oldest_reader); -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - mdbx_txn_valgrind(env, nullptr); -#endif - slot->mr_snapshot_pages_used = 0; - safe64_reset(&slot->mr_txnid, false); - env->me_lck->mti_readers_refresh_flag = true; - mdbx_flush_incoherent_cpu_writeback(); - } else { - mdbx_assert(env, slot->mr_pid == env->me_pid); - mdbx_assert(env, - slot->mr_txnid.inconsistent >= SAFE64_INVALID_THRESHOLD); - } - if (mode & MDBX_END_SLOT) { - if ((env->me_flags & MDBX_ENV_TXKEY) == 0) - slot->mr_pid = 0; - txn->to.reader = NULL; - } - } -#if defined(_WIN32) || defined(_WIN64) - if (txn->mt_flags & MDBX_SHRINK_ALLOWED) - mdbx_srwlock_ReleaseShared(&env->me_remap_guard); -#endif - txn->mt_numdbs = 0; /* prevent further DBI activity */ - txn->mt_flags = MDBX_RDONLY | MDBX_TXN_FINISHED; - txn->mt_owner = 0; - } else if (!F_ISSET(txn->mt_flags, MDBX_TXN_FINISHED)) { -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - if (txn == env->me_txn0) - mdbx_txn_valgrind(env, nullptr); -#endif - /* Export or close DBI handles created in this txn */ - mdbx_dbis_update(txn, mode & MDBX_END_UPDATE); - if (!(mode & MDBX_END_EOTDONE)) /* !(already closed cursors) */ - mdbx_cursors_eot(txn, 0); - if (!(env->me_flags & MDBX_WRITEMAP)) - mdbx_dlist_free(txn); - - txn->mt_flags = MDBX_TXN_FINISHED; - txn->mt_owner = 0; - env->me_txn = txn->mt_parent; - if (txn == env->me_txn0) { - mdbx_assert(env, txn->mt_parent == NULL); - mdbx_pnl_shrink(&txn->tw.retired_pages); - mdbx_pnl_shrink(&txn->tw.reclaimed_pglist); - /* The writer mutex was locked in mdbx_txn_begin. */ - mdbx_txn_unlock(env); - } else { - mdbx_assert(env, txn->mt_parent != NULL); - mdbx_assert(env, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - MDBX_txn *const parent = txn->mt_parent; - env->me_txn->mt_child = NULL; - env->me_txn->mt_flags &= ~MDBX_TXN_HAS_CHILD; - mdbx_pnl_free(txn->tw.reclaimed_pglist); - mdbx_pnl_free(txn->tw.spill_pages); - - if (txn->tw.lifo_reclaimed) { - mdbx_assert(env, MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) >= - (unsigned)(uintptr_t)parent->tw.lifo_reclaimed); - MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) = - (unsigned)(uintptr_t)parent->tw.lifo_reclaimed; - parent->tw.lifo_reclaimed = txn->tw.lifo_reclaimed; - } - - if (txn->tw.retired_pages) { - mdbx_assert(env, MDBX_PNL_SIZE(txn->tw.retired_pages) >= - (unsigned)(uintptr_t)parent->tw.retired_pages); - MDBX_PNL_SIZE(txn->tw.retired_pages) = - (unsigned)(uintptr_t)parent->tw.retired_pages; - parent->tw.retired_pages = txn->tw.retired_pages; - } - - mdbx_free(txn->tw.dirtylist); - - if (parent->mt_geo.upper != txn->mt_geo.upper || - parent->mt_geo.now != txn->mt_geo.now) { - /* undo resize performed by child txn */ - rc = mdbx_mapresize(env, parent->mt_next_pgno, parent->mt_geo.now, - parent->mt_geo.upper); - if (rc == MDBX_RESULT_TRUE) { - /* unable undo resize (it is regular for Windows), - * therefore promote size changes from child to the parent txn */ - mdbx_notice("unable undo resize performed by child txn, promote to " - "the parent (%u->%u, %u->%u)", - txn->mt_geo.now, parent->mt_geo.now, txn->mt_geo.upper, - parent->mt_geo.upper); - parent->mt_geo.now = txn->mt_geo.now; - parent->mt_geo.upper = txn->mt_geo.upper; - rc = MDBX_SUCCESS; - } else if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_error("error %d while undo resize performed by child txn, fail " - "the parent", - rc); - parent->mt_flags |= MDBX_TXN_ERROR; - if (!env->me_dxb_mmap.address) - env->me_flags |= MDBX_FATAL_ERROR; - } - } - } - } - - mdbx_assert(env, txn == env->me_txn0 || txn->mt_owner == 0); - if ((mode & MDBX_END_FREE) != 0 && txn != env->me_txn0) { - txn->mt_signature = 0; - mdbx_free(txn); - } - - return rc; -} - -int mdbx_txn_reset(MDBX_txn *txn) { - int rc = check_txn(txn, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - /* This call is only valid for read-only txns */ - if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0)) - return MDBX_EINVAL; - - /* LY: don't close DBI-handles */ - rc = mdbx_txn_end(txn, MDBX_END_RESET | MDBX_END_UPDATE); - if (rc == MDBX_SUCCESS) { - mdbx_tassert(txn, txn->mt_signature == MDBX_MT_SIGNATURE); - mdbx_tassert(txn, txn->mt_owner == 0); - } - return rc; -} - -int mdbx_txn_abort(MDBX_txn *txn) { - int rc = check_txn(txn, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (F_ISSET(txn->mt_flags, MDBX_RDONLY)) - /* LY: don't close DBI-handles */ - return mdbx_txn_end(txn, MDBX_END_ABORT | MDBX_END_UPDATE | MDBX_END_SLOT | - MDBX_END_FREE); - - if (txn->mt_child) - mdbx_txn_abort(txn->mt_child); - - return mdbx_txn_end(txn, MDBX_END_ABORT | MDBX_END_SLOT | MDBX_END_FREE); -} - -/* Count all the pages in each DB and in the freelist and make sure - * it matches the actual number of pages being used. - * All named DBs must be open for a correct count. */ -static __cold int mdbx_audit_ex(MDBX_txn *txn, unsigned retired_stored, - bool dont_filter_gc) { - pgno_t pending = 0; - if ((txn->mt_flags & MDBX_RDONLY) == 0) { - pending = txn->tw.loose_count + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) + - (MDBX_PNL_SIZE(txn->tw.retired_pages) - retired_stored) + - txn->tw.retired2parent_count; - for (MDBX_txn *parent = txn->mt_parent; parent; parent = parent->mt_parent) - pending += parent->tw.loose_count; - } - - MDBX_cursor_couple cx; - int rc = mdbx_cursor_init(&cx.outer, txn, FREE_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - pgno_t freecount = 0; - MDBX_val key, data; - while ((rc = mdbx_cursor_get(&cx.outer, &key, &data, MDBX_NEXT)) == 0) { - if (!dont_filter_gc) { - if (unlikely(key.iov_len != sizeof(txnid_t))) - return MDBX_CORRUPTED; - txnid_t id = unaligned_peek_u64(4, key.iov_base); - if (txn->tw.lifo_reclaimed) { - for (unsigned i = 1; i <= MDBX_PNL_SIZE(txn->tw.lifo_reclaimed); ++i) - if (id == txn->tw.lifo_reclaimed[i]) - goto skip; - } else if (id <= txn->tw.last_reclaimed) - goto skip; - } - - freecount += *(pgno_t *)data.iov_base; - skip:; - } - mdbx_tassert(txn, rc == MDBX_NOTFOUND); - - for (MDBX_dbi i = FREE_DBI; i < txn->mt_numdbs; i++) - txn->mt_dbflags[i] &= ~DB_AUDITED; - - pgno_t count = 0; - for (MDBX_dbi i = FREE_DBI; i <= MAIN_DBI; i++) { - if (!(txn->mt_dbflags[i] & DB_VALID)) - continue; - rc = mdbx_cursor_init(&cx.outer, txn, i); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - txn->mt_dbflags[i] |= DB_AUDITED; - if (txn->mt_dbs[i].md_root == P_INVALID) - continue; - count += txn->mt_dbs[i].md_branch_pages + txn->mt_dbs[i].md_leaf_pages + - txn->mt_dbs[i].md_overflow_pages; - - if (i != MAIN_DBI) - continue; - rc = mdbx_page_search(&cx.outer, NULL, MDBX_PS_FIRST); - while (rc == MDBX_SUCCESS) { - MDBX_page *mp = cx.outer.mc_pg[cx.outer.mc_top]; - for (unsigned j = 0; j < page_numkeys(mp); j++) { - MDBX_node *node = page_node(mp, j); - if (node_flags(node) == F_SUBDATA) { - if (unlikely(node_ds(node) < sizeof(MDBX_db))) - return MDBX_CORRUPTED; - MDBX_db db_copy, *db; - memcpy(db = &db_copy, node_data(node), sizeof(db_copy)); - if ((txn->mt_flags & MDBX_RDONLY) == 0) { - for (MDBX_dbi k = txn->mt_numdbs; --k > MAIN_DBI;) { - if ((txn->mt_dbflags[k] & DB_VALID) && - /* txn->mt_dbxs[k].md_name.iov_len > 0 && */ - node_ks(node) == txn->mt_dbxs[k].md_name.iov_len && - memcmp(node_key(node), txn->mt_dbxs[k].md_name.iov_base, - node_ks(node)) == 0) { - txn->mt_dbflags[k] |= DB_AUDITED; - if (txn->mt_dbflags[k] & DB_DIRTY) { - mdbx_tassert(txn, (txn->mt_dbflags[k] & DB_STALE) == 0); - db = txn->mt_dbs + k; - } - break; - } - } - } - count += - db->md_branch_pages + db->md_leaf_pages + db->md_overflow_pages; - } - } - rc = mdbx_cursor_sibling(&cx.outer, 1); - } - mdbx_tassert(txn, rc == MDBX_NOTFOUND); - } - - for (MDBX_dbi i = FREE_DBI; i < txn->mt_numdbs; i++) { - if ((txn->mt_dbflags[i] & (DB_VALID | DB_AUDITED | DB_STALE)) != DB_VALID) - continue; - if (F_ISSET(txn->mt_dbflags[i], DB_DIRTY | DB_CREAT)) { - count += txn->mt_dbs[i].md_branch_pages + txn->mt_dbs[i].md_leaf_pages + - txn->mt_dbs[i].md_overflow_pages; - } else { - mdbx_warning("audit %s@%" PRIaTXN - ": unable account dbi %d / \"%*s\", state 0x%02x", - txn->mt_parent ? "nested-" : "", txn->mt_txnid, i, - (int)txn->mt_dbxs[i].md_name.iov_len, - (const char *)txn->mt_dbxs[i].md_name.iov_base, - txn->mt_dbflags[i]); - } - } - - if (pending + freecount + count + NUM_METAS == txn->mt_next_pgno) - return MDBX_SUCCESS; - - if ((txn->mt_flags & MDBX_RDONLY) == 0) - mdbx_error("audit @%" PRIaTXN ": %u(pending) = %u(loose-count) + " - "%u(reclaimed-list) + %u(retired-pending) - %u(retired-stored) " - "+ %u(retired2parent)", - txn->mt_txnid, pending, txn->tw.loose_count, - MDBX_PNL_SIZE(txn->tw.reclaimed_pglist), - txn->tw.retired_pages ? MDBX_PNL_SIZE(txn->tw.retired_pages) : 0, - retired_stored, txn->tw.retired2parent_count); - mdbx_error("audit @%" PRIaTXN ": %" PRIaPGNO "(pending) + %" PRIaPGNO - "(free) + %" PRIaPGNO "(count) = %" PRIaPGNO - "(total) <> %" PRIaPGNO "(next-pgno)", - txn->mt_txnid, pending, freecount, count + NUM_METAS, - pending + freecount + count + NUM_METAS, txn->mt_next_pgno); - return MDBX_PROBLEM; -} - -static __always_inline unsigned backlog_size(MDBX_txn *txn) { - return MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) + txn->tw.loose_count; -} - -/* LY: Prepare a backlog of pages to modify GC itself, - * while reclaiming is prohibited. It should be enough to prevent search - * in mdbx_page_alloc() during a deleting, when GC tree is unbalanced. */ -static int mdbx_prep_backlog(MDBX_txn *txn, MDBX_cursor *gc_cursor, - const size_t pnl_bytes) { - const unsigned linear4list = number_of_ovpages(txn->mt_env, pnl_bytes); - const unsigned backlog4cow = txn->mt_dbs[FREE_DBI].md_depth; - const unsigned backlog4rebalance = backlog4cow + 1; - - if (likely(linear4list == 1 && - backlog_size(txn) > (pnl_bytes - ? backlog4rebalance - : (backlog4cow + backlog4rebalance)))) - return MDBX_SUCCESS; - - mdbx_trace(">> pnl_bytes %zu, backlog %u, 4list %u, 4cow %u, 4rebalance %u", - pnl_bytes, backlog_size(txn), linear4list, backlog4cow, - backlog4rebalance); - - gc_cursor->mc_flags &= ~C_RECLAIMING; - int err = mdbx_cursor_touch(gc_cursor); - mdbx_trace("== after-touch, backlog %u, err %d", backlog_size(txn), err); - - if (linear4list > 1 && err == MDBX_SUCCESS) { - err = mdbx_page_alloc(gc_cursor, linear4list, nullptr, - MDBX_ALLOC_GC | MDBX_ALLOC_CACHE); - mdbx_trace("== after-4linear, backlog %u, err %d", backlog_size(txn), err); - } - - while (backlog_size(txn) < backlog4cow + linear4list && err == MDBX_SUCCESS) - err = mdbx_page_alloc(gc_cursor, 1, NULL, MDBX_ALLOC_GC); - - gc_cursor->mc_flags |= C_RECLAIMING; - mdbx_trace("<< backlog %u, err %d", backlog_size(txn), err); - return (err != MDBX_NOTFOUND) ? err : MDBX_SUCCESS; -} - -static __inline void clean_reserved_gc_pnl(MDBX_env *env, MDBX_val pnl) { - /* PNL is initially empty, zero out at least the length */ - memset(pnl.iov_base, 0, sizeof(pgno_t)); - if ((env->me_flags & (MDBX_WRITEMAP | MDBX_NOMEMINIT)) == 0) - /* zero out to avoid leaking values from uninitialized malloc'ed memory - * to the file in non-writemap mode if length of the saving page-list - * was changed during space reservation. */ - memset(pnl.iov_base, 0, pnl.iov_len); -} - -/* Cleanup reclaimed GC records, than save the retired-list as of this - * transaction to GC (aka freeDB). This recursive changes the reclaimed-list - * loose-list and retired-list. Keep trying until it stabilizes. */ -static int mdbx_update_gc(MDBX_txn *txn) { - /* txn->tw.reclaimed_pglist[] can grow and shrink during this call. - * txn->tw.last_reclaimed and txn->tw.retired_pages[] can only grow. - * Page numbers cannot disappear from txn->tw.retired_pages[]. */ - MDBX_env *const env = txn->mt_env; - const bool lifo = (env->me_flags & MDBX_LIFORECLAIM) != 0; - const char *dbg_prefix_mode = lifo ? " lifo" : " fifo"; - (void)dbg_prefix_mode; - mdbx_trace("\n>>> @%" PRIaTXN, txn->mt_txnid); - - unsigned retired_stored = 0, loop = 0; - MDBX_cursor mc; - int rc = mdbx_cursor_init(&mc, txn, FREE_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout_notracking; - - mc.mc_flags |= C_RECLAIMING; - mc.mc_next = txn->mt_cursors[FREE_DBI]; - txn->mt_cursors[FREE_DBI] = &mc; - -retry: - mdbx_trace("%s", " >> restart"); - mdbx_tassert( - txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - if (unlikely(/* paranoia */ ++loop > 42)) { - mdbx_error("too more loops %u, bailout", loop); - rc = MDBX_PROBLEM; - goto bailout; - } - - rc = mdbx_prep_backlog(txn, &mc, MDBX_PNL_SIZEOF(txn->tw.retired_pages)); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - unsigned settled = 0, cleaned_gc_slot = 0, reused_gc_slot = 0, - filled_gc_slot = ~0u; - txnid_t cleaned_gc_id = 0, gc_rid = txn->tw.last_reclaimed; - while (true) { - /* Come back here after each Put() in case retired-list changed */ - MDBX_val key, data; - mdbx_trace("%s", " >> continue"); - - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - if (txn->tw.lifo_reclaimed) { - if (cleaned_gc_slot < MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)) { - settled = 0; - cleaned_gc_slot = 0; - reused_gc_slot = 0; - filled_gc_slot = ~0u; - /* LY: cleanup reclaimed records. */ - do { - cleaned_gc_id = txn->tw.lifo_reclaimed[++cleaned_gc_slot]; - mdbx_tassert(txn, - cleaned_gc_slot > 0 && cleaned_gc_id < *env->me_oldest); - key.iov_base = &cleaned_gc_id; - key.iov_len = sizeof(cleaned_gc_id); - rc = mdbx_cursor_get(&mc, &key, NULL, MDBX_SET); - if (rc == MDBX_NOTFOUND) - continue; - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - rc = mdbx_prep_backlog(txn, &mc, 0); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - mdbx_tassert(txn, cleaned_gc_id < *env->me_oldest); - mdbx_trace("%s.cleanup-reclaimed-id [%u]%" PRIaTXN, dbg_prefix_mode, - cleaned_gc_slot, cleaned_gc_id); - rc = mdbx_cursor_del(&mc, 0); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } while (cleaned_gc_slot < MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); - mdbx_txl_sort(txn->tw.lifo_reclaimed); - } - } else { - /* If using records from GC which we have not yet deleted, - * now delete them and any we reserved for me_reclaimed_pglist. */ - while (cleaned_gc_id <= txn->tw.last_reclaimed) { - gc_rid = cleaned_gc_id; - settled = 0; - rc = mdbx_cursor_first(&mc, &key, NULL); - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc == MDBX_NOTFOUND) - break; - goto bailout; - } - if (unlikely(key.iov_len != sizeof(txnid_t))) { - rc = MDBX_CORRUPTED; - goto bailout; - } - cleaned_gc_id = unaligned_peek_u64(4, key.iov_base); - if (unlikely(cleaned_gc_id < 1 || - cleaned_gc_id >= SAFE64_INVALID_THRESHOLD)) { - rc = MDBX_CORRUPTED; - goto bailout; - } - if (cleaned_gc_id > txn->tw.last_reclaimed) - break; - if (cleaned_gc_id < txn->tw.last_reclaimed) { - rc = mdbx_prep_backlog(txn, &mc, 0); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - mdbx_tassert(txn, cleaned_gc_id <= txn->tw.last_reclaimed); - mdbx_tassert(txn, cleaned_gc_id < *env->me_oldest); - mdbx_trace("%s.cleanup-reclaimed-id %" PRIaTXN, dbg_prefix_mode, - cleaned_gc_id); - rc = mdbx_cursor_del(&mc, 0); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - } - - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - if (mdbx_audit_enabled()) { - rc = mdbx_audit_ex(txn, retired_stored, false); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - - /* return suitable into unallocated space */ - if (mdbx_refund(txn)) { - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - if (mdbx_audit_enabled()) { - rc = mdbx_audit_ex(txn, retired_stored, false); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - } - - /* handle loose pages - put ones into the reclaimed- or retired-list */ - if (txn->tw.loose_pages) { - /* Return loose page numbers to me_reclaimed_pglist, - * though usually none are left at this point. - * The pages themselves remain in dirtylist. */ - if (unlikely(!txn->tw.lifo_reclaimed && txn->tw.last_reclaimed < 1)) { - if (txn->tw.loose_count > 0) { - /* Put loose page numbers in tw.retired_pages, - * since unable to return them to me_reclaimed_pglist. */ - if (unlikely((rc = mdbx_pnl_need(&txn->tw.retired_pages, - txn->tw.loose_count)) != 0)) - goto bailout; - for (MDBX_page *mp = txn->tw.loose_pages; mp; mp = mp->mp_next) - mdbx_pnl_xappend(txn->tw.retired_pages, mp->mp_pgno); - mdbx_trace("%s: append %u loose-pages to retired-pages", - dbg_prefix_mode, txn->tw.loose_count); - } - } else { - /* Room for loose pages + temp PNL with same */ - rc = mdbx_pnl_need(&txn->tw.reclaimed_pglist, - 2 * txn->tw.loose_count + 2); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - MDBX_PNL loose = txn->tw.reclaimed_pglist + - MDBX_PNL_ALLOCLEN(txn->tw.reclaimed_pglist) - - txn->tw.loose_count - 1; - unsigned count = 0; - for (MDBX_page *mp = txn->tw.loose_pages; mp; mp = mp->mp_next) { - mdbx_tassert(txn, mp->mp_flags == (P_LOOSE | P_DIRTY)); - loose[++count] = mp->mp_pgno; - } - mdbx_tassert(txn, count == txn->tw.loose_count); - MDBX_PNL_SIZE(loose) = count; - mdbx_pnl_sort(loose); - mdbx_pnl_xmerge(txn->tw.reclaimed_pglist, loose); - mdbx_trace("%s: append %u loose-pages to reclaimed-pages", - dbg_prefix_mode, txn->tw.loose_count); - } - - /* filter-out list of dirty-pages from loose-pages */ - const MDBX_DPL dl = txn->tw.dirtylist; - unsigned w = 0; - for (unsigned r = w; ++r <= dl->length;) { - MDBX_page *dp = dl[r].ptr; - mdbx_tassert(txn, (dp->mp_flags & P_DIRTY)); - mdbx_tassert(txn, dl[r].pgno + (IS_OVERFLOW(dp) ? dp->mp_pages : 1) <= - txn->mt_next_pgno); - if ((dp->mp_flags & P_LOOSE) == 0) { - if (++w != r) - dl[w] = dl[r]; - } else { - mdbx_tassert(txn, dp->mp_flags == (P_LOOSE | P_DIRTY)); - if ((env->me_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(env, dp, 1); - } - } - mdbx_trace("%s: filtered-out loose-pages from %u -> %u dirty-pages", - dbg_prefix_mode, dl->length, w); - mdbx_tassert(txn, txn->tw.loose_count == dl->length - w); - dl->length = w; - dl->sorted = 0; - txn->tw.dirtyroom += txn->tw.loose_count; - txn->tw.loose_pages = NULL; - txn->tw.loose_count = 0; - } - - const unsigned amount = (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist); - /* handle retired-list - store ones into single gc-record */ - if (retired_stored < MDBX_PNL_SIZE(txn->tw.retired_pages)) { - if (unlikely(!retired_stored)) { - /* Make sure last page of GC is touched and on retired-list */ - mc.mc_flags &= ~C_RECLAIMING; - rc = mdbx_page_search(&mc, NULL, MDBX_PS_LAST | MDBX_PS_MODIFY); - mc.mc_flags |= C_RECLAIMING; - if (unlikely(rc != MDBX_SUCCESS) && rc != MDBX_NOTFOUND) - goto bailout; - } - /* Write to last page of GC */ - key.iov_len = sizeof(txn->mt_txnid); - key.iov_base = &txn->mt_txnid; - do { - data.iov_len = MDBX_PNL_SIZEOF(txn->tw.retired_pages); - mdbx_prep_backlog(txn, &mc, data.iov_len); - rc = mdbx_cursor_put(&mc, &key, &data, MDBX_RESERVE); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - /* Retry if tw.retired_pages[] grew during the Put() */ - } while (data.iov_len < MDBX_PNL_SIZEOF(txn->tw.retired_pages)); - - retired_stored = (unsigned)MDBX_PNL_SIZE(txn->tw.retired_pages); - mdbx_pnl_sort(txn->tw.retired_pages); - mdbx_assert(env, data.iov_len == MDBX_PNL_SIZEOF(txn->tw.retired_pages)); - memcpy(data.iov_base, txn->tw.retired_pages, data.iov_len); - - mdbx_trace("%s.put-retired #%u @ %" PRIaTXN, dbg_prefix_mode, - retired_stored, txn->mt_txnid); - - if (mdbx_log_enabled(MDBX_LOG_EXTRA)) { - unsigned i = retired_stored; - mdbx_debug_extra("PNL write txn %" PRIaTXN " root %" PRIaPGNO - " num %u, PNL", - txn->mt_txnid, txn->mt_dbs[FREE_DBI].md_root, i); - for (; i; i--) - mdbx_debug_extra_print(" %" PRIaPGNO, txn->tw.retired_pages[i]); - mdbx_debug_extra_print("%s", "\n"); - } - if (unlikely(amount != MDBX_PNL_SIZE(txn->tw.reclaimed_pglist))) { - mdbx_trace("%s.reclaimed-list changed %u -> %u, retry", dbg_prefix_mode, - amount, (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); - goto retry /* rare case, but avoids GC fragmentation and one loop. */; - } - continue; - } - - /* handle reclaimed and loost pages - merge and store both into gc */ - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - mdbx_tassert(txn, txn->tw.loose_count == 0); - - mdbx_trace("%s", " >> reserving"); - if (mdbx_audit_enabled()) { - rc = mdbx_audit_ex(txn, retired_stored, false); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - const unsigned left = amount - settled; - mdbx_trace("%s: amount %u, settled %d, left %d, lifo-reclaimed-slots %u, " - "reused-gc-slots %u", - dbg_prefix_mode, amount, settled, (int)left, - txn->tw.lifo_reclaimed - ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - : 0, - reused_gc_slot); - if (0 >= (int)left) - break; - - const unsigned prefer_max_scatter = 257; - txnid_t reservation_gc_id; - if (lifo) { - if (txn->tw.lifo_reclaimed == nullptr) { - txn->tw.lifo_reclaimed = mdbx_txl_alloc(); - if (unlikely(!txn->tw.lifo_reclaimed)) { - rc = MDBX_ENOMEM; - goto bailout; - } - } - if ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) < - prefer_max_scatter && - left > ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - - reused_gc_slot) * - env->me_maxgc_ov1page) { - - /* LY: need just a txn-id for save page list. */ - mc.mc_flags &= ~C_RECLAIMING; - bool need_cleanup = false; - do { - rc = mdbx_page_alloc(&mc, 0, NULL, MDBX_ALLOC_GC); - if (likely(rc == MDBX_SUCCESS)) { - mdbx_trace("%s: took @%" PRIaTXN " from GC", dbg_prefix_mode, - MDBX_PNL_LAST(txn->tw.lifo_reclaimed)); - need_cleanup = true; - } - } while (rc == MDBX_SUCCESS && - (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) < - prefer_max_scatter && - left > ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - - reused_gc_slot) * - env->me_maxgc_ov1page); - mc.mc_flags |= C_RECLAIMING; - - if (likely(rc == MDBX_SUCCESS)) { - mdbx_trace("%s: got enough from GC.", dbg_prefix_mode); - continue; - } else if (unlikely(rc != MDBX_NOTFOUND)) - /* LY: some troubles... */ - goto bailout; - - if (MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)) { - if (need_cleanup) - mdbx_txl_sort(txn->tw.lifo_reclaimed); - gc_rid = MDBX_PNL_LAST(txn->tw.lifo_reclaimed); - } else { - mdbx_tassert(txn, txn->tw.last_reclaimed == 0); - txn->tw.last_reclaimed = gc_rid = mdbx_find_oldest(txn) - 1; - mdbx_trace("%s: none recycled yet, set rid to @%" PRIaTXN, - dbg_prefix_mode, gc_rid); - } - - /* LY: GC is empty, will look any free txn-id in high2low order. */ - while (MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) < prefer_max_scatter && - left > ((unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - - reused_gc_slot) * - env->me_maxgc_ov1page) { - if (unlikely(gc_rid < 2)) { - if (unlikely(MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) <= - reused_gc_slot)) { - mdbx_notice("** restart: reserve depleted (reused_gc_slot %u >= " - "lifo_reclaimed %u" PRIaTXN, - reused_gc_slot, - (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); - goto retry; - } - break; - } - - mdbx_tassert(txn, gc_rid > 1 && gc_rid < SAFE64_INVALID_THRESHOLD); - rc = mdbx_txl_append(&txn->tw.lifo_reclaimed, --gc_rid); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - if (reused_gc_slot) - /* rare case, but it is better to clear and re-create GC entries - * with less fragmentation. */ - need_cleanup = true; - else - cleaned_gc_slot += - 1 /* mark cleanup is not needed for added slot. */; - - mdbx_trace("%s: append @%" PRIaTXN - " to lifo-reclaimed, cleaned-gc-slot = %u", - dbg_prefix_mode, gc_rid, cleaned_gc_slot); - } - - if (need_cleanup) { - cleaned_gc_slot = 0; - mdbx_trace("%s: restart inner-loop to clear and re-create GC entries", - dbg_prefix_mode); - continue; - } - } - - const unsigned i = - (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - reused_gc_slot; - mdbx_tassert(txn, i > 0 && i <= MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); - reservation_gc_id = txn->tw.lifo_reclaimed[i]; - mdbx_trace("%s: take @%" PRIaTXN " from lifo-reclaimed[%u]", - dbg_prefix_mode, reservation_gc_id, i); - } else { - mdbx_tassert(txn, txn->tw.lifo_reclaimed == NULL); - if (unlikely(gc_rid == 0)) { - gc_rid = mdbx_find_oldest(txn) - 1; - rc = mdbx_cursor_get(&mc, &key, NULL, MDBX_FIRST); - if (rc == MDBX_SUCCESS) { - if (unlikely(key.iov_len != sizeof(txnid_t))) { - rc = MDBX_CORRUPTED; - goto bailout; - } - txnid_t gc_first = unaligned_peek_u64(4, key.iov_base); - if (unlikely(gc_first < 1 || gc_first >= SAFE64_INVALID_THRESHOLD)) { - rc = MDBX_CORRUPTED; - goto bailout; - } - if (gc_rid >= gc_first) - gc_rid = gc_first - 1; - if (unlikely(gc_rid == 0)) { - mdbx_error("%s", "** no GC tail-space to store"); - goto retry; - } - } else if (rc != MDBX_NOTFOUND) - goto bailout; - txn->tw.last_reclaimed = gc_rid; - } - reservation_gc_id = gc_rid--; - mdbx_trace("%s: take @%" PRIaTXN " from head-gc-id", dbg_prefix_mode, - reservation_gc_id); - } - ++reused_gc_slot; - - unsigned chunk = left; - if (unlikely(chunk > env->me_maxgc_ov1page)) { - const unsigned avail_gc_slots = - txn->tw.lifo_reclaimed - ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - - reused_gc_slot + 1 - : (gc_rid < INT16_MAX) ? (unsigned)gc_rid : INT16_MAX; - if (avail_gc_slots > 1) { - if (chunk < env->me_maxgc_ov1page * 2) - chunk /= 2; - else { - const unsigned threshold = - env->me_maxgc_ov1page * ((avail_gc_slots < prefer_max_scatter) - ? avail_gc_slots - : prefer_max_scatter); - if (left < threshold) - chunk = env->me_maxgc_ov1page; - else { - const unsigned tail = left - threshold + env->me_maxgc_ov1page + 1; - unsigned span = 1; - unsigned avail = (unsigned)((pgno2bytes(env, span) - PAGEHDRSZ) / - sizeof(pgno_t)) /*- 1 + span */; - if (tail > avail) { - for (unsigned i = amount - span; i > 0; --i) { - if (MDBX_PNL_ASCENDING - ? (txn->tw.reclaimed_pglist[i] + span) - : (txn->tw.reclaimed_pglist[i] - span) == - txn->tw.reclaimed_pglist[i + span]) { - span += 1; - avail = (unsigned)((pgno2bytes(env, span) - PAGEHDRSZ) / - sizeof(pgno_t)) - - 1 + span; - if (avail >= tail) - break; - } - } - } - - chunk = (avail >= tail) ? tail - span - : (avail_gc_slots > 3 && - reused_gc_slot < prefer_max_scatter - 3) - ? avail - span - : tail; - } - } - } - } - mdbx_tassert(txn, chunk > 0); - - mdbx_trace("%s: rc_rid %" PRIaTXN ", reused_gc_slot %u, reservation-id " - "%" PRIaTXN, - dbg_prefix_mode, gc_rid, reused_gc_slot, reservation_gc_id); - - mdbx_trace("%s: chunk %u, gc-per-ovpage %u", dbg_prefix_mode, chunk, - env->me_maxgc_ov1page); - - mdbx_tassert(txn, reservation_gc_id < *env->me_oldest); - if (unlikely(reservation_gc_id < 1 || - reservation_gc_id >= *env->me_oldest)) { - mdbx_error("%s", "** internal error (reservation_gc_id)"); - rc = MDBX_PROBLEM; - goto bailout; - } - - key.iov_len = sizeof(reservation_gc_id); - key.iov_base = &reservation_gc_id; - data.iov_len = (chunk + 1) * sizeof(pgno_t); - mdbx_trace("%s.reserve: %u [%u...%u] @%" PRIaTXN, dbg_prefix_mode, chunk, - settled + 1, settled + chunk + 1, reservation_gc_id); - mdbx_prep_backlog(txn, &mc, data.iov_len); - rc = mdbx_cursor_put(&mc, &key, &data, MDBX_RESERVE | MDBX_NOOVERWRITE); - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno)); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - clean_reserved_gc_pnl(env, data); - settled += chunk; - mdbx_trace("%s.settled %u (+%u), continue", dbg_prefix_mode, settled, - chunk); - - if (txn->tw.lifo_reclaimed && - unlikely(amount < MDBX_PNL_SIZE(txn->tw.reclaimed_pglist))) { - mdbx_notice("** restart: reclaimed-list growth %u -> %u", amount, - (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); - goto retry; - } - - continue; - } - - mdbx_tassert( - txn, - cleaned_gc_slot == - (txn->tw.lifo_reclaimed ? MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) : 0)); - - mdbx_trace("%s", " >> filling"); - /* Fill in the reserved records */ - filled_gc_slot = - txn->tw.lifo_reclaimed - ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - reused_gc_slot - : reused_gc_slot; - rc = MDBX_SUCCESS; - mdbx_tassert( - txn, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, txn->mt_next_pgno)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - if (MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)) { - MDBX_val key, data; - key.iov_len = data.iov_len = 0; /* avoid MSVC warning */ - key.iov_base = data.iov_base = NULL; - - const unsigned amount = MDBX_PNL_SIZE(txn->tw.reclaimed_pglist); - unsigned left = amount; - if (txn->tw.lifo_reclaimed == nullptr) { - mdbx_tassert(txn, lifo == 0); - rc = mdbx_cursor_first(&mc, &key, &data); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } else { - mdbx_tassert(txn, lifo != 0); - } - - while (true) { - txnid_t fill_gc_id; - mdbx_trace("%s: left %u of %u", dbg_prefix_mode, left, - (unsigned)MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); - if (txn->tw.lifo_reclaimed == nullptr) { - mdbx_tassert(txn, lifo == 0); - fill_gc_id = unaligned_peek_u64(4, key.iov_base); - if (filled_gc_slot-- == 0 || fill_gc_id > txn->tw.last_reclaimed) { - mdbx_notice( - "** restart: reserve depleted (filled_slot %u, fill_id %" PRIaTXN - " > last_reclaimed %" PRIaTXN, - filled_gc_slot, fill_gc_id, txn->tw.last_reclaimed); - goto retry; - } - } else { - mdbx_tassert(txn, lifo != 0); - if (++filled_gc_slot > - (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)) { - mdbx_notice("** restart: reserve depleted (filled_gc_slot %u > " - "lifo_reclaimed %u" PRIaTXN, - filled_gc_slot, - (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); - goto retry; - } - fill_gc_id = txn->tw.lifo_reclaimed[filled_gc_slot]; - mdbx_trace("%s.seek-reservation @%" PRIaTXN " at lifo_reclaimed[%u]", - dbg_prefix_mode, fill_gc_id, filled_gc_slot); - key.iov_base = &fill_gc_id; - key.iov_len = sizeof(fill_gc_id); - rc = mdbx_cursor_get(&mc, &key, &data, MDBX_SET_KEY); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - mdbx_tassert(txn, cleaned_gc_slot == - (txn->tw.lifo_reclaimed - ? MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - : 0)); - mdbx_tassert(txn, fill_gc_id > 0 && fill_gc_id < *env->me_oldest); - key.iov_base = &fill_gc_id; - key.iov_len = sizeof(fill_gc_id); - - mdbx_tassert(txn, data.iov_len >= sizeof(pgno_t) * 2); - mc.mc_flags |= C_GCFREEZE; - unsigned chunk = (unsigned)(data.iov_len / sizeof(pgno_t)) - 1; - if (unlikely(chunk > left)) { - mdbx_trace("%s: chunk %u > left %u, @%" PRIaTXN, dbg_prefix_mode, chunk, - left, fill_gc_id); - if ((loop < 5 && chunk - left > loop / 2) || - chunk - left > env->me_maxgc_ov1page) { - data.iov_len = (left + 1) * sizeof(pgno_t); - if (loop < 7) - mc.mc_flags &= ~C_GCFREEZE; - } - chunk = left; - } - rc = mdbx_cursor_put(&mc, &key, &data, MDBX_CURRENT | MDBX_RESERVE); - mc.mc_flags &= ~C_GCFREEZE; - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - clean_reserved_gc_pnl(env, data); - - if (unlikely(txn->tw.loose_count || - amount != MDBX_PNL_SIZE(txn->tw.reclaimed_pglist))) { - mdbx_notice("** restart: reclaimed-list changed (%u -> %u, %u)", amount, - MDBX_PNL_SIZE(txn->tw.reclaimed_pglist), - txn->tw.loose_count); - goto retry; - } - if (unlikely(txn->tw.lifo_reclaimed - ? cleaned_gc_slot < MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - : cleaned_gc_id < txn->tw.last_reclaimed)) { - mdbx_notice("%s", "** restart: reclaimed-slots changed"); - goto retry; - } - - pgno_t *dst = data.iov_base; - *dst++ = chunk; - pgno_t *src = MDBX_PNL_BEGIN(txn->tw.reclaimed_pglist) + left - chunk; - memcpy(dst, src, chunk * sizeof(pgno_t)); - pgno_t *from = src, *to = src + chunk; - mdbx_trace("%s.fill: %u [ %u:%" PRIaPGNO "...%u:%" PRIaPGNO - "] @%" PRIaTXN, - dbg_prefix_mode, chunk, - (unsigned)(from - txn->tw.reclaimed_pglist), from[0], - (unsigned)(to - txn->tw.reclaimed_pglist), to[-1], fill_gc_id); - - left -= chunk; - if (mdbx_audit_enabled()) { - rc = mdbx_audit_ex(txn, retired_stored + amount - left, true); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - if (left == 0) { - rc = MDBX_SUCCESS; - break; - } - - if (txn->tw.lifo_reclaimed == nullptr) { - mdbx_tassert(txn, lifo == 0); - rc = mdbx_cursor_next(&mc, &key, &data, MDBX_NEXT); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } else { - mdbx_tassert(txn, lifo != 0); - } - } - } - - mdbx_tassert(txn, rc == MDBX_SUCCESS); - if (unlikely(txn->tw.loose_count != 0 || - filled_gc_slot != - (txn->tw.lifo_reclaimed - ? (unsigned)MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - : 0))) { - mdbx_notice("** restart: reserve excess (filled-slot %u, loose-count %u)", - filled_gc_slot, txn->tw.loose_count); - goto retry; - } - - mdbx_tassert(txn, - txn->tw.lifo_reclaimed == NULL || - cleaned_gc_slot == MDBX_PNL_SIZE(txn->tw.lifo_reclaimed)); - -bailout: - txn->mt_cursors[FREE_DBI] = mc.mc_next; - -bailout_notracking: - MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) = 0; - mdbx_trace("<<< %u loops, rc = %d", loop, rc); - return rc; -} - -static int mdbx_flush_iov(MDBX_txn *const txn, struct iovec *iov, - unsigned iov_items, size_t iov_off, - size_t iov_bytes) { - MDBX_env *const env = txn->mt_env; - int rc = mdbx_pwritev(env->me_lazy_fd, iov, iov_items, iov_off, iov_bytes); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_error("Write error: %s", mdbx_strerror(rc)); - txn->mt_flags |= MDBX_TXN_ERROR; - } - - for (unsigned i = 0; i < iov_items; i++) - mdbx_dpage_free(env, (MDBX_page *)iov[i].iov_base, - bytes2pgno(env, iov[i].iov_len)); - - return rc; -} - -/* Flush (some) dirty pages to the map, after clearing their dirty flag. - * [in] txn the transaction that's being committed - * [in] keep number of initial pages in dirtylist to keep dirty. - * Returns 0 on success, non-zero on failure. */ -__hot static int mdbx_page_flush(MDBX_txn *txn, const unsigned keep) { - struct iovec iov[MDBX_COMMIT_PAGES]; - const MDBX_DPL dl = (keep || txn->tw.loose_count > 1) - ? mdbx_dpl_sort(txn->tw.dirtylist) - : txn->tw.dirtylist; - MDBX_env *const env = txn->mt_env; - pgno_t flush_begin = MAX_PAGENO; - pgno_t flush_end = MIN_PAGENO; - unsigned iov_items = 0; - size_t iov_bytes = 0; - size_t iov_off = 0; - unsigned r, w; - for (r = w = keep; ++r <= dl->length;) { - MDBX_page *dp = dl[r].ptr; - mdbx_tassert(txn, - dp->mp_pgno >= MIN_PAGENO && dp->mp_pgno < txn->mt_next_pgno); - mdbx_tassert(txn, dp->mp_flags & P_DIRTY); - - /* Don't flush this page yet */ - if (dp->mp_flags & P_KEEP) { - dp->mp_flags &= ~P_KEEP; - dl[++w] = dl[r]; - continue; - } - if (dp->mp_flags & P_LOOSE) { - dl[++w] = dl[r]; - continue; - } - - const unsigned npages = IS_OVERFLOW(dp) ? dp->mp_pages : 1; - flush_begin = (flush_begin < dp->mp_pgno) ? flush_begin : dp->mp_pgno; - flush_end = - (flush_end > dp->mp_pgno + npages) ? flush_end : dp->mp_pgno + npages; - *env->me_unsynced_pages += npages; - dp->mp_flags &= ~P_DIRTY; - dp->mp_txnid = txn->mt_txnid; - - if ((env->me_flags & MDBX_WRITEMAP) == 0) { - const size_t size = pgno2bytes(env, npages); - if (iov_off + iov_bytes != pgno2bytes(env, dp->mp_pgno) || - iov_items == ARRAY_LENGTH(iov) || iov_bytes + size > MAX_WRITE) { - if (iov_items) { - int rc = mdbx_flush_iov(txn, iov, iov_items, iov_off, iov_bytes); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; -#if defined(__linux__) || defined(__gnu_linux__) - if (mdbx_linux_kernel_version >= 0x02060b00) - /* Linux kernels older than version 2.6.11 ignore the addr and nbytes - * arguments, making this function fairly expensive. Therefore, the - * whole cache is always flushed. */ -#endif /* Linux */ - mdbx_flush_incoherent_mmap(env->me_map + iov_off, iov_bytes, - env->me_os_psize); - iov_items = 0; - iov_bytes = 0; - } - iov_off = pgno2bytes(env, dp->mp_pgno); - } - iov[iov_items].iov_base = (void *)dp; - iov[iov_items].iov_len = size; - iov_items += 1; - iov_bytes += size; - } - } - - if (iov_items) { - int rc = mdbx_flush_iov(txn, iov, iov_items, iov_off, iov_bytes); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - -#if defined(__linux__) || defined(__gnu_linux__) - if ((env->me_flags & MDBX_WRITEMAP) == 0 && - mdbx_linux_kernel_version < 0x02060b00) - /* Linux kernels older than version 2.6.11 ignore the addr and nbytes - * arguments, making this function fairly expensive. Therefore, the - * whole cache is always flushed. */ - mdbx_flush_incoherent_mmap(env->me_map + pgno2bytes(env, flush_begin), - pgno2bytes(env, flush_end - flush_begin), - env->me_os_psize); -#endif /* Linux */ - - /* TODO: use flush_begin & flush_end for msync() & sync_file_range(). */ - (void)flush_begin; - (void)flush_end; - - txn->tw.dirtyroom += r - 1 - w; - dl->length = w; - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - return MDBX_SUCCESS; -} - -/* Check for misused dbi handles */ -#define TXN_DBI_CHANGED(txn, dbi) \ - ((txn)->mt_dbiseqs[dbi] != (txn)->mt_env->me_dbiseqs[dbi]) - -/* Import DBI which opened after txn started into context */ -static __cold bool mdbx_txn_import_dbi(MDBX_txn *txn, MDBX_dbi dbi) { - MDBX_env *env = txn->mt_env; - if (dbi < CORE_DBS || dbi >= env->me_numdbs) - return false; - - mdbx_ensure(env, mdbx_fastmutex_acquire(&env->me_dbi_lock) == MDBX_SUCCESS); - const unsigned snap_numdbs = env->me_numdbs; - mdbx_compiler_barrier(); - for (unsigned i = CORE_DBS; i < snap_numdbs; ++i) { - if (i >= txn->mt_numdbs) - txn->mt_dbflags[i] = 0; - if (!(txn->mt_dbflags[i] & DB_USRVALID) && - (env->me_dbflags[i] & MDBX_VALID)) { - txn->mt_dbs[i].md_flags = env->me_dbflags[i] & PERSISTENT_FLAGS; - txn->mt_dbflags[i] = DB_VALID | DB_USRVALID | DB_STALE; - mdbx_tassert(txn, txn->mt_dbxs[i].md_cmp != NULL); - } - } - txn->mt_numdbs = snap_numdbs; - - mdbx_ensure(env, mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); - return txn->mt_dbflags[dbi] & DB_USRVALID; -} - -/* Check txn and dbi arguments to a function */ -static __always_inline bool mdbx_txn_dbi_exists(MDBX_txn *txn, MDBX_dbi dbi, - unsigned validity) { - if (likely(dbi < txn->mt_numdbs && (txn->mt_dbflags[dbi] & validity))) - return true; - - return mdbx_txn_import_dbi(txn, dbi); -} - -int mdbx_txn_commit(MDBX_txn *txn) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - MDBX_env *env = txn->mt_env; -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_TXN_CHECKPID */ - - /* mdbx_txn_end() mode for a commit which writes nothing */ - unsigned end_mode = - MDBX_END_EMPTY_COMMIT | MDBX_END_UPDATE | MDBX_END_SLOT | MDBX_END_FREE; - if (unlikely(F_ISSET(txn->mt_flags, MDBX_RDONLY))) - goto done; - - if (txn->mt_child) { - rc = mdbx_txn_commit(txn->mt_child); - mdbx_tassert(txn, txn->mt_child == NULL); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - - if (unlikely(txn != env->me_txn)) { - mdbx_debug("%s", "attempt to commit unknown transaction"); - rc = MDBX_EINVAL; - goto fail; - } - - if (txn->mt_parent) { - MDBX_txn *const parent = txn->mt_parent; - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - - /* Preserve space for spill list to avoid parent's state corruption - * if allocation fails. */ - if (txn->tw.spill_pages && parent->tw.spill_pages) { - rc = mdbx_pnl_need(&parent->tw.spill_pages, - MDBX_PNL_SIZE(txn->tw.spill_pages)); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - - //------------------------------------------------------------------------- - - parent->tw.lifo_reclaimed = txn->tw.lifo_reclaimed; - txn->tw.lifo_reclaimed = NULL; - - parent->tw.retired_pages = txn->tw.retired_pages; - txn->tw.retired_pages = NULL; - - mdbx_pnl_free(parent->tw.reclaimed_pglist); - parent->tw.reclaimed_pglist = txn->tw.reclaimed_pglist; - txn->tw.reclaimed_pglist = NULL; - parent->tw.last_reclaimed = txn->tw.last_reclaimed; - - parent->mt_geo = txn->mt_geo; - parent->mt_canary = txn->mt_canary; - parent->mt_flags |= txn->mt_flags & MDBX_TXN_DIRTY; - - /* Merge our cursors into parent's and close them */ - mdbx_cursors_eot(txn, 1); - - /* Update parent's DB table. */ - memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDBX_db)); - parent->mt_numdbs = txn->mt_numdbs; - parent->mt_dbflags[FREE_DBI] = txn->mt_dbflags[FREE_DBI]; - parent->mt_dbflags[MAIN_DBI] = txn->mt_dbflags[MAIN_DBI]; - for (unsigned i = CORE_DBS; i < txn->mt_numdbs; i++) { - /* preserve parent's DB_NEW status */ - parent->mt_dbflags[i] = - txn->mt_dbflags[i] | (parent->mt_dbflags[i] & (DB_CREAT | DB_FRESH)); - } - - /* Remove refunded pages from parent's dirty & spill lists */ - MDBX_DPL dst = mdbx_dpl_sort(parent->tw.dirtylist); - while (dst->length && dst[dst->length].pgno >= parent->mt_next_pgno) { - MDBX_page *mp = dst[dst->length].ptr; - if (mp && (txn->mt_env->me_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(txn->mt_env, mp, IS_OVERFLOW(mp) ? mp->mp_pages : 1); - dst->length -= 1; - } - parent->tw.dirtyroom += dst->sorted - dst->length; - dst->sorted = dst->length; - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - - if (parent->tw.spill_pages && MDBX_PNL_SIZE(parent->tw.spill_pages) > 0 && - MDBX_PNL_MOST(parent->tw.spill_pages) >= parent->mt_next_pgno << 1) { - const MDBX_PNL ps = parent->tw.spill_pages; -#if MDBX_PNL_ASCENDING - unsigned i = MDBX_PNL_SIZE(ps); - assert(MDBX_PNL_MOST(ps) == MDBX_PNL_LAST(ps)); - do - i -= 1; - while (i && ps[i] >= parent->mt_next_pgno << 1); - MDBX_PNL_SIZE(ps) = i; -#else - assert(MDBX_PNL_MOST(ps) == MDBX_PNL_FIRST(ps)); - unsigned i = 1, len = MDBX_PNL_SIZE(ps); - while (i < len && ps[i + 1] >= parent->mt_next_pgno << 1) - ++i; - MDBX_PNL_SIZE(ps) = len -= i; - for (unsigned k = 1; k <= len; ++k) - ps[k] = ps[k + i]; -#endif - } - - /* Remove anything in our dirty list from parent's spill list */ - MDBX_DPL src = mdbx_dpl_sort(txn->tw.dirtylist); - if (likely(src->length > 0) && parent->tw.spill_pages && - MDBX_PNL_SIZE(parent->tw.spill_pages) > 0) { - MDBX_PNL sp = parent->tw.spill_pages; - assert(mdbx_pnl_check4assert(sp, txn->mt_next_pgno)); - - const unsigned len = MDBX_PNL_SIZE(parent->tw.spill_pages); - MDBX_PNL_SIZE(sp) = ~(pgno_t)0; - - /* Mark our dirty pages as deleted in parent spill list */ - unsigned r, w, i = 1; - w = r = len; - do { - pgno_t pn = src[i].pgno << 1; - while (pn > sp[r]) - r--; - if (pn == sp[r]) { - sp[r] = 1; - w = --r; - } - } while (++i <= src->length); - - /* Squash deleted pagenums if we deleted any */ - for (r = w; ++r <= len;) - if ((sp[r] & 1) == 0) - sp[++w] = sp[r]; - MDBX_PNL_SIZE(sp) = w; - assert(mdbx_pnl_check4assert(sp, txn->mt_next_pgno << 1)); - } - - /* Remove anything in our spill list from parent's dirty list */ - if (txn->tw.spill_pages && MDBX_PNL_SIZE(txn->tw.spill_pages) > 0) { - const MDBX_PNL sp = txn->tw.spill_pages; - mdbx_pnl_sort(sp); - /* Scanning in ascend order */ - const int step = MDBX_PNL_ASCENDING ? 1 : -1; - const int begin = MDBX_PNL_ASCENDING ? 1 : MDBX_PNL_SIZE(sp); - const int end = MDBX_PNL_ASCENDING ? MDBX_PNL_SIZE(sp) + 1 : 0; - mdbx_tassert(txn, sp[begin] <= sp[end - step]); - - unsigned r, w = r = mdbx_dpl_search(dst, sp[begin] >> 1); - mdbx_tassert(txn, dst->sorted == dst->length); - for (int i = begin; r <= dst->length;) { - mdbx_tassert(txn, (sp[i] & 1) == 0); - const pgno_t pgno = sp[i] >> 1; - if (dst[r].pgno < pgno) { - dst[w++] = dst[r++]; - } else if (dst[r].pgno > pgno) { - i += step; - if (i == end) - while (r <= dst->length) - dst[w++] = dst[r++]; - } else { - MDBX_page *dp = dst[r++].ptr; - if ((env->me_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(env, dp, IS_OVERFLOW(dp) ? dp->mp_pages : 1); - } - } - mdbx_tassert(txn, r == dst->length + 1); - dst->length = w; - parent->tw.dirtyroom += r - w; - } - assert(dst->sorted == dst->length); - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - - unsigned d, s, l; - /* Find length of merging our dirty list with parent's */ - for (l = 0, d = dst->length, s = src->length; d > 0 && s > 0; ++l) { - const pgno_t s_pgno = src[s].pgno; - const pgno_t d_pgno = dst[d].pgno; - d -= d_pgno >= s_pgno; - s -= d_pgno <= s_pgno; - } - assert(dst->sorted == dst->length); - dst->sorted = l += d + s; - assert(dst->sorted >= dst->length); - parent->tw.dirtyroom -= dst->sorted - dst->length; - - /* Merge our dirty list into parent's */ - for (d = dst->length, s = src->length; d > 0 && s > 0; --l) { - if (dst[d].pgno > src[s].pgno) - dst[l] = dst[d--]; - else if (dst[d].pgno < src[s].pgno) - dst[l] = src[s--]; - else { - MDBX_page *dp = dst[d--].ptr; - if (dp && (env->me_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(env, dp, IS_OVERFLOW(dp) ? dp->mp_pgno : 1); - dst[l] = src[s--]; - } - } - if (s) { - do - dst[l--] = src[s--]; - while (s > 0); - } else if (d) { - do - dst[l--] = dst[d--]; - while (d > 0); - } - assert(l == 0); - dst->length = dst->sorted; - mdbx_free(txn->tw.dirtylist); - txn->tw.dirtylist = nullptr; - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - - if (txn->tw.spill_pages) { - if (parent->tw.spill_pages) { - /* Must not fail since space was preserved above. */ - rc = mdbx_pnl_append_list(&parent->tw.spill_pages, txn->tw.spill_pages); - mdbx_assert(env, rc == MDBX_SUCCESS); - (void)rc; - mdbx_pnl_free(txn->tw.spill_pages); - mdbx_pnl_sort(parent->tw.spill_pages); - } else { - parent->tw.spill_pages = txn->tw.spill_pages; - } - } - - parent->mt_flags &= ~(MDBX_TXN_SPILLS | MDBX_TXN_HAS_CHILD); - if (parent->tw.spill_pages) { - assert(mdbx_pnl_check4assert(parent->tw.spill_pages, - parent->mt_next_pgno << 1)); - if (MDBX_PNL_SIZE(parent->tw.spill_pages)) - parent->mt_flags |= MDBX_TXN_SPILLS; - } - - /* Append our loose page list to parent's */ - if (txn->tw.loose_pages) { - MDBX_page **lp = &parent->tw.loose_pages; - while (*lp) - lp = &(*lp)->mp_next; - *lp = txn->tw.loose_pages; - parent->tw.loose_count += txn->tw.loose_count; - } - if (txn->tw.retired2parent_pages) { - MDBX_page *mp = txn->tw.retired2parent_pages; - do { - MDBX_page *next = mp->mp_next; - rc = mdbx_page_loose(parent, mp); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - mp = next; - } while (mp); - } - - env->me_txn = parent; - parent->mt_child = NULL; - txn->mt_signature = 0; - mdbx_free(txn); - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - - /* Scan parent's loose page for suitable for refund */ - for (MDBX_page *mp = parent->tw.loose_pages; mp; mp = mp->mp_next) { - if (mp->mp_pgno == parent->mt_next_pgno - 1) { - mdbx_refund(parent); - break; - } - } - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - return MDBX_SUCCESS; - } - - mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - mdbx_cursors_eot(txn, 0); - end_mode |= MDBX_END_EOTDONE; - - if (txn->tw.dirtylist->length == 0 && - (txn->mt_flags & (MDBX_TXN_DIRTY | MDBX_TXN_SPILLS)) == 0) { - for (int i = txn->mt_numdbs; --i >= 0;) - mdbx_tassert(txn, (txn->mt_dbflags[i] & DB_DIRTY) == 0); - rc = MDBX_SUCCESS; - goto done; - } - - mdbx_debug("committing txn %" PRIaTXN " %p on mdbenv %p, root page %" PRIaPGNO - "/%" PRIaPGNO, - txn->mt_txnid, (void *)txn, (void *)env, - txn->mt_dbs[MAIN_DBI].md_root, txn->mt_dbs[FREE_DBI].md_root); - - /* Update DB root pointers */ - if (txn->mt_numdbs > CORE_DBS) { - MDBX_cursor mc; - MDBX_val data; - data.iov_len = sizeof(MDBX_db); - - rc = mdbx_cursor_init(&mc, txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - for (MDBX_dbi i = CORE_DBS; i < txn->mt_numdbs; i++) { - if (txn->mt_dbflags[i] & DB_DIRTY) { - if (unlikely(TXN_DBI_CHANGED(txn, i))) { - rc = MDBX_BAD_DBI; - goto fail; - } - MDBX_db *db = &txn->mt_dbs[i]; - db->md_mod_txnid = txn->mt_txnid; - data.iov_base = db; - WITH_CURSOR_TRACKING(mc, - rc = mdbx_cursor_put(&mc, &txn->mt_dbxs[i].md_name, - &data, F_SUBDATA)); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - } - } - - rc = mdbx_update_gc(txn); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - - if (mdbx_audit_enabled()) { - rc = mdbx_audit_ex(txn, MDBX_PNL_SIZE(txn->tw.retired_pages), true); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - - rc = mdbx_page_flush(txn, 0); - if (likely(rc == MDBX_SUCCESS)) { - if (txn->mt_dbs[MAIN_DBI].md_flags & DB_DIRTY) - txn->mt_dbs[MAIN_DBI].md_mod_txnid = txn->mt_txnid; - - MDBX_meta meta, *head = mdbx_meta_head(env); - meta.mm_magic_and_version = head->mm_magic_and_version; - meta.mm_extra_flags = head->mm_extra_flags; - meta.mm_validator_id = head->mm_validator_id; - meta.mm_extra_pagehdr = head->mm_extra_pagehdr; - meta.mm_pages_retired = - head->mm_pages_retired + MDBX_PNL_SIZE(txn->tw.retired_pages); - - meta.mm_geo = txn->mt_geo; - meta.mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI]; - meta.mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI]; - meta.mm_canary = txn->mt_canary; - mdbx_meta_set_txnid(env, &meta, txn->mt_txnid); - - rc = mdbx_sync_locked( - env, env->me_flags | txn->mt_flags | MDBX_SHRINK_ALLOWED, &meta); - } - if (unlikely(rc != MDBX_SUCCESS)) { - env->me_flags |= MDBX_FATAL_ERROR; - goto fail; - } - - end_mode = MDBX_END_COMMITTED | MDBX_END_UPDATE | MDBX_END_EOTDONE; - -done: - return mdbx_txn_end(txn, end_mode); - -fail: - mdbx_txn_abort(txn); - return rc; -} - -static int __cold mdbx_validate_meta(MDBX_env *env, MDBX_meta *const meta, - uint64_t *filesize, - const MDBX_page *const page, - const unsigned meta_number, - MDBX_meta *dest, - const unsigned guess_pagesize) { - if (meta->mm_magic_and_version != MDBX_DATA_MAGIC && - meta->mm_magic_and_version != MDBX_DATA_MAGIC_DEVEL) { - mdbx_error("meta[%u] has invalid magic/version %" PRIx64, meta_number, - meta->mm_magic_and_version); - return ((meta->mm_magic_and_version >> 8) != MDBX_MAGIC) - ? MDBX_INVALID - : MDBX_VERSION_MISMATCH; - } - - if (page->mp_pgno != meta_number) { - mdbx_error("meta[%u] has invalid pageno %" PRIaPGNO, meta_number, - page->mp_pgno); - return MDBX_INVALID; - } - - if (page->mp_flags != P_META) { - mdbx_error("page #%u not a meta-page", meta_number); - return MDBX_INVALID; - } - - /* LY: check pagesize */ - if (!is_powerof2(meta->mm_psize) || meta->mm_psize < MIN_PAGESIZE || - meta->mm_psize > MAX_PAGESIZE) { - mdbx_notice("meta[%u] has invalid pagesize (%u), skip it", meta_number, - meta->mm_psize); - return is_powerof2(meta->mm_psize) ? MDBX_VERSION_MISMATCH : MDBX_INVALID; - } - - if (dest && meta_number == 0 && guess_pagesize != meta->mm_psize) { - dest->mm_psize = meta->mm_psize; - mdbx_verbose("meta[%u] took pagesize %u", meta_number, meta->mm_psize); - } - - if (safe64_read(&meta->mm_txnid_a) != safe64_read(&meta->mm_txnid_b)) { - mdbx_warning("meta[%u] not completely updated, skip it", meta_number); - return MDBX_RESULT_TRUE; - } - - /* LY: check signature as a checksum */ - if (META_IS_STEADY(meta) && meta->mm_datasync_sign != mdbx_meta_sign(meta)) { - mdbx_notice("meta[%u] has invalid steady-checksum (0x%" PRIx64 - " != 0x%" PRIx64 "), skip it", - meta_number, meta->mm_datasync_sign, mdbx_meta_sign(meta)); - return MDBX_RESULT_TRUE; - } - - mdbx_debug("read meta%" PRIaPGNO " = root %" PRIaPGNO "/%" PRIaPGNO - ", geo %" PRIaPGNO "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO - " +%u -%u, txn_id %" PRIaTXN ", %s", - page->mp_pgno, meta->mm_dbs[MAIN_DBI].md_root, - meta->mm_dbs[FREE_DBI].md_root, meta->mm_geo.lower, - meta->mm_geo.next, meta->mm_geo.now, meta->mm_geo.upper, - meta->mm_geo.grow, meta->mm_geo.shrink, - meta->mm_txnid_a.inconsistent, mdbx_durable_str(meta)); - - /* LY: check min-pages value */ - if (meta->mm_geo.lower < MIN_PAGENO || meta->mm_geo.lower > MAX_PAGENO) { - mdbx_notice("meta[%u] has invalid min-pages (%" PRIaPGNO "), skip it", - meta_number, meta->mm_geo.lower); - return MDBX_INVALID; - } - - /* LY: check max-pages value */ - if (meta->mm_geo.upper < MIN_PAGENO || meta->mm_geo.upper > MAX_PAGENO || - meta->mm_geo.upper < meta->mm_geo.lower) { - mdbx_notice("meta[%u] has invalid max-pages (%" PRIaPGNO "), skip it", - meta_number, meta->mm_geo.upper); - return MDBX_INVALID; - } - - /* LY: check last_pgno */ - if (meta->mm_geo.next < MIN_PAGENO || meta->mm_geo.next - 1 > MAX_PAGENO) { - mdbx_notice("meta[%u] has invalid next-pageno (%" PRIaPGNO "), skip it", - meta_number, meta->mm_geo.next); - return MDBX_CORRUPTED; - } - - /* LY: check filesize & used_bytes */ - const uint64_t used_bytes = meta->mm_geo.next * (uint64_t)meta->mm_psize; - if (used_bytes > *filesize) { - /* Here could be a race with DB-shrinking performed by other process */ - int err = mdbx_filesize(env->me_lazy_fd, filesize); - if (unlikely(err != MDBX_SUCCESS)) - return err; - if (used_bytes > *filesize) { - mdbx_notice("meta[%u] used-bytes (%" PRIu64 ") beyond filesize (%" PRIu64 - "), skip it", - meta_number, used_bytes, *filesize); - return MDBX_CORRUPTED; - } - } - - /* LY: check mapsize limits */ - const uint64_t mapsize_min = meta->mm_geo.lower * (uint64_t)meta->mm_psize; - STATIC_ASSERT(MAX_MAPSIZE < PTRDIFF_MAX - MAX_PAGESIZE); - STATIC_ASSERT(MIN_MAPSIZE < MAX_MAPSIZE); - if (mapsize_min < MIN_MAPSIZE || mapsize_min > MAX_MAPSIZE) { - mdbx_notice("meta[%u] has invalid min-mapsize (%" PRIu64 "), skip it", - meta_number, mapsize_min); - return MDBX_VERSION_MISMATCH; - } - - const uint64_t mapsize_max = meta->mm_geo.upper * (uint64_t)meta->mm_psize; - STATIC_ASSERT(MIN_MAPSIZE < MAX_MAPSIZE); - if (mapsize_max > MAX_MAPSIZE || - MAX_PAGENO < roundup_powerof2((size_t)mapsize_max, env->me_os_psize) / - (size_t)meta->mm_psize) { - if (meta->mm_geo.next - 1 > MAX_PAGENO || used_bytes > MAX_MAPSIZE) { - mdbx_notice("meta[%u] has too large max-mapsize (%" PRIu64 "), skip it", - meta_number, mapsize_max); - return MDBX_TOO_LARGE; - } - - /* allow to open large DB from a 32-bit environment */ - mdbx_notice("meta[%u] has too large max-mapsize (%" PRIu64 "), " - "but size of used space still acceptable (%" PRIu64 ")", - meta_number, mapsize_max, used_bytes); - meta->mm_geo.upper = (pgno_t)(MAX_MAPSIZE / meta->mm_psize); - } - - /* LY: check and silently put mm_geo.now into [geo.lower...geo.upper]. - * - * Copy-with-compaction by previous version of libmdbx could produce DB-file - * less than meta.geo.lower bound, in case actual filling is low or no data - * at all. This is not a problem as there is no damage or loss of data. - * Therefore it is better not to consider such situation as an error, but - * silently correct it. */ - if (meta->mm_geo.now < meta->mm_geo.lower) - meta->mm_geo.now = meta->mm_geo.lower; - if (meta->mm_geo.now > meta->mm_geo.upper && - meta->mm_geo.next <= meta->mm_geo.upper) - meta->mm_geo.now = meta->mm_geo.upper; - - if (meta->mm_geo.next > meta->mm_geo.now) { - mdbx_notice("meta[%u] next-pageno (%" PRIaPGNO - ") is beyond end-pgno (%" PRIaPGNO "), skip it", - meta_number, meta->mm_geo.next, meta->mm_geo.now); - return MDBX_CORRUPTED; - } - - /* LY: GC root */ - if (meta->mm_dbs[FREE_DBI].md_root == P_INVALID) { - if (meta->mm_dbs[FREE_DBI].md_branch_pages || - meta->mm_dbs[FREE_DBI].md_depth || meta->mm_dbs[FREE_DBI].md_entries || - meta->mm_dbs[FREE_DBI].md_leaf_pages || - meta->mm_dbs[FREE_DBI].md_overflow_pages) { - mdbx_notice("meta[%u] has false-empty GC, skip it", meta_number); - return MDBX_CORRUPTED; - } - } else if (meta->mm_dbs[FREE_DBI].md_root >= meta->mm_geo.next) { - mdbx_notice("meta[%u] has invalid GC-root %" PRIaPGNO ", skip it", - meta_number, meta->mm_dbs[FREE_DBI].md_root); - return MDBX_CORRUPTED; - } - - /* LY: MainDB root */ - if (meta->mm_dbs[MAIN_DBI].md_root == P_INVALID) { - if (meta->mm_dbs[MAIN_DBI].md_branch_pages || - meta->mm_dbs[MAIN_DBI].md_depth || meta->mm_dbs[MAIN_DBI].md_entries || - meta->mm_dbs[MAIN_DBI].md_leaf_pages || - meta->mm_dbs[MAIN_DBI].md_overflow_pages) { - mdbx_notice("meta[%u] has false-empty maindb", meta_number); - return MDBX_CORRUPTED; - } - } else if (meta->mm_dbs[MAIN_DBI].md_root >= meta->mm_geo.next) { - mdbx_notice("meta[%u] has invalid maindb-root %" PRIaPGNO ", skip it", - meta_number, meta->mm_dbs[MAIN_DBI].md_root); - return MDBX_CORRUPTED; - } - - if (safe64_read(&meta->mm_txnid_a) == 0) { - mdbx_warning("meta[%u] has zero txnid, skip it", meta_number); - return MDBX_RESULT_TRUE; - } - - return MDBX_SUCCESS; -} - -/* Read the environment parameters of a DB environment - * before mapping it into memory. */ -static int __cold mdbx_read_header(MDBX_env *env, MDBX_meta *dest, - uint64_t *filesize, - const int lck_exclusive) { - int rc = mdbx_filesize(env->me_lazy_fd, filesize); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - memset(dest, 0, sizeof(MDBX_meta)); - dest->mm_datasync_sign = MDBX_DATASIGN_WEAK; - rc = MDBX_CORRUPTED; - - /* Read twice all meta pages so we can find the latest one. */ - unsigned loop_limit = NUM_METAS * 2; - for (unsigned loop_count = 0; loop_count < loop_limit; ++loop_count) { - /* We don't know the page size on first time. - * So, just guess it. */ - unsigned guess_pagesize = dest->mm_psize; - if (guess_pagesize == 0) - guess_pagesize = - (loop_count > NUM_METAS) ? env->me_psize : env->me_os_psize; - - const unsigned meta_number = loop_count % NUM_METAS; - const unsigned offset = guess_pagesize * meta_number; - - char buffer[MIN_PAGESIZE]; - unsigned retryleft = 42; - while (1) { - mdbx_trace("reading meta[%d]: offset %u, bytes %u, retry-left %u", - meta_number, offset, MIN_PAGESIZE, retryleft); - int err = mdbx_pread(env->me_lazy_fd, buffer, MIN_PAGESIZE, offset); - if (err != MDBX_SUCCESS) { - if (err == MDBX_ENODATA && offset == 0 && loop_count == 0 && - *filesize == 0 && (env->me_flags & MDBX_RDONLY) == 0) - mdbx_notice("read meta: empty file (%d, %s)", err, - mdbx_strerror(err)); - else - mdbx_error("read meta[%u,%u]: %i, %s", offset, MIN_PAGESIZE, err, - mdbx_strerror(err)); - return err; - } - - char again[MIN_PAGESIZE]; - err = mdbx_pread(env->me_lazy_fd, again, MIN_PAGESIZE, offset); - if (err != MDBX_SUCCESS) { - mdbx_error("read meta[%u,%u]: %i, %s", offset, MIN_PAGESIZE, err, - mdbx_strerror(err)); - return err; - } - - if (memcmp(buffer, again, MIN_PAGESIZE) == 0 || --retryleft == 0) - break; - - mdbx_verbose("meta[%u] was updated, re-read it", meta_number); - } - - if (!retryleft) { - mdbx_error("meta[%u] is too volatile, skip it", meta_number); - continue; - } - - MDBX_page *const page = (MDBX_page *)buffer; - MDBX_meta *const meta = page_meta(page); - rc = mdbx_validate_meta(env, meta, filesize, page, meta_number, dest, - guess_pagesize); - if (rc != MDBX_SUCCESS) - continue; - - if (mdbx_meta_ot(prefer_steady, env, dest, meta)) { - *dest = *meta; - if (!META_IS_STEADY(dest)) - loop_limit += 1; /* LY: should re-read to hush race with update */ - mdbx_verbose("latch meta[%u]", meta_number); - } - } - - if (dest->mm_psize == 0 || - (!META_IS_STEADY(dest) && - !meta_weak_acceptable(env, dest, lck_exclusive))) { - mdbx_error("%s", "no usable meta-pages, database is corrupted"); - return rc; - } - - return MDBX_SUCCESS; -} - -static MDBX_page *__cold mdbx_meta_model(const MDBX_env *env, MDBX_page *model, - unsigned num) { - - mdbx_ensure(env, is_powerof2(env->me_psize)); - mdbx_ensure(env, env->me_psize >= MIN_PAGESIZE); - mdbx_ensure(env, env->me_psize <= MAX_PAGESIZE); - mdbx_ensure(env, env->me_dbgeo.lower >= MIN_MAPSIZE); - mdbx_ensure(env, env->me_dbgeo.upper <= MAX_MAPSIZE); - mdbx_ensure(env, env->me_dbgeo.now >= env->me_dbgeo.lower); - mdbx_ensure(env, env->me_dbgeo.now <= env->me_dbgeo.upper); - - memset(model, 0, sizeof(*model)); - model->mp_pgno = num; - model->mp_flags = P_META; - MDBX_meta *const model_meta = page_meta(model); - model_meta->mm_magic_and_version = MDBX_DATA_MAGIC; - - model_meta->mm_geo.lower = bytes2pgno(env, env->me_dbgeo.lower); - model_meta->mm_geo.upper = bytes2pgno(env, env->me_dbgeo.upper); - model_meta->mm_geo.grow = (uint16_t)bytes2pgno(env, env->me_dbgeo.grow); - model_meta->mm_geo.shrink = (uint16_t)bytes2pgno(env, env->me_dbgeo.shrink); - model_meta->mm_geo.now = bytes2pgno(env, env->me_dbgeo.now); - model_meta->mm_geo.next = NUM_METAS; - - mdbx_ensure(env, model_meta->mm_geo.lower >= MIN_PAGENO); - mdbx_ensure(env, model_meta->mm_geo.upper <= MAX_PAGENO); - mdbx_ensure(env, model_meta->mm_geo.now >= model_meta->mm_geo.lower); - mdbx_ensure(env, model_meta->mm_geo.now <= model_meta->mm_geo.upper); - mdbx_ensure(env, model_meta->mm_geo.next >= MIN_PAGENO); - mdbx_ensure(env, model_meta->mm_geo.next <= model_meta->mm_geo.now); - mdbx_ensure(env, - model_meta->mm_geo.grow == bytes2pgno(env, env->me_dbgeo.grow)); - mdbx_ensure(env, model_meta->mm_geo.shrink == - bytes2pgno(env, env->me_dbgeo.shrink)); - - model_meta->mm_psize = env->me_psize; - model_meta->mm_flags = (uint16_t)env->me_flags; - model_meta->mm_flags |= - MDBX_INTEGERKEY; /* this is mm_dbs[FREE_DBI].md_flags */ - model_meta->mm_dbs[FREE_DBI].md_root = P_INVALID; - model_meta->mm_dbs[MAIN_DBI].md_root = P_INVALID; - mdbx_meta_set_txnid(env, model_meta, MIN_TXNID + num); - model_meta->mm_datasync_sign = mdbx_meta_sign(model_meta); - return (MDBX_page *)((uint8_t *)model + env->me_psize); -} - -/* Fill in most of the zeroed meta-pages for an empty database environment. - * Return pointer to recenly (head) meta-page. */ -static MDBX_meta *__cold mdbx_init_metas(const MDBX_env *env, void *buffer) { - MDBX_page *page0 = (MDBX_page *)buffer; - MDBX_page *page1 = mdbx_meta_model(env, page0, 0); - MDBX_page *page2 = mdbx_meta_model(env, page1, 1); - mdbx_meta_model(env, page2, 2); - mdbx_assert(env, !mdbx_meta_eq(env, page_meta(page0), page_meta(page1))); - mdbx_assert(env, !mdbx_meta_eq(env, page_meta(page1), page_meta(page2))); - mdbx_assert(env, !mdbx_meta_eq(env, page_meta(page2), page_meta(page0))); - return page_meta(page2); -} - -static int mdbx_sync_locked(MDBX_env *env, unsigned flags, - MDBX_meta *const pending) { - mdbx_assert(env, ((env->me_flags ^ flags) & MDBX_WRITEMAP) == 0); - MDBX_meta *const meta0 = METAPAGE(env, 0); - MDBX_meta *const meta1 = METAPAGE(env, 1); - MDBX_meta *const meta2 = METAPAGE(env, 2); - MDBX_meta *const head = mdbx_meta_head(env); - - mdbx_assert(env, mdbx_meta_eq_mask(env) == 0); - mdbx_assert(env, - pending < METAPAGE(env, 0) || pending > METAPAGE(env, NUM_METAS)); - mdbx_assert(env, (env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR)) == 0); - mdbx_assert(env, pending->mm_geo.next <= pending->mm_geo.now); - - if (flags & (MDBX_SAFE_NOSYNC | MDBX_MAPASYNC)) { - /* Check auto-sync conditions */ - const pgno_t autosync_threshold = *env->me_autosync_threshold; - const uint64_t autosync_period = *env->me_autosync_period; - if ((autosync_threshold && *env->me_unsynced_pages >= autosync_threshold) || - (autosync_period && - mdbx_osal_monotime() - *env->me_sync_timestamp >= autosync_period)) - flags &= MDBX_WRITEMAP | MDBX_SHRINK_ALLOWED; /* force steady */ - } - - pgno_t shrink = 0; - if (flags & MDBX_SHRINK_ALLOWED) { - /* LY: check conditions to discard unused pages */ - const pgno_t largest_pgno = mdbx_find_largest( - env, (head->mm_geo.next > pending->mm_geo.next) ? head->mm_geo.next - : pending->mm_geo.next); - mdbx_assert(env, largest_pgno >= NUM_METAS); -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - const pgno_t edge = env->me_poison_edge; - if (edge > largest_pgno) { - env->me_poison_edge = largest_pgno; - VALGRIND_MAKE_MEM_NOACCESS(env->me_map + pgno2bytes(env, largest_pgno), - pgno2bytes(env, edge - largest_pgno)); - ASAN_POISON_MEMORY_REGION(env->me_map + pgno2bytes(env, largest_pgno), - pgno2bytes(env, edge - largest_pgno)); - } -#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ -#if defined(MADV_DONTNEED) - const size_t largest_bytes = pgno2bytes(env, largest_pgno); - const size_t madvise_gap = (largest_bytes < 65536 * 256) - ? 65536 - : (largest_bytes > MEGABYTE * 4 * 256) - ? MEGABYTE * 4 - : largest_bytes >> 8; - const size_t discard_edge_bytes = bytes_align2os_bytes( - env, - (MDBX_RDONLY & (env->me_lck ? env->me_lck->mti_envmode : env->me_flags)) - ? largest_bytes - : largest_bytes + madvise_gap); - const pgno_t discard_edge_pgno = bytes2pgno(env, discard_edge_bytes); - const pgno_t prev_discarded_pgno = *env->me_discarded_tail; - if (prev_discarded_pgno > - discard_edge_pgno + - /* threshold to avoid unreasonable frequent madvise() calls */ - bytes2pgno(env, madvise_gap)) { - mdbx_notice("open-MADV_%s %u..%u", "DONTNEED", *env->me_discarded_tail, - largest_pgno); - *env->me_discarded_tail = discard_edge_pgno; - const size_t prev_discarded_bytes = - pgno2bytes(env, prev_discarded_pgno) & ~(env->me_os_psize - 1); - mdbx_ensure(env, prev_discarded_bytes > discard_edge_bytes); - int advise = MADV_DONTNEED; -#if defined(MADV_FREE) && \ - 0 /* MADV_FREE works for only anonymous vma at the moment */ - if ((env->me_flags & MDBX_WRITEMAP) && - mdbx_linux_kernel_version > 0x04050000) - advise = MADV_FREE; -#endif /* MADV_FREE */ - int err = madvise(env->me_map + discard_edge_bytes, - prev_discarded_bytes - discard_edge_bytes, advise) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } -#endif /* MADV_FREE || MADV_DONTNEED */ - - /* LY: check conditions to shrink datafile */ - const pgno_t backlog_gap = 3 + pending->mm_dbs[FREE_DBI].md_depth * 3; - if (pending->mm_geo.shrink && pending->mm_geo.now - pending->mm_geo.next > - pending->mm_geo.shrink + backlog_gap) { - if (pending->mm_geo.now > largest_pgno && - pending->mm_geo.now - largest_pgno > - pending->mm_geo.shrink + backlog_gap) { - const pgno_t aligner = pending->mm_geo.grow ? pending->mm_geo.grow - : pending->mm_geo.shrink; - const pgno_t with_backlog_gap = largest_pgno + backlog_gap; - const pgno_t aligned = pgno_align2os_pgno( - env, with_backlog_gap + aligner - with_backlog_gap % aligner); - const pgno_t bottom = - (aligned > pending->mm_geo.lower) ? aligned : pending->mm_geo.lower; - if (pending->mm_geo.now > bottom) { - if (META_IS_STEADY(mdbx_meta_steady(env))) - /* force steady, but only if steady-checkpoint is present */ - flags &= MDBX_WRITEMAP | MDBX_SHRINK_ALLOWED; - shrink = pending->mm_geo.now - bottom; - pending->mm_geo.now = bottom; - if (mdbx_meta_txnid_stable(env, head) == - pending->mm_txnid_a.inconsistent) - mdbx_meta_set_txnid( - env, pending, - safe64_txnid_next(pending->mm_txnid_a.inconsistent)); - } - } - } - } - - /* LY: step#1 - sync previously written/updated data-pages */ - int rc = *env->me_unsynced_pages ? MDBX_RESULT_TRUE /* carry non-steady */ - : MDBX_RESULT_FALSE /* carry steady */; - if (rc != MDBX_RESULT_FALSE && (flags & MDBX_SAFE_NOSYNC) == 0) { - mdbx_assert(env, ((flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); - MDBX_meta *const recent_steady_meta = mdbx_meta_steady(env); - if (flags & MDBX_WRITEMAP) { - const size_t begin = pgno2bytes(env, NUM_METAS) & ~(env->me_os_psize - 1); - const size_t end = pgno_align2os_bytes(env, pending->mm_geo.next); - if (end > begin) { - rc = mdbx_msync(&env->me_dxb_mmap, begin, end - begin, - flags & MDBX_MAPASYNC); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - rc = MDBX_RESULT_TRUE /* carry non-steady */; - if ((flags & MDBX_MAPASYNC) == 0) { - if (unlikely(pending->mm_geo.next > recent_steady_meta->mm_geo.now)) { - rc = mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_SIZE); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - rc = MDBX_RESULT_FALSE /* carry steady */; - } - } else { - rc = mdbx_filesync(env->me_lazy_fd, - (pending->mm_geo.next > recent_steady_meta->mm_geo.now) - ? MDBX_SYNC_DATA | MDBX_SYNC_SIZE - : MDBX_SYNC_DATA); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - } - - /* Steady or Weak */ - if (rc == MDBX_RESULT_FALSE /* carry steady */) { - pending->mm_datasync_sign = mdbx_meta_sign(pending); - *env->me_unsynced_pages = 0; - *env->me_sync_timestamp = mdbx_osal_monotime(); - } else { - assert(rc == MDBX_RESULT_TRUE /* carry non-steady */); - pending->mm_datasync_sign = MDBX_DATASIGN_WEAK; - } - - MDBX_meta *target = nullptr; - if (mdbx_meta_txnid_stable(env, head) == pending->mm_txnid_a.inconsistent) { - mdbx_assert(env, memcmp(&head->mm_dbs, &pending->mm_dbs, - sizeof(head->mm_dbs)) == 0); - mdbx_assert(env, memcmp(&head->mm_canary, &pending->mm_canary, - sizeof(head->mm_canary)) == 0); - mdbx_assert(env, memcmp(&head->mm_geo, &pending->mm_geo, - sizeof(pending->mm_geo)) == 0); - if (!META_IS_STEADY(head) && META_IS_STEADY(pending)) - target = head; - else { - mdbx_ensure(env, mdbx_meta_eq(env, head, pending)); - mdbx_debug("%s", "skip update meta"); - return MDBX_SUCCESS; - } - } else if (head == meta0) - target = mdbx_meta_ancient(prefer_steady, env, meta1, meta2); - else if (head == meta1) - target = mdbx_meta_ancient(prefer_steady, env, meta0, meta2); - else { - mdbx_assert(env, head == meta2); - target = mdbx_meta_ancient(prefer_steady, env, meta0, meta1); - } - - /* LY: step#2 - update meta-page. */ - mdbx_debug("writing meta%" PRIaPGNO " = root %" PRIaPGNO "/%" PRIaPGNO - ", geo %" PRIaPGNO "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO - " +%u -%u, txn_id %" PRIaTXN ", %s", - data_page(target)->mp_pgno, pending->mm_dbs[MAIN_DBI].md_root, - pending->mm_dbs[FREE_DBI].md_root, pending->mm_geo.lower, - pending->mm_geo.next, pending->mm_geo.now, pending->mm_geo.upper, - pending->mm_geo.grow, pending->mm_geo.shrink, - pending->mm_txnid_a.inconsistent, mdbx_durable_str(pending)); - - mdbx_debug("meta0: %s, %s, txn_id %" PRIaTXN ", root %" PRIaPGNO - "/%" PRIaPGNO, - (meta0 == head) ? "head" : (meta0 == target) ? "tail" : "stay", - mdbx_durable_str(meta0), mdbx_meta_txnid_fluid(env, meta0), - meta0->mm_dbs[MAIN_DBI].md_root, meta0->mm_dbs[FREE_DBI].md_root); - mdbx_debug("meta1: %s, %s, txn_id %" PRIaTXN ", root %" PRIaPGNO - "/%" PRIaPGNO, - (meta1 == head) ? "head" : (meta1 == target) ? "tail" : "stay", - mdbx_durable_str(meta1), mdbx_meta_txnid_fluid(env, meta1), - meta1->mm_dbs[MAIN_DBI].md_root, meta1->mm_dbs[FREE_DBI].md_root); - mdbx_debug("meta2: %s, %s, txn_id %" PRIaTXN ", root %" PRIaPGNO - "/%" PRIaPGNO, - (meta2 == head) ? "head" : (meta2 == target) ? "tail" : "stay", - mdbx_durable_str(meta2), mdbx_meta_txnid_fluid(env, meta2), - meta2->mm_dbs[MAIN_DBI].md_root, meta2->mm_dbs[FREE_DBI].md_root); - - mdbx_assert(env, !mdbx_meta_eq(env, pending, meta0)); - mdbx_assert(env, !mdbx_meta_eq(env, pending, meta1)); - mdbx_assert(env, !mdbx_meta_eq(env, pending, meta2)); - - mdbx_assert(env, ((env->me_flags ^ flags) & MDBX_WRITEMAP) == 0); - mdbx_ensure(env, target == head || mdbx_meta_txnid_stable(env, target) < - pending->mm_txnid_a.inconsistent); - if (flags & MDBX_WRITEMAP) { - mdbx_jitter4testing(true); - if (likely(target != head)) { - /* LY: 'invalidate' the meta. */ - mdbx_meta_update_begin(env, target, pending->mm_txnid_a.inconsistent); - target->mm_datasync_sign = MDBX_DATASIGN_WEAK; -#ifndef NDEBUG - /* debug: provoke failure to catch a violators, but don't touch mm_psize - * and mm_flags to allow readers catch actual pagesize. */ - uint8_t *provoke_begin = (uint8_t *)&target->mm_dbs[FREE_DBI].md_root; - uint8_t *provoke_end = (uint8_t *)&target->mm_datasync_sign; - memset(provoke_begin, 0xCC, provoke_end - provoke_begin); - mdbx_jitter4testing(false); -#endif - - /* LY: update info */ - target->mm_geo = pending->mm_geo; - target->mm_dbs[FREE_DBI] = pending->mm_dbs[FREE_DBI]; - target->mm_dbs[MAIN_DBI] = pending->mm_dbs[MAIN_DBI]; - target->mm_canary = pending->mm_canary; - target->mm_pages_retired = pending->mm_pages_retired; - mdbx_jitter4testing(true); - mdbx_flush_incoherent_cpu_writeback(); - - /* LY: 'commit' the meta */ - mdbx_meta_update_end(env, target, pending->mm_txnid_b.inconsistent); - mdbx_jitter4testing(true); - } else { - /* dangerous case (target == head), only mm_datasync_sign could - * me updated, check assertions once again */ - mdbx_ensure(env, mdbx_meta_txnid_stable(env, head) == - pending->mm_txnid_a.inconsistent && - !META_IS_STEADY(head) && META_IS_STEADY(pending)); - mdbx_ensure(env, memcmp(&head->mm_geo, &pending->mm_geo, - sizeof(head->mm_geo)) == 0); - mdbx_ensure(env, memcmp(&head->mm_dbs, &pending->mm_dbs, - sizeof(head->mm_dbs)) == 0); - mdbx_ensure(env, memcmp(&head->mm_canary, &pending->mm_canary, - sizeof(head->mm_canary)) == 0); - } - target->mm_datasync_sign = pending->mm_datasync_sign; - mdbx_flush_incoherent_cpu_writeback(); - mdbx_jitter4testing(true); - if ((flags & MDBX_SAFE_NOSYNC) == 0) { - /* sync meta-pages */ - const bool weak = (flags & (MDBX_MAPASYNC | MDBX_NOMETASYNC)) != 0; - rc = mdbx_msync(&env->me_dxb_mmap, 0, pgno_align2os_bytes(env, NUM_METAS), - weak); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - if (!weak) { -#if defined(__APPLE__) && \ - MDBX_OSX_SPEED_INSTEADOF_DURABILITY == MDBX_OSX_WANNA_DURABILITY - rc = likely(fcntl(env->me_lazy_fd, F_FULLFSYNC) != -1) ? MDBX_SUCCESS - : errno; - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; -#endif /* MacOS */ - *env->me_meta_sync_txnid = pending->mm_txnid_a.low; - } - } - } else { - const MDBX_meta undo_meta = *target; - const mdbx_filehandle_t fd = (env->me_dsync_fd != INVALID_HANDLE_VALUE) - ? env->me_dsync_fd - : env->me_lazy_fd; - rc = mdbx_pwrite(fd, pending, sizeof(MDBX_meta), - (uint8_t *)target - env->me_map); - if (unlikely(rc != MDBX_SUCCESS)) { - undo: - mdbx_debug("%s", "write failed, disk error?"); - /* On a failure, the pagecache still contains the new data. - * Try write some old data back, to prevent it from being used. */ - mdbx_pwrite(fd, &undo_meta, sizeof(MDBX_meta), - (uint8_t *)target - env->me_map); - goto fail; - } - mdbx_flush_incoherent_mmap(target, sizeof(MDBX_meta), env->me_os_psize); - if ((flags & (MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC)) == 0) { - /* sync meta-pages */ - if (fd == env->me_lazy_fd) { - rc = mdbx_filesync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - if (rc != MDBX_SUCCESS) - goto undo; - } - *env->me_meta_sync_txnid = pending->mm_txnid_a.low; - } - } - - /* LY: shrink datafile if needed */ - if (unlikely(shrink)) { - mdbx_verbose("shrink to %" PRIaPGNO " pages (-%" PRIaPGNO ")", - pending->mm_geo.now, shrink); - rc = mdbx_mapresize(env, pending->mm_geo.next, pending->mm_geo.now, - pending->mm_geo.upper); - if (MDBX_IS_ERROR(rc)) - goto fail; - } - - if (likely(env->me_lck)) - /* toggle oldest refresh */ - env->me_lck->mti_readers_refresh_flag = false; - - return MDBX_SUCCESS; - -fail: - env->me_flags |= MDBX_FATAL_ERROR; - return rc; -} - -static void __cold mdbx_setup_pagesize(MDBX_env *env, const size_t pagesize) { - STATIC_ASSERT(PTRDIFF_MAX > MAX_MAPSIZE); - STATIC_ASSERT(MIN_PAGESIZE > sizeof(MDBX_page) + sizeof(MDBX_meta)); - mdbx_ensure(env, is_powerof2(pagesize)); - mdbx_ensure(env, pagesize >= MIN_PAGESIZE); - mdbx_ensure(env, pagesize <= MAX_PAGESIZE); - env->me_psize = (unsigned)pagesize; - - STATIC_ASSERT(MAX_GC1OVPAGE(MIN_PAGESIZE) > 4); - STATIC_ASSERT(MAX_GC1OVPAGE(MAX_PAGESIZE) < MDBX_DPL_TXNFULL); - const intptr_t maxgc_ov1page = (pagesize - PAGEHDRSZ) / sizeof(pgno_t) - 1; - mdbx_ensure(env, - maxgc_ov1page > 42 && maxgc_ov1page < (intptr_t)MDBX_DPL_TXNFULL); - env->me_maxgc_ov1page = (unsigned)maxgc_ov1page; - - STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) > sizeof(MDBX_db) + NODESIZE + 42); - STATIC_ASSERT(LEAF_NODEMAX(MAX_PAGESIZE) < UINT16_MAX); - STATIC_ASSERT(LEAF_NODEMAX(MIN_PAGESIZE) > BRANCH_NODEMAX(MIN_PAGESIZE)); - STATIC_ASSERT(BRANCH_NODEMAX(MAX_PAGESIZE) > NODESIZE + 42); - STATIC_ASSERT(BRANCH_NODEMAX(MAX_PAGESIZE) < UINT16_MAX); - const intptr_t branch_nodemax = BRANCH_NODEMAX(pagesize); - mdbx_ensure(env, branch_nodemax > 42 && branch_nodemax < (int)UINT16_MAX && - branch_nodemax % 2 == 0); - env->me_branch_nodemax = (unsigned)branch_nodemax; - env->me_maxkey_nd = (uint16_t)mdbx_limits_keysize_max(pagesize, 0); - env->me_maxkey_ds = (uint16_t)mdbx_limits_keysize_max(pagesize, MDBX_DUPSORT); - env->me_maxval_nd = (unsigned)mdbx_limits_valsize_max(pagesize, 0); - env->me_maxval_ds = (unsigned)mdbx_limits_valsize_max(pagesize, MDBX_DUPSORT); - mdbx_ensure(env, env->me_maxkey_nd == - env->me_branch_nodemax - NODESIZE - sizeof(pgno_t)); - mdbx_ensure(env, env->me_maxkey_ds == - env->me_branch_nodemax - NODESIZE - sizeof(MDBX_db)); - - env->me_psize2log = log2n(pagesize); - mdbx_assert(env, pgno2bytes(env, 1) == pagesize); - mdbx_assert(env, bytes2pgno(env, pagesize + pagesize) == 2); -} - -int __cold mdbx_env_create(MDBX_env **penv) { - MDBX_env *env = mdbx_calloc(1, sizeof(MDBX_env)); - if (unlikely(!env)) - return MDBX_ENOMEM; - - env->me_maxreaders = DEFAULT_READERS; - env->me_maxdbs = env->me_numdbs = CORE_DBS; - env->me_lazy_fd = INVALID_HANDLE_VALUE; - env->me_dsync_fd = INVALID_HANDLE_VALUE; - env->me_lfd = INVALID_HANDLE_VALUE; - env->me_pid = mdbx_getpid(); - - int rc; - const size_t os_psize = mdbx_syspagesize(); - if (unlikely(!is_powerof2(os_psize) || os_psize < MIN_PAGESIZE)) { - mdbx_error("unsuitable system pagesize %" PRIuPTR, os_psize); - rc = MDBX_INCOMPATIBLE; - goto bailout; - } - env->me_os_psize = (unsigned)os_psize; - mdbx_setup_pagesize(env, env->me_os_psize); - - rc = mdbx_fastmutex_init(&env->me_dbi_lock); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - -#if defined(_WIN32) || defined(_WIN64) - mdbx_srwlock_Init(&env->me_remap_guard); - InitializeCriticalSection(&env->me_windowsbug_lock); -#else - rc = mdbx_fastmutex_init(&env->me_remap_guard); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_fastmutex_destroy(&env->me_dbi_lock); - goto bailout; - } - -#if MDBX_LOCKING > MDBX_LOCKING_SYSV - rc = mdbx_ipclock_stub(&env->me_lckless_stub.wlock); -#endif /* MDBX_LOCKING */ - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_fastmutex_destroy(&env->me_remap_guard); - mdbx_fastmutex_destroy(&env->me_dbi_lock); - goto bailout; - } -#endif /* Windows */ - - VALGRIND_CREATE_MEMPOOL(env, 0, 0); - env->me_signature = MDBX_ME_SIGNATURE; - *penv = env; - return MDBX_SUCCESS; - -bailout: - mdbx_free(env); - *penv = nullptr; - return rc; -} - -__cold LIBMDBX_API int -mdbx_env_set_geometry(MDBX_env *env, intptr_t size_lower, intptr_t size_now, - intptr_t size_upper, intptr_t growth_step, - intptr_t shrink_threshold, intptr_t pagesize) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) - env->me_flags |= MDBX_FATAL_ERROR; -#endif /* MDBX_TXN_CHECKPID */ - - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) - return MDBX_PANIC; - - const bool inside_txn = - (env->me_txn0 && env->me_txn0->mt_owner == mdbx_thread_self()); - -#if MDBX_DEBUG - if (growth_step < 0) - growth_step = 1; - if (shrink_threshold < 0) - shrink_threshold = 1; -#endif - - bool need_unlock = false; - int rc = MDBX_PROBLEM; - if (env->me_map) { - /* env already mapped */ - if (unlikely(env->me_flags & MDBX_RDONLY)) - return MDBX_EACCESS; - - if (!inside_txn) { - int err = mdbx_txn_lock(env, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - need_unlock = true; - } - MDBX_meta *head = mdbx_meta_head(env); - if (!inside_txn) { - env->me_txn0->mt_txnid = meta_txnid(env, head, false); - mdbx_find_oldest(env->me_txn0); - } - - /* get untouched params from DB */ - if (pagesize < 0) - pagesize = env->me_psize; - if (size_lower < 0) - size_lower = pgno2bytes(env, head->mm_geo.lower); - if (size_now < 0) - size_now = pgno2bytes(env, head->mm_geo.now); - if (size_upper < 0) - size_upper = pgno2bytes(env, head->mm_geo.upper); - if (growth_step < 0) - growth_step = pgno2bytes(env, head->mm_geo.grow); - if (shrink_threshold < 0) - shrink_threshold = pgno2bytes(env, head->mm_geo.shrink); - - if (pagesize != (intptr_t)env->me_psize) { - rc = MDBX_EINVAL; - goto bailout; - } - const size_t usedbytes = - pgno2bytes(env, mdbx_find_largest(env, head->mm_geo.next)); - if ((size_t)size_upper < usedbytes) { - rc = MDBX_MAP_FULL; - goto bailout; - } - if ((size_t)size_now < usedbytes) - size_now = usedbytes; - } else { - /* env NOT yet mapped */ - if (unlikely(inside_txn)) - return MDBX_PANIC; - - if (pagesize < 0) { - pagesize = env->me_os_psize; - if ((uintptr_t)pagesize > MAX_PAGESIZE) - pagesize = MAX_PAGESIZE; - mdbx_assert(env, (uintptr_t)pagesize >= MIN_PAGESIZE); - } - } - - if (pagesize == 0) - pagesize = MIN_PAGESIZE; - else if (pagesize == INTPTR_MAX) - pagesize = MAX_PAGESIZE; - - if (pagesize < (intptr_t)MIN_PAGESIZE || pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2(pagesize)) { - rc = MDBX_EINVAL; - goto bailout; - } - - if (size_lower <= 0) { - size_lower = MIN_MAPSIZE; - if (MIN_MAPSIZE / pagesize < MIN_PAGENO) - size_lower = MIN_PAGENO * pagesize; - } - - if (size_now <= 0) { - size_now = DEFAULT_MAPSIZE; - if (size_now < size_lower) - size_now = size_lower; - if (size_upper >= size_lower && size_now > size_upper) - size_now = size_upper; - } - - if (size_upper <= 0) { - if ((size_t)size_now >= MAX_MAPSIZE / 2) - size_upper = MAX_MAPSIZE; - else if (MAX_MAPSIZE != MAX_MAPSIZE32 && - (size_t)size_now >= MAX_MAPSIZE32 / 2 && - (size_t)size_now <= MAX_MAPSIZE32 / 4 * 3) - size_upper = MAX_MAPSIZE32; - else { - size_upper = size_now + size_now; - if ((size_t)size_upper < DEFAULT_MAPSIZE * 2) - size_upper = DEFAULT_MAPSIZE * 2; - } - if ((size_t)size_upper / pagesize > MAX_PAGENO) - size_upper = pagesize * MAX_PAGENO; - } - - if (unlikely(size_lower < (intptr_t)MIN_MAPSIZE || size_lower > size_upper)) { - rc = MDBX_EINVAL; - goto bailout; - } - - if ((uint64_t)size_lower / pagesize < MIN_PAGENO) { - rc = MDBX_EINVAL; - goto bailout; - } - - if (unlikely((size_t)size_upper > MAX_MAPSIZE || - (uint64_t)size_upper / pagesize > MAX_PAGENO)) { - rc = MDBX_TOO_LARGE; - goto bailout; - } - - const size_t unit = - (env->me_os_psize > (size_t)pagesize) ? env->me_os_psize : pagesize; - size_lower = roundup_powerof2(size_lower, unit); - size_upper = roundup_powerof2(size_upper, unit); - size_now = roundup_powerof2(size_now, unit); - - /* LY: подбираем значение size_upper: - * - кратное размеру страницы - * - без нарушения MAX_MAPSIZE и MAX_PAGENO */ - while (unlikely((size_t)size_upper > MAX_MAPSIZE || - (uint64_t)size_upper / pagesize > MAX_PAGENO)) { - if ((size_t)size_upper < unit + MIN_MAPSIZE || - (size_t)size_upper < (size_t)pagesize * (MIN_PAGENO + 1)) { - /* паранойа на случай переполнения при невероятных значениях */ - rc = MDBX_EINVAL; - goto bailout; - } - size_upper -= unit; - if ((size_t)size_upper < (size_t)size_lower) - size_lower = size_upper; - } - mdbx_assert(env, (size_upper - size_lower) % env->me_os_psize == 0); - - if (size_now < size_lower) - size_now = size_lower; - if (size_now > size_upper) - size_now = size_upper; - - if (growth_step < 0) { - growth_step = ((size_t)(size_upper - size_lower)) / 42; - if (growth_step > size_lower) - growth_step = size_lower; - if (growth_step < 65536) - growth_step = 65536; - if ((size_t)growth_step > MEGABYTE * 16) - growth_step = MEGABYTE * 16; - } - if (growth_step == 0 && shrink_threshold > 0) - growth_step = 1; - growth_step = roundup_powerof2(growth_step, unit); - if (bytes2pgno(env, growth_step) > UINT16_MAX) - growth_step = pgno2bytes(env, UINT16_MAX); - - if (shrink_threshold < 0) - shrink_threshold = growth_step + growth_step; - shrink_threshold = roundup_powerof2(shrink_threshold, unit); - if (bytes2pgno(env, shrink_threshold) > UINT16_MAX) - shrink_threshold = pgno2bytes(env, UINT16_MAX); - - /* save user's geo-params for future open/create */ - env->me_dbgeo.lower = size_lower; - env->me_dbgeo.now = size_now; - env->me_dbgeo.upper = size_upper; - env->me_dbgeo.grow = growth_step; - env->me_dbgeo.shrink = shrink_threshold; - rc = MDBX_SUCCESS; - - mdbx_ensure(env, pagesize >= MIN_PAGESIZE); - mdbx_ensure(env, pagesize <= MAX_PAGESIZE); - mdbx_ensure(env, is_powerof2(pagesize)); - mdbx_ensure(env, is_powerof2(env->me_os_psize)); - - mdbx_ensure(env, env->me_dbgeo.lower >= MIN_MAPSIZE); - mdbx_ensure(env, env->me_dbgeo.lower / pagesize >= MIN_PAGENO); - mdbx_ensure(env, env->me_dbgeo.lower % pagesize == 0); - mdbx_ensure(env, env->me_dbgeo.lower % env->me_os_psize == 0); - - mdbx_ensure(env, env->me_dbgeo.upper <= MAX_MAPSIZE); - mdbx_ensure(env, env->me_dbgeo.upper / pagesize <= MAX_PAGENO); - mdbx_ensure(env, env->me_dbgeo.upper % pagesize == 0); - mdbx_ensure(env, env->me_dbgeo.upper % env->me_os_psize == 0); - - mdbx_ensure(env, env->me_dbgeo.now >= env->me_dbgeo.lower); - mdbx_ensure(env, env->me_dbgeo.now <= env->me_dbgeo.upper); - mdbx_ensure(env, env->me_dbgeo.now % pagesize == 0); - mdbx_ensure(env, env->me_dbgeo.now % env->me_os_psize == 0); - - mdbx_ensure(env, env->me_dbgeo.grow % pagesize == 0); - mdbx_ensure(env, env->me_dbgeo.grow % env->me_os_psize == 0); - mdbx_ensure(env, env->me_dbgeo.shrink % pagesize == 0); - mdbx_ensure(env, env->me_dbgeo.shrink % env->me_os_psize == 0); - - if (env->me_map) { - /* apply new params to opened environment */ - mdbx_ensure(env, pagesize == (intptr_t)env->me_psize); - MDBX_meta meta; - MDBX_meta *head = nullptr; - const mdbx_geo_t *current_geo; - if (inside_txn) { - current_geo = &env->me_txn->mt_geo; - } else { - head = mdbx_meta_head(env); - meta = *head; - current_geo = &meta.mm_geo; - } - - mdbx_geo_t new_geo; - new_geo.lower = bytes2pgno(env, env->me_dbgeo.lower); - new_geo.now = bytes2pgno(env, env->me_dbgeo.now); - new_geo.upper = bytes2pgno(env, env->me_dbgeo.upper); - new_geo.grow = (uint16_t)bytes2pgno(env, env->me_dbgeo.grow); - new_geo.shrink = (uint16_t)bytes2pgno(env, env->me_dbgeo.shrink); - new_geo.next = current_geo->next; - - mdbx_ensure(env, - pgno_align2os_bytes(env, new_geo.lower) == env->me_dbgeo.lower); - mdbx_ensure(env, - pgno_align2os_bytes(env, new_geo.upper) == env->me_dbgeo.upper); - mdbx_ensure(env, - pgno_align2os_bytes(env, new_geo.now) == env->me_dbgeo.now); - mdbx_ensure(env, - pgno_align2os_bytes(env, new_geo.grow) == env->me_dbgeo.grow); - mdbx_ensure(env, pgno_align2os_bytes(env, new_geo.shrink) == - env->me_dbgeo.shrink); - - mdbx_ensure(env, env->me_dbgeo.lower >= MIN_MAPSIZE); - mdbx_ensure(env, new_geo.lower >= MIN_PAGENO); - mdbx_ensure(env, env->me_dbgeo.upper <= MAX_MAPSIZE); - mdbx_ensure(env, new_geo.upper <= MAX_PAGENO); - mdbx_ensure(env, new_geo.now >= new_geo.next); - mdbx_ensure(env, new_geo.upper >= new_geo.now); - mdbx_ensure(env, new_geo.now >= new_geo.lower); - - if (memcmp(current_geo, &new_geo, sizeof(mdbx_geo_t)) != 0) { -#if defined(_WIN32) || defined(_WIN64) - /* Was DB shrinking disabled before and now it will be enabled? */ - if (new_geo.lower < new_geo.upper && new_geo.shrink && - !(current_geo->lower < current_geo->upper && current_geo->shrink)) { - if (!env->me_lck) { - rc = MDBX_EPERM; - goto bailout; - } - rc = mdbx_rdt_lock(env); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - /* Check if there are any reading threads that do not use the SRWL */ - const size_t CurrentTid = GetCurrentThreadId(); - const MDBX_reader *const begin = env->me_lck->mti_readers; - const MDBX_reader *const end = begin + env->me_lck->mti_numreaders; - for (const MDBX_reader *reader = begin; reader < end; ++reader) { - if (reader->mr_pid == env->me_pid && reader->mr_tid && - reader->mr_tid != CurrentTid) { - /* At least one thread may don't use SRWL */ - rc = MDBX_EPERM; - break; - } - } - - mdbx_rdt_unlock(env); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } -#endif - - if (new_geo.now != current_geo->now || - new_geo.upper != current_geo->upper) { - rc = mdbx_mapresize(env, current_geo->next, new_geo.now, new_geo.upper); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - mdbx_assert(env, (head == nullptr) == inside_txn); - if (head) - head = /* base address could be changed */ mdbx_meta_head(env); - } - if (inside_txn) { - env->me_txn->mt_geo = new_geo; - env->me_txn->mt_flags |= MDBX_TXN_DIRTY; - } else { - mdbx_meta_set_txnid( - env, &meta, safe64_txnid_next(mdbx_meta_txnid_stable(env, head))); - rc = mdbx_sync_locked(env, env->me_flags, &meta); - } - } - } else if (pagesize != (intptr_t)env->me_psize) { - mdbx_setup_pagesize(env, pagesize); - } - -bailout: - if (need_unlock) - mdbx_txn_unlock(env); - return rc; -} - -int __cold mdbx_env_set_mapsize(MDBX_env *env, size_t size) { - return mdbx_env_set_geometry(env, size, size, size, -1, -1, -1); -} - -int __cold mdbx_env_set_maxdbs(MDBX_env *env, MDBX_dbi dbs) { - if (unlikely(dbs > MAX_DBI)) - return MDBX_EINVAL; - - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(env->me_map)) - return MDBX_EPERM; - - env->me_maxdbs = dbs + CORE_DBS; - return MDBX_SUCCESS; -} - -int __cold mdbx_env_set_maxreaders(MDBX_env *env, unsigned readers) { - if (unlikely(readers < 1 || readers > MDBX_READERS_LIMIT)) - return MDBX_EINVAL; - - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(env->me_map)) - return MDBX_EPERM; - - env->me_maxreaders = readers; - return MDBX_SUCCESS; -} - -int __cold mdbx_env_get_maxreaders(MDBX_env *env, unsigned *readers) { - if (!env || !readers) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - *readers = env->me_maxreaders; - return MDBX_SUCCESS; -} - -/* Further setup required for opening an MDBX environment */ -static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) { - uint64_t filesize_before; - MDBX_meta meta; - int rc = MDBX_RESULT_FALSE; - int err = mdbx_read_header(env, &meta, &filesize_before, lck_rc); - if (unlikely(err != MDBX_SUCCESS)) { - if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE || err != MDBX_ENODATA || - (env->me_flags & MDBX_RDONLY) != 0) - return err; - - mdbx_debug("%s", "create new database"); - rc = /* new database */ MDBX_RESULT_TRUE; - - if (!env->me_dbgeo.now) { - /* set defaults if not configured */ - err = mdbx_env_set_geometry(env, 0, -1, DEFAULT_MAPSIZE, -1, -1, -1); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - - void *buffer = mdbx_calloc(NUM_METAS, env->me_psize); - if (!buffer) - return MDBX_ENOMEM; - - meta = *mdbx_init_metas(env, buffer); - err = mdbx_pwrite(env->me_lazy_fd, buffer, env->me_psize * NUM_METAS, 0); - mdbx_free(buffer); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - err = mdbx_ftruncate(env->me_lazy_fd, filesize_before = env->me_dbgeo.now); - if (unlikely(err != MDBX_SUCCESS)) - return err; - -#ifndef NDEBUG /* just for checking */ - err = mdbx_read_header(env, &meta, &filesize_before, lck_rc); - if (unlikely(err != MDBX_SUCCESS)) - return err; -#endif - } - - mdbx_verbose("header: root %" PRIaPGNO "/%" PRIaPGNO ", geo %" PRIaPGNO - "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO - " +%u -%u, txn_id %" PRIaTXN ", %s", - meta.mm_dbs[MAIN_DBI].md_root, meta.mm_dbs[FREE_DBI].md_root, - meta.mm_geo.lower, meta.mm_geo.next, meta.mm_geo.now, - meta.mm_geo.upper, meta.mm_geo.grow, meta.mm_geo.shrink, - meta.mm_txnid_a.inconsistent, mdbx_durable_str(&meta)); - - mdbx_setup_pagesize(env, meta.mm_psize); - const size_t used_bytes = pgno2bytes(env, meta.mm_geo.next); - const size_t used_aligned2os_bytes = - roundup_powerof2(used_bytes, env->me_os_psize); - if ((env->me_flags & MDBX_RDONLY) /* readonly */ - || lck_rc != MDBX_RESULT_TRUE /* not exclusive */) { - /* use present params from db */ - const size_t pagesize = meta.mm_psize; - err = mdbx_env_set_geometry( - env, meta.mm_geo.lower * pagesize, meta.mm_geo.now * pagesize, - meta.mm_geo.upper * pagesize, meta.mm_geo.grow * pagesize, - meta.mm_geo.shrink * pagesize, meta.mm_psize); - if (unlikely(err != MDBX_SUCCESS)) { - mdbx_error("%s", "could not use present dbsize-params from db"); - return MDBX_INCOMPATIBLE; - } - } else if (env->me_dbgeo.now) { - /* silently growth to last used page */ - if (env->me_dbgeo.now < used_aligned2os_bytes) - env->me_dbgeo.now = used_aligned2os_bytes; - if (env->me_dbgeo.upper < used_aligned2os_bytes) - env->me_dbgeo.upper = used_aligned2os_bytes; - - /* apply preconfigured params, but only if substantial changes: - * - upper or lower limit changes - * - shrink threshold or growth step - * But ignore change just a 'now/current' size. */ - if (bytes_align2os_bytes(env, env->me_dbgeo.upper) != - pgno2bytes(env, meta.mm_geo.upper) || - bytes_align2os_bytes(env, env->me_dbgeo.lower) != - pgno2bytes(env, meta.mm_geo.lower) || - bytes_align2os_bytes(env, env->me_dbgeo.shrink) != - pgno2bytes(env, meta.mm_geo.shrink) || - bytes_align2os_bytes(env, env->me_dbgeo.grow) != - pgno2bytes(env, meta.mm_geo.grow)) { - - if (env->me_dbgeo.shrink && env->me_dbgeo.now > used_bytes) - /* pre-shrink if enabled */ - env->me_dbgeo.now = used_bytes + env->me_dbgeo.shrink - - used_bytes % env->me_dbgeo.shrink; - - err = mdbx_env_set_geometry(env, env->me_dbgeo.lower, env->me_dbgeo.now, - env->me_dbgeo.upper, env->me_dbgeo.grow, - env->me_dbgeo.shrink, meta.mm_psize); - if (unlikely(err != MDBX_SUCCESS)) { - mdbx_error("%s", "could not apply preconfigured dbsize-params to db"); - return MDBX_INCOMPATIBLE; - } - - /* update meta fields */ - meta.mm_geo.now = bytes2pgno(env, env->me_dbgeo.now); - meta.mm_geo.lower = bytes2pgno(env, env->me_dbgeo.lower); - meta.mm_geo.upper = bytes2pgno(env, env->me_dbgeo.upper); - meta.mm_geo.grow = (uint16_t)bytes2pgno(env, env->me_dbgeo.grow); - meta.mm_geo.shrink = (uint16_t)bytes2pgno(env, env->me_dbgeo.shrink); - - mdbx_verbose("amended: root %" PRIaPGNO "/%" PRIaPGNO ", geo %" PRIaPGNO - "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO - " +%u -%u, txn_id %" PRIaTXN ", %s", - meta.mm_dbs[MAIN_DBI].md_root, meta.mm_dbs[FREE_DBI].md_root, - meta.mm_geo.lower, meta.mm_geo.next, meta.mm_geo.now, - meta.mm_geo.upper, meta.mm_geo.grow, meta.mm_geo.shrink, - meta.mm_txnid_a.inconsistent, mdbx_durable_str(&meta)); - } else { - /* fetch back 'now/current' size, since it was ignored during comparison - * and may differ. */ - env->me_dbgeo.now = pgno_align2os_bytes(env, meta.mm_geo.now); - } - mdbx_ensure(env, meta.mm_geo.now >= meta.mm_geo.next); - } else { - /* geo-params are not pre-configured by user, - * get current values from the meta. */ - env->me_dbgeo.now = pgno2bytes(env, meta.mm_geo.now); - env->me_dbgeo.lower = pgno2bytes(env, meta.mm_geo.lower); - env->me_dbgeo.upper = pgno2bytes(env, meta.mm_geo.upper); - env->me_dbgeo.grow = pgno2bytes(env, meta.mm_geo.grow); - env->me_dbgeo.shrink = pgno2bytes(env, meta.mm_geo.shrink); - } - - mdbx_ensure(env, - pgno_align2os_bytes(env, meta.mm_geo.now) == env->me_dbgeo.now); - mdbx_ensure(env, env->me_dbgeo.now >= used_bytes); - if (unlikely(filesize_before != env->me_dbgeo.now)) { - if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE) { - mdbx_verbose("filesize mismatch (expect %" PRIuPTR "b/%" PRIaPGNO - "p, have %" PRIu64 "b/%" PRIaPGNO "p), " - "assume other process working", - env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now), - filesize_before, bytes2pgno(env, (size_t)filesize_before)); - } else { - mdbx_notice("filesize mismatch (expect %" PRIuSIZE "b/%" PRIaPGNO - "p, have %" PRIu64 "b/%" PRIaPGNO "p)", - env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now), - filesize_before, bytes2pgno(env, (size_t)filesize_before)); - if (filesize_before < used_bytes) { - mdbx_error("last-page beyond end-of-file (last %" PRIaPGNO - ", have %" PRIaPGNO ")", - meta.mm_geo.next, bytes2pgno(env, (size_t)filesize_before)); - return MDBX_CORRUPTED; - } - - if (env->me_flags & MDBX_RDONLY) { - if (filesize_before & (env->me_os_psize - 1)) { - mdbx_error("%s", "filesize should be rounded-up to system page"); - return MDBX_WANNA_RECOVERY; - } - mdbx_warning("%s", "ignore filesize mismatch in readonly-mode"); - } else { - mdbx_verbose("will resize datafile to %" PRIuSIZE " bytes, %" PRIaPGNO - " pages", - env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now)); - } - } - } - - mdbx_verbose("current boot-id %" PRIx64 "-%" PRIx64 " (%savailable)", - bootid.x, bootid.y, (bootid.x | bootid.y) ? "" : "not-"); - - err = mdbx_mmap(env->me_flags, &env->me_dxb_mmap, env->me_dbgeo.now, - env->me_dbgeo.upper, lck_rc ? MMAP_OPTION_TRUNCATE : 0); - if (unlikely(err != MDBX_SUCCESS)) - return err; - -#if defined(MADV_DONTDUMP) - err = madvise(env->me_map, env->me_dxb_mmap.limit, MADV_DONTDUMP) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#endif /* MADV_DONTDUMP */ -#if defined(MADV_DODUMP) - if (mdbx_runtime_flags & MDBX_DBG_DUMP) { - const size_t meta_length_aligned2os = pgno_align2os_bytes(env, NUM_METAS); - err = madvise(env->me_map, meta_length_aligned2os, MADV_DODUMP) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } -#endif /* MADV_DODUMP */ - -#ifdef MDBX_USE_VALGRIND - env->me_valgrind_handle = - VALGRIND_CREATE_BLOCK(env->me_map, env->me_dxb_mmap.limit, "mdbx"); -#endif /* MDBX_USE_VALGRIND */ - - mdbx_assert(env, used_bytes >= pgno2bytes(env, NUM_METAS) && - used_bytes <= env->me_dxb_mmap.limit); -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - VALGRIND_MAKE_MEM_NOACCESS(env->me_map + used_bytes, - env->me_dxb_mmap.limit - used_bytes); - ASAN_POISON_MEMORY_REGION(env->me_map + used_bytes, - env->me_dxb_mmap.limit - used_bytes); - env->me_poison_edge = bytes2pgno(env, env->me_dxb_mmap.limit); -#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ - - const unsigned meta_clash_mask = mdbx_meta_eq_mask(env); - if (meta_clash_mask) { - mdbx_error("meta-pages are clashed: mask 0x%d", meta_clash_mask); - return MDBX_CORRUPTED; - } - - while (1) { - MDBX_meta *const head = mdbx_meta_head(env); - const txnid_t head_txnid = mdbx_meta_txnid_fluid(env, head); - MDBX_meta *const steady = mdbx_meta_steady(env); - const txnid_t steady_txnid = mdbx_meta_txnid_fluid(env, steady); - if (head_txnid == steady_txnid) - break; - - if (lck_rc == /* lck exclusive */ MDBX_RESULT_TRUE) { - mdbx_assert(env, META_IS_STEADY(&meta) && !META_IS_STEADY(head)); - if (env->me_flags & MDBX_RDONLY) { - mdbx_error("rollback needed: (from head %" PRIaTXN - " to steady %" PRIaTXN "), but unable in read-only mode", - head_txnid, steady_txnid); - return MDBX_WANNA_RECOVERY /* LY: could not recovery/rollback */; - } - - if (meta_bootid_match(head)) { - MDBX_meta clone = *head; - uint64_t filesize = env->me_dbgeo.now; - err = mdbx_validate_meta( - env, &clone, &filesize, data_page(head), - bytes2pgno(env, (uint8_t *)data_page(head) - env->me_map), nullptr, - env->me_psize); - if (err == MDBX_SUCCESS) { - mdbx_notice("opening after an unclean shutdown, " - "but boot-id(%016" PRIx64 "-%016" PRIx64 ") is MATCH, " - "rollback NOT needed", - bootid.x, bootid.y); - meta = clone; - *env->me_unsynced_pages = meta.mm_geo.next; - break; - } - mdbx_notice("opening after an unclean shutdown, " - "but boot-id(%016" PRIx64 "-%016" PRIx64 ") is MATCH, " - "but last meta not valid, rollback needed", - bootid.x, bootid.y); - } - - const MDBX_meta *const meta0 = METAPAGE(env, 0); - const MDBX_meta *const meta1 = METAPAGE(env, 1); - const MDBX_meta *const meta2 = METAPAGE(env, 2); - txnid_t undo_txnid = 0 /* zero means undo is unneeded */; - while ( - (head != meta0 && mdbx_meta_txnid_fluid(env, meta0) == undo_txnid) || - (head != meta1 && mdbx_meta_txnid_fluid(env, meta1) == undo_txnid) || - (head != meta2 && mdbx_meta_txnid_fluid(env, meta2) == undo_txnid)) - undo_txnid = safe64_txnid_next(undo_txnid); - if (unlikely(undo_txnid >= steady_txnid)) { - mdbx_fatal("rollback failed: no suitable txnid (0,1,2) < %" PRIaTXN, - steady_txnid); - return MDBX_PANIC /* LY: could not recovery/rollback */; - } - - /* LY: rollback weak checkpoint */ - mdbx_trace("rollback: from %" PRIaTXN ", to %" PRIaTXN " as %" PRIaTXN, - head_txnid, steady_txnid, undo_txnid); - mdbx_ensure(env, head_txnid == mdbx_meta_txnid_stable(env, head)); - - if (env->me_flags & MDBX_WRITEMAP) { - /* It is possible to update txnid without safe64_write(), - * since DB opened exclusive for now */ - head->mm_txnid_a.inconsistent = undo_txnid; - head->mm_datasync_sign = MDBX_DATASIGN_WEAK; - head->mm_txnid_b.inconsistent = undo_txnid; - const size_t offset = (uint8_t *)data_page(head) - env->me_dxb_mmap.dxb; - const size_t paged_offset = offset & ~(env->me_os_psize - 1); - const size_t paged_length = roundup_powerof2( - env->me_psize + offset - paged_offset, env->me_os_psize); - err = mdbx_msync(&env->me_dxb_mmap, paged_offset, paged_length, false); - } else { - MDBX_meta rollback = *head; - mdbx_meta_set_txnid(env, &rollback, undo_txnid); - rollback.mm_datasync_sign = MDBX_DATASIGN_WEAK; - err = mdbx_pwrite(env->me_lazy_fd, &rollback, sizeof(MDBX_meta), - (uint8_t *)head - (uint8_t *)env->me_map); - } - if (err) { - mdbx_error("error %d rollback from %" PRIaTXN ", to %" PRIaTXN - " as %" PRIaTXN, - err, head_txnid, steady_txnid, undo_txnid); - return err; - } - - mdbx_flush_incoherent_mmap(env->me_map, pgno2bytes(env, NUM_METAS), - env->me_os_psize); - mdbx_ensure(env, undo_txnid == mdbx_meta_txnid_fluid(env, head)); - mdbx_ensure(env, 0 == mdbx_meta_eq_mask(env)); - continue; - } - - if (!env->me_lck) { - /* LY: without-lck (read-only) mode, so it is imposible that other - * process made weak checkpoint. */ - mdbx_error("%s", "without-lck, unable recovery/rollback"); - return MDBX_WANNA_RECOVERY; - } - - /* LY: assume just have a collision with other running process, - * or someone make a weak checkpoint */ - mdbx_verbose("%s", "assume collision or online weak checkpoint"); - break; - } - - const MDBX_meta *head = mdbx_meta_head(env); - if (lck_rc == /* lck exclusive */ MDBX_RESULT_TRUE) { - /* re-check size after mmap */ - if ((env->me_dxb_mmap.current & (env->me_os_psize - 1)) != 0 || - env->me_dxb_mmap.current < used_bytes) { - mdbx_error("unacceptable/unexpected datafile size %" PRIuPTR, - env->me_dxb_mmap.current); - return MDBX_PROBLEM; - } - if (env->me_dxb_mmap.current != env->me_dbgeo.now && - (env->me_flags & MDBX_RDONLY) == 0) { - meta.mm_geo.now = bytes2pgno(env, env->me_dxb_mmap.current); - mdbx_verbose("update meta-geo to filesize %" PRIuPTR " bytes, %" PRIaPGNO - " pages", - env->me_dxb_mmap.current, meta.mm_geo.now); - } - - if (memcmp(&meta.mm_geo, &head->mm_geo, sizeof(meta.mm_geo))) { - const txnid_t txnid = mdbx_meta_txnid_stable(env, head); - const txnid_t next_txnid = safe64_txnid_next(txnid); - mdbx_verbose("updating meta.geo: " - "from l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO - "/s%u-g%u (txn#%" PRIaTXN "), " - "to l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO - "/s%u-g%u (txn#%" PRIaTXN ")", - head->mm_geo.lower, head->mm_geo.now, head->mm_geo.upper, - head->mm_geo.shrink, head->mm_geo.grow, txnid, - meta.mm_geo.lower, meta.mm_geo.now, meta.mm_geo.upper, - meta.mm_geo.shrink, meta.mm_geo.grow, next_txnid); - - mdbx_ensure(env, mdbx_meta_eq(env, &meta, head)); - mdbx_meta_set_txnid(env, &meta, next_txnid); - err = mdbx_sync_locked(env, env->me_flags | MDBX_SHRINK_ALLOWED, &meta); - if (err) { - mdbx_error("error %d, while updating meta.geo: " - "from l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO - "/s%u-g%u (txn#%" PRIaTXN "), " - "to l%" PRIaPGNO "-n%" PRIaPGNO "-u%" PRIaPGNO - "/s%u-g%u (txn#%" PRIaTXN ")", - err, head->mm_geo.lower, head->mm_geo.now, - head->mm_geo.upper, head->mm_geo.shrink, head->mm_geo.grow, - txnid, meta.mm_geo.lower, meta.mm_geo.now, meta.mm_geo.upper, - meta.mm_geo.shrink, meta.mm_geo.grow, next_txnid); - return err; - } - } - } - - *env->me_discarded_tail = bytes2pgno(env, used_aligned2os_bytes); - if (used_aligned2os_bytes < env->me_dxb_mmap.current) { -#if defined(MADV_REMOVE) - if (lck_rc && (env->me_flags & MDBX_WRITEMAP) != 0) { - mdbx_notice("open-MADV_%s %u..%u", "REMOVE", *env->me_discarded_tail, - bytes2pgno(env, env->me_dxb_mmap.current)); - err = - madvise(env->me_map + used_aligned2os_bytes, - env->me_dxb_mmap.current - used_aligned2os_bytes, MADV_REMOVE) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } -#endif /* MADV_REMOVE */ -#if defined(MADV_DONTNEED) - mdbx_notice("open-MADV_%s %u..%u", "DONTNEED", *env->me_discarded_tail, - bytes2pgno(env, env->me_dxb_mmap.current)); - err = - madvise(env->me_map + used_aligned2os_bytes, - env->me_dxb_mmap.current - used_aligned2os_bytes, MADV_DONTNEED) - ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#elif defined(POSIX_MADV_DONTNEED) - err = ignore_enosys(posix_madvise( - env->me_map + used_aligned2os_bytes, - env->me_dxb_mmap.current - used_aligned2os_bytes, POSIX_MADV_DONTNEED)); - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#elif defined(POSIX_FADV_DONTNEED) - err = ignore_enosys(posix_fadvise( - env->me_lazy_fd, used_aligned2os_bytes, - env->me_dxb_mmap.current - used_aligned2os_bytes, POSIX_FADV_DONTNEED)); - if (unlikely(MDBX_IS_ERROR(err))) - return err; -#endif /* MADV_DONTNEED */ - } - - const bool readahead = (env->me_flags & MDBX_NORDAHEAD) == 0 && - mdbx_is_readahead_reasonable(env->me_dxb_mmap.current, - 0) == MDBX_RESULT_TRUE; - err = mdbx_set_readahead(env, 0, used_bytes, readahead); - if (err != MDBX_SUCCESS && lck_rc == /* lck exclusive */ MDBX_RESULT_TRUE) - return err; - - return rc; -} - -/******************************************************************************/ - -/* Open and/or initialize the lock region for the environment. */ -static int __cold mdbx_setup_lck(MDBX_env *env, char *lck_pathname, - mode_t mode) { - mdbx_assert(env, env->me_lazy_fd != INVALID_HANDLE_VALUE); - mdbx_assert(env, env->me_lfd == INVALID_HANDLE_VALUE); - - int err = mdbx_openfile(MDBX_OPEN_LCK, env, lck_pathname, &env->me_lfd, mode); - if (err != MDBX_SUCCESS) { - if (!(err == MDBX_ENOFILE && (env->me_flags & MDBX_EXCLUSIVE)) && - !((err == MDBX_EROFS || err == MDBX_EACCESS || err == MDBX_EPERM) && - (env->me_flags & MDBX_RDONLY))) - return err; - - /* ensure the file system is read-only */ - err = mdbx_check_fs_rdonly(env->me_lazy_fd, lck_pathname, err); - if (err != MDBX_SUCCESS) - return err; - - /* LY: without-lck mode (e.g. exclusive or on read-only filesystem) */ - /* beginning of a locked section ---------------------------------------- */ - lcklist_lock(); - mdbx_assert(env, env->me_lcklist_next == nullptr); - env->me_lfd = INVALID_HANDLE_VALUE; - const int rc = mdbx_lck_seize(env); - if (MDBX_IS_ERROR(rc)) { - /* Calling lcklist_detach_locked() is required to restore POSIX-filelock - * and this job will be done by mdbx_env_close0(). */ - lcklist_unlock(); - return rc; - } - /* insert into inprocess lck-list */ - env->me_lcklist_next = inprocess_lcklist_head; - inprocess_lcklist_head = env; - lcklist_unlock(); - /* end of a locked section ---------------------------------------------- */ - - env->me_oldest = &env->me_lckless_stub.oldest; - env->me_sync_timestamp = &env->me_lckless_stub.sync_timestamp; - env->me_autosync_period = &env->me_lckless_stub.autosync_period; - env->me_unsynced_pages = &env->me_lckless_stub.autosync_pending; - env->me_autosync_threshold = &env->me_lckless_stub.autosync_threshold; - env->me_discarded_tail = &env->me_lckless_stub.discarded_tail; - env->me_meta_sync_txnid = &env->me_lckless_stub.meta_sync_txnid; - env->me_maxreaders = UINT_MAX; -#if MDBX_LOCKING > 0 - env->me_wlock = &env->me_lckless_stub.wlock; -#endif /* MDBX_LOCKING > 0 */ - mdbx_debug("lck-setup:%s%s%s", " lck-less", - (env->me_flags & MDBX_RDONLY) ? " readonly" : "", - (rc == MDBX_RESULT_TRUE) ? " exclusive" : " cooperative"); - return rc; - } - - /* beginning of a locked section ------------------------------------------ */ - lcklist_lock(); - mdbx_assert(env, env->me_lcklist_next == nullptr); - - /* Try to get exclusive lock. If we succeed, then - * nobody is using the lock region and we should initialize it. */ - err = mdbx_lck_seize(env); - if (MDBX_IS_ERROR(err)) { - bailout: - /* Calling lcklist_detach_locked() is required to restore POSIX-filelock - * and this job will be done by mdbx_env_close0(). */ - lcklist_unlock(); - return err; - } - - MDBX_env *inprocess_neighbor = nullptr; - if (err == MDBX_RESULT_TRUE) { - err = uniq_check(&env->me_lck_mmap, &inprocess_neighbor); - if (MDBX_IS_ERROR(err)) - goto bailout; - if (inprocess_neighbor && - ((mdbx_runtime_flags & MDBX_DBG_LEGACY_MULTIOPEN) == 0 || - (inprocess_neighbor->me_flags & MDBX_EXCLUSIVE) != 0)) { - err = MDBX_BUSY; - goto bailout; - } - } - const int lck_seize_rc = err; - - mdbx_debug("lck-setup:%s%s%s", " with-lck", - (env->me_flags & MDBX_RDONLY) ? " readonly" : "", - (lck_seize_rc == MDBX_RESULT_TRUE) ? " exclusive" - : " cooperative"); - - uint64_t size = 0; - err = mdbx_filesize(env->me_lfd, &size); - if (unlikely(err != MDBX_SUCCESS)) - goto bailout; - - if (lck_seize_rc == MDBX_RESULT_TRUE) { - size = roundup_powerof2(env->me_maxreaders * sizeof(MDBX_reader) + - sizeof(MDBX_lockinfo), - env->me_os_psize); - mdbx_jitter4testing(false); - } else { - if (env->me_flags & MDBX_EXCLUSIVE) { - err = MDBX_BUSY; - goto bailout; - } - if (size > INT_MAX || (size & (env->me_os_psize - 1)) != 0 || - size < env->me_os_psize) { - mdbx_error("lck-file has invalid size %" PRIu64 " bytes", size); - err = MDBX_PROBLEM; - goto bailout; - } - } - - const size_t maxreaders = - ((size_t)size - sizeof(MDBX_lockinfo)) / sizeof(MDBX_reader); - if (size > 65536 || maxreaders < 2 || maxreaders > MDBX_READERS_LIMIT) { - mdbx_error("lck-size too big (up to %" PRIuPTR " readers)", maxreaders); - err = MDBX_PROBLEM; - goto bailout; - } - env->me_maxreaders = (unsigned)maxreaders; - - err = mdbx_mmap((env->me_flags & MDBX_EXCLUSIVE) | MDBX_WRITEMAP, &env->me_lck_mmap, (size_t)size, (size_t)size, - lck_seize_rc ? MMAP_OPTION_TRUNCATE | MMAP_OPTION_SEMAPHORE - : MMAP_OPTION_SEMAPHORE); - if (unlikely(err != MDBX_SUCCESS)) - goto bailout; - -#ifdef MADV_DODUMP - err = madvise(env->me_lck, size, MADV_DODUMP) ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - goto bailout; -#endif /* MADV_DODUMP */ - -#ifdef MADV_WILLNEED - err = madvise(env->me_lck, size, MADV_WILLNEED) ? ignore_enosys(errno) - : MDBX_SUCCESS; - if (unlikely(MDBX_IS_ERROR(err))) - goto bailout; -#endif /* MADV_WILLNEED */ - - struct MDBX_lockinfo *const lck = env->me_lck; - if (lck_seize_rc == MDBX_RESULT_TRUE) { - /* LY: exlcusive mode, check and reset lck content */ - memset(lck, 0, (size_t)size); - mdbx_jitter4testing(false); - lck->mti_magic_and_version = MDBX_LOCK_MAGIC; - lck->mti_os_and_format = MDBX_LOCK_FORMAT; - } else { - if (lck->mti_magic_and_version != MDBX_LOCK_MAGIC) { - mdbx_error("%s", "lock region has invalid magic/version"); - err = ((lck->mti_magic_and_version >> 8) != MDBX_MAGIC) - ? MDBX_INVALID - : MDBX_VERSION_MISMATCH; - goto bailout; - } - if (lck->mti_os_and_format != MDBX_LOCK_FORMAT) { - mdbx_error("lock region has os/format 0x%" PRIx32 ", expected 0x%" PRIx32, - lck->mti_os_and_format, MDBX_LOCK_FORMAT); - err = MDBX_VERSION_MISMATCH; - goto bailout; - } - } - - err = mdbx_lck_init(env, inprocess_neighbor, lck_seize_rc); - if (MDBX_IS_ERROR(err)) - goto bailout; - - mdbx_ensure(env, env->me_lcklist_next == nullptr); - /* insert into inprocess lck-list */ - env->me_lcklist_next = inprocess_lcklist_head; - inprocess_lcklist_head = env; - lcklist_unlock(); - /* end of a locked section ------------------------------------------------ */ - - mdbx_assert(env, !MDBX_IS_ERROR(lck_seize_rc)); - env->me_oldest = &lck->mti_oldest_reader; - env->me_sync_timestamp = &lck->mti_sync_timestamp; - env->me_autosync_period = &lck->mti_autosync_period; - env->me_unsynced_pages = &lck->mti_unsynced_pages; - env->me_autosync_threshold = &lck->mti_autosync_threshold; - env->me_discarded_tail = &lck->mti_discarded_tail; - env->me_meta_sync_txnid = &lck->mti_meta_sync_txnid; -#if MDBX_LOCKING > 0 - env->me_wlock = &lck->mti_wlock; -#endif /* MDBX_LOCKING > 0 */ - return lck_seize_rc; -} - -__cold int mdbx_is_readahead_reasonable(size_t volume, intptr_t redundancy) { - if (volume <= 1024 * 1024 * 4ul) - return MDBX_RESULT_TRUE; - - const intptr_t pagesize = mdbx_syspagesize(); - if (unlikely(pagesize < MIN_PAGESIZE || !is_powerof2(pagesize))) - return MDBX_INCOMPATIBLE; - -#if defined(_WIN32) || defined(_WIN64) - MEMORYSTATUSEX info; - memset(&info, 0, sizeof(info)); - info.dwLength = sizeof(info); - if (!GlobalMemoryStatusEx(&info)) - return GetLastError(); -#endif - const int log2page = log2n(pagesize); - -#if defined(_WIN32) || defined(_WIN64) - const intptr_t total_ram_pages = (intptr_t)(info.ullTotalPhys >> log2page); -#elif defined(_SC_PHYS_PAGES) - const intptr_t total_ram_pages = sysconf(_SC_PHYS_PAGES); - if (total_ram_pages == -1) - return errno; -#elif defined(_SC_AIX_REALMEM) - const intptr_t total_ram_Kb = sysconf(_SC_AIX_REALMEM); - if (total_ram_Kb == -1) - return errno; - const intptr_t total_ram_pages = (total_ram_Kb << 10) >> log2page; -#elif defined(HW_USERMEM) || defined(HW_PHYSMEM64) || defined(HW_MEMSIZE) || \ - defined(HW_PHYSMEM) - size_t ram, len = sizeof(ram); - static const int mib[] = { - CTL_HW, -#if defined(HW_USERMEM) - HW_USERMEM -#elif defined(HW_PHYSMEM64) - HW_PHYSMEM64 -#elif defined(HW_MEMSIZE) - HW_MEMSIZE -#else - HW_PHYSMEM -#endif - }; - if (sysctl( -#ifdef SYSCTL_LEGACY_NONCONST_MIB - (int *) -#endif - mib, - ARRAY_LENGTH(mib), &ram, &len, NULL, 0) != 0) - return errno; - if (len != sizeof(ram)) - return MDBX_ENOSYS; - const intptr_t total_ram_pages = (intptr_t)(ram >> log2page); -#else -#error "FIXME: Get User-accessible or physical RAM" -#endif - if (total_ram_pages < 1) - return MDBX_ENOSYS; - - const intptr_t volume_pages = (volume + pagesize - 1) >> log2page; - const intptr_t redundancy_pages = - (redundancy < 0) ? -(intptr_t)((-redundancy + pagesize - 1) >> log2page) - : (intptr_t)(redundancy + pagesize - 1) >> log2page; - if (volume_pages >= total_ram_pages || - volume_pages + redundancy_pages >= total_ram_pages) - return MDBX_RESULT_FALSE; - -#if defined(_WIN32) || defined(_WIN64) - const intptr_t avail_ram_pages = (intptr_t)(info.ullAvailPhys >> log2page); -#elif defined(_SC_AVPHYS_PAGES) - const intptr_t avail_ram_pages = sysconf(_SC_AVPHYS_PAGES); - if (avail_ram_pages == -1) - return errno; -#elif defined(__MACH__) - mach_msg_type_number_t count = HOST_VM_INFO_COUNT; - vm_statistics_data_t vmstat; - mach_port_t mport = mach_host_self(); - kern_return_t kerr = host_statistics(mach_host_self(), HOST_VM_INFO, - (host_info_t)&vmstat, &count); - mach_port_deallocate(mach_task_self(), mport); - if (unlikely(kerr != KERN_SUCCESS)) - return MDBX_ENOSYS; - const intptr_t avail_ram_pages = vmstat.free_count; -#elif defined(VM_TOTAL) || defined(VM_METER) - struct vmtotal info; - size_t len = sizeof(info); - static const int mib[] = { - CTL_VM, -#if defined(VM_TOTAL) - VM_TOTAL -#elif defined(VM_METER) - VM_METER -#endif - }; - if (sysctl( -#ifdef SYSCTL_LEGACY_NONCONST_MIB - (int *) -#endif - mib, - ARRAY_LENGTH(mib), &info, &len, NULL, 0) != 0) - return errno; - if (len != sizeof(info)) - return MDBX_ENOSYS; - const intptr_t avail_ram_pages = info.t_free; -#else -#error "FIXME: Get Available RAM" -#endif - if (avail_ram_pages < 1) - return MDBX_ENOSYS; - - return (volume_pages + redundancy_pages >= avail_ram_pages) - ? MDBX_RESULT_FALSE - : MDBX_RESULT_TRUE; -} - -/* Only a subset of the mdbx_env flags can be changed - * at runtime. Changing other flags requires closing the - * environment and re-opening it with the new flags. */ -#define CHANGEABLE \ - (MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | MDBX_MAPASYNC | MDBX_NOMEMINIT | \ - MDBX_COALESCE | MDBX_PAGEPERTURB | MDBX_ACCEDE) -#define CHANGELESS \ - (MDBX_NOSUBDIR | MDBX_RDONLY | MDBX_WRITEMAP | MDBX_NOTLS | MDBX_NORDAHEAD | \ - MDBX_LIFORECLAIM | MDBX_EXCLUSIVE) - -#if VALID_FLAGS & PERSISTENT_FLAGS & (CHANGEABLE | CHANGELESS) -#error "Persistent DB flags & env flags overlap, but both go in mm_flags" -#endif - -int __cold mdbx_env_open(MDBX_env *env, const char *pathname, unsigned flags, - mode_t mode) { - if (unlikely(!env || !pathname)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (flags & ~(CHANGEABLE | CHANGELESS)) - return MDBX_EINVAL; - - if (env->me_lazy_fd != INVALID_HANDLE_VALUE || - (env->me_flags & MDBX_ENV_ACTIVE) != 0) - return MDBX_EPERM; - - size_t len_full, len = strlen(pathname); - if (flags & MDBX_NOSUBDIR) { - len_full = len + sizeof(MDBX_LOCK_SUFFIX) + len + 1; - } else { - len_full = len + sizeof(MDBX_LOCKNAME) + len + sizeof(MDBX_DATANAME); - } - char *lck_pathname = mdbx_malloc(len_full); - if (!lck_pathname) - return MDBX_ENOMEM; - - char *dxb_pathname; - if (flags & MDBX_NOSUBDIR) { - dxb_pathname = lck_pathname + len + sizeof(MDBX_LOCK_SUFFIX); - sprintf(lck_pathname, "%s" MDBX_LOCK_SUFFIX, pathname); - strcpy(dxb_pathname, pathname); - } else { - dxb_pathname = lck_pathname + len + sizeof(MDBX_LOCKNAME); - sprintf(lck_pathname, "%s" MDBX_LOCKNAME, pathname); - sprintf(dxb_pathname, "%s" MDBX_DATANAME, pathname); - } - - int rc = MDBX_SUCCESS; - flags |= env->me_flags; - if (flags & MDBX_RDONLY) { - /* LY: silently ignore irrelevant flags when - * we're only getting read access */ - flags &= - ~(MDBX_WRITEMAP | MDBX_MAPASYNC | MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | - MDBX_COALESCE | MDBX_LIFORECLAIM | MDBX_NOMEMINIT | MDBX_ACCEDE); - } else { -#if MDBX_MMAP_INCOHERENT_FILE_WRITE - /* Temporary `workaround` for OpenBSD kernel's flaw. - * See https://github.com/erthink/libmdbx/issues/67 */ - if ((flags & MDBX_WRITEMAP) == 0) { - if (flags & MDBX_ACCEDE) - flags |= MDBX_WRITEMAP; - else { - mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, - "System (i.e. OpenBSD) requires MDBX_WRITEMAP because " - "of an internal flaw(s) in a file/buffer/page cache.\n"); - rc = 42 /* ENOPROTOOPT */; - goto bailout; - } - } -#endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ - env->me_dirtylist = mdbx_calloc(MDBX_DPL_TXNFULL + 1, sizeof(MDBX_DP)); - if (!env->me_dirtylist) - rc = MDBX_ENOMEM; - } - - const uint32_t saved_me_flags = env->me_flags; - env->me_flags = (flags & ~MDBX_FATAL_ERROR) | MDBX_ENV_ACTIVE; - if (rc) - goto bailout; - - env->me_path = mdbx_strdup(pathname); - env->me_dbxs = mdbx_calloc(env->me_maxdbs, sizeof(MDBX_dbx)); - env->me_dbflags = mdbx_calloc(env->me_maxdbs, sizeof(env->me_dbflags[0])); - env->me_dbiseqs = mdbx_calloc(env->me_maxdbs, sizeof(env->me_dbiseqs[0])); - if (!(env->me_dbxs && env->me_path && env->me_dbflags && env->me_dbiseqs)) { - rc = MDBX_ENOMEM; - goto bailout; - } - env->me_dbxs[FREE_DBI].md_cmp = - mdbx_cmp_int_align4; /* aligned MDBX_INTEGERKEY */ - - if ((flags & (MDBX_RDONLY | MDBX_NOSUBDIR)) == 0 && mode != 0) { -#if defined(_WIN32) || defined(_WIN64) - const size_t wlen = mbstowcs(nullptr, pathname, INT_MAX); - if (wlen < 1 || wlen > /* MAX_PATH */ INT16_MAX) - return ERROR_INVALID_NAME; - wchar_t *const pathnameW = _alloca((wlen + 1) * sizeof(wchar_t)); - if (wlen != mbstowcs(pathnameW, pathname, wlen + 1)) { - rc = ERROR_INVALID_NAME; - goto bailout; - } - if (!CreateDirectoryW(pathnameW, nullptr)) { - rc = GetLastError(); - if (rc != ERROR_ALREADY_EXISTS) - goto bailout; - } -#else - const mode_t dir_mode = - (/* inherit read/write permissions for group and others */ mode & - (S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) | - /* always add read/write/search for owner */ S_IRWXU | - ((mode & S_IRGRP) ? /* +search if readable by group */ S_IXGRP : 0) | - ((mode & S_IROTH) ? /* +search if readable by others */ S_IXOTH : 0); - if (mkdir(pathname, dir_mode)) { - rc = errno; - if (rc != EEXIST) - goto bailout; - } -#endif - } - - rc = mdbx_openfile(F_ISSET(flags, MDBX_RDONLY) ? MDBX_OPEN_DXB_READ - : MDBX_OPEN_DXB_LAZY, - env, dxb_pathname, &env->me_lazy_fd, mode); - if (rc != MDBX_SUCCESS) - goto bailout; - - mdbx_assert(env, env->me_dsync_fd == INVALID_HANDLE_VALUE); - if ((flags & (MDBX_RDONLY | MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC)) == 0) { - rc = mdbx_openfile(MDBX_OPEN_DXB_DSYNC, env, dxb_pathname, - &env->me_dsync_fd, 0); - mdbx_ensure(env, (rc != MDBX_SUCCESS) == - (env->me_dsync_fd == INVALID_HANDLE_VALUE)); - } - -#if MDBX_LOCKING == MDBX_LOCKING_SYSV - env->me_sysv_ipc.key = ftok(dxb_pathname, 42); - if (env->me_sysv_ipc.key == -1) { - rc = errno; - goto bailout; - } -#endif /* MDBX_LOCKING */ - -#if !(defined(_WIN32) || defined(_WIN64)) - if (mode == 0) { - struct stat st; - if (fstat(env->me_lazy_fd, &st)) { - rc = errno; - goto bailout; - } - mode = st.st_mode; - } -#endif /* !Windows */ - - const int lck_rc = mdbx_setup_lck(env, lck_pathname, mode); - if (MDBX_IS_ERROR(lck_rc)) { - rc = lck_rc; - goto bailout; - } - - const unsigned rigorous_flags = - MDBX_WRITEMAP | MDBX_SAFE_NOSYNC | MDBX_MAPASYNC; - const unsigned mode_flags = rigorous_flags | MDBX_NOMETASYNC | - MDBX_LIFORECLAIM | MDBX_COALESCE | MDBX_NORDAHEAD; - - if (env->me_lck && lck_rc != MDBX_RESULT_TRUE && - (env->me_flags & MDBX_RDONLY) == 0) { - while (env->me_lck->mti_envmode == MDBX_RDONLY) { - if (atomic_cas32(&env->me_lck->mti_envmode, MDBX_RDONLY, - env->me_flags & mode_flags)) - break; - atomic_yield(); - } - - if (env->me_flags & MDBX_ACCEDE) { - /* pickup current mode-flags, including MDBX_LIFORECLAIM | - * MDBX_COALESCE | MDBX_NORDAHEAD */ - const unsigned diff = - (env->me_lck->mti_envmode ^ env->me_flags) & mode_flags; - mdbx_notice("accede mode-flags: 0x%X, 0x%X -> 0x%X", diff, env->me_flags, - env->me_flags ^ diff); - env->me_flags ^= diff; - } - - if ((env->me_lck->mti_envmode ^ env->me_flags) & rigorous_flags) { - mdbx_error("%s", "current mode/flags incompatible with requested"); - rc = MDBX_INCOMPATIBLE; - goto bailout; - } - } - - const int dxb_rc = mdbx_setup_dxb(env, lck_rc); - if (MDBX_IS_ERROR(dxb_rc)) { - rc = dxb_rc; - goto bailout; - } - - mdbx_debug("opened dbenv %p", (void *)env); - if (env->me_lck) { - if (lck_rc == MDBX_RESULT_TRUE) { - env->me_lck->mti_envmode = env->me_flags & (mode_flags | MDBX_RDONLY); - rc = mdbx_lck_downgrade(env); - mdbx_debug("lck-downgrade-%s: rc %i", - (env->me_flags & MDBX_EXCLUSIVE) ? "partial" : "full", rc); - if (rc != MDBX_SUCCESS) - goto bailout; - } else { - rc = mdbx_reader_check0(env, false, NULL); - if (MDBX_IS_ERROR(rc)) - goto bailout; - } - - if ((env->me_flags & MDBX_NOTLS) == 0) { - rc = mdbx_rthc_alloc(&env->me_txkey, &env->me_lck->mti_readers[0], - &env->me_lck->mti_readers[env->me_maxreaders]); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - env->me_flags |= MDBX_ENV_TXKEY; - } - } - - if ((flags & MDBX_RDONLY) == 0) { - const size_t tsize = sizeof(MDBX_txn), - size = tsize + env->me_maxdbs * - (sizeof(MDBX_db) + sizeof(MDBX_cursor *) + - sizeof(unsigned) + 1); - rc = mdbx_memalign_alloc( - env->me_os_psize, - env->me_psize * (1 /* page buffer */ + 1 /* page killer bufer */), - &env->me_pbuf); - if (rc == MDBX_SUCCESS) { - memset(env->me_pbuf, -1, env->me_psize * 2); - MDBX_txn *txn = mdbx_calloc(1, size); - if (txn) { - txn->mt_dbs = (MDBX_db *)((char *)txn + tsize); - txn->mt_cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = (unsigned *)(txn->mt_cursors + env->me_maxdbs); - txn->mt_dbflags = (uint8_t *)(txn->mt_dbiseqs + env->me_maxdbs); - txn->mt_env = env; - txn->mt_dbxs = env->me_dbxs; - txn->mt_flags = MDBX_TXN_FINISHED; - env->me_txn0 = txn; - txn->tw.retired_pages = mdbx_pnl_alloc(MDBX_PNL_INITIAL); - txn->tw.reclaimed_pglist = mdbx_pnl_alloc(MDBX_PNL_INITIAL); - if (!txn->tw.retired_pages || !txn->tw.reclaimed_pglist) - rc = MDBX_ENOMEM; - } else - rc = MDBX_ENOMEM; - } - } - -#if MDBX_DEBUG - if (rc == MDBX_SUCCESS) { - MDBX_meta *meta = mdbx_meta_head(env); - MDBX_db *db = &meta->mm_dbs[MAIN_DBI]; - - mdbx_debug("opened database version %u, pagesize %u", - (uint8_t)meta->mm_magic_and_version, env->me_psize); - mdbx_debug("using meta page %" PRIaPGNO ", txn %" PRIaTXN, - data_page(meta)->mp_pgno, mdbx_meta_txnid_fluid(env, meta)); - mdbx_debug("depth: %u", db->md_depth); - mdbx_debug("entries: %" PRIu64, db->md_entries); - mdbx_debug("branch pages: %" PRIaPGNO, db->md_branch_pages); - mdbx_debug("leaf pages: %" PRIaPGNO, db->md_leaf_pages); - mdbx_debug("overflow pages: %" PRIaPGNO, db->md_overflow_pages); - mdbx_debug("root: %" PRIaPGNO, db->md_root); - mdbx_debug("schema_altered: %" PRIaTXN, db->md_mod_txnid); - } -#endif - -bailout: -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - mdbx_txn_valgrind(env, nullptr); -#endif - if (rc) { - rc = mdbx_env_close0(env) ? MDBX_PANIC : rc; - env->me_flags = saved_me_flags | MDBX_FATAL_ERROR; - } - mdbx_free(lck_pathname); - return rc; -} - -/* Destroy resources from mdbx_env_open(), clear our readers & DBIs */ -static int __cold mdbx_env_close0(MDBX_env *env) { - if (!(env->me_flags & MDBX_ENV_ACTIVE)) { - mdbx_ensure(env, env->me_lcklist_next == nullptr); - return MDBX_SUCCESS; - } - - env->me_flags &= ~MDBX_ENV_ACTIVE; - env->me_oldest = nullptr; - env->me_sync_timestamp = nullptr; - env->me_autosync_period = nullptr; - env->me_unsynced_pages = nullptr; - env->me_autosync_threshold = nullptr; - env->me_discarded_tail = nullptr; - env->me_meta_sync_txnid = nullptr; - if (env->me_flags & MDBX_ENV_TXKEY) - mdbx_rthc_remove(env->me_txkey); - - lcklist_lock(); - const int rc = lcklist_detach_locked(env); - lcklist_unlock(); - - if (env->me_map) { - mdbx_munmap(&env->me_dxb_mmap); -#ifdef MDBX_USE_VALGRIND - VALGRIND_DISCARD(env->me_valgrind_handle); - env->me_valgrind_handle = -1; -#endif - } - - if (env->me_dsync_fd != INVALID_HANDLE_VALUE) { - (void)mdbx_closefile(env->me_dsync_fd); - env->me_dsync_fd = INVALID_HANDLE_VALUE; - } - - if (env->me_lazy_fd != INVALID_HANDLE_VALUE) { - (void)mdbx_closefile(env->me_lazy_fd); - env->me_lazy_fd = INVALID_HANDLE_VALUE; - } - - if (env->me_lck) - mdbx_munmap(&env->me_lck_mmap); - - if (env->me_lfd != INVALID_HANDLE_VALUE) { - (void)mdbx_closefile(env->me_lfd); - env->me_lfd = INVALID_HANDLE_VALUE; - } - - if (env->me_dbxs) { - for (unsigned i = env->me_numdbs; --i >= CORE_DBS;) - mdbx_free(env->me_dbxs[i].md_name.iov_base); - mdbx_free(env->me_dbxs); - } - mdbx_memalign_free(env->me_pbuf); - mdbx_free(env->me_dbiseqs); - mdbx_free(env->me_dbflags); - mdbx_free(env->me_path); - mdbx_free(env->me_dirtylist); - if (env->me_txn0) { - mdbx_txl_free(env->me_txn0->tw.lifo_reclaimed); - mdbx_pnl_free(env->me_txn0->tw.retired_pages); - mdbx_pnl_free(env->me_txn0->tw.spill_pages); - mdbx_pnl_free(env->me_txn0->tw.reclaimed_pglist); - mdbx_free(env->me_txn0); - } - env->me_flags = 0; - return rc; -} - -int __cold mdbx_env_close_ex(MDBX_env *env, int dont_sync) { - MDBX_page *dp; - int rc = MDBX_SUCCESS; - - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_TXN_CHECKPID || !(defined(_WIN32) || defined(_WIN64)) - /* Check the PID even if MDBX_TXN_CHECKPID=0 on non-Windows - * platforms (i.e. where fork() is available). - * This is required to legitimize a call after fork() - * from a child process, that should be allowed to free resources. */ - if (unlikely(env->me_pid != mdbx_getpid())) - env->me_flags |= MDBX_FATAL_ERROR; -#endif /* MDBX_TXN_CHECKPID */ - - if ((env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR)) == 0 && env->me_txn0) { - if (env->me_txn0->mt_owner && env->me_txn0->mt_owner != mdbx_thread_self()) - return MDBX_BUSY; - if (!dont_sync) { -#if defined(_WIN32) || defined(_WIN64) - /* On windows, without blocking is impossible to determine whether another - * process is running a writing transaction or not. - * Because in the "owner died" condition kernel don't release - * file lock immediately. */ - rc = mdbx_env_sync_ex(env, true, false); - rc = (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc; -#else - struct stat st; - if (unlikely(fstat(env->me_lazy_fd, &st))) - rc = errno; - else if (st.st_nlink > 0 /* don't sync deleted files */) { - rc = mdbx_env_sync_ex(env, true, true); - rc = (rc == MDBX_BUSY || rc == EAGAIN || rc == EACCES || rc == EBUSY || - rc == EWOULDBLOCK || rc == MDBX_RESULT_TRUE) - ? MDBX_SUCCESS - : rc; - } -#endif - } - } - - while ((dp = env->me_dpages) != NULL) { - ASAN_UNPOISON_MEMORY_REGION(&dp->mp_next, sizeof(dp->mp_next)); - VALGRIND_MAKE_MEM_DEFINED(&dp->mp_next, sizeof(dp->mp_next)); - env->me_dpages = dp->mp_next; - mdbx_free(dp); - } - VALGRIND_DESTROY_MEMPOOL(env); - - rc = mdbx_env_close0(env) ? MDBX_PANIC : rc; - mdbx_ensure(env, mdbx_fastmutex_destroy(&env->me_dbi_lock) == MDBX_SUCCESS); -#if defined(_WIN32) || defined(_WIN64) - /* me_remap_guard don't have destructor (Slim Reader/Writer Lock) */ - DeleteCriticalSection(&env->me_windowsbug_lock); -#else - mdbx_ensure(env, - mdbx_fastmutex_destroy(&env->me_remap_guard) == MDBX_SUCCESS); -#endif /* Windows */ - -#if MDBX_LOCKING > MDBX_LOCKING_SYSV - mdbx_ensure(env, mdbx_ipclock_destroy(&env->me_lckless_stub.wlock) == 0); -#endif /* MDBX_LOCKING */ - - mdbx_ensure(env, env->me_lcklist_next == nullptr); - env->me_pid = 0; - env->me_signature = 0; - mdbx_free(env); - - return rc; -} - -__cold int mdbx_env_close(MDBX_env *env) { - return mdbx_env_close_ex(env, false); -} - -/* Compare two items pointing at aligned unsigned int's. */ -static int __hot mdbx_cmp_int_align4(const MDBX_val *a, const MDBX_val *b) { - mdbx_assert(NULL, a->iov_len == b->iov_len); - switch (a->iov_len) { - case 4: - return CMP2INT(unaligned_peek_u32(4, a->iov_base), - unaligned_peek_u32(4, b->iov_base)); - case 8: - return CMP2INT(unaligned_peek_u64(4, a->iov_base), - unaligned_peek_u64(4, b->iov_base)); - default: - mdbx_assert_fail(NULL, "invalid size for INTEGERKEY/INTEGERDUP", __func__, - __LINE__); - return 0; - } -} - -/* Compare two items pointing at 2-byte aligned unsigned int's. */ -static int __hot mdbx_cmp_int_align2(const MDBX_val *a, const MDBX_val *b) { - mdbx_assert(NULL, a->iov_len == b->iov_len); - switch (a->iov_len) { - case 4: - return CMP2INT(unaligned_peek_u32(2, a->iov_base), - unaligned_peek_u32(2, b->iov_base)); - case 8: - return CMP2INT(unaligned_peek_u64(2, a->iov_base), - unaligned_peek_u64(2, b->iov_base)); - default: - mdbx_assert_fail(NULL, "invalid size for INTEGERKEY/INTEGERDUP", __func__, - __LINE__); - return 0; - } -} - -/* Compare two items pointing at unsigneds of unknown alignment. - * - * This is also set as MDBX_INTEGERDUP|MDBX_DUPFIXED's MDBX_dbx.md_dcmp. */ -static int __hot mdbx_cmp_int_unaligned(const MDBX_val *a, const MDBX_val *b) { - mdbx_assert(NULL, a->iov_len == b->iov_len); - switch (a->iov_len) { - case 4: - return CMP2INT(unaligned_peek_u32(1, a->iov_base), - unaligned_peek_u32(1, b->iov_base)); - case 8: - return CMP2INT(unaligned_peek_u64(1, a->iov_base), - unaligned_peek_u64(1, b->iov_base)); - default: - mdbx_assert_fail(NULL, "invalid size for INTEGERKEY/INTEGERDUP", __func__, - __LINE__); - return 0; - } -} - -/* Compare two items lexically */ -static int __hot mdbx_cmp_memn(const MDBX_val *a, const MDBX_val *b) { - if (a->iov_len == b->iov_len) - return memcmp(a->iov_base, b->iov_base, a->iov_len); - - const int diff_len = (a->iov_len < b->iov_len) ? -1 : 1; - const size_t shortest = (a->iov_len < b->iov_len) ? a->iov_len : b->iov_len; - int diff_data = memcmp(a->iov_base, b->iov_base, shortest); - return likely(diff_data) ? diff_data : diff_len; -} - -/* Compare two items in reverse byte order */ -static int __hot mdbx_cmp_memnr(const MDBX_val *a, const MDBX_val *b) { - const uint8_t *pa = (const uint8_t *)a->iov_base + a->iov_len; - const uint8_t *pb = (const uint8_t *)b->iov_base + b->iov_len; - const size_t shortest = (a->iov_len < b->iov_len) ? a->iov_len : b->iov_len; - - const uint8_t *const end = pa - shortest; - while (pa != end) { - int diff = *--pa - *--pb; - if (likely(diff)) - return diff; - } - return CMP2INT(a->iov_len, b->iov_len); -} - -/* Search for key within a page, using binary search. - * Returns the smallest entry larger or equal to the key. - * If exactp is non-null, stores whether the found entry was an exact match - * in *exactp (1 or 0). - * Updates the cursor index with the index of the found entry. - * If no entry larger or equal to the key is found, returns NULL. */ -static MDBX_node *__hot mdbx_node_search(MDBX_cursor *mc, MDBX_val *key, - int *exactp) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - const int nkeys = page_numkeys(mp); - DKBUF; - - mdbx_debug("searching %u keys in %s %spage %" PRIaPGNO, nkeys, - IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "", - mp->mp_pgno); - - int low = IS_LEAF(mp) ? 0 : 1; - int high = nkeys - 1; - *exactp = 0; - if (unlikely(high < low)) { - mc->mc_ki[mc->mc_top] = 0; - return NULL; - } - - int rc = 0, i = 0; - MDBX_cmp_func *cmp = mc->mc_dbx->md_cmp; - MDBX_val nodekey; - if (unlikely(IS_LEAF2(mp))) { - mdbx_cassert(mc, mp->mp_leaf2_ksize == mc->mc_db->md_xsize); - nodekey.iov_len = mp->mp_leaf2_ksize; - do { - i = (low + high) >> 1; - nodekey.iov_base = page_leaf2key(mp, i, nodekey.iov_len); - mdbx_cassert(mc, (char *)mp + mc->mc_txn->mt_env->me_psize >= - (char *)nodekey.iov_base + nodekey.iov_len); - rc = cmp(key, &nodekey); - mdbx_debug("found leaf index %u [%s], rc = %i", i, DKEY(&nodekey), rc); - if (unlikely(rc == 0)) { - *exactp = 1; - break; - } - low = (rc < 0) ? low : i + 1; - high = (rc < 0) ? i - 1 : high; - } while (likely(low <= high)); - - /* Found entry is less than the key. */ - /* Skip to get the smallest entry larger than key. */ - i += rc > 0; - - /* store the key index */ - mc->mc_ki[mc->mc_top] = (indx_t)i; - return (i < nkeys) - ? /* fake for LEAF2 */ (MDBX_node *)(intptr_t)-1 - : /* There is no entry larger or equal to the key. */ NULL; - } - - if (cmp == mdbx_cmp_int_align2 && IS_BRANCH(mp)) - /* Branch pages have no data, so if using integer keys, - * alignment is guaranteed. Use faster mdbx_cmp_int_align4(). */ - cmp = mdbx_cmp_int_align4; - - MDBX_node *node; - do { - i = (low + high) >> 1; - - node = page_node(mp, i); - nodekey.iov_len = node_ks(node); - nodekey.iov_base = node_key(node); - mdbx_cassert(mc, (char *)mp + mc->mc_txn->mt_env->me_psize >= - (char *)nodekey.iov_base + nodekey.iov_len); - - rc = cmp(key, &nodekey); - if (IS_LEAF(mp)) - mdbx_debug("found leaf index %u [%s], rc = %i", i, DKEY(&nodekey), rc); - else - mdbx_debug("found branch index %u [%s -> %" PRIaPGNO "], rc = %i", i, - DKEY(&nodekey), node_pgno(node), rc); - if (unlikely(rc == 0)) { - *exactp = 1; - break; - } - low = (rc < 0) ? low : i + 1; - high = (rc < 0) ? i - 1 : high; - } while (likely(low <= high)); - - /* Found entry is less than the key. */ - /* Skip to get the smallest entry larger than key. */ - i += rc > 0; - - /* store the key index */ - mc->mc_ki[mc->mc_top] = (indx_t)i; - return (i < nkeys) ? page_node(mp, i) - : /* There is no entry larger or equal to the key. */ NULL; -} - -#if 0 /* unused for now */ -static void mdbx_cursor_adjust(MDBX_cursor *mc, func) { - MDBX_cursor *m2; - - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2 = m2->mc_next) { - if (m2->mc_pg[m2->mc_top] == mc->mc_pg[mc->mc_top]) { - func(mc, m2); - } - } -} -#endif - -/* Pop a page off the top of the cursor's stack. */ -static void mdbx_cursor_pop(MDBX_cursor *mc) { - if (mc->mc_snum) { - mdbx_debug("popped page %" PRIaPGNO " off db %d cursor %p", - mc->mc_pg[mc->mc_top]->mp_pgno, DDBI(mc), (void *)mc); - - mc->mc_snum--; - if (mc->mc_snum) { - mc->mc_top--; - } else { - mc->mc_flags &= ~C_INITIALIZED; - } - } -} - -/* Push a page onto the top of the cursor's stack. - * Set MDBX_TXN_ERROR on failure. */ -static int mdbx_cursor_push(MDBX_cursor *mc, MDBX_page *mp) { - mdbx_debug("pushing page %" PRIaPGNO " on db %d cursor %p", mp->mp_pgno, - DDBI(mc), (void *)mc); - - if (unlikely(mc->mc_snum >= CURSOR_STACK)) { - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_CURSOR_FULL; - } - - mdbx_cassert(mc, mc->mc_snum < UINT16_MAX); - mc->mc_top = mc->mc_snum++; - mc->mc_pg[mc->mc_top] = mp; - mc->mc_ki[mc->mc_top] = 0; - - return MDBX_SUCCESS; -} - -/* Find the address of the page corresponding to a given page number. - * Set MDBX_TXN_ERROR on failure. - * - * [in] mc the cursor accessing the page. - * [in] pgno the page number for the page to retrieve. - * [out] ret address of a pointer where the page's address will be - * stored. - * [out] lvl dirtylist inheritance level of found page. 1=current txn, - * 0=mapped page. - * - * Returns 0 on success, non-zero on failure. */ -__hot static int mdbx_page_get(MDBX_cursor *mc, pgno_t pgno, MDBX_page **ret, - int *lvl) { - MDBX_txn *txn = mc->mc_txn; - if (unlikely(pgno >= txn->mt_next_pgno)) { - mdbx_debug("page %" PRIaPGNO " not found", pgno); - goto corrupted; - } - - MDBX_env *const env = txn->mt_env; - MDBX_page *p = NULL; - int level; - mdbx_assert(env, ((txn->mt_flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); - const uint16_t illegal_bits = (txn->mt_flags & MDBX_RDONLY) - ? P_LOOSE | P_SUBP | P_META | P_DIRTY - : P_LOOSE | P_SUBP | P_META; - const uint64_t txnid = txn->mt_txnid; - if (unlikely((txn->mt_flags & (MDBX_RDONLY | MDBX_WRITEMAP)) == 0)) { - level = 1; - do { - /* Spilled pages were dirtied in this txn and flushed - * because the dirty list got full. Bring this page - * back in from the map (but don't unspill it here, - * leave that unless page_touch happens again). */ - if (txn->tw.spill_pages && mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1)) - goto spilled; - p = mdbx_dpl_find(txn->tw.dirtylist, pgno); - if (p) - goto dirty; - level++; - } while ((txn = txn->mt_parent) != NULL); - } - level = 0; - -spilled: - p = pgno2page(env, pgno); - -dirty: - if (unlikely(p->mp_pgno != pgno)) { - mdbx_error("mismatch pgno %" PRIaPGNO " (actual) != %" PRIaPGNO - " (expected)", - p->mp_pgno, pgno); - goto corrupted; - } - - if (unlikely((p->mp_flags & illegal_bits) != 0 || - p->mp_txnid > ((p->mp_flags & P_DIRTY) ? UINT64_MAX : txnid))) { - mdbx_error("invalid page's flags (0x%x) or txnid %" PRIaTXN - " > (actual) %" PRIaTXN " (expected)", - p->mp_flags, p->mp_txnid, mc->mc_txn->mt_txnid); - goto corrupted; - } - - if (unlikely((p->mp_upper < p->mp_lower || - ((p->mp_lower | p->mp_upper) & 1) != 0 || - PAGEHDRSZ + p->mp_upper > env->me_psize) && - !IS_OVERFLOW(p))) { - mdbx_error("invalid page lower(%u)/upper(%u), pg-limit %u", p->mp_lower, - p->mp_upper, page_space(env)); - goto corrupted; - } - - if (mdbx_audit_enabled()) { - int err = mdbx_page_check(env, p, true); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - - *(lvl ? lvl : &level) = level; - *ret = p; - return MDBX_SUCCESS; - -corrupted: - txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_CORRUPTED; -} - -/* Finish mdbx_page_search() / mdbx_page_search_lowest(). - * The cursor is at the root page, set up the rest of it. */ -__hot static int mdbx_page_search_root(MDBX_cursor *mc, MDBX_val *key, - int flags) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - int rc; - DKBUF; - - while (IS_BRANCH(mp)) { - MDBX_node *node; - int i; - - mdbx_debug("branch page %" PRIaPGNO " has %u keys", mp->mp_pgno, - page_numkeys(mp)); - /* Don't assert on branch pages in the GC. We can get here - * while in the process of rebalancing a GC branch page; we must - * let that proceed. ITS#8336 */ - mdbx_cassert(mc, !mc->mc_dbi || page_numkeys(mp) > 1); - mdbx_debug("found index 0 to page %" PRIaPGNO, node_pgno(page_node(mp, 0))); - - if (flags & (MDBX_PS_FIRST | MDBX_PS_LAST)) { - i = 0; - if (flags & MDBX_PS_LAST) { - i = page_numkeys(mp) - 1; - /* if already init'd, see if we're already in right place */ - if (mc->mc_flags & C_INITIALIZED) { - if (mc->mc_ki[mc->mc_top] == i) { - mc->mc_top = mc->mc_snum++; - mp = mc->mc_pg[mc->mc_top]; - goto ready; - } - } - } - } else { - int exact; - node = mdbx_node_search(mc, key, &exact); - if (node == NULL) - i = page_numkeys(mp) - 1; - else { - i = mc->mc_ki[mc->mc_top]; - if (!exact) { - mdbx_cassert(mc, i > 0); - i--; - } - } - mdbx_debug("following index %u for key [%s]", i, DKEY(key)); - } - - mdbx_cassert(mc, i < (int)page_numkeys(mp)); - node = page_node(mp, i); - - if (unlikely((rc = mdbx_page_get(mc, node_pgno(node), &mp, NULL)) != 0)) - return rc; - - mc->mc_ki[mc->mc_top] = (indx_t)i; - if (unlikely(rc = mdbx_cursor_push(mc, mp))) - return rc; - - ready: - if (flags & MDBX_PS_MODIFY) { - if (unlikely((rc = mdbx_page_touch(mc)) != 0)) - return rc; - mp = mc->mc_pg[mc->mc_top]; - } - } - - if (unlikely(!IS_LEAF(mp))) { - mdbx_debug("internal error, index points to a page with 0x%02x flags!?", - mp->mp_flags); - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_CORRUPTED; - } - - mdbx_debug("found leaf page %" PRIaPGNO " for key [%s]", mp->mp_pgno, - DKEY(key)); - mc->mc_flags |= C_INITIALIZED; - mc->mc_flags &= ~C_EOF; - - return MDBX_SUCCESS; -} - -static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) { - MDBX_cursor mc; - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) - return MDBX_BAD_DBI; - int rc = mdbx_cursor_init(&mc, txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_page_search(&mc, &txn->mt_dbxs[dbi].md_name, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return (rc == MDBX_NOTFOUND) ? MDBX_BAD_DBI : rc; - - MDBX_val data; - int exact = 0; - MDBX_node *node = mdbx_node_search(&mc, &txn->mt_dbxs[dbi].md_name, &exact); - if (unlikely(!exact)) - return MDBX_BAD_DBI; - if (unlikely((node_flags(node) & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA)) - return MDBX_INCOMPATIBLE; /* not a named DB */ - rc = mdbx_node_read(&mc, node, &data); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(data.iov_len < sizeof(MDBX_db))) - return MDBX_INCOMPATIBLE; /* not a named DB */ - - uint16_t md_flags = UNALIGNED_PEEK_16(data.iov_base, MDBX_db, md_flags); - /* The txn may not know this DBI, or another process may - * have dropped and recreated the DB with other flags. */ - if (unlikely((txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS) != md_flags)) - return MDBX_INCOMPATIBLE; - - memcpy(&txn->mt_dbs[dbi], data.iov_base, sizeof(MDBX_db)); - txn->mt_dbflags[dbi] &= ~DB_STALE; - return MDBX_SUCCESS; -} - -/* Search for the lowest key under the current branch page. - * This just bypasses a numkeys check in the current page - * before calling mdbx_page_search_root(), because the callers - * are all in situations where the current page is known to - * be underfilled. */ -__hot static int mdbx_page_search_lowest(MDBX_cursor *mc) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - mdbx_cassert(mc, IS_BRANCH(mp)); - MDBX_node *node = page_node(mp, 0); - int rc; - - if (unlikely((rc = mdbx_page_get(mc, node_pgno(node), &mp, NULL)) != 0)) - return rc; - - mc->mc_ki[mc->mc_top] = 0; - if (unlikely(rc = mdbx_cursor_push(mc, mp))) - return rc; - return mdbx_page_search_root(mc, NULL, MDBX_PS_FIRST); -} - -/* Search for the page a given key should be in. - * Push it and its parent pages on the cursor stack. - * - * [in,out] mc the cursor for this operation. - * [in] key the key to search for, or NULL for first/last page. - * [in] flags If MDBX_PS_MODIFY is set, visited pages in the DB - * are touched (updated with new page numbers). - * If MDBX_PS_FIRST or MDBX_PS_LAST is set, find first or last - * leaf. - * This is used by mdbx_cursor_first() and mdbx_cursor_last(). - * If MDBX_PS_ROOTONLY set, just fetch root node, no further - * lookups. - * - * Returns 0 on success, non-zero on failure. */ -__hot static int mdbx_page_search(MDBX_cursor *mc, MDBX_val *key, int flags) { - int rc; - pgno_t root; - - /* Make sure the txn is still viable, then find the root from - * the txn's db table and set it as the root of the cursor's stack. */ - if (unlikely(mc->mc_txn->mt_flags & MDBX_TXN_BLOCKED)) { - mdbx_debug("%s", "transaction has failed, must abort"); - return MDBX_BAD_TXN; - } - - /* Make sure we're using an up-to-date root */ - if (unlikely(*mc->mc_dbflag & DB_STALE)) { - rc = mdbx_fetch_sdb(mc->mc_txn, mc->mc_dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - root = mc->mc_db->md_root; - - if (unlikely(root == P_INVALID)) { /* Tree is empty. */ - mdbx_debug("%s", "tree is empty"); - return MDBX_NOTFOUND; - } - - mdbx_cassert(mc, root >= NUM_METAS); - if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root) - if (unlikely((rc = mdbx_page_get(mc, root, &mc->mc_pg[0], NULL)) != 0)) - return rc; - - mc->mc_snum = 1; - mc->mc_top = 0; - - mdbx_debug("db %d root page %" PRIaPGNO " has flags 0x%X", DDBI(mc), root, - mc->mc_pg[0]->mp_flags); - - if (flags & MDBX_PS_MODIFY) { - if (unlikely(rc = mdbx_page_touch(mc))) - return rc; - } - - if (flags & MDBX_PS_ROOTONLY) - return MDBX_SUCCESS; - - return mdbx_page_search_root(mc, key, flags); -} - -/* Return the data associated with a given node. - * - * [in] mc The cursor for this operation. - * [in] leaf The node being read. - * [out] data Updated to point to the node's data. - * - * Returns 0 on success, non-zero on failure. */ -static __always_inline int mdbx_node_read(MDBX_cursor *mc, MDBX_node *node, - MDBX_val *data) { - data->iov_len = node_ds(node); - data->iov_base = node_data(node); - if (unlikely(F_ISSET(node_flags(node), F_BIGDATA))) { - /* Read overflow data. */ - MDBX_page *omp; /* overflow page */ - int rc = mdbx_page_get(mc, node_largedata_pgno(node), &omp, NULL); - if (unlikely((rc != MDBX_SUCCESS))) { - mdbx_debug("read overflow page %" PRIaPGNO " failed", - node_largedata_pgno(node)); - return rc; - } - data->iov_base = page_data(omp); - } - return MDBX_SUCCESS; -} - -int mdbx_get(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data) { - DKBUF; - mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key)); - - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!key || !data)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - MDBX_cursor_couple cx; - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - int exact = 0; - return mdbx_cursor_set(&cx.outer, key, data, MDBX_SET, &exact); -} - -int mdbx_get_nearest(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, - MDBX_val *data) { - DKBUF; - mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key)); - - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!key || !data)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED)) - return MDBX_BAD_TXN; - - MDBX_cursor_couple cx; - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - MDBX_val save_data = *data; - int exact = 0; - rc = mdbx_cursor_set(&cx.outer, key, data, MDBX_SET_RANGE, &exact); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (exact && (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) != 0) { - *data = save_data; - exact = 0; - rc = mdbx_cursor_set(&cx.outer, key, data, MDBX_GET_BOTH_RANGE, &exact); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - return exact ? MDBX_SUCCESS : MDBX_RESULT_TRUE; -} - -int mdbx_get_ex(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, - size_t *values_count) { - DKBUF; - mdbx_debug("===> get db %u key [%s]", dbi, DKEY(key)); - - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!key || !data)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - MDBX_cursor_couple cx; - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - int exact = 0; - rc = mdbx_cursor_set(&cx.outer, key, data, MDBX_SET_KEY, &exact); - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc == MDBX_NOTFOUND && values_count) - *values_count = 0; - return rc; - } - - if (values_count) { - *values_count = 1; - if (cx.outer.mc_xcursor != NULL) { - MDBX_node *node = page_node(cx.outer.mc_pg[cx.outer.mc_top], - cx.outer.mc_ki[cx.outer.mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - mdbx_tassert(txn, cx.outer.mc_xcursor == &cx.inner && - (cx.inner.mx_cursor.mc_flags & C_INITIALIZED)); - *values_count = - (sizeof(*values_count) >= sizeof(cx.inner.mx_db.md_entries) || - cx.inner.mx_db.md_entries <= PTRDIFF_MAX) - ? (size_t)cx.inner.mx_db.md_entries - : PTRDIFF_MAX; - } - } - } - return MDBX_SUCCESS; -} - -/* Find a sibling for a page. - * Replaces the page at the top of the cursor's stack with the specified - * sibling, if one exists. - * - * [in] mc The cursor for this operation. - * [in] move_right Non-zero if the right sibling is requested, - * otherwise the left sibling. - * - * Returns 0 on success, non-zero on failure. */ -static int mdbx_cursor_sibling(MDBX_cursor *mc, int move_right) { - int rc; - MDBX_node *indx; - MDBX_page *mp; - - if (unlikely(mc->mc_snum < 2)) - return MDBX_NOTFOUND; /* root has no siblings */ - - mdbx_cursor_pop(mc); - mdbx_debug("parent page is page %" PRIaPGNO ", index %u", - mc->mc_pg[mc->mc_top]->mp_pgno, mc->mc_ki[mc->mc_top]); - - if (move_right - ? (mc->mc_ki[mc->mc_top] + 1u >= page_numkeys(mc->mc_pg[mc->mc_top])) - : (mc->mc_ki[mc->mc_top] == 0)) { - mdbx_debug("no more keys left, moving to %s sibling", - move_right ? "right" : "left"); - if (unlikely((rc = mdbx_cursor_sibling(mc, move_right)) != MDBX_SUCCESS)) { - /* undo cursor_pop before returning */ - mc->mc_top++; - mc->mc_snum++; - return rc; - } - } else { - if (move_right) - mc->mc_ki[mc->mc_top]++; - else - mc->mc_ki[mc->mc_top]--; - mdbx_debug("just moving to %s index key %u", move_right ? "right" : "left", - mc->mc_ki[mc->mc_top]); - } - mdbx_cassert(mc, IS_BRANCH(mc->mc_pg[mc->mc_top])); - - indx = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (unlikely((rc = mdbx_page_get(mc, node_pgno(indx), &mp, NULL)) != 0)) { - /* mc will be inconsistent if caller does mc_snum++ as above */ - mc->mc_flags &= ~(C_INITIALIZED | C_EOF); - return rc; - } - - rc = mdbx_cursor_push(mc, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if (!move_right) - mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mp) - 1; - - return MDBX_SUCCESS; -} - -/* Move the cursor to the next data item. */ -static int mdbx_cursor_next(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, - MDBX_cursor_op op) { - MDBX_page *mp; - MDBX_node *node; - int rc; - - if ((mc->mc_flags & C_DEL) && op == MDBX_NEXT_DUP) - return MDBX_NOTFOUND; - - if (!(mc->mc_flags & C_INITIALIZED)) - return mdbx_cursor_first(mc, key, data); - - mp = mc->mc_pg[mc->mc_top]; - if (mc->mc_flags & C_EOF) { - if (mc->mc_ki[mc->mc_top] + 1u >= page_numkeys(mp)) - return MDBX_NOTFOUND; - mc->mc_flags ^= C_EOF; - } - - if (mc->mc_db->md_flags & MDBX_DUPSORT) { - node = page_node(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - if (op == MDBX_NEXT || op == MDBX_NEXT_DUP) { - rc = - mdbx_cursor_next(&mc->mc_xcursor->mx_cursor, data, NULL, MDBX_NEXT); - if (op != MDBX_NEXT || rc != MDBX_NOTFOUND) { - if (likely(rc == MDBX_SUCCESS)) - get_key_optional(node, key); - return rc; - } - } - } else { - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - if (op == MDBX_NEXT_DUP) - return MDBX_NOTFOUND; - } - } - - mdbx_debug("cursor_next: top page is %" PRIaPGNO " in cursor %p", mp->mp_pgno, - (void *)mc); - if (mc->mc_flags & C_DEL) { - mc->mc_flags ^= C_DEL; - goto skip; - } - - if (mc->mc_ki[mc->mc_top] + 1u >= page_numkeys(mp)) { - mdbx_debug("%s", "=====> move to next sibling page"); - if (unlikely((rc = mdbx_cursor_sibling(mc, 1)) != MDBX_SUCCESS)) { - mc->mc_flags |= C_EOF; - return rc; - } - mp = mc->mc_pg[mc->mc_top]; - mdbx_debug("next page is %" PRIaPGNO ", key index %u", mp->mp_pgno, - mc->mc_ki[mc->mc_top]); - } else - mc->mc_ki[mc->mc_top]++; - -skip: - mdbx_debug("==> cursor points to page %" PRIaPGNO - " with %u keys, key index %u", - mp->mp_pgno, page_numkeys(mp), mc->mc_ki[mc->mc_top]); - - if (IS_LEAF2(mp)) { - if (likely(key)) { - key->iov_len = mc->mc_db->md_xsize; - key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); - } - return MDBX_SUCCESS; - } - - mdbx_cassert(mc, IS_LEAF(mp)); - node = page_node(mp, mc->mc_ki[mc->mc_top]); - - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - if (data) { - if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) - return rc; - - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - } - - get_key_optional(node, key); - return MDBX_SUCCESS; -} - -/* Move the cursor to the previous data item. */ -static int mdbx_cursor_prev(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, - MDBX_cursor_op op) { - MDBX_page *mp; - MDBX_node *node; - int rc; - - if ((mc->mc_flags & C_DEL) && op == MDBX_PREV_DUP) - return MDBX_NOTFOUND; - - if (!(mc->mc_flags & C_INITIALIZED)) { - rc = mdbx_cursor_last(mc, key, data); - if (unlikely(rc)) - return rc; - mc->mc_ki[mc->mc_top]++; - } - - mp = mc->mc_pg[mc->mc_top]; - if ((mc->mc_db->md_flags & MDBX_DUPSORT) && - mc->mc_ki[mc->mc_top] < page_numkeys(mp)) { - node = page_node(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - if (op == MDBX_PREV || op == MDBX_PREV_DUP) { - rc = - mdbx_cursor_prev(&mc->mc_xcursor->mx_cursor, data, NULL, MDBX_PREV); - if (op != MDBX_PREV || rc != MDBX_NOTFOUND) { - if (likely(rc == MDBX_SUCCESS)) { - get_key_optional(node, key); - mc->mc_flags &= ~C_EOF; - } - return rc; - } - } - } else { - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - if (op == MDBX_PREV_DUP) - return MDBX_NOTFOUND; - } - } - - mdbx_debug("cursor_prev: top page is %" PRIaPGNO " in cursor %p", mp->mp_pgno, - (void *)mc); - - mc->mc_flags &= ~(C_EOF | C_DEL); - - if (mc->mc_ki[mc->mc_top] == 0) { - mdbx_debug("%s", "=====> move to prev sibling page"); - if ((rc = mdbx_cursor_sibling(mc, 0)) != MDBX_SUCCESS) { - return rc; - } - mp = mc->mc_pg[mc->mc_top]; - mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mp) - 1; - mdbx_debug("prev page is %" PRIaPGNO ", key index %u", mp->mp_pgno, - mc->mc_ki[mc->mc_top]); - } else - mc->mc_ki[mc->mc_top]--; - - mdbx_debug("==> cursor points to page %" PRIaPGNO - " with %u keys, key index %u", - mp->mp_pgno, page_numkeys(mp), mc->mc_ki[mc->mc_top]); - - if (IS_LEAF2(mp)) { - if (likely(key)) { - key->iov_len = mc->mc_db->md_xsize; - key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); - } - return MDBX_SUCCESS; - } - - mdbx_cassert(mc, IS_LEAF(mp)); - node = page_node(mp, mc->mc_ki[mc->mc_top]); - - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - if (data) { - if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) - return rc; - - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - } - - get_key_optional(node, key); - return MDBX_SUCCESS; -} - -/* Set the cursor on a specific data item. */ -static int mdbx_cursor_set(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, - MDBX_cursor_op op, int *exactp) { - int rc; - MDBX_page *mp; - MDBX_node *node = NULL; - int stub_exactp; - DKBUF; - - exactp = exactp ? exactp : &stub_exactp; - - if ((mc->mc_db->md_flags & MDBX_INTEGERKEY) && - unlikely(key->iov_len != sizeof(uint32_t) && - key->iov_len != sizeof(uint64_t))) { - mdbx_cassert(mc, !"key-size is invalid for MDBX_INTEGERKEY"); - return MDBX_BAD_VALSIZE; - } - - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - - /* See if we're already on the right page */ - if (mc->mc_flags & C_INITIALIZED) { - MDBX_val nodekey; - - mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - mp = mc->mc_pg[mc->mc_top]; - if (!page_numkeys(mp)) { - mc->mc_ki[mc->mc_top] = 0; - return MDBX_NOTFOUND; - } - if (IS_LEAF2(mp)) { - nodekey.iov_len = mc->mc_db->md_xsize; - nodekey.iov_base = page_leaf2key(mp, 0, nodekey.iov_len); - } else { - node = page_node(mp, 0); - get_key(node, &nodekey); - } - rc = mc->mc_dbx->md_cmp(key, &nodekey); - if (unlikely(rc == 0)) { - /* Probably happens rarely, but first node on the page - * was the one we wanted. */ - mc->mc_ki[mc->mc_top] = 0; - *exactp = 1; - goto set1; - } - if (rc > 0) { - const unsigned nkeys = page_numkeys(mp); - unsigned i; - if (nkeys > 1) { - if (IS_LEAF2(mp)) { - nodekey.iov_base = page_leaf2key(mp, nkeys - 1, nodekey.iov_len); - } else { - node = page_node(mp, nkeys - 1); - get_key(node, &nodekey); - } - rc = mc->mc_dbx->md_cmp(key, &nodekey); - if (rc == 0) { - /* last node was the one we wanted */ - mdbx_cassert(mc, nkeys >= 1 && nkeys <= UINT16_MAX + 1); - mc->mc_ki[mc->mc_top] = (indx_t)(nkeys - 1); - *exactp = 1; - goto set1; - } - if (rc < 0) { - if (mc->mc_ki[mc->mc_top] < page_numkeys(mp)) { - /* This is definitely the right page, skip search_page */ - if (IS_LEAF2(mp)) { - nodekey.iov_base = - page_leaf2key(mp, mc->mc_ki[mc->mc_top], nodekey.iov_len); - } else { - node = page_node(mp, mc->mc_ki[mc->mc_top]); - get_key(node, &nodekey); - } - rc = mc->mc_dbx->md_cmp(key, &nodekey); - if (rc == 0) { - /* current node was the one we wanted */ - *exactp = 1; - goto set1; - } - } - rc = 0; - mc->mc_flags &= ~C_EOF; - goto set2; - } - } - /* If any parents have right-sibs, search. - * Otherwise, there's nothing further. */ - for (i = 0; i < mc->mc_top; i++) - if (mc->mc_ki[i] < page_numkeys(mc->mc_pg[i]) - 1) - break; - if (i == mc->mc_top) { - /* There are no other pages */ - mdbx_cassert(mc, nkeys <= UINT16_MAX); - mc->mc_ki[mc->mc_top] = (uint16_t)nkeys; - return MDBX_NOTFOUND; - } - } - if (!mc->mc_top) { - /* There are no other pages */ - mc->mc_ki[mc->mc_top] = 0; - if (op == MDBX_SET_RANGE && exactp == &stub_exactp) { - rc = 0; - goto set1; - } else - return MDBX_NOTFOUND; - } - } else { - mc->mc_pg[0] = 0; - } - - rc = mdbx_page_search(mc, key, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - mp = mc->mc_pg[mc->mc_top]; - mdbx_cassert(mc, IS_LEAF(mp)); - -set2: - node = mdbx_node_search(mc, key, exactp); - if (exactp != &stub_exactp && !*exactp) { - /* MDBX_SET specified and not an exact match. */ - return MDBX_NOTFOUND; - } - - if (node == NULL) { - mdbx_debug("%s", "===> inexact leaf not found, goto sibling"); - if (unlikely((rc = mdbx_cursor_sibling(mc, 1)) != MDBX_SUCCESS)) { - mc->mc_flags |= C_EOF; - return rc; /* no entries matched */ - } - mp = mc->mc_pg[mc->mc_top]; - mdbx_cassert(mc, IS_LEAF(mp)); - node = page_node(mp, 0); - } - -set1: - mc->mc_flags |= C_INITIALIZED; - mc->mc_flags &= ~C_EOF; - - if (IS_LEAF2(mp)) { - if (op == MDBX_SET_RANGE || op == MDBX_SET_KEY) { - key->iov_len = mc->mc_db->md_xsize; - key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); - } - return MDBX_SUCCESS; - } - - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - if (likely(data)) { - if (F_ISSET(node_flags(node), F_DUPDATA)) { - if (op == MDBX_SET || op == MDBX_SET_KEY || op == MDBX_SET_RANGE) { - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - } else { - int ex2, *ex2p; - if (op == MDBX_GET_BOTH) { - ex2p = &ex2; - ex2 = 0; - } else { - ex2p = NULL; - } - rc = mdbx_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, - MDBX_SET_RANGE, ex2p); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - } else if (op == MDBX_GET_BOTH || op == MDBX_GET_BOTH_RANGE) { - MDBX_val olddata; - if (unlikely((rc = mdbx_node_read(mc, node, &olddata)) != MDBX_SUCCESS)) - return rc; - if (unlikely(mc->mc_dbx->md_dcmp == NULL)) - return MDBX_EINVAL; - rc = mc->mc_dbx->md_dcmp(data, &olddata); - if (rc) { - if (op != MDBX_GET_BOTH_RANGE || rc > 0) - return MDBX_NOTFOUND; - rc = 0; - } - *data = olddata; - } else { - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) - return rc; - } - } - - /* The key already matches in all other cases */ - if (op == MDBX_SET_RANGE || op == MDBX_SET_KEY) - get_key_optional(node, key); - - mdbx_debug("==> cursor placed on key [%s], data [%s]", DKEY(key), DVAL(data)); - return rc; -} - -/* Move the cursor to the first item in the database. */ -static int mdbx_cursor_first(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data) { - int rc; - - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - - if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { - rc = mdbx_page_search(mc, NULL, MDBX_PS_FIRST); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - - mc->mc_flags |= C_INITIALIZED; - mc->mc_flags &= ~C_EOF; - mc->mc_ki[mc->mc_top] = 0; - - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - key->iov_len = mc->mc_db->md_xsize; - key->iov_base = page_leaf2key(mc->mc_pg[mc->mc_top], 0, key->iov_len); - return MDBX_SUCCESS; - } - - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], 0); - if (likely(data)) { - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc)) - return rc; - } else { - if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) - return rc; - } - } - get_key_optional(node, key); - return MDBX_SUCCESS; -} - -/* Move the cursor to the last item in the database. */ -static int mdbx_cursor_last(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data) { - int rc; - - if (mc->mc_xcursor) - mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - - if (likely((mc->mc_flags & (C_EOF | C_DEL)) != C_EOF)) { - if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { - rc = mdbx_page_search(mc, NULL, MDBX_PS_LAST); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - } - - mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mc->mc_pg[mc->mc_top]) - 1; - mc->mc_flags |= C_INITIALIZED | C_EOF; - - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - key->iov_len = mc->mc_db->md_xsize; - key->iov_base = page_leaf2key(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], - key->iov_len); - return MDBX_SUCCESS; - } - - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (likely(data)) { - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc)) - return rc; - } else { - if (unlikely((rc = mdbx_node_read(mc, node, data)) != MDBX_SUCCESS)) - return rc; - } - } - - get_key_optional(node, key); - return MDBX_SUCCESS; -} - -int mdbx_cursor_get(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, - MDBX_cursor_op op) { - if (unlikely(mc == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = check_txn(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - int exact = 0; - int (*mfunc)(MDBX_cursor * mc, MDBX_val * key, MDBX_val * data); - switch (op) { - case MDBX_GET_CURRENT: { - if (unlikely(!(mc->mc_flags & C_INITIALIZED))) - return MDBX_EINVAL; - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - const unsigned nkeys = page_numkeys(mp); - if (mc->mc_ki[mc->mc_top] >= nkeys) { - mdbx_cassert(mc, nkeys <= UINT16_MAX); - mc->mc_ki[mc->mc_top] = (uint16_t)nkeys; - return MDBX_NOTFOUND; - } - mdbx_cassert(mc, nkeys > 0); - - rc = MDBX_SUCCESS; - if (IS_LEAF2(mp)) { - key->iov_len = mc->mc_db->md_xsize; - key->iov_base = page_leaf2key(mp, mc->mc_ki[mc->mc_top], key->iov_len); - } else { - MDBX_node *node = page_node(mp, mc->mc_ki[mc->mc_top]); - get_key_optional(node, key); - if (data) { - if (F_ISSET(node_flags(node), F_DUPDATA)) { - if (unlikely(!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc)) - return rc; - } - rc = mdbx_cursor_get(&mc->mc_xcursor->mx_cursor, data, NULL, - MDBX_GET_CURRENT); - } else { - rc = mdbx_node_read(mc, node, data); - } - if (unlikely(rc)) - return rc; - } - } - break; - } - case MDBX_GET_BOTH: - case MDBX_GET_BOTH_RANGE: - if (unlikely(data == NULL)) - return MDBX_EINVAL; - if (unlikely(mc->mc_xcursor == NULL)) - return MDBX_INCOMPATIBLE; - /* fall through */ - __fallthrough; - case MDBX_SET: - case MDBX_SET_KEY: - case MDBX_SET_RANGE: - if (unlikely(key == NULL)) - return MDBX_EINVAL; - rc = mdbx_cursor_set(mc, key, data, op, - op == MDBX_SET_RANGE ? NULL : &exact); - break; - case MDBX_GET_MULTIPLE: - if (unlikely(data == NULL || !(mc->mc_flags & C_INITIALIZED))) - return MDBX_EINVAL; - if (unlikely(!(mc->mc_db->md_flags & MDBX_DUPFIXED))) - return MDBX_INCOMPATIBLE; - rc = MDBX_SUCCESS; - if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) || - (mc->mc_xcursor->mx_cursor.mc_flags & C_EOF)) - break; - goto fetchm; - case MDBX_NEXT_MULTIPLE: - if (unlikely(data == NULL)) - return MDBX_EINVAL; - if (unlikely(!(mc->mc_db->md_flags & MDBX_DUPFIXED))) - return MDBX_INCOMPATIBLE; - rc = mdbx_cursor_next(mc, key, data, MDBX_NEXT_DUP); - if (rc == MDBX_SUCCESS) { - if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { - MDBX_cursor *mx; - fetchm: - mx = &mc->mc_xcursor->mx_cursor; - data->iov_len = - page_numkeys(mx->mc_pg[mx->mc_top]) * mx->mc_db->md_xsize; - data->iov_base = page_data(mx->mc_pg[mx->mc_top]); - mx->mc_ki[mx->mc_top] = (indx_t)page_numkeys(mx->mc_pg[mx->mc_top]) - 1; - } else { - rc = MDBX_NOTFOUND; - } - } - break; - case MDBX_PREV_MULTIPLE: - if (data == NULL) - return MDBX_EINVAL; - if (!(mc->mc_db->md_flags & MDBX_DUPFIXED)) - return MDBX_INCOMPATIBLE; - rc = MDBX_SUCCESS; - if (!(mc->mc_flags & C_INITIALIZED)) - rc = mdbx_cursor_last(mc, key, data); - if (rc == MDBX_SUCCESS) { - MDBX_cursor *mx = &mc->mc_xcursor->mx_cursor; - if (mx->mc_flags & C_INITIALIZED) { - rc = mdbx_cursor_sibling(mx, 0); - if (rc == MDBX_SUCCESS) - goto fetchm; - } else { - rc = MDBX_NOTFOUND; - } - } - break; - case MDBX_NEXT: - case MDBX_NEXT_DUP: - case MDBX_NEXT_NODUP: - rc = mdbx_cursor_next(mc, key, data, op); - break; - case MDBX_PREV: - case MDBX_PREV_DUP: - case MDBX_PREV_NODUP: - rc = mdbx_cursor_prev(mc, key, data, op); - break; - case MDBX_FIRST: - rc = mdbx_cursor_first(mc, key, data); - break; - case MDBX_FIRST_DUP: - mfunc = mdbx_cursor_first; - mmove: - if (unlikely(data == NULL || !(mc->mc_flags & C_INITIALIZED))) - return MDBX_EINVAL; - if (unlikely(mc->mc_xcursor == NULL)) - return MDBX_INCOMPATIBLE; - if (mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top])) { - mc->mc_ki[mc->mc_top] = (indx_t)page_numkeys(mc->mc_pg[mc->mc_top]); - return MDBX_NOTFOUND; - } - { - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (!F_ISSET(node_flags(node), F_DUPDATA)) { - get_key_optional(node, key); - rc = mdbx_node_read(mc, node, data); - break; - } - } - if (unlikely(!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))) - return MDBX_EINVAL; - rc = mfunc(&mc->mc_xcursor->mx_cursor, data, NULL); - break; - case MDBX_LAST: - rc = mdbx_cursor_last(mc, key, data); - break; - case MDBX_LAST_DUP: - mfunc = mdbx_cursor_last; - goto mmove; - default: - mdbx_debug("unhandled/unimplemented cursor operation %u", op); - return MDBX_EINVAL; - } - - mc->mc_flags &= ~C_DEL; - return rc; -} - -/* Touch all the pages in the cursor stack. Set mc_top. - * Makes sure all the pages are writable, before attempting a write operation. - * [in] mc The cursor to operate on. */ -static int mdbx_cursor_touch(MDBX_cursor *mc) { - int rc = MDBX_SUCCESS; - - if (mc->mc_dbi >= CORE_DBS && - (*mc->mc_dbflag & (DB_DIRTY | DB_DUPDATA)) == 0) { - mdbx_cassert(mc, (mc->mc_flags & C_RECLAIMING) == 0); - /* Touch DB record of named DB */ - MDBX_cursor_couple cx; - if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi)) - return MDBX_BAD_DBI; - rc = mdbx_cursor_init(&cx.outer, mc->mc_txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_page_search(&cx.outer, &mc->mc_dbx->md_name, MDBX_PS_MODIFY); - if (unlikely(rc)) - return rc; - *mc->mc_dbflag |= DB_DIRTY; - } - mc->mc_top = 0; - if (mc->mc_snum) { - do { - rc = mdbx_page_touch(mc); - } while (!rc && ++(mc->mc_top) < mc->mc_snum); - mc->mc_top = mc->mc_snum - 1; - } - return rc; -} - -int mdbx_cursor_put(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, - unsigned flags) { - MDBX_env *env; - MDBX_page *sub_root = NULL; - MDBX_val xdata, *rdata, dkey, olddata; - MDBX_db nested_dupdb; - unsigned mcount = 0, dcount = 0, nospill; - size_t nsize; - int rc2; - unsigned nflags; - DKBUF; - - if (unlikely(mc == NULL || key == NULL || data == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = check_txn_rw(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - env = mc->mc_txn->mt_env; - - /* Check this first so counter will always be zero on any early failures. */ - if (flags & MDBX_MULTIPLE) { - if (unlikely(!F_ISSET(mc->mc_db->md_flags, MDBX_DUPFIXED))) - return MDBX_INCOMPATIBLE; - if (unlikely(data[1].iov_len >= INT_MAX)) - return MDBX_EINVAL; - dcount = (unsigned)data[1].iov_len; - data[1].iov_len = 0; - } - - if (flags & MDBX_RESERVE) { - if (unlikely(mc->mc_db->md_flags & (MDBX_DUPSORT | MDBX_REVERSEDUP))) - return MDBX_INCOMPATIBLE; - data->iov_base = nullptr; - } - - nospill = flags & MDBX_NOSPILL; - flags &= ~MDBX_NOSPILL; - - if (unlikely(mc->mc_txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) - return (mc->mc_txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; - - if ((mc->mc_flags & C_SUB) == 0) { - if (unlikely(key->iov_len > (size_t)((mc->mc_db->md_flags & MDBX_DUPSORT) - ? env->me_maxkey_ds - : env->me_maxkey_nd) || - data->iov_len > ((mc->mc_db->md_flags & MDBX_DUPSORT) - ? env->me_maxval_ds - : env->me_maxval_nd))) { - return MDBX_BAD_VALSIZE; - } - - if ((mc->mc_db->md_flags & MDBX_INTEGERKEY)) { - if (unlikely(key->iov_len != sizeof(uint32_t) && - key->iov_len != sizeof(uint64_t))) { - mdbx_cassert(mc, !"key-size is invalid for MDBX_INTEGERKEY"); - return MDBX_BAD_VALSIZE; - } - if (unlikely(3 & (uintptr_t)key->iov_base)) { - mdbx_cassert(mc, !"key-alignment is invalid for MDBX_INTEGERKEY"); - return MDBX_BAD_VALSIZE; - } - } - - if ((mc->mc_db->md_flags & MDBX_INTEGERDUP)) { - if (unlikely(data->iov_len != sizeof(uint32_t) && - data->iov_len != sizeof(uint64_t))) { - mdbx_cassert(mc, !"data-size is invalid for MDBX_INTEGERDUP"); - return MDBX_BAD_VALSIZE; - } - if (unlikely(3 & (uintptr_t)data->iov_base)) { - mdbx_cassert(mc, !"data-alignment is invalid for MDBX_INTEGERDUP"); - return MDBX_BAD_VALSIZE; - } - } - } - - mdbx_debug("==> put db %d key [%s], size %" PRIuPTR - ", data [%s] size %" PRIuPTR, - DDBI(mc), DKEY(key), key->iov_len, - DVAL((flags & MDBX_RESERVE) ? nullptr : data), data->iov_len); - - int dupdata_flag = 0; - if ((flags & MDBX_CURRENT) != 0 && (mc->mc_flags & C_SUB) == 0) { - /* Опция MDBX_CURRENT означает, что запрошено обновление текущей записи, - * на которой сейчас стоит курсор. Проверяем что переданный ключ совпадает - * со значением в текущей позиции курсора. - * Здесь проще вызвать mdbx_cursor_get(), так как для обслуживания таблиц - * с MDBX_DUPSORT также требуется текущий размер данных. */ - MDBX_val current_key, current_data; - rc = mdbx_cursor_get(mc, ¤t_key, ¤t_data, MDBX_GET_CURRENT); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if (mc->mc_dbx->md_cmp(key, ¤t_key) != 0) - return MDBX_EKEYMISMATCH; - - if (F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)) { - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - mdbx_cassert(mc, - mc->mc_xcursor != NULL && - (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)); - /* Если за ключом более одного значения, либо если размер данных - * отличается, то вместо inplace обновления требуется удаление и - * последующая вставка. */ - if (mc->mc_xcursor->mx_db.md_entries > 1 || - current_data.iov_len != data->iov_len) { - rc = mdbx_cursor_del(mc, 0); - if (rc != MDBX_SUCCESS) - return rc; - flags -= MDBX_CURRENT; - } - } else if (unlikely(node_size(key, data) > - /* See note inside leaf_size() */ - env->me_branch_nodemax)) { - rc = mdbx_cursor_del(mc, 0); - if (rc != MDBX_SUCCESS) - return rc; - flags -= MDBX_CURRENT; - } - } - } - - if (mc->mc_db->md_root == P_INVALID) { - /* new database, cursor has nothing to point to */ - mc->mc_snum = 0; - mc->mc_top = 0; - mc->mc_flags &= ~C_INITIALIZED; - rc = MDBX_NO_ROOT; - } else if ((flags & MDBX_CURRENT) == 0) { - int exact = 0; - MDBX_val d2; - if ((flags & MDBX_APPEND) != 0 && mc->mc_db->md_entries > 0) { - MDBX_val k2; - rc = mdbx_cursor_last(mc, &k2, &d2); - if (rc == 0) { - rc = mc->mc_dbx->md_cmp(key, &k2); - if (rc > 0) { - rc = MDBX_NOTFOUND; - mc->mc_ki[mc->mc_top]++; - } else if (unlikely(rc < 0 || (flags & MDBX_APPENDDUP) == 0)) { - /* new key is <= last key */ - rc = MDBX_EKEYMISMATCH; - } - } - } else { - rc = mdbx_cursor_set(mc, key, &d2, MDBX_SET, &exact); - } - if ((flags & MDBX_NOOVERWRITE) && - (rc == MDBX_SUCCESS || rc == MDBX_EKEYMISMATCH)) { - mdbx_debug("duplicate key [%s]", DKEY(key)); - *data = d2; - return MDBX_KEYEXIST; - } - if (rc && unlikely(rc != MDBX_NOTFOUND)) - return rc; - } - - mc->mc_flags &= ~C_DEL; - - /* Cursor is positioned, check for room in the dirty list */ - if (!nospill) { - if (flags & MDBX_MULTIPLE) { - rdata = &xdata; - xdata.iov_len = data->iov_len * dcount; - } else { - rdata = data; - } - if (unlikely(rc2 = mdbx_page_spill(mc, key, rdata))) - return rc2; - } - - if (rc == MDBX_NO_ROOT) { - MDBX_page *np; - /* new database, write a root leaf page */ - mdbx_debug("%s", "allocating new root leaf page"); - if (unlikely(rc2 = mdbx_page_new(mc, P_LEAF, 1, &np))) { - return rc2; - } - rc2 = mdbx_cursor_push(mc, np); - if (unlikely(rc2 != MDBX_SUCCESS)) - return rc2; - mc->mc_db->md_root = np->mp_pgno; - mc->mc_db->md_depth++; - *mc->mc_dbflag |= DB_DIRTY; - if ((mc->mc_db->md_flags & (MDBX_DUPSORT | MDBX_DUPFIXED)) == MDBX_DUPFIXED) - np->mp_flags |= P_LEAF2; - mc->mc_flags |= C_INITIALIZED; - } else { - /* make sure all cursor pages are writable */ - rc2 = mdbx_cursor_touch(mc); - if (unlikely(rc2)) - return rc2; - } - - bool insert_key, insert_data, do_sub = false; - insert_key = insert_data = (rc != MDBX_SUCCESS); - uint16_t fp_flags = P_LEAF | P_DIRTY; - MDBX_page *fp = env->me_pbuf; - fp->mp_txnid = INVALID_TXNID; - if (insert_key) { - /* The key does not exist */ - mdbx_debug("inserting key at index %i", mc->mc_ki[mc->mc_top]); - if ((mc->mc_db->md_flags & MDBX_DUPSORT) && - node_size(key, data) > - /* See note inside leaf_size() */ env->me_branch_nodemax) { - /* Too big for a node, insert in sub-DB. Set up an empty - * "old sub-page" for prep_subDB to expand to a full page. */ - fp->mp_leaf2_ksize = (uint16_t)data->iov_len /* used if MDBX_DUPFIXED */; - fp->mp_lower = fp->mp_upper = 0; - olddata.iov_len = PAGEHDRSZ; - goto prep_subDB; - } - } else { - /* there's only a key anyway, so this is a no-op */ - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - char *ptr; - unsigned ksize = mc->mc_db->md_xsize; - if (unlikely(key->iov_len != ksize)) - return MDBX_BAD_VALSIZE; - ptr = page_leaf2key(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], ksize); - memcpy(ptr, key->iov_base, ksize); - fix_parent: - /* if overwriting slot 0 of leaf, need to - * update branch key if there is a parent page */ - if (mc->mc_top && !mc->mc_ki[mc->mc_top]) { - unsigned dtop = 1; - mc->mc_top--; - /* slot 0 is always an empty key, find real slot */ - while (mc->mc_top && !mc->mc_ki[mc->mc_top]) { - mc->mc_top--; - dtop++; - } - if (mc->mc_ki[mc->mc_top]) - rc2 = mdbx_update_key(mc, key); - else - rc2 = MDBX_SUCCESS; - mdbx_cassert(mc, mc->mc_top + dtop < UINT16_MAX); - mc->mc_top += (uint16_t)dtop; - if (rc2) - return rc2; - } - - if (mdbx_audit_enabled()) { - int err = mdbx_cursor_check(mc, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - return MDBX_SUCCESS; - } - - more:; - if (mdbx_audit_enabled()) { - int err = mdbx_cursor_check(mc, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - - /* overflow page overwrites need special handling */ - if (unlikely(F_ISSET(node_flags(node), F_BIGDATA))) { - int level, ovpages, - dpages = (node_size(key, data) > - /* See note inside leaf_size() */ env->me_branch_nodemax) - ? number_of_ovpages(env, data->iov_len) - : 0; - - const pgno_t pg = node_largedata_pgno(node); - MDBX_page *omp; - if (unlikely((rc2 = mdbx_page_get(mc, pg, &omp, &level)) != 0)) - return rc2; - ovpages = omp->mp_pages; - - /* Is the ov page large enough? */ - if (unlikely(mc->mc_flags & C_GCFREEZE) - ? ovpages >= dpages - : ovpages == - /* LY: add configurable threshold to keep reserve space */ - dpages) { - if (!IS_DIRTY(omp) && (level || (env->me_flags & MDBX_WRITEMAP))) { - rc2 = mdbx_page_unspill(mc->mc_txn, omp, &omp); - if (unlikely(rc2)) - return rc2; - level = 0; /* dirty in this txn or clean */ - } - /* Is it dirty? */ - if (IS_DIRTY(omp)) { - mdbx_cassert(mc, omp->mp_txnid > SAFE64_INVALID_THRESHOLD); - /* yes, overwrite it. Note in this case we don't - * bother to try shrinking the page if the new data - * is smaller than the overflow threshold. */ - if (unlikely(level > 1)) { - /* It is writable only in a parent txn */ - MDBX_page *np = mdbx_page_malloc(mc->mc_txn, ovpages); - if (unlikely(!np)) - return MDBX_ENOMEM; - /* Note - this page is already counted in parent's dirtyroom */ - rc2 = mdbx_dpl_append(mc->mc_txn->tw.dirtylist, pg, np); - if (unlikely(rc2 != MDBX_SUCCESS)) { - rc = rc2; - mdbx_dpage_free(env, np, ovpages); - goto fail; - } - - /* Currently we make the page look as with put() in the - * parent txn, in case the user peeks at MDBX_RESERVEd - * or unused parts. Some users treat ovpages specially. */ - const size_t whole = pgno2bytes(env, ovpages); - /* Skip the part where MDBX will put *data. - * Copy end of page, adjusting alignment so - * compiler may copy words instead of bytes. */ - const size_t off = - (PAGEHDRSZ + data->iov_len) & -(intptr_t)sizeof(size_t); - memcpy((size_t *)((char *)np + off), (size_t *)((char *)omp + off), - whole - off); - memcpy(np, omp, PAGEHDRSZ); /* Copy header of page */ - omp = np; - } - node_set_ds(node, data->iov_len); - if (F_ISSET(flags, MDBX_RESERVE)) - data->iov_base = page_data(omp); - else - memcpy(page_data(omp), data->iov_base, data->iov_len); - - if (mdbx_audit_enabled()) { - int err = mdbx_cursor_check(mc, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - return MDBX_SUCCESS; - } - } - if ((rc2 = mdbx_page_retire(mc, omp)) != MDBX_SUCCESS) - return rc2; - } else { - olddata.iov_len = node_ds(node); - olddata.iov_base = node_data(node); - mdbx_cassert(mc, (char *)olddata.iov_base + olddata.iov_len <= - (char *)(mc->mc_pg[mc->mc_top]) + env->me_psize); - - /* DB has dups? */ - if (F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)) { - /* Prepare (sub-)page/sub-DB to accept the new item, if needed. - * fp: old sub-page or a header faking it. - * mp: new (sub-)page. offset: growth in page size. - * xdata: node data with new page or DB. */ - unsigned i; - size_t offset = 0; - MDBX_page *mp = fp = xdata.iov_base = env->me_pbuf; - mp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno; - - /* Was a single item before, must convert now */ - if (!F_ISSET(node_flags(node), F_DUPDATA)) { - - /* Just overwrite the current item */ - if (flags & MDBX_CURRENT) { - mdbx_cassert( - mc, - node_size(key, data) <= - /* See note inside leaf_size() */ env->me_branch_nodemax); - goto current; - } - - /* does data match? */ - if (!mc->mc_dbx->md_dcmp(data, &olddata)) { - if (unlikely(flags & (MDBX_NODUPDATA | MDBX_APPENDDUP))) - return MDBX_KEYEXIST; - /* overwrite it */ - mdbx_cassert( - mc, - node_size(key, data) <= - /* See note inside leaf_size() */ env->me_branch_nodemax); - goto current; - } - - /* Back up original data item */ - memcpy(dkey.iov_base = fp + 1, olddata.iov_base, - dkey.iov_len = olddata.iov_len); - dupdata_flag = 1; - - /* Make sub-page header for the dup items, with dummy body */ - fp->mp_flags = P_LEAF | P_DIRTY | P_SUBP; - fp->mp_lower = 0; - xdata.iov_len = PAGEHDRSZ + dkey.iov_len + data->iov_len; - if (mc->mc_db->md_flags & MDBX_DUPFIXED) { - fp->mp_flags |= P_LEAF2; - fp->mp_leaf2_ksize = (uint16_t)data->iov_len; - xdata.iov_len += 2 * data->iov_len; /* leave space for 2 more */ - mdbx_cassert(mc, xdata.iov_len <= env->me_psize); - } else { - xdata.iov_len += 2 * (sizeof(indx_t) + NODESIZE) + - (dkey.iov_len & 1) + (data->iov_len & 1); - mdbx_cassert(mc, xdata.iov_len <= env->me_psize); - } - fp->mp_upper = (uint16_t)(xdata.iov_len - PAGEHDRSZ); - olddata.iov_len = xdata.iov_len; /* pretend olddata is fp */ - } else if (node_flags(node) & F_SUBDATA) { - /* Data is on sub-DB, just store it */ - flags |= F_DUPDATA | F_SUBDATA; - goto put_sub; - } else { - /* Data is on sub-page */ - fp = olddata.iov_base; - switch (flags) { - default: - if (!(mc->mc_db->md_flags & MDBX_DUPFIXED)) { - offset = node_size(data, nullptr) + sizeof(indx_t); - break; - } - offset = fp->mp_leaf2_ksize; - if (page_room(fp) < offset) { - offset *= 4; /* space for 4 more */ - break; - } - /* FALLTHRU: Big enough MDBX_DUPFIXED sub-page */ - __fallthrough; - case MDBX_CURRENT | MDBX_NODUPDATA: - case MDBX_CURRENT: - fp->mp_flags |= P_DIRTY; - fp->mp_txnid = INVALID_TXNID; - fp->mp_pgno = mp->mp_pgno; - mc->mc_xcursor->mx_cursor.mc_pg[0] = fp; - flags |= F_DUPDATA; - goto put_sub; - } - xdata.iov_len = olddata.iov_len + offset; - } - - fp_flags = fp->mp_flags; - if (NODESIZE + node_ks(node) + xdata.iov_len > - /* See note inside leaf_size() */ env->me_branch_nodemax) { - /* Too big for a sub-page, convert to sub-DB */ - fp_flags &= ~P_SUBP; - prep_subDB: - nested_dupdb.md_xsize = 0; - nested_dupdb.md_flags = 0; - if (mc->mc_db->md_flags & MDBX_DUPFIXED) { - fp_flags |= P_LEAF2; - nested_dupdb.md_xsize = fp->mp_leaf2_ksize; - if (mc->mc_db->md_flags & MDBX_INTEGERDUP) - nested_dupdb.md_flags = MDBX_INTEGERKEY; - } - nested_dupdb.md_depth = 1; - nested_dupdb.md_branch_pages = 0; - nested_dupdb.md_leaf_pages = 1; - nested_dupdb.md_overflow_pages = 0; - nested_dupdb.md_entries = page_numkeys(fp); - xdata.iov_len = sizeof(nested_dupdb); - xdata.iov_base = &nested_dupdb; - if ((rc2 = mdbx_page_alloc(mc, 1, &mp, MDBX_ALLOC_ALL))) - return rc2; - mc->mc_db->md_leaf_pages += 1; - mdbx_cassert(mc, env->me_psize > olddata.iov_len); - offset = env->me_psize - (unsigned)olddata.iov_len; - flags |= F_DUPDATA | F_SUBDATA; - nested_dupdb.md_root = mp->mp_pgno; - nested_dupdb.md_seq = nested_dupdb.md_mod_txnid = 0; - sub_root = mp; - } - if (mp != fp) { - mp->mp_flags = fp_flags | P_DIRTY; - mp->mp_txnid = INVALID_TXNID; - mp->mp_leaf2_ksize = fp->mp_leaf2_ksize; - mp->mp_lower = fp->mp_lower; - mdbx_cassert(mc, fp->mp_upper + offset <= UINT16_MAX); - mp->mp_upper = (indx_t)(fp->mp_upper + offset); - if (unlikely(fp_flags & P_LEAF2)) { - memcpy(page_data(mp), page_data(fp), - page_numkeys(fp) * fp->mp_leaf2_ksize); - } else { - memcpy((char *)mp + mp->mp_upper + PAGEHDRSZ, - (char *)fp + fp->mp_upper + PAGEHDRSZ, - olddata.iov_len - fp->mp_upper - PAGEHDRSZ); - memcpy((char *)(&mp->mp_ptrs), (char *)(&fp->mp_ptrs), - page_numkeys(fp) * sizeof(mp->mp_ptrs[0])); - for (i = 0; i < page_numkeys(fp); i++) { - mdbx_cassert(mc, mp->mp_ptrs[i] + offset <= UINT16_MAX); - mp->mp_ptrs[i] += (indx_t)offset; - } - } - } - - rdata = &xdata; - flags |= F_DUPDATA; - do_sub = true; - if (!insert_key) - mdbx_node_del(mc, 0); - goto new_sub; - } - - /* MDBX passes F_SUBDATA in 'flags' to write a DB record */ - if (unlikely((node_flags(node) ^ flags) & F_SUBDATA)) - return MDBX_INCOMPATIBLE; - - current: - if (data->iov_len == olddata.iov_len) { - mdbx_cassert(mc, EVEN(key->iov_len) == EVEN(node_ks(node))); - /* same size, just replace it. Note that we could - * also reuse this node if the new data is smaller, - * but instead we opt to shrink the node in that case. */ - if (F_ISSET(flags, MDBX_RESERVE)) - data->iov_base = olddata.iov_base; - else if (!(mc->mc_flags & C_SUB)) - memcpy(olddata.iov_base, data->iov_base, data->iov_len); - else { - mdbx_cassert(mc, page_numkeys(mc->mc_pg[mc->mc_top]) == 1); - mdbx_cassert(mc, PAGETYPE(mc->mc_pg[mc->mc_top]) == P_LEAF); - mdbx_cassert(mc, node_ds(node) == 0); - mdbx_cassert(mc, node_flags(node) == 0); - mdbx_cassert(mc, key->iov_len < UINT16_MAX); - node_set_ks(node, key->iov_len); - memcpy(node_key(node), key->iov_base, key->iov_len); - mdbx_cassert(mc, (char *)node_key(node) + node_ds(node) < - (char *)(mc->mc_pg[mc->mc_top]) + env->me_psize); - goto fix_parent; - } - - if (mdbx_audit_enabled()) { - int err = mdbx_cursor_check(mc, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - return MDBX_SUCCESS; - } - } - mdbx_node_del(mc, 0); - } - - rdata = data; - -new_sub: - nflags = flags & NODE_ADD_FLAGS; - nsize = IS_LEAF2(mc->mc_pg[mc->mc_top]) ? key->iov_len - : leaf_size(env, key, rdata); - if (page_room(mc->mc_pg[mc->mc_top]) < nsize) { - if ((flags & (F_DUPDATA | F_SUBDATA)) == F_DUPDATA) - nflags &= ~MDBX_APPEND; /* sub-page may need room to grow */ - if (!insert_key) - nflags |= MDBX_SPLIT_REPLACE; - rc = mdbx_page_split(mc, key, rdata, P_INVALID, nflags); - if (rc == MDBX_SUCCESS && mdbx_audit_enabled()) - rc = mdbx_cursor_check(mc, false); - } else { - /* There is room already in this leaf page. */ - if (IS_LEAF2(mc->mc_pg[mc->mc_top])) { - mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0 && - rdata->iov_len == 0); - rc = mdbx_node_add_leaf2(mc, mc->mc_ki[mc->mc_top], key); - } else - rc = mdbx_node_add_leaf(mc, mc->mc_ki[mc->mc_top], key, rdata, nflags); - if (likely(rc == 0)) { - /* Adjust other cursors pointing to mp */ - MDBX_cursor *m2, *m3; - MDBX_dbi dbi = mc->mc_dbi; - unsigned i = mc->mc_top; - MDBX_page *mp = mc->mc_pg[i]; - - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == mc || m3->mc_snum < mc->mc_snum || m3->mc_pg[i] != mp) - continue; - if (m3->mc_ki[i] >= mc->mc_ki[i] && insert_key) { - m3->mc_ki[i]++; - } - if (XCURSOR_INITED(m3)) - XCURSOR_REFRESH(m3, mp, m3->mc_ki[i]); - } - } - } - - if (likely(rc == MDBX_SUCCESS)) { - /* Now store the actual data in the child DB. Note that we're - * storing the user data in the keys field, so there are strict - * size limits on dupdata. The actual data fields of the child - * DB are all zero size. */ - if (do_sub) { - int xflags; - size_t ecount; - put_sub: - xdata.iov_len = 0; - xdata.iov_base = nullptr; - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (flags & MDBX_CURRENT) { - xflags = (flags & MDBX_NODUPDATA) - ? MDBX_CURRENT | MDBX_NOOVERWRITE | MDBX_NOSPILL - : MDBX_CURRENT | MDBX_NOSPILL; - } else { - rc2 = mdbx_xcursor_init1(mc, node); - if (unlikely(rc2 != MDBX_SUCCESS)) - return rc2; - xflags = (flags & MDBX_NODUPDATA) ? MDBX_NOOVERWRITE | MDBX_NOSPILL - : MDBX_NOSPILL; - } - if (sub_root) - mc->mc_xcursor->mx_cursor.mc_pg[0] = sub_root; - /* converted, write the original data first */ - if (dupdata_flag) { - rc = mdbx_cursor_put(&mc->mc_xcursor->mx_cursor, &dkey, &xdata, xflags); - if (unlikely(rc)) - goto bad_sub; - /* we've done our job */ - dkey.iov_len = 0; - } - if (!(node_flags(node) & F_SUBDATA) || sub_root) { - /* Adjust other cursors pointing to mp */ - MDBX_cursor *m2; - MDBX_xcursor *mx = mc->mc_xcursor; - unsigned i = mc->mc_top; - MDBX_page *mp = mc->mc_pg[i]; - const int nkeys = page_numkeys(mp); - - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2 = m2->mc_next) { - if (m2 == mc || m2->mc_snum < mc->mc_snum) - continue; - if (!(m2->mc_flags & C_INITIALIZED)) - continue; - if (m2->mc_pg[i] == mp) { - if (m2->mc_ki[i] == mc->mc_ki[i]) { - rc2 = mdbx_xcursor_init2(m2, mx, dupdata_flag); - if (unlikely(rc2 != MDBX_SUCCESS)) - return rc2; - } else if (!insert_key && m2->mc_ki[i] < nkeys) { - XCURSOR_REFRESH(m2, mp, m2->mc_ki[i]); - } - } - } - } - mdbx_cassert(mc, mc->mc_xcursor->mx_db.md_entries < PTRDIFF_MAX); - ecount = (size_t)mc->mc_xcursor->mx_db.md_entries; - if (flags & MDBX_APPENDDUP) - xflags |= MDBX_APPEND; - rc = mdbx_cursor_put(&mc->mc_xcursor->mx_cursor, data, &xdata, xflags); - if (flags & F_SUBDATA) { - void *db = node_data(node); - memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDBX_db)); - } - insert_data = (ecount != (size_t)mc->mc_xcursor->mx_db.md_entries); - } - /* Increment count unless we just replaced an existing item. */ - if (insert_data) - mc->mc_db->md_entries++; - if (insert_key) { - /* Invalidate txn if we created an empty sub-DB */ - if (unlikely(rc)) - goto bad_sub; - /* If we succeeded and the key didn't exist before, - * make sure the cursor is marked valid. */ - mc->mc_flags |= C_INITIALIZED; - } - if (flags & MDBX_MULTIPLE) { - if (!rc) { - mcount++; - /* let caller know how many succeeded, if any */ - data[1].iov_len = mcount; - if (mcount < dcount) { - data[0].iov_base = (char *)data[0].iov_base + data[0].iov_len; - insert_key = insert_data = false; - goto more; - } - } - } - if (rc == MDBX_SUCCESS && mdbx_audit_enabled()) - rc = mdbx_cursor_check(mc, false); - return rc; - bad_sub: - if (unlikely(rc == MDBX_KEYEXIST)) - mdbx_error("unexpected %s", "MDBX_KEYEXIST"); - /* should not happen, we deleted that item */ - rc = MDBX_PROBLEM; - } -fail: - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return rc; -} - -int mdbx_cursor_del(MDBX_cursor *mc, unsigned flags) { - if (unlikely(!mc)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = check_txn_rw(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!(mc->mc_flags & C_INITIALIZED))) - return MDBX_EINVAL; - - if (unlikely(mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top]))) - return MDBX_NOTFOUND; - - if (unlikely(!(flags & MDBX_NOSPILL) && - (rc = mdbx_page_spill(mc, NULL, NULL)))) - return rc; - - rc = mdbx_cursor_touch(mc); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - if (IS_LEAF2(mp)) - goto del_key; - - MDBX_node *node = page_node(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - if (flags & MDBX_NODUPDATA) { - /* mdbx_cursor_del0() will subtract the final entry */ - mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries - 1; - mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; - } else { - if (!F_ISSET(node_flags(node), F_SUBDATA)) { - mc->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); - } - rc = mdbx_cursor_del(&mc->mc_xcursor->mx_cursor, MDBX_NOSPILL); - if (unlikely(rc)) - return rc; - /* If sub-DB still has entries, we're done */ - if (mc->mc_xcursor->mx_db.md_entries) { - if (node_flags(node) & F_SUBDATA) { - /* update subDB info */ - void *db = node_data(node); - memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDBX_db)); - } else { - MDBX_cursor *m2; - /* shrink fake page */ - mdbx_node_shrink(mp, mc->mc_ki[mc->mc_top]); - node = page_node(mp, mc->mc_ki[mc->mc_top]); - mc->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); - /* fix other sub-DB cursors pointed at fake pages on this page */ - for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2 = m2->mc_next) { - if (m2 == mc || m2->mc_snum < mc->mc_snum) - continue; - if (!(m2->mc_flags & C_INITIALIZED)) - continue; - if (m2->mc_pg[mc->mc_top] == mp) { - MDBX_node *inner = node; - if (m2->mc_ki[mc->mc_top] >= page_numkeys(mp)) - continue; - if (m2->mc_ki[mc->mc_top] != mc->mc_ki[mc->mc_top]) { - inner = page_node(mp, m2->mc_ki[mc->mc_top]); - if (node_flags(inner) & F_SUBDATA) - continue; - } - m2->mc_xcursor->mx_cursor.mc_pg[0] = node_data(inner); - } - } - } - mc->mc_db->md_entries--; - mdbx_cassert(mc, mc->mc_db->md_entries > 0 && mc->mc_db->md_depth > 0 && - mc->mc_db->md_root != P_INVALID); - return rc; - } else { - mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED; - } - /* otherwise fall thru and delete the sub-DB */ - } - - if (node_flags(node) & F_SUBDATA) { - /* add all the child DB's pages to the free list */ - rc = mdbx_drop0(&mc->mc_xcursor->mx_cursor, 0); - if (unlikely(rc)) - goto fail; - } - } - /* MDBX passes F_SUBDATA in 'flags' to delete a DB record */ - else if (unlikely((node_flags(node) ^ flags) & F_SUBDATA)) { - rc = MDBX_INCOMPATIBLE; - goto fail; - } - - /* add overflow pages to free list */ - if (F_ISSET(node_flags(node), F_BIGDATA)) { - MDBX_page *omp; - if (unlikely( - (rc = mdbx_page_get(mc, node_largedata_pgno(node), &omp, NULL)) || - (rc = mdbx_page_retire(mc, omp)))) - goto fail; - } - -del_key: - return mdbx_cursor_del0(mc); - -fail: - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return rc; -} - -/* Allocate and initialize new pages for a database. - * Set MDBX_TXN_ERROR on failure. - * - * [in] mc a cursor on the database being added to. - * [in] flags flags defining what type of page is being allocated. - * [in] num the number of pages to allocate. This is usually 1, - * unless allocating overflow pages for a large record. - * [out] mp Address of a page, or NULL on failure. - * - * Returns 0 on success, non-zero on failure. */ -static int mdbx_page_new(MDBX_cursor *mc, unsigned flags, unsigned num, - MDBX_page **mp) { - MDBX_page *np; - int rc; - - if (unlikely((rc = mdbx_page_alloc(mc, num, &np, MDBX_ALLOC_ALL)))) - return rc; - *mp = np; - mdbx_debug("allocated new page #%" PRIaPGNO ", size %u", np->mp_pgno, - mc->mc_txn->mt_env->me_psize); - np->mp_flags = (uint16_t)(flags | P_DIRTY); - np->mp_txnid = INVALID_TXNID; - np->mp_lower = 0; - np->mp_upper = (indx_t)(mc->mc_txn->mt_env->me_psize - PAGEHDRSZ); - - mc->mc_db->md_branch_pages += IS_BRANCH(np); - mc->mc_db->md_leaf_pages += IS_LEAF(np); - if (unlikely(IS_OVERFLOW(np))) { - mc->mc_db->md_overflow_pages += num; - np->mp_pages = num; - mdbx_cassert(mc, !(mc->mc_flags & C_SUB)); - } else if (unlikely(mc->mc_flags & C_SUB)) { - MDBX_db *outer = mdbx_outer_db(mc); - outer->md_branch_pages += IS_BRANCH(np); - outer->md_leaf_pages += IS_LEAF(np); - } - - return MDBX_SUCCESS; -} - -static int __must_check_result mdbx_node_add_leaf2(MDBX_cursor *mc, - unsigned indx, - const MDBX_val *key) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - DKBUF; - mdbx_debug("add to leaf2-%spage %" PRIaPGNO " index %i, " - " key size %" PRIuPTR " [%s]", - IS_SUBP(mp) ? "sub-" : "", mp->mp_pgno, indx, - key ? key->iov_len : 0, DKEY(key)); - - mdbx_cassert(mc, key); - mdbx_cassert(mc, PAGETYPE(mp) == (P_LEAF | P_LEAF2)); - const unsigned ksize = mc->mc_db->md_xsize; - mdbx_cassert(mc, ksize == key->iov_len); - const unsigned nkeys = page_numkeys(mp); - - /* Just using these for counting */ - const intptr_t lower = mp->mp_lower + sizeof(indx_t); - const intptr_t upper = mp->mp_upper - (ksize - sizeof(indx_t)); - if (unlikely(lower > upper)) { - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PAGE_FULL; - } - mp->mp_lower = (indx_t)lower; - mp->mp_upper = (indx_t)upper; - - char *const ptr = page_leaf2key(mp, indx, ksize); - mdbx_cassert(mc, nkeys >= indx); - const unsigned diff = nkeys - indx; - if (likely(diff > 0)) - /* Move higher keys up one slot. */ - memmove(ptr + ksize, ptr, diff * ksize); - /* insert new key */ - memcpy(ptr, key->iov_base, ksize); - return MDBX_SUCCESS; -} - -static int __must_check_result mdbx_node_add_branch(MDBX_cursor *mc, - unsigned indx, - const MDBX_val *key, - pgno_t pgno) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - DKBUF; - mdbx_debug("add to branch-%spage %" PRIaPGNO " index %i, node-pgno %" PRIaPGNO - " key size %" PRIuPTR " [%s]", - IS_SUBP(mp) ? "sub-" : "", mp->mp_pgno, indx, pgno, - key ? key->iov_len : 0, DKEY(key)); - - mdbx_cassert(mc, PAGETYPE(mp) == P_BRANCH); - STATIC_ASSERT(NODESIZE % 2 == 0); - - /* Move higher pointers up one slot. */ - const unsigned nkeys = page_numkeys(mp); - mdbx_cassert(mc, nkeys >= indx); - for (unsigned i = nkeys; i > indx; --i) - mp->mp_ptrs[i] = mp->mp_ptrs[i - 1]; - - /* Adjust free space offsets. */ - const size_t branch_bytes = branch_size(mc->mc_txn->mt_env, key); - const intptr_t lower = mp->mp_lower + sizeof(indx_t); - const intptr_t upper = mp->mp_upper - (branch_bytes - sizeof(indx_t)); - if (unlikely(lower > upper)) { - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PAGE_FULL; - } - mp->mp_lower = (indx_t)lower; - mp->mp_ptrs[indx] = mp->mp_upper = (indx_t)upper; - - /* Write the node data. */ - MDBX_node *node = page_node(mp, indx); - node_set_pgno(node, pgno); - node_set_flags(node, 0); - UNALIGNED_POKE_8(node, MDBX_node, mn_extra, 0); - node_set_ks(node, 0); - if (likely(key != NULL)) { - node_set_ks(node, key->iov_len); - memcpy(node_key(node), key->iov_base, key->iov_len); - } - return MDBX_SUCCESS; -} - -static int __must_check_result mdbx_node_add_leaf(MDBX_cursor *mc, - unsigned indx, - const MDBX_val *key, - MDBX_val *data, - unsigned flags) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - DKBUF; - mdbx_debug("add to leaf-%spage %" PRIaPGNO " index %i, data size %" PRIuPTR - " key size %" PRIuPTR " [%s]", - IS_SUBP(mp) ? "sub-" : "", mp->mp_pgno, indx, - data ? data->iov_len : 0, key ? key->iov_len : 0, DKEY(key)); - mdbx_cassert(mc, key != NULL && data != NULL); - mdbx_cassert(mc, PAGETYPE(mp) == P_LEAF); - MDBX_page *largepage = NULL; - - size_t leaf_bytes = 0; - if (unlikely(flags & F_BIGDATA)) { - /* Data already on overflow page. */ - STATIC_ASSERT(sizeof(pgno_t) % 2 == 0); - leaf_bytes = node_size(key, nullptr) + sizeof(pgno_t) + sizeof(indx_t); - } else if (unlikely(node_size(key, data) > - /* See note inside leaf_size() */ - mc->mc_txn->mt_env->me_branch_nodemax)) { - /* Put data on overflow page. */ - mdbx_cassert(mc, !F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)); - const pgno_t ovpages = number_of_ovpages(mc->mc_txn->mt_env, data->iov_len); - int rc = mdbx_page_new(mc, P_OVERFLOW, ovpages, &largepage); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - mdbx_debug("allocated %u overflow page(s) %" PRIaPGNO "for %" PRIuPTR - " data bytes", - largepage->mp_pages, largepage->mp_pgno, data->iov_len); - flags |= F_BIGDATA; - leaf_bytes = node_size(key, nullptr) + sizeof(pgno_t) + sizeof(indx_t); - } else { - leaf_bytes = node_size(key, data) + sizeof(indx_t); - } - mdbx_cassert(mc, leaf_bytes == leaf_size(mc->mc_txn->mt_env, key, data)); - - /* Move higher pointers up one slot. */ - const unsigned nkeys = page_numkeys(mp); - mdbx_cassert(mc, nkeys >= indx); - for (unsigned i = nkeys; i > indx; --i) - mp->mp_ptrs[i] = mp->mp_ptrs[i - 1]; - - /* Adjust free space offsets. */ - const intptr_t lower = mp->mp_lower + sizeof(indx_t); - const intptr_t upper = mp->mp_upper - (leaf_bytes - sizeof(indx_t)); - if (unlikely(lower > upper)) { - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PAGE_FULL; - } - mp->mp_lower = (indx_t)lower; - mp->mp_ptrs[indx] = mp->mp_upper = (indx_t)upper; - - /* Write the node data. */ - MDBX_node *node = page_node(mp, indx); - node_set_ks(node, key->iov_len); - node_set_flags(node, (uint8_t)flags); - UNALIGNED_POKE_8(node, MDBX_node, mn_extra, 0); - node_set_ds(node, data->iov_len); - memcpy(node_key(node), key->iov_base, key->iov_len); - - void *nodedata = node_data(node); - if (likely(largepage == NULL)) { - if (unlikely(flags & F_BIGDATA)) - memcpy(nodedata, data->iov_base, sizeof(pgno_t)); - else if (unlikely(flags & MDBX_RESERVE)) - data->iov_base = nodedata; - else if (likely(nodedata != data->iov_base)) - memcpy(nodedata, data->iov_base, data->iov_len); - } else { - poke_pgno(nodedata, largepage->mp_pgno); - nodedata = page_data(largepage); - if (unlikely(flags & MDBX_RESERVE)) - data->iov_base = nodedata; - else if (likely(nodedata != data->iov_base)) - memcpy(nodedata, data->iov_base, data->iov_len); - } - return MDBX_SUCCESS; -} - -/* Delete the specified node from a page. - * [in] mc Cursor pointing to the node to delete. - * [in] ksize The size of a node. Only used if the page is - * part of a MDBX_DUPFIXED database. */ -static void mdbx_node_del(MDBX_cursor *mc, size_t ksize) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - int indx = mc->mc_ki[mc->mc_top]; - int i, j, nkeys, ptr; - MDBX_node *node; - char *base; - - mdbx_debug("delete node %u on %s page %" PRIaPGNO, indx, - IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno); - nkeys = page_numkeys(mp); - mdbx_cassert(mc, indx < nkeys); - - if (IS_LEAF2(mp)) { - mdbx_cassert(mc, ksize >= sizeof(indx_t)); - unsigned diff = nkeys - 1 - indx; - base = page_leaf2key(mp, indx, ksize); - if (diff) - memmove(base, base + ksize, diff * ksize); - mdbx_cassert(mc, mp->mp_lower >= sizeof(indx_t)); - mp->mp_lower -= sizeof(indx_t); - mdbx_cassert(mc, - (size_t)UINT16_MAX - mp->mp_upper >= ksize - sizeof(indx_t)); - mp->mp_upper += (indx_t)(ksize - sizeof(indx_t)); - return; - } - - node = page_node(mp, indx); - size_t sz = NODESIZE + node_ks(node); - if (IS_LEAF(mp)) { - if (F_ISSET(node_flags(node), F_BIGDATA)) - sz += sizeof(pgno_t); - else - sz += node_ds(node); - } - sz = EVEN(sz); - - ptr = mp->mp_ptrs[indx]; - for (i = j = 0; i < nkeys; i++) { - if (i != indx) { - mp->mp_ptrs[j] = mp->mp_ptrs[i]; - if (mp->mp_ptrs[i] < ptr) { - mdbx_cassert(mc, (size_t)UINT16_MAX - mp->mp_ptrs[j] >= sz); - mp->mp_ptrs[j] += (indx_t)sz; - } - j++; - } - } - - base = (char *)mp + mp->mp_upper + PAGEHDRSZ; - memmove(base + sz, base, ptr - mp->mp_upper); - - mdbx_cassert(mc, mp->mp_lower >= sizeof(indx_t)); - mp->mp_lower -= sizeof(indx_t); - mdbx_cassert(mc, (size_t)UINT16_MAX - mp->mp_upper >= sz); - mp->mp_upper += (indx_t)sz; -} - -/* Compact the main page after deleting a node on a subpage. - * [in] mp The main page to operate on. - * [in] indx The index of the subpage on the main page. */ -static void mdbx_node_shrink(MDBX_page *mp, unsigned indx) { - MDBX_node *node; - MDBX_page *sp, *xp; - char *base; - size_t nsize, delta, len, ptr; - int i; - - node = page_node(mp, indx); - sp = (MDBX_page *)node_data(node); - delta = page_room(sp); - assert(delta > 0); - - /* Prepare to shift upward, set len = length(subpage part to shift) */ - if (IS_LEAF2(sp)) { - delta &= /* do not make the node uneven-sized */ ~1u; - if (unlikely(delta) == 0) - return; - nsize = node_ds(node) - delta; - assert(nsize % 1 == 0); - len = nsize; - } else { - xp = (MDBX_page *)((char *)sp + delta); /* destination subpage */ - for (i = page_numkeys(sp); --i >= 0;) { - assert(sp->mp_ptrs[i] >= delta); - xp->mp_ptrs[i] = (indx_t)(sp->mp_ptrs[i] - delta); - } - nsize = node_ds(node) - delta; - len = PAGEHDRSZ; - } - sp->mp_upper = sp->mp_lower; - sp->mp_pgno = mp->mp_pgno; - node_set_ds(node, nsize); - - /* Shift upward */ - base = (char *)mp + mp->mp_upper + PAGEHDRSZ; - memmove(base + delta, base, (char *)sp + len - base); - - ptr = mp->mp_ptrs[indx]; - for (i = page_numkeys(mp); --i >= 0;) { - if (mp->mp_ptrs[i] <= ptr) { - assert((size_t)UINT16_MAX - mp->mp_ptrs[i] >= delta); - mp->mp_ptrs[i] += (indx_t)delta; - } - } - assert((size_t)UINT16_MAX - mp->mp_upper >= delta); - mp->mp_upper += (indx_t)delta; -} - -/* Initial setup of a sorted-dups cursor. - * - * Sorted duplicates are implemented as a sub-database for the given key. - * The duplicate data items are actually keys of the sub-database. - * Operations on the duplicate data items are performed using a sub-cursor - * initialized when the sub-database is first accessed. This function does - * the preliminary setup of the sub-cursor, filling in the fields that - * depend only on the parent DB. - * - * [in] mc The main cursor whose sorted-dups cursor is to be initialized. */ -static int mdbx_xcursor_init0(MDBX_cursor *mc) { - MDBX_xcursor *mx = mc->mc_xcursor; - if (unlikely(mx == nullptr)) - return MDBX_CORRUPTED; - - mx->mx_cursor.mc_xcursor = NULL; - mx->mx_cursor.mc_txn = mc->mc_txn; - mx->mx_cursor.mc_db = &mx->mx_db; - mx->mx_cursor.mc_dbx = &mx->mx_dbx; - mx->mx_cursor.mc_dbi = mc->mc_dbi; - mx->mx_cursor.mc_dbflag = &mx->mx_dbflag; - mx->mx_cursor.mc_snum = 0; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB; - mx->mx_dbx.md_name.iov_len = 0; - mx->mx_dbx.md_name.iov_base = NULL; - mx->mx_dbx.md_cmp = mc->mc_dbx->md_dcmp; - mx->mx_dbx.md_dcmp = NULL; - return MDBX_SUCCESS; -} - -/* Final setup of a sorted-dups cursor. - * Sets up the fields that depend on the data from the main cursor. - * [in] mc The main cursor whose sorted-dups cursor is to be initialized. - * [in] node The data containing the MDBX_db record for the sorted-dup database. - */ -static int mdbx_xcursor_init1(MDBX_cursor *mc, MDBX_node *node) { - MDBX_xcursor *mx = mc->mc_xcursor; - if (unlikely(mx == nullptr)) - return MDBX_CORRUPTED; - - if (node_flags(node) & F_SUBDATA) { - if (unlikely(node_ds(node) != sizeof(MDBX_db))) - return MDBX_CORRUPTED; - memcpy(&mx->mx_db, node_data(node), sizeof(MDBX_db)); - mx->mx_cursor.mc_pg[0] = 0; - mx->mx_cursor.mc_snum = 0; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB; - } else { - if (unlikely(node_ds(node) <= PAGEHDRSZ)) - return MDBX_CORRUPTED; - MDBX_page *fp = node_data(node); - mx->mx_db.md_xsize = 0; - mx->mx_db.md_flags = 0; - mx->mx_db.md_depth = 1; - mx->mx_db.md_branch_pages = 0; - mx->mx_db.md_leaf_pages = 1; - mx->mx_db.md_overflow_pages = 0; - mx->mx_db.md_entries = page_numkeys(fp); - mx->mx_db.md_root = fp->mp_pgno; - mx->mx_cursor.mc_snum = 1; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_INITIALIZED | C_SUB; - mx->mx_cursor.mc_pg[0] = fp; - mx->mx_cursor.mc_ki[0] = 0; - if (mc->mc_db->md_flags & MDBX_DUPFIXED) { - mx->mx_db.md_xsize = fp->mp_leaf2_ksize; - if (mc->mc_db->md_flags & MDBX_INTEGERDUP) - mx->mx_db.md_flags = MDBX_INTEGERKEY; - } - } - mdbx_debug("Sub-db -%u root page %" PRIaPGNO, mx->mx_cursor.mc_dbi, - mx->mx_db.md_root); - mx->mx_dbflag = DB_VALID | DB_USRVALID | DB_DUPDATA; - return MDBX_SUCCESS; -} - -/* Fixup a sorted-dups cursor due to underlying update. - * Sets up some fields that depend on the data from the main cursor. - * Almost the same as init1, but skips initialization steps if the - * xcursor had already been used. - * [in] mc The main cursor whose sorted-dups cursor is to be fixed up. - * [in] src_mx The xcursor of an up-to-date cursor. - * [in] new_dupdata True if converting from a non-F_DUPDATA item. */ -static int mdbx_xcursor_init2(MDBX_cursor *mc, MDBX_xcursor *src_mx, - int new_dupdata) { - MDBX_xcursor *mx = mc->mc_xcursor; - if (unlikely(mx == nullptr)) - return MDBX_CORRUPTED; - - if (new_dupdata) { - mx->mx_cursor.mc_snum = 1; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags |= C_INITIALIZED; - mx->mx_cursor.mc_ki[0] = 0; - mx->mx_dbflag = DB_VALID | DB_USRVALID | DB_DUPDATA; - mx->mx_dbx.md_cmp = src_mx->mx_dbx.md_cmp; - } else if (!(mx->mx_cursor.mc_flags & C_INITIALIZED)) { - return MDBX_SUCCESS; - } - mx->mx_db = src_mx->mx_db; - mx->mx_cursor.mc_pg[0] = src_mx->mx_cursor.mc_pg[0]; - mdbx_debug("Sub-db -%u root page %" PRIaPGNO, mx->mx_cursor.mc_dbi, - mx->mx_db.md_root); - return MDBX_SUCCESS; -} - -/* Initialize a cursor for a given transaction and database. */ -static int mdbx_cursor_init(MDBX_cursor *mc, MDBX_txn *txn, MDBX_dbi dbi) { - mc->mc_signature = MDBX_MC_SIGNATURE; - mc->mc_next = NULL; - mc->mc_backup = NULL; - mc->mc_dbi = dbi; - mc->mc_txn = txn; - mc->mc_db = &txn->mt_dbs[dbi]; - mc->mc_dbx = &txn->mt_dbxs[dbi]; - mc->mc_dbflag = &txn->mt_dbflags[dbi]; - mc->mc_snum = 0; - mc->mc_top = 0; - mc->mc_pg[0] = 0; - mc->mc_flags = 0; - mc->mc_ki[0] = 0; - mc->mc_xcursor = NULL; - - if (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) { - STATIC_ASSERT(offsetof(MDBX_cursor_couple, outer) == 0); - MDBX_xcursor *mx = &container_of(mc, MDBX_cursor_couple, outer)->inner; - mdbx_tassert(txn, mx != NULL); - mx->mx_cursor.mc_signature = MDBX_MC_SIGNATURE; - mc->mc_xcursor = mx; - int rc = mdbx_xcursor_init0(mc); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - int rc = MDBX_SUCCESS; - if (unlikely(*mc->mc_dbflag & DB_STALE)) { - rc = mdbx_page_search(mc, NULL, MDBX_PS_ROOTONLY); - rc = (rc != MDBX_NOTFOUND) ? rc : MDBX_SUCCESS; - } - return rc; -} - -int mdbx_cursor_open(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cursor **ret) { - if (unlikely(!ret)) - return MDBX_EINVAL; - *ret = NULL; - - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_VALID))) - return MDBX_EINVAL; - - if (unlikely(dbi == FREE_DBI && !F_ISSET(txn->mt_flags, MDBX_RDONLY))) - return MDBX_EACCESS; - - const size_t size = (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) - ? sizeof(MDBX_cursor_couple) - : sizeof(MDBX_cursor); - - MDBX_cursor *mc; - if (likely((mc = mdbx_malloc(size)) != NULL)) { - rc = mdbx_cursor_init(mc, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_free(mc); - return rc; - } - if (txn->mt_cursors) { - mc->mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = mc; - mc->mc_flags |= C_UNTRACK; - } - } else { - return MDBX_ENOMEM; - } - - *ret = mc; - return MDBX_SUCCESS; -} - -int mdbx_cursor_renew(MDBX_txn *txn, MDBX_cursor *mc) { - if (unlikely(!mc)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE && - mc->mc_signature != MDBX_MC_READY4CLOSE)) - return MDBX_EINVAL; - - int rc = check_txn(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, mc->mc_dbi, DB_VALID))) - return MDBX_EINVAL; - - if (unlikely(mc->mc_backup)) - return MDBX_EINVAL; - - if (unlikely((mc->mc_flags & C_UNTRACK) || txn->mt_cursors)) { - MDBX_cursor **prev = &mc->mc_txn->mt_cursors[mc->mc_dbi]; - while (*prev && *prev != mc) - prev = &(*prev)->mc_next; - if (*prev == mc) - *prev = mc->mc_next; - mc->mc_signature = MDBX_MC_READY4CLOSE; - } - - if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED)) - return MDBX_BAD_TXN; - - return mdbx_cursor_init(mc, txn, mc->mc_dbi); -} - -/* Return the count of duplicate data items for the current key */ -int mdbx_cursor_count(MDBX_cursor *mc, size_t *countp) { - if (unlikely(mc == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = check_txn(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(countp == NULL || !(mc->mc_flags & C_INITIALIZED))) - return MDBX_EINVAL; - - if (!mc->mc_snum) { - *countp = 0; - return MDBX_NOTFOUND; - } - - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - if ((mc->mc_flags & C_EOF) && mc->mc_ki[mc->mc_top] >= page_numkeys(mp)) { - *countp = 0; - return MDBX_NOTFOUND; - } - - *countp = 1; - if (mc->mc_xcursor != NULL) { - MDBX_node *node = page_node(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - mdbx_cassert(mc, mc->mc_xcursor && (mc->mc_xcursor->mx_cursor.mc_flags & - C_INITIALIZED)); - *countp = unlikely(mc->mc_xcursor->mx_db.md_entries > PTRDIFF_MAX) - ? PTRDIFF_MAX - : (size_t)mc->mc_xcursor->mx_db.md_entries; - } - } - return MDBX_SUCCESS; -} - -void mdbx_cursor_close(MDBX_cursor *mc) { - if (mc) { - mdbx_ensure(NULL, mc->mc_signature == MDBX_MC_SIGNATURE || - mc->mc_signature == MDBX_MC_READY4CLOSE); - if (!mc->mc_backup) { - /* Remove from txn, if tracked. - * A read-only txn (!C_UNTRACK) may have been freed already, - * so do not peek inside it. Only write txns track cursors. */ - if ((mc->mc_flags & C_UNTRACK) && mc->mc_txn->mt_cursors) { - MDBX_cursor **prev = &mc->mc_txn->mt_cursors[mc->mc_dbi]; - while (*prev && *prev != mc) - prev = &(*prev)->mc_next; - if (*prev == mc) - *prev = mc->mc_next; - } - mc->mc_signature = 0; - mdbx_free(mc); - } else { - /* cursor closed before nested txn ends */ - mdbx_cassert(mc, mc->mc_signature == MDBX_MC_SIGNATURE); - mc->mc_signature = MDBX_MC_WAIT4EOT; - } - } -} - -MDBX_txn *mdbx_cursor_txn(MDBX_cursor *mc) { - if (unlikely(!mc || mc->mc_signature != MDBX_MC_SIGNATURE)) - return NULL; - MDBX_txn *txn = mc->mc_txn; - if (unlikely(!txn || txn->mt_signature != MDBX_MT_SIGNATURE)) - return NULL; - if (unlikely(txn->mt_flags & MDBX_TXN_FINISHED)) - return NULL; - return txn; -} - -MDBX_dbi mdbx_cursor_dbi(MDBX_cursor *mc) { - if (unlikely(!mc || mc->mc_signature != MDBX_MC_SIGNATURE)) - return UINT_MAX; - return mc->mc_dbi; -} - -/* Replace the key for a branch node with a new key. - * Set MDBX_TXN_ERROR on failure. - * [in] mc Cursor pointing to the node to operate on. - * [in] key The new key to use. - * Returns 0 on success, non-zero on failure. */ -static int mdbx_update_key(MDBX_cursor *mc, const MDBX_val *key) { - MDBX_page *mp; - MDBX_node *node; - char *base; - size_t len; - int delta, ksize, oksize; - int ptr, i, nkeys, indx; - DKBUF; - - indx = mc->mc_ki[mc->mc_top]; - mp = mc->mc_pg[mc->mc_top]; - node = page_node(mp, indx); - ptr = mp->mp_ptrs[indx]; - if (MDBX_DEBUG) { - MDBX_val k2; - char kbuf2[DKBUF_MAXKEYSIZE * 2 + 1]; - k2.iov_base = node_key(node); - k2.iov_len = node_ks(node); - mdbx_debug("update key %u (ofs %u) [%s] to [%s] on page %" PRIaPGNO, indx, - ptr, mdbx_dump_val(&k2, kbuf2, sizeof(kbuf2)), DKEY(key), - mp->mp_pgno); - } - - /* Sizes must be 2-byte aligned. */ - ksize = EVEN(key->iov_len); - oksize = EVEN(node_ks(node)); - delta = ksize - oksize; - - /* Shift node contents if EVEN(key length) changed. */ - if (delta) { - if (delta > (int)page_room(mp)) { - /* not enough space left, do a delete and split */ - mdbx_debug("Not enough room, delta = %d, splitting...", delta); - pgno_t pgno = node_pgno(node); - mdbx_node_del(mc, 0); - int rc = mdbx_page_split(mc, key, NULL, pgno, MDBX_SPLIT_REPLACE); - if (rc == MDBX_SUCCESS && mdbx_audit_enabled()) - rc = mdbx_cursor_check(mc, true); - return rc; - } - - nkeys = page_numkeys(mp); - for (i = 0; i < nkeys; i++) { - if (mp->mp_ptrs[i] <= ptr) { - mdbx_cassert(mc, mp->mp_ptrs[i] >= delta); - mp->mp_ptrs[i] -= (indx_t)delta; - } - } - - base = (char *)mp + mp->mp_upper + PAGEHDRSZ; - len = ptr - mp->mp_upper + NODESIZE; - memmove(base - delta, base, len); - mdbx_cassert(mc, mp->mp_upper >= delta); - mp->mp_upper -= (indx_t)delta; - - node = page_node(mp, indx); - } - - /* But even if no shift was needed, update ksize */ - node_set_ks(node, key->iov_len); - - memcpy(node_key(node), key->iov_base, key->iov_len); - return MDBX_SUCCESS; -} - -/* Move a node from csrc to cdst. */ -static int mdbx_node_move(MDBX_cursor *csrc, MDBX_cursor *cdst, int fromleft) { - int rc; - DKBUF; - - MDBX_page *psrc = csrc->mc_pg[csrc->mc_top]; - MDBX_page *pdst = cdst->mc_pg[cdst->mc_top]; - mdbx_cassert(csrc, PAGETYPE(psrc) == PAGETYPE(pdst)); - mdbx_cassert(csrc, csrc->mc_dbi == cdst->mc_dbi); - mdbx_cassert(csrc, csrc->mc_top == cdst->mc_top); - if (unlikely(PAGETYPE(psrc) != PAGETYPE(pdst))) { - bailout: - csrc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PROBLEM; - } - - MDBX_val key4move; - switch (PAGETYPE(psrc)) { - case P_BRANCH: { - const MDBX_node *srcnode = page_node(psrc, csrc->mc_ki[csrc->mc_top]); - mdbx_cassert(csrc, node_flags(srcnode) == 0); - const pgno_t srcpg = node_pgno(srcnode); - key4move.iov_len = node_ks(srcnode); - key4move.iov_base = node_key(srcnode); - - if (csrc->mc_ki[csrc->mc_top] == 0) { - const uint16_t snum = csrc->mc_snum; - mdbx_cassert(csrc, snum > 0); - /* must find the lowest key below src */ - rc = mdbx_page_search_lowest(csrc); - MDBX_page *lowest_page = csrc->mc_pg[csrc->mc_top]; - if (unlikely(rc)) - return rc; - mdbx_cassert(csrc, IS_LEAF(lowest_page)); - if (unlikely(!IS_LEAF(lowest_page))) - goto bailout; - if (IS_LEAF2(lowest_page)) { - key4move.iov_len = csrc->mc_db->md_xsize; - key4move.iov_base = page_leaf2key(lowest_page, 0, key4move.iov_len); - } else { - const MDBX_node *lowest_node = page_node(lowest_page, 0); - key4move.iov_len = node_ks(lowest_node); - key4move.iov_base = node_key(lowest_node); - } - - /* restore cursor after mdbx_page_search_lowest() */ - csrc->mc_snum = snum; - csrc->mc_top = snum - 1; - csrc->mc_ki[csrc->mc_top] = 0; - - /* paranoia */ - mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); - mdbx_cassert(csrc, IS_BRANCH(psrc)); - if (unlikely(!IS_BRANCH(psrc))) - goto bailout; - } - - if (cdst->mc_ki[cdst->mc_top] == 0) { - const uint16_t snum = cdst->mc_snum; - mdbx_cassert(csrc, snum > 0); - MDBX_cursor mn; - mdbx_cursor_copy(cdst, &mn); - mn.mc_xcursor = NULL; - /* must find the lowest key below dst */ - rc = mdbx_page_search_lowest(&mn); - if (unlikely(rc)) - return rc; - MDBX_page *const lowest_page = mn.mc_pg[mn.mc_top]; - mdbx_cassert(cdst, IS_LEAF(lowest_page)); - if (unlikely(!IS_LEAF(lowest_page))) - goto bailout; - MDBX_val key; - if (IS_LEAF2(lowest_page)) { - key.iov_len = mn.mc_db->md_xsize; - key.iov_base = page_leaf2key(lowest_page, 0, key.iov_len); - } else { - MDBX_node *lowest_node = page_node(lowest_page, 0); - key.iov_len = node_ks(lowest_node); - key.iov_base = node_key(lowest_node); - } - - /* restore cursor after mdbx_page_search_lowest() */ - mn.mc_snum = snum; - mn.mc_top = snum - 1; - mn.mc_ki[mn.mc_top] = 0; - - const intptr_t delta = - EVEN(key.iov_len) - EVEN(node_ks(page_node(mn.mc_pg[mn.mc_top], 0))); - const intptr_t needed = - branch_size(cdst->mc_txn->mt_env, &key4move) + delta; - const intptr_t have = page_room(pdst); - if (unlikely(needed > have)) - return MDBX_RESULT_TRUE; - - if (unlikely((rc = mdbx_page_touch(csrc)) || - (rc = mdbx_page_touch(cdst)))) - return rc; - psrc = csrc->mc_pg[csrc->mc_top]; - pdst = cdst->mc_pg[cdst->mc_top]; - - rc = mdbx_update_key(&mn, &key); - if (unlikely(rc)) - return rc; - } else { - const size_t needed = branch_size(cdst->mc_txn->mt_env, &key4move); - const size_t have = page_room(pdst); - if (unlikely(needed > have)) - return MDBX_RESULT_TRUE; - - if (unlikely((rc = mdbx_page_touch(csrc)) || - (rc = mdbx_page_touch(cdst)))) - return rc; - psrc = csrc->mc_pg[csrc->mc_top]; - pdst = cdst->mc_pg[cdst->mc_top]; - } - - mdbx_debug("moving %s-node %u [%s] on page %" PRIaPGNO - " to node %u on page %" PRIaPGNO, - "branch", csrc->mc_ki[csrc->mc_top], DKEY(&key4move), - psrc->mp_pgno, cdst->mc_ki[cdst->mc_top], pdst->mp_pgno); - /* Add the node to the destination page. */ - rc = - mdbx_node_add_branch(cdst, cdst->mc_ki[cdst->mc_top], &key4move, srcpg); - } break; - - case P_LEAF: { - /* Mark src and dst as dirty. */ - if (unlikely((rc = mdbx_page_touch(csrc)) || (rc = mdbx_page_touch(cdst)))) - return rc; - psrc = csrc->mc_pg[csrc->mc_top]; - pdst = cdst->mc_pg[cdst->mc_top]; - const MDBX_node *srcnode = page_node(psrc, csrc->mc_ki[csrc->mc_top]); - MDBX_val data; - data.iov_len = node_ds(srcnode); - data.iov_base = node_data(srcnode); - key4move.iov_len = node_ks(srcnode); - key4move.iov_base = node_key(srcnode); - mdbx_debug("moving %s-node %u [%s] on page %" PRIaPGNO - " to node %u on page %" PRIaPGNO, - "leaf", csrc->mc_ki[csrc->mc_top], DKEY(&key4move), - psrc->mp_pgno, cdst->mc_ki[cdst->mc_top], pdst->mp_pgno); - /* Add the node to the destination page. */ - rc = mdbx_node_add_leaf(cdst, cdst->mc_ki[cdst->mc_top], &key4move, &data, - node_flags(srcnode)); - } break; - - case P_LEAF | P_LEAF2: { - /* Mark src and dst as dirty. */ - if (unlikely((rc = mdbx_page_touch(csrc)) || (rc = mdbx_page_touch(cdst)))) - return rc; - psrc = csrc->mc_pg[csrc->mc_top]; - pdst = cdst->mc_pg[cdst->mc_top]; - key4move.iov_len = csrc->mc_db->md_xsize; - key4move.iov_base = - page_leaf2key(psrc, csrc->mc_ki[csrc->mc_top], key4move.iov_len); - mdbx_debug("moving %s-node %u [%s] on page %" PRIaPGNO - " to node %u on page %" PRIaPGNO, - "leaf2", csrc->mc_ki[csrc->mc_top], DKEY(&key4move), - psrc->mp_pgno, cdst->mc_ki[cdst->mc_top], pdst->mp_pgno); - /* Add the node to the destination page. */ - rc = mdbx_node_add_leaf2(cdst, cdst->mc_ki[cdst->mc_top], &key4move); - } break; - - default: - goto bailout; - } - - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - /* Delete the node from the source page. */ - mdbx_node_del(csrc, key4move.iov_len); - - mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); - mdbx_cassert(cdst, pdst == cdst->mc_pg[cdst->mc_top]); - mdbx_cassert(csrc, PAGETYPE(psrc) == PAGETYPE(pdst)); - - { - /* Adjust other cursors pointing to mp */ - MDBX_cursor *m2, *m3; - const MDBX_dbi dbi = csrc->mc_dbi; - mdbx_cassert(csrc, csrc->mc_top == cdst->mc_top); - if (fromleft) { - /* If we're adding on the left, bump others up */ - for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (csrc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top) - continue; - if (m3 != cdst && m3->mc_pg[csrc->mc_top] == pdst && - m3->mc_ki[csrc->mc_top] >= cdst->mc_ki[csrc->mc_top]) { - m3->mc_ki[csrc->mc_top]++; - } - if (m3 != csrc && m3->mc_pg[csrc->mc_top] == psrc && - m3->mc_ki[csrc->mc_top] == csrc->mc_ki[csrc->mc_top]) { - m3->mc_pg[csrc->mc_top] = pdst; - m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; - mdbx_cassert(csrc, csrc->mc_top > 0); - m3->mc_ki[csrc->mc_top - 1]++; - } - if (XCURSOR_INITED(m3) && IS_LEAF(psrc)) - XCURSOR_REFRESH(m3, m3->mc_pg[csrc->mc_top], m3->mc_ki[csrc->mc_top]); - } - } else { - /* Adding on the right, bump others down */ - for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (csrc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == csrc) - continue; - if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top) - continue; - if (m3->mc_pg[csrc->mc_top] == psrc) { - if (!m3->mc_ki[csrc->mc_top]) { - m3->mc_pg[csrc->mc_top] = pdst; - m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top]; - mdbx_cassert(csrc, csrc->mc_top > 0); - m3->mc_ki[csrc->mc_top - 1]--; - } else { - m3->mc_ki[csrc->mc_top]--; - } - if (XCURSOR_INITED(m3) && IS_LEAF(psrc)) - XCURSOR_REFRESH(m3, m3->mc_pg[csrc->mc_top], - m3->mc_ki[csrc->mc_top]); - } - } - } - } - - /* Update the parent separators. */ - if (csrc->mc_ki[csrc->mc_top] == 0) { - mdbx_cassert(csrc, csrc->mc_top > 0); - if (csrc->mc_ki[csrc->mc_top - 1] != 0) { - MDBX_val key; - if (IS_LEAF2(psrc)) { - key.iov_len = psrc->mp_leaf2_ksize; - key.iov_base = page_leaf2key(psrc, 0, key.iov_len); - } else { - MDBX_node *srcnode = page_node(psrc, 0); - key.iov_len = node_ks(srcnode); - key.iov_base = node_key(srcnode); - } - mdbx_debug("update separator for source page %" PRIaPGNO " to [%s]", - psrc->mp_pgno, DKEY(&key)); - MDBX_cursor mn; - mdbx_cursor_copy(csrc, &mn); - mn.mc_xcursor = NULL; - mdbx_cassert(csrc, mn.mc_snum > 0); - mn.mc_snum--; - mn.mc_top--; - /* We want mdbx_rebalance to find mn when doing fixups */ - WITH_CURSOR_TRACKING(mn, rc = mdbx_update_key(&mn, &key)); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - if (IS_BRANCH(psrc)) { - const MDBX_val nullkey = {0, 0}; - const indx_t ix = csrc->mc_ki[csrc->mc_top]; - csrc->mc_ki[csrc->mc_top] = 0; - rc = mdbx_update_key(csrc, &nullkey); - csrc->mc_ki[csrc->mc_top] = ix; - mdbx_cassert(csrc, rc == MDBX_SUCCESS); - } - } - - if (cdst->mc_ki[cdst->mc_top] == 0) { - mdbx_cassert(cdst, cdst->mc_top > 0); - if (cdst->mc_ki[cdst->mc_top - 1] != 0) { - MDBX_val key; - if (IS_LEAF2(pdst)) { - key.iov_len = pdst->mp_leaf2_ksize; - key.iov_base = page_leaf2key(pdst, 0, key.iov_len); - } else { - MDBX_node *srcnode = page_node(pdst, 0); - key.iov_len = node_ks(srcnode); - key.iov_base = node_key(srcnode); - } - mdbx_debug("update separator for destination page %" PRIaPGNO " to [%s]", - pdst->mp_pgno, DKEY(&key)); - MDBX_cursor mn; - mdbx_cursor_copy(cdst, &mn); - mn.mc_xcursor = NULL; - mdbx_cassert(cdst, mn.mc_snum > 0); - mn.mc_snum--; - mn.mc_top--; - /* We want mdbx_rebalance to find mn when doing fixups */ - WITH_CURSOR_TRACKING(mn, rc = mdbx_update_key(&mn, &key)); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - if (IS_BRANCH(pdst)) { - const MDBX_val nullkey = {0, 0}; - const indx_t ix = cdst->mc_ki[cdst->mc_top]; - cdst->mc_ki[cdst->mc_top] = 0; - rc = mdbx_update_key(cdst, &nullkey); - cdst->mc_ki[cdst->mc_top] = ix; - mdbx_cassert(cdst, rc == MDBX_SUCCESS); - } - } - - return MDBX_SUCCESS; -} - -/* Merge one page into another. - * - * The nodes from the page pointed to by csrc will be copied to the page - * pointed to by cdst and then the csrc page will be freed. - * - * [in] csrc Cursor pointing to the source page. - * [in] cdst Cursor pointing to the destination page. - * - * Returns 0 on success, non-zero on failure. */ -static int mdbx_page_merge(MDBX_cursor *csrc, MDBX_cursor *cdst) { - MDBX_val key; - int rc; - - mdbx_cassert(csrc, csrc != cdst); - const MDBX_page *const psrc = csrc->mc_pg[csrc->mc_top]; - MDBX_page *pdst = cdst->mc_pg[cdst->mc_top]; - mdbx_debug("merging page %" PRIaPGNO " into %" PRIaPGNO, psrc->mp_pgno, - pdst->mp_pgno); - - mdbx_cassert(csrc, PAGETYPE(psrc) == PAGETYPE(pdst)); - mdbx_cassert(csrc, - csrc->mc_dbi == cdst->mc_dbi && csrc->mc_db == cdst->mc_db); - mdbx_cassert(csrc, csrc->mc_snum > 1); /* can't merge root page */ - mdbx_cassert(cdst, cdst->mc_snum > 1); - mdbx_cassert(cdst, cdst->mc_snum < cdst->mc_db->md_depth || - IS_LEAF(cdst->mc_pg[cdst->mc_db->md_depth - 1])); - mdbx_cassert(csrc, csrc->mc_snum < csrc->mc_db->md_depth || - IS_LEAF(csrc->mc_pg[csrc->mc_db->md_depth - 1])); - mdbx_cassert(cdst, page_room(pdst) >= page_used(cdst->mc_txn->mt_env, psrc)); - const int pagetype = PAGETYPE(psrc); - - /* Move all nodes from src to dst */ - const unsigned dst_nkeys = page_numkeys(pdst); - const unsigned src_nkeys = page_numkeys(psrc); - mdbx_cassert(cdst, dst_nkeys + src_nkeys >= - (unsigned)(IS_LEAF(psrc) ? 1 : MDBX_MINKEYS)); - if (likely(src_nkeys)) { - unsigned j = dst_nkeys; - if (unlikely(pagetype & P_LEAF2)) { - /* Mark dst as dirty. */ - if (unlikely(rc = mdbx_page_touch(cdst))) - return rc; - - key.iov_len = csrc->mc_db->md_xsize; - key.iov_base = page_data(psrc); - unsigned i = 0; - do { - rc = mdbx_node_add_leaf2(cdst, j++, &key); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - key.iov_base = (char *)key.iov_base + key.iov_len; - } while (++i != src_nkeys); - } else { - MDBX_node *srcnode = page_node(psrc, 0); - key.iov_len = node_ks(srcnode); - key.iov_base = node_key(srcnode); - if (pagetype & P_BRANCH) { - MDBX_cursor mn; - mdbx_cursor_copy(csrc, &mn); - mn.mc_xcursor = NULL; - /* must find the lowest key below src */ - rc = mdbx_page_search_lowest(&mn); - if (unlikely(rc)) - return rc; - MDBX_node *lowest = page_node(mn.mc_pg[mn.mc_top], 0); - key.iov_len = node_ks(lowest); - key.iov_base = node_key(lowest); - - const size_t dst_room = page_room(pdst); - const size_t src_used = page_used(cdst->mc_txn->mt_env, psrc); - const size_t space_needed = src_used - node_ks(srcnode) + key.iov_len; - if (unlikely(space_needed > dst_room)) - return MDBX_RESULT_TRUE; - } - - /* Mark dst as dirty. */ - if (unlikely(rc = mdbx_page_touch(cdst))) - return rc; - - unsigned i = 0; - while (true) { - if (pagetype & P_LEAF) { - MDBX_val data; - data.iov_len = node_ds(srcnode); - data.iov_base = node_data(srcnode); - rc = mdbx_node_add_leaf(cdst, j++, &key, &data, node_flags(srcnode)); - } else { - mdbx_cassert(csrc, node_flags(srcnode) == 0); - rc = mdbx_node_add_branch(cdst, j++, &key, node_pgno(srcnode)); - } - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (++i == src_nkeys) - break; - srcnode = page_node(psrc, i); - key.iov_len = node_ks(srcnode); - key.iov_base = node_key(srcnode); - } - } - - pdst = cdst->mc_pg[cdst->mc_top]; - mdbx_debug("dst page %" PRIaPGNO " now has %u keys (%.1f%% filled)", - pdst->mp_pgno, page_numkeys(pdst), - page_fill(cdst->mc_txn->mt_env, pdst)); - - mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); - mdbx_cassert(cdst, pdst == cdst->mc_pg[cdst->mc_top]); - } - - /* Unlink the src page from parent and add to free list. */ - csrc->mc_top--; - mdbx_node_del(csrc, 0); - if (csrc->mc_ki[csrc->mc_top] == 0) { - const MDBX_val nullkey = {0, 0}; - rc = mdbx_update_key(csrc, &nullkey); - if (unlikely(rc)) { - csrc->mc_top++; - return rc; - } - } - csrc->mc_top++; - - mdbx_cassert(csrc, psrc == csrc->mc_pg[csrc->mc_top]); - mdbx_cassert(cdst, pdst == cdst->mc_pg[cdst->mc_top]); - - { - /* Adjust other cursors pointing to mp */ - MDBX_cursor *m2, *m3; - const MDBX_dbi dbi = csrc->mc_dbi; - const unsigned top = csrc->mc_top; - - for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (csrc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == csrc || top >= m3->mc_snum) - continue; - if (m3->mc_pg[top] == psrc) { - m3->mc_pg[top] = pdst; - mdbx_cassert(m3, dst_nkeys + m3->mc_ki[top] <= UINT16_MAX); - m3->mc_ki[top] += (indx_t)dst_nkeys; - m3->mc_ki[top - 1] = cdst->mc_ki[top - 1]; - } else if (m3->mc_pg[top - 1] == csrc->mc_pg[top - 1] && - m3->mc_ki[top - 1] > csrc->mc_ki[top - 1]) { - m3->mc_ki[top - 1]--; - } - if (XCURSOR_INITED(m3) && IS_LEAF(psrc)) - XCURSOR_REFRESH(m3, m3->mc_pg[top], m3->mc_ki[top]); - } - } - - /* If not operating on GC, allow this page to be reused - * in this txn. Otherwise just add to free list. */ - rc = mdbx_page_retire(csrc, (MDBX_page *)psrc); - if (unlikely(rc)) - return rc; - - mdbx_cassert(cdst, cdst->mc_db->md_entries > 0); - mdbx_cassert(cdst, cdst->mc_snum <= cdst->mc_db->md_depth); - mdbx_cassert(cdst, cdst->mc_top > 0); - mdbx_cassert(cdst, cdst->mc_snum == cdst->mc_top + 1); - MDBX_page *const top_page = cdst->mc_pg[cdst->mc_top]; - const indx_t top_indx = cdst->mc_ki[cdst->mc_top]; - const uint16_t save_snum = cdst->mc_snum; - const uint16_t save_depth = cdst->mc_db->md_depth; - mdbx_cursor_pop(cdst); - rc = mdbx_rebalance(cdst); - if (unlikely(rc)) - return rc; - - mdbx_cassert(cdst, cdst->mc_db->md_entries > 0); - mdbx_cassert(cdst, cdst->mc_snum <= cdst->mc_db->md_depth); - mdbx_cassert(cdst, cdst->mc_snum == cdst->mc_top + 1); - - if (IS_LEAF(cdst->mc_pg[cdst->mc_top])) { - /* LY: don't touch cursor if top-page is a LEAF */ - mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || - PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); - return MDBX_SUCCESS; - } - - mdbx_cassert(cdst, page_numkeys(top_page) == dst_nkeys + src_nkeys); - - if (pagetype != PAGETYPE(top_page)) { - /* LY: LEAF-page becomes BRANCH, unable restore cursor's stack */ - goto bailout; - } - - if (top_page == cdst->mc_pg[cdst->mc_top]) { - /* LY: don't touch cursor if prev top-page already on the top */ - mdbx_cassert(cdst, cdst->mc_ki[cdst->mc_top] == top_indx); - mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || - PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); - return MDBX_SUCCESS; - } - - const int new_snum = save_snum - save_depth + cdst->mc_db->md_depth; - if (unlikely(new_snum < 1 || new_snum > cdst->mc_db->md_depth)) { - /* LY: out of range, unable restore cursor's stack */ - goto bailout; - } - - if (top_page == cdst->mc_pg[new_snum - 1]) { - mdbx_cassert(cdst, cdst->mc_ki[new_snum - 1] == top_indx); - /* LY: restore cursor stack */ - cdst->mc_snum = (uint16_t)new_snum; - cdst->mc_top = (uint16_t)new_snum - 1; - mdbx_cassert(cdst, cdst->mc_snum < cdst->mc_db->md_depth || - IS_LEAF(cdst->mc_pg[cdst->mc_db->md_depth - 1])); - mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || - PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); - return MDBX_SUCCESS; - } - - MDBX_page *const stub_page = (MDBX_page *)(~(uintptr_t)top_page); - const indx_t stub_indx = top_indx; - if (save_depth > cdst->mc_db->md_depth && - ((cdst->mc_pg[save_snum - 1] == top_page && - cdst->mc_ki[save_snum - 1] == top_indx) || - (cdst->mc_pg[save_snum - 1] == stub_page && - cdst->mc_ki[save_snum - 1] == stub_indx))) { - /* LY: restore cursor stack */ - cdst->mc_pg[new_snum - 1] = top_page; - cdst->mc_ki[new_snum - 1] = top_indx; - cdst->mc_pg[new_snum] = (MDBX_page *)(~(uintptr_t)cdst->mc_pg[new_snum]); - cdst->mc_ki[new_snum] = ~cdst->mc_ki[new_snum]; - cdst->mc_snum = (uint16_t)new_snum; - cdst->mc_top = (uint16_t)new_snum - 1; - mdbx_cassert(cdst, cdst->mc_snum < cdst->mc_db->md_depth || - IS_LEAF(cdst->mc_pg[cdst->mc_db->md_depth - 1])); - mdbx_cassert(cdst, IS_LEAF(cdst->mc_pg[cdst->mc_top]) || - PAGETYPE(cdst->mc_pg[cdst->mc_top]) == pagetype); - return MDBX_SUCCESS; - } - -bailout: - /* LY: unable restore cursor's stack */ - cdst->mc_flags &= ~C_INITIALIZED; - return MDBX_CURSOR_FULL; -} - -/* Copy the contents of a cursor. - * [in] csrc The cursor to copy from. - * [out] cdst The cursor to copy to. */ -static void mdbx_cursor_copy(const MDBX_cursor *csrc, MDBX_cursor *cdst) { - mdbx_cassert(csrc, - csrc->mc_txn->mt_txnid >= *csrc->mc_txn->mt_env->me_oldest); - cdst->mc_txn = csrc->mc_txn; - cdst->mc_dbi = csrc->mc_dbi; - cdst->mc_db = csrc->mc_db; - cdst->mc_dbx = csrc->mc_dbx; - cdst->mc_snum = csrc->mc_snum; - cdst->mc_top = csrc->mc_top; - cdst->mc_flags = csrc->mc_flags; - - for (unsigned i = 0; i < csrc->mc_snum; i++) { - cdst->mc_pg[i] = csrc->mc_pg[i]; - cdst->mc_ki[i] = csrc->mc_ki[i]; - } -} - -/* Rebalance the tree after a delete operation. - * [in] mc Cursor pointing to the page where rebalancing should begin. - * Returns 0 on success, non-zero on failure. */ -static int mdbx_rebalance(MDBX_cursor *mc) { - int rc; - - mdbx_cassert(mc, mc->mc_snum > 0); - mdbx_cassert(mc, mc->mc_snum < mc->mc_db->md_depth || - IS_LEAF(mc->mc_pg[mc->mc_db->md_depth - 1])); - const int pagetype = PAGETYPE(mc->mc_pg[mc->mc_top]); - - const unsigned minkeys = (P_BRANCH == 1) ? (pagetype & P_BRANCH) + 1 - : (pagetype & P_BRANCH) ? 2 : 1; - - /* The threshold of minimum page fill factor, in form of a negative binary - * exponent, i.e. 2 means 1/(2**3) == 1/4 == 25%. Pages emptier than this - * are candidates for merging. */ - const unsigned threshold_fill_exp2 = 2; - - /* The threshold of minimum page fill factor, as a number of free bytes on a - * page. Pages emptier than this are candidates for merging. */ - const unsigned spaceleft_threshold = - page_space(mc->mc_txn->mt_env) - - (page_space(mc->mc_txn->mt_env) >> threshold_fill_exp2); - - mdbx_debug("rebalancing %s page %" PRIaPGNO " (has %u keys, %.1f%% full)", - (pagetype & P_LEAF) ? "leaf" : "branch", - mc->mc_pg[mc->mc_top]->mp_pgno, - page_numkeys(mc->mc_pg[mc->mc_top]), - page_fill(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top])); - - if (page_fill_enough(mc->mc_pg[mc->mc_top], spaceleft_threshold, minkeys)) { - mdbx_debug("no need to rebalance page %" PRIaPGNO ", above fill threshold", - mc->mc_pg[mc->mc_top]->mp_pgno); - mdbx_cassert(mc, mc->mc_db->md_entries > 0); - return MDBX_SUCCESS; - } - - if (mc->mc_snum < 2) { - MDBX_page *const mp = mc->mc_pg[0]; - const unsigned nkeys = page_numkeys(mp); - mdbx_cassert(mc, (mc->mc_db->md_entries == 0) == (nkeys == 0)); - if (IS_SUBP(mp)) { - mdbx_debug("%s", "Can't rebalance a subpage, ignoring"); - mdbx_cassert(mc, pagetype & P_LEAF); - return MDBX_SUCCESS; - } - if (nkeys == 0) { - mdbx_cassert(mc, IS_LEAF(mp)); - mdbx_debug("%s", "tree is completely empty"); - mc->mc_db->md_root = P_INVALID; - mc->mc_db->md_depth = 0; - mdbx_cassert(mc, mc->mc_db->md_branch_pages == 0 && - mc->mc_db->md_overflow_pages == 0 && - mc->mc_db->md_leaf_pages == 1); - /* Adjust cursors pointing to mp */ - const MDBX_dbi dbi = mc->mc_dbi; - for (MDBX_cursor *m2 = mc->mc_txn->mt_cursors[dbi]; m2; - m2 = m2->mc_next) { - MDBX_cursor *m3 = - (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == mc || !(m3->mc_flags & C_INITIALIZED)) - continue; - if (m3->mc_pg[0] == mp) { - m3->mc_snum = 0; - m3->mc_top = 0; - m3->mc_flags &= ~C_INITIALIZED; - } - } - mc->mc_snum = 0; - mc->mc_top = 0; - mc->mc_flags &= ~C_INITIALIZED; - - rc = mdbx_page_retire(mc, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } else if (IS_BRANCH(mp) && nkeys == 1) { - mdbx_debug("%s", "collapsing root page!"); - mc->mc_db->md_root = node_pgno(page_node(mp, 0)); - rc = mdbx_page_get(mc, mc->mc_db->md_root, &mc->mc_pg[0], NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - mc->mc_db->md_depth--; - mc->mc_ki[0] = mc->mc_ki[1]; - for (int i = 1; i < mc->mc_db->md_depth; i++) { - mc->mc_pg[i] = mc->mc_pg[i + 1]; - mc->mc_ki[i] = mc->mc_ki[i + 1]; - } - - /* Adjust other cursors pointing to mp */ - MDBX_cursor *m2, *m3; - MDBX_dbi dbi = mc->mc_dbi; - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == mc || !(m3->mc_flags & C_INITIALIZED)) - continue; - if (m3->mc_pg[0] == mp) { - for (int i = 0; i < mc->mc_db->md_depth; i++) { - m3->mc_pg[i] = m3->mc_pg[i + 1]; - m3->mc_ki[i] = m3->mc_ki[i + 1]; - } - m3->mc_snum--; - m3->mc_top--; - } - } - mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top]) || - PAGETYPE(mc->mc_pg[mc->mc_top]) == pagetype); - mdbx_cassert(mc, mc->mc_snum < mc->mc_db->md_depth || - IS_LEAF(mc->mc_pg[mc->mc_db->md_depth - 1])); - - rc = mdbx_page_retire(mc, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } else { - mdbx_debug("root page %" PRIaPGNO - " doesn't need rebalancing (flags 0x%x)", - mp->mp_pgno, mp->mp_flags); - } - return MDBX_SUCCESS; - } - - /* The parent (branch page) must have at least 2 pointers, - * otherwise the tree is invalid. */ - const unsigned pre_top = mc->mc_top - 1; - mdbx_cassert(mc, IS_BRANCH(mc->mc_pg[pre_top])); - mdbx_cassert(mc, !IS_SUBP(mc->mc_pg[0])); - mdbx_cassert(mc, page_numkeys(mc->mc_pg[pre_top]) > 1); - - /* Leaf page fill factor is below the threshold. - * Try to move keys from left or right neighbor, or - * merge with a neighbor page. */ - - /* Find neighbors. */ - MDBX_cursor mn; - mdbx_cursor_copy(mc, &mn); - mn.mc_xcursor = NULL; - - MDBX_page *left = nullptr, *right = nullptr; - if (mn.mc_ki[pre_top] > 0) { - rc = mdbx_page_get( - &mn, node_pgno(page_node(mn.mc_pg[pre_top], mn.mc_ki[pre_top] - 1)), - &left, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - mdbx_cassert(mc, PAGETYPE(left) == PAGETYPE(mc->mc_pg[mc->mc_top])); - } - if (mn.mc_ki[pre_top] + 1u < page_numkeys(mn.mc_pg[pre_top])) { - rc = mdbx_page_get( - &mn, node_pgno(page_node(mn.mc_pg[pre_top], mn.mc_ki[pre_top] + 1)), - &right, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - mdbx_cassert(mc, PAGETYPE(right) == PAGETYPE(mc->mc_pg[mc->mc_top])); - } - - const indx_t ki_top = mc->mc_ki[mc->mc_top]; - const indx_t ki_pre_top = mn.mc_ki[pre_top]; - const indx_t nkeys = (indx_t)page_numkeys(mn.mc_pg[mn.mc_top]); - if (left && page_room(left) > spaceleft_threshold && - (!right || page_room(right) < page_room(left))) { - /* try merge with left */ - mdbx_cassert(mc, page_numkeys(left) >= minkeys); - mn.mc_pg[mn.mc_top] = left; - mn.mc_ki[mn.mc_top - 1] = ki_pre_top - 1; - mn.mc_ki[mn.mc_top] = (indx_t)(page_numkeys(left) - 1); - mc->mc_ki[mc->mc_top] = 0; - const indx_t new_ki = (indx_t)(ki_top + page_numkeys(left)); - mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1; - /* We want mdbx_rebalance to find mn when doing fixups */ - WITH_CURSOR_TRACKING(mn, rc = mdbx_page_merge(mc, &mn)); - if (likely(rc != MDBX_RESULT_TRUE)) { - mdbx_cursor_copy(&mn, mc); - mc->mc_ki[mc->mc_top] = new_ki; - mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); - return rc; - } - } - if (right && page_room(right) > spaceleft_threshold) { - /* try merge with right */ - mdbx_cassert(mc, page_numkeys(right) >= minkeys); - mn.mc_pg[mn.mc_top] = right; - mn.mc_ki[mn.mc_top - 1] = ki_pre_top + 1; - mn.mc_ki[mn.mc_top] = 0; - mc->mc_ki[mc->mc_top] = nkeys; - rc = mdbx_page_merge(&mn, mc); - if (likely(rc != MDBX_RESULT_TRUE)) { - mc->mc_ki[mc->mc_top] = ki_top; - mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); - return rc; - } - } - if (left && page_numkeys(left) > minkeys && - (!right || page_numkeys(right) <= minkeys || - page_room(right) > page_room(left))) { - /* try move from left */ - mn.mc_pg[mn.mc_top] = left; - mn.mc_ki[mn.mc_top - 1] = ki_pre_top - 1; - mn.mc_ki[mn.mc_top] = (indx_t)(page_numkeys(left) - 1); - mc->mc_ki[mc->mc_top] = 0; - rc = mdbx_node_move(&mn, mc, true); - if (likely(rc != MDBX_RESULT_TRUE)) { - mc->mc_ki[mc->mc_top] = ki_top + 1; - mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); - return rc; - } - } - if (right && page_numkeys(right) > minkeys) { - /* try move from right */ - mn.mc_pg[mn.mc_top] = right; - mn.mc_ki[mn.mc_top - 1] = ki_pre_top + 1; - mn.mc_ki[mn.mc_top] = 0; - mc->mc_ki[mc->mc_top] = nkeys; - rc = mdbx_node_move(&mn, mc, false); - if (likely(rc != MDBX_RESULT_TRUE)) { - mc->mc_ki[mc->mc_top] = ki_top; - mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); - return rc; - } - } - - if (nkeys >= minkeys) - return MDBX_SUCCESS; - - if (left && (!right || page_room(left) > page_room(right))) { - /* try merge with left */ - mdbx_cassert(mc, page_numkeys(left) >= minkeys); - mn.mc_pg[mn.mc_top] = left; - mn.mc_ki[mn.mc_top - 1] = ki_pre_top - 1; - mn.mc_ki[mn.mc_top] = (indx_t)(page_numkeys(left) - 1); - mc->mc_ki[mc->mc_top] = 0; - const indx_t new_ki = (indx_t)(ki_top + page_numkeys(left)); - mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1; - /* We want mdbx_rebalance to find mn when doing fixups */ - WITH_CURSOR_TRACKING(mn, rc = mdbx_page_merge(mc, &mn)); - if (likely(rc != MDBX_RESULT_TRUE)) { - mdbx_cursor_copy(&mn, mc); - mc->mc_ki[mc->mc_top] = new_ki; - mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); - return rc; - } - } else if (likely(right)) { - /* try merge with right */ - mdbx_cassert(mc, page_numkeys(right) >= minkeys); - mn.mc_pg[mn.mc_top] = right; - mn.mc_ki[mn.mc_top - 1] = ki_pre_top + 1; - mn.mc_ki[mn.mc_top] = 0; - mc->mc_ki[mc->mc_top] = nkeys; - rc = mdbx_page_merge(&mn, mc); - if (likely(rc != MDBX_RESULT_TRUE)) { - mc->mc_ki[mc->mc_top] = ki_top; - mdbx_cassert(mc, rc || page_numkeys(mc->mc_pg[mc->mc_top]) >= minkeys); - return rc; - } - } - return MDBX_PROBLEM; -} - -static __cold int mdbx_page_check(MDBX_env *env, const MDBX_page *const mp, - bool maybe_unfinished) { - const unsigned nkeys = page_numkeys(mp); - char *const end_of_page = (char *)mp + env->me_psize; - mdbx_assert(env, mp->mp_pgno >= MIN_PAGENO && mp->mp_pgno <= MAX_PAGENO); - if (unlikely(mp->mp_pgno < MIN_PAGENO || mp->mp_pgno > MAX_PAGENO)) - return MDBX_CORRUPTED; - if (IS_OVERFLOW(mp)) { - mdbx_assert(env, mp->mp_pages >= 1 && mp->mp_pages < MAX_PAGENO / 2); - if (unlikely(mp->mp_pages < 1 && mp->mp_pages >= MAX_PAGENO / 2)) - return MDBX_CORRUPTED; - mdbx_assert(env, mp->mp_pgno <= MAX_PAGENO - mp->mp_pages); - if (unlikely(mp->mp_pgno > MAX_PAGENO - mp->mp_pages)) - return MDBX_CORRUPTED; - return MDBX_SUCCESS; - } - if (!(IS_DIRTY(mp) && maybe_unfinished)) { - mdbx_assert(env, nkeys >= 2 || !IS_BRANCH(mp)); - if (unlikely(nkeys < 2 && IS_BRANCH(mp))) - return MDBX_CORRUPTED; - } - - for (unsigned i = IS_LEAF(mp) ? 0 : 1; i < nkeys; ++i) { - if (IS_LEAF2(mp)) { - const size_t ksize = mp->mp_leaf2_ksize; - const char *const key = page_leaf2key(mp, i, ksize); - mdbx_assert(env, key + ksize <= end_of_page); - if (unlikely(end_of_page < key + ksize)) - return MDBX_CORRUPTED; - } else { - const MDBX_node *const node = page_node(mp, i); - const char *node_end = (char *)node + NODESIZE; - mdbx_assert(env, node_end <= end_of_page); - if (unlikely(node_end > end_of_page)) - return MDBX_CORRUPTED; - if (IS_LEAF(mp) || i > 0) { - size_t ksize = node_ks(node); - char *key = node_key(node); - mdbx_assert(env, key + ksize <= end_of_page); - if (unlikely(end_of_page < key + ksize)) - return MDBX_CORRUPTED; - } - if (IS_BRANCH(mp)) - continue; - if (node_flags(node) == F_BIGDATA /* data on large-page */) { - continue; - } - const size_t dsize = node_ds(node); - const char *const data = node_data(node); - mdbx_assert(env, data + dsize <= end_of_page); - if (unlikely(end_of_page < data + dsize)) - return MDBX_CORRUPTED; - - switch (node_flags(node)) { - default: - mdbx_assert(env, false); - return MDBX_CORRUPTED; - case 0 /* usual */: - break; - case F_SUBDATA /* sub-db */: - mdbx_assert(env, dsize >= sizeof(MDBX_db)); - if (unlikely(dsize < sizeof(MDBX_db))) - return MDBX_CORRUPTED; - break; - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: - mdbx_assert(env, dsize == sizeof(MDBX_db)); - if (unlikely(dsize != sizeof(MDBX_db))) - return MDBX_CORRUPTED; - break; - case F_DUPDATA /* short sub-page */: - mdbx_assert(env, dsize > PAGEHDRSZ); - if (unlikely(dsize <= PAGEHDRSZ)) - return MDBX_CORRUPTED; - else { - const MDBX_page *const sp = (MDBX_page *)data; - const char *const end_of_subpage = data + dsize; - const int nsubkeys = page_numkeys(sp); - switch (sp->mp_flags & ~P_DIRTY /* ignore for sub-pages */) { - case P_LEAF | P_SUBP: - case P_LEAF | P_LEAF2 | P_SUBP: - break; - default: - mdbx_assert(env, false); - return MDBX_CORRUPTED; - } - - for (int j = 0; j < nsubkeys; j++) { - if (IS_LEAF2(sp)) { - /* LEAF2 pages have no mp_ptrs[] or node headers */ - size_t sub_ksize = sp->mp_leaf2_ksize; - char *sub_key = page_leaf2key(sp, j, sub_ksize); - mdbx_assert(env, sub_key + sub_ksize <= end_of_subpage); - if (unlikely(end_of_subpage < sub_key + sub_ksize)) - return MDBX_CORRUPTED; - } else { - mdbx_assert(env, IS_LEAF(sp)); - if (unlikely(!IS_LEAF(sp))) - return MDBX_CORRUPTED; - const MDBX_node *const sub_node = page_node(sp, j); - const char *sub_node_end = (char *)sub_node + NODESIZE; - mdbx_assert(env, sub_node_end <= end_of_subpage); - if (unlikely(sub_node_end > end_of_subpage)) - return MDBX_CORRUPTED; - mdbx_assert(env, node_flags(sub_node) == 0); - if (unlikely(node_flags(sub_node) != 0)) - return MDBX_CORRUPTED; - - size_t sub_ksize = node_ks(sub_node); - char *sub_key = node_key(sub_node); - size_t sub_dsize = node_ds(sub_node); - char *sub_data = node_data(sub_node); - mdbx_assert(env, sub_key + sub_ksize <= end_of_subpage); - if (unlikely(end_of_subpage < sub_key + sub_ksize)) - return MDBX_CORRUPTED; - mdbx_assert(env, sub_data + sub_dsize <= end_of_subpage); - if (unlikely(end_of_subpage < sub_data + sub_dsize)) - return MDBX_CORRUPTED; - } - } - } - break; - } - } - } - return MDBX_SUCCESS; -} - -static __cold int mdbx_cursor_check(MDBX_cursor *mc, bool pending) { - mdbx_tassert(mc->mc_txn, mc->mc_txn->mt_parent || - mc->mc_txn->tw.dirtyroom + - mc->mc_txn->tw.dirtylist->length == - MDBX_DPL_TXNFULL); - mdbx_cassert(mc, mc->mc_top == mc->mc_snum - 1); - if (unlikely(mc->mc_top != mc->mc_snum - 1)) - return MDBX_CURSOR_FULL; - mdbx_cassert(mc, pending ? mc->mc_snum <= mc->mc_db->md_depth - : mc->mc_snum == mc->mc_db->md_depth); - if (unlikely(pending ? mc->mc_snum > mc->mc_db->md_depth - : mc->mc_snum != mc->mc_db->md_depth)) - return MDBX_CURSOR_FULL; - - for (int n = 0; n < mc->mc_snum; ++n) { - MDBX_page *mp = mc->mc_pg[n]; - const unsigned nkeys = page_numkeys(mp); - const bool expect_branch = (n < mc->mc_db->md_depth - 1) ? true : false; - const bool expect_nested_leaf = - (n + 1 == mc->mc_db->md_depth - 1) ? true : false; - const bool branch = IS_BRANCH(mp) ? true : false; - mdbx_cassert(mc, branch == expect_branch); - if (unlikely(branch != expect_branch)) - return MDBX_CURSOR_FULL; - if (!pending) { - mdbx_cassert(mc, - nkeys > mc->mc_ki[n] || (!branch && nkeys == mc->mc_ki[n] && - (mc->mc_flags & C_EOF) != 0)); - if (unlikely(nkeys <= mc->mc_ki[n] && - !(!branch && nkeys == mc->mc_ki[n] && - (mc->mc_flags & C_EOF) != 0))) - return MDBX_CURSOR_FULL; - } else { - mdbx_cassert(mc, nkeys + 1 >= mc->mc_ki[n]); - if (unlikely(nkeys + 1 < mc->mc_ki[n])) - return MDBX_CURSOR_FULL; - } - - int err = mdbx_page_check(mc->mc_txn->mt_env, mp, pending); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - for (unsigned i = 0; i < nkeys; ++i) { - if (branch) { - MDBX_node *node = page_node(mp, i); - mdbx_cassert(mc, node_flags(node) == 0); - if (unlikely(node_flags(node) != 0)) - return MDBX_CURSOR_FULL; - pgno_t pgno = node_pgno(node); - MDBX_page *np; - int rc = mdbx_page_get(mc, pgno, &np, NULL); - mdbx_cassert(mc, rc == MDBX_SUCCESS); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - const bool nested_leaf = IS_LEAF(np) ? true : false; - mdbx_cassert(mc, nested_leaf == expect_nested_leaf); - if (unlikely(nested_leaf != expect_nested_leaf)) - return MDBX_CURSOR_FULL; - err = mdbx_page_check(mc->mc_txn->mt_env, np, pending); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - } - } - return MDBX_SUCCESS; -} - -/* Complete a delete operation started by mdbx_cursor_del(). */ -static int mdbx_cursor_del0(MDBX_cursor *mc) { - int rc; - MDBX_page *mp; - indx_t ki; - unsigned nkeys; - MDBX_cursor *m2, *m3; - MDBX_dbi dbi = mc->mc_dbi; - - mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - ki = mc->mc_ki[mc->mc_top]; - mp = mc->mc_pg[mc->mc_top]; - mdbx_node_del(mc, mc->mc_db->md_xsize); - mc->mc_db->md_entries--; - { - /* Adjust other cursors pointing to mp */ - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == mc || !(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) - continue; - if (m3->mc_snum < mc->mc_snum) - continue; - if (m3->mc_pg[mc->mc_top] == mp) { - if (m3->mc_ki[mc->mc_top] == ki) { - m3->mc_flags |= C_DEL; - if (mc->mc_db->md_flags & MDBX_DUPSORT) { - /* Sub-cursor referred into dataset which is gone */ - m3->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED | C_EOF); - } - continue; - } else if (m3->mc_ki[mc->mc_top] > ki) { - m3->mc_ki[mc->mc_top]--; - } - if (XCURSOR_INITED(m3)) - XCURSOR_REFRESH(m3, m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]); - } - } - } - rc = mdbx_rebalance(mc); - - if (likely(rc == MDBX_SUCCESS)) { - /* DB is totally empty now, just bail out. - * Other cursors adjustments were already done - * by mdbx_rebalance and aren't needed here. */ - if (!mc->mc_snum) { - mdbx_cassert(mc, mc->mc_db->md_entries == 0 && mc->mc_db->md_depth == 0 && - mc->mc_db->md_root == P_INVALID); - mc->mc_flags |= C_DEL | C_EOF; - return rc; - } - - ki = mc->mc_ki[mc->mc_top]; - mp = mc->mc_pg[mc->mc_top]; - mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top])); - nkeys = page_numkeys(mp); - mdbx_cassert(mc, (mc->mc_db->md_entries > 0 && nkeys > 0) || - ((mc->mc_flags & C_SUB) && - mc->mc_db->md_entries == 0 && nkeys == 0)); - - /* Adjust THIS and other cursors pointing to mp */ - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == mc || !(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) - continue; - if (m3->mc_snum < mc->mc_snum) - continue; - if (m3->mc_pg[mc->mc_top] == mp) { - /* if m3 points past last node in page, find next sibling */ - if (m3->mc_ki[mc->mc_top] >= nkeys) { - rc = mdbx_cursor_sibling(m3, true); - if (rc == MDBX_NOTFOUND) { - m3->mc_flags |= C_EOF; - rc = MDBX_SUCCESS; - continue; - } else if (unlikely(rc != MDBX_SUCCESS)) - break; - } - if (m3->mc_ki[mc->mc_top] >= ki || m3->mc_pg[mc->mc_top] != mp) { - if ((mc->mc_db->md_flags & MDBX_DUPSORT) != 0 && - (m3->mc_flags & C_EOF) == 0) { - MDBX_node *node = - page_node(m3->mc_pg[m3->mc_top], m3->mc_ki[m3->mc_top]); - /* If this node has dupdata, it may need to be reinited - * because its data has moved. - * If the xcursor was not initd it must be reinited. - * Else if node points to a subDB, nothing is needed. */ - if (node_flags(node) & F_DUPDATA) { - if (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { - if (!(node_flags(node) & F_SUBDATA)) - m3->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); - } else { - rc = mdbx_xcursor_init1(m3, node); - if (unlikely(rc != MDBX_SUCCESS)) - break; - m3->mc_xcursor->mx_cursor.mc_flags |= C_DEL; - } - } - } - } - } - } - - if (mc->mc_ki[mc->mc_top] >= nkeys) { - rc = mdbx_cursor_sibling(mc, true); - if (rc == MDBX_NOTFOUND) { - mc->mc_flags |= C_EOF; - rc = MDBX_SUCCESS; - } - } - if ((mc->mc_db->md_flags & MDBX_DUPSORT) != 0 && - (mc->mc_flags & C_EOF) == 0) { - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - /* If this node has dupdata, it may need to be reinited - * because its data has moved. - * If the xcursor was not initd it must be reinited. - * Else if node points to a subDB, nothing is needed. */ - if (node_flags(node) & F_DUPDATA) { - if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { - if (!(node_flags(node) & F_SUBDATA)) - mc->mc_xcursor->mx_cursor.mc_pg[0] = node_data(node); - } else { - rc = mdbx_xcursor_init1(mc, node); - if (likely(rc != MDBX_SUCCESS)) - mc->mc_xcursor->mx_cursor.mc_flags |= C_DEL; - } - } - } - mc->mc_flags |= C_DEL; - } - - if (unlikely(rc)) - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - else if (mdbx_audit_enabled()) - rc = mdbx_cursor_check(mc, false); - - return rc; -} - -int mdbx_del(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data) { - int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!key)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) - return (txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; - - return mdbx_del0(txn, dbi, key, data, 0); -} - -static int mdbx_del0(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, - unsigned flags) { - MDBX_cursor_couple cx; - MDBX_cursor_op op; - MDBX_val rdata; - int rc, exact = 0; - DKBUF; - - mdbx_debug("====> delete db %u key [%s], data [%s]", dbi, DKEY(key), - DVAL(data)); - - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (data) { - op = MDBX_GET_BOTH; - rdata = *data; - data = &rdata; - } else { - op = MDBX_SET; - flags |= MDBX_NODUPDATA; - } - rc = mdbx_cursor_set(&cx.outer, key, data, op, &exact); - if (likely(rc == MDBX_SUCCESS)) { - /* let mdbx_page_split know about this cursor if needed: - * delete will trigger a rebalance; if it needs to move - * a node from one page to another, it will have to - * update the parent's separator key(s). If the new sepkey - * is larger than the current one, the parent page may - * run out of space, triggering a split. We need this - * cursor to be consistent until the end of the rebalance. */ - cx.outer.mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = &cx.outer; - rc = mdbx_cursor_del(&cx.outer, flags); - txn->mt_cursors[dbi] = cx.outer.mc_next; - } - return rc; -} - -/* Split a page and insert a new node. - * Set MDBX_TXN_ERROR on failure. - * [in,out] mc Cursor pointing to the page and desired insertion index. - * The cursor will be updated to point to the actual page and index where - * the node got inserted after the split. - * [in] newkey The key for the newly inserted node. - * [in] newdata The data for the newly inserted node. - * [in] newpgno The page number, if the new node is a branch node. - * [in] nflags The NODE_ADD_FLAGS for the new node. - * Returns 0 on success, non-zero on failure. */ -static int mdbx_page_split(MDBX_cursor *mc, const MDBX_val *newkey, - MDBX_val *newdata, pgno_t newpgno, unsigned nflags) { - unsigned flags; - int rc = MDBX_SUCCESS, foliage = 0, did_split = 0; - pgno_t pgno = 0; - unsigned i, ptop; - MDBX_env *env = mc->mc_txn->mt_env; - MDBX_val sepkey, rkey, xdata; - MDBX_page *copy = NULL; - MDBX_page *rp, *pp; - MDBX_cursor mn; - DKBUF; - - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - unsigned newindx = mc->mc_ki[mc->mc_top]; - unsigned nkeys = page_numkeys(mp); - if (mdbx_audit_enabled()) { - rc = mdbx_cursor_check(mc, true); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - mdbx_cassert(mc, - nkeys >= (unsigned)(IS_BRANCH(mp) ? MDBX_MINKEYS * 2 - 1 : 1)); - mdbx_debug("-----> splitting %s page %" PRIaPGNO - " and adding [%s] at index %i/%i", - IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno, DKEY(newkey), - mc->mc_ki[mc->mc_top], nkeys); - - /* Create a right sibling. */ - if ((rc = mdbx_page_new(mc, mp->mp_flags, 1, &rp))) - return rc; - rp->mp_leaf2_ksize = mp->mp_leaf2_ksize; - mdbx_debug("new right sibling: page %" PRIaPGNO, rp->mp_pgno); - - /* Usually when splitting the root page, the cursor - * height is 1. But when called from mdbx_update_key, - * the cursor height may be greater because it walks - * up the stack while finding the branch slot to update. */ - if (mc->mc_top < 1) { - if ((rc = mdbx_page_new(mc, P_BRANCH, 1, &pp))) - goto done; - /* shift current top to make room for new parent */ - mdbx_cassert(mc, mc->mc_snum < 2 && mc->mc_db->md_depth > 0); - mc->mc_pg[2] = mc->mc_pg[1]; - mc->mc_ki[2] = mc->mc_ki[1]; - mc->mc_pg[1] = mc->mc_pg[0]; - mc->mc_ki[1] = mc->mc_ki[0]; - mc->mc_pg[0] = pp; - mc->mc_ki[0] = 0; - mc->mc_db->md_root = pp->mp_pgno; - mdbx_debug("root split! new root = %" PRIaPGNO, pp->mp_pgno); - foliage = mc->mc_db->md_depth++; - - /* Add left (implicit) pointer. */ - if (unlikely((rc = mdbx_node_add_branch(mc, 0, NULL, mp->mp_pgno)) != - MDBX_SUCCESS)) { - /* undo the pre-push */ - mc->mc_pg[0] = mc->mc_pg[1]; - mc->mc_ki[0] = mc->mc_ki[1]; - mc->mc_db->md_root = mp->mp_pgno; - mc->mc_db->md_depth--; - goto done; - } - mc->mc_snum++; - mc->mc_top++; - ptop = 0; - } else { - ptop = mc->mc_top - 1; - mdbx_debug("parent branch page is %" PRIaPGNO, mc->mc_pg[ptop]->mp_pgno); - } - - mdbx_cursor_copy(mc, &mn); - mn.mc_xcursor = NULL; - mn.mc_pg[mn.mc_top] = rp; - mn.mc_ki[mn.mc_top] = 0; - mn.mc_ki[ptop] = mc->mc_ki[ptop] + 1; - - unsigned split_indx; - if (nflags & MDBX_APPEND) { - mn.mc_ki[mn.mc_top] = 0; - sepkey = *newkey; - split_indx = newindx; - nkeys = 0; - } else { - split_indx = (nkeys + 1) / 2; - if (IS_LEAF2(rp)) { - char *split, *ins; - unsigned lsize, rsize, ksize; - /* Move half of the keys to the right sibling */ - const int x = mc->mc_ki[mc->mc_top] - split_indx; - ksize = mc->mc_db->md_xsize; - split = page_leaf2key(mp, split_indx, ksize); - rsize = (nkeys - split_indx) * ksize; - lsize = (nkeys - split_indx) * sizeof(indx_t); - mdbx_cassert(mc, mp->mp_lower >= lsize); - mp->mp_lower -= (indx_t)lsize; - mdbx_cassert(mc, rp->mp_lower + lsize <= UINT16_MAX); - rp->mp_lower += (indx_t)lsize; - mdbx_cassert(mc, mp->mp_upper + rsize - lsize <= UINT16_MAX); - mp->mp_upper += (indx_t)(rsize - lsize); - mdbx_cassert(mc, rp->mp_upper >= rsize - lsize); - rp->mp_upper -= (indx_t)(rsize - lsize); - sepkey.iov_len = ksize; - if (newindx == split_indx) { - sepkey.iov_base = newkey->iov_base; - } else { - sepkey.iov_base = split; - } - if (x < 0) { - mdbx_cassert(mc, ksize >= sizeof(indx_t)); - ins = page_leaf2key(mp, mc->mc_ki[mc->mc_top], ksize); - memcpy(rp->mp_ptrs, split, rsize); - sepkey.iov_base = rp->mp_ptrs; - memmove(ins + ksize, ins, (split_indx - mc->mc_ki[mc->mc_top]) * ksize); - memcpy(ins, newkey->iov_base, ksize); - mdbx_cassert(mc, UINT16_MAX - mp->mp_lower >= (int)sizeof(indx_t)); - mp->mp_lower += sizeof(indx_t); - mdbx_cassert(mc, mp->mp_upper >= ksize - sizeof(indx_t)); - mp->mp_upper -= (indx_t)(ksize - sizeof(indx_t)); - } else { - memcpy(rp->mp_ptrs, split, x * ksize); - ins = page_leaf2key(rp, x, ksize); - memcpy(ins, newkey->iov_base, ksize); - memcpy(ins + ksize, split + x * ksize, rsize - x * ksize); - mdbx_cassert(mc, UINT16_MAX - rp->mp_lower >= (int)sizeof(indx_t)); - rp->mp_lower += sizeof(indx_t); - mdbx_cassert(mc, rp->mp_upper >= ksize - sizeof(indx_t)); - rp->mp_upper -= (indx_t)(ksize - sizeof(indx_t)); - mdbx_cassert(mc, x <= (int)UINT16_MAX); - mc->mc_ki[mc->mc_top] = (indx_t)x; - } - } else { - /* Maximum free space in an empty page */ - const unsigned pmax = page_space(env); - const size_t nsize = IS_LEAF(mp) ? leaf_size(env, newkey, newdata) - : branch_size(env, newkey); - - /* grab a page to hold a temporary copy */ - copy = mdbx_page_malloc(mc->mc_txn, 1); - if (unlikely(copy == NULL)) { - rc = MDBX_ENOMEM; - goto done; - } - copy->mp_pgno = mp->mp_pgno; - copy->mp_flags = mp->mp_flags; - copy->mp_txnid = INVALID_TXNID; - copy->mp_lower = 0; - copy->mp_upper = (indx_t)page_space(env); - - /* prepare to insert */ - for (unsigned j = i = 0; i < nkeys; i++) { - if (i == newindx) - copy->mp_ptrs[j++] = 0; - copy->mp_ptrs[j++] = mp->mp_ptrs[i]; - } - - /* When items are relatively large the split point needs - * to be checked, because being off-by-one will make the - * difference between success or failure in mdbx_node_add. - * - * It's also relevant if a page happens to be laid out - * such that one half of its nodes are all "small" and - * the other half of its nodes are "large." If the new - * item is also "large" and falls on the half with - * "large" nodes, it also may not fit. - * - * As a final tweak, if the new item goes on the last - * spot on the page (and thus, onto the new page), bias - * the split so the new page is emptier than the old page. - * This yields better packing during sequential inserts. */ - if (nkeys < 32 || nsize > pmax / 16 || newindx >= nkeys) { - /* Find split point */ - int dir; - size_t psize = 0; - unsigned k; - if (newindx <= split_indx || newindx >= nkeys) { - i = 0; - dir = 1; - k = (newindx >= nkeys) ? nkeys : split_indx + 1 + IS_LEAF(mp); - split_indx = k - 1; - } else { - i = nkeys; - dir = -1; - k = split_indx - 1; - split_indx += 1; - } - do { - if (i == newindx) { - psize += nsize; - } else { - MDBX_node *node = - (MDBX_node *)((char *)mp + copy->mp_ptrs[i] + PAGEHDRSZ); - psize += NODESIZE + node_ks(node) + sizeof(indx_t); - if (IS_LEAF(mp)) - psize += F_ISSET(node_flags(node), F_BIGDATA) ? sizeof(pgno_t) - : node_ds(node); - psize = EVEN(psize); - } - if (psize > pmax) { - split_indx = i + (dir < 0); - break; - } - i += dir; - } while (i != k); - } - - if (split_indx == newindx) { - sepkey.iov_len = newkey->iov_len; - sepkey.iov_base = newkey->iov_base; - } else { - MDBX_node *node = - (MDBX_node *)((char *)mp + copy->mp_ptrs[split_indx] + PAGEHDRSZ); - sepkey.iov_len = node_ks(node); - sepkey.iov_base = node_key(node); - } - } - } - - mdbx_debug("separator is %d [%s]", split_indx, DKEY(&sepkey)); - if (mdbx_audit_enabled()) { - rc = mdbx_cursor_check(mc, true); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - rc = mdbx_cursor_check(&mn, true); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - } - - /* Copy separator key to the parent. */ - if (page_room(mn.mc_pg[ptop]) < branch_size(env, &sepkey)) { - const int snum = mc->mc_snum; - const int depth = mc->mc_db->md_depth; - mn.mc_snum--; - mn.mc_top--; - did_split = 1; - /* We want other splits to find mn when doing fixups */ - WITH_CURSOR_TRACKING( - mn, rc = mdbx_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0)); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - mdbx_cassert(mc, mc->mc_snum - snum == mc->mc_db->md_depth - depth); - if (mdbx_audit_enabled()) { - rc = mdbx_cursor_check(mc, true); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - } - - /* root split? */ - ptop += mc->mc_snum - snum; - - /* Right page might now have changed parent. - * Check if left page also changed parent. */ - if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && - mc->mc_ki[ptop] >= page_numkeys(mc->mc_pg[ptop])) { - for (i = 0; i < ptop; i++) { - mc->mc_pg[i] = mn.mc_pg[i]; - mc->mc_ki[i] = mn.mc_ki[i]; - } - mc->mc_pg[ptop] = mn.mc_pg[ptop]; - if (mn.mc_ki[ptop]) { - mc->mc_ki[ptop] = mn.mc_ki[ptop] - 1; - } else { - /* find right page's left sibling */ - mc->mc_ki[ptop] = mn.mc_ki[ptop]; - rc = mdbx_cursor_sibling(mc, false); - } - } - } else { - mn.mc_top--; - rc = mdbx_node_add_branch(&mn, mn.mc_ki[ptop], &sepkey, rp->mp_pgno); - mn.mc_top++; - } - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc == MDBX_NOTFOUND) /* improper mdbx_cursor_sibling() result */ { - mdbx_error("unexpected %s", "MDBX_NOTFOUND"); - rc = MDBX_PROBLEM; - } - goto done; - } - - if (nflags & MDBX_APPEND) { - mc->mc_pg[mc->mc_top] = rp; - mc->mc_ki[mc->mc_top] = 0; - switch (PAGETYPE(rp)) { - case P_BRANCH: { - mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0); - mdbx_cassert(mc, newpgno != 0 && newpgno != P_INVALID); - rc = mdbx_node_add_branch(mc, 0, newkey, newpgno); - } break; - case P_LEAF: { - mdbx_cassert(mc, newpgno == 0 || newpgno == P_INVALID); - rc = mdbx_node_add_leaf(mc, 0, newkey, newdata, nflags); - } break; - case P_LEAF | P_LEAF2: { - mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0); - mdbx_cassert(mc, newpgno == 0 || newpgno == P_INVALID); - rc = mdbx_node_add_leaf2(mc, 0, newkey); - } break; - default: - rc = MDBX_CORRUPTED; - } - if (rc) - goto done; - for (i = 0; i < mc->mc_top; i++) - mc->mc_ki[i] = mn.mc_ki[i]; - } else if (!IS_LEAF2(mp)) { - /* Move nodes */ - mc->mc_pg[mc->mc_top] = rp; - i = split_indx; - indx_t n = 0; - do { - MDBX_val *rdata = NULL; - if (i == newindx) { - rkey.iov_base = newkey->iov_base; - rkey.iov_len = newkey->iov_len; - if (IS_LEAF(mp)) { - rdata = newdata; - } else - pgno = newpgno; - flags = nflags; - /* Update index for the new key. */ - mc->mc_ki[mc->mc_top] = n; - } else { - MDBX_node *node = - (MDBX_node *)((char *)mp + copy->mp_ptrs[i] + PAGEHDRSZ); - rkey.iov_base = node_key(node); - rkey.iov_len = node_ks(node); - if (IS_LEAF(mp)) { - xdata.iov_base = node_data(node); - xdata.iov_len = node_ds(node); - rdata = &xdata; - } else - pgno = node_pgno(node); - flags = node_flags(node); - } - - switch (PAGETYPE(rp)) { - case P_BRANCH: { - mdbx_cassert(mc, 0 == (uint16_t)flags); - if (n == 0) { - /* First branch index doesn't need key data. */ - rkey.iov_len = 0; - } - rc = mdbx_node_add_branch(mc, n, &rkey, pgno); - } break; - case P_LEAF: { - mdbx_cassert(mc, pgno == 0); - mdbx_cassert(mc, rdata != NULL); - rc = mdbx_node_add_leaf(mc, n, &rkey, rdata, flags); - } break; - /* case P_LEAF | P_LEAF2: { - mdbx_cassert(mc, (nflags & (F_BIGDATA | F_SUBDATA | F_DUPDATA)) == 0); - mdbx_cassert(mc, gno == 0); - rc = mdbx_node_add_leaf2(mc, n, &rkey); - } break; */ - default: - rc = MDBX_CORRUPTED; - } - if (rc) - goto done; - - if (i == nkeys) { - i = 0; - n = 0; - mc->mc_pg[mc->mc_top] = copy; - } else { - i++; - n++; - } - } while (i != split_indx); - - nkeys = page_numkeys(copy); - for (i = 0; i < nkeys; i++) - mp->mp_ptrs[i] = copy->mp_ptrs[i]; - mp->mp_lower = copy->mp_lower; - mp->mp_upper = copy->mp_upper; - memcpy(page_node(mp, nkeys - 1), page_node(copy, nkeys - 1), - env->me_psize - copy->mp_upper - PAGEHDRSZ); - - /* reset back to original page */ - if (newindx < split_indx) { - mc->mc_pg[mc->mc_top] = mp; - } else { - mc->mc_pg[mc->mc_top] = rp; - mc->mc_ki[ptop]++; - /* Make sure mc_ki is still valid. */ - if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && - mc->mc_ki[ptop] >= page_numkeys(mc->mc_pg[ptop])) { - for (i = 0; i <= ptop; i++) { - mc->mc_pg[i] = mn.mc_pg[i]; - mc->mc_ki[i] = mn.mc_ki[i]; - } - } - } - if (nflags & MDBX_RESERVE) { - MDBX_node *node = page_node(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (!(node_flags(node) & F_BIGDATA)) - newdata->iov_base = node_data(node); - } - } else { - if (newindx >= split_indx) { - mc->mc_pg[mc->mc_top] = rp; - mc->mc_ki[ptop]++; - /* Make sure mc_ki is still valid. */ - if (mn.mc_pg[ptop] != mc->mc_pg[ptop] && - mc->mc_ki[ptop] >= page_numkeys(mc->mc_pg[ptop])) { - for (i = 0; i <= ptop; i++) { - mc->mc_pg[i] = mn.mc_pg[i]; - mc->mc_ki[i] = mn.mc_ki[i]; - } - } - } - } - - { - /* Adjust other cursors pointing to mp */ - MDBX_cursor *m2, *m3; - MDBX_dbi dbi = mc->mc_dbi; - nkeys = page_numkeys(mp); - - for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) { - m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (m3 == mc) - continue; - if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED)) - continue; - if (foliage) { - int k; - /* sub cursors may be on different DB */ - if (m3->mc_pg[0] != mp) - continue; - /* root split */ - for (k = foliage; k >= 0; k--) { - m3->mc_ki[k + 1] = m3->mc_ki[k]; - m3->mc_pg[k + 1] = m3->mc_pg[k]; - } - m3->mc_ki[0] = (m3->mc_ki[0] >= nkeys) ? 1 : 0; - m3->mc_pg[0] = mc->mc_pg[0]; - m3->mc_snum++; - m3->mc_top++; - } - if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) { - if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDBX_SPLIT_REPLACE)) - m3->mc_ki[mc->mc_top]++; - if (m3->mc_ki[mc->mc_top] >= nkeys) { - m3->mc_pg[mc->mc_top] = rp; - mdbx_cassert(mc, m3->mc_ki[mc->mc_top] >= nkeys); - m3->mc_ki[mc->mc_top] -= (indx_t)nkeys; - for (i = 0; i < mc->mc_top; i++) { - m3->mc_ki[i] = mn.mc_ki[i]; - m3->mc_pg[i] = mn.mc_pg[i]; - } - } - } else if (!did_split && m3->mc_top >= ptop && - m3->mc_pg[ptop] == mc->mc_pg[ptop] && - m3->mc_ki[ptop] >= mc->mc_ki[ptop]) { - m3->mc_ki[ptop]++; - } - if (XCURSOR_INITED(m3) && IS_LEAF(mp)) - XCURSOR_REFRESH(m3, m3->mc_pg[mc->mc_top], m3->mc_ki[mc->mc_top]); - } - } - mdbx_debug("mp left: %d, rp left: %d", page_room(mp), page_room(rp)); - -done: - if (copy) /* tmp page */ - mdbx_dpage_free(env, copy, 1); - if (unlikely(rc)) - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return rc; -} - -int mdbx_put(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, - unsigned flags) { - int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!key || !data)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(flags & ~(MDBX_NOOVERWRITE | MDBX_NODUPDATA | MDBX_RESERVE | - MDBX_APPEND | MDBX_APPENDDUP | MDBX_CURRENT))) - return MDBX_EINVAL; - - if (unlikely(txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) - return (txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; - - MDBX_cursor_couple cx; - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - cx.outer.mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = &cx.outer; - - /* LY: support for update (explicit overwrite) */ - if (flags & MDBX_CURRENT) { - rc = mdbx_cursor_get(&cx.outer, key, NULL, MDBX_SET); - if (likely(rc == MDBX_SUCCESS) && - (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT)) { - /* LY: allows update (explicit overwrite) only for unique keys */ - MDBX_node *node = page_node(cx.outer.mc_pg[cx.outer.mc_top], - cx.outer.mc_ki[cx.outer.mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - mdbx_tassert(txn, XCURSOR_INITED(&cx.outer) && - cx.outer.mc_xcursor->mx_db.md_entries > 1); - rc = MDBX_EMULTIVAL; - } - } - } - - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_cursor_put(&cx.outer, key, data, flags); - txn->mt_cursors[dbi] = cx.outer.mc_next; - - return rc; -} - -/**** COPYING *****************************************************************/ - -#ifndef MDBX_WBUF -#define MDBX_WBUF ((size_t)1024 * 1024) -#endif -#define MDBX_EOF 0x10 /* mdbx_env_copyfd1() is done reading */ - -/* State needed for a double-buffering compacting copy. */ -typedef struct mdbx_copy { - MDBX_env *mc_env; - MDBX_txn *mc_txn; - mdbx_condmutex_t mc_condmutex; - uint8_t *mc_wbuf[2]; - uint8_t *mc_over[2]; - size_t mc_wlen[2]; - size_t mc_olen[2]; - mdbx_filehandle_t mc_fd; - volatile int mc_error; - pgno_t mc_next_pgno; - short mc_toggle; /* Buffer number in provider */ - short mc_new; /* (0-2 buffers to write) | (MDBX_EOF at end) */ - /* Error code. Never cleared if set. Both threads can set nonzero - * to fail the copy. Not mutex-protected, MDBX expects atomic int. */ -} mdbx_copy; - -/* Dedicated writer thread for compacting copy. */ -static THREAD_RESULT __cold THREAD_CALL mdbx_env_copythr(void *arg) { - mdbx_copy *my = arg; - uint8_t *ptr; - int toggle = 0; - - mdbx_condmutex_lock(&my->mc_condmutex); - while (!my->mc_error) { - while (!my->mc_new && !my->mc_error) { - int err = mdbx_condmutex_wait(&my->mc_condmutex); - if (err != MDBX_SUCCESS) { - my->mc_error = err; - goto bailout; - } - } - if (my->mc_new == 0 + MDBX_EOF) /* 0 buffers, just EOF */ - break; - size_t wsize = my->mc_wlen[toggle]; - ptr = my->mc_wbuf[toggle]; - again: - if (wsize > 0 && !my->mc_error) { - int err = mdbx_write(my->mc_fd, ptr, wsize); - if (err != MDBX_SUCCESS) { - my->mc_error = err; - goto bailout; - } - } - - /* If there's an overflow page tail, write it too */ - if (my->mc_olen[toggle]) { - wsize = my->mc_olen[toggle]; - ptr = my->mc_over[toggle]; - my->mc_olen[toggle] = 0; - goto again; - } - my->mc_wlen[toggle] = 0; - toggle ^= 1; - /* Return the empty buffer to provider */ - my->mc_new--; - mdbx_condmutex_signal(&my->mc_condmutex); - } -bailout: - mdbx_condmutex_unlock(&my->mc_condmutex); - return (THREAD_RESULT)0; -} - -/* Give buffer and/or MDBX_EOF to writer thread, await unused buffer. - * - * [in] my control structure. - * [in] adjust (1 to hand off 1 buffer) | (MDBX_EOF when ending). */ -static int __cold mdbx_env_cthr_toggle(mdbx_copy *my, int adjust) { - mdbx_condmutex_lock(&my->mc_condmutex); - my->mc_new += (short)adjust; - mdbx_condmutex_signal(&my->mc_condmutex); - while (!my->mc_error && (my->mc_new & 2) /* both buffers in use */) { - int err = mdbx_condmutex_wait(&my->mc_condmutex); - if (err != MDBX_SUCCESS) - my->mc_error = err; - } - mdbx_condmutex_unlock(&my->mc_condmutex); - - my->mc_toggle ^= (adjust & 1); - /* Both threads reset mc_wlen, to be safe from threading errors */ - my->mc_wlen[my->mc_toggle] = 0; - return my->mc_error; -} - -/* Depth-first tree traversal for compacting copy. - * [in] my control structure. - * [in,out] pg database root. - * [in] flags includes F_DUPDATA if it is a sorted-duplicate sub-DB. */ -static int __cold mdbx_env_cwalk(mdbx_copy *my, pgno_t *pg, int flags) { - MDBX_cursor mc; - MDBX_page *mo, *mp, *leaf; - char *buf, *ptr; - int rc, toggle; - unsigned i; - - /* Empty DB, nothing to do */ - if (*pg == P_INVALID) - return MDBX_SUCCESS; - - memset(&mc, 0, sizeof(mc)); - mc.mc_snum = 1; - mc.mc_txn = my->mc_txn; - - rc = mdbx_page_get(&mc, *pg, &mc.mc_pg[0], NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_page_search_root(&mc, NULL, MDBX_PS_FIRST); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - /* Make cursor pages writable */ - buf = ptr = mdbx_malloc(pgno2bytes(my->mc_env, mc.mc_snum)); - if (buf == NULL) - return MDBX_ENOMEM; - - for (i = 0; i < mc.mc_top; i++) { - mdbx_page_copy((MDBX_page *)ptr, mc.mc_pg[i], my->mc_env->me_psize); - mc.mc_pg[i] = (MDBX_page *)ptr; - ptr += my->mc_env->me_psize; - } - - /* This is writable space for a leaf page. Usually not needed. */ - leaf = (MDBX_page *)ptr; - - toggle = my->mc_toggle; - while (mc.mc_snum > 0) { - unsigned n; - mp = mc.mc_pg[mc.mc_top]; - n = page_numkeys(mp); - - if (IS_LEAF(mp)) { - if (!IS_LEAF2(mp) && !(flags & F_DUPDATA)) { - for (i = 0; i < n; i++) { - MDBX_node *node = page_node(mp, i); - if (node_flags(node) & F_BIGDATA) { - MDBX_page *omp; - - /* Need writable leaf */ - if (mp != leaf) { - mc.mc_pg[mc.mc_top] = leaf; - mdbx_page_copy(leaf, mp, my->mc_env->me_psize); - mp = leaf; - node = page_node(mp, i); - } - - const pgno_t pgno = node_largedata_pgno(node); - poke_pgno(node_data(node), my->mc_next_pgno); - rc = mdbx_page_get(&mc, pgno, &omp, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - if (my->mc_wlen[toggle] >= MDBX_WBUF) { - rc = mdbx_env_cthr_toggle(my, 1); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - toggle = my->mc_toggle; - } - mo = (MDBX_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); - memcpy(mo, omp, my->mc_env->me_psize); - mo->mp_pgno = my->mc_next_pgno; - mo->mp_txnid = MIN_TXNID; - my->mc_next_pgno += omp->mp_pages; - my->mc_wlen[toggle] += my->mc_env->me_psize; - if (omp->mp_pages > 1) { - my->mc_olen[toggle] = pgno2bytes(my->mc_env, omp->mp_pages - 1); - my->mc_over[toggle] = (uint8_t *)omp + my->mc_env->me_psize; - rc = mdbx_env_cthr_toggle(my, 1); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - toggle = my->mc_toggle; - } - } else if (node_flags(node) & F_SUBDATA) { - if (node_ds(node) < sizeof(MDBX_db)) { - rc = MDBX_CORRUPTED; - goto done; - } - - /* Need writable leaf */ - if (mp != leaf) { - mc.mc_pg[mc.mc_top] = leaf; - mdbx_page_copy(leaf, mp, my->mc_env->me_psize); - mp = leaf; - node = page_node(mp, i); - } - - MDBX_db db; - memcpy(&db, node_data(node), sizeof(MDBX_db)); - my->mc_toggle = (short)toggle; - rc = mdbx_env_cwalk(my, &db.md_root, node_flags(node) & F_DUPDATA); - if (rc) - goto done; - toggle = my->mc_toggle; - memcpy(node_data(node), &db, sizeof(MDBX_db)); - } - } - } - } else { - mc.mc_ki[mc.mc_top]++; - if (mc.mc_ki[mc.mc_top] < n) { - again: - rc = mdbx_page_get(&mc, node_pgno(page_node(mp, mc.mc_ki[mc.mc_top])), - &mp, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - mc.mc_top++; - mc.mc_snum++; - mc.mc_ki[mc.mc_top] = 0; - if (IS_BRANCH(mp)) { - /* Whenever we advance to a sibling branch page, - * we must proceed all the way down to its first leaf. */ - mdbx_page_copy(mc.mc_pg[mc.mc_top], mp, my->mc_env->me_psize); - goto again; - } else - mc.mc_pg[mc.mc_top] = mp; - continue; - } - } - if (my->mc_wlen[toggle] >= MDBX_WBUF) { - rc = mdbx_env_cthr_toggle(my, 1); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - toggle = my->mc_toggle; - } - mo = (MDBX_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); - mdbx_page_copy(mo, mp, my->mc_env->me_psize); - mo->mp_txnid = MIN_TXNID; - mo->mp_pgno = my->mc_next_pgno++; - my->mc_wlen[toggle] += my->mc_env->me_psize; - if (mc.mc_top) { - /* Update parent if there is one */ - node_set_pgno(page_node(mc.mc_pg[mc.mc_top - 1], mc.mc_ki[mc.mc_top - 1]), - mo->mp_pgno); - mdbx_cursor_pop(&mc); - } else { - /* Otherwise we're done */ - *pg = mo->mp_pgno; - break; - } - } -done: - mdbx_free(buf); - return rc; -} - -static __cold void compact_fixup_meta(MDBX_env *env, MDBX_meta *meta) { - /* Calculate filesize taking in account shrink/growing thresholds */ - if (meta->mm_geo.next > meta->mm_geo.now) { - const pgno_t aligned = pgno_align2os_pgno( - env, - pgno_add(meta->mm_geo.next, - meta->mm_geo.grow - meta->mm_geo.next % meta->mm_geo.grow)); - meta->mm_geo.now = aligned; - } else if (meta->mm_geo.next < meta->mm_geo.now) { - meta->mm_geo.now = meta->mm_geo.next; - const pgno_t aligner = - meta->mm_geo.grow ? meta->mm_geo.grow : meta->mm_geo.shrink; - const pgno_t aligned = pgno_align2os_pgno( - env, meta->mm_geo.next + aligner - meta->mm_geo.next % aligner); - meta->mm_geo.now = aligned; - } - - if (meta->mm_geo.now < meta->mm_geo.lower) - meta->mm_geo.now = meta->mm_geo.lower; - if (meta->mm_geo.now > meta->mm_geo.upper) - meta->mm_geo.now = meta->mm_geo.upper; - - /* Update signature */ - assert(meta->mm_geo.now >= meta->mm_geo.next); - meta->mm_datasync_sign = mdbx_meta_sign(meta); -} - -/* Copy environment with compaction. */ -static int __cold mdbx_env_compact(MDBX_env *env, MDBX_txn *read_txn, - mdbx_filehandle_t fd, uint8_t *buffer, - const bool dest_is_pipe) { - const size_t meta_bytes = pgno2bytes(env, NUM_METAS); - uint8_t *const data_buffer = - buffer + roundup_powerof2(meta_bytes, env->me_os_psize); - MDBX_meta *const meta = mdbx_init_metas(env, buffer); - /* copy canary sequenses if present */ - if (read_txn->mt_canary.v) { - meta->mm_canary = read_txn->mt_canary; - meta->mm_canary.v = mdbx_meta_txnid_stable(env, meta); - } - - /* Set metapage 1 with current main DB */ - pgno_t new_root, root = read_txn->mt_dbs[MAIN_DBI].md_root; - if ((new_root = root) == P_INVALID) { - /* When the DB is empty, handle it specially to - * fix any breakage like page leaks from ITS#8174. */ - meta->mm_dbs[MAIN_DBI].md_flags = read_txn->mt_dbs[MAIN_DBI].md_flags; - compact_fixup_meta(env, meta); - if (dest_is_pipe) { - int rc = mdbx_write(fd, buffer, meta_bytes); - if (rc != MDBX_SUCCESS) - return rc; - } - } else { - /* Count free pages + GC pages. Subtract from last_pg - * to find the new last_pg, which also becomes the new root. */ - pgno_t freecount = 0; - MDBX_cursor mc; - MDBX_val key, data; - - int rc = mdbx_cursor_init(&mc, read_txn, FREE_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - while ((rc = mdbx_cursor_get(&mc, &key, &data, MDBX_NEXT)) == 0) - freecount += *(pgno_t *)data.iov_base; - if (unlikely(rc != MDBX_NOTFOUND)) - return rc; - - freecount += read_txn->mt_dbs[FREE_DBI].md_branch_pages + - read_txn->mt_dbs[FREE_DBI].md_leaf_pages + - read_txn->mt_dbs[FREE_DBI].md_overflow_pages; - - new_root = read_txn->mt_next_pgno - 1 - freecount; - meta->mm_geo.next = new_root + 1; - meta->mm_dbs[MAIN_DBI] = read_txn->mt_dbs[MAIN_DBI]; - meta->mm_dbs[MAIN_DBI].md_root = new_root; - - mdbx_copy ctx; - memset(&ctx, 0, sizeof(ctx)); - rc = mdbx_condmutex_init(&ctx.mc_condmutex); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - memset(data_buffer, 0, MDBX_WBUF * 2); - ctx.mc_wbuf[0] = data_buffer; - ctx.mc_wbuf[1] = data_buffer + MDBX_WBUF; - ctx.mc_next_pgno = NUM_METAS; - ctx.mc_env = env; - ctx.mc_fd = fd; - ctx.mc_txn = read_txn; - - mdbx_thread_t thread; - int thread_err = mdbx_thread_create(&thread, mdbx_env_copythr, &ctx); - if (likely(thread_err == MDBX_SUCCESS)) { - if (dest_is_pipe) { - compact_fixup_meta(env, meta); - rc = mdbx_write(fd, buffer, meta_bytes); - } - if (rc == MDBX_SUCCESS) - rc = mdbx_env_cwalk(&ctx, &root, 0); - mdbx_env_cthr_toggle(&ctx, 1 | MDBX_EOF); - thread_err = mdbx_thread_join(thread); - mdbx_condmutex_destroy(&ctx.mc_condmutex); - } - if (unlikely(thread_err != MDBX_SUCCESS)) - return thread_err; - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if (unlikely(ctx.mc_error != MDBX_SUCCESS)) - return ctx.mc_error; - - if (dest_is_pipe) { - if (root != new_root) { - mdbx_error("post-compactification root %" PRIaPGNO - " NE expected %" PRIaPGNO - " (source DB corrupted or has a page leak(s))", - root, new_root); - return MDBX_CORRUPTED; /* page leak or corrupt DB */ - } - } else { - if (root > new_root) { - mdbx_error("post-compactification root %" PRIaPGNO - " GT expected %" PRIaPGNO " (source DB corrupted)", - root, new_root); - return MDBX_CORRUPTED; /* page leak or corrupt DB */ - } - if (root < new_root) { - mdbx_notice("post-compactification root %" PRIaPGNO - " LT expected %" PRIaPGNO " (page leak(s) in source DB)", - root, new_root); - /* fixup meta */ - meta->mm_dbs[MAIN_DBI].md_root = root; - meta->mm_geo.next = root + 1; - } - compact_fixup_meta(env, meta); - } - } - - /* Extend file if required */ - if (meta->mm_geo.now != meta->mm_geo.next) { - const size_t whole_size = pgno2bytes(env, meta->mm_geo.now); - if (!dest_is_pipe) - return mdbx_ftruncate(fd, whole_size); - - const size_t used_size = pgno2bytes(env, meta->mm_geo.next); - memset(data_buffer, 0, MDBX_WBUF); - for (size_t offset = used_size; offset < whole_size;) { - const size_t chunk = - (MDBX_WBUF < whole_size - offset) ? MDBX_WBUF : whole_size - offset; - /* copy to avoit EFAULT in case swapped-out */ - int rc = mdbx_write(fd, data_buffer, chunk); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - offset += chunk; - } - } - return MDBX_SUCCESS; -} - -/* Copy environment as-is. */ -static int __cold mdbx_env_copy_asis(MDBX_env *env, MDBX_txn *read_txn, - mdbx_filehandle_t fd, uint8_t *buffer, - const bool dest_is_pipe) { - /* We must start the actual read txn after blocking writers */ - int rc = mdbx_txn_end(read_txn, MDBX_END_RESET_TMP); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - /* Temporarily block writers until we snapshot the meta pages */ - rc = mdbx_txn_lock(env, false); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - rc = mdbx_txn_renew0(read_txn, MDBX_RDONLY); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_txn_unlock(env); - return rc; - } - - mdbx_jitter4testing(false); - const size_t meta_bytes = pgno2bytes(env, NUM_METAS); - /* Make a snapshot of meta-pages, - * but writing ones after the data was flushed */ - memcpy(buffer, env->me_map, meta_bytes); - MDBX_meta *const headcopy = /* LY: get pointer to the spanshot copy */ - (MDBX_meta *)(buffer + ((uint8_t *)mdbx_meta_head(env) - env->me_map)); - /* Update signature to steady */ - headcopy->mm_datasync_sign = mdbx_meta_sign(headcopy); - mdbx_txn_unlock(env); - - /* Copy the data */ - const size_t whole_size = pgno_align2os_bytes(env, read_txn->mt_end_pgno); - const size_t used_size = pgno2bytes(env, read_txn->mt_next_pgno); - mdbx_jitter4testing(false); - - if (dest_is_pipe) - rc = mdbx_write(fd, buffer, meta_bytes); - - uint8_t *const data_buffer = - buffer + roundup_powerof2(meta_bytes, env->me_os_psize); - for (size_t offset = meta_bytes; rc == MDBX_SUCCESS && offset < used_size;) { - if (dest_is_pipe) { -#if defined(__linux__) || defined(__gnu_linux__) && !defined(MDBX_SAFE4QEMU) - off_t in_offset = offset; - const intptr_t written = - sendfile(fd, env->me_lazy_fd, &in_offset, used_size - offset); - if (unlikely(written <= 0)) { - rc = written ? errno : MDBX_ENODATA; - break; - } - offset = in_offset; - continue; -#endif - } else { -#if __GLIBC_PREREQ(2, 27) && defined(_GNU_SOURCE) && !defined(MDBX_SAFE4QEMU) - off_t in_offset = offset, out_offset = offset; - ssize_t bytes_copied = copy_file_range( - env->me_lazy_fd, &in_offset, fd, &out_offset, used_size - offset, 0); - if (unlikely(bytes_copied <= 0)) { - rc = bytes_copied ? errno : MDBX_ENODATA; - break; - } - offset = in_offset; - continue; -#endif - } - - /* fallback to portable */ - const size_t chunk = - (MDBX_WBUF < used_size - offset) ? MDBX_WBUF : used_size - offset; - /* copy to avoit EFAULT in case swapped-out */ - memcpy(data_buffer, env->me_map + offset, chunk); - rc = mdbx_write(fd, data_buffer, chunk); - offset += chunk; - } - - /* Extend file if required */ - if (likely(rc == MDBX_SUCCESS) && whole_size != used_size) { - if (!dest_is_pipe) - rc = mdbx_ftruncate(fd, whole_size); - else { - memset(data_buffer, 0, MDBX_WBUF); - for (size_t offset = used_size; - rc == MDBX_SUCCESS && offset < whole_size;) { - const size_t chunk = - (MDBX_WBUF < whole_size - offset) ? MDBX_WBUF : whole_size - offset; - /* copy to avoit EFAULT in case swapped-out */ - rc = mdbx_write(fd, data_buffer, chunk); - offset += chunk; - } - } - } - - return rc; -} - -int __cold mdbx_env_copy2fd(MDBX_env *env, mdbx_filehandle_t fd, - unsigned flags) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - const int dest_is_pipe = mdbx_is_pipe(fd); - if (MDBX_IS_ERROR(dest_is_pipe)) - return dest_is_pipe; - - if (!dest_is_pipe) { - int rc = mdbx_fseek(fd, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - const size_t buffer_size = - pgno_align2os_bytes(env, NUM_METAS) + - roundup_powerof2(((flags & MDBX_CP_COMPACT) ? MDBX_WBUF * 2 : MDBX_WBUF), - env->me_os_psize); - - uint8_t *buffer = NULL; - int rc = mdbx_memalign_alloc(env->me_os_psize, buffer_size, (void **)&buffer); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - MDBX_txn *read_txn = NULL; - /* Do the lock/unlock of the reader mutex before starting the - * write txn. Otherwise other read txns could block writers. */ - rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &read_txn); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_memalign_free(buffer); - return rc; - } - - if (!dest_is_pipe) { - /* Firstly write a stub to meta-pages. - * Now we sure to incomplete copy will not be used. */ - memset(buffer, -1, pgno2bytes(env, NUM_METAS)); - rc = mdbx_write(fd, buffer, pgno2bytes(env, NUM_METAS)); - } - - if (likely(rc == MDBX_SUCCESS)) { - memset(buffer, 0, pgno2bytes(env, NUM_METAS)); - rc = (flags & MDBX_CP_COMPACT) - ? mdbx_env_compact(env, read_txn, fd, buffer, dest_is_pipe) - : mdbx_env_copy_asis(env, read_txn, fd, buffer, dest_is_pipe); - } - mdbx_txn_abort(read_txn); - - if (!dest_is_pipe) { - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_filesync(fd, MDBX_SYNC_DATA | MDBX_SYNC_SIZE); - - /* Write actual meta */ - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_pwrite(fd, buffer, pgno2bytes(env, NUM_METAS), 0); - - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_filesync(fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - } - - mdbx_memalign_free(buffer); - return rc; -} - -int __cold mdbx_env_copy(MDBX_env *env, const char *dest_path, unsigned flags) { - if (unlikely(!env || !dest_path)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - /* The destination path must exist, but the destination file must not. - * We don't want the OS to cache the writes, since the source data is - * already in the OS cache. */ - mdbx_filehandle_t newfd; - int rc = mdbx_openfile(MDBX_OPEN_COPY, env, dest_path, &newfd, -#if defined(_WIN32) || defined(_WIN64) - (mode_t)-1 -#else - S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP -#endif - ); - if (rc == MDBX_SUCCESS) - rc = mdbx_env_copy2fd(env, newfd, flags); - - if (newfd != INVALID_HANDLE_VALUE) { - int err = mdbx_closefile(newfd); - if (rc == MDBX_SUCCESS && err != rc) - rc = err; - if (rc != MDBX_SUCCESS) - (void)mdbx_removefile(dest_path); - } - - return rc; -} - -/******************************************************************************/ - -int __cold mdbx_env_set_flags(MDBX_env *env, unsigned flags, int onoff) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(flags & ~CHANGEABLE)) - return MDBX_EPERM; - - if (unlikely(env->me_flags & MDBX_RDONLY)) - return MDBX_EACCESS; - - if (unlikely(env->me_txn0->mt_owner == mdbx_thread_self())) - return MDBX_BUSY; - - int rc = mdbx_txn_lock(env, false); - if (unlikely(rc)) - return rc; - - if (onoff) - env->me_flags |= flags; - else - env->me_flags &= ~flags; - - mdbx_txn_unlock(env); - return MDBX_SUCCESS; -} - -int __cold mdbx_env_get_flags(MDBX_env *env, unsigned *arg) { - if (unlikely(!env || !arg)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - *arg = env->me_flags & (CHANGEABLE | CHANGELESS); - return MDBX_SUCCESS; -} - -int __cold mdbx_env_set_userctx(MDBX_env *env, void *ctx) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - env->me_userctx = ctx; - return MDBX_SUCCESS; -} - -void *__cold mdbx_env_get_userctx(MDBX_env *env) { - return env ? env->me_userctx : NULL; -} - -int __cold mdbx_env_set_assert(MDBX_env *env, MDBX_assert_func *func) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_DEBUG - env->me_assert_func = func; - return MDBX_SUCCESS; -#else - (void)func; - return MDBX_ENOSYS; -#endif -} - -int __cold mdbx_env_get_path(MDBX_env *env, const char **arg) { - if (unlikely(!env || !arg)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - *arg = env->me_path; - return MDBX_SUCCESS; -} - -int __cold mdbx_env_get_fd(MDBX_env *env, mdbx_filehandle_t *arg) { - if (unlikely(!env || !arg)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - *arg = env->me_lazy_fd; - return MDBX_SUCCESS; -} - -/* Common code for mdbx_dbi_stat() and mdbx_env_stat(). - * [in] env the environment to operate in. - * [in] db the MDBX_db record containing the stats to return. - * [out] arg the address of an MDBX_stat structure to receive the stats. - * Returns 0, this function always succeeds. */ -static void mdbx_stat0(const MDBX_env *env, const MDBX_db *db, MDBX_stat *dest, - size_t bytes) { - dest->ms_psize = env->me_psize; - dest->ms_depth = db->md_depth; - dest->ms_branch_pages = db->md_branch_pages; - dest->ms_leaf_pages = db->md_leaf_pages; - dest->ms_overflow_pages = db->md_overflow_pages; - dest->ms_entries = db->md_entries; - if (likely(bytes >= - offsetof(MDBX_stat, ms_mod_txnid) + sizeof(dest->ms_mod_txnid))) - dest->ms_mod_txnid = db->md_mod_txnid; -} - -int __cold mdbx_env_stat(MDBX_env *env, MDBX_stat *dest, size_t bytes) { - return mdbx_env_stat_ex(env, NULL, dest, bytes); -} - -int __cold mdbx_env_stat_ex(const MDBX_env *env, const MDBX_txn *txn, - MDBX_stat *dest, size_t bytes) { - if (unlikely((env == NULL && txn == NULL) || dest == NULL)) - return MDBX_EINVAL; - - if (txn) { - int err = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - if (env) { - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - if (txn && unlikely(txn->mt_env != env)) - return MDBX_EINVAL; - } - - const size_t size_before_modtxnid = offsetof(MDBX_stat, ms_mod_txnid); - if (unlikely(bytes != sizeof(MDBX_stat)) && bytes != size_before_modtxnid) - return MDBX_EINVAL; - - if (txn) { - mdbx_stat0(txn->mt_env, &txn->mt_dbs[MAIN_DBI], dest, bytes); - return MDBX_SUCCESS; - } - - while (1) { - const MDBX_meta *const recent_meta = mdbx_meta_head(env); - const txnid_t txnid = mdbx_meta_txnid_fluid(env, recent_meta); - mdbx_stat0(env, &recent_meta->mm_dbs[MAIN_DBI], dest, bytes); - mdbx_compiler_barrier(); - if (likely(txnid == mdbx_meta_txnid_fluid(env, recent_meta) && - recent_meta == mdbx_meta_head(env))) - return MDBX_SUCCESS; - } -} - -int __cold mdbx_env_info(MDBX_env *env, MDBX_envinfo *arg, size_t bytes) { - return mdbx_env_info_ex(env, NULL, arg, bytes); -} - -int __cold mdbx_env_info_ex(const MDBX_env *env, const MDBX_txn *txn, - MDBX_envinfo *arg, size_t bytes) { - if (unlikely((env == NULL && txn == NULL) || arg == NULL)) - return MDBX_EINVAL; - - if (txn) { - int err = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - if (env) { - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - if (txn && unlikely(txn->mt_env != env)) - return MDBX_EINVAL; - } else { - env = txn->mt_env; - } - - const size_t size_before_bootid = offsetof(MDBX_envinfo, mi_bootid); - if (unlikely(bytes != sizeof(MDBX_envinfo)) && bytes != size_before_bootid) - return MDBX_EINVAL; - - const MDBX_meta *const meta0 = METAPAGE(env, 0); - const MDBX_meta *const meta1 = METAPAGE(env, 1); - const MDBX_meta *const meta2 = METAPAGE(env, 2); - pgno_t unsynced_pages; - while (1) { - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) - return MDBX_PANIC; - - const MDBX_meta *const recent_meta = mdbx_meta_head(env); - arg->mi_recent_txnid = mdbx_meta_txnid_fluid(env, recent_meta); - arg->mi_meta0_txnid = mdbx_meta_txnid_fluid(env, meta0); - arg->mi_meta0_sign = meta0->mm_datasync_sign; - arg->mi_meta1_txnid = mdbx_meta_txnid_fluid(env, meta1); - arg->mi_meta1_sign = meta1->mm_datasync_sign; - arg->mi_meta2_txnid = mdbx_meta_txnid_fluid(env, meta2); - arg->mi_meta2_sign = meta2->mm_datasync_sign; - if (likely(bytes > size_before_bootid)) { - arg->mi_bootid.meta0.l = meta0->mm_bootid.x; - arg->mi_bootid.meta1.l = meta0->mm_bootid.x; - arg->mi_bootid.meta2.l = meta0->mm_bootid.x; - arg->mi_bootid.meta0.h = meta0->mm_bootid.y; - arg->mi_bootid.meta1.h = meta0->mm_bootid.y; - arg->mi_bootid.meta2.h = meta0->mm_bootid.y; - } - - const MDBX_meta *txn_meta = recent_meta; - arg->mi_last_pgno = txn_meta->mm_geo.next - 1; - arg->mi_geo.current = pgno2bytes(env, txn_meta->mm_geo.now); - if (txn) { - arg->mi_last_pgno = txn->mt_next_pgno - 1; - arg->mi_geo.current = pgno2bytes(env, txn->mt_end_pgno); - - const txnid_t wanna_meta_txnid = (txn->mt_flags & MDBX_RDONLY) - ? txn->mt_txnid - : txn->mt_txnid - MDBX_TXNID_STEP; - txn_meta = (arg->mi_meta0_txnid == wanna_meta_txnid) ? meta0 : txn_meta; - txn_meta = (arg->mi_meta1_txnid == wanna_meta_txnid) ? meta1 : txn_meta; - txn_meta = (arg->mi_meta2_txnid == wanna_meta_txnid) ? meta2 : txn_meta; - } - arg->mi_geo.lower = pgno2bytes(env, txn_meta->mm_geo.lower); - arg->mi_geo.upper = pgno2bytes(env, txn_meta->mm_geo.upper); - arg->mi_geo.shrink = pgno2bytes(env, txn_meta->mm_geo.shrink); - arg->mi_geo.grow = pgno2bytes(env, txn_meta->mm_geo.grow); - unsynced_pages = *env->me_unsynced_pages + - (*env->me_meta_sync_txnid != (uint32_t)arg->mi_last_pgno); - - arg->mi_mapsize = env->me_dxb_mmap.limit; - mdbx_compiler_barrier(); - if (likely(arg->mi_meta0_txnid == mdbx_meta_txnid_fluid(env, meta0) && - arg->mi_meta0_sign == meta0->mm_datasync_sign && - arg->mi_meta1_txnid == mdbx_meta_txnid_fluid(env, meta1) && - arg->mi_meta1_sign == meta1->mm_datasync_sign && - arg->mi_meta2_txnid == mdbx_meta_txnid_fluid(env, meta2) && - arg->mi_meta2_sign == meta2->mm_datasync_sign && - recent_meta == mdbx_meta_head(env) && - arg->mi_recent_txnid == mdbx_meta_txnid_fluid(env, recent_meta))) - break; - } - - arg->mi_maxreaders = env->me_maxreaders; - arg->mi_numreaders = env->me_lck ? env->me_lck->mti_numreaders : INT32_MAX; - arg->mi_dxb_pagesize = env->me_psize; - arg->mi_sys_pagesize = env->me_os_psize; - - const MDBX_lockinfo *const lck = env->me_lck; - if (likely(bytes > size_before_bootid)) { - arg->mi_unsync_volume = pgno2bytes(env, unsynced_pages); - const uint64_t monotime_now = mdbx_osal_monotime(); - arg->mi_since_sync_seconds16dot16 = - mdbx_osal_monotime_to_16dot16(monotime_now - *env->me_sync_timestamp); - arg->mi_since_reader_check_seconds16dot16 = - lck ? mdbx_osal_monotime_to_16dot16(monotime_now - - lck->mti_reader_check_timestamp) - : 0; - arg->mi_autosync_threshold = pgno2bytes(env, *env->me_autosync_threshold); - arg->mi_autosync_period_seconds16dot16 = - mdbx_osal_monotime_to_16dot16(*env->me_autosync_period); - arg->mi_bootid.current.l = bootid.x; - arg->mi_bootid.current.h = bootid.y; - arg->mi_mode = lck ? lck->mti_envmode : env->me_flags; - } - - arg->mi_self_latter_reader_txnid = arg->mi_latter_reader_txnid = 0; - if (lck) { - arg->mi_self_latter_reader_txnid = arg->mi_latter_reader_txnid = - arg->mi_recent_txnid; - for (unsigned i = 0; i < arg->mi_numreaders; ++i) { - const uint32_t pid = lck->mti_readers[i].mr_pid; - if (pid) { - const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - if (arg->mi_latter_reader_txnid > txnid) - arg->mi_latter_reader_txnid = txnid; - if (pid == env->me_pid && arg->mi_self_latter_reader_txnid > txnid) - arg->mi_self_latter_reader_txnid = txnid; - } - } - } - - return MDBX_SUCCESS; -} - -static MDBX_cmp_func *mdbx_default_keycmp(unsigned flags) { - return (flags & MDBX_REVERSEKEY) - ? mdbx_cmp_memnr - : (flags & MDBX_INTEGERKEY) ? mdbx_cmp_int_align2 : mdbx_cmp_memn; -} - -static MDBX_cmp_func *mdbx_default_datacmp(unsigned flags) { - return !(flags & MDBX_DUPSORT) - ? mdbx_cmp_memn - : ((flags & MDBX_INTEGERDUP) - ? mdbx_cmp_int_unaligned - : ((flags & MDBX_REVERSEDUP) ? mdbx_cmp_memnr - : mdbx_cmp_memn)); -} - -static int mdbx_dbi_bind(MDBX_txn *txn, const MDBX_dbi dbi, unsigned user_flags, - MDBX_cmp_func *keycmp, MDBX_cmp_func *datacmp) { - /* LY: so, accepting only three cases for the table's flags: - * 1) user_flags and both comparators are zero - * = assume that a by-default mode/flags is requested for reading; - * 2) user_flags exactly the same - * = assume that the target mode/flags are requested properly; - * 3) user_flags differs, but table is empty and MDBX_CREATE is provided - * = assume that a properly create request with custom flags; - */ - if ((user_flags ^ txn->mt_dbs[dbi].md_flags) & PERSISTENT_FLAGS) { - /* flags ara differs, check other conditions */ - if (!user_flags && (!keycmp || keycmp == txn->mt_dbxs[dbi].md_cmp) && - (!datacmp || datacmp == txn->mt_dbxs[dbi].md_dcmp)) { - /* no comparators were provided and flags are zero, - * seems that is case #1 above */ - user_flags = txn->mt_dbs[dbi].md_flags; - } else if ((user_flags & MDBX_CREATE) && txn->mt_dbs[dbi].md_entries == 0) { - if (txn->mt_flags & MDBX_RDONLY) - return /* FIXME: return extended info */ MDBX_EACCESS; - /* make sure flags changes get committed */ - txn->mt_dbs[dbi].md_flags = user_flags & PERSISTENT_FLAGS; - txn->mt_flags |= MDBX_TXN_DIRTY; - } else { - return /* FIXME: return extended info */ MDBX_INCOMPATIBLE; - } - } - - if (!keycmp) - keycmp = txn->mt_dbxs[dbi].md_cmp ? txn->mt_dbxs[dbi].md_cmp - : mdbx_default_keycmp(user_flags); - if (txn->mt_dbxs[dbi].md_cmp != keycmp) { - if (txn->mt_dbxs[dbi].md_cmp) - return MDBX_EINVAL; - txn->mt_dbxs[dbi].md_cmp = keycmp; - } - - if (!datacmp) - datacmp = txn->mt_dbxs[dbi].md_dcmp ? txn->mt_dbxs[dbi].md_dcmp - : mdbx_default_datacmp(user_flags); - if (txn->mt_dbxs[dbi].md_dcmp != datacmp) { - if (txn->mt_dbxs[dbi].md_dcmp) - return MDBX_EINVAL; - txn->mt_dbxs[dbi].md_dcmp = datacmp; - } - - return MDBX_SUCCESS; -} - -int mdbx_dbi_open_ex(MDBX_txn *txn, const char *table_name, unsigned user_flags, - MDBX_dbi *dbi, MDBX_cmp_func *keycmp, - MDBX_cmp_func *datacmp) { - if (unlikely(!dbi || (user_flags & ~VALID_FLAGS) != 0)) - return MDBX_EINVAL; - *dbi = 0; - - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - switch (user_flags & - (MDBX_INTEGERDUP | MDBX_DUPFIXED | MDBX_DUPSORT | MDBX_REVERSEDUP)) { - default: - return MDBX_EINVAL; - case MDBX_DUPSORT: - case MDBX_DUPSORT | MDBX_REVERSEDUP: - case MDBX_DUPSORT | MDBX_DUPFIXED: - case MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_REVERSEDUP: - case MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP: - case MDBX_DUPSORT | MDBX_DUPFIXED | MDBX_INTEGERDUP | MDBX_REVERSEDUP: - case 0: - break; - } - - /* main table? */ - if (!table_name) { - rc = mdbx_dbi_bind(txn, MAIN_DBI, user_flags, keycmp, datacmp); - if (likely(rc == MDBX_SUCCESS)) - *dbi = MAIN_DBI; - return rc; - } - - if (txn->mt_dbxs[MAIN_DBI].md_cmp == NULL) { - txn->mt_dbxs[MAIN_DBI].md_cmp = - mdbx_default_keycmp(txn->mt_dbs[MAIN_DBI].md_flags); - txn->mt_dbxs[MAIN_DBI].md_dcmp = - mdbx_default_datacmp(txn->mt_dbs[MAIN_DBI].md_flags); - } - - /* Is the DB already open? */ - size_t len = strlen(table_name); - MDBX_dbi scan, slot; - for (slot = scan = txn->mt_numdbs; --scan >= CORE_DBS;) { - if (!txn->mt_dbxs[scan].md_name.iov_len) { - /* Remember this free slot */ - slot = scan; - continue; - } - if (len == txn->mt_dbxs[scan].md_name.iov_len && - !strncmp(table_name, txn->mt_dbxs[scan].md_name.iov_base, len)) { - *dbi = scan; - return mdbx_dbi_bind(txn, scan, user_flags, keycmp, datacmp); - } - } - - /* Fail, if no free slot and max hit */ - MDBX_env *env = txn->mt_env; - if (unlikely(slot >= env->me_maxdbs)) - return MDBX_DBS_FULL; - - /* Cannot mix named table with some main-table flags */ - if (unlikely(txn->mt_dbs[MAIN_DBI].md_flags & - (MDBX_DUPSORT | MDBX_INTEGERKEY))) - return (user_flags & MDBX_CREATE) ? MDBX_INCOMPATIBLE : MDBX_NOTFOUND; - - /* Find the DB info */ - int exact = 0; - MDBX_val key, data; - key.iov_len = len; - key.iov_base = (void *)table_name; - MDBX_cursor mc; - rc = mdbx_cursor_init(&mc, txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_set(&mc, &key, &data, MDBX_SET, &exact); - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc != MDBX_NOTFOUND || !(user_flags & MDBX_CREATE)) - return rc; - } else { - /* make sure this is actually a table */ - MDBX_node *node = page_node(mc.mc_pg[mc.mc_top], mc.mc_ki[mc.mc_top]); - if (unlikely((node_flags(node) & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA)) - return MDBX_INCOMPATIBLE; - if (unlikely(data.iov_len < sizeof(MDBX_db))) - return MDBX_CORRUPTED; - } - - if (rc != MDBX_SUCCESS && unlikely(txn->mt_flags & MDBX_RDONLY)) - return MDBX_EACCESS; - - /* Done here so we cannot fail after creating a new DB */ - char *namedup = mdbx_strdup(table_name); - if (unlikely(!namedup)) - return MDBX_ENOMEM; - - int err = mdbx_fastmutex_acquire(&env->me_dbi_lock); - if (unlikely(err != MDBX_SUCCESS)) { - mdbx_free(namedup); - return err; - } - - if (txn->mt_numdbs < env->me_numdbs) { - for (unsigned i = txn->mt_numdbs; i < env->me_numdbs; ++i) { - txn->mt_dbflags[i] = 0; - if (env->me_dbflags[i] & MDBX_VALID) { - txn->mt_dbs[i].md_flags = env->me_dbflags[i] & PERSISTENT_FLAGS; - txn->mt_dbflags[i] = DB_VALID | DB_USRVALID | DB_STALE; - mdbx_tassert(txn, txn->mt_dbxs[i].md_cmp != NULL); - } - } - txn->mt_numdbs = env->me_numdbs; - } - - for (slot = scan = txn->mt_numdbs; --scan >= CORE_DBS;) { - if (!txn->mt_dbxs[scan].md_name.iov_len) { - /* Remember this free slot */ - slot = scan; - continue; - } - if (len == txn->mt_dbxs[scan].md_name.iov_len && - !strncmp(table_name, txn->mt_dbxs[scan].md_name.iov_base, len)) { - *dbi = scan; - rc = mdbx_dbi_bind(txn, scan, user_flags, keycmp, datacmp); - goto bailout; - } - } - - if (unlikely(slot >= env->me_maxdbs)) { - rc = MDBX_DBS_FULL; - goto bailout; - } - - unsigned dbflag = DB_FRESH | DB_VALID | DB_USRVALID; - MDBX_db db_dummy; - if (unlikely(rc)) { - /* MDBX_NOTFOUND and MDBX_CREATE: Create new DB */ - mdbx_tassert(txn, rc == MDBX_NOTFOUND); - memset(&db_dummy, 0, sizeof(db_dummy)); - db_dummy.md_root = P_INVALID; - db_dummy.md_flags = user_flags & PERSISTENT_FLAGS; - data.iov_len = sizeof(db_dummy); - data.iov_base = &db_dummy; - WITH_CURSOR_TRACKING( - mc, - rc = mdbx_cursor_put(&mc, &key, &data, F_SUBDATA | MDBX_NOOVERWRITE)); - - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - dbflag |= DB_DIRTY | DB_CREAT; - } - - /* Got info, register DBI in this txn */ - txn->mt_dbxs[slot].md_cmp = nullptr; - txn->mt_dbxs[slot].md_dcmp = nullptr; - txn->mt_dbs[slot] = *(MDBX_db *)data.iov_base; - env->me_dbflags[slot] = 0; - rc = mdbx_dbi_bind(txn, slot, user_flags, keycmp, datacmp); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_tassert(txn, (dbflag & DB_CREAT) == 0); - bailout: - mdbx_free(namedup); - } else { - txn->mt_dbflags[slot] = (uint8_t)dbflag; - txn->mt_dbxs[slot].md_name.iov_base = namedup; - txn->mt_dbxs[slot].md_name.iov_len = len; - txn->mt_numdbs += (slot == txn->mt_numdbs); - if ((dbflag & DB_CREAT) == 0) { - env->me_dbflags[slot] = txn->mt_dbs[slot].md_flags | MDBX_VALID; - mdbx_compiler_barrier(); - if (env->me_numdbs <= slot) - env->me_numdbs = slot + 1; - } else { - env->me_dbiseqs[slot] += 1; - } - txn->mt_dbiseqs[slot] = env->me_dbiseqs[slot]; - *dbi = slot; - } - - mdbx_ensure(env, mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); - return rc; -} - -int mdbx_dbi_open(MDBX_txn *txn, const char *table_name, unsigned table_flags, - MDBX_dbi *dbi) { - return mdbx_dbi_open_ex(txn, table_name, table_flags, dbi, nullptr, nullptr); -} - -int __cold mdbx_dbi_stat(MDBX_txn *txn, MDBX_dbi dbi, MDBX_stat *dest, - size_t bytes) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!dest)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_VALID))) - return MDBX_EINVAL; - - const size_t size_before_modtxnid = offsetof(MDBX_stat, ms_mod_txnid); - if (unlikely(bytes != sizeof(MDBX_stat)) && bytes != size_before_modtxnid) - return MDBX_EINVAL; - - if (unlikely(txn->mt_flags & MDBX_TXN_BLOCKED)) - return MDBX_BAD_TXN; - - if (unlikely(txn->mt_dbflags[dbi] & DB_STALE)) { - rc = mdbx_fetch_sdb(txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - mdbx_stat0(txn->mt_env, &txn->mt_dbs[dbi], dest, bytes); - return MDBX_SUCCESS; -} - -static int mdbx_dbi_close_locked(MDBX_env *env, MDBX_dbi dbi) { - mdbx_assert(env, dbi >= CORE_DBS); - if (unlikely(dbi >= env->me_numdbs)) - return MDBX_BAD_DBI; - - char *ptr = env->me_dbxs[dbi].md_name.iov_base; - /* If there was no name, this was already closed */ - if (unlikely(!ptr)) - return MDBX_BAD_DBI; - - env->me_dbflags[dbi] = 0; - env->me_dbxs[dbi].md_name.iov_len = 0; - mdbx_compiler_barrier(); - env->me_dbiseqs[dbi]++; - env->me_dbxs[dbi].md_name.iov_base = NULL; - mdbx_free(ptr); - return MDBX_SUCCESS; -} - -int mdbx_dbi_close(MDBX_env *env, MDBX_dbi dbi) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(dbi < CORE_DBS || dbi >= env->me_maxdbs)) - return MDBX_EINVAL; - - int rc = mdbx_fastmutex_acquire(&env->me_dbi_lock); - if (likely(rc == MDBX_SUCCESS)) { - rc = mdbx_dbi_close_locked(env, dbi); - mdbx_ensure(env, mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); - } - return rc; -} - -int mdbx_dbi_flags_ex(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags, - unsigned *state) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!flags || !state)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_VALID))) - return MDBX_EINVAL; - - *flags = txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS; - *state = txn->mt_dbflags[dbi] & (DB_FRESH | DB_CREAT | DB_DIRTY | DB_STALE); - - return MDBX_SUCCESS; -} - -int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags) { - unsigned state; - return mdbx_dbi_flags_ex(txn, dbi, flags, &state); -} - -/* Add all the DB's pages to the free list. - * [in] mc Cursor on the DB to free. - * [in] subs non-Zero to check for sub-DBs in this DB. - * Returns 0 on success, non-zero on failure. */ -static int mdbx_drop0(MDBX_cursor *mc, int subs) { - int rc = mdbx_page_search(mc, NULL, MDBX_PS_FIRST); - if (likely(rc == MDBX_SUCCESS)) { - MDBX_txn *txn = mc->mc_txn; - MDBX_cursor mx; - unsigned i; - - /* DUPSORT sub-DBs have no ovpages/DBs. Omit scanning leaves. - * This also avoids any P_LEAF2 pages, which have no nodes. - * Also if the DB doesn't have sub-DBs and has no overflow - * pages, omit scanning leaves. */ - if ((mc->mc_flags & C_SUB) || (subs | mc->mc_db->md_overflow_pages) == 0) - mdbx_cursor_pop(mc); - - rc = mdbx_pnl_need(&txn->tw.retired_pages, - mc->mc_db->md_branch_pages + mc->mc_db->md_leaf_pages + - mc->mc_db->md_overflow_pages); - if (unlikely(rc)) - goto done; - - mdbx_cursor_copy(mc, &mx); - while (mc->mc_snum > 0) { - MDBX_page *mp = mc->mc_pg[mc->mc_top]; - unsigned n = page_numkeys(mp); - if (IS_LEAF(mp)) { - for (i = 0; i < n; i++) { - MDBX_node *node = page_node(mp, i); - if (node_flags(node) & F_BIGDATA) { - MDBX_page *omp; - rc = mdbx_page_get(mc, node_largedata_pgno(node), &omp, NULL); - if (unlikely(rc)) - goto done; - mdbx_cassert(mc, IS_OVERFLOW(omp)); - rc = mdbx_page_retire(mc, omp); - if (unlikely(rc)) - goto done; - if (!mc->mc_db->md_overflow_pages && !subs) - break; - } else if (subs && (node_flags(node) & F_SUBDATA)) { - rc = mdbx_xcursor_init1(mc, node); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - rc = mdbx_drop0(&mc->mc_xcursor->mx_cursor, 0); - if (unlikely(rc)) - goto done; - } - } - if (!subs && !mc->mc_db->md_overflow_pages) - goto pop; - } else { - for (i = 0; i < n; i++) { - /* free it */ - rc = mdbx_retire_pgno(mc, node_pgno(page_node(mp, i))); - if (unlikely(rc)) - goto done; - } - } - if (!mc->mc_top) - break; - mdbx_cassert(mc, i <= UINT16_MAX); - mc->mc_ki[mc->mc_top] = (indx_t)i; - rc = mdbx_cursor_sibling(mc, 1); - if (rc) { - if (unlikely(rc != MDBX_NOTFOUND)) - goto done; - /* no more siblings, go back to beginning - * of previous level. */ - pop: - mdbx_cursor_pop(mc); - mc->mc_ki[0] = 0; - for (i = 1; i < mc->mc_snum; i++) { - mc->mc_ki[i] = 0; - mc->mc_pg[i] = mx.mc_pg[i]; - } - } - } - /* free it */ - rc = mdbx_retire_pgno(mc, mc->mc_db->md_root); - done: - if (unlikely(rc)) - txn->mt_flags |= MDBX_TXN_ERROR; - } else if (rc == MDBX_NOTFOUND) { - rc = MDBX_SUCCESS; - } - mc->mc_flags &= ~C_INITIALIZED; - return rc; -} - -int mdbx_drop(MDBX_txn *txn, MDBX_dbi dbi, int del) { - int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(1 < (unsigned)del)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) - return MDBX_BAD_DBI; - - MDBX_cursor *mc; - rc = mdbx_cursor_open(txn, dbi, &mc); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) { - rc = MDBX_EINVAL; - goto bailout; - } - - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) { - rc = MDBX_BAD_DBI; - goto bailout; - } - - rc = mdbx_drop0(mc, mc->mc_db->md_flags & MDBX_DUPSORT); - /* Invalidate the dropped DB's cursors */ - for (MDBX_cursor *m2 = txn->mt_cursors[dbi]; m2; m2 = m2->mc_next) - m2->mc_flags &= ~(C_INITIALIZED | C_EOF); - if (unlikely(rc)) - goto bailout; - - /* Can't delete the main DB */ - if (del && dbi >= CORE_DBS) { - rc = mdbx_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, F_SUBDATA); - if (likely(rc == MDBX_SUCCESS)) { - txn->mt_dbflags[dbi] = DB_STALE; - MDBX_env *env = txn->mt_env; - rc = mdbx_fastmutex_acquire(&env->me_dbi_lock); - if (unlikely(rc != MDBX_SUCCESS)) { - txn->mt_flags |= MDBX_TXN_ERROR; - goto bailout; - } - mdbx_dbi_close_locked(env, dbi); - mdbx_ensure(env, - mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); - } else { - txn->mt_flags |= MDBX_TXN_ERROR; - } - } else { - /* reset the DB record, mark it dirty */ - txn->mt_dbflags[dbi] |= DB_DIRTY; - txn->mt_dbs[dbi].md_depth = 0; - txn->mt_dbs[dbi].md_branch_pages = 0; - txn->mt_dbs[dbi].md_leaf_pages = 0; - txn->mt_dbs[dbi].md_overflow_pages = 0; - txn->mt_dbs[dbi].md_entries = 0; - txn->mt_dbs[dbi].md_root = P_INVALID; - txn->mt_dbs[dbi].md_seq = 0; - txn->mt_flags |= MDBX_TXN_DIRTY; - } - -bailout: - mdbx_cursor_close(mc); - return rc; -} - -int mdbx_set_compare(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cmp_func *cmp) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - txn->mt_dbxs[dbi].md_cmp = cmp; - return MDBX_SUCCESS; -} - -int mdbx_set_dupsort(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cmp_func *cmp) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - txn->mt_dbxs[dbi].md_dcmp = cmp; - return MDBX_SUCCESS; -} - -int __cold mdbx_reader_list(MDBX_env *env, MDBX_reader_list_func *func, - void *ctx) { - if (unlikely(!env || !func)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = MDBX_RESULT_TRUE; - int serial = 0; - if (likely(env->me_lck)) { - const unsigned snap_nreaders = env->me_lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; i++) { - const MDBX_reader *r = env->me_lck->mti_readers + i; - retry_reader:; - const uint32_t pid = r->mr_pid; - if (!pid) - continue; - txnid_t txnid = safe64_read(&r->mr_txnid); - const size_t tid = r->mr_tid; - const pgno_t pages_used = r->mr_snapshot_pages_used; - const uint64_t reader_pages_retired = r->mr_snapshot_pages_retired; - mdbx_compiler_barrier(); - if (unlikely(tid != r->mr_tid || - pages_used != r->mr_snapshot_pages_used || - reader_pages_retired != r->mr_snapshot_pages_retired || - txnid != safe64_read(&r->mr_txnid) || pid != r->mr_pid)) - goto retry_reader; - - mdbx_assert(env, txnid > 0); - if (txnid >= SAFE64_INVALID_THRESHOLD) - txnid = 0; - - size_t bytes_used = 0; - size_t bytes_retained = 0; - uint64_t lag = 0; - if (txnid) { - retry_header:; - const MDBX_meta *const recent_meta = mdbx_meta_head(env); - const uint64_t head_pages_retired = recent_meta->mm_pages_retired; - const txnid_t head_txnid = mdbx_meta_txnid_fluid(env, recent_meta); - mdbx_compiler_barrier(); - if (unlikely(recent_meta != mdbx_meta_head(env) || - head_pages_retired != recent_meta->mm_pages_retired) || - head_txnid != mdbx_meta_txnid_fluid(env, recent_meta)) - goto retry_header; - - lag = (head_txnid - txnid) / MDBX_TXNID_STEP; - bytes_used = pgno2bytes(env, pages_used); - bytes_retained = (head_pages_retired > reader_pages_retired) - ? pgno2bytes(env, (pgno_t)(head_pages_retired - - reader_pages_retired)) - : 0; - } - rc = func(ctx, ++serial, i, pid, (mdbx_tid_t)tid, txnid, lag, bytes_used, - bytes_retained); - if (unlikely(rc != MDBX_SUCCESS)) - break; - } - } - - return rc; -} - -/* Insert pid into list if not already present. - * return -1 if already present. */ -static int __cold mdbx_pid_insert(uint32_t *ids, uint32_t pid) { - /* binary search of pid in list */ - unsigned base = 0; - unsigned cursor = 1; - int val = 0; - unsigned n = ids[0]; - - while (n > 0) { - unsigned pivot = n >> 1; - cursor = base + pivot + 1; - val = pid - ids[cursor]; - - if (val < 0) { - n = pivot; - } else if (val > 0) { - base = cursor; - n -= pivot + 1; - } else { - /* found, so it's a duplicate */ - return -1; - } - } - - if (val > 0) - ++cursor; - - ids[0]++; - for (n = ids[0]; n > cursor; n--) - ids[n] = ids[n - 1]; - ids[n] = pid; - return 0; -} - -int __cold mdbx_reader_check(MDBX_env *env, int *dead) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (dead) - *dead = 0; - return mdbx_reader_check0(env, false, dead); -} - -/* Return: - * MDBX_RESULT_TRUE - done and mutex recovered - * MDBX_SUCCESS - done - * Otherwise errcode. */ -int __cold mdbx_reader_check0(MDBX_env *env, int rdt_locked, int *dead) { - mdbx_assert(env, rdt_locked >= 0); - -#if MDBX_TXN_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_TXN_CHECKPID */ - - MDBX_lockinfo *const lck = env->me_lck; - if (unlikely(lck == NULL)) { - /* exclusive mode */ - if (dead) - *dead = 0; - return MDBX_SUCCESS; - } - - lck->mti_reader_check_timestamp = mdbx_osal_monotime(); - const unsigned snap_nreaders = lck->mti_numreaders; - uint32_t pidsbuf_onstask[142]; - uint32_t *const pids = - (snap_nreaders < ARRAY_LENGTH(pidsbuf_onstask)) - ? pidsbuf_onstask - : mdbx_malloc((snap_nreaders + 1) * sizeof(uint32_t)); - if (unlikely(!pids)) - return MDBX_ENOMEM; - - pids[0] = 0; - - int rc = MDBX_SUCCESS, count = 0; - for (unsigned i = 0; i < snap_nreaders; i++) { - const uint32_t pid = lck->mti_readers[i].mr_pid; - if (pid == 0) - continue /* skip empty */; - if (pid == env->me_pid) - continue /* skip self */; - if (mdbx_pid_insert(pids, pid) != 0) - continue /* such pid already processed */; - - int err = mdbx_rpid_check(env, pid); - if (err == MDBX_RESULT_TRUE) - continue /* reader is live */; - - if (err != MDBX_SUCCESS) { - rc = err; - break /* mdbx_rpid_check() failed */; - } - - /* stale reader found */ - if (!rdt_locked) { - err = mdbx_rdt_lock(env); - if (MDBX_IS_ERROR(err)) { - rc = err; - break; - } - - rdt_locked = -1; - if (err == MDBX_RESULT_TRUE) { - /* mutex recovered, the mdbx_ipclock_failed() checked all readers */ - rc = MDBX_RESULT_TRUE; - break; - } - - /* a other process may have clean and reused slot, recheck */ - if (lck->mti_readers[i].mr_pid != pid) - continue; - - err = mdbx_rpid_check(env, pid); - if (MDBX_IS_ERROR(err)) { - rc = err; - break; - } - - if (err != MDBX_SUCCESS) - continue /* the race with other process, slot reused */; - } - - /* clean it */ - for (unsigned j = i; j < snap_nreaders; j++) { - if (lck->mti_readers[j].mr_pid == pid) { - mdbx_debug("clear stale reader pid %" PRIuPTR " txn %" PRIaTXN, - (size_t)pid, lck->mti_readers[j].mr_txnid.inconsistent); - lck->mti_readers[j].mr_pid = 0; - lck->mti_readers_refresh_flag = true; - count++; - } - } - } - - if (rdt_locked < 0) - mdbx_rdt_unlock(env); - - if (pids != pidsbuf_onstask) - mdbx_free(pids); - - if (dead) - *dead = count; - return rc; -} - -int __cold mdbx_setup_debug(int loglevel, int flags, MDBX_debug_func *logger) { - const int rc = mdbx_runtime_flags | (mdbx_loglevel << 16); - -#if !MDBX_DEBUG - (void)loglevel; -#else - if (loglevel != MDBX_LOG_DONTCHANGE) - mdbx_loglevel = (uint8_t)loglevel; -#endif - - if (flags != MDBX_DBG_DONTCHANGE) { - flags &= -#if MDBX_DEBUG - MDBX_DBG_ASSERT | MDBX_DBG_AUDIT | MDBX_DBG_JITTER | -#endif - MDBX_DBG_DUMP | MDBX_DBG_LEGACY_MULTIOPEN | MDBX_DBG_LEGACY_OVERLAP; - mdbx_runtime_flags = (uint8_t)flags; - } - - if (logger != MDBX_LOGGER_DONTCHANGE) - mdbx_debug_logger = logger; - return rc; -} - -static txnid_t __cold mdbx_oomkick(MDBX_env *env, const txnid_t laggard) { - mdbx_debug("%s", "DB size maxed out"); - - int retry; - for (retry = 0; retry < INT_MAX; ++retry) { - txnid_t oldest = mdbx_recent_steady_txnid(env); - mdbx_assert(env, oldest < env->me_txn0->mt_txnid); - mdbx_assert(env, oldest >= laggard); - mdbx_assert(env, oldest >= *env->me_oldest); - if (oldest == laggard || unlikely(env->me_lck == NULL /* exclusive mode */)) - return oldest; - - if (MDBX_IS_ERROR(mdbx_reader_check0(env, false, NULL))) - break; - - MDBX_reader *asleep = nullptr; - MDBX_lockinfo *const lck = env->me_lck; - uint64_t oldest_retired = UINT64_MAX; - const unsigned snap_nreaders = lck->mti_numreaders; - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (lck->mti_readers[i].mr_pid) { - /* mdbx_jitter4testing(true); */ - const uint64_t snap_retired = - lck->mti_readers[i].mr_snapshot_pages_retired; - const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - mdbx_memory_barrier(); - if (unlikely(snap_retired != - lck->mti_readers[i].mr_snapshot_pages_retired || - snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) - goto retry; - if (oldest > snap_txnid && - laggard <= /* ignore pending updates */ snap_txnid) { - oldest = snap_txnid; - oldest_retired = snap_retired; - asleep = &lck->mti_readers[i]; - } - } - } - - if (laggard < oldest || !asleep) { - if (retry && env->me_oom_func) { - /* LY: notify end of oom-loop */ - const txnid_t gap = oldest - laggard; - env->me_oom_func(env, 0, 0, laggard, - (gap < UINT_MAX) ? (unsigned)gap : UINT_MAX, 0, - -retry); - } - mdbx_notice("oom-kick: update oldest %" PRIaTXN " -> %" PRIaTXN, - *env->me_oldest, oldest); - mdbx_assert(env, *env->me_oldest <= oldest); - return *env->me_oldest = oldest; - } - - if (!env->me_oom_func) - break; - - uint32_t pid = asleep->mr_pid; - size_t tid = asleep->mr_tid; - if (safe64_read(&asleep->mr_txnid) != laggard || pid <= 0) - continue; - - const MDBX_meta *head_meta = mdbx_meta_head(env); - const txnid_t gap = - (mdbx_meta_txnid_stable(env, head_meta) - laggard) / MDBX_TXNID_STEP; - const uint64_t head_retired = head_meta->mm_pages_retired; - const size_t space = - (oldest_retired > head_retired) - ? pgno2bytes(env, (pgno_t)(oldest_retired - head_retired)) - : 0; - int rc = env->me_oom_func(env, pid, (mdbx_tid_t)tid, laggard, - (gap < UINT_MAX) ? (unsigned)gap : UINT_MAX, - space, retry); - if (rc < 0) - break; - - if (rc > 0) { - if (rc == 1) { - safe64_reset_compare(&asleep->mr_txnid, laggard); - } else { - safe64_reset(&asleep->mr_txnid, true); - asleep->mr_tid = 0; - asleep->mr_pid = 0; - } - lck->mti_readers_refresh_flag = true; - mdbx_flush_incoherent_cpu_writeback(); - } - } - - if (retry && env->me_oom_func) { - /* LY: notify end of oom-loop */ - env->me_oom_func(env, 0, 0, laggard, 0, 0, -retry); - } - return mdbx_find_oldest(env->me_txn); -} - -int __cold mdbx_env_set_syncbytes(MDBX_env *env, size_t threshold) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR))) - return MDBX_EACCESS; - - if (unlikely(!env->me_map)) - return MDBX_EPERM; - - *env->me_autosync_threshold = bytes2pgno(env, threshold + env->me_psize - 1); - if (threshold) { - int err = mdbx_env_sync_poll(env); - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } - return MDBX_SUCCESS; -} - -int __cold mdbx_env_set_syncperiod(MDBX_env *env, unsigned seconds_16dot16) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely(env->me_flags & (MDBX_RDONLY | MDBX_FATAL_ERROR))) - return MDBX_EACCESS; - - if (unlikely(!env->me_map)) - return MDBX_EPERM; - - *env->me_autosync_period = mdbx_osal_16dot16_to_monotime(seconds_16dot16); - if (seconds_16dot16) { - int err = mdbx_env_sync_poll(env); - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } - return MDBX_SUCCESS; -} - -int __cold mdbx_env_set_oomfunc(MDBX_env *env, MDBX_oom_func *oomfunc) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - - env->me_oom_func = oomfunc; - return MDBX_SUCCESS; -} - -MDBX_oom_func *__cold mdbx_env_get_oomfunc(MDBX_env *env) { - return likely(env && env->me_signature == MDBX_ME_SIGNATURE) - ? env->me_oom_func - : NULL; -} - -#ifdef __SANITIZE_THREAD__ -/* LY: avoid tsan-trap by me_txn, mm_last_pg and mt_next_pgno */ -__attribute__((__no_sanitize_thread__, __noinline__)) -#endif -int mdbx_txn_straggler(MDBX_txn *txn, int *percent) -{ - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return (rc > 0) ? -rc : rc; - - MDBX_env *env = txn->mt_env; - if (unlikely((txn->mt_flags & MDBX_RDONLY) == 0)) { - if (percent) - *percent = - (int)((txn->mt_next_pgno * UINT64_C(100) + txn->mt_end_pgno / 2) / - txn->mt_end_pgno); - return 0; - } - - txnid_t recent; - MDBX_meta *meta; - do { - meta = mdbx_meta_head(env); - recent = mdbx_meta_txnid_fluid(env, meta); - if (percent) { - const pgno_t maxpg = meta->mm_geo.now; - *percent = (int)((meta->mm_geo.next * UINT64_C(100) + maxpg / 2) / maxpg); - } - } while (unlikely(recent != mdbx_meta_txnid_fluid(env, meta))); - - txnid_t lag = (recent - txn->mt_txnid) / MDBX_TXNID_STEP; - return (lag > INT_MAX) ? INT_MAX : (int)lag; -} - -typedef struct mdbx_walk_ctx { - void *mw_user; - MDBX_pgvisitor_func *mw_visitor; - MDBX_cursor mw_cursor; -} mdbx_walk_ctx_t; - -/* Depth-first tree traversal. */ -static int __cold mdbx_env_walk(mdbx_walk_ctx_t *ctx, const char *dbi, - pgno_t pgno, int deep) { - if (unlikely(pgno == P_INVALID)) - return MDBX_SUCCESS; /* empty db */ - - MDBX_page *mp; - int rc = mdbx_page_get(&ctx->mw_cursor, pgno, &mp, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - rc = mdbx_page_check(ctx->mw_cursor.mc_txn->mt_env, mp, false); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - const int nkeys = page_numkeys(mp); - size_t header_size = IS_LEAF2(mp) ? PAGEHDRSZ : PAGEHDRSZ + mp->mp_lower; - size_t unused_size = page_room(mp); - size_t payload_size = 0; - size_t align_bytes = 0; - MDBX_page_type_t type; - - /* LY: Don't use mask here, e.g bitwise - * (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP). - * Pages should not me marked dirty/loose or otherwise. */ - switch (mp->mp_flags) { - case P_BRANCH: - type = MDBX_page_branch; - if (unlikely(nkeys < 2)) - return MDBX_CORRUPTED; - break; - case P_LEAF: - type = MDBX_page_leaf; - break; - case P_LEAF | P_LEAF2: - type = MDBX_page_dupfixed_leaf; - break; - default: - return MDBX_CORRUPTED; - } - - for (int i = 0; i < nkeys; - align_bytes += ((payload_size + align_bytes) & 1), i++) { - if (type == MDBX_page_dupfixed_leaf) { - /* LEAF2 pages have no mp_ptrs[] or node headers */ - payload_size += mp->mp_leaf2_ksize; - continue; - } - - MDBX_node *node = page_node(mp, i); - payload_size += NODESIZE + node_ks(node); - - if (type == MDBX_page_branch) { - assert(i > 0 || node_ks(node) == 0); - continue; - } - - assert(type == MDBX_page_leaf); - switch (node_flags(node)) { - case 0 /* usual node */: { - payload_size += node_ds(node); - } break; - - case F_BIGDATA /* long data on the large/overflow page */: { - payload_size += sizeof(pgno_t); - - const pgno_t large_pgno = node_largedata_pgno(node); - MDBX_page *op; - rc = mdbx_page_get(&ctx->mw_cursor, large_pgno, &op, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_page_check(ctx->mw_cursor.mc_txn->mt_env, op, false); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - /* LY: Don't use mask here, e.g bitwise - * (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP). - * Pages should not me marked dirty/loose or otherwise. */ - if (unlikely(P_OVERFLOW != op->mp_flags)) - return MDBX_CORRUPTED; - - const size_t over_header = PAGEHDRSZ; - const size_t over_payload = node_ds(node); - const size_t over_unused = - pgno2bytes(ctx->mw_cursor.mc_txn->mt_env, op->mp_pages) - - over_payload - over_header; - - rc = ctx->mw_visitor( - large_pgno, op->mp_pages, ctx->mw_user, deep, dbi, - pgno2bytes(ctx->mw_cursor.mc_txn->mt_env, op->mp_pages), - MDBX_page_large, 1, over_payload, over_header, over_unused); - } break; - - case F_SUBDATA /* sub-db */: { - const size_t namelen = node_ks(node); - if (unlikely(namelen == 0 || node_ds(node) < sizeof(MDBX_db))) - return MDBX_CORRUPTED; - payload_size += node_ds(node); - } break; - - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: { - if (unlikely(node_ds(node) != sizeof(MDBX_db))) - return MDBX_CORRUPTED; - payload_size += sizeof(MDBX_db); - } break; - - case F_DUPDATA /* short sub-page */: { - if (unlikely(node_ds(node) <= PAGEHDRSZ)) - return MDBX_CORRUPTED; - - MDBX_page *sp = node_data(node); - const int nsubkeys = page_numkeys(sp); - size_t subheader_size = - IS_LEAF2(sp) ? PAGEHDRSZ : PAGEHDRSZ + sp->mp_lower; - size_t subunused_size = page_room(sp); - size_t subpayload_size = 0; - size_t subalign_bytes = 0; - MDBX_page_type_t subtype; - - switch (sp->mp_flags & ~P_DIRTY /* ignore for sub-pages */) { - case P_LEAF | P_SUBP: - subtype = MDBX_subpage_leaf; - break; - case P_LEAF | P_LEAF2 | P_SUBP: - subtype = MDBX_subpage_dupfixed_leaf; - break; - default: - return MDBX_CORRUPTED; - } - - for (int j = 0; j < nsubkeys; - subalign_bytes += ((subpayload_size + subalign_bytes) & 1), j++) { - - if (subtype == MDBX_subpage_dupfixed_leaf) { - /* LEAF2 pages have no mp_ptrs[] or node headers */ - subpayload_size += sp->mp_leaf2_ksize; - } else { - assert(subtype == MDBX_subpage_leaf); - MDBX_node *subnode = page_node(sp, j); - subpayload_size += NODESIZE + node_ks(subnode) + node_ds(subnode); - if (unlikely(node_flags(subnode) != 0)) - return MDBX_CORRUPTED; - } - } - - rc = ctx->mw_visitor(pgno, 0, ctx->mw_user, deep + 1, dbi, node_ds(node), - subtype, nsubkeys, subpayload_size, subheader_size, - subunused_size + subalign_bytes); - header_size += subheader_size; - unused_size += subunused_size; - payload_size += subpayload_size; - align_bytes += subalign_bytes; - } break; - - default: - return MDBX_CORRUPTED; - } - - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - rc = ctx->mw_visitor(mp->mp_pgno, 1, ctx->mw_user, deep, dbi, - ctx->mw_cursor.mc_txn->mt_env->me_psize, type, nkeys, - payload_size, header_size, unused_size + align_bytes); - - if (unlikely(rc != MDBX_SUCCESS)) - return (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc; - - for (int i = 0; i < nkeys; i++) { - if (type == MDBX_page_dupfixed_leaf) - continue; - - MDBX_node *node = page_node(mp, i); - if (type == MDBX_page_branch) { - rc = mdbx_env_walk(ctx, dbi, node_pgno(node), deep + 1); - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc != MDBX_RESULT_TRUE) - return rc; - break; - } - continue; - } - - assert(type == MDBX_page_leaf); - MDBX_db db; - switch (node_flags(node)) { - default: - continue; - - case F_SUBDATA /* sub-db */: { - const size_t namelen = node_ks(node); - if (unlikely(namelen == 0 || node_ds(node) != sizeof(MDBX_db))) - return MDBX_CORRUPTED; - - char namebuf_onstask[142]; - char *const name = (namelen < sizeof(namebuf_onstask)) - ? namebuf_onstask - : mdbx_malloc(namelen + 1); - if (name) { - memcpy(name, node_key(node), namelen); - name[namelen] = 0; - memcpy(&db, node_data(node), sizeof(db)); - rc = mdbx_env_walk(ctx, name, db.md_root, deep + 1); - if (name != namebuf_onstask) - mdbx_free(name); - } else { - rc = MDBX_ENOMEM; - } - } break; - - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: - if (unlikely(node_ds(node) != sizeof(MDBX_db))) - return MDBX_CORRUPTED; - - memcpy(&db, node_data(node), sizeof(db)); - rc = mdbx_env_walk(ctx, dbi, db.md_root, deep + 1); - break; - } - - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - return MDBX_SUCCESS; -} - -int __cold mdbx_env_pgwalk(MDBX_txn *txn, MDBX_pgvisitor_func *visitor, - void *user) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - mdbx_walk_ctx_t ctx; - memset(&ctx, 0, sizeof(ctx)); - ctx.mw_cursor.mc_snum = 1; - ctx.mw_cursor.mc_txn = txn; - ctx.mw_user = user; - ctx.mw_visitor = visitor; - - rc = visitor(0, NUM_METAS, user, 0, MDBX_PGWALK_META, - pgno2bytes(txn->mt_env, NUM_METAS), MDBX_page_meta, NUM_METAS, - sizeof(MDBX_meta) * NUM_METAS, PAGEHDRSZ * NUM_METAS, - (txn->mt_env->me_psize - sizeof(MDBX_meta) - PAGEHDRSZ) * - NUM_METAS); - if (!MDBX_IS_ERROR(rc)) - rc = mdbx_env_walk(&ctx, MDBX_PGWALK_GC, txn->mt_dbs[FREE_DBI].md_root, 0); - if (!MDBX_IS_ERROR(rc)) - rc = - mdbx_env_walk(&ctx, MDBX_PGWALK_MAIN, txn->mt_dbs[MAIN_DBI].md_root, 0); - if (!MDBX_IS_ERROR(rc)) - rc = visitor(P_INVALID, 0, user, INT_MIN, NULL, 0, MDBX_page_void, 0, 0, 0, - 0); - return rc; -} - -int mdbx_canary_put(MDBX_txn *txn, const mdbx_canary *canary) { - int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (likely(canary)) { - if (txn->mt_canary.x == canary->x && txn->mt_canary.y == canary->y && - txn->mt_canary.z == canary->z) - return MDBX_SUCCESS; - txn->mt_canary.x = canary->x; - txn->mt_canary.y = canary->y; - txn->mt_canary.z = canary->z; - } - txn->mt_canary.v = txn->mt_txnid; - txn->mt_flags |= MDBX_TXN_DIRTY; - - return MDBX_SUCCESS; -} - -int mdbx_canary_get(MDBX_txn *txn, mdbx_canary *canary) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(canary == NULL)) - return MDBX_EINVAL; - - *canary = txn->mt_canary; - return MDBX_SUCCESS; -} - -int mdbx_cursor_on_first(MDBX_cursor *mc) { - if (unlikely(mc == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - if (!(mc->mc_flags & C_INITIALIZED)) - return MDBX_RESULT_FALSE; - - for (unsigned i = 0; i < mc->mc_snum; ++i) { - if (mc->mc_ki[i]) - return MDBX_RESULT_FALSE; - } - - return MDBX_RESULT_TRUE; -} - -int mdbx_cursor_on_last(MDBX_cursor *mc) { - if (unlikely(mc == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - if (!(mc->mc_flags & C_INITIALIZED)) - return MDBX_RESULT_FALSE; - - for (unsigned i = 0; i < mc->mc_snum; ++i) { - unsigned nkeys = page_numkeys(mc->mc_pg[i]); - if (mc->mc_ki[i] < nkeys - 1) - return MDBX_RESULT_FALSE; - } - - return MDBX_RESULT_TRUE; -} - -int mdbx_cursor_eof(MDBX_cursor *mc) { - if (unlikely(mc == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - if ((mc->mc_flags & C_INITIALIZED) == 0) - return MDBX_RESULT_TRUE; - - if (mc->mc_snum == 0) - return MDBX_RESULT_TRUE; - - if ((mc->mc_flags & C_EOF) && - mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top])) - return MDBX_RESULT_TRUE; - - return MDBX_RESULT_FALSE; -} - -//------------------------------------------------------------------------------ - -struct diff_result { - ptrdiff_t diff; - int level; - int root_nkeys; -}; - -/* calculates: r = x - y */ -__hot static int cursor_diff(const MDBX_cursor *const __restrict x, - const MDBX_cursor *const __restrict y, - struct diff_result *const __restrict r) { - r->diff = 0; - r->level = 0; - r->root_nkeys = 0; - - if (unlikely(y->mc_signature != MDBX_MC_SIGNATURE || - x->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = check_txn(x->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(x->mc_txn != y->mc_txn)) - return MDBX_BAD_TXN; - - if (unlikely(y->mc_dbi != x->mc_dbi)) - return MDBX_EINVAL; - - if (unlikely(!(y->mc_flags & x->mc_flags & C_INITIALIZED))) - return MDBX_ENODATA; - - while (likely(r->level < y->mc_snum && r->level < x->mc_snum)) { - if (unlikely(y->mc_pg[r->level] != x->mc_pg[r->level])) - return MDBX_PROBLEM; - - int nkeys = page_numkeys(y->mc_pg[r->level]); - assert(nkeys > 0); - if (r->level == 0) - r->root_nkeys = nkeys; - - const int limit_ki = nkeys - 1; - const int x_ki = x->mc_ki[r->level]; - const int y_ki = y->mc_ki[r->level]; - r->diff = ((x_ki < limit_ki) ? x_ki : limit_ki) - - ((y_ki < limit_ki) ? y_ki : limit_ki); - if (r->diff == 0) { - r->level += 1; - continue; - } - - while (unlikely(r->diff == 1) && - likely(r->level + 1 < y->mc_snum && r->level + 1 < x->mc_snum)) { - r->level += 1; - /* DB'PAGEs: 0------------------>MAX - * - * CURSORs: y < x - * STACK[i ]: | - * STACK[+1]: ...y++N|0++x... - */ - nkeys = page_numkeys(y->mc_pg[r->level]); - r->diff = (nkeys - y->mc_ki[r->level]) + x->mc_ki[r->level]; - assert(r->diff > 0); - } - - while (unlikely(r->diff == -1) && - likely(r->level + 1 < y->mc_snum && r->level + 1 < x->mc_snum)) { - r->level += 1; - /* DB'PAGEs: 0------------------>MAX - * - * CURSORs: x < y - * STACK[i ]: | - * STACK[+1]: ...x--N|0--y... - */ - nkeys = page_numkeys(x->mc_pg[r->level]); - r->diff = -(nkeys - x->mc_ki[r->level]) - y->mc_ki[r->level]; - assert(r->diff < 0); - } - - return MDBX_SUCCESS; - } - - r->diff = CMP2INT(x->mc_flags & C_EOF, y->mc_flags & C_EOF); - return MDBX_SUCCESS; -} - -__hot static ptrdiff_t estimate(const MDBX_db *db, - struct diff_result *const __restrict dr) { - /* root: branch-page => scale = leaf-factor * branch-factor^(N-1) - * level-1: branch-page(s) => scale = leaf-factor * branch-factor^2 - * level-2: branch-page(s) => scale = leaf-factor * branch-factor - * level-N: branch-page(s) => scale = leaf-factor - * leaf-level: leaf-page(s) => scale = 1 - */ - ptrdiff_t btree_power = db->md_depth - 2 - dr->level; - if (btree_power < 0) - return dr->diff; - - ptrdiff_t estimated = - (ptrdiff_t)db->md_entries * dr->diff / (ptrdiff_t)db->md_leaf_pages; - if (btree_power == 0) - return estimated; - - if (db->md_depth < 4) { - assert(dr->level == 0 && btree_power == 1); - return (ptrdiff_t)db->md_entries * dr->diff / (ptrdiff_t)dr->root_nkeys; - } - - /* average_branchpage_fillfactor = total(branch_entries) / branch_pages - total(branch_entries) = leaf_pages + branch_pages - 1 (root page) */ - const size_t log2_fixedpoint = sizeof(size_t) - 1; - const size_t half = UINT64_C(1) << (log2_fixedpoint - 1); - const size_t factor = - ((db->md_leaf_pages + db->md_branch_pages - 1) << log2_fixedpoint) / - db->md_branch_pages; - while (1) { - switch ((size_t)btree_power) { - default: { - const size_t square = (factor * factor + half) >> log2_fixedpoint; - const size_t quad = (square * square + half) >> log2_fixedpoint; - do { - estimated = estimated * quad + half; - estimated >>= log2_fixedpoint; - btree_power -= 4; - } while (btree_power >= 4); - continue; - } - case 3: - estimated = estimated * factor + half; - estimated >>= log2_fixedpoint; - __fallthrough /* fall through */; - case 2: - estimated = estimated * factor + half; - estimated >>= log2_fixedpoint; - __fallthrough /* fall through */; - case 1: - estimated = estimated * factor + half; - estimated >>= log2_fixedpoint; - __fallthrough /* fall through */; - case 0: - if (unlikely(estimated > (ptrdiff_t)db->md_entries)) - return (ptrdiff_t)db->md_entries; - if (unlikely(estimated < -(ptrdiff_t)db->md_entries)) - return -(ptrdiff_t)db->md_entries; - return estimated; - } - } -} - -int mdbx_estimate_distance(const MDBX_cursor *first, const MDBX_cursor *last, - ptrdiff_t *distance_items) { - if (unlikely(first == NULL || last == NULL || distance_items == NULL)) - return MDBX_EINVAL; - - *distance_items = 0; - struct diff_result dr; - int rc = cursor_diff(last, first, &dr); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(dr.diff == 0) && - F_ISSET(first->mc_db->md_flags & first->mc_db->md_flags, - MDBX_DUPSORT | C_INITIALIZED)) { - first = &first->mc_xcursor->mx_cursor; - last = &last->mc_xcursor->mx_cursor; - rc = cursor_diff(first, last, &dr); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - if (likely(dr.diff != 0)) - *distance_items = estimate(first->mc_db, &dr); - - return MDBX_SUCCESS; -} - -int mdbx_estimate_move(const MDBX_cursor *cursor, MDBX_val *key, MDBX_val *data, - MDBX_cursor_op move_op, ptrdiff_t *distance_items) { - if (unlikely(cursor == NULL || distance_items == NULL || - move_op == MDBX_GET_CURRENT || move_op == MDBX_GET_MULTIPLE)) - return MDBX_EINVAL; - - if (unlikely(cursor->mc_signature != MDBX_MC_SIGNATURE)) - return MDBX_EBADSIGN; - - int rc = check_txn(cursor->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (!(cursor->mc_flags & C_INITIALIZED)) - return MDBX_ENODATA; - - MDBX_cursor_couple next; - mdbx_cursor_copy(cursor, &next.outer); - next.outer.mc_xcursor = NULL; - if (cursor->mc_db->md_flags & MDBX_DUPSORT) { - next.outer.mc_xcursor = &next.inner; - rc = mdbx_xcursor_init0(&next.outer); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - MDBX_xcursor *mx = &container_of(cursor, MDBX_cursor_couple, outer)->inner; - mdbx_cursor_copy(&mx->mx_cursor, &next.inner.mx_cursor); - } - - MDBX_val stub = {0, 0}; - if (data == NULL) { - const unsigned mask = - 1 << MDBX_GET_BOTH | 1 << MDBX_GET_BOTH_RANGE | 1 << MDBX_SET_KEY; - if (unlikely(mask & (1 << move_op))) - return MDBX_EINVAL; - data = &stub; - } - - if (key == NULL) { - const unsigned mask = 1 << MDBX_GET_BOTH | 1 << MDBX_GET_BOTH_RANGE | - 1 << MDBX_SET_KEY | 1 << MDBX_SET | - 1 << MDBX_SET_RANGE; - if (unlikely(mask & (1 << move_op))) - return MDBX_EINVAL; - key = &stub; - } - - rc = mdbx_cursor_get(&next.outer, key, data, move_op); - if (unlikely(rc != MDBX_SUCCESS && - (rc != MDBX_NOTFOUND || !(next.outer.mc_flags & C_INITIALIZED)))) - return rc; - - return mdbx_estimate_distance(cursor, &next.outer, distance_items); -} - -static int mdbx_is_samedata(const MDBX_val *a, const MDBX_val *b) { - return a->iov_len == b->iov_len && - memcmp(a->iov_base, b->iov_base, a->iov_len) == 0; -} - -int mdbx_estimate_range(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *begin_key, - MDBX_val *begin_data, MDBX_val *end_key, - MDBX_val *end_data, ptrdiff_t *size_items) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!size_items)) - return MDBX_EINVAL; - - if (unlikely(begin_data && (begin_key == NULL || begin_key == MDBX_EPSILON))) - return MDBX_EINVAL; - - if (unlikely(end_data && (end_key == NULL || end_key == MDBX_EPSILON))) - return MDBX_EINVAL; - - if (unlikely(begin_key == MDBX_EPSILON && end_key == MDBX_EPSILON)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - MDBX_cursor_couple begin; - /* LY: first, initialize cursor to refresh a DB in case it have DB_STALE */ - rc = mdbx_cursor_init(&begin.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(begin.outer.mc_db->md_entries == 0)) { - *size_items = 0; - return MDBX_SUCCESS; - } - - if (!begin_key) { - if (unlikely(!end_key)) { - /* LY: FIRST..LAST case */ - *size_items = (ptrdiff_t)begin.outer.mc_db->md_entries; - return MDBX_SUCCESS; - } - MDBX_val stub = {0, 0}; - rc = mdbx_cursor_first(&begin.outer, &stub, &stub); - if (unlikely(end_key == MDBX_EPSILON)) { - /* LY: FIRST..+epsilon case */ - return (rc == MDBX_SUCCESS) - ? mdbx_cursor_count(&begin.outer, (size_t *)size_items) - : rc; - } - } else { - if (unlikely(begin_key == MDBX_EPSILON)) { - if (end_key == NULL) { - /* LY: -epsilon..LAST case */ - MDBX_val stub = {0, 0}; - rc = mdbx_cursor_last(&begin.outer, &stub, &stub); - return (rc == MDBX_SUCCESS) - ? mdbx_cursor_count(&begin.outer, (size_t *)size_items) - : rc; - } - /* LY: -epsilon..value case */ - assert(end_key != MDBX_EPSILON); - begin_key = end_key; - } else if (unlikely(end_key == MDBX_EPSILON)) { - /* LY: value..+epsilon case */ - assert(begin_key != MDBX_EPSILON); - end_key = begin_key; - } - if (end_key && !begin_data && !end_data && - (begin_key == end_key || mdbx_is_samedata(begin_key, end_key))) { - /* LY: single key case */ - int exact = 0; - rc = mdbx_cursor_set(&begin.outer, begin_key, NULL, MDBX_SET, &exact); - if (unlikely(rc != MDBX_SUCCESS)) { - *size_items = 0; - return (rc == MDBX_NOTFOUND) ? MDBX_SUCCESS : rc; - } - *size_items = 1; - if (begin.outer.mc_xcursor != NULL) { - MDBX_node *node = page_node(begin.outer.mc_pg[begin.outer.mc_top], - begin.outer.mc_ki[begin.outer.mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - /* LY: return the number of duplicates for given key */ - mdbx_tassert(txn, - begin.outer.mc_xcursor == &begin.inner && - (begin.inner.mx_cursor.mc_flags & C_INITIALIZED)); - *size_items = - (sizeof(*size_items) >= sizeof(begin.inner.mx_db.md_entries) || - begin.inner.mx_db.md_entries <= PTRDIFF_MAX) - ? (size_t)begin.inner.mx_db.md_entries - : PTRDIFF_MAX; - } - } - return MDBX_SUCCESS; - } else { - rc = mdbx_cursor_set(&begin.outer, begin_key, begin_data, - begin_data ? MDBX_GET_BOTH_RANGE : MDBX_SET_RANGE, - NULL); - } - } - - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc != MDBX_NOTFOUND || !(begin.outer.mc_flags & C_INITIALIZED)) - return rc; - } - - MDBX_cursor_couple end; - rc = mdbx_cursor_init(&end.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if (!end_key) { - MDBX_val stub = {0, 0}; - rc = mdbx_cursor_last(&end.outer, &stub, &stub); - } else { - rc = mdbx_cursor_set(&end.outer, end_key, end_data, - end_data ? MDBX_GET_BOTH_RANGE : MDBX_SET_RANGE, NULL); - } - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc != MDBX_NOTFOUND || !(end.outer.mc_flags & C_INITIALIZED)) - return rc; - } - - rc = mdbx_estimate_distance(&begin.outer, &end.outer, size_items); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - assert(*size_items >= -(ptrdiff_t)begin.outer.mc_db->md_entries && - *size_items <= (ptrdiff_t)begin.outer.mc_db->md_entries); - -#if 0 /* LY: Was decided to returns as-is (i.e. negative) the estimation \ - * results for an inverted ranges. */ - - /* Commit 8ddfd1f34ad7cf7a3c4aa75d2e248ca7e639ed63 - Change-Id: If59eccf7311123ab6384c4b93f9b1fed5a0a10d1 */ - - if (*size_items < 0) { - /* LY: inverted range case */ - *size_items += (ptrdiff_t)begin.outer.mc_db->md_entries; - } else if (*size_items == 0 && begin_key && end_key) { - int cmp = begin.outer.mc_dbx->md_cmp(&origin_begin_key, &origin_end_key); - if (cmp == 0 && (begin.inner.mx_cursor.mc_flags & C_INITIALIZED) && - begin_data && end_data) - cmp = begin.outer.mc_dbx->md_dcmp(&origin_begin_data, &origin_end_data); - if (cmp > 0) { - /* LY: inverted range case with empty scope */ - *size_items = (ptrdiff_t)begin.outer.mc_db->md_entries; - } - } - assert(*size_items >= 0 && - *size_items <= (ptrdiff_t)begin.outer.mc_db->md_entries); -#endif - - return MDBX_SUCCESS; -} - -//------------------------------------------------------------------------------ - -/* Позволяет обновить или удалить существующую запись с получением - * в old_data предыдущего значения данных. При этом если new_data равен - * нулю, то выполняется удаление, иначе обновление/вставка. - * - * Текущее значение может находиться в уже измененной (грязной) странице. - * В этом случае страница будет перезаписана при обновлении, а само старое - * значение утрачено. Поэтому исходно в old_data должен быть передан - * дополнительный буфер для копирования старого значения. - * Если переданный буфер слишком мал, то функция вернет -1, установив - * old_data->iov_len в соответствующее значение. - * - * Для не-уникальных ключей также возможен второй сценарий использования, - * когда посредством old_data из записей с одинаковым ключом для - * удаления/обновления выбирается конкретная. Для выбора этого сценария - * во flags следует одновременно указать MDBX_CURRENT и MDBX_NOOVERWRITE. - * Именно эта комбинация выбрана, так как она лишена смысла, и этим позволяет - * идентифицировать запрос такого сценария. - * - * Функция может быть замещена соответствующими операциями с курсорами - * после двух доработок (TODO): - * - внешняя аллокация курсоров, в том числе на стеке (без malloc). - * - получения статуса страницы по адресу (знать о P_DIRTY). - */ -int mdbx_replace(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *new_data, - MDBX_val *old_data, unsigned flags) { - int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!key || !old_data || old_data == new_data)) - return MDBX_EINVAL; - - if (unlikely(old_data->iov_base == NULL && old_data->iov_len)) - return MDBX_EINVAL; - - if (unlikely(new_data == NULL && !(flags & MDBX_CURRENT))) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(flags & ~(MDBX_NOOVERWRITE | MDBX_NODUPDATA | MDBX_RESERVE | - MDBX_APPEND | MDBX_APPENDDUP | MDBX_CURRENT))) - return MDBX_EINVAL; - - MDBX_cursor_couple cx; - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - cx.outer.mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = &cx.outer; - - MDBX_val present_key = *key; - if (F_ISSET(flags, MDBX_CURRENT | MDBX_NOOVERWRITE)) { - /* в old_data значение для выбора конкретного дубликата */ - if (unlikely(!(txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT))) { - rc = MDBX_EINVAL; - goto bailout; - } - - /* убираем лишний бит, он был признаком запрошенного режима */ - flags -= MDBX_NOOVERWRITE; - - rc = mdbx_cursor_get(&cx.outer, &present_key, old_data, MDBX_GET_BOTH); - if (rc != MDBX_SUCCESS) - goto bailout; - - if (new_data) { - /* обновление конкретного дубликата */ - if (mdbx_is_samedata(old_data, new_data)) - /* если данные совпадают, то ничего делать не надо */ - goto bailout; - } - } else { - /* в old_data буфер для сохранения предыдущего значения */ - if (unlikely(new_data && old_data->iov_base == new_data->iov_base)) - return MDBX_EINVAL; - MDBX_val present_data; - rc = mdbx_cursor_get(&cx.outer, &present_key, &present_data, MDBX_SET_KEY); - if (unlikely(rc != MDBX_SUCCESS)) { - old_data->iov_base = NULL; - old_data->iov_len = 0; - if (rc != MDBX_NOTFOUND || (flags & MDBX_CURRENT)) - goto bailout; - } else if (flags & MDBX_NOOVERWRITE) { - rc = MDBX_KEYEXIST; - *old_data = present_data; - goto bailout; - } else { - MDBX_page *page = cx.outer.mc_pg[cx.outer.mc_top]; - if (txn->mt_dbs[dbi].md_flags & MDBX_DUPSORT) { - if (flags & MDBX_CURRENT) { - /* для не-уникальных ключей позволяем update/delete только если ключ - * один */ - MDBX_node *node = page_node(page, cx.outer.mc_ki[cx.outer.mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - mdbx_tassert(txn, XCURSOR_INITED(&cx.outer) && - cx.outer.mc_xcursor->mx_db.md_entries > 1); - if (cx.outer.mc_xcursor->mx_db.md_entries > 1) { - rc = MDBX_EMULTIVAL; - goto bailout; - } - } - /* если данные совпадают, то ничего делать не надо */ - if (new_data && mdbx_is_samedata(&present_data, new_data)) { - *old_data = *new_data; - goto bailout; - } - /* В оригинальной LMDB флажок MDBX_CURRENT здесь приведет - * к замене данных без учета MDBX_DUPSORT сортировки, - * но здесь это в любом случае допустимо, так как мы - * проверили что для ключа есть только одно значение. */ - } else if ((flags & MDBX_NODUPDATA) && - mdbx_is_samedata(&present_data, new_data)) { - /* если данные совпадают и установлен MDBX_NODUPDATA */ - rc = MDBX_KEYEXIST; - goto bailout; - } - } else { - /* если данные совпадают, то ничего делать не надо */ - if (new_data && mdbx_is_samedata(&present_data, new_data)) { - *old_data = *new_data; - goto bailout; - } - flags |= MDBX_CURRENT; - } - - if (IS_DIRTY(page)) { - if (unlikely(old_data->iov_len < present_data.iov_len)) { - old_data->iov_base = NULL; - old_data->iov_len = present_data.iov_len; - rc = MDBX_RESULT_TRUE; - goto bailout; - } - memcpy(old_data->iov_base, present_data.iov_base, present_data.iov_len); - old_data->iov_len = present_data.iov_len; - } else { - *old_data = present_data; - } - } - } - - if (likely(new_data)) - rc = mdbx_cursor_put(&cx.outer, key, new_data, flags); - else - rc = mdbx_cursor_del(&cx.outer, 0); - -bailout: - txn->mt_cursors[dbi] = cx.outer.mc_next; - return rc; -} - -/* Функция сообщает находится ли указанный адрес в "грязной" странице у - * заданной пишущей транзакции. В конечном счете это позволяет избавиться от - * лишнего копирования данных из НЕ-грязных страниц. - * - * "Грязные" страницы - это те, которые уже были изменены в ходе пишущей - * транзакции. Соответственно, какие-либо дальнейшие изменения могут привести - * к перезаписи таких страниц. Поэтому все функции, выполняющие изменения, в - * качестве аргументов НЕ должны получать указатели на данные в таких - * страницах. В свою очередь "НЕ грязные" страницы перед модификацией будут - * скопированы. - * - * Другими словами, данные из "грязных" страниц должны быть либо скопированы - * перед передачей в качестве аргументов для дальнейших модификаций, либо - * отвергнуты на стадии проверки корректности аргументов. - * - * Таким образом, функция позволяет как избавиться от лишнего копирования, - * так и выполнить более полную проверку аргументов. - * - * ВАЖНО: Передаваемый указатель должен указывать на начало данных. Только - * так гарантируется что актуальный заголовок страницы будет физически - * расположен в той-же странице памяти, в том числе для многостраничных - * P_OVERFLOW страниц с длинными данными. */ -int mdbx_is_dirty(const MDBX_txn *txn, const void *ptr) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (txn->mt_flags & MDBX_RDONLY) - return MDBX_RESULT_FALSE; - - const MDBX_env *env = txn->mt_env; - const ptrdiff_t offset = (uint8_t *)ptr - env->me_map; - if (offset >= 0) { - const pgno_t pgno = bytes2pgno(env, offset); - if (likely(pgno < txn->mt_next_pgno)) { - const MDBX_page *page = pgno2page(env, pgno); - if (unlikely(page->mp_pgno != pgno)) { - /* The ptr pointed into middle of a large page, - * not to the beginning of a data. */ - return MDBX_EINVAL; - } - if (unlikely(page->mp_flags & (P_DIRTY | P_LOOSE | P_KEEP))) - return MDBX_RESULT_TRUE; - if (likely(txn->tw.spill_pages == nullptr)) - return MDBX_RESULT_FALSE; - return mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1) ? MDBX_RESULT_TRUE - : MDBX_RESULT_FALSE; - } - if ((size_t)offset < env->me_dxb_mmap.limit) { - /* Указатель адресует что-то в пределах mmap, но за границей - * распределенных страниц. Такое может случится если mdbx_is_dirty() - * вызывает после операции, в ходе которой гразная страница попала - * в loose и затем была возвращена в нераспределенное пространство. */ - return MDBX_RESULT_TRUE; - } - } - - /* Страница вне используемого mmap-диапазона, т.е. либо в функцию был - * передан некорректный адрес, либо адрес в теневой странице, которая была - * выделена посредством malloc(). - * - * Для WRITE_MAP режима такая страница однозначно "не грязная", - * а для режимов без WRITE_MAP следует просматривать списки dirty - * и spilled страниц у каких-либо транзакций (в том числе дочерних). - * - * Поэтому для WRITE_MAP возвращаем false, а для остальных режимов - * всегда true. Такая логика имеет ряд преимуществ: - * - не тратим время на просмотр списков; - * - результат всегда безопасен (может быть ложно-положительным, - * но не ложно-отрицательным); - * - результат не зависит от вложенности транзакций и от относительного - * положения переданной транзакции в этой рекурсии. */ - return (env->me_flags & MDBX_WRITEMAP) ? MDBX_RESULT_FALSE : MDBX_RESULT_TRUE; -} - -int mdbx_dbi_sequence(MDBX_txn *txn, MDBX_dbi dbi, uint64_t *result, - uint64_t increment) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) - return MDBX_BAD_DBI; - - if (unlikely(txn->mt_dbflags[dbi] & DB_STALE)) { - rc = mdbx_fetch_sdb(txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - MDBX_db *dbs = &txn->mt_dbs[dbi]; - if (likely(result)) - *result = dbs->md_seq; - - if (likely(increment > 0)) { - if (unlikely(txn->mt_flags & MDBX_RDONLY)) - return MDBX_EACCESS; - - uint64_t new = dbs->md_seq + increment; - if (unlikely(new < increment)) - return MDBX_RESULT_TRUE; - - mdbx_tassert(txn, new > dbs->md_seq); - dbs->md_seq = new; - txn->mt_flags |= MDBX_TXN_DIRTY; - txn->mt_dbflags[dbi] |= DB_DIRTY; - } - - return MDBX_SUCCESS; -} - -/*----------------------------------------------------------------------------*/ - -__cold intptr_t mdbx_limits_dbsize_min(intptr_t pagesize) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_syspagesize(); - else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - return MIN_PAGENO * pagesize; -} - -__cold intptr_t mdbx_limits_dbsize_max(intptr_t pagesize) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_syspagesize(); - else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - const uint64_t limit = MAX_PAGENO * (uint64_t)pagesize; - return (limit < (intptr_t)MAX_MAPSIZE) ? (intptr_t)limit - : (intptr_t)MAX_MAPSIZE; -} - -__cold intptr_t mdbx_limits_txnsize_max(intptr_t pagesize) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_syspagesize(); - else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - const uint64_t limit = pagesize * (uint64_t)(MDBX_DPL_TXNFULL - 1); - return (limit < (intptr_t)MAX_MAPSIZE) ? (intptr_t)limit - : (intptr_t)MAX_MAPSIZE; -} - -/*** Key-making functions to avoid custom comparators *************************/ - -static __always_inline uint64_t double2key(const double *const ptr) { - STATIC_ASSERT(sizeof(double) == sizeof(int64_t)); - const int64_t i64 = *(const int64_t *)ptr; - return (i64 >= 0) ? /* positive */ UINT64_C(0x8000000000000000) + i64 - : /* negative */ (uint64_t)-i64; -} - -static __always_inline uint32_t float2key(const float *const ptr) { - STATIC_ASSERT(sizeof(float) == sizeof(int32_t)); - const int32_t i32 = *(const int32_t *)ptr; - return (i32 >= 0) ? /* positive */ UINT32_C(0x80000000) + i32 - : /* negative */ (uint32_t)-i32; -} - -uint64_t mdbx_key_from_double(const double ieee754_64bit) { - return double2key(&ieee754_64bit); -} - -uint64_t mdbx_key_from_ptrdouble(const double *const ieee754_64bit) { - return double2key(ieee754_64bit); -} - -uint32_t mdbx_key_from_float(const float ieee754_32bit) { - return float2key(&ieee754_32bit); -} - -uint32_t mdbx_key_from_ptrfloat(const float *const ieee754_32bit) { - return float2key(ieee754_32bit); -} - -#define IEEE754_DOUBLE_MANTISSA_SIZE 52 -#define IEEE754_DOUBLE_BIAS 0x3FF -#define IEEE754_DOUBLE_MAX 0x7FF -#define IEEE754_DOUBLE_IMPLICIT_LEAD UINT64_C(0x0010000000000000) -#define IEEE754_DOUBLE_MANTISSA_MASK UINT64_C(0x000FFFFFFFFFFFFF) -#define IEEE754_DOUBLE_MANTISSA_AMAX UINT64_C(0x001FFFFFFFFFFFFF) - -static __inline int clz64(uint64_t value) { -#if __GNUC_PREREQ(4, 1) || __has_builtin(__builtin_clzl) - if (sizeof(value) == sizeof(int)) - return __builtin_clz(value); - if (sizeof(value) == sizeof(long)) - return __builtin_clzl(value); -#if (defined(__SIZEOF_LONG_LONG__) && __SIZEOF_LONG_LONG__ == 8) || \ - __has_builtin(__builtin_clzll) - return __builtin_clzll(value); -#endif /* have(long long) && long long == uint64_t */ -#endif /* GNU C */ - -#if defined(_MSC_VER) - unsigned long index; -#if defined(_M_AMD64) || defined(_M_ARM64) || defined(_M_X64) - _BitScanReverse64(&index, value); - return 63 - index; -#else - if (value > UINT32_MAX) { - _BitScanReverse(&index, (uint32_t)(value >> 32)); - return 31 - index; - } - _BitScanReverse(&index, (uint32_t)value); - return 63 - index; -#endif -#endif /* MSVC */ - - value |= value >> 1; - value |= value >> 2; - value |= value >> 4; - value |= value >> 8; - value |= value >> 16; - value |= value >> 32; - static const uint8_t debruijn_clz64[64] = { - 63, 16, 62, 7, 15, 36, 61, 3, 6, 14, 22, 26, 35, 47, 60, 2, - 9, 5, 28, 11, 13, 21, 42, 19, 25, 31, 34, 40, 46, 52, 59, 1, - 17, 8, 37, 4, 23, 27, 48, 10, 29, 12, 43, 20, 32, 41, 53, 18, - 38, 24, 49, 30, 44, 33, 54, 39, 50, 45, 55, 51, 56, 57, 58, 0}; - return debruijn_clz64[value * UINT64_C(0x03F79D71B4CB0A89) >> 58]; -} - -static uint64_t round_mantissa(const uint64_t u64, int shift) { - assert(shift < 0 && u64 > 0); - shift = -shift; - const unsigned half = 1 << (shift - 1); - const unsigned lsb = 1 & (unsigned)(u64 >> shift); - const unsigned tie2even = 1 ^ lsb; - return (u64 + half - tie2even) >> shift; -} - -uint64_t mdbx_key_from_jsonInteger(const int64_t json_integer) { - const uint64_t biased_zero = UINT64_C(0x8000000000000000); - if (json_integer > 0) { - const uint64_t u64 = json_integer; - int shift = clz64(u64) - (64 - IEEE754_DOUBLE_MANTISSA_SIZE - 1); - uint64_t mantissa = u64 << shift; - if (unlikely(shift < 0)) { - mantissa = round_mantissa(u64, shift); - if (mantissa > IEEE754_DOUBLE_MANTISSA_AMAX) - mantissa = round_mantissa(u64, --shift); - } - - assert(mantissa >= IEEE754_DOUBLE_IMPLICIT_LEAD && - mantissa <= IEEE754_DOUBLE_MANTISSA_AMAX); - const uint64_t exponent = - IEEE754_DOUBLE_BIAS + IEEE754_DOUBLE_MANTISSA_SIZE - shift; - assert(exponent > 0 && exponent <= IEEE754_DOUBLE_MAX); - const uint64_t key = biased_zero + - (exponent << IEEE754_DOUBLE_MANTISSA_SIZE) + - (mantissa - IEEE754_DOUBLE_IMPLICIT_LEAD); -#if !defined(_MSC_VER) || \ - defined( \ - _DEBUG) /* Workaround for MSVC error LNK2019: unresolved external \ - symbol __except1 referenced in function __ftol3_except */ - assert(key == mdbx_key_from_double((double)json_integer)); -#endif /* Workaround for MSVC */ - return key; - } - - if (json_integer < 0) { - const uint64_t u64 = -json_integer; - int shift = clz64(u64) - (64 - IEEE754_DOUBLE_MANTISSA_SIZE - 1); - uint64_t mantissa = u64 << shift; - if (unlikely(shift < 0)) { - mantissa = round_mantissa(u64, shift); - if (mantissa > IEEE754_DOUBLE_MANTISSA_AMAX) - mantissa = round_mantissa(u64, --shift); - } - - assert(mantissa >= IEEE754_DOUBLE_IMPLICIT_LEAD && - mantissa <= IEEE754_DOUBLE_MANTISSA_AMAX); - const uint64_t exponent = - IEEE754_DOUBLE_BIAS + IEEE754_DOUBLE_MANTISSA_SIZE - shift; - assert(exponent > 0 && exponent <= IEEE754_DOUBLE_MAX); - const uint64_t key = biased_zero - - (exponent << IEEE754_DOUBLE_MANTISSA_SIZE) - - (mantissa - IEEE754_DOUBLE_IMPLICIT_LEAD); -#if !defined(_MSC_VER) || \ - defined( \ - _DEBUG) /* Workaround for MSVC error LNK2019: unresolved external \ - symbol __except1 referenced in function __ftol3_except */ - assert(key == mdbx_key_from_double((double)json_integer)); -#endif /* Workaround for MSVC */ - return key; - } - - return biased_zero; -} - -/*** Attribute support functions for Nexenta **********************************/ -#ifdef MDBX_NEXENTA_ATTRS - -static __inline int mdbx_attr_peek(MDBX_val *data, mdbx_attr_t *attrptr) { - if (unlikely(data->iov_len < sizeof(mdbx_attr_t))) - return MDBX_INCOMPATIBLE; - - if (likely(attrptr != NULL)) - *attrptr = *(mdbx_attr_t *)data->iov_base; - data->iov_len -= sizeof(mdbx_attr_t); - data->iov_base = - likely(data->iov_len > 0) ? ((mdbx_attr_t *)data->iov_base) + 1 : NULL; - - return MDBX_SUCCESS; -} - -static __inline int mdbx_attr_poke(MDBX_val *reserved, MDBX_val *data, - mdbx_attr_t attr, unsigned flags) { - mdbx_attr_t *space = reserved->iov_base; - if (flags & MDBX_RESERVE) { - if (likely(data != NULL)) { - data->iov_base = data->iov_len ? space + 1 : NULL; - } - } else { - *space = attr; - if (likely(data != NULL)) { - memcpy(space + 1, data->iov_base, data->iov_len); - } - } - - return MDBX_SUCCESS; -} - -int mdbx_cursor_get_attr(MDBX_cursor *mc, MDBX_val *key, MDBX_val *data, - mdbx_attr_t *attrptr, MDBX_cursor_op op) { - int rc = mdbx_cursor_get(mc, key, data, op); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - return mdbx_attr_peek(data, attrptr); -} - -int mdbx_get_attr(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, - uint64_t *attrptr) { - int rc = mdbx_get(txn, dbi, key, data); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - return mdbx_attr_peek(data, attrptr); -} - -int mdbx_put_attr(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, - mdbx_attr_t attr, unsigned flags) { - MDBX_val reserve; - reserve.iov_base = NULL; - reserve.iov_len = (data ? data->iov_len : 0) + sizeof(mdbx_attr_t); - - int rc = mdbx_put(txn, dbi, key, &reserve, flags | MDBX_RESERVE); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - return mdbx_attr_poke(&reserve, data, attr, flags); -} - -int mdbx_cursor_put_attr(MDBX_cursor *cursor, MDBX_val *key, MDBX_val *data, - mdbx_attr_t attr, unsigned flags) { - MDBX_val reserve; - reserve.iov_base = NULL; - reserve.iov_len = (data ? data->iov_len : 0) + sizeof(mdbx_attr_t); - - int rc = mdbx_cursor_put(cursor, key, &reserve, flags | MDBX_RESERVE); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - return mdbx_attr_poke(&reserve, data, attr, flags); -} - -int mdbx_set_attr(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, MDBX_val *data, - mdbx_attr_t attr) { - if (unlikely(!key || !txn)) - return MDBX_EINVAL; - - if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) - return MDBX_VERSION_MISMATCH; - - if (unlikely(!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))) - return MDBX_EINVAL; - - if (unlikely(txn->mt_flags & (MDBX_RDONLY | MDBX_TXN_BLOCKED))) - return (txn->mt_flags & MDBX_RDONLY) ? MDBX_EACCESS : MDBX_BAD_TXN; - - MDBX_cursor_couple cx; - MDBX_val old_data; - int rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_set(&cx.outer, key, &old_data, MDBX_SET, NULL); - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc == MDBX_NOTFOUND && data) { - cx.outer.mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = &cx.outer; - rc = mdbx_cursor_put_attr(&cx.outer, key, data, attr, 0); - txn->mt_cursors[dbi] = cx.outer.mc_next; - } - return rc; - } - - mdbx_attr_t old_attr = 0; - rc = mdbx_attr_peek(&old_data, &old_attr); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (old_attr == attr && (!data || (data->iov_len == old_data.iov_len && - memcmp(data->iov_base, old_data.iov_base, - old_data.iov_len) == 0))) - return MDBX_SUCCESS; - - cx.outer.mc_next = txn->mt_cursors[dbi]; - txn->mt_cursors[dbi] = &cx.outer; - rc = mdbx_cursor_put_attr(&cx.outer, key, data ? data : &old_data, attr, - MDBX_CURRENT); - txn->mt_cursors[dbi] = cx.outer.mc_next; - return rc; -} -#endif /* MDBX_NEXENTA_ATTRS */ - -/******************************************************************************/ -/* *INDENT-OFF* */ -/* clang-format off */ - -__dll_export -#ifdef __attribute_used__ - __attribute_used__ -#elif defined(__GNUC__) || __has_attribute(__used__) - __attribute__((__used__)) -#endif -#ifdef __attribute_externally_visible__ - __attribute_externally_visible__ -#elif (defined(__GNUC__) && !defined(__clang__)) || \ - __has_attribute(__externally_visible__) - __attribute__((__externally_visible__)) -#endif - const mdbx_build_info mdbx_build = { -#ifdef MDBX_BUILD_TIMESTAMP - MDBX_BUILD_TIMESTAMP -#else - __DATE__ " " __TIME__ -#endif /* MDBX_BUILD_TIMESTAMP */ - - , -#ifdef MDBX_BUILD_TARGET - MDBX_BUILD_TARGET -#else - #if defined(__ANDROID__) - "Android" - #elif defined(__linux__) || defined(__gnu_linux__) - "Linux" - #elif defined(EMSCRIPTEN) || defined(__EMSCRIPTEN__) - "webassembly" - #elif defined(__CYGWIN__) - "CYGWIN" - #elif defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) \ - || defined(__WINDOWS__) - "Windows" - #elif defined(__APPLE__) - #if (defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE) \ - || (defined(TARGET_IPHONE_SIMULATOR) && TARGET_IPHONE_SIMULATOR) - "iOS" - #else - "MacOS" - #endif - #elif defined(__FreeBSD__) - "FreeBSD" - #elif defined(__DragonFly__) - "DragonFlyBSD" - #elif defined(__NetBSD__) - "NetBSD" - #elif defined(__OpenBSD__) - "OpenBSD" - #elif defined(__bsdi__) - "UnixBSDI" - #elif defined(__MACH__) - "MACH" - #elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) - "HPUX" - #elif defined(_AIX) - "AIX" - #elif defined(__sun) && defined(__SVR4) - "Solaris" - #elif defined(__BSD__) || defined(BSD) - "UnixBSD" - #elif defined(__unix__) || defined(UNIX) || defined(__unix) \ - || defined(__UNIX) || defined(__UNIX__) - "UNIX" - #elif defined(_POSIX_VERSION) - "POSIX" STRINGIFY(_POSIX_VERSION) - #else - "UnknownOS" - #endif /* Target OS */ - - "-" - - #if defined(__amd64__) - "AMD64" - #elif defined(__ia32__) - "IA32" - #elif defined(__e2k__) || defined(__elbrus__) - "Elbrus" - #elif defined(__alpha__) || defined(__alpha) || defined(_M_ALPHA) - "Alpha" - #elif defined(__aarch64__) || defined(_M_ARM64) - "ARM64" - #elif defined(__arm__) || defined(__thumb__) || defined(__TARGET_ARCH_ARM) \ - || defined(__TARGET_ARCH_THUMB) || defined(_ARM) || defined(_M_ARM) \ - || defined(_M_ARMT) || defined(__arm) - "ARM" - #elif defined(__mips64) || defined(__mips64__) || (defined(__mips) && (__mips >= 64)) - "MIPS64" - #elif if defined(__mips__) || defined(__mips) || defined(_R4000) || defined(__MIPS__) - "MIPS" - #elif defined(__hppa64__) || defined(__HPPA64__) || defined(__hppa64) - "PARISC64" - #elif defined(__hppa__) || defined(__HPPA__) || defined(__hppa) - "PARISC" - #elif defined(__ia64__) || defined(__ia64) || defined(_IA64) \ - || defined(__IA64__) || defined(_M_IA64) || defined(__itanium__) - "Itanium" - #elif defined(__powerpc64__) || defined(__ppc64__) || defined(__ppc64) \ - || defined(__powerpc64) || defined(_ARCH_PPC64) - "PowerPC64" - #elif defined(__powerpc__) || defined(__ppc__) || defined(__powerpc) \ - || defined(__ppc) || defined(_ARCH_PPC) || defined(__PPC__) || defined(__POWERPC__) - "PowerPC" - #elif defined(__sparc64__) || defined(__sparc64) - "SPARC64" - #elif defined(__sparc__) || defined(__sparc) - "SPARC" - #elif defined(__s390__) || defined(__s390) || defined(__zarch__) || defined(__zarch) - "S390" - #else - "UnknownARCH" - #endif -#endif /* MDBX_BUILD_TARGET */ - -#ifdef MDBX_BUILD_CONFIG -# if defined(_MSC_VER) -# pragma message("Configuration-depended MDBX_BUILD_CONFIG: " MDBX_BUILD_CONFIG) -# endif - "-" MDBX_BUILD_CONFIG -#endif /* MDBX_BUILD_CONFIG */ - , - "MDBX_DEBUG=" STRINGIFY(MDBX_DEBUG) -#ifdef MDBX_LOGLEVEL_BUILD - " MDBX_LOGLEVEL_BUILD=" STRINGIFY(MDBX_LOGLEVEL_BUILD) -#endif /* MDBX_LOGLEVEL_BUILD */ - " MDBX_WORDBITS=" STRINGIFY(MDBX_WORDBITS) - " BYTE_ORDER=" -#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - "LITTLE_ENDIAN" -#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - "BIG_ENDIAN" -#else - #error "FIXME: Unsupported byte order" -#endif /* __BYTE_ORDER__ */ - " MDBX_TXN_CHECKPID=" MDBX_TXN_CHECKPID_CONFIG - " MDBX_TXN_CHECKOWNER=" MDBX_TXN_CHECKOWNER_CONFIG - " MDBX_64BIT_ATOMIC=" MDBX_64BIT_ATOMIC_CONFIG - " MDBX_64BIT_CAS=" MDBX_64BIT_CAS_CONFIG - " MDBX_TRUST_RTC=" MDBX_TRUST_RTC_CONFIG -#ifdef __SANITIZE_ADDRESS__ - " SANITIZE_ADDRESS=YES" -#endif /* __SANITIZE_ADDRESS__ */ -#ifdef MDBX_USE_VALGRIND - " MDBX_USE_VALGRIND=YES" -#endif /* MDBX_USE_VALGRIND */ -#ifdef MDBX_FORCE_ASSERTIONS - " MDBX_FORCE_ASSERTIONS=YES" -#endif /* MDBX_FORCE_ASSERTIONS */ -#ifdef _GNU_SOURCE - " _GNU_SOURCE=YES" -#else - " _GNU_SOURCE=NO" -#endif /* _GNU_SOURCE */ -#ifdef __APPLE__ - " MDBX_OSX_SPEED_INSTEADOF_DURABILITY=" STRINGIFY(MDBX_OSX_SPEED_INSTEADOF_DURABILITY) -#endif /* MacOS */ -#if defined(_WIN32) || defined(_WIN64) - " MDBX_AVOID_CRT=" STRINGIFY(MDBX_AVOID_CRT) - " MDBX_CONFIG_MANUAL_TLS_CALLBACK=" STRINGIFY(MDBX_CONFIG_MANUAL_TLS_CALLBACK) - " MDBX_BUILD_SHARED_LIBRARY=" STRINGIFY(MDBX_BUILD_SHARED_LIBRARY) - " WINVER=" STRINGIFY(WINVER) -#else /* Windows */ - " MDBX_LOCKING=" MDBX_LOCKING_CONFIG - " MDBX_USE_OFDLOCKS=" MDBX_USE_OFDLOCKS_CONFIG -#endif /* !Windows */ - " MDBX_CACHELINE_SIZE=" STRINGIFY(MDBX_CACHELINE_SIZE) - " MDBX_CPU_WRITEBACK_INCOHERENT=" STRINGIFY(MDBX_CPU_WRITEBACK_INCOHERENT) - " MDBX_MMAP_INCOHERENT_CPU_CACHE=" STRINGIFY(MDBX_MMAP_INCOHERENT_CPU_CACHE) - " MDBX_MMAP_INCOHERENT_FILE_WRITE=" STRINGIFY(MDBX_MMAP_INCOHERENT_FILE_WRITE) - " MDBX_UNALIGNED_OK=" STRINGIFY(MDBX_UNALIGNED_OK) - " MDBX_PNL_ASCENDING=" STRINGIFY(MDBX_PNL_ASCENDING) - , -#ifdef MDBX_BUILD_COMPILER - MDBX_BUILD_COMPILER -#else - #ifdef __INTEL_COMPILER - "Intel C/C++ " STRINGIFY(__INTEL_COMPILER) - #elsif defined(__apple_build_version__) - "Apple clang " STRINGIFY(__apple_build_version__) - #elif defined(__ibmxl__) - "IBM clang C " STRINGIFY(__ibmxl_version__) "." STRINGIFY(__ibmxl_release__) - "." STRINGIFY(__ibmxl_modification__) "." STRINGIFY(__ibmxl_ptf_fix_level__) - #elif defined(__clang__) - "clang " STRINGIFY(__clang_version__) - #elif defined(__MINGW64__) - "MINGW-64 " STRINGIFY(__MINGW64_MAJOR_VERSION) "." STRINGIFY(__MINGW64_MINOR_VERSION) - #elif defined(__MINGW32__) - "MINGW-32 " STRINGIFY(__MINGW32_MAJOR_VERSION) "." STRINGIFY(__MINGW32_MINOR_VERSION) - #elif defined(__IBMC__) - "IBM C " STRINGIFY(__IBMC__) - #elif defined(__GNUC__) - "GNU C/C++ " - #ifdef __VERSION__ - __VERSION__ - #else - STRINGIFY(__GNUC__) "." STRINGIFY(__GNUC_MINOR__) "." STRINGIFY(__GNUC_PATCHLEVEL__) - #endif - #elif defined(_MSC_VER) - "MSVC " STRINGIFY(_MSC_FULL_VER) "-" STRINGIFY(_MSC_BUILD) - #else - "Unknown compiler" - #endif -#endif /* MDBX_BUILD_COMPILER */ - , -#ifdef MDBX_BUILD_FLAGS - MDBX_BUILD_FLAGS -#endif /* MDBX_BUILD_FLAGS */ -#ifdef MDBX_BUILD_FLAGS_CONFIG - MDBX_BUILD_FLAGS_CONFIG -#endif /* MDBX_BUILD_FLAGS_CONFIG */ -}; - -#ifdef __SANITIZE_ADDRESS__ -LIBMDBX_API __attribute__((__weak__)) const char *__asan_default_options() { - return "symbolize=1:allow_addr2line=1:" -#ifdef _DEBUG - "debug=1:" -#endif /* _DEBUG */ - "report_globals=1:" - "replace_str=1:replace_intrin=1:" - "malloc_context_size=9:" - "detect_leaks=1:" - "check_printf=1:" - "detect_deadlocks=1:" -#ifndef LTO_ENABLED - "check_initialization_order=1:" -#endif - "detect_stack_use_after_return=1:" - "intercept_tls_get_addr=1:" - "decorate_proc_maps=1:" - "abort_on_error=1"; -} -#endif /* __SANITIZE_ADDRESS__ */ - -/* *INDENT-ON* */ -/* clang-format on */ diff --git a/libs/libmdbx/src/src/elements/debug_begin.h b/libs/libmdbx/src/src/elements/debug_begin.h deleted file mode 100644 index f3306b5dc0..0000000000 --- a/libs/libmdbx/src/src/elements/debug_begin.h +++ /dev/null @@ -1,34 +0,0 @@ -#pragma push_macro("mdbx_trace") -#pragma push_macro("mdbx_debug") -#pragma push_macro("mdbx_verbose") -#pragma push_macro("mdbx_notice") -#pragma push_macro("mdbx_warning") -#pragma push_macro("mdbx_error") -#pragma push_macro("mdbx_assert") - -#undef mdbx_trace -#define mdbx_trace(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_TRACE, __func__, __LINE__, fmt "\n", __VA_ARGS__) - -#undef mdbx_debug -#define mdbx_debug(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_DEBUG, __func__, __LINE__, fmt "\n", __VA_ARGS__) - -#undef mdbx_verbose -#define mdbx_verbose(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_VERBOSE, __func__, __LINE__, fmt "\n", __VA_ARGS__) - -#undef mdbx_notice -#define mdbx_notice(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_NOTICE, __func__, __LINE__, fmt "\n", __VA_ARGS__) - -#undef mdbx_warning -#define mdbx_warning(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_WARN, __func__, __LINE__, fmt "\n", __VA_ARGS__) - -#undef mdbx_error -#define mdbx_error(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, fmt "\n", __VA_ARGS__) - -#undef mdbx_assert -#define mdbx_assert(env, expr) mdbx_ensure(env, expr) diff --git a/libs/libmdbx/src/src/elements/debug_end.h b/libs/libmdbx/src/src/elements/debug_end.h deleted file mode 100644 index e361119bc0..0000000000 --- a/libs/libmdbx/src/src/elements/debug_end.h +++ /dev/null @@ -1,7 +0,0 @@ -#pragma pop_macro("mdbx_trace") -#pragma pop_macro("mdbx_debug") -#pragma pop_macro("mdbx_verbose") -#pragma pop_macro("mdbx_notice") -#pragma pop_macro("mdbx_warning") -#pragma pop_macro("mdbx_error") -#pragma pop_macro("mdbx_assert") diff --git a/libs/libmdbx/src/src/elements/defs.h b/libs/libmdbx/src/src/elements/defs.h deleted file mode 100644 index b2710eede8..0000000000 --- a/libs/libmdbx/src/src/elements/defs.h +++ /dev/null @@ -1,425 +0,0 @@ -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#pragma once -/* *INDENT-OFF* */ -/* clang-format off */ - -#ifndef __GNUC_PREREQ -# if defined(__GNUC__) && defined(__GNUC_MINOR__) -# define __GNUC_PREREQ(maj, min) \ - ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) -# else -# define __GNUC_PREREQ(maj, min) (0) -# endif -#endif /* __GNUC_PREREQ */ - -#ifndef __CLANG_PREREQ -# ifdef __clang__ -# define __CLANG_PREREQ(maj,min) \ - ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min)) -# else -# define __CLANG_PREREQ(maj,min) (0) -# endif -#endif /* __CLANG_PREREQ */ - -#ifndef __GLIBC_PREREQ -# if defined(__GLIBC__) && defined(__GLIBC_MINOR__) -# define __GLIBC_PREREQ(maj, min) \ - ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min)) -# else -# define __GLIBC_PREREQ(maj, min) (0) -# endif -#endif /* __GLIBC_PREREQ */ - -#ifndef __has_attribute -# define __has_attribute(x) (0) -#endif - -#ifndef __has_feature -# define __has_feature(x) (0) -#endif - -#ifndef __has_extension -# define __has_extension(x) (0) -#endif - -#ifndef __has_builtin -# define __has_builtin(x) (0) -#endif - -#ifndef __has_warning -# define __has_warning(x) (0) -#endif - -#ifndef __has_include -# define __has_include(x) (0) -#endif - -#if __has_feature(thread_sanitizer) -# define __SANITIZE_THREAD__ 1 -#endif - -#if __has_feature(address_sanitizer) -# define __SANITIZE_ADDRESS__ 1 -#endif - -/*----------------------------------------------------------------------------*/ - -#ifndef __extern_C -# ifdef __cplusplus -# define __extern_C extern "C" -# else -# define __extern_C -# endif -#endif /* __extern_C */ - -#ifndef __cplusplus -# ifndef bool -# define bool _Bool -# endif -# ifndef true -# define true (1) -# endif -# ifndef false -# define false (0) -# endif -#endif - -#if !defined(nullptr) && !defined(__cplusplus) || (__cplusplus < 201103L && !defined(_MSC_VER)) -# define nullptr NULL -#endif - -/*----------------------------------------------------------------------------*/ - -#ifndef __always_inline -# if defined(__GNUC__) || __has_attribute(__always_inline__) -# define __always_inline __inline __attribute__((__always_inline__)) -# elif defined(_MSC_VER) -# define __always_inline __forceinline -# else -# define __always_inline -# endif -#endif /* __always_inline */ - -#ifndef __noinline -# if defined(__GNUC__) || __has_attribute(__noinline__) -# define __noinline __attribute__((__noinline__)) -# elif defined(_MSC_VER) -# define __noinline __declspec(noinline) -# else -# define __noinline -# endif -#endif /* __noinline */ - -#ifndef __must_check_result -# if defined(__GNUC__) || __has_attribute(__warn_unused_result__) -# define __must_check_result __attribute__((__warn_unused_result__)) -# else -# define __must_check_result -# endif -#endif /* __must_check_result */ - -#ifndef __maybe_unused -# if defined(__GNUC__) || __has_attribute(__unused__) -# define __maybe_unused __attribute__((__unused__)) -# else -# define __maybe_unused -# endif -#endif /* __maybe_unused */ - -#if !defined(__noop) && !defined(_MSC_VER) -# define __noop(...) do {} while(0) -#endif /* __noop */ - -#ifndef __fallthrough -# if __GNUC_PREREQ(7, 0) || __has_attribute(__fallthrough__) -# define __fallthrough __attribute__((__fallthrough__)) -# else -# define __fallthrough __noop() -# endif -#endif /* __fallthrough */ - -#ifndef __unreachable -# if __GNUC_PREREQ(4,5) || __has_builtin(__builtin_unreachable) -# define __unreachable() __builtin_unreachable() -# elif defined(_MSC_VER) -# define __unreachable() __assume(0) -# else -# define __unreachable() __noop() -# endif -#endif /* __unreachable */ - -#ifndef __prefetch -# if defined(__GNUC__) || defined(__clang__) || __has_builtin(__builtin_prefetch) -# define __prefetch(ptr) __builtin_prefetch(ptr) -# else -# define __prefetch(ptr) __noop(ptr) -# endif -#endif /* __prefetch */ - -#ifndef __noreturn -# if defined(__GNUC__) || __has_attribute(__noreturn__) -# define __noreturn __attribute__((__noreturn__)) -# elif defined(_MSC_VER) -# define __noreturn __declspec(noreturn) -# else -# define __noreturn -# endif -#endif /* __noreturn */ - -#ifndef __nothrow -# if defined(__cplusplus) -# if __cplusplus < 201703L -# define __nothrow throw() -# else -# define __nothrow noexcept(true) -# endif /* __cplusplus */ -# elif defined(__GNUC__) || __has_attribute(__nothrow__) -# define __nothrow __attribute__((__nothrow__)) -# elif defined(_MSC_VER) && defined(__cplusplus) -# define __nothrow __declspec(nothrow) -# else -# define __nothrow -# endif -#endif /* __nothrow */ - -#ifndef __pure_function - /* Many functions have no effects except the return value and their - * return value depends only on the parameters and/or global variables. - * Such a function can be subject to common subexpression elimination - * and loop optimization just as an arithmetic operator would be. - * These functions should be declared with the attribute pure. */ -# if defined(__GNUC__) || __has_attribute(__pure__) -# define __pure_function __attribute__((__pure__)) -# else -# define __pure_function -# endif -#endif /* __pure_function */ - -#ifndef __const_function - /* Many functions do not examine any values except their arguments, - * and have no effects except the return value. Basically this is just - * slightly more strict class than the PURE attribute, since function - * is not allowed to read global memory. - * - * Note that a function that has pointer arguments and examines the - * data pointed to must not be declared const. Likewise, a function - * that calls a non-const function usually must not be const. - * It does not make sense for a const function to return void. */ -# if defined(__GNUC__) || __has_attribute(__const__) -# define __const_function __attribute__((__const__)) -# else -# define __const_function -# endif -#endif /* __const_function */ - -#ifndef __hidden -# if defined(__GNUC__) || __has_attribute(__visibility__) -# define __hidden __attribute__((__visibility__("hidden"))) -# else -# define __hidden -# endif -#endif /* __hidden */ - -#ifndef __optimize -# if defined(__OPTIMIZE__) -# if (defined(__GNUC__) && !defined(__clang__)) || __has_attribute(__optimize__) -# define __optimize(ops) __attribute__((__optimize__(ops))) -# else -# define __optimize(ops) -# endif -# else -# define __optimize(ops) -# endif -#endif /* __optimize */ - -#ifndef __hot -# if defined(__OPTIMIZE__) -# if defined(__e2k__) -# define __hot __attribute__((__hot__)) __optimize(3) -# elif defined(__clang__) && !__has_attribute(__hot_) \ - && __has_attribute(__section__) && (defined(__linux__) || defined(__gnu_linux__)) - /* just put frequently used functions in separate section */ -# define __hot __attribute__((__section__("text.hot"))) __optimize("O3") -# elif defined(__GNUC__) || __has_attribute(__hot__) -# define __hot __attribute__((__hot__)) __optimize("O3") -# else -# define __hot __optimize("O3") -# endif -# else -# define __hot -# endif -#endif /* __hot */ - -#ifndef __cold -# if defined(__OPTIMIZE__) -# if defined(__e2k__) -# define __cold __attribute__((__cold__)) __optimize(1) -# elif defined(__clang__) && !__has_attribute(cold) \ - && __has_attribute(__section__) && (defined(__linux__) || defined(__gnu_linux__)) - /* just put infrequently used functions in separate section */ -# define __cold __attribute__((__section__("text.unlikely"))) __optimize("Os") -# elif defined(__GNUC__) || __has_attribute(cold) -# define __cold __attribute__((__cold__)) __optimize("Os") -# else -# define __cold __optimize("Os") -# endif -# else -# define __cold -# endif -#endif /* __cold */ - -#ifndef __flatten -# if defined(__OPTIMIZE__) && (defined(__GNUC__) || __has_attribute(__flatten__)) -# define __flatten __attribute__((__flatten__)) -# else -# define __flatten -# endif -#endif /* __flatten */ - -#ifndef likely -# if (defined(__GNUC__) || __has_builtin(__builtin_expect)) && !defined(__COVERITY__) -# define likely(cond) __builtin_expect(!!(cond), 1) -# else -# define likely(x) (x) -# endif -#endif /* likely */ - -#ifndef unlikely -# if (defined(__GNUC__) || __has_builtin(__builtin_expect)) && !defined(__COVERITY__) -# define unlikely(cond) __builtin_expect(!!(cond), 0) -# else -# define unlikely(x) (x) -# endif -#endif /* unlikely */ - -#ifndef __printf_args -# if defined(__GNUC__) || __has_attribute(__format__) -# define __printf_args(format_index, first_arg) \ - __attribute__((__format__(__printf__, format_index, first_arg))) -# else -# define __printf_args(format_index, first_arg) -# endif -#endif /* __printf_args */ - -#ifndef __anonymous_struct_extension__ -# if defined(__GNUC__) -# define __anonymous_struct_extension__ __extension__ -# else -# define __anonymous_struct_extension__ -# endif -#endif /* __anonymous_struct_extension__ */ - -#ifndef __Wpedantic_format_voidptr - static __inline __maybe_unused const void* __pure_function - __Wpedantic_format_voidptr(const void* ptr) {return ptr;} -# define __Wpedantic_format_voidptr(ARG) __Wpedantic_format_voidptr(ARG) -#endif /* __Wpedantic_format_voidptr */ - -/*----------------------------------------------------------------------------*/ - -#if defined(MDBX_USE_VALGRIND) -# include -# ifndef VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE - /* LY: available since Valgrind 3.10 */ -# define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) -# define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) -# endif -#elif !defined(RUNNING_ON_VALGRIND) -# define VALGRIND_CREATE_MEMPOOL(h,r,z) -# define VALGRIND_DESTROY_MEMPOOL(h) -# define VALGRIND_MEMPOOL_TRIM(h,a,s) -# define VALGRIND_MEMPOOL_ALLOC(h,a,s) -# define VALGRIND_MEMPOOL_FREE(h,a) -# define VALGRIND_MEMPOOL_CHANGE(h,a,b,s) -# define VALGRIND_MAKE_MEM_NOACCESS(a,s) -# define VALGRIND_MAKE_MEM_DEFINED(a,s) -# define VALGRIND_MAKE_MEM_UNDEFINED(a,s) -# define VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) -# define VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE(a,s) -# define VALGRIND_CHECK_MEM_IS_ADDRESSABLE(a,s) (0) -# define VALGRIND_CHECK_MEM_IS_DEFINED(a,s) (0) -# define RUNNING_ON_VALGRIND (0) -#endif /* MDBX_USE_VALGRIND */ - -#ifdef __SANITIZE_ADDRESS__ -# include -#elif !defined(ASAN_POISON_MEMORY_REGION) -# define ASAN_POISON_MEMORY_REGION(addr, size) \ - ((void)(addr), (void)(size)) -# define ASAN_UNPOISON_MEMORY_REGION(addr, size) \ - ((void)(addr), (void)(size)) -#endif /* __SANITIZE_ADDRESS__ */ - -/*----------------------------------------------------------------------------*/ - -#ifndef ARRAY_LENGTH -# ifdef __cplusplus - template - char (&__ArraySizeHelper(T (&array)[N]))[N]; -# define ARRAY_LENGTH(array) (sizeof(::__ArraySizeHelper(array))) -# else -# define ARRAY_LENGTH(array) (sizeof(array) / sizeof(array[0])) -# endif -#endif /* ARRAY_LENGTH */ - -#ifndef ARRAY_END -# define ARRAY_END(array) (&array[ARRAY_LENGTH(array)]) -#endif /* ARRAY_END */ - -#ifndef STRINGIFY -# define STRINGIFY_HELPER(x) #x -# define STRINGIFY(x) STRINGIFY_HELPER(x) -#endif /* STRINGIFY */ - -#define CONCAT(a,b) a##b -#define XCONCAT(a,b) CONCAT(a,b) - -#ifndef offsetof -# define offsetof(type, member) __builtin_offsetof(type, member) -#endif /* offsetof */ - -#ifndef container_of -# define container_of(ptr, type, member) \ - ((type *)((char *)(ptr) - offsetof(type, member))) -#endif /* container_of */ - -#define MDBX_TETRAD(a, b, c, d) \ - ((uint32_t)(a) << 24 | (uint32_t)(b) << 16 | (uint32_t)(c) << 8 | (d)) - -#define MDBX_STRING_TETRAD(str) MDBX_TETRAD(str[0], str[1], str[2], str[3]) - -#define FIXME "FIXME: " __FILE__ ", " STRINGIFY(__LINE__) - -#ifndef STATIC_ASSERT_MSG -# if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \ - || __has_feature(c_static_assert) -# define STATIC_ASSERT_MSG(expr, msg) _Static_assert(expr, msg) -# elif defined(static_assert) -# define STATIC_ASSERT_MSG(expr, msg) static_assert(expr, msg) -# elif defined(_MSC_VER) -# include -# define STATIC_ASSERT_MSG(expr, msg) _STATIC_ASSERT(expr) -# else -# define STATIC_ASSERT_MSG(expr, msg) switch (0) {case 0:case (expr):;} -# endif -#endif /* STATIC_ASSERT */ - -#ifndef STATIC_ASSERT -# define STATIC_ASSERT(expr) STATIC_ASSERT_MSG(expr, #expr) -#endif - -/* *INDENT-ON* */ -/* clang-format on */ diff --git a/libs/libmdbx/src/src/elements/internals.h b/libs/libmdbx/src/src/elements/internals.h deleted file mode 100644 index 62552de95e..0000000000 --- a/libs/libmdbx/src/src/elements/internals.h +++ /dev/null @@ -1,1331 +0,0 @@ -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . */ - -#pragma once -#ifdef MDBX_CONFIG_H -#include MDBX_CONFIG_H -#endif - -/* *INDENT-OFF* */ -/* clang-format off */ - -/* In case the MDBX_DEBUG is undefined set it corresponding to NDEBUG */ -#ifndef MDBX_DEBUG -# ifdef NDEBUG -# define MDBX_DEBUG 0 -# else -# define MDBX_DEBUG 1 -# endif -#endif - -/* Undefine the NDEBUG if debugging is enforced by MDBX_DEBUG */ -#if MDBX_DEBUG -# undef NDEBUG -#endif - -#ifdef MDBX_ALLOY -/* Amalgamated build */ -# define MDBX_INTERNAL_FUNC static -# define MDBX_INTERNAL_VAR static -#else -/* Non-amalgamated build */ -# define MDBX_INTERNAL_FUNC -# define MDBX_INTERNAL_VAR extern -#endif /* MDBX_ALLOY */ - -#ifndef MDBX_DISABLE_GNU_SOURCE -#define MDBX_DISABLE_GNU_SOURCE 0 -#endif -#if MDBX_DISABLE_GNU_SOURCE -#undef _GNU_SOURCE -#elif defined(__linux__) || defined(__gnu_linux__) -#define _GNU_SOURCE -#endif - -/*----------------------------------------------------------------------------*/ - -/* Should be defined before any includes */ -#ifndef _FILE_OFFSET_BITS -# define _FILE_OFFSET_BITS 64 -#endif - -#ifdef __APPLE__ -#define _DARWIN_C_SOURCE -#endif - -#ifdef _MSC_VER -# if _MSC_VER < 1400 -# error "Microsoft Visual C++ 8.0 (Visual Studio 2005) or later version is required" -# endif -# ifndef _CRT_SECURE_NO_WARNINGS -# define _CRT_SECURE_NO_WARNINGS -# endif -#if _MSC_VER > 1800 -# pragma warning(disable : 4464) /* relative include path contains '..' */ -#endif -#if _MSC_VER > 1913 -# pragma warning(disable : 5045) /* Compiler will insert Spectre mitigation... */ -#endif -#pragma warning(disable : 4710) /* 'xyz': function not inlined */ -#pragma warning(disable : 4711) /* function 'xyz' selected for automatic inline expansion */ -#pragma warning(disable : 4201) /* nonstandard extension used : nameless struct / union */ -#pragma warning(disable : 4702) /* unreachable code */ -#pragma warning(disable : 4706) /* assignment within conditional expression */ -#pragma warning(disable : 4127) /* conditional expression is constant */ -#pragma warning(disable : 4324) /* 'xyz': structure was padded due to alignment specifier */ -#pragma warning(disable : 4310) /* cast truncates constant value */ -#pragma warning(disable : 4820) /* bytes padding added after data member for aligment */ -#pragma warning(disable : 4548) /* expression before comma has no effect; expected expression with side - effect */ -#pragma warning(disable : 4366) /* the result of the unary '&' operator may be unaligned */ -#pragma warning(disable : 4200) /* nonstandard extension used: zero-sized array in struct/union */ -#endif /* _MSC_VER (warnings) */ - -#include "../../mdbx.h" -#include "defs.h" - -#if defined(__GNUC__) && !__GNUC_PREREQ(4,2) - /* Actualy libmdbx was not tested with compilers older than GCC from RHEL6. - * But you could remove this #error and try to continue at your own risk. - * In such case please don't rise up an issues related ONLY to old compilers. - */ -# warning "libmdbx required GCC >= 4.2" -#endif - -#if defined(__clang__) && !__CLANG_PREREQ(3,8) - /* Actualy libmdbx was not tested with CLANG older than 3.8. - * But you could remove this #error and try to continue at your own risk. - * In such case please don't rise up an issues related ONLY to old compilers. - */ -# warning "libmdbx required CLANG >= 3.8" -#endif - -#if defined(__GLIBC__) && !__GLIBC_PREREQ(2,12) - /* Actualy libmdbx was not tested with something older than glibc 2.12 (from RHEL6). - * But you could remove this #error and try to continue at your own risk. - * In such case please don't rise up an issues related ONLY to old systems. - */ -# warning "libmdbx required at least GLIBC 2.12." -#endif - -#ifdef __SANITIZE_THREAD__ -# warning "libmdbx don't compatible with ThreadSanitizer, you will get a lot of false-positive issues." -#endif /* __SANITIZE_THREAD__ */ - -#if __has_warning("-Wconstant-logical-operand") -# if defined(__clang__) -# pragma clang diagnostic ignored "-Wconstant-logical-operand" -# elif defined(__GNUC__) -# pragma GCC diagnostic ignored "-Wconstant-logical-operand" -# else -# pragma warning disable "constant-logical-operand" -# endif -#endif /* -Wconstant-logical-operand */ - -#if defined(__LCC__) && (__LCC__ <= 121) - /* bug #2798 */ -# pragma diag_suppress alignment_reduction_ignored -#elif defined(__ICC) -# pragma warning(disable: 3453 1366) -#elif __has_warning("-Walignment-reduction-ignored") -# if defined(__clang__) -# pragma clang diagnostic ignored "-Walignment-reduction-ignored" -# elif defined(__GNUC__) -# pragma GCC diagnostic ignored "-Walignment-reduction-ignored" -# else -# pragma warning disable "alignment-reduction-ignored" -# endif -#endif /* -Walignment-reduction-ignored */ - -/* *INDENT-ON* */ -/* clang-format on */ - -#include "osal.h" - -#define mdbx_sourcery_anchor XCONCAT(mdbx_sourcery_, MDBX_BUILD_SOURCERY) -#if defined(MDBX_TOOLS) -extern LIBMDBX_API const char *const mdbx_sourcery_anchor; -#endif - -#include "options.h" - -/*----------------------------------------------------------------------------*/ -/* Basic constants and types */ - -/* The minimum number of keys required in a database page. - * Setting this to a larger value will place a smaller bound on the - * maximum size of a data item. Data items larger than this size will - * be pushed into overflow pages instead of being stored directly in - * the B-tree node. This value used to default to 4. With a page size - * of 4096 bytes that meant that any item larger than 1024 bytes would - * go into an overflow page. That also meant that on average 2-3KB of - * each overflow page was wasted space. The value cannot be lower than - * 2 because then there would no longer be a tree structure. With this - * value, items larger than 2KB will go into overflow pages, and on - * average only 1KB will be wasted. */ -#define MDBX_MINKEYS 2 - -/* A stamp that identifies a file as an MDBX file. - * There's nothing special about this value other than that it is easily - * recognizable, and it will reflect any byte order mismatches. */ -#define MDBX_MAGIC UINT64_C(/* 56-bit prime */ 0x59659DBDEF4C11) - -/* The version number for a database's datafile format. */ -#define MDBX_DATA_VERSION 2 -/* The version number for a database's lockfile format. */ -#define MDBX_LOCK_VERSION 3 - -/* handle for the DB used to track free pages. */ -#define FREE_DBI 0 -/* handle for the default DB. */ -#define MAIN_DBI 1 -/* Number of DBs in metapage (free and main) - also hardcoded elsewhere */ -#define CORE_DBS 2 -#define MAX_DBI (INT16_MAX - CORE_DBS) -#if MAX_DBI != MDBX_MAX_DBI -#error "Opps, MAX_DBI != MDBX_MAX_DBI" -#endif - -/* Number of meta pages - also hardcoded elsewhere */ -#define NUM_METAS 3 - -/* A page number in the database. - * - * MDBX uses 32 bit for page numbers. This limits database - * size up to 2^44 bytes, in case of 4K pages. */ -typedef uint32_t pgno_t; -#define PRIaPGNO PRIu32 -#define MAX_PAGENO UINT32_C(0x7FFFffff) -#define MIN_PAGENO NUM_METAS - -/* A transaction ID. */ -typedef uint64_t txnid_t; -#define PRIaTXN PRIi64 -#define MIN_TXNID UINT64_C(1) -#define INVALID_TXNID UINT64_MAX -/* LY: for testing non-atomic 64-bit txnid on 32-bit arches. - * #define MDBX_TXNID_STEP (UINT32_MAX / 3) */ -#ifndef MDBX_TXNID_STEP -#if MDBX_64BIT_CAS -#define MDBX_TXNID_STEP 1u -#else -#define MDBX_TXNID_STEP 2u -#endif -#endif /* MDBX_TXNID_STEP */ - -/* Used for offsets within a single page. - * Since memory pages are typically 4 or 8KB in size, 12-13 bits, - * this is plenty. */ -typedef uint16_t indx_t; - -#define MEGABYTE ((size_t)1 << 20) - -/*----------------------------------------------------------------------------*/ -/* Core structures for database and shared memory (i.e. format definition) */ -#pragma pack(push, 1) - -typedef union mdbx_safe64 { - volatile uint64_t inconsistent; -#if MDBX_64BIT_ATOMIC - volatile uint64_t atomic; -#endif /* MDBX_64BIT_ATOMIC */ - struct { -#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - volatile uint32_t low; - volatile uint32_t high; -#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - volatile uint32_t high; - volatile uint32_t low; -#else -#error "FIXME: Unsupported byte order" -#endif /* __BYTE_ORDER__ */ - }; -} mdbx_safe64_t; - -#define SAFE64_INVALID_THRESHOLD UINT64_C(0xffffFFFF00000000) - -/* Information about a single database in the environment. */ -typedef struct MDBX_db { - uint16_t md_flags; /* see mdbx_dbi_open */ - uint16_t md_depth; /* depth of this tree */ - uint32_t md_xsize; /* key-size for MDBX_DUPFIXED (LEAF2 pages) */ - pgno_t md_root; /* the root page of this tree */ - pgno_t md_branch_pages; /* number of internal pages */ - pgno_t md_leaf_pages; /* number of leaf pages */ - pgno_t md_overflow_pages; /* number of overflow pages */ - uint64_t md_seq; /* table sequence counter */ - uint64_t md_entries; /* number of data items */ - uint64_t md_mod_txnid; /* txnid of last commited modification */ -} MDBX_db; - -/* database size-related parameters */ -typedef struct mdbx_geo_t { - uint16_t grow; /* datafile growth step in pages */ - uint16_t shrink; /* datafile shrink threshold in pages */ - pgno_t lower; /* minimal size of datafile in pages */ - pgno_t upper; /* maximal size of datafile in pages */ - pgno_t now; /* current size of datafile in pages */ - pgno_t next; /* first unused page in the datafile, - * but actually the file may be shorter. */ -} mdbx_geo_t; - -/* Meta page content. - * A meta page is the start point for accessing a database snapshot. - * Pages 0-1 are meta pages. Transaction N writes meta page (N % 2). */ -typedef struct MDBX_meta { - /* Stamp identifying this as an MDBX file. - * It must be set to MDBX_MAGIC with MDBX_DATA_VERSION. */ - uint64_t mm_magic_and_version; - - /* txnid that committed this page, the first of a two-phase-update pair */ - mdbx_safe64_t mm_txnid_a; - - uint16_t mm_extra_flags; /* extra DB flags, zero (nothing) for now */ - uint8_t mm_validator_id; /* ID of checksum and page validation method, - * zero (nothing) for now */ - uint8_t mm_extra_pagehdr; /* extra bytes in the page header, - * zero (nothing) for now */ - - mdbx_geo_t mm_geo; /* database size-related parameters */ - - MDBX_db mm_dbs[CORE_DBS]; /* first is free space, 2nd is main db */ - /* The size of pages used in this DB */ -#define mm_psize mm_dbs[FREE_DBI].md_xsize -/* Any persistent environment flags, see mdbx_env */ -#define mm_flags mm_dbs[FREE_DBI].md_flags - mdbx_canary mm_canary; - -#define MDBX_DATASIGN_NONE 0u -#define MDBX_DATASIGN_WEAK 1u -#define SIGN_IS_STEADY(sign) ((sign) > MDBX_DATASIGN_WEAK) -#define META_IS_STEADY(meta) SIGN_IS_STEADY((meta)->mm_datasync_sign) - volatile uint64_t mm_datasync_sign; - - /* txnid that committed this page, the second of a two-phase-update pair */ - mdbx_safe64_t mm_txnid_b; - - /* Number of non-meta pages which were put in GC after COW. May be 0 in case - * DB was previously handled by libmdbx without corresponding feature. - * This value in couple with mr_snapshot_pages_retired allows fast estimation - * of "how much reader is restraining GC recycling". */ - uint64_t mm_pages_retired; - - /* The analogue /proc/sys/kernel/random/boot_id or similar to determine - * whether the system was rebooted after the last use of the database files. - * If there was no reboot, but there is no need to rollback to the last - * steady sync point. Zeros mean that no relevant information is available - * from the system. */ - bin128_t mm_bootid; - -} MDBX_meta; - -/* Common header for all page types. The page type depends on mp_flags. - * - * P_BRANCH and P_LEAF pages have unsorted 'MDBX_node's at the end, with - * sorted mp_ptrs[] entries referring to them. Exception: P_LEAF2 pages - * omit mp_ptrs and pack sorted MDBX_DUPFIXED values after the page header. - * - * P_OVERFLOW records occupy one or more contiguous pages where only the - * first has a page header. They hold the real data of F_BIGDATA nodes. - * - * P_SUBP sub-pages are small leaf "pages" with duplicate data. - * A node with flag F_DUPDATA but not F_SUBDATA contains a sub-page. - * (Duplicate data can also go in sub-databases, which use normal pages.) - * - * P_META pages contain MDBX_meta, the start point of an MDBX snapshot. - * - * Each non-metapage up to MDBX_meta.mm_last_pg is reachable exactly once - * in the snapshot: Either used by a database or listed in a GC record. */ -typedef struct MDBX_page { - union { - struct MDBX_page *mp_next; /* for in-memory list of freed pages */ - uint64_t mp_txnid; /* txnid during which the page has been COW-ed */ - }; - uint16_t mp_leaf2_ksize; /* key size if this is a LEAF2 page */ -#define P_BRANCH 0x01 /* branch page */ -#define P_LEAF 0x02 /* leaf page */ -#define P_OVERFLOW 0x04 /* overflow page */ -#define P_META 0x08 /* meta page */ -#define P_DIRTY 0x10 /* dirty page, also set for P_SUBP pages */ -#define P_LEAF2 0x20 /* for MDBX_DUPFIXED records */ -#define P_SUBP 0x40 /* for MDBX_DUPSORT sub-pages */ -#define P_LOOSE 0x4000 /* page was dirtied then freed, can be reused */ -#define P_KEEP 0x8000 /* leave this page alone during spill */ - uint16_t mp_flags; - union { - struct { - indx_t mp_lower; /* lower bound of free space */ - indx_t mp_upper; /* upper bound of free space */ - }; - uint32_t mp_pages; /* number of overflow pages */ - }; - pgno_t mp_pgno; /* page number */ - - /* dynamic size */ - indx_t mp_ptrs[/* C99 */]; -} MDBX_page; - -/* Size of the page header, excluding dynamic data at the end */ -#define PAGEHDRSZ ((unsigned)offsetof(MDBX_page, mp_ptrs)) - -#pragma pack(pop) - -#if MDBX_LOCKING == MDBX_LOCKING_WIN32FILES -#define MDBX_CLOCK_SIGN UINT32_C(0xF10C) -typedef void mdbx_ipclock_t; -#elif MDBX_LOCKING == MDBX_LOCKING_SYSV - -#define MDBX_CLOCK_SIGN UINT32_C(0xF18D) -typedef mdbx_pid_t mdbx_ipclock_t; -#ifndef EOWNERDEAD -#define EOWNERDEAD MDBX_RESULT_TRUE -#endif - -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ - MDBX_LOCKING == MDBX_LOCKING_POSIX2008 -#define MDBX_CLOCK_SIGN UINT32_C(0x8017) -typedef pthread_mutex_t mdbx_ipclock_t; -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 -#define MDBX_CLOCK_SIGN UINT32_C(0xFC29) -typedef sem_t mdbx_ipclock_t; -#else -#error "FIXME" -#endif /* MDBX_LOCKING */ - -#if MDBX_LOCKING > MDBX_LOCKING_SYSV -MDBX_INTERNAL_FUNC int mdbx_ipclock_stub(mdbx_ipclock_t *ipc); -MDBX_INTERNAL_FUNC int mdbx_ipclock_destroy(mdbx_ipclock_t *ipc); -#endif /* MDBX_LOCKING */ - -/* Reader Lock Table - * - * Readers don't acquire any locks for their data access. Instead, they - * simply record their transaction ID in the reader table. The reader - * mutex is needed just to find an empty slot in the reader table. The - * slot's address is saved in thread-specific data so that subsequent - * read transactions started by the same thread need no further locking to - * proceed. - * - * If MDBX_NOTLS is set, the slot address is not saved in thread-specific data. - * No reader table is used if the database is on a read-only filesystem. - * - * Since the database uses multi-version concurrency control, readers don't - * actually need any locking. This table is used to keep track of which - * readers are using data from which old transactions, so that we'll know - * when a particular old transaction is no longer in use. Old transactions - * that have discarded any data pages can then have those pages reclaimed - * for use by a later write transaction. - * - * The lock table is constructed such that reader slots are aligned with the - * processor's cache line size. Any slot is only ever used by one thread. - * This alignment guarantees that there will be no contention or cache - * thrashing as threads update their own slot info, and also eliminates - * any need for locking when accessing a slot. - * - * A writer thread will scan every slot in the table to determine the oldest - * outstanding reader transaction. Any freed pages older than this will be - * reclaimed by the writer. The writer doesn't use any locks when scanning - * this table. This means that there's no guarantee that the writer will - * see the most up-to-date reader info, but that's not required for correct - * operation - all we need is to know the upper bound on the oldest reader, - * we don't care at all about the newest reader. So the only consequence of - * reading stale information here is that old pages might hang around a - * while longer before being reclaimed. That's actually good anyway, because - * the longer we delay reclaiming old pages, the more likely it is that a - * string of contiguous pages can be found after coalescing old pages from - * many old transactions together. */ - -/* The actual reader record, with cacheline padding. */ -typedef struct MDBX_reader { - /* Current Transaction ID when this transaction began, or (txnid_t)-1. - * Multiple readers that start at the same time will probably have the - * same ID here. Again, it's not important to exclude them from - * anything; all we need to know is which version of the DB they - * started from so we can avoid overwriting any data used in that - * particular version. */ - mdbx_safe64_t /* txnid_t */ mr_txnid; - - /* The information we store in a single slot of the reader table. - * In addition to a transaction ID, we also record the process and - * thread ID that owns a slot, so that we can detect stale information, - * e.g. threads or processes that went away without cleaning up. - * - * NOTE: We currently don't check for stale records. - * We simply re-init the table when we know that we're the only process - * opening the lock file. */ - - /* The thread ID of the thread owning this txn. */ -#if MDBX_WORDBITS >= 64 - volatile uint64_t mr_tid; -#else - volatile uint32_t mr_tid; - volatile uint32_t mr_aba_curer; /* CSN to resolve ABA_problems on 32-bit arch, - unused for now */ -#endif - /* The process ID of the process owning this reader txn. */ - volatile uint32_t mr_pid; - - /* The number of pages used in the reader's MVCC snapshot, - * i.e. the value of meta->mm_geo.next and txn->mt_next_pgno */ - volatile pgno_t mr_snapshot_pages_used; - /* Number of retired pages at the time this reader starts transaction. So, - * at any time the difference mm_pages_retired - mr_snapshot_pages_retired - * will give the number of pages which this reader restraining from reuse. */ - volatile uint64_t mr_snapshot_pages_retired; -} MDBX_reader; - -/* The header for the reader table (a memory-mapped lock file). */ -typedef struct MDBX_lockinfo { - /* Stamp identifying this as an MDBX file. - * It must be set to MDBX_MAGIC with with MDBX_LOCK_VERSION. */ - uint64_t mti_magic_and_version; - - /* Format of this lock file. Must be set to MDBX_LOCK_FORMAT. */ - uint32_t mti_os_and_format; - - /* Flags which environment was opened. */ - volatile uint32_t mti_envmode; - - /* Threshold of un-synced-with-disk pages for auto-sync feature, - * zero means no-threshold, i.e. auto-sync is disabled. */ - volatile pgno_t mti_autosync_threshold; - - /* Low 32-bit of txnid with which meta-pages was synced, - * i.e. for sync-polling in the MDBX_NOMETASYNC mode. */ - volatile uint32_t mti_meta_sync_txnid; - - /* Period for timed auto-sync feature, i.e. at the every steady checkpoint - * the mti_unsynced_timeout sets to the current_time + mti_autosync_period. - * The time value is represented in a suitable system-dependent form, for - * example clock_gettime(CLOCK_BOOTTIME) or clock_gettime(CLOCK_MONOTONIC). - * Zero means timed auto-sync is disabled. */ - volatile uint64_t mti_autosync_period; - - /* Marker to distinguish uniqueness of DB/CLK.*/ - volatile uint64_t mti_bait_uniqueness; - - alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ - - /* Write transation lock. */ -#if MDBX_LOCKING > 0 - mdbx_ipclock_t mti_wlock; -#endif /* MDBX_LOCKING > 0 */ - - volatile txnid_t mti_oldest_reader; - - /* Timestamp of the last steady sync. Value is represented in a suitable - * system-dependent form, for example clock_gettime(CLOCK_BOOTTIME) or - * clock_gettime(CLOCK_MONOTONIC). */ - volatile uint64_t mti_sync_timestamp; - - /* Number un-synced-with-disk pages for auto-sync feature. */ - volatile pgno_t mti_unsynced_pages; - - /* Number of page which was discarded last time by madvise(MADV_FREE). */ - volatile pgno_t mti_discarded_tail; - - /* Timestamp of the last readers check. */ - volatile uint64_t mti_reader_check_timestamp; - - alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ - - /* Readeaders registration lock. */ -#if MDBX_LOCKING > 0 - mdbx_ipclock_t mti_rlock; -#endif /* MDBX_LOCKING > 0 */ - - /* The number of slots that have been used in the reader table. - * This always records the maximum count, it is not decremented - * when readers release their slots. */ - volatile unsigned mti_numreaders; - volatile unsigned mti_readers_refresh_flag; - - alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ - MDBX_reader mti_readers[/* C99 */]; -} MDBX_lockinfo; - -/* Lockfile format signature: version, features and field layout */ -#define MDBX_LOCK_FORMAT \ - (MDBX_CLOCK_SIGN * 27733 + (unsigned)sizeof(MDBX_reader) * 13 + \ - (unsigned)offsetof(MDBX_reader, mr_snapshot_pages_used) * 251 + \ - (unsigned)offsetof(MDBX_lockinfo, mti_oldest_reader) * 83 + \ - (unsigned)offsetof(MDBX_lockinfo, mti_numreaders) * 37 + \ - (unsigned)offsetof(MDBX_lockinfo, mti_readers) * 29) - -#define MDBX_DATA_MAGIC ((MDBX_MAGIC << 8) + MDBX_DATA_VERSION) -#define MDBX_DATA_MAGIC_DEVEL ((MDBX_MAGIC << 8) + 255) - -#define MDBX_LOCK_MAGIC ((MDBX_MAGIC << 8) + MDBX_LOCK_VERSION) - -#ifndef MDBX_ASSUME_MALLOC_OVERHEAD -#define MDBX_ASSUME_MALLOC_OVERHEAD (sizeof(void *) * 2u) -#endif /* MDBX_ASSUME_MALLOC_OVERHEAD */ - -/* The maximum size of a database page. - * - * It is 64K, but value-PAGEHDRSZ must fit in MDBX_page.mp_upper. - * - * MDBX will use database pages < OS pages if needed. - * That causes more I/O in write transactions: The OS must - * know (read) the whole page before writing a partial page. - * - * Note that we don't currently support Huge pages. On Linux, - * regular data files cannot use Huge pages, and in general - * Huge pages aren't actually pageable. We rely on the OS - * demand-pager to read our data and page it out when memory - * pressure from other processes is high. So until OSs have - * actual paging support for Huge pages, they're not viable. */ -#define MAX_PAGESIZE MDBX_MAX_PAGESIZE -#define MIN_PAGESIZE MDBX_MIN_PAGESIZE - -#define MIN_MAPSIZE (MIN_PAGESIZE * MIN_PAGENO) -#if defined(_WIN32) || defined(_WIN64) -#define MAX_MAPSIZE32 UINT32_C(0x38000000) -#else -#define MAX_MAPSIZE32 UINT32_C(0x7ff80000) -#endif -#define MAX_MAPSIZE64 (MAX_PAGENO * (uint64_t)MAX_PAGESIZE) - -#if MDBX_WORDBITS >= 64 -#define MAX_MAPSIZE MAX_MAPSIZE64 -#define MDBX_READERS_LIMIT \ - ((65536 - sizeof(MDBX_lockinfo)) / sizeof(MDBX_reader)) -#else -#define MDBX_READERS_LIMIT 1024 -#define MAX_MAPSIZE MAX_MAPSIZE32 -#endif /* MDBX_WORDBITS */ - -/*----------------------------------------------------------------------------*/ -/* Two kind lists of pages (aka PNL) */ - -/* An PNL is an Page Number List, a sorted array of IDs. The first element of - * the array is a counter for how many actual page-numbers are in the list. - * PNLs are sorted in descending order, this allow cut off a page with lowest - * pgno (at the tail) just truncating the list */ -#define MDBX_PNL_ASCENDING 0 -typedef pgno_t *MDBX_PNL; - -#if MDBX_PNL_ASCENDING -#define MDBX_PNL_ORDERED(first, last) ((first) < (last)) -#define MDBX_PNL_DISORDERED(first, last) ((first) >= (last)) -#else -#define MDBX_PNL_ORDERED(first, last) ((first) > (last)) -#define MDBX_PNL_DISORDERED(first, last) ((first) <= (last)) -#endif - -/* List of txnid, only for MDBX_txn.tw.lifo_reclaimed */ -typedef txnid_t *MDBX_TXL; - -/* An Dirty-Page list item is an pgno/pointer pair. */ -typedef union MDBX_DP { - struct { - pgno_t pgno; - MDBX_page *ptr; - }; - struct { - unsigned sorted; - unsigned length; - }; -} MDBX_DP; - -/* An DPL (dirty-page list) is a sorted array of MDBX_DPs. - * The first element's length member is a count of how many actual - * elements are in the array. */ -typedef MDBX_DP *MDBX_DPL; - -/* PNL sizes */ -#define MDBX_PNL_GRANULATE 1024 -#define MDBX_PNL_INITIAL \ - (MDBX_PNL_GRANULATE - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(pgno_t)) -#define MDBX_PNL_MAX \ - ((1u << 24) - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(pgno_t)) -#define MDBX_DPL_TXNFULL (MDBX_PNL_MAX / 4) - -#define MDBX_TXL_GRANULATE 32 -#define MDBX_TXL_INITIAL \ - (MDBX_TXL_GRANULATE - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(txnid_t)) -#define MDBX_TXL_MAX \ - ((1u << 17) - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(txnid_t)) - -#define MDBX_PNL_ALLOCLEN(pl) ((pl)[-1]) -#define MDBX_PNL_SIZE(pl) ((pl)[0]) -#define MDBX_PNL_FIRST(pl) ((pl)[1]) -#define MDBX_PNL_LAST(pl) ((pl)[MDBX_PNL_SIZE(pl)]) -#define MDBX_PNL_BEGIN(pl) (&(pl)[1]) -#define MDBX_PNL_END(pl) (&(pl)[MDBX_PNL_SIZE(pl) + 1]) - -#if MDBX_PNL_ASCENDING -#define MDBX_PNL_LEAST(pl) MDBX_PNL_FIRST(pl) -#define MDBX_PNL_MOST(pl) MDBX_PNL_LAST(pl) -#else -#define MDBX_PNL_LEAST(pl) MDBX_PNL_LAST(pl) -#define MDBX_PNL_MOST(pl) MDBX_PNL_FIRST(pl) -#endif - -#define MDBX_PNL_SIZEOF(pl) ((MDBX_PNL_SIZE(pl) + 1) * sizeof(pgno_t)) -#define MDBX_PNL_IS_EMPTY(pl) (MDBX_PNL_SIZE(pl) == 0) - -/*----------------------------------------------------------------------------*/ -/* Internal structures */ - -/* Auxiliary DB info. - * The information here is mostly static/read-only. There is - * only a single copy of this record in the environment. */ -typedef struct MDBX_dbx { - MDBX_val md_name; /* name of the database */ - MDBX_cmp_func *md_cmp; /* function for comparing keys */ - MDBX_cmp_func *md_dcmp; /* function for comparing data items */ -} MDBX_dbx; - -/* A database transaction. - * Every operation requires a transaction handle. */ -struct MDBX_txn { -#define MDBX_MT_SIGNATURE UINT32_C(0x93D53A31) - size_t mt_signature; - MDBX_txn *mt_parent; /* parent of a nested txn */ - /* Nested txn under this txn, set together with flag MDBX_TXN_HAS_CHILD */ - MDBX_txn *mt_child; - mdbx_geo_t mt_geo; - /* next unallocated page */ -#define mt_next_pgno mt_geo.next - /* corresponding to the current size of datafile */ -#define mt_end_pgno mt_geo.now - - /* Transaction Flags */ - /* mdbx_txn_begin() flags */ -#define MDBX_TXN_BEGIN_FLAGS \ - (MDBX_NOMETASYNC | MDBX_SAFE_NOSYNC | MDBX_MAPASYNC | MDBX_RDONLY | \ - MDBX_TRYTXN) - /* internal txn flags */ -#define MDBX_TXN_FINISHED 0x01 /* txn is finished or never began */ -#define MDBX_TXN_ERROR 0x02 /* txn is unusable after an error */ -#define MDBX_TXN_DIRTY 0x04 /* must write, even if dirty list is empty */ -#define MDBX_TXN_SPILLS 0x08 /* txn or a parent has spilled pages */ -#define MDBX_TXN_HAS_CHILD 0x10 /* txn has an MDBX_txn.mt_child */ - /* most operations on the txn are currently illegal */ -#define MDBX_TXN_BLOCKED \ - (MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_HAS_CHILD) - unsigned mt_flags; - /* The ID of this transaction. IDs are integers incrementing from 1. - * Only committed write transactions increment the ID. If a transaction - * aborts, the ID may be re-used by the next writer. */ - txnid_t mt_txnid; - MDBX_env *mt_env; /* the DB environment */ - /* Array of records for each DB known in the environment. */ - MDBX_dbx *mt_dbxs; - /* Array of MDBX_db records for each known DB */ - MDBX_db *mt_dbs; - /* Array of sequence numbers for each DB handle */ - unsigned *mt_dbiseqs; - - /* Transaction DB Flags */ -#define DB_DIRTY MDBX_TBL_DIRTY /* DB was written in this txn */ -#define DB_STALE MDBX_TBL_STALE /* Named-DB record is older than txnID */ -#define DB_FRESH MDBX_TBL_FRESH /* Named-DB handle opened in this txn */ -#define DB_CREAT MDBX_TBL_CREAT /* Named-DB handle created in this txn */ -#define DB_VALID 0x10 /* DB handle is valid, see also MDBX_VALID */ -#define DB_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */ -#define DB_DUPDATA 0x40 /* DB is MDBX_DUPSORT data */ -#define DB_AUDITED 0x80 /* Internal flag for accounting during audit */ - /* In write txns, array of cursors for each DB */ - MDBX_cursor **mt_cursors; - /* Array of flags for each DB */ - uint8_t *mt_dbflags; - /* Number of DB records in use, or 0 when the txn is finished. - * This number only ever increments until the txn finishes; we - * don't decrement it when individual DB handles are closed. */ - MDBX_dbi mt_numdbs; - size_t mt_owner; /* thread ID that owns this transaction */ - mdbx_canary mt_canary; - - union { - struct { - /* For read txns: This thread/txn's reader table slot, or NULL. */ - MDBX_reader *reader; - } to; - struct { - pgno_t *reclaimed_pglist; /* Reclaimed GC pages */ - txnid_t last_reclaimed; /* ID of last used record */ - pgno_t loose_refund_wl /* FIXME: describe */; - /* dirtylist room: Dirty array size - dirty pages visible to this txn. - * Includes ancestor txns' dirty pages not hidden by other txns' - * dirty/spilled pages. Thus commit(nested txn) has room to merge - * dirtylist into mt_parent after freeing hidden mt_parent pages. */ - unsigned dirtyroom; - /* For write txns: Modified pages. Sorted when not MDBX_WRITEMAP. */ - MDBX_DPL dirtylist; - /* The list of reclaimed txns from GC */ - MDBX_TXL lifo_reclaimed; - /* The list of pages that became unused during this transaction. */ - MDBX_PNL retired_pages; - /* The list of loose pages that became unused and may be reused - * in this transaction, linked through `mp_next`. */ - MDBX_page *loose_pages; - /* Number of loose pages (tw.loose_pages) */ - unsigned loose_count; - /* Number of retired to parent pages (tw.retired2parent_pages) */ - unsigned retired2parent_count; - /* The list of parent's txn dirty pages that retired (became unused) - * in this transaction, linked through `mp_next`. */ - MDBX_page *retired2parent_pages; - /* The sorted list of dirty pages we temporarily wrote to disk - * because the dirty list was full. page numbers in here are - * shifted left by 1, deleted slots have the LSB set. */ - MDBX_PNL spill_pages; - } tw; - }; -}; - -/* Enough space for 2^32 nodes with minimum of 2 keys per node. I.e., plenty. - * At 4 keys per node, enough for 2^64 nodes, so there's probably no need to - * raise this on a 64 bit machine. */ -#if MDBX_WORDBITS >= 64 -#define CURSOR_STACK 28 -#else -#define CURSOR_STACK 20 -#endif - -struct MDBX_xcursor; - -/* Cursors are used for all DB operations. - * A cursor holds a path of (page pointer, key index) from the DB - * root to a position in the DB, plus other state. MDBX_DUPSORT - * cursors include an xcursor to the current data item. Write txns - * track their cursors and keep them up to date when data moves. - * Exception: An xcursor's pointer to a P_SUBP page can be stale. - * (A node with F_DUPDATA but no F_SUBDATA contains a subpage). */ -struct MDBX_cursor { -#define MDBX_MC_SIGNATURE UINT32_C(0xFE05D5B1) -#define MDBX_MC_READY4CLOSE UINT32_C(0x2817A047) -#define MDBX_MC_WAIT4EOT UINT32_C(0x90E297A7) - uint32_t mc_signature; - /* The database handle this cursor operates on */ - MDBX_dbi mc_dbi; - /* Next cursor on this DB in this txn */ - MDBX_cursor *mc_next; - /* Backup of the original cursor if this cursor is a shadow */ - MDBX_cursor *mc_backup; - /* Context used for databases with MDBX_DUPSORT, otherwise NULL */ - struct MDBX_xcursor *mc_xcursor; - /* The transaction that owns this cursor */ - MDBX_txn *mc_txn; - /* The database record for this cursor */ - MDBX_db *mc_db; - /* The database auxiliary record for this cursor */ - MDBX_dbx *mc_dbx; - /* The mt_dbflag for this database */ - uint8_t *mc_dbflag; - uint16_t mc_snum; /* number of pushed pages */ - uint16_t mc_top; /* index of top page, normally mc_snum-1 */ - /* Cursor state flags. */ -#define C_INITIALIZED 0x01 /* cursor has been initialized and is valid */ -#define C_EOF 0x02 /* No more data */ -#define C_SUB 0x04 /* Cursor is a sub-cursor */ -#define C_DEL 0x08 /* last op was a cursor_del */ -#define C_UNTRACK 0x10 /* Un-track cursor when closing */ -#define C_RECLAIMING 0x20 /* GC lookup is prohibited */ -#define C_GCFREEZE 0x40 /* reclaimed_pglist must not be updated */ - unsigned mc_flags; /* see mdbx_cursor */ - MDBX_page *mc_pg[CURSOR_STACK]; /* stack of pushed pages */ - indx_t mc_ki[CURSOR_STACK]; /* stack of page indices */ -}; - -/* Context for sorted-dup records. - * We could have gone to a fully recursive design, with arbitrarily - * deep nesting of sub-databases. But for now we only handle these - * levels - main DB, optional sub-DB, sorted-duplicate DB. */ -typedef struct MDBX_xcursor { - /* A sub-cursor for traversing the Dup DB */ - MDBX_cursor mx_cursor; - /* The database record for this Dup DB */ - MDBX_db mx_db; - /* The auxiliary DB record for this Dup DB */ - MDBX_dbx mx_dbx; - /* The mt_dbflag for this Dup DB */ - uint8_t mx_dbflag; -} MDBX_xcursor; - -typedef struct MDBX_cursor_couple { - MDBX_cursor outer; - MDBX_xcursor inner; -} MDBX_cursor_couple; - -/* The database environment. */ -struct MDBX_env { -#define MDBX_ME_SIGNATURE UINT32_C(0x9A899641) - size_t me_signature; - mdbx_mmap_t me_dxb_mmap; /* The main data file */ -#define me_map me_dxb_mmap.dxb -#define me_lazy_fd me_dxb_mmap.fd - mdbx_filehandle_t me_dsync_fd; - mdbx_mmap_t me_lck_mmap; /* The lock file */ -#define me_lfd me_lck_mmap.fd -#define me_lck me_lck_mmap.lck - - /* Failed to update the meta page. Probably an I/O error. */ -#define MDBX_FATAL_ERROR UINT32_C(0x80000000) - /* Additional flag for mdbx_sync_locked() */ -#define MDBX_SHRINK_ALLOWED UINT32_C(0x40000000) - /* Some fields are initialized. */ -#define MDBX_ENV_ACTIVE UINT32_C(0x20000000) - /* me_txkey is set */ -#define MDBX_ENV_TXKEY UINT32_C(0x10000000) - uint32_t me_flags; /* see mdbx_env */ - unsigned me_psize; /* DB page size, inited from me_os_psize */ - unsigned me_psize2log; /* log2 of DB page size */ - unsigned me_os_psize; /* OS page size, from mdbx_syspagesize() */ - unsigned me_maxreaders; /* size of the reader table */ - mdbx_fastmutex_t me_dbi_lock; - MDBX_dbi me_numdbs; /* number of DBs opened */ - MDBX_dbi me_maxdbs; /* size of the DB table */ - uint32_t me_pid; /* process ID of this env */ - mdbx_thread_key_t me_txkey; /* thread-key for readers */ - char *me_path; /* path to the DB files */ - void *me_pbuf; /* scratch area for DUPSORT put() */ - MDBX_txn *me_txn; /* current write transaction */ - MDBX_txn *me_txn0; /* prealloc'd write transaction */ - - /* write-txn lock */ -#if MDBX_LOCKING == MDBX_LOCKING_SYSV - union { - key_t key; - int semid; - } me_sysv_ipc; -#endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */ - -#if MDBX_LOCKING > 0 - mdbx_ipclock_t *me_wlock; -#endif /* MDBX_LOCKING > 0 */ - - MDBX_dbx *me_dbxs; /* array of static DB info */ - uint16_t *me_dbflags; /* array of flags from MDBX_db.md_flags */ - unsigned *me_dbiseqs; /* array of dbi sequence numbers */ - volatile txnid_t *me_oldest; /* ID of oldest reader last time we looked */ - MDBX_page *me_dpages; /* list of malloc'd blocks for re-use */ - /* PNL of pages that became unused in a write txn */ - MDBX_PNL me_retired_pages; - /* MDBX_DP of pages written during a write txn. Length MDBX_DPL_TXNFULL. */ - MDBX_DPL me_dirtylist; - /* Number of freelist items that can fit in a single overflow page */ - unsigned me_maxgc_ov1page; - unsigned me_branch_nodemax; /* max size of a branch-node */ - uint16_t me_maxkey_nd, me_maxkey_ds; - unsigned me_maxval_nd, me_maxval_ds; - uint32_t me_live_reader; /* have liveness lock in reader table */ - void *me_userctx; /* User-settable context */ - volatile uint64_t *me_sync_timestamp; - volatile uint64_t *me_autosync_period; - volatile pgno_t *me_unsynced_pages; - volatile pgno_t *me_autosync_threshold; - volatile pgno_t *me_discarded_tail; - volatile uint32_t *me_meta_sync_txnid; - MDBX_oom_func *me_oom_func; /* Callback for kicking laggard readers */ - struct { -#if MDBX_LOCKING > 0 - mdbx_ipclock_t wlock; -#endif /* MDBX_LOCKING > 0 */ - txnid_t oldest; - uint64_t sync_timestamp; - uint64_t autosync_period; - pgno_t autosync_pending; - pgno_t autosync_threshold; - pgno_t discarded_tail; - uint32_t meta_sync_txnid; - } me_lckless_stub; -#if MDBX_DEBUG - MDBX_assert_func *me_assert_func; /* Callback for assertion failures */ -#endif -#ifdef MDBX_USE_VALGRIND - int me_valgrind_handle; -#endif -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - pgno_t me_poison_edge; -#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ - MDBX_env *me_lcklist_next; - - /* struct me_dbgeo used for accepting db-geo params from user for the new - * database creation, i.e. when mdbx_env_set_geometry() was called before - * mdbx_env_open(). */ - struct { - size_t lower; /* minimal size of datafile */ - size_t upper; /* maximal size of datafile */ - size_t now; /* current size of datafile */ - size_t grow; /* step to grow datafile */ - size_t shrink; /* threshold to shrink datafile */ - } me_dbgeo; - -#if defined(_WIN32) || defined(_WIN64) - MDBX_srwlock me_remap_guard; - /* Workaround for LockFileEx and WriteFile multithread bug */ - CRITICAL_SECTION me_windowsbug_lock; -#else - mdbx_fastmutex_t me_remap_guard; -#endif -}; - -/*----------------------------------------------------------------------------*/ -/* Debug and Logging stuff */ - -#define MDBX_RUNTIME_FLAGS_INIT \ - ((MDBX_DEBUG) > 0) * MDBX_DBG_ASSERT + ((MDBX_DEBUG) > 1) * MDBX_DBG_AUDIT - -#ifdef MDBX_ALLOY -static uint8_t mdbx_runtime_flags = MDBX_RUNTIME_FLAGS_INIT; -static uint8_t mdbx_loglevel = MDBX_DEBUG; -#else -extern uint8_t mdbx_runtime_flags; -extern uint8_t mdbx_loglevel; -#endif /* MDBX_ALLOY */ -MDBX_INTERNAL_VAR MDBX_debug_func *mdbx_debug_logger; - -MDBX_INTERNAL_FUNC void mdbx_debug_log(int type, const char *function, int line, - const char *fmt, ...) - __printf_args(4, 5); - -MDBX_INTERNAL_FUNC void mdbx_panic(const char *fmt, ...) __printf_args(1, 2); - -#if MDBX_DEBUG - -#define mdbx_assert_enabled() unlikely(mdbx_runtime_flags &MDBX_DBG_ASSERT) - -#define mdbx_audit_enabled() unlikely(mdbx_runtime_flags &MDBX_DBG_AUDIT) - -#ifdef MDBX_LOGLEVEL_BUILD -#define mdbx_log_enabled(msg) \ - (msg <= MDBX_LOGLEVEL_BUILD && unlikely(msg <= mdbx_loglevel)) -#else -#define mdbx_log_enabled(msg) unlikely(msg <= mdbx_loglevel) -#endif /* MDBX_LOGLEVEL_BUILD */ - -#else /* MDBX_DEBUG */ - -#define mdbx_audit_enabled() (0) - -#if !defined(NDEBUG) || defined(MDBX_FORCE_ASSERTIONS) -#define mdbx_assert_enabled() (1) -#else -#define mdbx_assert_enabled() (0) -#endif /* NDEBUG */ - -#ifdef MDBX_LOGLEVEL_BUILD -#define mdbx_log_enabled(msg) (msg <= MDBX_LOGLEVEL_BUILD) -#else -#define mdbx_log_enabled(msg) (0) -#endif /* MDBX_LOGLEVEL_BUILD */ - -#endif /* MDBX_DEBUG */ - -MDBX_INTERNAL_FUNC void mdbx_assert_fail(const MDBX_env *env, const char *msg, - const char *func, int line); - -#define mdbx_debug_extra(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_EXTRA)) \ - mdbx_debug_log(MDBX_LOG_EXTRA, __func__, __LINE__, fmt, __VA_ARGS__); \ - } while (0) - -#define mdbx_debug_extra_print(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_EXTRA)) \ - mdbx_debug_log(MDBX_LOG_EXTRA, NULL, 0, fmt, __VA_ARGS__); \ - } while (0) - -#define mdbx_trace(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_TRACE)) \ - mdbx_debug_log(MDBX_LOG_TRACE, __func__, __LINE__, fmt "\n", \ - __VA_ARGS__); \ - } while (0) - -#define mdbx_debug(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_DEBUG)) \ - mdbx_debug_log(MDBX_LOG_DEBUG, __func__, __LINE__, fmt "\n", \ - __VA_ARGS__); \ - } while (0) - -#define mdbx_verbose(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_VERBOSE)) \ - mdbx_debug_log(MDBX_LOG_VERBOSE, __func__, __LINE__, fmt "\n", \ - __VA_ARGS__); \ - } while (0) - -#define mdbx_notice(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_NOTICE)) \ - mdbx_debug_log(MDBX_LOG_NOTICE, __func__, __LINE__, fmt "\n", \ - __VA_ARGS__); \ - } while (0) - -#define mdbx_warning(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_WARN)) \ - mdbx_debug_log(MDBX_LOG_WARN, __func__, __LINE__, fmt "\n", \ - __VA_ARGS__); \ - } while (0) - -#define mdbx_error(fmt, ...) \ - do { \ - if (mdbx_log_enabled(MDBX_LOG_ERROR)) \ - mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, fmt "\n", \ - __VA_ARGS__); \ - } while (0) - -#define mdbx_fatal(fmt, ...) \ - mdbx_debug_log(MDBX_LOG_FATAL, __func__, __LINE__, fmt "\n", __VA_ARGS__); - -#define mdbx_ensure_msg(env, expr, msg) \ - do { \ - if (unlikely(!(expr))) \ - mdbx_assert_fail(env, msg, __func__, __LINE__); \ - } while (0) - -#define mdbx_ensure(env, expr) mdbx_ensure_msg(env, expr, #expr) - -/* assert(3) variant in environment context */ -#define mdbx_assert(env, expr) \ - do { \ - if (mdbx_assert_enabled()) \ - mdbx_ensure(env, expr); \ - } while (0) - -/* assert(3) variant in cursor context */ -#define mdbx_cassert(mc, expr) mdbx_assert((mc)->mc_txn->mt_env, expr) - -/* assert(3) variant in transaction context */ -#define mdbx_tassert(txn, expr) mdbx_assert((txn)->mt_env, expr) - -#ifndef MDBX_TOOLS /* Avoid using internal mdbx_assert() */ -#undef assert -#define assert(expr) mdbx_assert(NULL, expr) -#endif - -/*----------------------------------------------------------------------------*/ -/* Cache coherence and mmap invalidation */ - -#if MDBX_CPU_WRITEBACK_INCOHERENT -#define mdbx_flush_incoherent_cpu_writeback() mdbx_memory_barrier() -#else -#define mdbx_flush_incoherent_cpu_writeback() mdbx_compiler_barrier() -#endif /* MDBX_CPU_WRITEBACK_INCOHERENT */ - -static __maybe_unused __inline void -mdbx_flush_incoherent_mmap(void *addr, size_t nbytes, const intptr_t pagesize) { -#if MDBX_MMAP_INCOHERENT_FILE_WRITE - char *const begin = (char *)(-pagesize & (intptr_t)addr); - char *const end = - (char *)(-pagesize & (intptr_t)((char *)addr + nbytes + pagesize - 1)); - int err = msync(begin, end - begin, MS_SYNC | MS_INVALIDATE) ? errno : 0; - mdbx_assert(nullptr, err == 0); - (void)err; -#else - (void)pagesize; -#endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ - -#if MDBX_MMAP_INCOHERENT_CPU_CACHE -#ifdef DCACHE - /* MIPS has cache coherency issues. - * Note: for any nbytes >= on-chip cache size, entire is flushed. */ - cacheflush(addr, nbytes, DCACHE); -#else -#error "Oops, cacheflush() not available" -#endif /* DCACHE */ -#endif /* MDBX_MMAP_INCOHERENT_CPU_CACHE */ - -#if !MDBX_MMAP_INCOHERENT_FILE_WRITE && !MDBX_MMAP_INCOHERENT_CPU_CACHE - (void)addr; - (void)nbytes; -#endif -} - -/*----------------------------------------------------------------------------*/ -/* Internal prototypes */ - -MDBX_INTERNAL_FUNC int mdbx_reader_check0(MDBX_env *env, int rlocked, - int *dead); -MDBX_INTERNAL_FUNC int mdbx_rthc_alloc(mdbx_thread_key_t *key, - MDBX_reader *begin, MDBX_reader *end); -MDBX_INTERNAL_FUNC void mdbx_rthc_remove(const mdbx_thread_key_t key); - -MDBX_INTERNAL_FUNC void mdbx_rthc_global_init(void); -MDBX_INTERNAL_FUNC void mdbx_rthc_global_dtor(void); -MDBX_INTERNAL_FUNC void mdbx_rthc_thread_dtor(void *ptr); - -#define MDBX_IS_ERROR(rc) \ - ((rc) != MDBX_RESULT_TRUE && (rc) != MDBX_RESULT_FALSE) - -/* Internal error codes, not exposed outside libmdbx */ -#define MDBX_NO_ROOT (MDBX_LAST_LMDB_ERRCODE + 10) - -/* Debugging output value of a cursor DBI: Negative in a sub-cursor. */ -#define DDBI(mc) \ - (((mc)->mc_flags & C_SUB) ? -(int)(mc)->mc_dbi : (int)(mc)->mc_dbi) - -/* Key size which fits in a DKBUF. */ -#define DKBUF_MAXKEYSIZE 511 /* FIXME */ - -#if MDBX_DEBUG -#define DKBUF char _kbuf[DKBUF_MAXKEYSIZE * 4 + 2] -#define DKEY(x) mdbx_dump_val(x, _kbuf, DKBUF_MAXKEYSIZE * 2 + 1) -#define DVAL(x) \ - mdbx_dump_val(x, _kbuf + DKBUF_MAXKEYSIZE * 2 + 1, DKBUF_MAXKEYSIZE * 2 + 1) -#else -#define DKBUF ((void)(0)) -#define DKEY(x) ("-") -#define DVAL(x) ("-") -#endif - -/* An invalid page number. - * Mainly used to denote an empty tree. */ -#define P_INVALID (~(pgno_t)0) - -/* Test if the flags f are set in a flag word w. */ -#define F_ISSET(w, f) (((w) & (f)) == (f)) - -/* Round n up to an even number. */ -#define EVEN(n) (((n) + 1U) & -2) /* sign-extending -2 to match n+1U */ - -/* Default size of memory map. - * This is certainly too small for any actual applications. Apps should - * always set the size explicitly using mdbx_env_set_mapsize(). */ -#define DEFAULT_MAPSIZE MEGABYTE - -/* Number of slots in the reader table. - * This value was chosen somewhat arbitrarily. The 61 is a prime number, - * and such readers plus a couple mutexes fit into single 4KB page. - * Applications should set the table size using mdbx_env_set_maxreaders(). */ -#define DEFAULT_READERS 61 - -/* Test if a page is a leaf page */ -#define IS_LEAF(p) (((p)->mp_flags & P_LEAF) != 0) -/* Test if a page is a LEAF2 page */ -#define IS_LEAF2(p) unlikely(((p)->mp_flags & P_LEAF2) != 0) -/* Test if a page is a branch page */ -#define IS_BRANCH(p) (((p)->mp_flags & P_BRANCH) != 0) -/* Test if a page is an overflow page */ -#define IS_OVERFLOW(p) unlikely(((p)->mp_flags & P_OVERFLOW) != 0) -/* Test if a page is a sub page */ -#define IS_SUBP(p) (((p)->mp_flags & P_SUBP) != 0) -/* Test if a page is dirty */ -#define IS_DIRTY(p) (((p)->mp_flags & P_DIRTY) != 0) - -#define PAGETYPE(p) ((p)->mp_flags & (P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW)) - -/* Header for a single key/data pair within a page. - * Used in pages of type P_BRANCH and P_LEAF without P_LEAF2. - * We guarantee 2-byte alignment for 'MDBX_node's. - * - * mn_lo and mn_hi are used for data size on leaf nodes, and for child - * pgno on branch nodes. On 64 bit platforms, mn_flags is also used - * for pgno. (Branch nodes have no flags). Lo and hi are in host byte - * order in case some accesses can be optimized to 32-bit word access. - * - * Leaf node flags describe node contents. F_BIGDATA says the node's - * data part is the page number of an overflow page with actual data. - * F_DUPDATA and F_SUBDATA can be combined giving duplicate data in - * a sub-page/sub-database, and named databases (just F_SUBDATA). */ -typedef struct MDBX_node { -#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - union { - struct { - uint16_t mn_lo, mn_hi; /* part of data size or pgno */ - }; - uint32_t mn_dsize; - uint32_t mn_pgno32; - }; - uint8_t mn_flags; /* see mdbx_node flags */ - uint8_t mn_extra; - uint16_t mn_ksize; /* key size */ -#else - uint16_t mn_ksize; /* key size */ - uint8_t mn_extra; - uint8_t mn_flags; /* see mdbx_node flags */ - union { - uint32_t mn_pgno32; - uint32_t mn_dsize; - struct { - uint16_t mn_hi, mn_lo; /* part of data size or pgno */ - }; - }; -#endif /* __BYTE_ORDER__ */ - - /* mdbx_node Flags */ -#define F_BIGDATA 0x01 /* data put on overflow page */ -#define F_SUBDATA 0x02 /* data is a sub-database */ -#define F_DUPDATA 0x04 /* data has duplicates */ - - /* valid flags for mdbx_node_add() */ -#define NODE_ADD_FLAGS (F_DUPDATA | F_SUBDATA | MDBX_RESERVE | MDBX_APPEND) - uint8_t mn_data[/* C99 */]; /* key and data are appended here */ -} MDBX_node; - -#define MDBX_VALID 0x8000 /* DB handle is valid, for me_dbflags */ -#define PERSISTENT_FLAGS (0xffff & ~(MDBX_VALID)) -/* mdbx_dbi_open() flags */ -#define VALID_FLAGS \ - (MDBX_REVERSEKEY | MDBX_DUPSORT | MDBX_INTEGERKEY | MDBX_DUPFIXED | \ - MDBX_INTEGERDUP | MDBX_REVERSEDUP | MDBX_CREATE) - -/* max number of pages to commit in one writev() call */ -#define MDBX_COMMIT_PAGES 64 -#if defined(IOV_MAX) && IOV_MAX < MDBX_COMMIT_PAGES /* sysconf(_SC_IOV_MAX) */ -#undef MDBX_COMMIT_PAGES -#define MDBX_COMMIT_PAGES IOV_MAX -#endif - -/* - * / - * | -1, a < b - * CMP2INT(a,b) = < 0, a == b - * | 1, a > b - * \ - */ -#if 1 -/* LY: fast enough on most systems */ -#define CMP2INT(a, b) (((b) > (a)) ? -1 : (a) > (b)) -#else -#define CMP2INT(a, b) (((a) > (b)) - ((b) > (a))) -#endif - -/* Do not spill pages to disk if txn is getting full, may fail instead */ -#define MDBX_NOSPILL 0x8000 - -static __maybe_unused __inline pgno_t pgno_add(pgno_t base, pgno_t augend) { - assert(base <= MAX_PAGENO); - return (augend < MAX_PAGENO - base) ? base + augend : MAX_PAGENO; -} - -static __maybe_unused __inline pgno_t pgno_sub(pgno_t base, pgno_t subtrahend) { - assert(base >= MIN_PAGENO); - return (subtrahend < base - MIN_PAGENO) ? base - subtrahend : MIN_PAGENO; -} - -static __maybe_unused __inline void mdbx_jitter4testing(bool tiny) { -#if MDBX_DEBUG - if (MDBX_DBG_JITTER & mdbx_runtime_flags) - mdbx_osal_jitter(tiny); -#else - (void)tiny; -#endif -} - -static __pure_function __always_inline __maybe_unused bool -is_powerof2(size_t x) { - return (x & (x - 1)) == 0; -} - -static __pure_function __always_inline __maybe_unused size_t -roundup_powerof2(size_t value, size_t granularity) { - assert(is_powerof2(granularity)); - return (value + granularity - 1) & ~(granularity - 1); -} diff --git a/libs/libmdbx/src/src/elements/lck-posix.c b/libs/libmdbx/src/src/elements/lck-posix.c deleted file mode 100644 index 3754c25393..0000000000 --- a/libs/libmdbx/src/src/elements/lck-posix.c +++ /dev/null @@ -1,814 +0,0 @@ -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#if !(defined(_WIN32) || defined(_WIN64)) /* !Windows LCK-implementation */ - -#include "internals.h" -#include - -/*----------------------------------------------------------------------------*/ -/* global constructor/destructor */ - -#if defined(__linux__) || defined(__gnu_linux__) -#include -#ifndef MDBX_ALLOY -uint32_t mdbx_linux_kernel_version; -#endif /* MDBX_ALLOY */ -#endif /* Linux */ - -static __cold __attribute__((__constructor__)) void -mdbx_global_constructor(void) { -#if defined(__linux__) || defined(__gnu_linux__) - struct utsname buffer; - if (uname(&buffer) == 0) { - int i = 0; - char *p = buffer.release; - while (*p && i < 4) { - if (*p >= '0' && *p <= '9') { - long number = strtol(p, &p, 10); - if (number > 0) { - if (number > 255) - number = 255; - mdbx_linux_kernel_version += number << (24 - i * 8); - } - ++i; - } else { - ++p; - } - } - } -#endif /* Linux */ - - mdbx_rthc_global_init(); -} - -static __cold __attribute__((__destructor__)) void -mdbx_global_destructor(void) { - mdbx_rthc_global_dtor(); -} - -/*----------------------------------------------------------------------------*/ -/* lck */ - -/* Описание реализации блокировок для POSIX & Linux: - * - * lck-файл отображается в память, в нём организуется таблица читателей и - * размещаются совместно используемые posix-мьютексы (futex). Посредством - * этих мьютексов (см struct MDBX_lockinfo) реализуются: - * - Блокировка таблицы читателей для регистрации, - * т.е. функции mdbx_rdt_lock() и mdbx_rdt_unlock(). - * - Блокировка БД для пишущих транзакций, - * т.е. функции mdbx_txn_lock() и mdbx_txn_unlock(). - * - * Остальной функционал реализуется отдельно посредством файловых блокировок: - * - Первоначальный захват БД в режиме exclusive/shared и последующий перевод - * в операционный режим, функции mdbx_lck_seize() и mdbx_lck_downgrade(). - * - Проверка присутствие процессов-читателей, - * т.е. функции mdbx_rpid_set(), mdbx_rpid_clear() и mdbx_rpid_check(). - * - * Для блокировки файлов используется fcntl(F_SETLK), так как: - * - lockf() оперирует только эксклюзивной блокировкой и требует - * открытия файла в RW-режиме. - * - flock() не гарантирует атомарности при смене блокировок - * и оперирует только всем файлом целиком. - * - Для контроля процессов-читателей используются однобайтовые - * range-блокировки lck-файла посредством fcntl(F_SETLK). При этом - * в качестве позиции используется pid процесса-читателя. - * - Для первоначального захвата и shared/exclusive выполняется блокировка - * основного файла БД и при успехе lck-файла. - * - * ---------------------------------------------------------------------------- - * УДЕРЖИВАЕМЫЕ БЛОКИРОВКИ В ЗАВИСИМОСТИ ОТ РЕЖИМА И СОСТОЯНИЯ - * - * Эксклюзивный режим без lck-файла: - * = заблокирован весь dxb-файл посредством F_RDLCK или F_WRLCK, - * в зависимости от MDBX_RDONLY. - * - * Не-операционный режим на время пере-инициализации и разрушении lck-файла: - * = F_WRLCK блокировка первого байта lck-файла, другие процессы ждут её - * снятия при получении F_RDLCK через F_SETLKW. - * - блокировки dxb-файла могут меняться до снятие эксклюзивной блокировки - * lck-файла: - * + для НЕ-эксклюзивного режима блокировка pid-байта в dxb-файле - * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. - * + для ЭКСКЛЮЗИВНОГО режима блокировка pid-байта всего dxb-файла - * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. - * - * ОПЕРАЦИОННЫЙ режим с lck-файлом: - * = F_RDLCK блокировка первого байта lck-файла, другие процессы не могут - * получить F_WRLCK и таким образом видят что БД используется. - * + F_WRLCK блокировка pid-байта в clk-файле после первой транзакции чтения. - * + для НЕ-эксклюзивного режима блокировка pid-байта в dxb-файле - * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. - * + для ЭКСКЛЮЗИВНОГО режима блокировка pid-байта всего dxb-файла - * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. - */ - -#if MDBX_USE_OFDLOCKS -static int op_setlk, op_setlkw, op_getlk; -static void __cold choice_fcntl() { - assert(!op_setlk && !op_setlkw && !op_getlk); - if ((mdbx_runtime_flags & MDBX_DBG_LEGACY_MULTIOPEN) == 0 -#if defined(__linux__) || defined(__gnu_linux__) - && mdbx_linux_kernel_version > - 0x030f0000 /* OFD locks are available since 3.15, but engages here - only for 3.16 and larer kernels (LTS) for reliability reasons */ -#endif /* linux */ - ) { - op_setlk = F_OFD_SETLK; - op_setlkw = F_OFD_SETLKW; - op_getlk = F_OFD_GETLK; - return; - } - op_setlk = F_SETLK; - op_setlkw = F_SETLKW; - op_getlk = F_GETLK; -} -#else -#define op_setlk F_SETLK -#define op_setlkw F_SETLKW -#define op_getlk F_GETLK -#endif /* MDBX_USE_OFDLOCKS */ - -#ifndef OFF_T_MAX -#define OFF_T_MAX \ - ((sizeof(off_t) > 4 ? INT64_MAX : INT32_MAX) & ~(size_t)0xffff) -#endif - -static int lck_op(mdbx_filehandle_t fd, int cmd, int lck, off_t offset, - off_t len) { - mdbx_jitter4testing(true); - for (;;) { - struct flock lock_op; - memset(&lock_op, 0, sizeof(lock_op)); - lock_op.l_type = lck; - lock_op.l_whence = SEEK_SET; - lock_op.l_start = offset; - lock_op.l_len = len; - int rc = fcntl(fd, cmd, &lock_op); - mdbx_jitter4testing(true); - if (rc != -1) { - if (cmd == op_getlk) { - /* Checks reader by pid. Returns: - * MDBX_RESULT_TRUE - if pid is live (reader holds a lock). - * MDBX_RESULT_FALSE - if pid is dead (a lock could be placed). */ - return (lock_op.l_type == F_UNLCK) ? MDBX_RESULT_FALSE - : MDBX_RESULT_TRUE; - } - return MDBX_SUCCESS; - } - rc = errno; - if (rc != EINTR || cmd == op_setlkw) { - mdbx_assert(nullptr, MDBX_IS_ERROR(rc)); - return rc; - } - } -} - -MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env) { - assert(env->me_lfd != INVALID_HANDLE_VALUE); - assert(env->me_pid > 0); - if (unlikely(mdbx_getpid() != env->me_pid)) - return MDBX_PANIC; - return lck_op(env->me_lfd, op_setlk, F_WRLCK, env->me_pid, 1); -} - -MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env) { - assert(env->me_lfd != INVALID_HANDLE_VALUE); - assert(env->me_pid > 0); - return lck_op(env->me_lfd, op_setlk, F_UNLCK, env->me_pid, 1); -} - -MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid) { - assert(env->me_lfd != INVALID_HANDLE_VALUE); - assert(pid > 0); - return lck_op(env->me_lfd, op_getlk, F_WRLCK, pid, 1); -} - -/*---------------------------------------------------------------------------*/ - -#if MDBX_LOCKING > MDBX_LOCKING_SYSV -MDBX_INTERNAL_FUNC int mdbx_ipclock_stub(mdbx_ipclock_t *ipc) { -#if MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - return sem_init(ipc, false, 1) ? errno : 0; -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ - MDBX_LOCKING == MDBX_LOCKING_POSIX2008 - return pthread_mutex_init(ipc, nullptr); -#else -#error "FIXME" -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_ipclock_destroy(mdbx_ipclock_t *ipc) { -#if MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - return sem_destroy(ipc) ? errno : 0; -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ - MDBX_LOCKING == MDBX_LOCKING_POSIX2008 - return pthread_mutex_destroy(ipc); -#else -#error "FIXME" -#endif -} -#endif /* MDBX_LOCKING > MDBX_LOCKING_SYSV */ - -static int check_fstat(MDBX_env *env) { - struct stat st; - - int rc = MDBX_SUCCESS; - if (fstat(env->me_lazy_fd, &st)) { - rc = errno; - mdbx_error("fstat(%s), err %d", "DXB", rc); - return rc; - } - - if (!S_ISREG(st.st_mode) || st.st_nlink < 1) { -#ifdef EBADFD - rc = EBADFD; -#else - rc = EPERM; -#endif - mdbx_error("%s %s, err %d", "DXB", - (st.st_nlink < 1) ? "file was removed" : "not a regular file", - rc); - return rc; - } - - if (st.st_size < (off_t)(MDBX_MIN_PAGESIZE * NUM_METAS)) { - mdbx_verbose("dxb-file is too short (%u), exclusive-lock needed", - (unsigned)st.st_size); - rc = MDBX_RESULT_TRUE; - } - - //---------------------------------------------------------------------------- - - if (fstat(env->me_lfd, &st)) { - rc = errno; - mdbx_error("fstat(%s), err %d", "LCK", rc); - return rc; - } - - if (!S_ISREG(st.st_mode) || st.st_nlink < 1) { -#ifdef EBADFD - rc = EBADFD; -#else - rc = EPERM; -#endif - mdbx_error("%s %s, err %d", "LCK", - (st.st_nlink < 1) ? "file was removed" : "not a regular file", - rc); - return rc; - } - - /* Checking file size for detect the situation when we got the shared lock - * immediately after mdbx_lck_destroy(). */ - if (st.st_size < (off_t)(sizeof(MDBX_lockinfo) + sizeof(MDBX_reader))) { - mdbx_verbose("lck-file is too short (%u), exclusive-lock needed", - (unsigned)st.st_size); - rc = MDBX_RESULT_TRUE; - } - - return rc; -} - -MDBX_INTERNAL_FUNC int __cold mdbx_lck_seize(MDBX_env *env) { - assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); - if (unlikely(mdbx_getpid() != env->me_pid)) - return MDBX_PANIC; -#if MDBX_USE_OFDLOCKS - if (unlikely(op_setlk == 0)) - choice_fcntl(); -#endif /* MDBX_USE_OFDLOCKS */ - - int rc = MDBX_SUCCESS; - if (env->me_lfd == INVALID_HANDLE_VALUE) { - /* LY: without-lck mode (e.g. exclusive or on read-only filesystem) */ - rc = - lck_op(env->me_lazy_fd, op_setlk, - (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, 0, OFF_T_MAX); - if (rc != MDBX_SUCCESS) { - mdbx_error("%s, err %u", "without-lck", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - return MDBX_RESULT_TRUE /* Done: return with exclusive locking. */; - } -#if defined(_POSIX_PRIORITY_SCHEDULING) && _POSIX_PRIORITY_SCHEDULING > 0 - sched_yield(); -#endif - -retry: - if (rc == MDBX_RESULT_TRUE) { - rc = lck_op(env->me_lfd, op_setlk, F_UNLCK, 0, 1); - if (rc != MDBX_SUCCESS) { - mdbx_error("%s, err %u", "unlock-before-retry", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - } - - /* Firstly try to get exclusive locking. */ - rc = lck_op(env->me_lfd, op_setlk, F_WRLCK, 0, 1); - if (rc == MDBX_SUCCESS) { - rc = check_fstat(env); - if (MDBX_IS_ERROR(rc)) - return rc; - - continue_dxb_exclusive: - rc = - lck_op(env->me_lazy_fd, op_setlk, - (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, 0, OFF_T_MAX); - if (rc == MDBX_SUCCESS) - return MDBX_RESULT_TRUE /* Done: return with exclusive locking. */; - - int err = check_fstat(env); - if (MDBX_IS_ERROR(err)) - return err; - - /* the cause may be a collision with POSIX's file-lock recovery. */ - if (!(rc == EAGAIN || rc == EACCES || rc == EBUSY || rc == EWOULDBLOCK || - rc == EDEADLK)) { - mdbx_error("%s, err %u", "dxb-exclusive", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - - /* Fallback to lck-shared */ - } else if (!(rc == EAGAIN || rc == EACCES || rc == EBUSY || - rc == EWOULDBLOCK || rc == EDEADLK)) { - mdbx_error("%s, err %u", "try-exclusive", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - - /* Here could be one of two: - * - mdbx_lck_destroy() from the another process was hold the lock - * during a destruction. - * - either mdbx_lck_seize() from the another process was got the exclusive - * lock and doing initialization. - * For distinguish these cases will use size of the lck-file later. */ - - /* Wait for lck-shared now. */ - /* Here may be await during transient processes, for instance until another - * competing process doesn't call lck_downgrade(). */ - rc = lck_op(env->me_lfd, op_setlkw, F_RDLCK, 0, 1); - if (rc != MDBX_SUCCESS) { - mdbx_error("%s, err %u", "try-shared", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - - rc = check_fstat(env); - if (rc == MDBX_RESULT_TRUE) - goto retry; - if (rc != MDBX_SUCCESS) { - mdbx_error("%s, err %u", "lck_fstat", rc); - return rc; - } - - /* got shared, retry exclusive */ - rc = lck_op(env->me_lfd, op_setlk, F_WRLCK, 0, 1); - if (rc == MDBX_SUCCESS) - goto continue_dxb_exclusive; - - if (!(rc == EAGAIN || rc == EACCES || rc == EBUSY || rc == EWOULDBLOCK || - rc == EDEADLK)) { - mdbx_error("%s, err %u", "try-exclusive", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - - /* Lock against another process operating in without-lck or exclusive mode. */ - rc = - lck_op(env->me_lazy_fd, op_setlk, - (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, env->me_pid, 1); - if (rc != MDBX_SUCCESS) { - mdbx_error("%s, err %u", "lock-against-without-lck", rc); - mdbx_assert(env, MDBX_IS_ERROR(rc)); - return rc; - } - - /* Done: return with shared locking. */ - return MDBX_RESULT_FALSE; -} - -MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env) { - assert(env->me_lfd != INVALID_HANDLE_VALUE); - if (unlikely(mdbx_getpid() != env->me_pid)) - return MDBX_PANIC; - - int rc = MDBX_SUCCESS; - if ((env->me_flags & MDBX_EXCLUSIVE) == 0) { - rc = lck_op(env->me_lazy_fd, op_setlk, F_UNLCK, 0, env->me_pid); - if (rc == MDBX_SUCCESS) - rc = lck_op(env->me_lazy_fd, op_setlk, F_UNLCK, env->me_pid + 1, - OFF_T_MAX - env->me_pid - 1); - } - if (rc == MDBX_SUCCESS) - rc = lck_op(env->me_lfd, op_setlk, F_RDLCK, 0, 1); - if (unlikely(rc != 0)) { - mdbx_error("%s, err %u", "lck", rc); - assert(MDBX_IS_ERROR(rc)); - } - return rc; -} - -MDBX_INTERNAL_FUNC int __cold mdbx_lck_destroy(MDBX_env *env, - MDBX_env *inprocess_neighbor) { - if (unlikely(mdbx_getpid() != env->me_pid)) - return MDBX_PANIC; - - int rc = MDBX_SUCCESS; - struct stat lck_info; - if (env->me_lfd != INVALID_HANDLE_VALUE && !inprocess_neighbor && - env->me_lck && - /* try get exclusive access */ - lck_op(env->me_lfd, op_setlk, F_WRLCK, 0, OFF_T_MAX) == 0 && - /* if LCK was not removed */ - fstat(env->me_lfd, &lck_info) == 0 && lck_info.st_nlink > 0 && - lck_op(env->me_lazy_fd, op_setlk, - (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, 0, - OFF_T_MAX) == 0) { - - mdbx_verbose("%p got exclusive, drown locks", (void *)env); -#if MDBX_LOCKING == MDBX_LOCKING_SYSV - if (env->me_sysv_ipc.semid != -1) - rc = semctl(env->me_sysv_ipc.semid, 2, IPC_RMID) ? errno : 0; -#else - rc = mdbx_ipclock_destroy(&env->me_lck->mti_rlock); - if (rc == 0) - rc = mdbx_ipclock_destroy(&env->me_lck->mti_wlock); -#endif /* MDBX_LOCKING */ - - mdbx_assert(env, rc == 0); - if (rc == 0) { - mdbx_munmap(&env->me_lck_mmap); - rc = ftruncate(env->me_lfd, 0) ? errno : 0; - } - - mdbx_jitter4testing(false); - } - - /* 1) POSIX's fcntl() locks (i.e. when op_setlk == F_SETLK) should be restored - * after file was closed. - * - * 2) File locks would be released (by kernel) while the file-descriptors will - * be closed. But to avoid false-positive EACCESS and EDEADLK from the kernel, - * locks should be released here explicitly with properly order. */ - - /* close dxb and restore lock */ - if (env->me_dsync_fd != INVALID_HANDLE_VALUE) { - if (unlikely(close(env->me_dsync_fd) != 0) && rc == MDBX_SUCCESS) - rc = errno; - env->me_dsync_fd = INVALID_HANDLE_VALUE; - } - if (env->me_lazy_fd != INVALID_HANDLE_VALUE) { - if (unlikely(close(env->me_lazy_fd) != 0) && rc == MDBX_SUCCESS) - rc = errno; - env->me_lazy_fd = INVALID_HANDLE_VALUE; - if (op_setlk == F_SETLK && inprocess_neighbor && rc == MDBX_SUCCESS) { - /* restore file-lock */ - rc = lck_op( - inprocess_neighbor->me_lazy_fd, F_SETLKW, - (inprocess_neighbor->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, - (inprocess_neighbor->me_flags & MDBX_EXCLUSIVE) - ? 0 - : inprocess_neighbor->me_pid, - (inprocess_neighbor->me_flags & MDBX_EXCLUSIVE) ? OFF_T_MAX : 1); - } - } - - /* close clk and restore locks */ - if (env->me_lfd != INVALID_HANDLE_VALUE) { - if (unlikely(close(env->me_lfd) != 0) && rc == MDBX_SUCCESS) - rc = errno; - env->me_lfd = INVALID_HANDLE_VALUE; - if (op_setlk == F_SETLK && inprocess_neighbor && rc == MDBX_SUCCESS) { - /* restore file-locks */ - rc = lck_op(inprocess_neighbor->me_lfd, F_SETLKW, F_RDLCK, 0, 1); - if (rc == MDBX_SUCCESS && inprocess_neighbor->me_live_reader) - rc = mdbx_rpid_set(inprocess_neighbor); - } - } - - if (inprocess_neighbor && rc != MDBX_SUCCESS) - inprocess_neighbor->me_flags |= MDBX_FATAL_ERROR; - return rc; -} - -/*---------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC int __cold mdbx_lck_init(MDBX_env *env, - MDBX_env *inprocess_neighbor, - int global_uniqueness_flag) { - if (inprocess_neighbor) - return MDBX_SUCCESS /* currently don't need any initialization - if LCK already opened/used inside current process */ - ; -#if MDBX_LOCKING == MDBX_LOCKING_SYSV - int semid = -1; - if (global_uniqueness_flag) { - struct stat st; - if (fstat(env->me_lazy_fd, &st)) - return errno; - sysv_retry_create: - semid = semget(env->me_sysv_ipc.key, 2, - IPC_CREAT | IPC_EXCL | - (st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO))); - if (unlikely(semid == -1)) { - int err = errno; - if (err != EEXIST) - return err; - - /* remove and re-create semaphore set */ - semid = semget(env->me_sysv_ipc.key, 2, 0); - if (semid == -1) { - err = errno; - if (err != ENOENT) - return err; - goto sysv_retry_create; - } - if (semctl(semid, 2, IPC_RMID)) { - err = errno; - if (err != EIDRM) - return err; - } - goto sysv_retry_create; - } - - unsigned short val_array[2] = {1, 1}; - if (semctl(semid, 2, SETALL, val_array)) - return errno; - } else { - semid = semget(env->me_sysv_ipc.key, 2, 0); - if (semid == -1) - return errno; - - /* check read & write access */ - struct semid_ds data[2]; - if (semctl(semid, 2, IPC_STAT, data) || semctl(semid, 2, IPC_SET, data)) - return errno; - } - - env->me_sysv_ipc.semid = semid; - - return MDBX_SUCCESS; - -#elif MDBX_LOCKING == MDBX_LOCKING_FUTEX -#warning "TODO" -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - - /* don't initialize semaphores twice */ - if (global_uniqueness_flag == MDBX_RESULT_TRUE) { - if (sem_init(&env->me_lck->mti_rlock, true, 1)) - return errno; - if (sem_init(&env->me_lck->mti_wlock, true, 1)) - return errno; - } - return MDBX_SUCCESS; - -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ - MDBX_LOCKING == MDBX_LOCKING_POSIX2008 - - /* FIXME: Unfortunately, there is no other reliable way but to long testing - * on each platform. On the other hand, behavior like FreeBSD is incorrect - * and we can expect it to be rare. Moreover, even on FreeBSD without - * additional in-process initialization, the probability of an problem - * occurring is vanishingly small, and the symptom is a return of EINVAL - * while locking a mutex. In other words, in the worst case, the problem - * results in an EINVAL error at the start of the transaction, but NOT data - * loss, nor database corruption, nor other fatal troubles. Thus, the code - * below I am inclined to think the workaround for erroneous platforms (like - * FreeBSD), rather than a defect of libmdbx. */ -#if defined(__FreeBSD__) - /* seems that shared mutexes on FreeBSD required in-process initialization */ - (void)global_uniqueness_flag; -#else - /* shared mutexes on many other platforms (including Darwin and Linux's - * futexes) doesn't need any addition in-process initialization */ - if (global_uniqueness_flag != MDBX_RESULT_TRUE) - return MDBX_SUCCESS; -#endif - - pthread_mutexattr_t ma; - int rc = pthread_mutexattr_init(&ma); - if (rc) - return rc; - - rc = pthread_mutexattr_setpshared(&ma, PTHREAD_PROCESS_SHARED); - if (rc) - goto bailout; - -#if MDBX_LOCKING == MDBX_LOCKING_POSIX2008 -#if defined(PTHREAD_MUTEX_ROBUST) || defined(pthread_mutexattr_setrobust) - rc = pthread_mutexattr_setrobust(&ma, PTHREAD_MUTEX_ROBUST); -#elif defined(PTHREAD_MUTEX_ROBUST_NP) || \ - defined(pthread_mutexattr_setrobust_np) - rc = pthread_mutexattr_setrobust_np(&ma, PTHREAD_MUTEX_ROBUST_NP); -#elif _POSIX_THREAD_PROCESS_SHARED < 200809L - rc = pthread_mutexattr_setrobust_np(&ma, PTHREAD_MUTEX_ROBUST_NP); -#else - rc = pthread_mutexattr_setrobust(&ma, PTHREAD_MUTEX_ROBUST); -#endif - if (rc) - goto bailout; -#endif /* MDBX_LOCKING == MDBX_LOCKING_POSIX2008 */ - -#if defined(_POSIX_THREAD_PRIO_INHERIT) && _POSIX_THREAD_PRIO_INHERIT >= 0 && \ - !defined(MDBX_SAFE4QEMU) - rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT); - if (rc == ENOTSUP) - rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_NONE); - if (rc && rc != ENOTSUP) - goto bailout; -#endif /* PTHREAD_PRIO_INHERIT */ - - rc = pthread_mutexattr_settype(&ma, PTHREAD_MUTEX_ERRORCHECK); - if (rc && rc != ENOTSUP) - goto bailout; - - rc = pthread_mutex_init(&env->me_lck->mti_rlock, &ma); - if (rc) - goto bailout; - rc = pthread_mutex_init(&env->me_lck->mti_wlock, &ma); - -bailout: - pthread_mutexattr_destroy(&ma); - return rc; -#else -#error "FIXME" -#endif /* MDBX_LOCKING > 0 */ -} - -static int __cold mdbx_ipclock_failed(MDBX_env *env, mdbx_ipclock_t *ipc, - const int err) { - int rc = err; -#if MDBX_LOCKING == MDBX_LOCKING_POSIX2008 || MDBX_LOCKING == MDBX_LOCKING_SYSV - if (err == EOWNERDEAD) { - /* We own the mutex. Clean up after dead previous owner. */ - - const bool rlocked = (env->me_lck && ipc == &env->me_lck->mti_rlock); - rc = MDBX_SUCCESS; - if (!rlocked) { - if (unlikely(env->me_txn)) { - /* env is hosed if the dead thread was ours */ - env->me_flags |= MDBX_FATAL_ERROR; - env->me_txn = NULL; - rc = MDBX_PANIC; - } - } - mdbx_notice("%clock owner died, %s", (rlocked ? 'r' : 'w'), - (rc ? "this process' env is hosed" : "recovering")); - - int check_rc = mdbx_reader_check0(env, rlocked, NULL); - check_rc = (check_rc == MDBX_SUCCESS) ? MDBX_RESULT_TRUE : check_rc; - -#if MDBX_LOCKING == MDBX_LOCKING_SYSV - rc = (rc == MDBX_SUCCESS) ? check_rc : rc; -#else -#if defined(PTHREAD_MUTEX_ROBUST) || defined(pthread_mutex_consistent) - int mreco_rc = pthread_mutex_consistent(ipc); -#elif defined(PTHREAD_MUTEX_ROBUST_NP) || defined(pthread_mutex_consistent_np) - int mreco_rc = pthread_mutex_consistent_np(ipc); -#elif _POSIX_THREAD_PROCESS_SHARED < 200809L - int mreco_rc = pthread_mutex_consistent_np(ipc); -#else - int mreco_rc = pthread_mutex_consistent(ipc); -#endif - check_rc = (mreco_rc == 0) ? check_rc : mreco_rc; - - if (unlikely(mreco_rc)) - mdbx_error("lock recovery failed, %s", mdbx_strerror(mreco_rc)); - - rc = (rc == MDBX_SUCCESS) ? check_rc : rc; - if (MDBX_IS_ERROR(rc)) - pthread_mutex_unlock(ipc); -#endif /* MDBX_LOCKING == MDBX_LOCKING_POSIX2008 */ - return rc; - } -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 - (void)ipc; -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - (void)ipc; -#elif MDBX_LOCKING == MDBX_LOCKING_FUTEX -#warning "TODO" - (void)ipc; -#else -#error "FIXME" -#endif /* MDBX_LOCKING */ - - mdbx_error("mutex (un)lock failed, %s", mdbx_strerror(err)); - if (rc != EDEADLK) - env->me_flags |= MDBX_FATAL_ERROR; - return rc; -} - -static int mdbx_ipclock_lock(MDBX_env *env, mdbx_ipclock_t *ipc, - const bool dont_wait) { -#if MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ - MDBX_LOCKING == MDBX_LOCKING_POSIX2008 - int rc = dont_wait ? pthread_mutex_trylock(ipc) : pthread_mutex_lock(ipc); - rc = (rc == EBUSY && dont_wait) ? MDBX_BUSY : rc; -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - int rc = MDBX_SUCCESS; - if (dont_wait) { - if (sem_trywait(ipc)) { - rc = errno; - if (rc == EAGAIN) - rc = MDBX_BUSY; - } - } else if (sem_wait(ipc)) - rc = errno; -#elif MDBX_LOCKING == MDBX_LOCKING_SYSV - struct sembuf op = {.sem_num = (ipc != env->me_wlock), - .sem_op = -1, - .sem_flg = dont_wait ? IPC_NOWAIT | SEM_UNDO : SEM_UNDO}; - int rc; - if (semop(env->me_sysv_ipc.semid, &op, 1)) { - rc = errno; - if (dont_wait && rc == EAGAIN) - rc = MDBX_BUSY; - } else { - rc = *ipc ? EOWNERDEAD : MDBX_SUCCESS; - *ipc = env->me_pid; - } -#else -#error "FIXME" -#endif /* MDBX_LOCKING */ - - if (unlikely(rc != MDBX_SUCCESS && rc != MDBX_BUSY)) - rc = mdbx_ipclock_failed(env, ipc, rc); - return rc; -} - -static int mdbx_ipclock_unlock(MDBX_env *env, mdbx_ipclock_t *ipc) { -#if MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ - MDBX_LOCKING == MDBX_LOCKING_POSIX2008 - int rc = pthread_mutex_unlock(ipc); - (void)env; -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - int rc = sem_post(ipc) ? errno : MDBX_SUCCESS; - (void)env; -#elif MDBX_LOCKING == MDBX_LOCKING_SYSV - if (unlikely(*ipc != (pid_t)env->me_pid)) - return EPERM; - *ipc = 0; - struct sembuf op = { - .sem_num = (ipc != env->me_wlock), .sem_op = 1, .sem_flg = SEM_UNDO}; - int rc = semop(env->me_sysv_ipc.semid, &op, 1) ? errno : MDBX_SUCCESS; -#else -#error "FIXME" -#endif /* MDBX_LOCKING */ - return rc; -} - -MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env) { - mdbx_trace("%s", ">>"); - mdbx_jitter4testing(true); - int rc = mdbx_ipclock_lock(env, &env->me_lck->mti_rlock, false); - mdbx_trace("<< rc %d", rc); - return rc; -} - -MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env) { - mdbx_trace("%s", ">>"); - int rc = mdbx_ipclock_unlock(env, &env->me_lck->mti_rlock); - mdbx_trace("<< rc %d", rc); - if (unlikely(rc != MDBX_SUCCESS)) - mdbx_panic("%s() failed: err %d\n", __func__, rc); - mdbx_jitter4testing(true); -} - -int mdbx_txn_lock(MDBX_env *env, bool dont_wait) { - mdbx_trace("%swait %s", dont_wait ? "dont-" : "", ">>"); - mdbx_jitter4testing(true); - int rc = mdbx_ipclock_lock(env, env->me_wlock, dont_wait); - mdbx_trace("<< rc %d", rc); - return MDBX_IS_ERROR(rc) ? rc : MDBX_SUCCESS; -} - -void mdbx_txn_unlock(MDBX_env *env) { - mdbx_trace("%s", ">>"); - int rc = mdbx_ipclock_unlock(env, env->me_wlock); - mdbx_trace("<< rc %d", rc); - if (unlikely(rc != MDBX_SUCCESS)) - mdbx_panic("%s() failed: err %d\n", __func__, rc); - mdbx_jitter4testing(true); -} - -#else -#ifdef _MSC_VER -#pragma warning(disable : 4206) /* nonstandard extension used: translation \ - unit is empty */ -#endif /* _MSC_VER (warnings) */ -#endif /* !Windows LCK-implementation */ diff --git a/libs/libmdbx/src/src/elements/lck-windows.c b/libs/libmdbx/src/src/elements/lck-windows.c deleted file mode 100644 index 13178139ea..0000000000 --- a/libs/libmdbx/src/src/elements/lck-windows.c +++ /dev/null @@ -1,801 +0,0 @@ -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#if defined(_WIN32) || defined(_WIN64) /* Windows LCK-implementation */ - -/* PREAMBLE FOR WINDOWS: - * - * We are not concerned for performance here. - * If you are running Windows a performance could NOT be the goal. - * Otherwise please use Linux. */ - -#include "internals.h" - -static void mdbx_winnt_import(void); - -#if MDBX_BUILD_SHARED_LIBRARY -#if MDBX_AVOID_CRT && defined(NDEBUG) -/* DEBUG/CHECKED builds still require MSVC's CRT for runtime checks. - * - * Define dll's entry point only for Release build when NDEBUG is defined and - * MDBX_AVOID_CRT=ON. if the entry point isn't defined then MSVC's will - * automatically use DllMainCRTStartup() from CRT library, which also - * automatically call DllMain() from our mdbx.dll */ -#pragma comment(linker, "/ENTRY:DllMain") -#endif /* MDBX_AVOID_CRT */ - -BOOL APIENTRY DllMain(HANDLE module, DWORD reason, LPVOID reserved) -#else -#if !MDBX_CONFIG_MANUAL_TLS_CALLBACK -static -#endif /* !MDBX_CONFIG_MANUAL_TLS_CALLBACK */ - void NTAPI - mdbx_dll_handler(PVOID module, DWORD reason, PVOID reserved) -#endif /* MDBX_BUILD_SHARED_LIBRARY */ -{ - (void)reserved; - switch (reason) { - case DLL_PROCESS_ATTACH: - mdbx_winnt_import(); - mdbx_rthc_global_init(); - break; - case DLL_PROCESS_DETACH: - mdbx_rthc_global_dtor(); - break; - - case DLL_THREAD_ATTACH: - break; - case DLL_THREAD_DETACH: - mdbx_rthc_thread_dtor(module); - break; - } -#if MDBX_BUILD_SHARED_LIBRARY - return TRUE; -#endif -} - -#if !MDBX_BUILD_SHARED_LIBRARY && !MDBX_CONFIG_MANUAL_TLS_CALLBACK -/* *INDENT-OFF* */ -/* clang-format off */ -#if defined(_MSC_VER) -# pragma const_seg(push) -# pragma data_seg(push) - -# ifdef _WIN64 - /* kick a linker to create the TLS directory if not already done */ -# pragma comment(linker, "/INCLUDE:_tls_used") - /* Force some symbol references. */ -# pragma comment(linker, "/INCLUDE:mdbx_tls_anchor") - /* specific const-segment for WIN64 */ -# pragma const_seg(".CRT$XLB") - const -# else - /* kick a linker to create the TLS directory if not already done */ -# pragma comment(linker, "/INCLUDE:__tls_used") - /* Force some symbol references. */ -# pragma comment(linker, "/INCLUDE:_mdbx_tls_anchor") - /* specific data-segment for WIN32 */ -# pragma data_seg(".CRT$XLB") -# endif - - __declspec(allocate(".CRT$XLB")) PIMAGE_TLS_CALLBACK mdbx_tls_anchor = mdbx_dll_handler; -# pragma data_seg(pop) -# pragma const_seg(pop) - -#elif defined(__GNUC__) -# ifdef _WIN64 - const -# endif - PIMAGE_TLS_CALLBACK mdbx_tls_anchor __attribute__((__section__(".CRT$XLB"), used)) = mdbx_dll_handler; -#else -# error FIXME -#endif -/* *INDENT-ON* */ -/* clang-format on */ -#endif /* !MDBX_BUILD_SHARED_LIBRARY && !MDBX_CONFIG_MANUAL_TLS_CALLBACK */ - -/*----------------------------------------------------------------------------*/ - -#define LCK_SHARED 0 -#define LCK_EXCLUSIVE LOCKFILE_EXCLUSIVE_LOCK -#define LCK_WAITFOR 0 -#define LCK_DONTWAIT LOCKFILE_FAIL_IMMEDIATELY - -static __inline BOOL flock(mdbx_filehandle_t fd, DWORD flags, uint64_t offset, - size_t bytes) { - OVERLAPPED ov; - ov.hEvent = 0; - ov.Offset = (DWORD)offset; - ov.OffsetHigh = HIGH_DWORD(offset); - return LockFileEx(fd, flags, 0, (DWORD)bytes, HIGH_DWORD(bytes), &ov); -} - -static __inline BOOL funlock(mdbx_filehandle_t fd, uint64_t offset, - size_t bytes) { - return UnlockFile(fd, (DWORD)offset, HIGH_DWORD(offset), (DWORD)bytes, - HIGH_DWORD(bytes)); -} - -/*----------------------------------------------------------------------------*/ -/* global `write` lock for write-txt processing, - * exclusive locking both meta-pages) */ - -#define LCK_MAXLEN (1u + (size_t)(MAXSSIZE_T)) -#define LCK_META_OFFSET 0 -#define LCK_META_LEN 0x10000u -#define LCK_BODY_OFFSET LCK_META_LEN -#define LCK_BODY_LEN (LCK_MAXLEN - LCK_BODY_OFFSET) -#define LCK_META LCK_META_OFFSET, LCK_META_LEN -#define LCK_BODY LCK_BODY_OFFSET, LCK_BODY_LEN -#define LCK_WHOLE 0, LCK_MAXLEN - -int mdbx_txn_lock(MDBX_env *env, bool dontwait) { - if (dontwait) { - if (!TryEnterCriticalSection(&env->me_windowsbug_lock)) - return MDBX_BUSY; - } else { - EnterCriticalSection(&env->me_windowsbug_lock); - } - - if ((env->me_flags & MDBX_EXCLUSIVE) || - flock(env->me_lazy_fd, - dontwait ? (LCK_EXCLUSIVE | LCK_DONTWAIT) - : (LCK_EXCLUSIVE | LCK_WAITFOR), - LCK_BODY)) - return MDBX_SUCCESS; - int rc = GetLastError(); - LeaveCriticalSection(&env->me_windowsbug_lock); - return (!dontwait || rc != ERROR_LOCK_VIOLATION) ? rc : MDBX_BUSY; -} - -void mdbx_txn_unlock(MDBX_env *env) { - int rc = (env->me_flags & MDBX_EXCLUSIVE) - ? TRUE - : funlock(env->me_lazy_fd, LCK_BODY); - LeaveCriticalSection(&env->me_windowsbug_lock); - if (!rc) - mdbx_panic("%s failed: err %u", __func__, GetLastError()); -} - -/*----------------------------------------------------------------------------*/ -/* global `read` lock for readers registration, - * exclusive locking `mti_numreaders` (second) cacheline */ - -#define LCK_LO_OFFSET 0 -#define LCK_LO_LEN offsetof(MDBX_lockinfo, mti_numreaders) -#define LCK_UP_OFFSET LCK_LO_LEN -#define LCK_UP_LEN (sizeof(MDBX_lockinfo) - LCK_UP_OFFSET) -#define LCK_LOWER LCK_LO_OFFSET, LCK_LO_LEN -#define LCK_UPPER LCK_UP_OFFSET, LCK_UP_LEN - -MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env) { - mdbx_srwlock_AcquireShared(&env->me_remap_guard); - if (env->me_lfd == INVALID_HANDLE_VALUE) - return MDBX_SUCCESS; /* readonly database in readonly filesystem */ - - /* transite from S-? (used) to S-E (locked), e.g. exclusive lock upper-part */ - if ((env->me_flags & MDBX_EXCLUSIVE) || - flock(env->me_lfd, LCK_EXCLUSIVE | LCK_WAITFOR, LCK_UPPER)) - return MDBX_SUCCESS; - - int rc = GetLastError(); - mdbx_srwlock_ReleaseShared(&env->me_remap_guard); - return rc; -} - -MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env) { - if (env->me_lfd != INVALID_HANDLE_VALUE) { - /* transite from S-E (locked) to S-? (used), e.g. unlock upper-part */ - if ((env->me_flags & MDBX_EXCLUSIVE) == 0 && - !funlock(env->me_lfd, LCK_UPPER)) - mdbx_panic("%s failed: err %u", __func__, GetLastError()); - } - mdbx_srwlock_ReleaseShared(&env->me_remap_guard); -} - -static int suspend_and_append(mdbx_handle_array_t **array, - const DWORD ThreadId) { - const unsigned limit = (*array)->limit; - if ((*array)->count == limit) { - void *ptr = mdbx_realloc( - (limit > ARRAY_LENGTH((*array)->handles)) - ? *array - : /* don't free initial array on the stack */ NULL, - sizeof(mdbx_handle_array_t) + - sizeof(HANDLE) * (limit * 2 - ARRAY_LENGTH((*array)->handles))); - if (!ptr) - return MDBX_ENOMEM; - if (limit == ARRAY_LENGTH((*array)->handles)) - memcpy(ptr, *array, sizeof(mdbx_handle_array_t)); - *array = (mdbx_handle_array_t *)ptr; - (*array)->limit = limit * 2; - } - - HANDLE hThread = OpenThread(THREAD_SUSPEND_RESUME | THREAD_QUERY_INFORMATION, - FALSE, ThreadId); - if (hThread == NULL) - return GetLastError(); - - if (SuspendThread(hThread) == -1) { - int err = GetLastError(); - DWORD ExitCode; - if (err == /* workaround for Win10 UCRT bug */ ERROR_ACCESS_DENIED || - !GetExitCodeThread(hThread, &ExitCode) || ExitCode != STILL_ACTIVE) - err = MDBX_SUCCESS; - CloseHandle(hThread); - return err; - } - - (*array)->handles[(*array)->count++] = hThread; - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int -mdbx_suspend_threads_before_remap(MDBX_env *env, mdbx_handle_array_t **array) { - const size_t CurrentTid = GetCurrentThreadId(); - int rc; - if (env->me_lck) { - /* Scan LCK for threads of the current process */ - const MDBX_reader *const begin = env->me_lck->mti_readers; - const MDBX_reader *const end = begin + env->me_lck->mti_numreaders; - const size_t WriteTxnOwner = env->me_txn0 ? env->me_txn0->mt_owner : 0; - for (const MDBX_reader *reader = begin; reader < end; ++reader) { - if (reader->mr_pid != env->me_pid || !reader->mr_tid) { - skip_lck: - continue; - } - if (reader->mr_tid == CurrentTid || reader->mr_tid == WriteTxnOwner) - goto skip_lck; - if (env->me_flags & MDBX_NOTLS) { - /* Skip duplicates in no-tls mode */ - for (const MDBX_reader *scan = reader; --scan >= begin;) - if (scan->mr_tid == reader->mr_tid) - goto skip_lck; - } - - rc = suspend_and_append(array, (mdbx_tid_t)reader->mr_tid); - if (rc != MDBX_SUCCESS) { - bailout_lck: - (void)mdbx_resume_threads_after_remap(*array); - return rc; - } - } - if (WriteTxnOwner && WriteTxnOwner != CurrentTid) { - rc = suspend_and_append(array, (mdbx_tid_t)WriteTxnOwner); - if (rc != MDBX_SUCCESS) - goto bailout_lck; - } - } else { - /* Without LCK (i.e. read-only mode). - * Walk thougth a snapshot of all running threads */ - mdbx_assert(env, - env->me_txn0 == NULL || (env->me_flags & MDBX_EXCLUSIVE) != 0); - const HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0); - if (hSnapshot == INVALID_HANDLE_VALUE) - return GetLastError(); - - THREADENTRY32 entry; - entry.dwSize = sizeof(THREADENTRY32); - - if (!Thread32First(hSnapshot, &entry)) { - rc = GetLastError(); - bailout_toolhelp: - CloseHandle(hSnapshot); - (void)mdbx_resume_threads_after_remap(*array); - return rc; - } - - do { - if (entry.th32OwnerProcessID != env->me_pid || - entry.th32ThreadID == CurrentTid) - continue; - - rc = suspend_and_append(array, entry.th32ThreadID); - if (rc != MDBX_SUCCESS) - goto bailout_toolhelp; - - } while (Thread32Next(hSnapshot, &entry)); - - rc = GetLastError(); - if (rc != ERROR_NO_MORE_FILES) - goto bailout_toolhelp; - CloseHandle(hSnapshot); - } - - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int -mdbx_resume_threads_after_remap(mdbx_handle_array_t *array) { - int rc = MDBX_SUCCESS; - for (unsigned i = 0; i < array->count; ++i) { - const HANDLE hThread = array->handles[i]; - if (ResumeThread(hThread) == -1) { - const int err = GetLastError(); - DWORD ExitCode; - if (err != /* workaround for Win10 UCRT bug */ ERROR_ACCESS_DENIED && - GetExitCodeThread(hThread, &ExitCode) && ExitCode == STILL_ACTIVE) - rc = err; - } - CloseHandle(hThread); - } - return rc; -} - -/*----------------------------------------------------------------------------*/ -/* global `initial` lock for lockfile initialization, - * exclusive/shared locking first cacheline */ - -/* Briefly descritpion of locking schema/algorithm: - * - Windows does not support upgrading or downgrading for file locking. - * - Therefore upgrading/downgrading is emulated by shared and exclusive - * locking of upper and lower halves. - * - In other words, we have FSM with possible 9 states, - * i.e. free/shared/exclusive x free/shared/exclusive == 9. - * Only 6 states of FSM are used, which 2 of ones are transitive. - * - * The mdbx_lck_seize() moves the locking-FSM from the initial free/unlocked - * state to the "exclusive write" (and returns MDBX_RESULT_TRUE) if possible, - * or to the "used" (and returns MDBX_RESULT_FALSE). - * - * The mdbx_lck_downgrade() moves the locking-FSM from "exclusive write" - * state to the "used" (i.e. shared) state. - * - * States: - * ?-? = free, i.e. unlocked - * S-? = used, i.e. shared lock - * E-? = exclusive-read, i.e. operational exclusive - * ?-S - * ?-E = middle (transitive state) - * S-S - * S-E = locked (transitive state) - * E-S - * E-E = exclusive-write, i.e. exclusive due (re)initialization - */ - -static void lck_unlock(MDBX_env *env) { - int err; - - if (env->me_lfd != INVALID_HANDLE_VALUE) { - /* double `unlock` for robustly remove overlapped shared/exclusive locks */ - while (funlock(env->me_lfd, LCK_LOWER)) - ; - err = GetLastError(); - assert(err == ERROR_NOT_LOCKED || - (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); - (void)err; - SetLastError(ERROR_SUCCESS); - - while (funlock(env->me_lfd, LCK_UPPER)) - ; - err = GetLastError(); - assert(err == ERROR_NOT_LOCKED || - (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); - (void)err; - SetLastError(ERROR_SUCCESS); - } - - if (env->me_lazy_fd != INVALID_HANDLE_VALUE) { - /* explicitly unlock to avoid latency for other processes (windows kernel - * releases such locks via deferred queues) */ - while (funlock(env->me_lazy_fd, LCK_BODY)) - ; - err = GetLastError(); - assert(err == ERROR_NOT_LOCKED || - (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); - (void)err; - SetLastError(ERROR_SUCCESS); - - while (funlock(env->me_lazy_fd, LCK_META)) - ; - err = GetLastError(); - assert(err == ERROR_NOT_LOCKED || - (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); - (void)err; - SetLastError(ERROR_SUCCESS); - - while (funlock(env->me_lazy_fd, LCK_WHOLE)) - ; - err = GetLastError(); - assert(err == ERROR_NOT_LOCKED || - (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); - (void)err; - SetLastError(ERROR_SUCCESS); - } -} - -MDBX_INTERNAL_FUNC int mdbx_lck_init(MDBX_env *env, - MDBX_env *inprocess_neighbor, - int global_uniqueness_flag) { - (void)env; - (void)inprocess_neighbor; - (void)global_uniqueness_flag; - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_lck_destroy(MDBX_env *env, - MDBX_env *inprocess_neighbor) { - (void)inprocess_neighbor; - - /* LY: should unmap before releasing the locks to avoid race condition and - * STATUS_USER_MAPPED_FILE/ERROR_USER_MAPPED_FILE */ - if (env->me_map) - mdbx_munmap(&env->me_dxb_mmap); - if (env->me_lck) - mdbx_munmap(&env->me_lck_mmap); - - lck_unlock(env); - return MDBX_SUCCESS; -} - -/* Seize state as 'exclusive-write' (E-E and returns MDBX_RESULT_TRUE) - * or as 'used' (S-? and returns MDBX_RESULT_FALSE). - * Oherwise returns an error. */ -static int internal_seize_lck(HANDLE lfd) { - int rc; - assert(lfd != INVALID_HANDLE_VALUE); - - /* 1) now on ?-? (free), get ?-E (middle) */ - mdbx_jitter4testing(false); - if (!flock(lfd, LCK_EXCLUSIVE | LCK_WAITFOR, LCK_UPPER)) { - rc = GetLastError() /* 2) something went wrong, give up */; - mdbx_error("%s, err %u", "?-?(free) >> ?-E(middle)", rc); - return rc; - } - - /* 3) now on ?-E (middle), try E-E (exclusive-write) */ - mdbx_jitter4testing(false); - if (flock(lfd, LCK_EXCLUSIVE | LCK_DONTWAIT, LCK_LOWER)) - return MDBX_RESULT_TRUE /* 4) got E-E (exclusive-write), done */; - - /* 5) still on ?-E (middle) */ - rc = GetLastError(); - mdbx_jitter4testing(false); - if (rc != ERROR_SHARING_VIOLATION && rc != ERROR_LOCK_VIOLATION) { - /* 6) something went wrong, give up */ - if (!funlock(lfd, LCK_UPPER)) - mdbx_panic("%s(%s) failed: err %u", __func__, "?-E(middle) >> ?-?(free)", - GetLastError()); - return rc; - } - - /* 7) still on ?-E (middle), try S-E (locked) */ - mdbx_jitter4testing(false); - rc = flock(lfd, LCK_SHARED | LCK_DONTWAIT, LCK_LOWER) ? MDBX_RESULT_FALSE - : GetLastError(); - - mdbx_jitter4testing(false); - if (rc != MDBX_RESULT_FALSE) - mdbx_error("%s, err %u", "?-E(middle) >> S-E(locked)", rc); - - /* 8) now on S-E (locked) or still on ?-E (middle), - * transite to S-? (used) or ?-? (free) */ - if (!funlock(lfd, LCK_UPPER)) - mdbx_panic("%s(%s) failed: err %u", __func__, - "X-E(locked/middle) >> X-?(used/free)", GetLastError()); - - /* 9) now on S-? (used, DONE) or ?-? (free, FAILURE) */ - return rc; -} - -MDBX_INTERNAL_FUNC int mdbx_lck_seize(MDBX_env *env) { - int rc; - - assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); - if (env->me_flags & MDBX_EXCLUSIVE) - return MDBX_RESULT_TRUE /* nope since files were must be opened - non-shareable */ - ; - - if (env->me_lfd == INVALID_HANDLE_VALUE) { - /* LY: without-lck mode (e.g. on read-only filesystem) */ - mdbx_jitter4testing(false); - if (!flock(env->me_lazy_fd, LCK_SHARED | LCK_DONTWAIT, LCK_WHOLE)) { - rc = GetLastError(); - mdbx_error("%s, err %u", "without-lck", rc); - return rc; - } - return MDBX_RESULT_FALSE; - } - - rc = internal_seize_lck(env->me_lfd); - mdbx_jitter4testing(false); - if (rc == MDBX_RESULT_TRUE && (env->me_flags & MDBX_RDONLY) == 0) { - /* Check that another process don't operates in without-lck mode. - * Doing such check by exclusive locking the body-part of db. Should be - * noted: - * - we need an exclusive lock for do so; - * - we can't lock meta-pages, otherwise other process could get an error - * while opening db in valid (non-conflict) mode. */ - if (!flock(env->me_lazy_fd, LCK_EXCLUSIVE | LCK_DONTWAIT, LCK_BODY)) { - rc = GetLastError(); - mdbx_error("%s, err %u", "lock-against-without-lck", rc); - mdbx_jitter4testing(false); - lck_unlock(env); - } else { - mdbx_jitter4testing(false); - if (!funlock(env->me_lazy_fd, LCK_BODY)) - mdbx_panic("%s(%s) failed: err %u", __func__, - "unlock-against-without-lck", GetLastError()); - } - } - - return rc; -} - -MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env) { - /* Transite from exclusive state (E-?) to used (S-?) */ - assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); - assert(env->me_lfd != INVALID_HANDLE_VALUE); - -#if 1 - if (env->me_flags & MDBX_EXCLUSIVE) - return MDBX_SUCCESS /* nope since files were must be opened non-shareable */ - ; -#else - /* 1) must be at E-E (exclusive-write) */ - if (env->me_flags & MDBX_EXCLUSIVE) { - /* transite from E-E to E_? (exclusive-read) */ - if (!funlock(env->me_lfd, LCK_UPPER)) - mdbx_panic("%s(%s) failed: err %u", __func__, - "E-E(exclusive-write) >> E-?(exclusive-read)", GetLastError()); - return MDBX_SUCCESS /* 2) now at E-? (exclusive-read), done */; - } -#endif - - /* 3) now at E-E (exclusive-write), transite to ?_E (middle) */ - if (!funlock(env->me_lfd, LCK_LOWER)) - mdbx_panic("%s(%s) failed: err %u", __func__, - "E-E(exclusive-write) >> ?-E(middle)", GetLastError()); - - /* 4) now at ?-E (middle), transite to S-E (locked) */ - if (!flock(env->me_lfd, LCK_SHARED | LCK_DONTWAIT, LCK_LOWER)) { - int rc = GetLastError() /* 5) something went wrong, give up */; - mdbx_error("%s, err %u", "?-E(middle) >> S-E(locked)", rc); - return rc; - } - - /* 6) got S-E (locked), continue transition to S-? (used) */ - if (!funlock(env->me_lfd, LCK_UPPER)) - mdbx_panic("%s(%s) failed: err %u", __func__, "S-E(locked) >> S-?(used)", - GetLastError()); - - return MDBX_SUCCESS /* 7) now at S-? (used), done */; -} - -/*----------------------------------------------------------------------------*/ -/* reader checking (by pid) */ - -MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env) { - (void)env; - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env) { - (void)env; - return MDBX_SUCCESS; -} - -/* Checks reader by pid. - * - * Returns: - * MDBX_RESULT_TRUE, if pid is live (unable to acquire lock) - * MDBX_RESULT_FALSE, if pid is dead (lock acquired) - * or otherwise the errcode. */ -MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid) { - (void)env; - HANDLE hProcess = OpenProcess(SYNCHRONIZE, FALSE, pid); - int rc; - if (likely(hProcess)) { - rc = WaitForSingleObject(hProcess, 0); - if (unlikely(rc == WAIT_FAILED)) - rc = GetLastError(); - CloseHandle(hProcess); - } else { - rc = GetLastError(); - } - - switch (rc) { - case ERROR_INVALID_PARAMETER: - /* pid seems invalid */ - return MDBX_RESULT_FALSE; - case WAIT_OBJECT_0: - /* process just exited */ - return MDBX_RESULT_FALSE; - case ERROR_ACCESS_DENIED: - /* The ERROR_ACCESS_DENIED would be returned for CSRSS-processes, etc. - * assume pid exists */ - return MDBX_RESULT_TRUE; - case WAIT_TIMEOUT: - /* pid running */ - return MDBX_RESULT_TRUE; - default: - /* failure */ - return rc; - } -} - -//---------------------------------------------------------------------------- -// Stub for slim read-write lock -// Copyright (C) 1995-2002 Brad Wilson - -static void WINAPI stub_srwlock_Init(MDBX_srwlock *srwl) { - srwl->readerCount = srwl->writerCount = 0; -} - -static void WINAPI stub_srwlock_AcquireShared(MDBX_srwlock *srwl) { - while (true) { - assert(srwl->writerCount >= 0 && srwl->readerCount >= 0); - - // If there's a writer already, spin without unnecessarily - // interlocking the CPUs - if (srwl->writerCount != 0) { - YieldProcessor(); - continue; - } - - // Add to the readers list - _InterlockedIncrement(&srwl->readerCount); - - // Check for writers again (we may have been pre-empted). If - // there are no writers writing or waiting, then we're done. - if (srwl->writerCount == 0) - break; - - // Remove from the readers list, spin, try again - _InterlockedDecrement(&srwl->readerCount); - YieldProcessor(); - } -} - -static void WINAPI stub_srwlock_ReleaseShared(MDBX_srwlock *srwl) { - assert(srwl->readerCount > 0); - _InterlockedDecrement(&srwl->readerCount); -} - -static void WINAPI stub_srwlock_AcquireExclusive(MDBX_srwlock *srwl) { - while (true) { - assert(srwl->writerCount >= 0 && srwl->readerCount >= 0); - - // If there's a writer already, spin without unnecessarily - // interlocking the CPUs - if (srwl->writerCount != 0) { - YieldProcessor(); - continue; - } - - // See if we can become the writer (expensive, because it inter- - // locks the CPUs, so writing should be an infrequent process) - if (_InterlockedExchange(&srwl->writerCount, 1) == 0) - break; - } - - // Now we're the writer, but there may be outstanding readers. - // Spin until there aren't any more; new readers will wait now - // that we're the writer. - while (srwl->readerCount != 0) { - assert(srwl->writerCount >= 0 && srwl->readerCount >= 0); - YieldProcessor(); - } -} - -static void WINAPI stub_srwlock_ReleaseExclusive(MDBX_srwlock *srwl) { - assert(srwl->writerCount == 1 && srwl->readerCount >= 0); - srwl->writerCount = 0; -} - -MDBX_srwlock_function mdbx_srwlock_Init, mdbx_srwlock_AcquireShared, - mdbx_srwlock_ReleaseShared, mdbx_srwlock_AcquireExclusive, - mdbx_srwlock_ReleaseExclusive; - -/*----------------------------------------------------------------------------*/ - -#if 0 /* LY: unused for now */ -static DWORD WINAPI stub_DiscardVirtualMemory(PVOID VirtualAddress, - SIZE_T Size) { - return VirtualAlloc(VirtualAddress, Size, MEM_RESET, PAGE_NOACCESS) - ? ERROR_SUCCESS - : GetLastError(); -} -#endif /* unused for now */ - -static uint64_t WINAPI stub_GetTickCount64(void) { - LARGE_INTEGER Counter, Frequency; - return (QueryPerformanceFrequency(&Frequency) && - QueryPerformanceCounter(&Counter)) - ? Counter.QuadPart * 1000ul / Frequency.QuadPart - : 0; -} - -/*----------------------------------------------------------------------------*/ -#ifndef MDBX_ALLOY -MDBX_NtExtendSection mdbx_NtExtendSection; -MDBX_GetFileInformationByHandleEx mdbx_GetFileInformationByHandleEx; -MDBX_GetVolumeInformationByHandleW mdbx_GetVolumeInformationByHandleW; -MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW; -MDBX_SetFileInformationByHandle mdbx_SetFileInformationByHandle; -MDBX_NtFsControlFile mdbx_NtFsControlFile; -MDBX_PrefetchVirtualMemory mdbx_PrefetchVirtualMemory; -MDBX_GetTickCount64 mdbx_GetTickCount64; -#if 0 /* LY: unused for now */ -MDBX_DiscardVirtualMemory mdbx_DiscardVirtualMemory; -MDBX_OfferVirtualMemory mdbx_OfferVirtualMemory; -MDBX_ReclaimVirtualMemory mdbx_ReclaimVirtualMemory; -#endif /* unused for now */ -#endif /* MDBX_ALLOY */ - -static void mdbx_winnt_import(void) { - const HINSTANCE hNtdll = GetModuleHandleA("ntdll.dll"); - -#define GET_PROC_ADDR(dll, ENTRY) \ - mdbx_##ENTRY = (MDBX_##ENTRY)GetProcAddress(dll, #ENTRY) - - if (GetProcAddress(hNtdll, "wine_get_version")) { - assert(mdbx_RunningUnderWine()); - } else { - GET_PROC_ADDR(hNtdll, NtFsControlFile); - GET_PROC_ADDR(hNtdll, NtExtendSection); - assert(!mdbx_RunningUnderWine()); - } - - const HINSTANCE hKernel32dll = GetModuleHandleA("kernel32.dll"); - GET_PROC_ADDR(hKernel32dll, GetFileInformationByHandleEx); - GET_PROC_ADDR(hKernel32dll, GetTickCount64); - if (!mdbx_GetTickCount64) - mdbx_GetTickCount64 = stub_GetTickCount64; - if (!mdbx_RunningUnderWine()) { - GET_PROC_ADDR(hKernel32dll, SetFileInformationByHandle); - GET_PROC_ADDR(hKernel32dll, GetVolumeInformationByHandleW); - GET_PROC_ADDR(hKernel32dll, GetFinalPathNameByHandleW); - GET_PROC_ADDR(hKernel32dll, PrefetchVirtualMemory); - } - -#if 0 /* LY: unused for now */ - if (!mdbx_RunningUnderWine()) { - GET_PROC_ADDR(hKernel32dll, DiscardVirtualMemory); - GET_PROC_ADDR(hKernel32dll, OfferVirtualMemory); - GET_PROC_ADDR(hKernel32dll, ReclaimVirtualMemory); - } - if (!mdbx_DiscardVirtualMemory) - mdbx_DiscardVirtualMemory = stub_DiscardVirtualMemory; - if (!mdbx_OfferVirtualMemory) - mdbx_OfferVirtualMemory = stub_OfferVirtualMemory; - if (!mdbx_ReclaimVirtualMemory) - mdbx_ReclaimVirtualMemory = stub_ReclaimVirtualMemory; -#endif /* unused for now */ - -#undef GET_PROC_ADDR - - const MDBX_srwlock_function init = - (MDBX_srwlock_function)GetProcAddress(hKernel32dll, "InitializeSRWLock"); - if (init != NULL) { - mdbx_srwlock_Init = init; - mdbx_srwlock_AcquireShared = (MDBX_srwlock_function)GetProcAddress( - hKernel32dll, "AcquireSRWLockShared"); - mdbx_srwlock_ReleaseShared = (MDBX_srwlock_function)GetProcAddress( - hKernel32dll, "ReleaseSRWLockShared"); - mdbx_srwlock_AcquireExclusive = (MDBX_srwlock_function)GetProcAddress( - hKernel32dll, "AcquireSRWLockExclusive"); - mdbx_srwlock_ReleaseExclusive = (MDBX_srwlock_function)GetProcAddress( - hKernel32dll, "ReleaseSRWLockExclusive"); - } else { - mdbx_srwlock_Init = stub_srwlock_Init; - mdbx_srwlock_AcquireShared = stub_srwlock_AcquireShared; - mdbx_srwlock_ReleaseShared = stub_srwlock_ReleaseShared; - mdbx_srwlock_AcquireExclusive = stub_srwlock_AcquireExclusive; - mdbx_srwlock_ReleaseExclusive = stub_srwlock_ReleaseExclusive; - } -} - -#endif /* Windows LCK-implementation */ diff --git a/libs/libmdbx/src/src/elements/ntdll.def b/libs/libmdbx/src/src/elements/ntdll.def deleted file mode 100644 index e3a6e33c94..0000000000 --- a/libs/libmdbx/src/src/elements/ntdll.def +++ /dev/null @@ -1,1244 +0,0 @@ -LIBRARY ntdll -EXPORTS -CsrAllocateCaptureBuffer -CsrAllocateMessagePointer -CsrCaptureMessageBuffer -CsrCaptureMessageMultiUnicodeStringsInPlace -CsrCaptureMessageString -CsrCaptureTimeout -CsrClientCallServer -CsrClientConnectToServer -CsrFreeCaptureBuffer -CsrGetProcessId -CsrIdentifyAlertableThread -CsrSetPriorityClass -DbgBreakPoint -DbgPrint -DbgPrintEx -DbgPrintReturnControlC -DbgPrompt -DbgQueryDebugFilterState -DbgSetDebugFilterState -DbgUiConnectToDbg -DbgUiContinue -DbgUiConvertStateChangeStructure -DbgUiDebugActiveProcess -DbgUiGetThreadDebugObject -DbgUiIssueRemoteBreakin -DbgUiRemoteBreakin -DbgUiSetThreadDebugObject -DbgUiStopDebugging -DbgUiWaitStateChange -DbgUserBreakPoint -KiRaiseUserExceptionDispatcher -KiUserApcDispatcher -KiUserCallbackDispatcher -KiUserExceptionDispatcher -LdrAccessResource -LdrAddRefDll -LdrDisableThreadCalloutsForDll -LdrEnumResources -LdrEnumerateLoadedModules -LdrFindEntryForAddress -LdrFindResourceDirectory_U -LdrFindResourceEx_U -LdrFindResource_U -LdrFlushAlternateResourceModules -LdrGetDllHandle -LdrGetDllHandleEx -LdrGetProcedureAddress -LdrInitShimEngineDynamic -LdrInitializeThunk -LdrLoadAlternateResourceModule -LdrLoadDll -LdrLockLoaderLock -LdrProcessRelocationBlock -LdrQueryImageFileExecutionOptions -LdrQueryProcessModuleInformation -LdrSetAppCompatDllRedirectionCallback -LdrSetDllManifestProber -LdrShutdownProcess -LdrShutdownThread -LdrUnloadAlternateResourceModule -LdrUnloadDll -LdrUnlockLoaderLock -LdrVerifyImageMatchesChecksum -NlsAnsiCodePage -NlsMbCodePageTag -NlsMbOemCodePageTag -NtAcceptConnectPort -NtAccessCheck -NtAccessCheckAndAuditAlarm -NtAccessCheckByType -NtAccessCheckByTypeAndAuditAlarm -NtAccessCheckByTypeResultList -NtAccessCheckByTypeResultListAndAuditAlarm -NtAccessCheckByTypeResultListAndAuditAlarmByHandle -NtAddAtom -NtAddBootEntry -NtAdjustGroupsToken -NtAdjustPrivilegesToken -NtAlertResumeThread -NtAlertThread -NtAllocateLocallyUniqueId -NtAllocateUserPhysicalPages -NtAllocateUuids -NtAllocateVirtualMemory -NtAreMappedFilesTheSame -NtAssignProcessToJobObject -NtCallbackReturn -NtCancelIoFile -NtCancelTimer -NtClearEvent -NtClose -NtCloseObjectAuditAlarm -NtCompactKeys -NtCompareTokens -NtCompleteConnectPort -NtCompressKey -NtConnectPort -NtContinue -NtCreateDebugObject -NtCreateDirectoryObject -NtCreateEvent -NtCreateEventPair -NtCreateFile -NtCreateIoCompletion -NtCreateJobObject -NtCreateJobSet -NtCreateKey -NtCreateKeyedEvent -NtCreateMailslotFile -NtCreateMutant -NtCreateNamedPipeFile -NtCreatePagingFile -NtCreatePort -NtCreateProcess -NtCreateProcessEx -NtCreateProfile -NtCreateSection -NtCreateSemaphore -NtCreateSymbolicLinkObject -NtCreateThread -NtCreateTimer -NtCreateToken -NtCreateWaitablePort -NtDebugActiveProcess -NtDebugContinue -NtDelayExecution -NtDeleteAtom -NtDeleteBootEntry -NtDeleteFile -NtDeleteKey -NtDeleteObjectAuditAlarm -NtDeleteValueKey -NtDeviceIoControlFile -NtDisplayString -NtDuplicateObject -NtDuplicateToken -NtEnumerateBootEntries -NtEnumerateKey -NtEnumerateSystemEnvironmentValuesEx -NtEnumerateValueKey -NtExtendSection -NtFilterToken -NtFindAtom -NtFlushBuffersFile -NtFlushInstructionCache -NtFlushKey -NtFlushVirtualMemory -NtFlushWriteBuffer -NtFreeUserPhysicalPages -NtFreeVirtualMemory -NtFsControlFile -NtGetContextThread -NtGetDevicePowerState -NtGetWriteWatch -NtImpersonateAnonymousToken -NtImpersonateClientOfPort -NtImpersonateThread -NtInitializeRegistry -NtInitiatePowerAction -NtIsProcessInJob -NtIsSystemResumeAutomatic -NtListenPort -NtLoadDriver -NtLoadKey -NtLoadKey2 -NtLockFile -NtLockProductActivationKeys -NtLockRegistryKey -NtLockVirtualMemory -NtMakePermanentObject -NtMakeTemporaryObject -NtMapUserPhysicalPages -NtMapUserPhysicalPagesScatter -NtMapViewOfSection -NtModifyBootEntry -NtNotifyChangeDirectoryFile -NtNotifyChangeKey -NtNotifyChangeMultipleKeys -NtOpenDirectoryObject -NtOpenEvent -NtOpenEventPair -NtOpenFile -NtOpenIoCompletion -NtOpenJobObject -NtOpenKey -NtOpenKeyedEvent -NtOpenMutant -NtOpenObjectAuditAlarm -NtOpenProcess -NtOpenProcessToken -NtOpenProcessTokenEx -NtOpenSection -NtOpenSemaphore -NtOpenSymbolicLinkObject -NtOpenThread -NtOpenThreadToken -NtOpenThreadTokenEx -NtOpenTimer -NtPlugPlayControl -NtPowerInformation -NtPrivilegeCheck -NtPrivilegeObjectAuditAlarm -NtPrivilegedServiceAuditAlarm -NtProtectVirtualMemory -NtPulseEvent -NtQueryAttributesFile -NtQueryBootEntryOrder -NtQueryBootOptions -NtQueryDebugFilterState -NtQueryDefaultLocale -NtQueryDefaultUILanguage -NtQueryDirectoryFile -NtQueryDirectoryObject -NtQueryEaFile -NtQueryEvent -NtQueryFullAttributesFile -NtQueryInformationAtom -NtQueryInformationFile -NtQueryInformationJobObject -NtQueryInformationPort -NtQueryInformationProcess -NtQueryInformationThread -NtQueryInformationToken -NtQueryInstallUILanguage -NtQueryIntervalProfile -NtQueryIoCompletion -NtQueryKey -NtQueryMultipleValueKey -NtQueryMutant -NtQueryObject -NtQueryOpenSubKeys -NtQueryPerformanceCounter -NtQueryPortInformationProcess -NtQueryQuotaInformationFile -NtQuerySection -NtQuerySecurityObject -NtQuerySemaphore -NtQuerySymbolicLinkObject -NtQuerySystemEnvironmentValue -NtQuerySystemEnvironmentValueEx -NtQuerySystemInformation -NtQuerySystemTime -NtQueryTimer -NtQueryTimerResolution -NtQueryValueKey -NtQueryVirtualMemory -NtQueryVolumeInformationFile -NtQueueApcThread -NtRaiseException -NtRaiseHardError -NtReadFile -NtReadFileScatter -NtReadRequestData -NtReadVirtualMemory -NtRegisterThreadTerminatePort -NtReleaseKeyedEvent -NtReleaseMutant -NtReleaseSemaphore -NtRemoveIoCompletion -NtRemoveProcessDebug -NtRenameKey -NtReplaceKey -NtReplyPort -NtReplyWaitReceivePort -NtReplyWaitReceivePortEx -NtReplyWaitReplyPort -NtRequestPort -NtRequestWaitReplyPort -NtResetEvent -NtResetWriteWatch -NtRestoreKey -NtResumeProcess -NtResumeThread -NtSaveKey -NtSaveKeyEx -NtSaveMergedKeys -NtSecureConnectPort -NtSetBootEntryOrder -NtSetBootOptions -NtSetContextThread -NtSetDebugFilterState -NtSetDefaultHardErrorPort -NtSetDefaultLocale -NtSetDefaultUILanguage -NtSetEaFile -NtSetEvent -NtSetEventBoostPriority -NtSetHighEventPair -NtSetHighWaitLowEventPair -NtSetInformationDebugObject -NtSetInformationFile -NtSetInformationJobObject -NtSetInformationKey -NtSetInformationObject -NtSetInformationProcess -NtSetInformationThread -NtSetInformationToken -NtSetIntervalProfile -NtSetIoCompletion -NtSetLdtEntries -NtSetLowEventPair -NtSetLowWaitHighEventPair -NtSetQuotaInformationFile -NtSetSecurityObject -NtSetSystemEnvironmentValue -NtSetSystemEnvironmentValueEx -NtSetSystemInformation -NtSetSystemPowerState -NtSetSystemTime -NtSetThreadExecutionState -NtSetTimer -NtSetTimerResolution -NtSetUuidSeed -NtSetValueKey -NtSetVolumeInformationFile -NtShutdownSystem -NtSignalAndWaitForSingleObject -NtStartProfile -NtStopProfile -NtSuspendProcess -NtSuspendThread -NtSystemDebugControl -NtTerminateJobObject -NtTerminateProcess -NtTerminateThread -NtTestAlert -NtTraceEvent -NtTranslateFilePath -NtUnloadDriver -NtUnloadKey -NtUnloadKeyEx -NtUnlockFile -NtUnlockVirtualMemory -NtUnmapViewOfSection -NtVdmControl -NtWaitForDebugEvent -NtWaitForKeyedEvent -NtWaitForMultipleObjects -NtWaitForSingleObject -NtWaitHighEventPair -NtWaitLowEventPair -NtWriteFile -NtWriteFileGather -NtWriteRequestData -NtWriteVirtualMemory -NtYieldExecution -PfxFindPrefix -PfxInitialize -PfxInsertPrefix -PfxRemovePrefix -RtlAbortRXact -RtlAbsoluteToSelfRelativeSD -RtlAcquirePebLock -RtlAcquireResourceExclusive -RtlAcquireResourceShared -RtlActivateActivationContext -RtlActivateActivationContextEx -RtlActivateActivationContextUnsafeFast -RtlAddAccessAllowedAce -RtlAddAccessAllowedAceEx -RtlAddAccessAllowedObjectAce -RtlAddAccessDeniedAce -RtlAddAccessDeniedAceEx -RtlAddAccessDeniedObjectAce -RtlAddAce -RtlAddActionToRXact -RtlAddAtomToAtomTable -RtlAddAttributeActionToRXact -RtlAddAuditAccessAce -RtlAddAuditAccessAceEx -RtlAddAuditAccessObjectAce -RtlAddCompoundAce -RtlAddRefActivationContext -RtlAddRefMemoryStream -RtlAddVectoredExceptionHandler -RtlAddressInSectionTable -RtlAdjustPrivilege -RtlAllocateAndInitializeSid -RtlAllocateHandle -RtlAllocateHeap -RtlAnsiCharToUnicodeChar -RtlAnsiStringToUnicodeSize -RtlAnsiStringToUnicodeString -RtlAppendAsciizToString -RtlAppendPathElement -RtlAppendStringToString -RtlAppendUnicodeStringToString -RtlAppendUnicodeToString -RtlApplicationVerifierStop -RtlApplyRXact -RtlApplyRXactNoFlush -RtlAreAllAccessesGranted -RtlAreAnyAccessesGranted -RtlAreBitsClear -RtlAreBitsSet -RtlAssert -RtlCancelTimer -RtlCaptureContext -RtlCaptureStackBackTrace -RtlCharToInteger -RtlCheckForOrphanedCriticalSections -RtlCheckRegistryKey -RtlClearAllBits -RtlClearBits -RtlCloneMemoryStream -RtlCommitMemoryStream -RtlCompactHeap -RtlCompareMemory -RtlCompareMemoryUlong -RtlCompareString -RtlCompareUnicodeString -RtlCompressBuffer -RtlComputeCrc32 -RtlComputeImportTableHash -RtlComputePrivatizedDllName_U -RtlConsoleMultiByteToUnicodeN -RtlConvertExclusiveToShared -RtlConvertSharedToExclusive -RtlConvertSidToUnicodeString -RtlConvertToAutoInheritSecurityObject -RtlCopyLuid -RtlCopyLuidAndAttributesArray -RtlCopyMemoryStreamTo -RtlCopyOutOfProcessMemoryStreamTo -RtlCopySecurityDescriptor -RtlCopySid -RtlCopySidAndAttributesArray -RtlCopyString -RtlCopyUnicodeString -RtlCreateAcl -RtlCreateActivationContext -RtlCreateAndSetSD -RtlCreateAtomTable -RtlCreateBootStatusDataFile -RtlCreateEnvironment -RtlCreateHeap -RtlCreateProcessParameters -RtlCreateQueryDebugBuffer -RtlCreateRegistryKey -RtlCreateSecurityDescriptor -RtlCreateServiceSid -RtlCreateSystemVolumeInformationFolder -RtlCreateTagHeap -RtlCreateTimer -RtlCreateTimerQueue -RtlCreateUnicodeString -RtlCreateUnicodeStringFromAsciiz -RtlCreateUserProcess -RtlCreateUserSecurityObject -RtlCreateUserThread -RtlCustomCPToUnicodeN -RtlCutoverTimeToSystemTime -RtlDeNormalizeProcessParams -RtlDeactivateActivationContext -RtlDeactivateActivationContextUnsafeFast -RtlDebugPrintTimes -RtlDecodePointer -RtlDecodeSystemPointer -RtlDecompressBuffer -RtlDecompressFragment -RtlDefaultNpAcl -RtlDelete -RtlDeleteAce -RtlDeleteAtomFromAtomTable -RtlDeleteCriticalSection -RtlDeleteElementGenericTable -RtlDeleteElementGenericTableAvl -RtlDeleteNoSplay -RtlDeleteRegistryValue -RtlDeleteResource -RtlDeleteSecurityObject -RtlDeleteTimer -RtlDeleteTimerQueue -RtlDeleteTimerQueueEx -RtlDeregisterWait -RtlDeregisterWaitEx -RtlDestroyAtomTable -RtlDestroyEnvironment -RtlDestroyHandleTable -RtlDestroyHeap -RtlDestroyProcessParameters -RtlDestroyQueryDebugBuffer -RtlDetermineDosPathNameType_U -RtlDllShutdownInProgress -RtlDnsHostNameToComputerName -RtlDoesFileExists_U -RtlDosApplyFileIsolationRedirection_Ustr -RtlDosPathNameToNtPathName_U -RtlDosSearchPath_U -RtlDosSearchPath_Ustr -RtlDowncaseUnicodeChar -RtlDowncaseUnicodeString -RtlDumpResource -RtlDuplicateUnicodeString -RtlEmptyAtomTable -RtlEnableEarlyCriticalSectionEventCreation -RtlEncodePointer -RtlEncodeSystemPointer -RtlEnterCriticalSection -RtlEnumProcessHeaps -RtlEnumerateGenericTable -RtlEnumerateGenericTableAvl -RtlEnumerateGenericTableLikeADirectory -RtlEnumerateGenericTableWithoutSplaying -RtlEnumerateGenericTableWithoutSplayingAvl -RtlEqualComputerName -RtlEqualDomainName -RtlEqualLuid -RtlEqualPrefixSid -RtlEqualSid -RtlEqualString -RtlEqualUnicodeString -RtlEraseUnicodeString -RtlExitUserThread -RtlExpandEnvironmentStrings_U -RtlFillMemory -RtlFinalReleaseOutOfProcessMemoryStream -RtlFindActivationContextSectionGuid -RtlFindActivationContextSectionString -RtlFindCharInUnicodeString -RtlFindClearBits -RtlFindClearBitsAndSet -RtlFindClearRuns -RtlFindLastBackwardRunClear -RtlFindLeastSignificantBit -RtlFindLongestRunClear -RtlFindMessage -RtlFindMostSignificantBit -RtlFindNextForwardRunClear -RtlFindSetBits -RtlFindSetBitsAndClear -RtlFirstEntrySList -RtlFirstFreeAce -RtlFlushSecureMemoryCache -RtlFormatCurrentUserKeyPath -RtlFormatMessage -RtlFreeAnsiString -RtlFreeHandle -RtlFreeHeap -RtlFreeOemString -RtlFreeSid -RtlFreeThreadActivationContextStack -RtlFreeUnicodeString -RtlGUIDFromString -RtlGenerate8dot3Name -RtlGetAce -RtlGetActiveActivationContext -RtlGetCallersAddress -RtlGetCompressionWorkSpaceSize -RtlGetControlSecurityDescriptor -RtlGetCurrentDirectory_U -RtlGetCurrentPeb -RtlGetDaclSecurityDescriptor -RtlGetElementGenericTable -RtlGetElementGenericTableAvl -RtlGetFrame -RtlGetFullPathName_U -RtlGetGroupSecurityDescriptor -RtlGetLastNtStatus -RtlGetLastWin32Error -RtlGetLengthWithoutLastFullDosOrNtPathElement -RtlGetLengthWithoutTrailingPathSeperators -RtlGetLongestNtPathLength -RtlGetNativeSystemInformation -RtlGetNtGlobalFlags -RtlGetNtProductType -RtlGetNtVersionNumbers -RtlGetOwnerSecurityDescriptor -RtlGetProcessHeaps -RtlGetSaclSecurityDescriptor -RtlGetSecurityDescriptorRMControl -RtlGetSetBootStatusData -RtlGetUnloadEventTrace -RtlGetUserInfoHeap -RtlGetVersion -RtlHashUnicodeString -RtlIdentifierAuthoritySid -RtlImageDirectoryEntryToData -RtlImageNtHeader -RtlImageRvaToSection -RtlImageRvaToVa -RtlImpersonateSelf -RtlInitAnsiString -RtlInitCodePageTable -RtlInitMemoryStream -RtlInitNlsTables -RtlInitOutOfProcessMemoryStream -RtlInitString -RtlInitUnicodeString -RtlInitUnicodeStringEx -RtlInitializeAtomPackage -RtlInitializeBitMap -RtlInitializeContext -RtlInitializeCriticalSection -RtlInitializeCriticalSectionAndSpinCount -RtlInitializeGenericTable -RtlInitializeGenericTableAvl -RtlInitializeHandleTable -RtlInitializeRXact -RtlInitializeResource -RtlInitializeSListHead -RtlInitializeSid -RtlInsertElementGenericTable -RtlInsertElementGenericTableAvl -RtlInt64ToUnicodeString -RtlIntegerToChar -RtlIntegerToUnicodeString -RtlInterlockedFlushSList -RtlInterlockedPopEntrySList -RtlInterlockedPushEntrySList -RtlInterlockedPushListSList -RtlIpv4AddressToStringA -RtlIpv4AddressToStringExA -RtlIpv4AddressToStringExW -RtlIpv4AddressToStringW -RtlIpv4StringToAddressA -RtlIpv4StringToAddressExA -RtlIpv4StringToAddressExW -RtlIpv4StringToAddressW -RtlIpv6AddressToStringA -RtlIpv6AddressToStringExA -RtlIpv6AddressToStringExW -RtlIpv6AddressToStringW -RtlIpv6StringToAddressA -RtlIpv6StringToAddressExA -RtlIpv6StringToAddressExW -RtlIpv6StringToAddressW -RtlIsActivationContextActive -RtlIsDosDeviceName_U -RtlIsGenericTableEmpty -RtlIsGenericTableEmptyAvl -RtlIsNameLegalDOS8Dot3 -RtlIsTextUnicode -RtlIsThreadWithinLoaderCallout -RtlIsValidHandle -RtlIsValidIndexHandle -RtlLargeIntegerToChar -RtlLeaveCriticalSection -RtlLengthRequiredSid -RtlLengthSecurityDescriptor -RtlLengthSid -RtlLocalTimeToSystemTime -RtlLockBootStatusData -RtlLockHeap -RtlLockMemoryStreamRegion -RtlLogStackBackTrace -RtlLookupAtomInAtomTable -RtlLookupElementGenericTable -RtlLookupElementGenericTableAvl -RtlMakeSelfRelativeSD -RtlMapGenericMask -RtlMapSecurityErrorToNtStatus -RtlMoveMemory -RtlMultiAppendUnicodeStringBuffer -RtlMultiByteToUnicodeN -RtlMultiByteToUnicodeSize -RtlNewInstanceSecurityObject -RtlNewSecurityGrantedAccess -RtlNewSecurityObject -RtlNewSecurityObjectEx -RtlNewSecurityObjectWithMultipleInheritance -RtlNormalizeProcessParams -RtlNtPathNameToDosPathName -RtlNtStatusToDosError -RtlNtStatusToDosErrorNoTeb -RtlNumberGenericTableElements -RtlNumberGenericTableElementsAvl -RtlNumberOfClearBits -RtlNumberOfSetBits -RtlOemStringToUnicodeSize -RtlOemStringToUnicodeString -RtlOemToUnicodeN -RtlOpenCurrentUser -RtlPcToFileHeader -RtlPinAtomInAtomTable -RtlPopFrame -RtlPrefixString -RtlPrefixUnicodeString -RtlProtectHeap -RtlPushFrame -RtlQueryAtomInAtomTable -RtlQueryDepthSList -RtlQueryEnvironmentVariable_U -RtlQueryHeapInformation -RtlQueryInformationAcl -RtlQueryInformationActivationContext -RtlQueryInformationActiveActivationContext -RtlQueryInterfaceMemoryStream -RtlQueryProcessBackTraceInformation -RtlQueryProcessDebugInformation -RtlQueryProcessHeapInformation -RtlQueryProcessLockInformation -RtlQueryRegistryValues -RtlQuerySecurityObject -RtlQueryTagHeap -RtlQueryTimeZoneInformation -RtlQueueApcWow64Thread -RtlQueueWorkItem -RtlRaiseException -RtlRaiseStatus -RtlRandom -RtlRandomEx -RtlReAllocateHeap -RtlReadMemoryStream -RtlReadOutOfProcessMemoryStream -RtlRealPredecessor -RtlRealSuccessor -RtlRegisterSecureMemoryCacheCallback -RtlRegisterWait -RtlReleaseActivationContext -RtlReleaseMemoryStream -RtlReleasePebLock -RtlReleaseResource -RtlRemoteCall -RtlRemoveVectoredExceptionHandler -RtlResetRtlTranslations -RtlRestoreLastWin32Error -RtlRevertMemoryStream -RtlRunDecodeUnicodeString -RtlRunEncodeUnicodeString -RtlSecondsSince1970ToTime -RtlSecondsSince1980ToTime -RtlSeekMemoryStream -RtlSelfRelativeToAbsoluteSD -RtlSelfRelativeToAbsoluteSD2 -RtlSetAllBits -RtlSetAttributesSecurityDescriptor -RtlSetBits -RtlSetControlSecurityDescriptor -RtlSetCriticalSectionSpinCount -RtlSetCurrentDirectory_U -RtlSetCurrentEnvironment -RtlSetDaclSecurityDescriptor -RtlSetEnvironmentVariable -RtlSetGroupSecurityDescriptor -RtlSetHeapInformation -RtlSetInformationAcl -RtlSetIoCompletionCallback -RtlSetLastWin32Error -RtlSetLastWin32ErrorAndNtStatusFromNtStatus -RtlSetMemoryStreamSize -RtlSetOwnerSecurityDescriptor -RtlSetProcessIsCritical -RtlSetSaclSecurityDescriptor -RtlSetSecurityDescriptorRMControl -RtlSetSecurityObject -RtlSetSecurityObjectEx -RtlSetThreadIsCritical -RtlSetThreadPoolStartFunc -RtlSetTimeZoneInformation -RtlSetTimer -RtlSetUserFlagsHeap -RtlSetUserValueHeap -RtlSizeHeap -RtlSplay -RtlStartRXact -RtlStatMemoryStream -RtlStringFromGUID -RtlSubAuthorityCountSid -RtlSubAuthoritySid -RtlSubtreePredecessor -RtlSubtreeSuccessor -RtlSystemTimeToLocalTime -RtlTimeFieldsToTime -RtlTimeToElapsedTimeFields -RtlTimeToSecondsSince1970 -RtlTimeToSecondsSince1980 -RtlTimeToTimeFields -RtlTraceDatabaseAdd -RtlTraceDatabaseCreate -RtlTraceDatabaseDestroy -RtlTraceDatabaseEnumerate -RtlTraceDatabaseFind -RtlTraceDatabaseLock -RtlTraceDatabaseUnlock -RtlTraceDatabaseValidate -RtlTryEnterCriticalSection -RtlUnhandledExceptionFilter -RtlUnhandledExceptionFilter2 -RtlUnicodeStringToAnsiSize -RtlUnicodeStringToAnsiString -RtlUnicodeStringToCountedOemString -RtlUnicodeStringToInteger -RtlUnicodeStringToOemSize -RtlUnicodeStringToOemString -RtlUnicodeToCustomCPN -RtlUnicodeToMultiByteN -RtlUnicodeToMultiByteSize -RtlUnicodeToOemN -RtlUniform -RtlUnlockBootStatusData -RtlUnlockHeap -RtlUnlockMemoryStreamRegion -RtlUnwind -RtlUpcaseUnicodeChar -RtlUpcaseUnicodeString -RtlUpcaseUnicodeStringToAnsiString -RtlUpcaseUnicodeStringToCountedOemString -RtlUpcaseUnicodeStringToOemString -RtlUpcaseUnicodeToCustomCPN -RtlUpcaseUnicodeToMultiByteN -RtlUpcaseUnicodeToOemN -RtlUpdateTimer -RtlUpperChar -RtlUpperString -RtlValidAcl -RtlValidRelativeSecurityDescriptor -RtlValidSecurityDescriptor -RtlValidSid -RtlValidateHeap -RtlValidateProcessHeaps -RtlValidateUnicodeString -RtlVerifyVersionInfo -RtlWalkFrameChain -RtlWalkHeap -RtlWriteMemoryStream -RtlWriteRegistryValue -RtlZeroHeap -RtlZeroMemory -RtlZombifyActivationContext -RtlpApplyLengthFunction -RtlpEnsureBufferSize -RtlpNotOwnerCriticalSection -RtlpNtCreateKey -RtlpNtEnumerateSubKey -RtlpNtMakeTemporaryKey -RtlpNtOpenKey -RtlpNtQueryValueKey -RtlpNtSetValueKey -RtlpUnWaitCriticalSection -RtlpWaitForCriticalSection -RtlxAnsiStringToUnicodeSize -RtlxOemStringToUnicodeSize -RtlxUnicodeStringToAnsiSize -RtlxUnicodeStringToOemSize -VerSetConditionMask -ZwAcceptConnectPort -ZwAccessCheck -ZwAccessCheckAndAuditAlarm -ZwAccessCheckByType -ZwAccessCheckByTypeAndAuditAlarm -ZwAccessCheckByTypeResultList -ZwAccessCheckByTypeResultListAndAuditAlarm -ZwAccessCheckByTypeResultListAndAuditAlarmByHandle -ZwAddAtom -ZwAddBootEntry -ZwAdjustGroupsToken -ZwAdjustPrivilegesToken -ZwAlertResumeThread -ZwAlertThread -ZwAllocateLocallyUniqueId -ZwAllocateUserPhysicalPages -ZwAllocateUuids -ZwAllocateVirtualMemory -ZwAreMappedFilesTheSame -ZwAssignProcessToJobObject -ZwCallbackReturn -ZwCancelIoFile -ZwCancelTimer -ZwClearEvent -ZwClose -ZwCloseObjectAuditAlarm -ZwCompactKeys -ZwCompareTokens -ZwCompleteConnectPort -ZwCompressKey -ZwConnectPort -ZwContinue -ZwCreateDebugObject -ZwCreateDirectoryObject -ZwCreateEvent -ZwCreateEventPair -ZwCreateFile -ZwCreateIoCompletion -ZwCreateJobObject -ZwCreateJobSet -ZwCreateKey -ZwCreateKeyedEvent -ZwCreateMailslotFile -ZwCreateMutant -ZwCreateNamedPipeFile -ZwCreatePagingFile -ZwCreatePort -ZwCreateProcess -ZwCreateProcessEx -ZwCreateProfile -ZwCreateSection -ZwCreateSemaphore -ZwCreateSymbolicLinkObject -ZwCreateThread -ZwCreateTimer -ZwCreateToken -ZwCreateWaitablePort -ZwDebugActiveProcess -ZwDebugContinue -ZwDelayExecution -ZwDeleteAtom -ZwDeleteBootEntry -ZwDeleteFile -ZwDeleteKey -ZwDeleteObjectAuditAlarm -ZwDeleteValueKey -ZwDeviceIoControlFile -ZwDisplayString -ZwDuplicateObject -ZwDuplicateToken -ZwEnumerateBootEntries -ZwEnumerateKey -ZwEnumerateSystemEnvironmentValuesEx -ZwEnumerateValueKey -ZwExtendSection -ZwFilterToken -ZwFindAtom -ZwFlushBuffersFile -ZwFlushInstructionCache -ZwFlushKey -ZwFlushVirtualMemory -ZwFlushWriteBuffer -ZwFreeUserPhysicalPages -ZwFreeVirtualMemory -ZwFsControlFile -ZwGetContextThread -ZwGetDevicePowerState -ZwGetWriteWatch -ZwImpersonateAnonymousToken -ZwImpersonateClientOfPort -ZwImpersonateThread -ZwInitializeRegistry -ZwInitiatePowerAction -ZwIsProcessInJob -ZwIsSystemResumeAutomatic -ZwListenPort -ZwLoadDriver -ZwLoadKey -ZwLoadKey2 -ZwLockFile -ZwLockProductActivationKeys -ZwLockRegistryKey -ZwLockVirtualMemory -ZwMakePermanentObject -ZwMakeTemporaryObject -ZwMapUserPhysicalPages -ZwMapUserPhysicalPagesScatter -ZwMapViewOfSection -ZwModifyBootEntry -ZwNotifyChangeDirectoryFile -ZwNotifyChangeKey -ZwNotifyChangeMultipleKeys -ZwOpenDirectoryObject -ZwOpenEvent -ZwOpenEventPair -ZwOpenFile -ZwOpenIoCompletion -ZwOpenJobObject -ZwOpenKey -ZwOpenKeyedEvent -ZwOpenMutant -ZwOpenObjectAuditAlarm -ZwOpenProcess -ZwOpenProcessToken -ZwOpenProcessTokenEx -ZwOpenSection -ZwOpenSemaphore -ZwOpenSymbolicLinkObject -ZwOpenThread -ZwOpenThreadToken -ZwOpenThreadTokenEx -ZwOpenTimer -ZwPlugPlayControl -ZwPowerInformation -ZwPrivilegeCheck -ZwPrivilegeObjectAuditAlarm -ZwPrivilegedServiceAuditAlarm -ZwProtectVirtualMemory -ZwPulseEvent -ZwQueryAttributesFile -ZwQueryBootEntryOrder -ZwQueryBootOptions -ZwQueryDebugFilterState -ZwQueryDefaultLocale -ZwQueryDefaultUILanguage -ZwQueryDirectoryFile -ZwQueryDirectoryObject -ZwQueryEaFile -ZwQueryEvent -ZwQueryFullAttributesFile -ZwQueryInformationAtom -ZwQueryInformationFile -ZwQueryInformationJobObject -ZwQueryInformationPort -ZwQueryInformationProcess -ZwQueryInformationThread -ZwQueryInformationToken -ZwQueryInstallUILanguage -ZwQueryIntervalProfile -ZwQueryIoCompletion -ZwQueryKey -ZwQueryMultipleValueKey -ZwQueryMutant -ZwQueryObject -ZwQueryOpenSubKeys -ZwQueryPerformanceCounter -ZwQueryPortInformationProcess -ZwQueryQuotaInformationFile -ZwQuerySection -ZwQuerySecurityObject -ZwQuerySemaphore -ZwQuerySymbolicLinkObject -ZwQuerySystemEnvironmentValue -ZwQuerySystemEnvironmentValueEx -ZwQuerySystemInformation -ZwQuerySystemTime -ZwQueryTimer -ZwQueryTimerResolution -ZwQueryValueKey -ZwQueryVirtualMemory -ZwQueryVolumeInformationFile -ZwQueueApcThread -ZwRaiseException -ZwRaiseHardError -ZwReadFile -ZwReadFileScatter -ZwReadRequestData -ZwReadVirtualMemory -ZwRegisterThreadTerminatePort -ZwReleaseKeyedEvent -ZwReleaseMutant -ZwReleaseSemaphore -ZwRemoveIoCompletion -ZwRemoveProcessDebug -ZwRenameKey -ZwReplaceKey -ZwReplyPort -ZwReplyWaitReceivePort -ZwReplyWaitReceivePortEx -ZwReplyWaitReplyPort -ZwRequestPort -ZwRequestWaitReplyPort -ZwResetEvent -ZwResetWriteWatch -ZwRestoreKey -ZwResumeProcess -ZwResumeThread -ZwSaveKey -ZwSaveKeyEx -ZwSaveMergedKeys -ZwSecureConnectPort -ZwSetBootEntryOrder -ZwSetBootOptions -ZwSetContextThread -ZwSetDebugFilterState -ZwSetDefaultHardErrorPort -ZwSetDefaultLocale -ZwSetDefaultUILanguage -ZwSetEaFile -ZwSetEvent -ZwSetEventBoostPriority -ZwSetHighEventPair -ZwSetHighWaitLowEventPair -ZwSetInformationDebugObject -ZwSetInformationFile -ZwSetInformationJobObject -ZwSetInformationKey -ZwSetInformationObject -ZwSetInformationProcess -ZwSetInformationThread -ZwSetInformationToken -ZwSetIntervalProfile -ZwSetIoCompletion -ZwSetLdtEntries -ZwSetLowEventPair -ZwSetLowWaitHighEventPair -ZwSetQuotaInformationFile -ZwSetSecurityObject -ZwSetSystemEnvironmentValue -ZwSetSystemEnvironmentValueEx -ZwSetSystemInformation -ZwSetSystemPowerState -ZwSetSystemTime -ZwSetThreadExecutionState -ZwSetTimer -ZwSetTimerResolution -ZwSetUuidSeed -ZwSetValueKey -ZwSetVolumeInformationFile -ZwShutdownSystem -ZwSignalAndWaitForSingleObject -ZwStartProfile -ZwStopProfile -ZwSuspendProcess -ZwSuspendThread -ZwSystemDebugControl -ZwTerminateJobObject -ZwTerminateProcess -ZwTerminateThread -ZwTestAlert -ZwTraceEvent -ZwTranslateFilePath -ZwUnloadDriver -ZwUnloadKey -ZwUnloadKeyEx -ZwUnlockFile -ZwUnlockVirtualMemory -ZwUnmapViewOfSection -ZwVdmControl -ZwWaitForDebugEvent -ZwWaitForKeyedEvent -ZwWaitForMultipleObjects -ZwWaitForSingleObject -ZwWaitHighEventPair -ZwWaitLowEventPair -ZwWriteFile -ZwWriteFileGather -ZwWriteRequestData -ZwWriteVirtualMemory -ZwYieldExecution -__isascii -__iscsym -__iscsymf -__toascii -_alldiv -_alldvrm -_allmul -_allrem -_allshl -_allshr -_atoi64 -_aulldiv -_aulldvrm -_aullrem -_aullshr -_fltused -_i64toa -_i64tow -_itoa -_itow -_lfind -_ltoa -_ltow -_memccpy -_memicmp -_snprintf -_snwprintf -_splitpath -_strcmpi -_stricmp -_strlwr -_strnicmp -_strupr -_ui64toa -_ui64tow -_ultoa -_ultow -_vsnprintf -_vsnwprintf -_wcsicmp -_wcslwr -_wcsnicmp -_wcsupr -_wtoi -_wtoi64 -_wtol -abs -atan -atoi -atol -bsearch -ceil -cos -fabs -floor -isalnum -isalpha -iscntrl -isdigit -isgraph -islower -isprint -ispunct -isspace -isupper -iswalpha -iswctype -iswdigit -iswlower -iswspace -iswxdigit -isxdigit -labs -log -mbstowcs -memchr -memcmp -memcpy -memmove -memset -pow -qsort -sin -sprintf -sqrt -sscanf -strcat -strchr -strcmp -strcpy -strcspn -strlen -strncat -strncmp -strncpy -strpbrk -strrchr -strspn -strstr -strtol -strtoul -swprintf -tan -tolower -toupper -towlower -towupper -vDbgPrintEx -vDbgPrintExWithPrefix -vsprintf -wcscat -wcschr -wcscmp -wcscpy -wcscspn -wcslen -wcsncat -wcsncmp -wcsncpy -wcspbrk -wcsrchr -wcsspn -wcsstr -wcstol -wcstombs -wcstoul diff --git a/libs/libmdbx/src/src/elements/options.h b/libs/libmdbx/src/src/elements/options.h deleted file mode 100644 index 2694e92011..0000000000 --- a/libs/libmdbx/src/src/elements/options.h +++ /dev/null @@ -1,211 +0,0 @@ -/******************************************************************************* - ******************************************************************************* - ******************************************************************************* - * - * - * #### ##### ##### # #### # # #### - * # # # # # # # # ## # # - * # # # # # # # # # # # #### - * # # ##### # # # # # # # # - * # # # # # # # # ## # # - * #### # # # #### # # #### - * - * - */ - -/* using fcntl(F_FULLFSYNC) with 5-10 times slowdown */ -#define MDBX_OSX_WANNA_DURABILITY 0 -/* using fsync() with chance of data lost on power failure */ -#define MDBX_OSX_WANNA_SPEED 1 - -#ifndef MDBX_OSX_SPEED_INSTEADOF_DURABILITY -#define MDBX_OSX_SPEED_INSTEADOF_DURABILITY MDBX_OSX_WANNA_DURABILITY -#endif /* MDBX_OSX_SPEED_INSTEADOF_DURABILITY */ - -/* Controls checking PID against reuse DB environment after the fork() */ -#ifndef MDBX_TXN_CHECKPID -#if defined(MADV_DONTFORK) || defined(_WIN32) || defined(_WIN64) -/* PID check could be ommited: - * - on Linux when madvise(MADV_DONTFORK) is available. i.e. after the fork() - * mapped pages will not be available for child process. - * - in Windows where fork() not available. */ -#define MDBX_TXN_CHECKPID 0 -#else -#define MDBX_TXN_CHECKPID 1 -#endif -#define MDBX_TXN_CHECKPID_CONFIG "AUTO=" STRINGIFY(MDBX_TXN_CHECKPID) -#else -#define MDBX_TXN_CHECKPID_CONFIG STRINGIFY(MDBX_TXN_CHECKPID) -#endif /* MDBX_TXN_CHECKPID */ - -/* Controls checking transaction owner thread against misuse transactions from - * other threads. */ -#ifndef MDBX_TXN_CHECKOWNER -#define MDBX_TXN_CHECKOWNER 1 -#define MDBX_TXN_CHECKOWNER_CONFIG "AUTO=" STRINGIFY(MDBX_TXN_CHECKOWNER) -#else -#define MDBX_TXN_CHECKOWNER_CONFIG STRINGIFY(MDBX_TXN_CHECKOWNER) -#endif /* MDBX_TXN_CHECKOWNER */ - -/* Does a system have battery-backed Real-Time Clock or just a fake. */ -#ifndef MDBX_TRUST_RTC -#if defined(__linux__) || defined(__gnu_linux__) || defined(__NetBSD__) || \ - defined(__OpenBSD__) -#define MDBX_TRUST_RTC 0 /* a lot of embedded systems have a fake RTC */ -#else -#define MDBX_TRUST_RTC 1 -#endif -#define MDBX_TRUST_RTC_CONFIG "AUTO=" STRINGIFY(MDBX_TRUST_RTC) -#else -#define MDBX_TRUST_RTC_CONFIG STRINGIFY(MDBX_TRUST_RTC) -#endif /* MDBX_TRUST_RTC */ - -//------------------------------------------------------------------------------ - -#define MDBX_LOCKING_WIN32FILES -1 /* Win32 File Locking API */ -#define MDBX_LOCKING_SYSV 5 /* SystemV IPC semaphores */ -#define MDBX_LOCKING_POSIX1988 1988 /* POSIX-1 Shared anonymous semaphores */ -#define MDBX_LOCKING_POSIX2001 2001 /* POSIX-2001 Shared Mutexes */ -#define MDBX_LOCKING_POSIX2008 2008 /* POSIX-2008 Robust Mutexes */ -#define MDBX_LOCKING_BENAPHORE 1995 /* BeOS Benaphores, aka Futexes */ - -#if defined(_WIN32) || defined(_WIN64) -#define MDBX_LOCKING MDBX_LOCKING_WIN32FILES -#else -#ifndef MDBX_LOCKING -#if defined(_POSIX_THREAD_PROCESS_SHARED) && \ - _POSIX_THREAD_PROCESS_SHARED >= 200112L && !defined(__FreeBSD__) - -/* Some platforms define the EOWNERDEAD error code even though they - * don't support Robust Mutexes. If doubt compile with -MDBX_LOCKING=2001. */ -#if defined(EOWNERDEAD) && _POSIX_THREAD_PROCESS_SHARED >= 200809L && \ - (defined(_POSIX_THREAD_ROBUST_PRIO_INHERIT) || \ - defined(_POSIX_THREAD_ROBUST_PRIO_PROTECT) || \ - defined(PTHREAD_MUTEX_ROBUST) || defined(PTHREAD_MUTEX_ROBUST_NP)) && \ - (!defined(__GLIBC__) || \ - __GLIBC_PREREQ(2, 10) /* troubles with Robust mutexes before 2.10 */) -#define MDBX_LOCKING MDBX_LOCKING_POSIX2008 -#else -#define MDBX_LOCKING MDBX_LOCKING_POSIX2001 -#endif -#elif defined(__sun) || defined(__SVR4) || defined(__svr4__) -#define MDBX_LOCKING MDBX_LOCKING_POSIX1988 -#else -#define MDBX_LOCKING MDBX_LOCKING_SYSV -#endif -#define MDBX_LOCKING_CONFIG "AUTO=" STRINGIFY(MDBX_LOCKING) -#else -#define MDBX_LOCKING_CONFIG STRINGIFY(MDBX_LOCKING) -#endif /* MDBX_LOCKING */ -#endif /* !Windows */ - -#ifndef MDBX_USE_OFDLOCKS -#if defined(F_OFD_SETLK) && defined(F_OFD_SETLKW) && defined(F_OFD_GETLK) && \ - !defined(MDBX_SAFE4QEMU) && \ - !defined(__sun) /* OFD-lock are broken on Solaris */ -#define MDBX_USE_OFDLOCKS 1 -#else -#define MDBX_USE_OFDLOCKS 0 -#endif -#define MDBX_USE_OFDLOCKS_CONFIG "AUTO=" STRINGIFY(MDBX_USE_OFDLOCKS) -#else -#define MDBX_USE_OFDLOCKS_CONFIG STRINGIFY(MDBX_USE_OFDLOCKS) -#endif /* MDBX_USE_OFDLOCKS */ - -//------------------------------------------------------------------------------ - -#ifndef MDBX_CPU_WRITEBACK_INCOHERENT -#if defined(__ia32__) || defined(__e2k__) || defined(__hppa) || \ - defined(__hppa__) -#define MDBX_CPU_WRITEBACK_INCOHERENT 0 -#else -#define MDBX_CPU_WRITEBACK_INCOHERENT 1 -#endif -#endif /* MDBX_CPU_WRITEBACK_INCOHERENT */ - -#ifndef MDBX_MMAP_INCOHERENT_FILE_WRITE -#ifdef __OpenBSD__ -#define MDBX_MMAP_INCOHERENT_FILE_WRITE 1 -#else -#define MDBX_MMAP_INCOHERENT_FILE_WRITE 0 -#endif -#endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ - -#ifndef MDBX_MMAP_INCOHERENT_CPU_CACHE -#if defined(__mips) || defined(__mips__) || defined(__mips64) || \ - defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ - defined(__MWERKS__) || defined(__sgi) -/* MIPS has cache coherency issues. */ -#define MDBX_MMAP_INCOHERENT_CPU_CACHE 1 -#else -/* LY: assume no relevant mmap/dcache issues. */ -#define MDBX_MMAP_INCOHERENT_CPU_CACHE 0 -#endif -#endif /* MDBX_MMAP_INCOHERENT_CPU_CACHE */ - -#ifndef MDBX_64BIT_ATOMIC -#if MDBX_WORDBITS >= 64 -#define MDBX_64BIT_ATOMIC 1 -#else -#define MDBX_64BIT_ATOMIC 0 -#endif -#define MDBX_64BIT_ATOMIC_CONFIG "AUTO=" STRINGIFY(MDBX_64BIT_ATOMIC) -#else -#define MDBX_64BIT_ATOMIC_CONFIG STRINGIFY(MDBX_64BIT_ATOMIC) -#endif /* MDBX_64BIT_ATOMIC */ - -#ifndef MDBX_64BIT_CAS -#if defined(ATOMIC_LLONG_LOCK_FREE) -#if ATOMIC_LLONG_LOCK_FREE > 1 -#define MDBX_64BIT_CAS 1 -#else -#define MDBX_64BIT_CAS 0 -#endif -#elif defined(__GCC_ATOMIC_LLONG_LOCK_FREE) -#if __GCC_ATOMIC_LLONG_LOCK_FREE > 1 -#define MDBX_64BIT_CAS 1 -#else -#define MDBX_64BIT_CAS 0 -#endif -#elif defined(__CLANG_ATOMIC_LLONG_LOCK_FREE) -#if __CLANG_ATOMIC_LLONG_LOCK_FREE > 1 -#define MDBX_64BIT_CAS 1 -#else -#define MDBX_64BIT_CAS 0 -#endif -#elif defined(_MSC_VER) || defined(__APPLE__) -#define MDBX_64BIT_CAS 1 -#else -#define MDBX_64BIT_CAS MDBX_64BIT_ATOMIC -#endif -#define MDBX_64BIT_CAS_CONFIG "AUTO=" STRINGIFY(MDBX_64BIT_CAS) -#else -#define MDBX_64BIT_CAS_CONFIG STRINGIFY(MDBX_64BIT_CAS) -#endif /* MDBX_64BIT_CAS */ - -#if !defined(MDBX_UNALIGNED_OK) -#if defined(_MSC_VER) -#define MDBX_UNALIGNED_OK 1 /* avoid MSVC misoptimization */ -#elif __CLANG_PREREQ(5, 0) || __GNUC_PREREQ(5, 0) -#define MDBX_UNALIGNED_OK 0 /* expecting optimization is well done */ -#elif (defined(__ia32__) || defined(__ARM_FEATURE_UNALIGNED)) && \ - !defined(__ALIGNED__) -#define MDBX_UNALIGNED_OK 1 -#else -#define MDBX_UNALIGNED_OK 0 -#endif -#endif /* MDBX_UNALIGNED_OK */ - -#ifndef MDBX_CACHELINE_SIZE -#if defined(SYSTEM_CACHE_ALIGNMENT_SIZE) -#define MDBX_CACHELINE_SIZE SYSTEM_CACHE_ALIGNMENT_SIZE -#elif defined(__ia64__) || defined(__ia64) || defined(_M_IA64) -#define MDBX_CACHELINE_SIZE 128 -#else -#define MDBX_CACHELINE_SIZE 64 -#endif -#endif /* MDBX_CACHELINE_SIZE */ - -/******************************************************************************* - ******************************************************************************* - ******************************************************************************/ diff --git a/libs/libmdbx/src/src/elements/osal.c b/libs/libmdbx/src/src/elements/osal.c deleted file mode 100644 index 06a448cdbc..0000000000 --- a/libs/libmdbx/src/src/elements/osal.c +++ /dev/null @@ -1,2187 +0,0 @@ -/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#include "internals.h" - -#if defined(_WIN32) || defined(_WIN64) - -#include - -static int waitstatus2errcode(DWORD result) { - switch (result) { - case WAIT_OBJECT_0: - return MDBX_SUCCESS; - case WAIT_FAILED: - return GetLastError(); - case WAIT_ABANDONED: - return ERROR_ABANDONED_WAIT_0; - case WAIT_IO_COMPLETION: - return ERROR_USER_APC; - case WAIT_TIMEOUT: - return ERROR_TIMEOUT; - default: - return ERROR_UNHANDLED_ERROR; - } -} - -/* Map a result from an NTAPI call to WIN32 error code. */ -static int ntstatus2errcode(NTSTATUS status) { - DWORD dummy; - OVERLAPPED ov; - memset(&ov, 0, sizeof(ov)); - ov.Internal = status; - return GetOverlappedResult(NULL, &ov, &dummy, FALSE) ? MDBX_SUCCESS - : GetLastError(); -} - -/* We use native NT APIs to setup the memory map, so that we can - * let the DB file grow incrementally instead of always preallocating - * the full size. These APIs are defined in and - * but those headers are meant for driver-level development and - * conflict with the regular user-level headers, so we explicitly - * declare them here. Using these APIs also means we must link to - * ntdll.dll, which is not linked by default in user code. */ - -extern NTSTATUS NTAPI NtCreateSection( - OUT PHANDLE SectionHandle, IN ACCESS_MASK DesiredAccess, - IN OPTIONAL POBJECT_ATTRIBUTES ObjectAttributes, - IN OPTIONAL PLARGE_INTEGER MaximumSize, IN ULONG SectionPageProtection, - IN ULONG AllocationAttributes, IN OPTIONAL HANDLE FileHandle); - -typedef struct _SECTION_BASIC_INFORMATION { - ULONG Unknown; - ULONG SectionAttributes; - LARGE_INTEGER SectionSize; -} SECTION_BASIC_INFORMATION, *PSECTION_BASIC_INFORMATION; - -extern NTSTATUS NTAPI NtMapViewOfSection( - IN HANDLE SectionHandle, IN HANDLE ProcessHandle, IN OUT PVOID *BaseAddress, - IN ULONG_PTR ZeroBits, IN SIZE_T CommitSize, - IN OUT OPTIONAL PLARGE_INTEGER SectionOffset, IN OUT PSIZE_T ViewSize, - IN SECTION_INHERIT InheritDisposition, IN ULONG AllocationType, - IN ULONG Win32Protect); - -extern NTSTATUS NTAPI NtUnmapViewOfSection(IN HANDLE ProcessHandle, - IN OPTIONAL PVOID BaseAddress); - -extern NTSTATUS NTAPI NtClose(HANDLE Handle); - -extern NTSTATUS NTAPI NtAllocateVirtualMemory( - IN HANDLE ProcessHandle, IN OUT PVOID *BaseAddress, IN ULONG_PTR ZeroBits, - IN OUT PSIZE_T RegionSize, IN ULONG AllocationType, IN ULONG Protect); - -extern NTSTATUS NTAPI NtFreeVirtualMemory(IN HANDLE ProcessHandle, - IN PVOID *BaseAddress, - IN OUT PSIZE_T RegionSize, - IN ULONG FreeType); - -#ifndef WOF_CURRENT_VERSION -typedef struct _WOF_EXTERNAL_INFO { - DWORD Version; - DWORD Provider; -} WOF_EXTERNAL_INFO, *PWOF_EXTERNAL_INFO; -#endif /* WOF_CURRENT_VERSION */ - -#ifndef WIM_PROVIDER_CURRENT_VERSION -#define WIM_PROVIDER_HASH_SIZE 20 - -typedef struct _WIM_PROVIDER_EXTERNAL_INFO { - DWORD Version; - DWORD Flags; - LARGE_INTEGER DataSourceId; - BYTE ResourceHash[WIM_PROVIDER_HASH_SIZE]; -} WIM_PROVIDER_EXTERNAL_INFO, *PWIM_PROVIDER_EXTERNAL_INFO; -#endif /* WIM_PROVIDER_CURRENT_VERSION */ - -#ifndef FILE_PROVIDER_CURRENT_VERSION -typedef struct _FILE_PROVIDER_EXTERNAL_INFO_V1 { - ULONG Version; - ULONG Algorithm; - ULONG Flags; -} FILE_PROVIDER_EXTERNAL_INFO_V1, *PFILE_PROVIDER_EXTERNAL_INFO_V1; -#endif /* FILE_PROVIDER_CURRENT_VERSION */ - -#ifndef STATUS_OBJECT_NOT_EXTERNALLY_BACKED -#define STATUS_OBJECT_NOT_EXTERNALLY_BACKED ((NTSTATUS)0xC000046DL) -#endif -#ifndef STATUS_INVALID_DEVICE_REQUEST -#define STATUS_INVALID_DEVICE_REQUEST ((NTSTATUS)0xC0000010L) -#endif - -#ifndef FILE_DEVICE_FILE_SYSTEM -#define FILE_DEVICE_FILE_SYSTEM 0x00000009 -#endif - -#ifndef FSCTL_GET_EXTERNAL_BACKING -#define FSCTL_GET_EXTERNAL_BACKING \ - CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 196, METHOD_BUFFERED, FILE_ANY_ACCESS) -#endif - -#endif /* _WIN32 || _WIN64 */ - -/*----------------------------------------------------------------------------*/ - -#if _POSIX_C_SOURCE > 200212 && \ - /* workaround for avoid musl libc wrong prototype */ ( \ - defined(__GLIBC__) || defined(__GNU_LIBRARY__)) -/* Prototype should match libc runtime. ISO POSIX (2003) & LSB 1.x-3.x */ -__extern_C void __assert_fail(const char *assertion, const char *file, - unsigned line, const char *function) -#ifdef __THROW - __THROW -#else - __nothrow -#endif /* __THROW */ - __noreturn; - -#elif defined(__APPLE__) || defined(__MACH__) -__extern_C void __assert_rtn(const char *function, const char *file, int line, - const char *assertion) /* __nothrow */ -#ifdef __dead2 - __dead2 -#else - __noreturn -#endif /* __dead2 */ -#ifdef __disable_tail_calls - __disable_tail_calls -#endif /* __disable_tail_calls */ - ; - -#define __assert_fail(assertion, file, line, function) \ - __assert_rtn(function, file, line, assertion) -#elif defined(__sun) || defined(__SVR4) || defined(__svr4__) -__extern_C void __assert_c99(const char *assection, const char *file, int line, - const char *function) __noreturn; -#define __assert_fail(assertion, file, line, function) \ - __assert_c99(assertion, file, line, function) -#elif defined(__OpenBSD__) -__extern_C __dead void __assert2(const char *file, int line, - const char *function, - const char *assertion) /* __nothrow */; -#define __assert_fail(assertion, file, line, function) \ - __assert2(file, line, function, assertion) -#elif defined(__NetBSD__) -__extern_C __dead void __assert13(const char *file, int line, - const char *function, - const char *assertion) /* __nothrow */; -#define __assert_fail(assertion, file, line, function) \ - __assert13(file, line, function, assertion) -#elif defined(__FreeBSD__) || defined(__BSD__) || defined(__bsdi__) || \ - defined(__DragonFly__) -__extern_C void __assert(const char *function, const char *file, int line, - const char *assertion) /* __nothrow */ -#ifdef __dead2 - __dead2 -#else - __noreturn -#endif /* __dead2 */ -#ifdef __disable_tail_calls - __disable_tail_calls -#endif /* __disable_tail_calls */ - ; -#define __assert_fail(assertion, file, line, function) \ - __assert(function, file, line, assertion) - -#endif /* __assert_fail */ - -MDBX_INTERNAL_FUNC void __cold mdbx_assert_fail(const MDBX_env *env, - const char *msg, - const char *func, int line) { -#if MDBX_DEBUG - if (env && env->me_assert_func) { - env->me_assert_func(env, msg, func, line); - return; - } -#else - (void)env; -#endif /* MDBX_DEBUG */ - - if (mdbx_debug_logger) - mdbx_debug_log(MDBX_LOG_FATAL, func, line, "assert: %s\n", msg); - else { -#if defined(_WIN32) || defined(_WIN64) - char *message = nullptr; - const int num = mdbx_asprintf(&message, "\r\nMDBX-ASSERTION: %s, %s:%u", - msg, func ? func : "unknown", line); - if (num < 1 || !message) - message = ""; - OutputDebugStringA(message); - if (IsDebuggerPresent()) - DebugBreak(); -#else - __assert_fail(msg, "mdbx", line, func); -#endif - } - -#if defined(_WIN32) || defined(_WIN64) - FatalExit(ERROR_UNHANDLED_ERROR); -#else - abort(); -#endif -} - -MDBX_INTERNAL_FUNC __cold void mdbx_panic(const char *fmt, ...) { - va_list ap; - va_start(ap, fmt); - - char *message = nullptr; - const int num = mdbx_vasprintf(&message, fmt, ap); - va_end(ap); - const char *const const_message = - (num < 1 || !message) ? "" - : message; - -#if defined(_WIN32) || defined(_WIN64) - OutputDebugStringA("\r\nMDBX-PANIC: "); - OutputDebugStringA(const_message); - if (IsDebuggerPresent()) - DebugBreak(); - FatalExit(ERROR_UNHANDLED_ERROR); -#else - __assert_fail(const_message, "mdbx", 0, "panic"); - abort(); -#endif -} - -/*----------------------------------------------------------------------------*/ - -#ifndef mdbx_vasprintf -MDBX_INTERNAL_FUNC int mdbx_vasprintf(char **strp, const char *fmt, - va_list ap) { - va_list ones; - va_copy(ones, ap); - int needed = vsnprintf(nullptr, 0, fmt, ap); - - if (unlikely(needed < 0 || needed >= INT_MAX)) { - *strp = nullptr; - va_end(ones); - return needed; - } - - *strp = mdbx_malloc(needed + 1); - if (unlikely(*strp == nullptr)) { - va_end(ones); -#if defined(_WIN32) || defined(_WIN64) - SetLastError(MDBX_ENOMEM); -#else - errno = MDBX_ENOMEM; -#endif - return -1; - } - - int actual = vsnprintf(*strp, needed + 1, fmt, ones); - va_end(ones); - - assert(actual == needed); - if (unlikely(actual < 0)) { - mdbx_free(*strp); - *strp = nullptr; - } - return actual; -} -#endif /* mdbx_vasprintf */ - -#ifndef mdbx_asprintf -MDBX_INTERNAL_FUNC int mdbx_asprintf(char **strp, const char *fmt, ...) { - va_list ap; - va_start(ap, fmt); - int rc = mdbx_vasprintf(strp, fmt, ap); - va_end(ap); - return rc; -} -#endif /* mdbx_asprintf */ - -#ifndef mdbx_memalign_alloc -MDBX_INTERNAL_FUNC int mdbx_memalign_alloc(size_t alignment, size_t bytes, - void **result) { - assert(is_powerof2(alignment) && alignment >= sizeof(void *)); -#if defined(_WIN32) || defined(_WIN64) - (void)alignment; - *result = VirtualAlloc(NULL, bytes, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); - return *result ? MDBX_SUCCESS : MDBX_ENOMEM /* ERROR_OUTOFMEMORY */; -#elif defined(_ISOC11_SOURCE) - *result = aligned_alloc(alignment, roundup_powerof2(bytes, alignment)); - return *result ? MDBX_SUCCESS : errno; -#elif _POSIX_VERSION >= 200112L - *result = nullptr; - return posix_memalign(result, alignment, bytes); -#elif __GLIBC_PREREQ(2, 16) || __STDC_VERSION__ >= 201112L - *result = memalign(alignment, bytes); - return *result ? MDBX_SUCCESS : errno; -#else -#error FIXME -#endif -} -#endif /* mdbx_memalign_alloc */ - -#ifndef mdbx_memalign_free -MDBX_INTERNAL_FUNC void mdbx_memalign_free(void *ptr) { -#if defined(_WIN32) || defined(_WIN64) - VirtualFree(ptr, 0, MEM_RELEASE); -#else - mdbx_free(ptr); -#endif -} -#endif /* mdbx_memalign_free */ - -#ifndef mdbx_strdup -char *mdbx_strdup(const char *str) { - if (!str) - return NULL; - size_t bytes = strlen(str) + 1; - char *dup = mdbx_malloc(bytes); - if (dup) - memcpy(dup, str, bytes); - return dup; -} -#endif /* mdbx_strdup */ - -/*----------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC int mdbx_condmutex_init(mdbx_condmutex_t *condmutex) { -#if defined(_WIN32) || defined(_WIN64) - int rc = MDBX_SUCCESS; - condmutex->event = NULL; - condmutex->mutex = CreateMutexW(NULL, FALSE, NULL); - if (!condmutex->mutex) - return GetLastError(); - - condmutex->event = CreateEventW(NULL, TRUE, FALSE, NULL); - if (!condmutex->event) { - rc = GetLastError(); - (void)CloseHandle(condmutex->mutex); - condmutex->mutex = NULL; - } - return rc; -#else - memset(condmutex, 0, sizeof(mdbx_condmutex_t)); - int rc = pthread_mutex_init(&condmutex->mutex, NULL); - if (rc == 0) { - rc = pthread_cond_init(&condmutex->cond, NULL); - if (rc != 0) - (void)pthread_mutex_destroy(&condmutex->mutex); - } - return rc; -#endif -} - -static bool is_allzeros(const void *ptr, size_t bytes) { - const uint8_t *u8 = ptr; - for (size_t i = 0; i < bytes; ++i) - if (u8[i] != 0) - return false; - return true; -} - -MDBX_INTERNAL_FUNC int mdbx_condmutex_destroy(mdbx_condmutex_t *condmutex) { - int rc = MDBX_EINVAL; -#if defined(_WIN32) || defined(_WIN64) - if (condmutex->event) { - rc = CloseHandle(condmutex->event) ? MDBX_SUCCESS : GetLastError(); - if (rc == MDBX_SUCCESS) - condmutex->event = NULL; - } - if (condmutex->mutex) { - rc = CloseHandle(condmutex->mutex) ? MDBX_SUCCESS : GetLastError(); - if (rc == MDBX_SUCCESS) - condmutex->mutex = NULL; - } -#else - if (!is_allzeros(&condmutex->cond, sizeof(condmutex->cond))) { - rc = pthread_cond_destroy(&condmutex->cond); - if (rc == 0) - memset(&condmutex->cond, 0, sizeof(condmutex->cond)); - } - if (!is_allzeros(&condmutex->mutex, sizeof(condmutex->mutex))) { - rc = pthread_mutex_destroy(&condmutex->mutex); - if (rc == 0) - memset(&condmutex->mutex, 0, sizeof(condmutex->mutex)); - } -#endif - return rc; -} - -MDBX_INTERNAL_FUNC int mdbx_condmutex_lock(mdbx_condmutex_t *condmutex) { -#if defined(_WIN32) || defined(_WIN64) - DWORD code = WaitForSingleObject(condmutex->mutex, INFINITE); - return waitstatus2errcode(code); -#else - return pthread_mutex_lock(&condmutex->mutex); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_condmutex_unlock(mdbx_condmutex_t *condmutex) { -#if defined(_WIN32) || defined(_WIN64) - return ReleaseMutex(condmutex->mutex) ? MDBX_SUCCESS : GetLastError(); -#else - return pthread_mutex_unlock(&condmutex->mutex); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_condmutex_signal(mdbx_condmutex_t *condmutex) { -#if defined(_WIN32) || defined(_WIN64) - return SetEvent(condmutex->event) ? MDBX_SUCCESS : GetLastError(); -#else - return pthread_cond_signal(&condmutex->cond); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_condmutex_wait(mdbx_condmutex_t *condmutex) { -#if defined(_WIN32) || defined(_WIN64) - DWORD code = - SignalObjectAndWait(condmutex->mutex, condmutex->event, INFINITE, FALSE); - if (code == WAIT_OBJECT_0) { - code = WaitForSingleObject(condmutex->mutex, INFINITE); - if (code == WAIT_OBJECT_0) - return ResetEvent(condmutex->event) ? MDBX_SUCCESS : GetLastError(); - } - return waitstatus2errcode(code); -#else - return pthread_cond_wait(&condmutex->cond, &condmutex->mutex); -#endif -} - -/*----------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC int mdbx_fastmutex_init(mdbx_fastmutex_t *fastmutex) { -#if defined(_WIN32) || defined(_WIN64) - InitializeCriticalSection(fastmutex); - return MDBX_SUCCESS; -#else - return pthread_mutex_init(fastmutex, NULL); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex) { -#if defined(_WIN32) || defined(_WIN64) - DeleteCriticalSection(fastmutex); - return MDBX_SUCCESS; -#else - return pthread_mutex_destroy(fastmutex); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex) { -#if defined(_WIN32) || defined(_WIN64) - EnterCriticalSection(fastmutex); - return MDBX_SUCCESS; -#else - return pthread_mutex_lock(fastmutex); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_fastmutex_release(mdbx_fastmutex_t *fastmutex) { -#if defined(_WIN32) || defined(_WIN64) - LeaveCriticalSection(fastmutex); - return MDBX_SUCCESS; -#else - return pthread_mutex_unlock(fastmutex); -#endif -} - -/*----------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC int mdbx_removefile(const char *pathname) { -#if defined(_WIN32) || defined(_WIN64) - const size_t wlen = mbstowcs(nullptr, pathname, INT_MAX); - if (wlen < 1 || wlen > /* MAX_PATH */ INT16_MAX) - return ERROR_INVALID_NAME; - wchar_t *const pathnameW = _alloca((wlen + 1) * sizeof(wchar_t)); - if (wlen != mbstowcs(pathnameW, pathname, wlen + 1)) - return ERROR_INVALID_NAME; - return DeleteFileW(pathnameW) ? MDBX_SUCCESS : GetLastError(); -#else - return unlink(pathname) ? errno : MDBX_SUCCESS; -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose, - const MDBX_env *env, const char *pathname, - mdbx_filehandle_t *fd, - mode_t unix_mode_bits) { - *fd = INVALID_HANDLE_VALUE; - -#if defined(_WIN32) || defined(_WIN64) - const size_t wlen = mbstowcs(nullptr, pathname, INT_MAX); - if (wlen < 1 || wlen > /* MAX_PATH */ INT16_MAX) - return ERROR_INVALID_NAME; - wchar_t *const pathnameW = _alloca((wlen + 1) * sizeof(wchar_t)); - if (wlen != mbstowcs(pathnameW, pathname, wlen + 1)) - return ERROR_INVALID_NAME; - - DWORD CreationDisposition = unix_mode_bits ? OPEN_ALWAYS : OPEN_EXISTING; - DWORD FlagsAndAttributes = - FILE_FLAG_POSIX_SEMANTICS | FILE_ATTRIBUTE_NOT_CONTENT_INDEXED; - DWORD DesiredAccess = FILE_READ_ATTRIBUTES; - DWORD ShareMode = (env->me_flags & MDBX_EXCLUSIVE) - ? 0 - : (FILE_SHARE_READ | FILE_SHARE_WRITE); - - switch (purpose) { - default: - return ERROR_INVALID_PARAMETER; - case MDBX_OPEN_LCK: - CreationDisposition = OPEN_ALWAYS; - DesiredAccess |= GENERIC_READ | GENERIC_WRITE; - FlagsAndAttributes |= FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_TEMPORARY; - break; - case MDBX_OPEN_DXB_READ: - CreationDisposition = OPEN_EXISTING; - DesiredAccess |= GENERIC_READ; - ShareMode |= FILE_SHARE_READ; - break; - case MDBX_OPEN_DXB_LAZY: - DesiredAccess |= GENERIC_READ | GENERIC_WRITE; - break; - case MDBX_OPEN_DXB_DSYNC: - CreationDisposition = OPEN_EXISTING; - DesiredAccess |= GENERIC_WRITE; - FlagsAndAttributes |= FILE_FLAG_WRITE_THROUGH; - break; - case MDBX_OPEN_COPY: - CreationDisposition = CREATE_NEW; - ShareMode = 0; - DesiredAccess |= GENERIC_WRITE; - FlagsAndAttributes |= - (env->me_psize < env->me_os_psize) ? 0 : FILE_FLAG_NO_BUFFERING; - break; - } - - *fd = CreateFileW(pathnameW, DesiredAccess, ShareMode, NULL, - CreationDisposition, FlagsAndAttributes, NULL); - if (*fd == INVALID_HANDLE_VALUE) - return GetLastError(); - - BY_HANDLE_FILE_INFORMATION info; - if (!GetFileInformationByHandle(*fd, &info)) { - int err = GetLastError(); - CloseHandle(*fd); - *fd = INVALID_HANDLE_VALUE; - return err; - } - const DWORD AttributesDiff = - (info.dwFileAttributes ^ FlagsAndAttributes) & - (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_NOT_CONTENT_INDEXED | - FILE_ATTRIBUTE_TEMPORARY | FILE_ATTRIBUTE_COMPRESSED); - if (AttributesDiff) - (void)SetFileAttributesW(pathnameW, info.dwFileAttributes ^ AttributesDiff); - -#else - int flags = unix_mode_bits ? O_CREAT : 0; - switch (purpose) { - default: - return EINVAL; - case MDBX_OPEN_LCK: - flags |= O_RDWR; - break; - case MDBX_OPEN_DXB_READ: - flags = O_RDONLY; - break; - case MDBX_OPEN_DXB_LAZY: - flags |= O_RDWR; - break; - case MDBX_OPEN_COPY: - flags = O_CREAT | O_WRONLY | O_EXCL; - break; - case MDBX_OPEN_DXB_DSYNC: - flags |= O_WRONLY; -#if defined(O_DSYNC) - flags |= O_DSYNC; -#elif defined(O_SYNC) - flags |= O_SYNC; -#elif defined(O_FSYNC) - flags |= O_FSYNC; -#endif - break; - } - - const bool direct_nocache_for_copy = - env->me_psize >= env->me_os_psize && purpose == MDBX_OPEN_COPY; - if (direct_nocache_for_copy) { -#if defined(O_DIRECT) - flags |= O_DIRECT; -#endif /* O_DIRECT */ -#if defined(O_NOCACHE) - flags |= O_NOCACHE; -#endif /* O_NOCACHE */ - } - -#ifdef O_CLOEXEC - flags |= O_CLOEXEC; -#endif /* O_CLOEXEC */ - - *fd = open(pathname, flags, unix_mode_bits); -#if defined(O_DIRECT) - if (*fd < 0 && (flags & O_DIRECT) && - (errno == EINVAL || errno == EAFNOSUPPORT)) { - flags &= ~(O_DIRECT | O_EXCL); - *fd = open(pathname, flags, unix_mode_bits); - } -#endif /* O_DIRECT */ - if (*fd < 0) - return errno; - -#if defined(FD_CLOEXEC) && !defined(O_CLOEXEC) - const int fd_flags = fcntl(*fd, F_GETFD); - if (fd_flags != -1) - (void)fcntl(*fd, F_SETFD, fd_flags | FD_CLOEXEC); -#endif /* FD_CLOEXEC && !O_CLOEXEC */ - - if (direct_nocache_for_copy) { -#if defined(F_NOCACHE) && !defined(O_NOCACHE) - (void)fcntl(*fd, F_NOCACHE, 1); -#endif /* F_NOCACHE */ - } - -#endif - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_closefile(mdbx_filehandle_t fd) { -#if defined(_WIN32) || defined(_WIN64) - return CloseHandle(fd) ? MDBX_SUCCESS : GetLastError(); -#else - return (close(fd) == 0) ? MDBX_SUCCESS : errno; -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t bytes, - uint64_t offset) { - if (bytes > MAX_WRITE) - return MDBX_EINVAL; -#if defined(_WIN32) || defined(_WIN64) - OVERLAPPED ov; - ov.hEvent = 0; - ov.Offset = (DWORD)offset; - ov.OffsetHigh = HIGH_DWORD(offset); - - DWORD read = 0; - if (unlikely(!ReadFile(fd, buf, (DWORD)bytes, &read, &ov))) { - int rc = GetLastError(); - return (rc == MDBX_SUCCESS) ? /* paranoia */ ERROR_READ_FAULT : rc; - } -#else - STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - intptr_t read = pread(fd, buf, bytes, offset); - if (read < 0) { - int rc = errno; - return (rc == MDBX_SUCCESS) ? /* paranoia */ MDBX_EIO : rc; - } -#endif - return (bytes == (size_t)read) ? MDBX_SUCCESS : MDBX_ENODATA; -} - -MDBX_INTERNAL_FUNC int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, - size_t bytes, uint64_t offset) { - while (true) { -#if defined(_WIN32) || defined(_WIN64) - OVERLAPPED ov; - ov.hEvent = 0; - ov.Offset = (DWORD)offset; - ov.OffsetHigh = HIGH_DWORD(offset); - - DWORD written; - if (unlikely(!WriteFile( - fd, buf, likely(bytes <= MAX_WRITE) ? (DWORD)bytes : MAX_WRITE, - &written, &ov))) - return GetLastError(); - if (likely(bytes == written)) - return MDBX_SUCCESS; -#else - STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - const intptr_t written = - pwrite(fd, buf, likely(bytes <= MAX_WRITE) ? bytes : MAX_WRITE, offset); - if (likely(bytes == (size_t)written)) - return MDBX_SUCCESS; - if (written < 0) { - const int rc = errno; - if (rc != EINTR) - return rc; - continue; - } -#endif - bytes -= written; - offset += written; - buf = (char *)buf + written; - } -} - -MDBX_INTERNAL_FUNC int mdbx_write(mdbx_filehandle_t fd, const void *buf, - size_t bytes) { - while (true) { -#if defined(_WIN32) || defined(_WIN64) - DWORD written; - if (unlikely(!WriteFile( - fd, buf, likely(bytes <= MAX_WRITE) ? (DWORD)bytes : MAX_WRITE, - &written, nullptr))) - return GetLastError(); - if (likely(bytes == written)) - return MDBX_SUCCESS; -#else - STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - const intptr_t written = - write(fd, buf, likely(bytes <= MAX_WRITE) ? bytes : MAX_WRITE); - if (likely(bytes == (size_t)written)) - return MDBX_SUCCESS; - if (written < 0) { - const int rc = errno; - if (rc != EINTR) - return rc; - continue; - } -#endif - bytes -= written; - buf = (char *)buf + written; - } -} - -int mdbx_pwritev(mdbx_filehandle_t fd, struct iovec *iov, int iovcnt, - uint64_t offset, size_t expected_written) { -#if defined(_WIN32) || defined(_WIN64) || defined(__APPLE__) - size_t written = 0; - for (int i = 0; i < iovcnt; ++i) { - int rc = mdbx_pwrite(fd, iov[i].iov_base, iov[i].iov_len, offset); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - written += iov[i].iov_len; - offset += iov[i].iov_len; - } - return (expected_written == written) ? MDBX_SUCCESS - : MDBX_EIO /* ERROR_WRITE_FAULT */; -#else - int rc; - intptr_t written; - do { - STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - written = pwritev(fd, iov, iovcnt, offset); - if (likely(expected_written == (size_t)written)) - return MDBX_SUCCESS; - rc = errno; - } while (rc == EINTR); - return (written < 0) ? rc : MDBX_EIO /* Use which error code? */; -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_filesync(mdbx_filehandle_t fd, - enum mdbx_syncmode_bits mode_bits) { -#if defined(_WIN32) || defined(_WIN64) - return ((mode_bits & (MDBX_SYNC_DATA | MDBX_SYNC_IODQ)) == 0 || - FlushFileBuffers(fd)) - ? MDBX_SUCCESS - : GetLastError(); -#else - -#if defined(__APPLE__) && \ - MDBX_OSX_SPEED_INSTEADOF_DURABILITY == MDBX_OSX_WANNA_DURABILITY - if (mode_bits & MDBX_SYNC_IODQ) - return likely(fcntl(fd, F_FULLFSYNC) != -1) ? MDBX_SUCCESS : errno; -#endif /* MacOS */ -#if defined(__linux__) || defined(__gnu_linux__) - if (mode_bits == MDBX_SYNC_SIZE && mdbx_linux_kernel_version >= 0x03060000) - return MDBX_SUCCESS; -#endif /* Linux */ - int rc; - do { -#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0 - /* LY: This code is always safe and without appreciable performance - * degradation, even on a kernel with fdatasync's bug. - * - * For more info about of a corresponding fdatasync() bug - * see http://www.spinics.net/lists/linux-ext4/msg33714.html */ - if ((mode_bits & MDBX_SYNC_SIZE) == 0) { - if (fdatasync(fd) == 0) - return MDBX_SUCCESS; - } else -#else - (void)mode_bits; -#endif - if (fsync(fd) == 0) - return MDBX_SUCCESS; - rc = errno; - } while (rc == EINTR); - return rc; -#endif -} - -int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length) { -#if defined(_WIN32) || defined(_WIN64) - BY_HANDLE_FILE_INFORMATION info; - if (!GetFileInformationByHandle(fd, &info)) - return GetLastError(); - *length = info.nFileSizeLow | (uint64_t)info.nFileSizeHigh << 32; -#else - struct stat st; - - STATIC_ASSERT_MSG(sizeof(off_t) <= sizeof(uint64_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - if (fstat(fd, &st)) - return errno; - - *length = st.st_size; -#endif - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd) { -#if defined(_WIN32) || defined(_WIN64) - switch (GetFileType(fd)) { - case FILE_TYPE_DISK: - return MDBX_RESULT_FALSE; - case FILE_TYPE_CHAR: - case FILE_TYPE_PIPE: - return MDBX_RESULT_TRUE; - default: - return GetLastError(); - } -#else - struct stat info; - if (fstat(fd, &info)) - return errno; - switch (info.st_mode & S_IFMT) { - case S_IFBLK: - case S_IFREG: - return MDBX_RESULT_FALSE; - case S_IFCHR: - case S_IFIFO: - case S_IFSOCK: - return MDBX_RESULT_TRUE; - case S_IFDIR: - case S_IFLNK: - default: - return MDBX_INCOMPATIBLE; - } -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length) { -#if defined(_WIN32) || defined(_WIN64) - if (mdbx_SetFileInformationByHandle) { - FILE_END_OF_FILE_INFO EndOfFileInfo; - EndOfFileInfo.EndOfFile.QuadPart = length; - return mdbx_SetFileInformationByHandle(fd, FileEndOfFileInfo, - &EndOfFileInfo, - sizeof(FILE_END_OF_FILE_INFO)) - ? MDBX_SUCCESS - : GetLastError(); - } else { - LARGE_INTEGER li; - li.QuadPart = length; - return (SetFilePointerEx(fd, li, NULL, FILE_BEGIN) && SetEndOfFile(fd)) - ? MDBX_SUCCESS - : GetLastError(); - } -#else - STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - return ftruncate(fd, length) == 0 ? MDBX_SUCCESS : errno; -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_fseek(mdbx_filehandle_t fd, uint64_t pos) { -#if defined(_WIN32) || defined(_WIN64) - LARGE_INTEGER li; - li.QuadPart = pos; - return SetFilePointerEx(fd, li, NULL, FILE_BEGIN) ? MDBX_SUCCESS - : GetLastError(); -#else - STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - return (lseek(fd, pos, SEEK_SET) < 0) ? errno : MDBX_SUCCESS; -#endif -} - -/*----------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC int -mdbx_thread_create(mdbx_thread_t *thread, - THREAD_RESULT(THREAD_CALL *start_routine)(void *), - void *arg) { -#if defined(_WIN32) || defined(_WIN64) - *thread = CreateThread(NULL, 0, start_routine, arg, 0, NULL); - return *thread ? MDBX_SUCCESS : GetLastError(); -#else - return pthread_create(thread, NULL, start_routine, arg); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_thread_join(mdbx_thread_t thread) { -#if defined(_WIN32) || defined(_WIN64) - DWORD code = WaitForSingleObject(thread, INFINITE); - return waitstatus2errcode(code); -#else - void *unused_retval = &unused_retval; - return pthread_join(thread, &unused_retval); -#endif -} - -/*----------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC int mdbx_msync(mdbx_mmap_t *map, size_t offset, - size_t length, int async) { - uint8_t *ptr = (uint8_t *)map->address + offset; -#if defined(_WIN32) || defined(_WIN64) - if (FlushViewOfFile(ptr, length) && (async || FlushFileBuffers(map->fd))) - return MDBX_SUCCESS; - return GetLastError(); -#else -#if defined(__linux__) || defined(__gnu_linux__) - if (async && mdbx_linux_kernel_version > 0x02061300) - /* Since Linux 2.6.19, MS_ASYNC is in fact a no-op, - since the kernel properly tracks dirty pages and flushes them to storage - as necessary. */ - return MDBX_SUCCESS; -#endif /* Linux */ - const int mode = async ? MS_ASYNC : MS_SYNC; - int rc = (msync(ptr, length, mode) == 0) ? MDBX_SUCCESS : errno; - return rc; -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_check_fs_rdonly(mdbx_filehandle_t handle, - const char *pathname, int err) { -#if defined(_WIN32) || defined(_WIN64) - (void)pathname; - (void)err; - if (!mdbx_GetVolumeInformationByHandleW) - return MDBX_ENOSYS; - DWORD unused, flags; - if (!mdbx_GetVolumeInformationByHandleW(handle, nullptr, 0, nullptr, &unused, - &flags, nullptr, 0)) - return GetLastError(); - if ((flags & FILE_READ_ONLY_VOLUME) == 0) - return MDBX_EACCESS; -#else - struct statvfs info; - if (err != MDBX_ENOFILE) { - if (statvfs(pathname, &info)) - return errno; - if ((info.f_flag & ST_RDONLY) == 0) - return err; - } - if (fstatvfs(handle, &info)) - return errno; - if ((info.f_flag & ST_RDONLY) == 0) - return (err == MDBX_ENOFILE) ? MDBX_EACCESS : err; -#endif /* !Windows */ - return MDBX_SUCCESS; -} - -static int mdbx_check_fs_local(mdbx_filehandle_t handle, int flags) { - if (flags & MDBX_EXCLUSIVE) - return 0; - -#if defined(_WIN32) || defined(_WIN64) - if (mdbx_RunningUnderWine() && !(flags & MDBX_EXCLUSIVE)) - return ERROR_NOT_CAPABLE /* workaround for Wine */; - - if (GetFileType(handle) != FILE_TYPE_DISK) - return ERROR_FILE_OFFLINE; - - if (mdbx_GetFileInformationByHandleEx) { - FILE_REMOTE_PROTOCOL_INFO RemoteProtocolInfo; - if (mdbx_GetFileInformationByHandleEx(handle, FileRemoteProtocolInfo, - &RemoteProtocolInfo, - sizeof(RemoteProtocolInfo))) { - if ((RemoteProtocolInfo.Flags & REMOTE_PROTOCOL_INFO_FLAG_OFFLINE) && - !(flags & MDBX_RDONLY)) - return ERROR_FILE_OFFLINE; - if (!(RemoteProtocolInfo.Flags & REMOTE_PROTOCOL_INFO_FLAG_LOOPBACK) && - !(flags & MDBX_EXCLUSIVE)) - return ERROR_REMOTE_STORAGE_MEDIA_ERROR; - } - } - - if (mdbx_NtFsControlFile) { - NTSTATUS rc; - struct { - WOF_EXTERNAL_INFO wof_info; - union { - WIM_PROVIDER_EXTERNAL_INFO wim_info; - FILE_PROVIDER_EXTERNAL_INFO_V1 file_info; - }; - size_t reserved_for_microsoft_madness[42]; - } GetExternalBacking_OutputBuffer; - IO_STATUS_BLOCK StatusBlock; - rc = mdbx_NtFsControlFile(handle, NULL, NULL, NULL, &StatusBlock, - FSCTL_GET_EXTERNAL_BACKING, NULL, 0, - &GetExternalBacking_OutputBuffer, - sizeof(GetExternalBacking_OutputBuffer)); - if (NT_SUCCESS(rc)) { - if (!(flags & MDBX_EXCLUSIVE)) - return ERROR_REMOTE_STORAGE_MEDIA_ERROR; - } else if (rc != STATUS_OBJECT_NOT_EXTERNALLY_BACKED && - rc != STATUS_INVALID_DEVICE_REQUEST) - return ntstatus2errcode(rc); - } - - if (mdbx_GetVolumeInformationByHandleW && mdbx_GetFinalPathNameByHandleW) { - WCHAR *PathBuffer = mdbx_malloc(sizeof(WCHAR) * INT16_MAX); - if (!PathBuffer) - return MDBX_ENOMEM; - - int rc = MDBX_SUCCESS; - DWORD VolumeSerialNumber, FileSystemFlags; - if (!mdbx_GetVolumeInformationByHandleW(handle, PathBuffer, INT16_MAX, - &VolumeSerialNumber, NULL, - &FileSystemFlags, NULL, 0)) { - rc = GetLastError(); - goto bailout; - } - - if ((flags & MDBX_RDONLY) == 0) { - if (FileSystemFlags & - (FILE_SEQUENTIAL_WRITE_ONCE | FILE_READ_ONLY_VOLUME | - FILE_VOLUME_IS_COMPRESSED)) { - rc = ERROR_REMOTE_STORAGE_MEDIA_ERROR; - goto bailout; - } - } - - if (!mdbx_GetFinalPathNameByHandleW(handle, PathBuffer, INT16_MAX, - FILE_NAME_NORMALIZED | - VOLUME_NAME_NT)) { - rc = GetLastError(); - goto bailout; - } - - if (_wcsnicmp(PathBuffer, L"\\Device\\Mup\\", 12) == 0) { - if (!(flags & MDBX_EXCLUSIVE)) { - rc = ERROR_REMOTE_STORAGE_MEDIA_ERROR; - goto bailout; - } - } else if (mdbx_GetFinalPathNameByHandleW(handle, PathBuffer, INT16_MAX, - FILE_NAME_NORMALIZED | - VOLUME_NAME_DOS)) { - UINT DriveType = GetDriveTypeW(PathBuffer); - if (DriveType == DRIVE_NO_ROOT_DIR && - _wcsnicmp(PathBuffer, L"\\\\?\\", 4) == 0 && - _wcsnicmp(PathBuffer + 5, L":\\", 2) == 0) { - PathBuffer[7] = 0; - DriveType = GetDriveTypeW(PathBuffer + 4); - } - switch (DriveType) { - case DRIVE_CDROM: - if (flags & MDBX_RDONLY) - break; - // fall through - case DRIVE_UNKNOWN: - case DRIVE_NO_ROOT_DIR: - case DRIVE_REMOTE: - default: - if (!(flags & MDBX_EXCLUSIVE)) - rc = ERROR_REMOTE_STORAGE_MEDIA_ERROR; - // fall through - case DRIVE_REMOVABLE: - case DRIVE_FIXED: - case DRIVE_RAMDISK: - break; - } - } - bailout: - mdbx_free(PathBuffer); - return rc; - } -#else - - struct statvfs statvfs_info; - if (fstatvfs(handle, &statvfs_info)) - return errno; -#if defined(ST_LOCAL) || defined(ST_EXPORTED) - const unsigned long st_flags = statvfs_info.f_flag; -#endif /* ST_LOCAL || ST_EXPORTED */ - -#if defined(__NetBSD__) - const unsigned type = 0; - const char *const name = statvfs_info.f_fstypename; - const size_t name_len = VFS_NAMELEN; -#elif defined(_AIX) || defined(__OS400__) - const char *const name = statvfs_info.f_basetype; - const size_t name_len = sizeof(statvfs_info.f_basetype); - struct stat st; - if (fstat(handle, &st)) - return errno; - const unsigned type = st.st_vfstype; - if ((st.st_flag & FS_REMOTE) != 0 && !(flags & MDBX_EXCLUSIVE)) - return MDBX_EREMOTE; -#elif defined(FSTYPSZ) || defined(_FSTYPSZ) - const unsigned type = 0; - const char *const name = statvfs_info.f_basetype; - const size_t name_len = sizeof(statvfs_info.f_basetype); -#elif defined(__sun) || defined(__SVR4) || defined(__svr4__) || \ - defined(ST_FSTYPSZ) || defined(_ST_FSTYPSZ) - const unsigned type = 0; - struct stat st; - if (fstat(handle, &st)) - return errno; - const char *const name = st.st_fstype; - const size_t name_len = strlen(name); -#else - struct statfs statfs_info; - if (fstatfs(handle, &statfs_info)) - return errno; -#if defined(__OpenBSD__) - const unsigned type = 0; -#else - const unsigned type = statfs_info.f_type; -#endif -#if defined(MNT_LOCAL) || defined(MNT_EXPORTED) - const unsigned long mnt_flags = statfs_info.f_flags; -#endif /* MNT_LOCAL || MNT_EXPORTED */ -#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ - defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \ - defined(__APPLE__) || defined(__MACH__) || defined(MFSNAMELEN) || \ - defined(MFSTYPENAMELEN) || defined(VFS_NAMELEN) - const char *const name = statfs_info.f_fstypename; - const size_t name_len = sizeof(statfs_info.f_fstypename); -#else - - const char *name = ""; - unsigned name_len = 0; - - struct stat st; - if (fstat(handle, &st)) - return errno; - - char pathbuf[PATH_MAX]; - FILE *mounted = nullptr; -#if defined(__linux__) || defined(__gnu_linux__) - mounted = setmntent("/proc/mounts", "r"); -#endif /* Linux */ - if (!mounted) - mounted = setmntent("/etc/mtab", "r"); - if (mounted) { - const struct mntent *ent; -#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || \ - (defined(_DEFAULT_SOURCE) && __GLIBC_PREREQ(2, 19)) - struct mntent entbuf; - const bool should_copy = false; - while (nullptr != - (ent = getmntent_r(mounted, &entbuf, pathbuf, sizeof(pathbuf)))) -#else - const bool should_copy = true; - while (nullptr != (ent = getmntent(mounted)))) -#endif - { - struct stat mnt; - if (!stat(ent->mnt_dir, &mnt) && mnt.st_dev == st.st_dev) { - if (should_copy) { - name = - strncpy(pathbuf, ent->mnt_fsname, name_len = sizeof(pathbuf) - 1); - pathbuf[name_len] = 0; - } else { - name = ent->mnt_fsname; - name_len = strlen(name); - } - break; - } - } - endmntent(mounted); - } -#endif /* !xBSD */ -#endif - - if (name_len) { - if (((name_len > 2 && strncasecmp("nfs", name, 3) == 0) || - strncasecmp("cifs", name, name_len) == 0 || - strncasecmp("ncpfs", name, name_len) == 0 || - strncasecmp("smbfs", name, name_len) == 0 || - ((name_len > 3 && strncasecmp("fuse", name, 4) == 0) && - strncasecmp("fuseblk", name, name_len) != 0)) && - !(flags & MDBX_EXCLUSIVE)) - return MDBX_EREMOTE; - if (strcasecmp("ftp", name) == 0 || strcasecmp("http", name) == 0 || - strcasecmp("sshfs", name) == 0) - return MDBX_EREMOTE; - } - -#ifdef ST_LOCAL - if ((st_flags & ST_LOCAL) == 0 && !(flags & MDBX_EXCLUSIVE)) - return MDBX_EREMOTE; -#elif defined(MNT_LOCAL) - if ((mnt_flags & MNT_LOCAL) == 0 && !(flags & MDBX_EXCLUSIVE)) - return MDBX_EREMOTE; -#endif /* ST/MNT_LOCAL */ - -#ifdef ST_EXPORTED - if ((st_flags & ST_EXPORTED) != 0 && !(flags & MDBX_RDONLY)) - return MDBX_EREMOTE; -#elif defined(MNT_EXPORTED) - if ((mnt_flags & MNT_EXPORTED) != 0 && !(flags & MDBX_RDONLY)) - return MDBX_EREMOTE; -#endif /* ST/MNT_EXPORTED */ - - switch (type) { - case 0xFF534D42 /* CIFS_MAGIC_NUMBER */: - case 0x6969 /* NFS_SUPER_MAGIC */: - case 0x564c /* NCP_SUPER_MAGIC */: - case 0x517B /* SMB_SUPER_MAGIC */: -#if defined(__digital__) || defined(__osf__) || defined(__osf) - case 0x0E /* Tru64 NFS */: -#endif -#ifdef ST_FST_NFS - case ST_FST_NFS: -#endif - if ((flags & MDBX_EXCLUSIVE) == 0) - return MDBX_EREMOTE; - case 0: - default: - break; - } -#endif /* Unix */ - - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map, - const size_t size, const size_t limit, - const unsigned options) { - assert(size <= limit); - map->limit = 0; - map->current = 0; - map->address = nullptr; -#if defined(_WIN32) || defined(_WIN64) - map->section = NULL; - map->filesize = 0; -#endif /* Windows */ - - int err = mdbx_check_fs_local(map->fd, flags); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - if ((flags & MDBX_RDONLY) == 0 && (options & MMAP_OPTION_TRUNCATE) != 0) { - err = mdbx_ftruncate(map->fd, size); - if (err != MDBX_SUCCESS) - return err; -#if defined(_WIN32) || defined(_WIN64) - map->filesize = size; -#else - map->current = size; -#endif - } else { - uint64_t filesize = 0; - err = mdbx_filesize(map->fd, &filesize); - if (err != MDBX_SUCCESS) - return err; -#if defined(_WIN32) || defined(_WIN64) - map->filesize = filesize; -#else - map->current = (filesize > limit) ? limit : (size_t)filesize; -#endif - } - -#if defined(_WIN32) || defined(_WIN64) - LARGE_INTEGER SectionSize; - SectionSize.QuadPart = size; - err = NtCreateSection( - &map->section, - /* DesiredAccess */ - (flags & MDBX_WRITEMAP) - ? SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE | - SECTION_MAP_WRITE - : SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE, - /* ObjectAttributes */ NULL, /* MaximumSize (InitialSize) */ &SectionSize, - /* SectionPageProtection */ - (flags & MDBX_RDONLY) ? PAGE_READONLY : PAGE_READWRITE, - /* AllocationAttributes */ SEC_RESERVE, map->fd); - if (!NT_SUCCESS(err)) - return ntstatus2errcode(err); - - SIZE_T ViewSize = - (flags & MDBX_RDONLY) ? 0 : mdbx_RunningUnderWine() ? size : limit; - err = NtMapViewOfSection( - map->section, GetCurrentProcess(), &map->address, - /* ZeroBits */ 0, - /* CommitSize */ 0, - /* SectionOffset */ NULL, &ViewSize, - /* InheritDisposition */ ViewUnmap, - /* AllocationType */ (flags & MDBX_RDONLY) ? 0 : MEM_RESERVE, - /* Win32Protect */ - (flags & MDBX_WRITEMAP) ? PAGE_READWRITE : PAGE_READONLY); - if (!NT_SUCCESS(err)) { - NtClose(map->section); - map->section = 0; - map->address = nullptr; - return ntstatus2errcode(err); - } - assert(map->address != MAP_FAILED); - - map->current = (size_t)SectionSize.QuadPart; - map->limit = ViewSize; - -#else - -#ifndef MAP_TRYFIXED -#define MAP_TRYFIXED 0 -#endif - -#ifndef MAP_HASSEMAPHORE -#define MAP_HASSEMAPHORE 0 -#endif - -#ifndef MAP_CONCEAL -#define MAP_CONCEAL 0 -#endif - -#ifndef MAP_NOSYNC -#define MAP_NOSYNC 0 -#endif - - map->address = mmap( - NULL, limit, (flags & MDBX_WRITEMAP) ? PROT_READ | PROT_WRITE : PROT_READ, - MAP_SHARED | MAP_FILE | - (F_ISSET(flags, MDBX_UTTERLY_NOSYNC) ? MAP_NOSYNC : 0) | - ((options & MMAP_OPTION_SEMAPHORE) ? MAP_HASSEMAPHORE | MAP_NOSYNC - : MAP_CONCEAL), - map->fd, 0); - - if (unlikely(map->address == MAP_FAILED)) { - map->limit = 0; - map->current = 0; - map->address = nullptr; - return errno; - } - map->limit = limit; - -#ifdef MADV_DONTFORK - if (unlikely(madvise(map->address, map->limit, MADV_DONTFORK) != 0)) - return errno; -#endif -#ifdef MADV_NOHUGEPAGE - (void)madvise(map->address, map->limit, MADV_NOHUGEPAGE); -#endif - -#endif - - VALGRIND_MAKE_MEM_DEFINED(map->address, map->current); - ASAN_UNPOISON_MEMORY_REGION(map->address, map->current); - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_munmap(mdbx_mmap_t *map) { - VALGRIND_MAKE_MEM_NOACCESS(map->address, map->current); - ASAN_POISON_MEMORY_REGION(map->address, map->current); -#if defined(_WIN32) || defined(_WIN64) - if (map->section) - NtClose(map->section); - NTSTATUS rc = NtUnmapViewOfSection(GetCurrentProcess(), map->address); - if (!NT_SUCCESS(rc)) - ntstatus2errcode(rc); -#else - if (unlikely(munmap(map->address, map->limit))) - return errno; -#endif - - map->limit = 0; - map->current = 0; - map->address = nullptr; - return MDBX_SUCCESS; -} - -MDBX_INTERNAL_FUNC int mdbx_mresize(int flags, mdbx_mmap_t *map, size_t size, - size_t limit) { - assert(size <= limit); -#if defined(_WIN32) || defined(_WIN64) - assert(size != map->current || limit != map->limit || size < map->filesize); - - NTSTATUS status; - LARGE_INTEGER SectionSize; - int err, rc = MDBX_SUCCESS; - - if (!(flags & MDBX_RDONLY) && limit == map->limit && size > map->current) { - /* growth rw-section */ - if (!mdbx_NtExtendSection) - return MDBX_UNABLE_EXTEND_MAPSIZE /* workaround for Wine */; - SectionSize.QuadPart = size; - status = mdbx_NtExtendSection(map->section, &SectionSize); - if (!NT_SUCCESS(status)) - return ntstatus2errcode(status); - map->current = size; - if (map->filesize < size) - map->filesize = size; - return MDBX_SUCCESS; - } - - if (limit > map->limit) { - /* check ability of address space for growth before unmap */ - PVOID BaseAddress = (PBYTE)map->address + map->limit; - SIZE_T RegionSize = limit - map->limit; - status = NtAllocateVirtualMemory(GetCurrentProcess(), &BaseAddress, 0, - &RegionSize, MEM_RESERVE, PAGE_NOACCESS); - if (status == /* STATUS_CONFLICTING_ADDRESSES */ 0xC0000018) - return MDBX_UNABLE_EXTEND_MAPSIZE; - if (!NT_SUCCESS(status)) - return ntstatus2errcode(status); - - status = NtFreeVirtualMemory(GetCurrentProcess(), &BaseAddress, &RegionSize, - MEM_RELEASE); - if (!NT_SUCCESS(status)) - return ntstatus2errcode(status); - } - - /* Windows unable: - * - shrink a mapped file; - * - change size of mapped view; - * - extend read-only mapping; - * Therefore we should unmap/map entire section. */ - status = NtUnmapViewOfSection(GetCurrentProcess(), map->address); - if (!NT_SUCCESS(status)) - return ntstatus2errcode(status); - status = NtClose(map->section); - map->section = NULL; - PVOID ReservedAddress = NULL; - SIZE_T ReservedSize = limit; - - if (!NT_SUCCESS(status)) { - bailout_ntstatus: - err = ntstatus2errcode(status); - bailout: - map->address = NULL; - map->current = map->limit = 0; - if (ReservedAddress) { - ReservedSize = 0; - status = NtFreeVirtualMemory(GetCurrentProcess(), &ReservedAddress, - &ReservedSize, MEM_RELEASE); - assert(NT_SUCCESS(status)); - (void)status; - } - return err; - } - - /* resizing of the file may take a while, - * therefore we reserve address space to avoid occupy it by other threads */ - ReservedAddress = map->address; - status = NtAllocateVirtualMemory(GetCurrentProcess(), &ReservedAddress, 0, - &ReservedSize, MEM_RESERVE, PAGE_NOACCESS); - if (!NT_SUCCESS(status)) { - ReservedAddress = NULL; - if (status != /* STATUS_CONFLICTING_ADDRESSES */ 0xC0000018) - goto bailout_ntstatus /* no way to recovery */; - - /* assume we can change base address if mapping size changed or prev address - * couldn't be used */ - map->address = NULL; - } - -retry_file_and_section: - err = mdbx_filesize(map->fd, &map->filesize); - if (err != MDBX_SUCCESS) - goto bailout; - - if ((flags & MDBX_RDONLY) == 0 && map->filesize != size) { - err = mdbx_ftruncate(map->fd, size); - if (err == MDBX_SUCCESS) - map->filesize = size; - /* ignore error, because Windows unable shrink file - * that already mapped (by another process) */ - } - - SectionSize.QuadPart = size; - status = NtCreateSection( - &map->section, - /* DesiredAccess */ - (flags & MDBX_WRITEMAP) - ? SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE | - SECTION_MAP_WRITE - : SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE, - /* ObjectAttributes */ NULL, - /* MaximumSize (InitialSize) */ &SectionSize, - /* SectionPageProtection */ - (flags & MDBX_RDONLY) ? PAGE_READONLY : PAGE_READWRITE, - /* AllocationAttributes */ SEC_RESERVE, map->fd); - - if (!NT_SUCCESS(status)) - goto bailout_ntstatus; - - if (ReservedAddress) { - /* release reserved address space */ - ReservedSize = 0; - status = NtFreeVirtualMemory(GetCurrentProcess(), &ReservedAddress, - &ReservedSize, MEM_RELEASE); - ReservedAddress = NULL; - if (!NT_SUCCESS(status)) - goto bailout_ntstatus; - } - -retry_mapview:; - SIZE_T ViewSize = (flags & MDBX_RDONLY) ? size : limit; - status = NtMapViewOfSection( - map->section, GetCurrentProcess(), &map->address, - /* ZeroBits */ 0, - /* CommitSize */ 0, - /* SectionOffset */ NULL, &ViewSize, - /* InheritDisposition */ ViewUnmap, - /* AllocationType */ (flags & MDBX_RDONLY) ? 0 : MEM_RESERVE, - /* Win32Protect */ - (flags & MDBX_WRITEMAP) ? PAGE_READWRITE : PAGE_READONLY); - - if (!NT_SUCCESS(status)) { - if (status == /* STATUS_CONFLICTING_ADDRESSES */ 0xC0000018 && - map->address) { - /* try remap at another base address */ - map->address = NULL; - goto retry_mapview; - } - NtClose(map->section); - map->section = NULL; - - if (map->address && (size != map->current || limit != map->limit)) { - /* try remap with previously size and limit, - * but will return MDBX_UNABLE_EXTEND_MAPSIZE on success */ - rc = MDBX_UNABLE_EXTEND_MAPSIZE; - size = map->current; - limit = map->limit; - goto retry_file_and_section; - } - - /* no way to recovery */ - goto bailout_ntstatus; - } - assert(map->address != MAP_FAILED); - - map->current = (size_t)SectionSize.QuadPart; - map->limit = ViewSize; -#else - - uint64_t filesize = 0; - int rc = mdbx_filesize(map->fd, &filesize); - if (rc != MDBX_SUCCESS) - return rc; - - if (flags & MDBX_RDONLY) { - map->current = (filesize > limit) ? limit : (size_t)filesize; - if (map->current != size) - rc = MDBX_UNABLE_EXTEND_MAPSIZE; - } else if (filesize != size) { - rc = mdbx_ftruncate(map->fd, size); - if (rc != MDBX_SUCCESS) - return rc; - map->current = size; - } - - if (limit != map->limit) { -#if defined(MREMAP_MAYMOVE) - void *ptr = mremap(map->address, map->limit, limit, 0); - if (ptr == MAP_FAILED) { - rc = errno; - switch (rc) { - case EAGAIN: - case ENOMEM: - case EFAULT /* MADV_DODUMP / MADV_DONTDUMP are mixed for mmap-range */: - rc = MDBX_UNABLE_EXTEND_MAPSIZE; - } - return rc; - } - map->address = ptr; - map->limit = limit; - -#ifdef MADV_DONTFORK - if (unlikely(madvise(map->address, map->limit, MADV_DONTFORK) != 0)) - return errno; -#endif /* MADV_DONTFORK */ - -#ifdef MADV_NOHUGEPAGE - (void)madvise(map->address, map->limit, MADV_NOHUGEPAGE); -#endif /* MADV_NOHUGEPAGE */ - -#else /* MREMAP_MAYMOVE */ - /* TODO: Perhaps here it is worth to implement suspend/resume threads - * and perform unmap/map as like for Windows. */ - rc = MDBX_UNABLE_EXTEND_MAPSIZE; -#endif /* !MREMAP_MAYMOVE */ - } -#endif - return rc; -} - -/*----------------------------------------------------------------------------*/ - -MDBX_INTERNAL_FUNC __cold void mdbx_osal_jitter(bool tiny) { - for (;;) { -#if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || \ - defined(__x86_64__) - const unsigned salt = 277u * (unsigned)__rdtsc(); -#else - const unsigned salt = rand(); -#endif - - const unsigned coin = salt % (tiny ? 29u : 43u); - if (coin < 43 / 3) - break; -#if defined(_WIN32) || defined(_WIN64) - SwitchToThread(); - if (coin > 43 * 2 / 3) - Sleep(1); -#else - sched_yield(); - if (coin > 43 * 2 / 3) - usleep(coin); -#endif - } -} - -#if defined(_WIN32) || defined(_WIN64) -#elif defined(__APPLE__) || defined(__MACH__) -#include -#elif defined(__linux__) || defined(__gnu_linux__) -static __cold clockid_t choice_monoclock(void) { - struct timespec probe; -#if defined(CLOCK_BOOTTIME) - if (clock_gettime(CLOCK_BOOTTIME, &probe) == 0) - return CLOCK_BOOTTIME; -#elif defined(CLOCK_MONOTONIC_RAW) - if (clock_gettime(CLOCK_MONOTONIC_RAW, &probe) == 0) - return CLOCK_MONOTONIC_RAW; -#elif defined(CLOCK_MONOTONIC_COARSE) - if (clock_gettime(CLOCK_MONOTONIC_COARSE, &probe) == 0) - return CLOCK_MONOTONIC_COARSE; -#endif - return CLOCK_MONOTONIC; -} -#endif - -/*----------------------------------------------------------------------------*/ - -#if defined(_WIN32) || defined(_WIN64) -static LARGE_INTEGER performance_frequency; -#elif defined(__APPLE__) || defined(__MACH__) -static uint64_t ratio_16dot16_to_monotine; -#endif - -MDBX_INTERNAL_FUNC uint64_t -mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16) { -#if defined(_WIN32) || defined(_WIN64) - if (unlikely(performance_frequency.QuadPart == 0)) - QueryPerformanceFrequency(&performance_frequency); - const uint64_t ratio = performance_frequency.QuadPart; -#elif defined(__APPLE__) || defined(__MACH__) - if (unlikely(ratio_16dot16_to_monotine == 0)) { - mach_timebase_info_data_t ti; - mach_timebase_info(&ti); - ratio_16dot16_to_monotine = UINT64_C(1000000000) * ti.denom / ti.numer; - } - const uint64_t ratio = ratio_16dot16_to_monotine; -#else - const uint64_t ratio = UINT64_C(1000000000); -#endif - return (ratio * seconds_16dot16 + 32768) >> 16; -} - -MDBX_INTERNAL_FUNC uint32_t mdbx_osal_monotime_to_16dot16(uint64_t monotime) { - static uint64_t limit; - if (unlikely(monotime > limit)) { - if (limit != 0) - return UINT32_MAX; - limit = mdbx_osal_16dot16_to_monotime(UINT32_MAX - 1); - if (monotime > limit) - return UINT32_MAX; - } -#if defined(_WIN32) || defined(_WIN64) - return (uint32_t)((monotime << 16) / performance_frequency.QuadPart); -#elif defined(__APPLE__) || defined(__MACH__) - return (uint32_t)((monotime << 16) / ratio_16dot16_to_monotine); -#else - return (uint32_t)(monotime * 128 / 1953125); -#endif -} - -MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void) { -#if defined(_WIN32) || defined(_WIN64) - LARGE_INTEGER counter; - counter.QuadPart = 0; - QueryPerformanceCounter(&counter); - return counter.QuadPart; -#elif defined(__APPLE__) || defined(__MACH__) - return mach_absolute_time(); -#else - -#if defined(__linux__) || defined(__gnu_linux__) - static clockid_t posix_clockid = -1; - if (unlikely(posix_clockid < 0)) - posix_clockid = choice_monoclock(); -#elif defined(CLOCK_MONOTONIC) -#define posix_clockid CLOCK_MONOTONIC -#else -#define posix_clockid CLOCK_REALTIME -#endif - - struct timespec ts; - if (unlikely(clock_gettime(posix_clockid, &ts) != 0)) { - ts.tv_nsec = 0; - ts.tv_sec = 0; - } - return ts.tv_sec * UINT64_C(1000000000) + ts.tv_nsec; -#endif -} - -/*----------------------------------------------------------------------------*/ - -static void bootid_shake(bin128_t *p) { - /* Bob Jenkins's PRNG: https://burtleburtle.net/bob/rand/smallprng.html */ - const uint32_t e = p->a - (p->b << 23 | p->b >> 9); - p->a = p->b ^ (p->c << 16 | p->c >> 16); - p->b = p->c + (p->d << 11 | p->d >> 21); - p->c = p->d + e; - p->d = e + p->a; -} - -static void bootid_collect(bin128_t *p, const void *s, size_t n) { - p->y += UINT64_C(64526882297375213); - bootid_shake(p); - for (size_t i = 0; i < n; ++i) { - bootid_shake(p); - p->y ^= UINT64_C(48797879452804441) * ((const uint8_t *)s)[i]; - bootid_shake(p); - p->y += 14621231; - } - bootid_shake(p); - - /* minor non-linear tomfoolery */ - const unsigned z = p->x % 61; - p->y = p->y << z | p->y >> (64 - z); - bootid_shake(p); - bootid_shake(p); - const unsigned q = p->x % 59; - p->y = p->y << q | p->y >> (64 - q); - bootid_shake(p); - bootid_shake(p); - bootid_shake(p); -} - -#if defined(_WIN32) || defined(_WIN64) - -static uint64_t windows_systemtime_ms() { - FILETIME ft; - GetSystemTimeAsFileTime(&ft); - return ((uint64_t)ft.dwHighDateTime << 32 | ft.dwLowDateTime) / 10000ul; -} - -static uint64_t windows_bootime(void) { - unsigned confirmed = 0; - uint64_t boottime = 0; - uint64_t up0 = mdbx_GetTickCount64(); - uint64_t st0 = windows_systemtime_ms(); - for (uint64_t fuse = st0; up0 && st0 < fuse + 1000 * 1000u / 42;) { - YieldProcessor(); - const uint64_t up1 = mdbx_GetTickCount64(); - const uint64_t st1 = windows_systemtime_ms(); - if (st1 > fuse && st1 == st0 && up1 == up0) { - uint64_t diff = st1 - up1; - if (boottime == diff) { - if (++confirmed > 4) - return boottime; - } else { - confirmed = 0; - boottime = diff; - } - fuse = st1; - Sleep(1); - } - st0 = st1; - up0 = up1; - } - return 0; -} - -typedef LSTATUS (APIENTRY *pfnRegGetValueA)(HKEY, LPCSTR, LPCSTR, DWORD, LPDWORD, PVOID, LPDWORD); -static pfnRegGetValueA fnRegGetValueA = nullptr; - -static LSTATUS APIENTRY stubRegGetValueA(HKEY hkey, LPCSTR lpSubKey, LPCSTR lpValue, DWORD dwFlags, LPDWORD pdwType, PVOID pvData, LPDWORD pcbData) -{ - HKEY tmp; - LSTATUS rc = RegOpenKeyA(hkey, lpSubKey, &tmp); - if (rc != 0) - return rc; - - DWORD dwType = (dwFlags == RRF_RT_ANY) ? REG_SZ : REG_DWORD; - rc = RegQueryValueExA(tmp, lpValue, 0, &dwType, pvData, pcbData); - if (rc != 0 && dwFlags == RRF_RT_DWORD) { - rc = 0; - *(DWORD *)pvData = 0xBABAEBA; - *pcbData = sizeof(DWORD); - } - RegCloseKey(tmp); - return rc; -} - -static LSTATUS mdbx_RegGetValue(HKEY hkey, LPCSTR lpSubKey, LPCSTR lpValue, - DWORD dwFlags, LPDWORD pdwType, PVOID pvData, - LPDWORD pcbData) { - if (fnRegGetValueA == nullptr) { - fnRegGetValueA = (pfnRegGetValueA)GetProcAddress(GetModuleHandleA("advapi32.dll"), "RegGetValueA"); - if (fnRegGetValueA == nullptr) - fnRegGetValueA = stubRegGetValueA; - } - - LSTATUS rc = - fnRegGetValueA(hkey, lpSubKey, lpValue, dwFlags, pdwType, pvData, pcbData); - if (rc != ERROR_FILE_NOT_FOUND) - return rc; - - rc = fnRegGetValueA(hkey, lpSubKey, lpValue, - dwFlags | 0x00010000 /* RRF_SUBKEY_WOW6464KEY */, pdwType, - pvData, pcbData); - if (rc != ERROR_FILE_NOT_FOUND) - return rc; - return fnRegGetValueA(hkey, lpSubKey, lpValue, - dwFlags | 0x00020000 /* RRF_SUBKEY_WOW6432KEY */, pdwType, - pvData, pcbData); -} -#endif - -static __cold __maybe_unused bool bootid_parse_uuid(bin128_t *s, const void *p, - const size_t n) { - if (n > 31) { - unsigned bits = 0; - for (unsigned i = 0; i < n; ++i) /* try parse an UUID in text form */ { - uint8_t c = ((const uint8_t *)p)[i]; - if (c >= '0' && c <= '9') - c -= '0'; - else if (c >= 'a' && c <= 'f') - c -= 'a' - 10; - else if (c >= 'A' && c <= 'F') - c -= 'A' - 10; - else - continue; - assert(c <= 15); - c ^= s->y >> 60; - s->y = s->y << 4 | s->x >> 60; - s->x = s->x << 4 | c; - bits += 4; - } - if (bits > 42 * 3) - /* UUID parsed successfully */ - return true; - } - - if (n > 15) /* is enough handle it as a binary? */ { - if (n == sizeof(bin128_t)) { - bin128_t aligned; - memcpy(&aligned, p, sizeof(bin128_t)); - s->x += aligned.x; - s->y += aligned.y; - } else - bootid_collect(s, p, n); - return true; - } - - if (n) - bootid_collect(s, p, n); - return false; -} - -__cold MDBX_INTERNAL_FUNC bin128_t mdbx_osal_bootid(void) { - bin128_t bin = {{0, 0}}; - bool got_machineid = false, got_boottime = false, got_bootseq = false; - -#if defined(__linux__) || defined(__gnu_linux__) - { - const int fd = - open("/proc/sys/kernel/random/boot_id", O_RDONLY | O_NOFOLLOW); - if (fd != -1) { - struct statfs fs; - char buf[42]; - const ssize_t len = - (fstatfs(fd, &fs) == 0 && fs.f_type == /* procfs */ 0x9FA0) - ? read(fd, buf, sizeof(buf)) - : -1; - close(fd); - if (len > 0 && bootid_parse_uuid(&bin, buf, len)) - return bin; - } - } -#endif /* Linux */ - -#if defined(__APPLE__) || defined(__MACH__) - { - char buf[42]; - size_t len = sizeof(buf); - if (!sysctlbyname("kern.bootsessionuuid", buf, &len, nullptr, 0) && - bootid_parse_uuid(&bin, buf, len)) - return bin; - -#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \ - __MAC_OS_X_VERSION_MIN_REQUIRED > 1050 - uuid_t uuid; - struct timespec wait = {0, 1000000000u / 42}; - if (!gethostuuid(uuid, &wait) && - bootid_parse_uuid(&bin, uuid, sizeof(uuid))) - got_machineid = true; -#endif /* > 10.5 */ - - struct timeval boottime; - len = sizeof(boottime); - if (!sysctlbyname("kern.boottime", &boottime, &len, nullptr, 0) && - len == sizeof(boottime) && boottime.tv_sec) - got_boottime = true; - } -#endif /* Apple/Darwin */ - -#if defined(_WIN32) || defined(_WIN64) - { - union buf { - DWORD BootId; - DWORD BaseTime; - SYSTEM_TIMEOFDAY_INFORMATION SysTimeOfDayInfo; - struct { - LARGE_INTEGER BootTime; - LARGE_INTEGER CurrentTime; - LARGE_INTEGER TimeZoneBias; - ULONG TimeZoneId; - ULONG Reserved; - ULONGLONG BootTimeBias; - ULONGLONG SleepTimeBias; - } SysTimeOfDayInfoHacked; - wchar_t MachineGuid[42]; - char DigitalProductId[248]; - } buf; - - static const char HKLM_MicrosoftCryptography[] = - "SOFTWARE\\Microsoft\\Cryptography"; - DWORD len = sizeof(buf); - /* Windows is madness and must die */ - if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_MicrosoftCryptography, - "MachineGuid", RRF_RT_ANY, NULL, &buf.MachineGuid, - &len) == ERROR_SUCCESS && - len > 42 && len < sizeof(buf)) - got_machineid = bootid_parse_uuid(&bin, &buf.MachineGuid, len); - - if (!got_machineid) { - /* again, Windows is madness */ - static const char HKLM_WindowsNT[] = - "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"; - static const char HKLM_WindowsNT_DPK[] = - "SOFTWARE\\Microsoft\\Windows " - "NT\\CurrentVersion\\DefaultProductKey"; - static const char HKLM_WindowsNT_DPK2[] = - "SOFTWARE\\Microsoft\\Windows " - "NT\\CurrentVersion\\DefaultProductKey2"; - - len = sizeof(buf); - if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_WindowsNT, - "DigitalProductId", RRF_RT_ANY, NULL, - &buf.DigitalProductId, &len) == ERROR_SUCCESS && - len > 42 && len < sizeof(buf)) { - bootid_collect(&bin, &buf.DigitalProductId, len); - got_machineid = true; - } - len = sizeof(buf); - if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_WindowsNT_DPK, - "DigitalProductId", RRF_RT_ANY, NULL, - &buf.DigitalProductId, &len) == ERROR_SUCCESS && - len > 42 && len < sizeof(buf)) { - bootid_collect(&bin, &buf.DigitalProductId, len); - got_machineid = true; - } - len = sizeof(buf); - if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_WindowsNT_DPK2, - "DigitalProductId", RRF_RT_ANY, NULL, - &buf.DigitalProductId, &len) == ERROR_SUCCESS && - len > 42 && len < sizeof(buf)) { - bootid_collect(&bin, &buf.DigitalProductId, len); - got_machineid = true; - } - } - - static const char HKLM_PrefetcherParams[] = - "SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Memory " - "Management\\PrefetchParameters"; - len = sizeof(buf); - if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_PrefetcherParams, "BootId", - RRF_RT_DWORD, NULL, &buf.BootId, - &len) == ERROR_SUCCESS && - len > 1 && len < sizeof(buf)) { - bootid_collect(&bin, &buf.BootId, len); - got_bootseq = true; - } - - len = sizeof(buf); - if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_PrefetcherParams, "BaseTime", - RRF_RT_DWORD, NULL, &buf.BaseTime, - &len) == ERROR_SUCCESS && - len >= sizeof(buf.BaseTime) && buf.BaseTime) { - bootid_collect(&bin, &buf.BaseTime, len); - got_boottime = true; - } - - /* BootTime from SYSTEM_TIMEOFDAY_INFORMATION */ - NTSTATUS status = NtQuerySystemInformation( - 0x03 /* SystemTmeOfDayInformation */, &buf.SysTimeOfDayInfo, - sizeof(buf.SysTimeOfDayInfo), &len); - if (NT_SUCCESS(status) && - len >= offsetof(union buf, SysTimeOfDayInfoHacked.BootTime) + - sizeof(buf.SysTimeOfDayInfoHacked.BootTime) && - buf.SysTimeOfDayInfoHacked.BootTime.QuadPart) { - bootid_collect(&bin, &buf.SysTimeOfDayInfoHacked.BootTime, - sizeof(buf.SysTimeOfDayInfoHacked.BootTime)); - got_boottime = true; - } - - if (!got_boottime) { - uint64_t boottime = windows_bootime(); - if (boottime) { - bootid_collect(&bin, &boottime, sizeof(boottime)); - got_boottime = true; - } - } - } -#endif /* Windows */ - -#if defined(CTL_HW) && defined(HW_UUID) - if (!got_machineid) { - static const int mib[] = {CTL_HW, HW_UUID}; - char buf[42]; - size_t len = sizeof(buf); - if (sysctl( -#ifdef SYSCTL_LEGACY_NONCONST_MIB - (int *) -#endif - mib, - ARRAY_LENGTH(mib), &buf, &len, NULL, 0) == 0) - got_machineid = bootid_parse_uuid(&bin, buf, len); - } -#endif /* CTL_HW && HW_UUID */ - -#if defined(CTL_KERN) && defined(KERN_HOSTUUID) - if (!got_machineid) { - static const int mib[] = {CTL_KERN, KERN_HOSTUUID}; - char buf[42]; - size_t len = sizeof(buf); - if (sysctl( -#ifdef SYSCTL_LEGACY_NONCONST_MIB - (int *) -#endif - mib, - ARRAY_LENGTH(mib), &buf, &len, NULL, 0) == 0) - got_machineid = bootid_parse_uuid(&bin, buf, len); - } -#endif /* CTL_KERN && KERN_HOSTUUID */ - -#if defined(__NetBSD__) - if (!got_machineid) { - char buf[42]; - size_t len = sizeof(buf); - if (sysctlbyname("machdep.dmi.system-uuid", buf, &len, NULL, 0) == 0) - got_machineid = bootid_parse_uuid(&bin, buf, len); - } -#endif /* __NetBSD__ */ - -#if _XOPEN_SOURCE_EXTENDED - if (!got_machineid) { - const int hostid = gethostid(); - if (hostid > 0) { - bootid_collect(&bin, &hostid, sizeof(hostid)); - got_machineid = true; - } - } -#endif /* _XOPEN_SOURCE_EXTENDED */ - - if (!got_machineid) { - lack: - bin.x = bin.y = 0; - return bin; - } - - /*--------------------------------------------------------------------------*/ - -#if defined(CTL_KERN) && defined(KERN_BOOTTIME) - if (!got_boottime) { - static const int mib[] = {CTL_KERN, KERN_BOOTTIME}; - struct timeval boottime; - size_t len = sizeof(boottime); - if (sysctl( -#ifdef SYSCTL_LEGACY_NONCONST_MIB - (int *) -#endif - mib, - ARRAY_LENGTH(mib), &boottime, &len, NULL, 0) == 0 && - len == sizeof(boottime) && boottime.tv_sec) { - bootid_collect(&bin, &boottime, len); - got_boottime = true; - } - } -#endif /* CTL_KERN && KERN_BOOTTIME */ - -#if defined(__sun) || defined(__SVR4) || defined(__svr4__) - if (!got_boottime) { - kstat_ctl_t *kc = kstat_open(); - if (kc) { - kstat_t *kp = kstat_lookup(kc, "unix", 0, "system_misc"); - if (kp && kstat_read(kc, kp, 0) != -1) { - kstat_named_t *kn = (kstat_named_t *)kstat_data_lookup(kp, "boot_time"); - if (kn) { - switch (kn->data_type) { - case KSTAT_DATA_INT32: - case KSTAT_DATA_UINT32: - bootid_collect(&bin, &kn->value, sizeof(int32_t)); - got_boottime = true; - case KSTAT_DATA_INT64: - case KSTAT_DATA_UINT64: - bootid_collect(&bin, &kn->value, sizeof(int64_t)); - got_boottime = true; - } - } - } - kstat_close(kc); - } - } -#endif /* SunOS / Solaris */ - -#if _XOPEN_SOURCE_EXTENDED && defined(BOOT_TIME) - if (!got_boottime) { - setutxent(); - const struct utmpx id = {.ut_type = BOOT_TIME}; - const struct utmpx *entry = getutxid(&id); - if (entry) { - bootid_collect(&bin, entry, sizeof(*entry)); - got_boottime = true; - while (unlikely((entry = getutxid(&id)) != nullptr)) { - /* have multiple reboot records, assuming we can distinguish next - * bootsession even if RTC is wrong or absent */ - bootid_collect(&bin, entry, sizeof(*entry)); - got_bootseq = true; - } - } - endutxent(); - } -#endif /* _XOPEN_SOURCE_EXTENDED && BOOT_TIME */ - - if (!got_bootseq) { - if (!got_boottime || !MDBX_TRUST_RTC) - goto lack; - -#if defined(_WIN32) || defined(_WIN64) - FILETIME now; - GetSystemTimeAsFileTime(&now); - if (0x1CCCCCC > now.dwHighDateTime) -#else - struct timespec mono, real; - if (clock_gettime(CLOCK_MONOTONIC, &mono) || - clock_gettime(CLOCK_REALTIME, &real) || - /* wrong time, RTC is mad or absent */ - 1555555555l > real.tv_sec || - /* seems no adjustment by RTC/NTP, i.e. a fake time */ - real.tv_sec < mono.tv_sec || 1234567890l > real.tv_sec - mono.tv_sec || - (real.tv_sec - mono.tv_sec) % 900u == 0) -#endif - goto lack; - } - - return bin; -} diff --git a/libs/libmdbx/src/src/elements/osal.h b/libs/libmdbx/src/src/elements/osal.h deleted file mode 100644 index 6e423e98dd..0000000000 --- a/libs/libmdbx/src/src/elements/osal.h +++ /dev/null @@ -1,927 +0,0 @@ -/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . - */ - -#pragma once - -/*----------------------------------------------------------------------------*/ -/* Microsoft compiler generates a lot of warning for self includes... */ - -#ifdef _MSC_VER -#pragma warning(push, 1) -#pragma warning(disable : 4548) /* expression before comma has no effect; \ - expected expression with side - effect */ -#pragma warning(disable : 4530) /* C++ exception handler used, but unwind \ - * semantics are not enabled. Specify /EHsc */ -#pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \ - * mode specified; termination on exception is \ - * not guaranteed. Specify /EHsc */ -#endif /* _MSC_VER (warnings) */ - -#if defined(_WIN32) || defined(_WIN64) -#if !defined(_CRT_SECURE_NO_WARNINGS) -#define _CRT_SECURE_NO_WARNINGS -#endif -#if !defined(_NO_CRT_STDIO_INLINE) && MDBX_BUILD_SHARED_LIBRARY && \ - !defined(MDBX_TOOLS) -#define _NO_CRT_STDIO_INLINE -#endif -#elif !defined(_POSIX_C_SOURCE) -#define _POSIX_C_SOURCE 200809L -#endif /* Windows */ - -#ifdef __cplusplus -extern "C" { -#endif - -/*----------------------------------------------------------------------------*/ -/* C99 includes */ -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -/* C11 stdalign.h */ -#if __has_include() -#include -#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L -#define alignas(N) _Alignas(N) -#elif defined(_MSC_VER) -#define alignas(N) __declspec(align(N)) -#elif __has_attribute(__aligned__) || defined(__GNUC__) -#define alignas(N) __attribute__((__aligned__(N))) -#else -#error "FIXME: Required _alignas() or equivalent." -#endif - -/*----------------------------------------------------------------------------*/ -/* Systems includes */ - -#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ - defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \ - defined(__APPLE__) || defined(__MACH__) -#include -#include -#include -#include -#if defined(__FreeBSD__) || defined(__DragonFly__) -#include -#elif defined(__OpenBSD__) || defined(__NetBSD__) -#include -#else -#define SYSCTL_LEGACY_NONCONST_MIB -#endif -#include -#else -#include -#if !(defined(__sun) || defined(__SVR4) || defined(__svr4__) || \ - defined(_WIN32) || defined(_WIN64)) -#include -#endif /* !Solaris */ -#endif /* !xBSD */ - -#if defined(__FreeBSD__) || __has_include() -#include -#endif - -#if defined(__APPLE__) || defined(__MACH__) || __has_include() -#include -#endif /* MacOS */ - -#if defined(__MACH__) -#include -#include -#include -#include -#undef P_DIRTY -#endif - -#if defined(__linux__) || defined(__gnu_linux__) -#include -#include -#include -#endif /* Linux */ - -#ifndef _XOPEN_SOURCE -#define _XOPEN_SOURCE 0 -#endif - -#ifndef _XOPEN_SOURCE_EXTENDED -#define _XOPEN_SOURCE_EXTENDED 0 -#else -#include -#endif /* _XOPEN_SOURCE_EXTENDED */ - -#if defined(__sun) || defined(__SVR4) || defined(__svr4__) -#include -#include -/* On Solaris, it's easier to add a missing prototype rather than find a - * combination of #defines that break nothing. */ -__extern_C key_t ftok(const char *, int); -#endif /* SunOS/Solaris */ - -#if defined(_WIN32) || defined(_WIN64) -#ifndef WIN32_LEAN_AND_MEAN -#define WIN32_LEAN_AND_MEAN -#endif -#include -#include -#include -#include -#define HAVE_SYS_STAT_H -#define HAVE_SYS_TYPES_H -typedef HANDLE mdbx_thread_t; -typedef unsigned mdbx_thread_key_t; -#define MDBX_OSAL_SECTION HANDLE -#define MAP_FAILED NULL -#define HIGH_DWORD(v) ((DWORD)((sizeof(v) > 4) ? ((uint64_t)(v) >> 32) : 0)) -#define THREAD_CALL WINAPI -#define THREAD_RESULT DWORD -typedef struct { - HANDLE mutex; - HANDLE event; -} mdbx_condmutex_t; -typedef CRITICAL_SECTION mdbx_fastmutex_t; - -#if MDBX_AVOID_CRT -#ifndef mdbx_malloc -static inline void *mdbx_malloc(size_t bytes) { - return LocalAlloc(LMEM_FIXED, bytes); -} -#endif /* mdbx_malloc */ - -#ifndef mdbx_calloc -static inline void *mdbx_calloc(size_t nelem, size_t size) { - return LocalAlloc(LMEM_FIXED | LMEM_ZEROINIT, nelem * size); -} -#endif /* mdbx_calloc */ - -#ifndef mdbx_realloc -static inline void *mdbx_realloc(void *ptr, size_t bytes) { - return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE); -} -#endif /* mdbx_realloc */ - -#ifndef mdbx_free -#define mdbx_free LocalFree -#endif /* mdbx_free */ -#else -#define mdbx_malloc malloc -#define mdbx_calloc calloc -#define mdbx_realloc realloc -#define mdbx_free free -#define mdbx_strdup _strdup -#endif /* MDBX_AVOID_CRT */ - -#ifndef snprintf -#define snprintf _snprintf /* ntdll */ -#endif - -#ifndef vsnprintf -#define vsnprintf _vsnprintf /* ntdll */ -#endif - -#else /*----------------------------------------------------------------------*/ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -typedef pthread_t mdbx_thread_t; -typedef pthread_key_t mdbx_thread_key_t; -#define INVALID_HANDLE_VALUE (-1) -#define THREAD_CALL -#define THREAD_RESULT void * -typedef struct { - pthread_mutex_t mutex; - pthread_cond_t cond; -} mdbx_condmutex_t; -typedef pthread_mutex_t mdbx_fastmutex_t; -#define mdbx_malloc malloc -#define mdbx_calloc calloc -#define mdbx_realloc realloc -#define mdbx_free free -#define mdbx_strdup strdup -#endif /* Platform */ - -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) -/* malloc_usable_size() already provided */ -#elif defined(__APPLE__) -#define malloc_usable_size(ptr) malloc_size(ptr) -#elif defined(_MSC_VER) && !MDBX_AVOID_CRT -#define malloc_usable_size(ptr) _msize(ptr) -#endif /* malloc_usable_size */ - -/* *INDENT-OFF* */ -/* clang-format off */ -#if defined(HAVE_SYS_STAT_H) || __has_include() -#include -#endif -#if defined(HAVE_SYS_TYPES_H) || __has_include() -#include -#endif -#if defined(HAVE_SYS_FILE_H) || __has_include() -#include -#endif -/* *INDENT-ON* */ -/* clang-format on */ - -#ifndef SSIZE_MAX -#define SSIZE_MAX INTPTR_MAX -#endif - -#if !defined(MADV_DODUMP) && defined(MADV_CORE) -#define MADV_DODUMP MADV_CORE -#endif /* MADV_CORE -> MADV_DODUMP */ - -#if !defined(MADV_DONTDUMP) && defined(MADV_NOCORE) -#define MADV_DONTDUMP MADV_NOCORE -#endif /* MADV_NOCORE -> MADV_DONTDUMP */ - -#if defined(i386) || defined(__386) || defined(__i386) || defined(__i386__) || \ - defined(i486) || defined(__i486) || defined(__i486__) || \ - defined(i586) | defined(__i586) || defined(__i586__) || defined(i686) || \ - defined(__i686) || defined(__i686__) || defined(_M_IX86) || \ - defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) || \ - defined(__INTEL__) || defined(__x86_64) || defined(__x86_64__) || \ - defined(__amd64__) || defined(__amd64) || defined(_M_X64) || \ - defined(_M_AMD64) || defined(__IA32__) || defined(__INTEL__) -#ifndef __ia32__ -/* LY: define neutral __ia32__ for x86 and x86-64 archs */ -#define __ia32__ 1 -#endif /* __ia32__ */ -#if !defined(__amd64__) && (defined(__x86_64) || defined(__x86_64__) || \ - defined(__amd64) || defined(_M_X64)) -/* LY: define trusty __amd64__ for all AMD64/x86-64 arch */ -#define __amd64__ 1 -#endif /* __amd64__ */ -#endif /* all x86 */ - -#if (-6 & 5) || CHAR_BIT != 8 || UINT_MAX < 0xffffffff || ULONG_MAX % 0xFFFF -#error \ - "Sanity checking failed: Two's complement, reasonably sized integer types" -#endif - -#if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul -#define MDBX_WORDBITS 64 -#else -#define MDBX_WORDBITS 32 -#endif /* MDBX_WORDBITS */ - -/*----------------------------------------------------------------------------*/ -/* Compiler's includes for builtins/intrinsics */ - -#if defined(_MSC_VER) || defined(__INTEL_COMPILER) -#include -#elif __GNUC_PREREQ(4, 4) || defined(__clang__) -#if defined(__ia32__) || defined(__e2k__) -#include -#endif /* __ia32__ */ -#if defined(__ia32__) -#include -#endif /* __ia32__ */ -#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) -#include -#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ - (defined(HP_IA64) || defined(__ia64)) -#include -#elif defined(__IBMC__) && defined(__powerpc) -#include -#elif defined(_AIX) -#include -#include -#elif (defined(__osf__) && defined(__DECC)) || defined(__alpha) -#include -#include -#elif defined(__MWERKS__) -/* CodeWarrior - troubles ? */ -#pragma gcc_extensions -#elif defined(__SNC__) -/* Sony PS3 - troubles ? */ -#elif defined(__hppa__) || defined(__hppa) -#include -#else -#error Unsupported C compiler, please use GNU C 4.4 or newer -#endif /* Compiler */ - -/*----------------------------------------------------------------------------*/ -/* Byteorder */ - -#if !defined(__BYTE_ORDER__) || !defined(__ORDER_LITTLE_ENDIAN__) || \ - !defined(__ORDER_BIG_ENDIAN__) - -/* *INDENT-OFF* */ -/* clang-format off */ -#if defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__ANDROID__) || \ - defined(HAVE_ENDIAN_H) || __has_include() -#include -#elif defined(__APPLE__) || defined(__MACH__) || defined(__OpenBSD__) || \ - defined(HAVE_MACHINE_ENDIAN_H) || __has_include() -#include -#elif defined(HAVE_SYS_ISA_DEFS_H) || __has_include() -#include -#elif (defined(HAVE_SYS_TYPES_H) && defined(HAVE_SYS_ENDIAN_H)) || \ - (__has_include() && __has_include()) -#include -#include -#elif defined(__bsdi__) || defined(__DragonFly__) || defined(__FreeBSD__) || \ - defined(__NetBSD__) || \ - defined(HAVE_SYS_PARAM_H) || __has_include() -#include -#endif /* OS */ -/* *INDENT-ON* */ -/* clang-format on */ - -#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) -#define __ORDER_LITTLE_ENDIAN__ __LITTLE_ENDIAN -#define __ORDER_BIG_ENDIAN__ __BIG_ENDIAN -#define __BYTE_ORDER__ __BYTE_ORDER -#elif defined(_BYTE_ORDER) && defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN) -#define __ORDER_LITTLE_ENDIAN__ _LITTLE_ENDIAN -#define __ORDER_BIG_ENDIAN__ _BIG_ENDIAN -#define __BYTE_ORDER__ _BYTE_ORDER -#else -#define __ORDER_LITTLE_ENDIAN__ 1234 -#define __ORDER_BIG_ENDIAN__ 4321 - -#if defined(__LITTLE_ENDIAN__) || \ - (defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \ - defined(__ARMEL__) || defined(__THUMBEL__) || defined(__AARCH64EL__) || \ - defined(__MIPSEL__) || defined(_MIPSEL) || defined(__MIPSEL) || \ - defined(_M_ARM) || defined(_M_ARM64) || defined(__e2k__) || \ - defined(__elbrus_4c__) || defined(__elbrus_8c__) || defined(__bfin__) || \ - defined(__BFIN__) || defined(__ia64__) || defined(_IA64) || \ - defined(__IA64__) || defined(__ia64) || defined(_M_IA64) || \ - defined(__itanium__) || defined(__ia32__) || defined(__CYGWIN__) || \ - defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) || \ - defined(__WINDOWS__) -#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__ - -#elif defined(__BIG_ENDIAN__) || \ - (defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || \ - defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \ - defined(__MIPSEB__) || defined(_MIPSEB) || defined(__MIPSEB) || \ - defined(__m68k__) || defined(M68000) || defined(__hppa__) || \ - defined(__hppa) || defined(__HPPA__) || defined(__sparc__) || \ - defined(__sparc) || defined(__370__) || defined(__THW_370__) || \ - defined(__s390__) || defined(__s390x__) || defined(__SYSC_ZARCH__) -#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__ - -#else -#error __BYTE_ORDER__ should be defined. -#endif /* Arch */ - -#endif -#endif /* __BYTE_ORDER__ || __ORDER_LITTLE_ENDIAN__ || __ORDER_BIG_ENDIAN__ */ - -/*----------------------------------------------------------------------------*/ -/* Memory/Compiler barriers, cache coherence */ - -#if __has_include() -#include -#elif defined(__mips) || defined(__mips__) || defined(__mips64) || \ - defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ - defined(__MWERKS__) || defined(__sgi) -/* MIPS should have explicit cache control */ -#include -#endif - -static __maybe_unused __inline void mdbx_compiler_barrier(void) { -#if defined(__clang__) || defined(__GNUC__) - __asm__ __volatile__("" ::: "memory"); -#elif defined(_MSC_VER) - _ReadWriteBarrier(); -#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ - __memory_barrier(); - if (type > MDBX_BARRIER_COMPILER) -#if defined(__ia64__) || defined(__ia64) || defined(_M_IA64) - __mf(); -#elif defined(__i386__) || defined(__x86_64__) - _mm_mfence(); -#else -#error "Unknown target for Intel Compiler, please report to us." -#endif -#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) - __compiler_barrier(); -#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ - (defined(HP_IA64) || defined(__ia64)) - _Asm_sched_fence(/* LY: no-arg meaning 'all expect ALU', e.g. 0x3D3D */); -#elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \ - defined(__ppc64__) || defined(__powerpc64__) - __fence(); -#else -#error "Could not guess the kind of compiler, please report to us." -#endif -} - -static __maybe_unused __inline void mdbx_memory_barrier(void) { -#if __has_extension(c_atomic) || __has_extension(cxx_atomic) - __c11_atomic_thread_fence(__ATOMIC_SEQ_CST); -#elif defined(__ATOMIC_SEQ_CST) - __atomic_thread_fence(__ATOMIC_SEQ_CST); -#elif defined(__clang__) || defined(__GNUC__) - __sync_synchronize(); -#elif defined(_MSC_VER) - MemoryBarrier(); -#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ -#if defined(__ia64__) || defined(__ia64) || defined(_M_IA64) - __mf(); -#elif defined(__i386__) || defined(__x86_64__) - _mm_mfence(); -#else -#error "Unknown target for Intel Compiler, please report to us." -#endif -#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) - __machine_rw_barrier(); -#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ - (defined(HP_IA64) || defined(__ia64)) - _Asm_mf(); -#elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \ - defined(__ppc64__) || defined(__powerpc64__) - __lwsync(); -#else -#error "Could not guess the kind of compiler, please report to us." -#endif -} - -/*----------------------------------------------------------------------------*/ -/* libc compatibility stuff */ - -#if (!defined(__GLIBC__) && __GLIBC_PREREQ(2, 1)) && \ - (defined(_GNU_SOURCE) || defined(_BSD_SOURCE)) -#define mdbx_asprintf asprintf -#define mdbx_vasprintf vasprintf -#else -MDBX_INTERNAL_FUNC __printf_args(2, 3) int __maybe_unused - mdbx_asprintf(char **strp, const char *fmt, ...); -MDBX_INTERNAL_FUNC int mdbx_vasprintf(char **strp, const char *fmt, va_list ap); -#endif - -/*----------------------------------------------------------------------------*/ -/* OS abstraction layer stuff */ - -/* max bytes to write in one call */ -#if defined(_WIN32) || defined(_WIN64) -#define MAX_WRITE UINT32_C(0x01000000) -#else -#define MAX_WRITE UINT32_C(0x3fff0000) -#endif - -#if defined(__linux__) || defined(__gnu_linux__) -MDBX_INTERNAL_VAR uint32_t mdbx_linux_kernel_version; -#endif /* Linux */ - -/* Get the size of a memory page for the system. - * This is the basic size that the platform's memory manager uses, and is - * fundamental to the use of memory-mapped files. */ -static __maybe_unused __inline size_t mdbx_syspagesize(void) { -#if defined(_WIN32) || defined(_WIN64) - SYSTEM_INFO si; - GetSystemInfo(&si); - return si.dwPageSize; -#else - return sysconf(_SC_PAGE_SIZE); -#endif -} - -#ifndef mdbx_strdup -LIBMDBX_API char *mdbx_strdup(const char *str); -#endif - -static __maybe_unused __inline int mdbx_get_errno(void) { -#if defined(_WIN32) || defined(_WIN64) - DWORD rc = GetLastError(); -#else - int rc = errno; -#endif - return rc; -} - -#ifndef mdbx_memalign_alloc -MDBX_INTERNAL_FUNC int mdbx_memalign_alloc(size_t alignment, size_t bytes, - void **result); -#endif -#ifndef mdbx_memalign_free -MDBX_INTERNAL_FUNC void mdbx_memalign_free(void *ptr); -#endif - -MDBX_INTERNAL_FUNC int mdbx_condmutex_init(mdbx_condmutex_t *condmutex); -MDBX_INTERNAL_FUNC int mdbx_condmutex_lock(mdbx_condmutex_t *condmutex); -MDBX_INTERNAL_FUNC int mdbx_condmutex_unlock(mdbx_condmutex_t *condmutex); -MDBX_INTERNAL_FUNC int mdbx_condmutex_signal(mdbx_condmutex_t *condmutex); -MDBX_INTERNAL_FUNC int mdbx_condmutex_wait(mdbx_condmutex_t *condmutex); -MDBX_INTERNAL_FUNC int mdbx_condmutex_destroy(mdbx_condmutex_t *condmutex); - -MDBX_INTERNAL_FUNC int mdbx_fastmutex_init(mdbx_fastmutex_t *fastmutex); -MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex); -MDBX_INTERNAL_FUNC int mdbx_fastmutex_release(mdbx_fastmutex_t *fastmutex); -MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex); - -MDBX_INTERNAL_FUNC int mdbx_pwritev(mdbx_filehandle_t fd, struct iovec *iov, - int iovcnt, uint64_t offset, - size_t expected_written); -MDBX_INTERNAL_FUNC int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t count, - uint64_t offset); -MDBX_INTERNAL_FUNC int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, - size_t count, uint64_t offset); -MDBX_INTERNAL_FUNC int mdbx_write(mdbx_filehandle_t fd, const void *buf, - size_t count); - -MDBX_INTERNAL_FUNC int -mdbx_thread_create(mdbx_thread_t *thread, - THREAD_RESULT(THREAD_CALL *start_routine)(void *), - void *arg); -MDBX_INTERNAL_FUNC int mdbx_thread_join(mdbx_thread_t thread); - -enum mdbx_syncmode_bits { - MDBX_SYNC_DATA = 1, - MDBX_SYNC_SIZE = 2, - MDBX_SYNC_IODQ = 4 -}; - -MDBX_INTERNAL_FUNC int mdbx_filesync(mdbx_filehandle_t fd, - const enum mdbx_syncmode_bits mode_bits); -MDBX_INTERNAL_FUNC int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length); -MDBX_INTERNAL_FUNC int mdbx_fseek(mdbx_filehandle_t fd, uint64_t pos); -MDBX_INTERNAL_FUNC int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length); - -enum mdbx_openfile_purpose { - MDBX_OPEN_DXB_READ = 0, - MDBX_OPEN_DXB_LAZY = 1, - MDBX_OPEN_DXB_DSYNC = 2, - MDBX_OPEN_LCK = 3, - MDBX_OPEN_COPY = 4 -}; - -MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose, - const MDBX_env *env, const char *pathname, - mdbx_filehandle_t *fd, - mode_t unix_mode_bits); -MDBX_INTERNAL_FUNC int mdbx_closefile(mdbx_filehandle_t fd); -MDBX_INTERNAL_FUNC int mdbx_removefile(const char *pathname); -MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd); - -typedef struct mdbx_mmap_param { - union { - void *address; - uint8_t *dxb; - struct MDBX_lockinfo *lck; - }; - mdbx_filehandle_t fd; - size_t limit; /* mapping length, but NOT a size of file nor DB */ - size_t current; /* mapped region size, i.e. the size of file and DB */ -#if defined(_WIN32) || defined(_WIN64) - uint64_t filesize /* in-process cache of a file size. */; -#endif -#ifdef MDBX_OSAL_SECTION - MDBX_OSAL_SECTION section; -#endif -} mdbx_mmap_t; - -#define MMAP_OPTION_TRUNCATE 1 -#define MMAP_OPTION_SEMAPHORE 2 -MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map, - const size_t must, const size_t limit, - const unsigned options); -MDBX_INTERNAL_FUNC int mdbx_munmap(mdbx_mmap_t *map); -MDBX_INTERNAL_FUNC int mdbx_mresize(int flags, mdbx_mmap_t *map, size_t current, - size_t wanna); -#if defined(_WIN32) || defined(_WIN64) -typedef struct { - unsigned limit, count; - HANDLE handles[31]; -} mdbx_handle_array_t; -MDBX_INTERNAL_FUNC int -mdbx_suspend_threads_before_remap(MDBX_env *env, mdbx_handle_array_t **array); -MDBX_INTERNAL_FUNC int -mdbx_resume_threads_after_remap(mdbx_handle_array_t *array); -#endif /* Windows */ -MDBX_INTERNAL_FUNC int mdbx_msync(mdbx_mmap_t *map, size_t offset, - size_t length, int async); -MDBX_INTERNAL_FUNC int mdbx_check_fs_rdonly(mdbx_filehandle_t handle, - const char *pathname, int err); - -static __maybe_unused __inline uint32_t mdbx_getpid(void) { - STATIC_ASSERT(sizeof(mdbx_pid_t) <= sizeof(uint32_t)); -#if defined(_WIN32) || defined(_WIN64) - return GetCurrentProcessId(); -#else - return getpid(); -#endif -} - -static __maybe_unused __inline size_t mdbx_thread_self(void) { - STATIC_ASSERT(sizeof(mdbx_tid_t) <= sizeof(size_t)); -#if defined(_WIN32) || defined(_WIN64) - return GetCurrentThreadId(); -#else - return (size_t)pthread_self(); -#endif -} - -MDBX_INTERNAL_FUNC void __maybe_unused mdbx_osal_jitter(bool tiny); -MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void); -MDBX_INTERNAL_FUNC uint64_t -mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16); -MDBX_INTERNAL_FUNC uint32_t mdbx_osal_monotime_to_16dot16(uint64_t monotime); - -typedef union bin128 { - __anonymous_struct_extension__ struct { uint64_t x, y; }; - __anonymous_struct_extension__ struct { uint32_t a, b, c, d; }; -} bin128_t; - -MDBX_INTERNAL_FUNC bin128_t mdbx_osal_bootid(void); -/*----------------------------------------------------------------------------*/ -/* lck stuff */ - -/// \brief Initialization of synchronization primitives linked with MDBX_env -/// instance both in LCK-file and within the current process. -/// \param -/// global_uniqueness_flag = true - denotes that there are no other processes -/// working with DB and LCK-file. Thus the function MUST initialize -/// shared synchronization objects in memory-mapped LCK-file. -/// global_uniqueness_flag = false - denotes that at least one process is -/// already working with DB and LCK-file, including the case when DB -/// has already been opened in the current process. Thus the function -/// MUST NOT initialize shared synchronization objects in memory-mapped -/// LCK-file that are already in use. -/// \return Error code or zero on success. -MDBX_INTERNAL_FUNC int mdbx_lck_init(MDBX_env *env, - MDBX_env *inprocess_neighbor, - int global_uniqueness_flag); - -/// \brief Disconnects from shared interprocess objects and destructs -/// synchronization objects linked with MDBX_env instance -/// within the current process. -/// \param -/// inprocess_neighbor = NULL - if the current process does not have other -/// instances of MDBX_env linked with the DB being closed. -/// Thus the function MUST check for other processes working with DB or -/// LCK-file, and keep or destroy shared synchronization objects in -/// memory-mapped LCK-file depending on the result. -/// inprocess_neighbor = not-NULL - pointer to another instance of MDBX_env -/// (anyone of there is several) working with DB or LCK-file within the -/// current process. Thus the function MUST NOT try to acquire exclusive -/// lock and/or try to destruct shared synchronization objects linked with -/// DB or LCK-file. Moreover, the implementation MUST ensure correct work -/// of other instances of MDBX_env within the current process, e.g. -/// restore POSIX-fcntl locks after the closing of file descriptors. -/// \return Error code (MDBX_PANIC) or zero on success. -MDBX_INTERNAL_FUNC int mdbx_lck_destroy(MDBX_env *env, - MDBX_env *inprocess_neighbor); - -/// \brief Connects to shared interprocess locking objects and tries to acquire -/// the maximum lock level (shared if exclusive is not available) -/// Depending on implementation or/and platform (Windows) this function may -/// acquire the non-OS super-level lock (e.g. for shared synchronization -/// objects initialization), which will be downgraded to OS-exclusive or -/// shared via explicit calling of mdbx_lck_downgrade(). -/// \return -/// MDBX_RESULT_TRUE (-1) - if an exclusive lock was acquired and thus -/// the current process is the first and only after the last use of DB. -/// MDBX_RESULT_FALSE (0) - if a shared lock was acquired and thus -/// DB has already been opened and now is used by other processes. -/// Otherwise (not 0 and not -1) - error code. -MDBX_INTERNAL_FUNC int mdbx_lck_seize(MDBX_env *env); - -/// \brief Downgrades the level of initially acquired lock to -/// operational level specified by agrument. The reson for such downgrade: -/// - unblocking of other processes that are waiting for access, i.e. -/// if (env->me_flags & MDBX_EXCLUSIVE) != 0, then other processes -/// should be made aware that access is unavailable rather than -/// wait for it. -/// - freeing locks that interfere file operation (expecially for Windows) -/// (env->me_flags & MDBX_EXCLUSIVE) == 0 - downgrade to shared lock. -/// (env->me_flags & MDBX_EXCLUSIVE) != 0 - downgrade to exclusive -/// operational lock. -/// \return Error code or zero on success -MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env); - -/// \brief Locks LCK-file or/and table of readers for (de)registering. -/// \return Error code or zero on success -MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env); - -/// \brief Unlocks LCK-file or/and table of readers after (de)registering. -MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env); - -/// \brief Acquires lock for DB change (on writing transaction start) -/// Reading transactions will not be blocked. -/// Declared as LIBMDBX_API because it is used in mdbx_chk. -/// \return Error code or zero on success -LIBMDBX_API int mdbx_txn_lock(MDBX_env *env, bool dont_wait); - -/// \brief Releases lock once DB changes is made (after writing transaction -/// has finished). -/// Declared as LIBMDBX_API because it is used in mdbx_chk. -LIBMDBX_API void mdbx_txn_unlock(MDBX_env *env); - -/// \brief Sets alive-flag of reader presence (indicative lock) for PID of -/// the current process. The function does no more than needed for -/// the correct working of mdbx_rpid_check() in other processes. -/// \return Error code or zero on success -MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env); - -/// \brief Resets alive-flag of reader presence (indicative lock) -/// for PID of the current process. The function does no more than needed -/// for the correct working of mdbx_rpid_check() in other processes. -/// \return Error code or zero on success -MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env); - -/// \brief Checks for reading process status with the given pid with help of -/// alive-flag of presence (indicative lock) or using another way. -/// \return -/// MDBX_RESULT_TRUE (-1) - if the reader process with the given PID is alive -/// and working with DB (indicative lock is present). -/// MDBX_RESULT_FALSE (0) - if the reader process with the given PID is absent -/// or not working with DB (indicative lock is not present). -/// Otherwise (not 0 and not -1) - error code. -MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid); - -#if defined(_WIN32) || defined(_WIN64) - -typedef union MDBX_srwlock { - struct { - long volatile readerCount; - long volatile writerCount; - }; - RTL_SRWLOCK native; -} MDBX_srwlock; - -typedef void(WINAPI *MDBX_srwlock_function)(MDBX_srwlock *); -MDBX_INTERNAL_VAR MDBX_srwlock_function mdbx_srwlock_Init, - mdbx_srwlock_AcquireShared, mdbx_srwlock_ReleaseShared, - mdbx_srwlock_AcquireExclusive, mdbx_srwlock_ReleaseExclusive; - -typedef BOOL(WINAPI *MDBX_GetFileInformationByHandleEx)( - _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass, - _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize); -MDBX_INTERNAL_VAR MDBX_GetFileInformationByHandleEx - mdbx_GetFileInformationByHandleEx; - -typedef BOOL(WINAPI *MDBX_GetVolumeInformationByHandleW)( - _In_ HANDLE hFile, _Out_opt_ LPWSTR lpVolumeNameBuffer, - _In_ DWORD nVolumeNameSize, _Out_opt_ LPDWORD lpVolumeSerialNumber, - _Out_opt_ LPDWORD lpMaximumComponentLength, - _Out_opt_ LPDWORD lpFileSystemFlags, - _Out_opt_ LPWSTR lpFileSystemNameBuffer, _In_ DWORD nFileSystemNameSize); -MDBX_INTERNAL_VAR MDBX_GetVolumeInformationByHandleW - mdbx_GetVolumeInformationByHandleW; - -typedef DWORD(WINAPI *MDBX_GetFinalPathNameByHandleW)(_In_ HANDLE hFile, - _Out_ LPWSTR lpszFilePath, - _In_ DWORD cchFilePath, - _In_ DWORD dwFlags); -MDBX_INTERNAL_VAR MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW; - -typedef BOOL(WINAPI *MDBX_SetFileInformationByHandle)( - _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass, - _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize); -MDBX_INTERNAL_VAR MDBX_SetFileInformationByHandle - mdbx_SetFileInformationByHandle; - -typedef NTSTATUS(NTAPI *MDBX_NtFsControlFile)( - IN HANDLE FileHandle, IN OUT HANDLE Event, - IN OUT PVOID /* PIO_APC_ROUTINE */ ApcRoutine, IN OUT PVOID ApcContext, - OUT PIO_STATUS_BLOCK IoStatusBlock, IN ULONG FsControlCode, - IN OUT PVOID InputBuffer, IN ULONG InputBufferLength, - OUT OPTIONAL PVOID OutputBuffer, IN ULONG OutputBufferLength); -MDBX_INTERNAL_VAR MDBX_NtFsControlFile mdbx_NtFsControlFile; - -typedef uint64_t(WINAPI *MDBX_GetTickCount64)(void); -MDBX_INTERNAL_VAR MDBX_GetTickCount64 mdbx_GetTickCount64; - -#if !defined(_WIN32_WINNT_WIN8) || _WIN32_WINNT < _WIN32_WINNT_WIN8 -typedef struct _WIN32_MEMORY_RANGE_ENTRY { - PVOID VirtualAddress; - SIZE_T NumberOfBytes; -} WIN32_MEMORY_RANGE_ENTRY, *PWIN32_MEMORY_RANGE_ENTRY; -#endif /* Windows 8.x */ - -typedef BOOL(WINAPI *MDBX_PrefetchVirtualMemory)( - HANDLE hProcess, ULONG_PTR NumberOfEntries, - PWIN32_MEMORY_RANGE_ENTRY VirtualAddresses, ULONG Flags); -MDBX_INTERNAL_VAR MDBX_PrefetchVirtualMemory mdbx_PrefetchVirtualMemory; - -#if 0 /* LY: unused for now */ -#if !defined(_WIN32_WINNT_WIN81) || _WIN32_WINNT < _WIN32_WINNT_WIN81 -typedef enum OFFER_PRIORITY { - VmOfferPriorityVeryLow = 1, - VmOfferPriorityLow, - VmOfferPriorityBelowNormal, - VmOfferPriorityNormal -} OFFER_PRIORITY; -#endif /* Windows 8.1 */ - -typedef DWORD(WINAPI *MDBX_DiscardVirtualMemory)(PVOID VirtualAddress, - SIZE_T Size); -MDBX_INTERNAL_VAR MDBX_DiscardVirtualMemory mdbx_DiscardVirtualMemory; - -typedef DWORD(WINAPI *MDBX_ReclaimVirtualMemory)(PVOID VirtualAddress, - SIZE_T Size); -MDBX_INTERNAL_VAR MDBX_ReclaimVirtualMemory mdbx_ReclaimVirtualMemory; - -typedef DWORD(WINAPI *MDBX_OfferVirtualMemory( - PVOID VirtualAddress, - SIZE_T Size, - OFFER_PRIORITY Priority -); -MDBX_INTERNAL_VAR MDBX_OfferVirtualMemory mdbx_OfferVirtualMemory; -#endif /* unused for now */ - -typedef enum _SECTION_INHERIT { ViewShare = 1, ViewUnmap = 2 } SECTION_INHERIT; - -typedef NTSTATUS(NTAPI *MDBX_NtExtendSection)(IN HANDLE SectionHandle, - IN PLARGE_INTEGER NewSectionSize); -MDBX_INTERNAL_VAR MDBX_NtExtendSection mdbx_NtExtendSection; - -static __inline bool mdbx_RunningUnderWine(void) { - return !mdbx_NtExtendSection; -} - -#endif /* Windows */ - -/*----------------------------------------------------------------------------*/ -/* Atomics */ - -#if !defined(__cplusplus) && (__STDC_VERSION__ >= 201112L) && \ - !defined(__STDC_NO_ATOMICS__) && \ - (__GNUC_PREREQ(4, 9) || __CLANG_PREREQ(3, 8) || \ - !(defined(__GNUC__) || defined(__clang__))) -#include -#elif defined(__GNUC__) || defined(__clang__) -/* LY: nothing required */ -#elif defined(_MSC_VER) -#pragma warning(disable : 4163) /* 'xyz': not available as an intrinsic */ -#pragma warning(disable : 4133) /* 'function': incompatible types - from \ - 'size_t' to 'LONGLONG' */ -#pragma warning(disable : 4244) /* 'return': conversion from 'LONGLONG' to \ - 'std::size_t', possible loss of data */ -#pragma warning(disable : 4267) /* 'function': conversion from 'size_t' to \ - 'long', possible loss of data */ -#pragma intrinsic(_InterlockedExchangeAdd, _InterlockedCompareExchange) -#pragma intrinsic(_InterlockedExchangeAdd64, _InterlockedCompareExchange64) -#elif defined(__APPLE__) -#include -#else -#error FIXME atomic-ops -#endif - -/*----------------------------------------------------------------------------*/ - -#if defined(_MSC_VER) && _MSC_VER >= 1900 -/* LY: MSVC 2015/2017/2019 has buggy/inconsistent PRIuPTR/PRIxPTR macros - * for internal format-args checker. */ -#undef PRIuPTR -#undef PRIiPTR -#undef PRIdPTR -#undef PRIxPTR -#define PRIuPTR "Iu" -#define PRIiPTR "Ii" -#define PRIdPTR "Id" -#define PRIxPTR "Ix" -#define PRIuSIZE "zu" -#define PRIiSIZE "zi" -#define PRIdSIZE "zd" -#define PRIxSIZE "zx" -#endif /* fix PRI*PTR for _MSC_VER */ - -#ifndef PRIuSIZE -#define PRIuSIZE PRIuPTR -#define PRIiSIZE PRIiPTR -#define PRIdSIZE PRIdPTR -#define PRIxSIZE PRIxPTR -#endif /* PRI*SIZE macros for MSVC */ - -#ifdef __cplusplus -} -#endif - -#ifdef _MSC_VER -#pragma warning(pop) -#endif diff --git a/libs/libmdbx/src/src/elements/version.c b/libs/libmdbx/src/src/elements/version.c deleted file mode 100644 index 1d964a93a1..0000000000 --- a/libs/libmdbx/src/src/elements/version.c +++ /dev/null @@ -1,46 +0,0 @@ -/* This is CMake-template for libmdbx's version.c - ******************************************************************************/ - -#include "internals.h" - -#if MDBX_VERSION_MAJOR != 0 || \ - MDBX_VERSION_MINOR != 6 -#error "API version mismatch! Had `git fetch --tags` done?" -#endif - -static const char sourcery[] = STRINGIFY(MDBX_BUILD_SOURCERY); - -__dll_export -#ifdef __attribute_used__ - __attribute_used__ -#elif defined(__GNUC__) || __has_attribute(__used__) - __attribute__((__used__)) -#endif -#ifdef __attribute_externally_visible__ - __attribute_externally_visible__ -#elif (defined(__GNUC__) && !defined(__clang__)) || \ - __has_attribute(__externally_visible__) - __attribute__((__externally_visible__)) -#endif - const mdbx_version_info mdbx_version = { - 0, - 6, - 0, - 1935, - {"2020-03-20T17:45:36+03:00", "e01a07c814dffd0b1433ad536da16ab95344615a", "c20ba1e84f51ca9dd10603fe461b1bcc171aa075", - "v0.6.0-45-gc20ba1e"}, - sourcery}; - -__dll_export -#ifdef __attribute_used__ - __attribute_used__ -#elif defined(__GNUC__) || __has_attribute(__used__) - __attribute__((__used__)) -#endif -#ifdef __attribute_externally_visible__ - __attribute_externally_visible__ -#elif (defined(__GNUC__) && !defined(__clang__)) || \ - __has_attribute(__externally_visible__) - __attribute__((__externally_visible__)) -#endif - const char *const mdbx_sourcery_anchor = sourcery; diff --git a/libs/libmdbx/src/src/elements/version.c.in b/libs/libmdbx/src/src/elements/version.c.in deleted file mode 100644 index 2854bd5d9d..0000000000 --- a/libs/libmdbx/src/src/elements/version.c.in +++ /dev/null @@ -1,46 +0,0 @@ -/* This is CMake-template for libmdbx's version.c - ******************************************************************************/ - -#include "internals.h" - -#if MDBX_VERSION_MAJOR != ${MDBX_VERSION_MAJOR} || \ - MDBX_VERSION_MINOR != ${MDBX_VERSION_MINOR} -#error "API version mismatch! Had `git fetch --tags` done?" -#endif - -static const char sourcery[] = STRINGIFY(MDBX_BUILD_SOURCERY); - -__dll_export -#ifdef __attribute_used__ - __attribute_used__ -#elif defined(__GNUC__) || __has_attribute(__used__) - __attribute__((__used__)) -#endif -#ifdef __attribute_externally_visible__ - __attribute_externally_visible__ -#elif (defined(__GNUC__) && !defined(__clang__)) || \ - __has_attribute(__externally_visible__) - __attribute__((__externally_visible__)) -#endif - const mdbx_version_info mdbx_version = { - ${MDBX_VERSION_MAJOR}, - ${MDBX_VERSION_MINOR}, - ${MDBX_VERSION_RELEASE}, - ${MDBX_VERSION_REVISION}, - {"@MDBX_GIT_TIMESTAMP@", "@MDBX_GIT_TREE@", "@MDBX_GIT_COMMIT@", - "@MDBX_GIT_DESCRIBE@"}, - sourcery}; - -__dll_export -#ifdef __attribute_used__ - __attribute_used__ -#elif defined(__GNUC__) || __has_attribute(__used__) - __attribute__((__used__)) -#endif -#ifdef __attribute_externally_visible__ - __attribute_externally_visible__ -#elif (defined(__GNUC__) && !defined(__clang__)) || \ - __has_attribute(__externally_visible__) - __attribute__((__externally_visible__)) -#endif - const char *const mdbx_sourcery_anchor = sourcery; diff --git a/libs/libmdbx/src/src/internals.h b/libs/libmdbx/src/src/internals.h new file mode 100644 index 0000000000..7ef818ca35 --- /dev/null +++ b/libs/libmdbx/src/src/internals.h @@ -0,0 +1,1346 @@ +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . */ + +#pragma once +#ifdef MDBX_CONFIG_H +#include "../config.h" +#endif + +/* *INDENT-OFF* */ +/* clang-format off */ + +/* In case the MDBX_DEBUG is undefined set it corresponding to NDEBUG */ +#ifndef MDBX_DEBUG +# ifdef NDEBUG +# define MDBX_DEBUG 0 +# else +# define MDBX_DEBUG 1 +# endif +#endif + +/* Undefine the NDEBUG if debugging is enforced by MDBX_DEBUG */ +#if MDBX_DEBUG +# undef NDEBUG +#endif + +#ifdef MDBX_ALLOY +/* Amalgamated build */ +# define MDBX_INTERNAL_FUNC static +# define MDBX_INTERNAL_VAR static +#else +/* Non-amalgamated build */ +# define MDBX_INTERNAL_FUNC +# define MDBX_INTERNAL_VAR extern +#endif /* MDBX_ALLOY */ + +#ifndef MDBX_DISABLE_GNU_SOURCE +#define MDBX_DISABLE_GNU_SOURCE 0 +#endif +#if MDBX_DISABLE_GNU_SOURCE +#undef _GNU_SOURCE +#elif defined(__linux__) || defined(__gnu_linux__) +#define _GNU_SOURCE +#endif + +/*----------------------------------------------------------------------------*/ + +/* Should be defined before any includes */ +#ifndef _FILE_OFFSET_BITS +# define _FILE_OFFSET_BITS 64 +#endif + +#ifdef __APPLE__ +#define _DARWIN_C_SOURCE +#endif + +#ifdef _MSC_VER +# if _MSC_VER < 1400 +# error "Microsoft Visual C++ 8.0 (Visual Studio 2005) or later version is required" +# endif +# ifndef _CRT_SECURE_NO_WARNINGS +# define _CRT_SECURE_NO_WARNINGS +# endif +#if _MSC_VER > 1800 +# pragma warning(disable : 4464) /* relative include path contains '..' */ +#endif +#if _MSC_VER > 1913 +# pragma warning(disable : 5045) /* Compiler will insert Spectre mitigation... */ +#endif +#pragma warning(disable : 4710) /* 'xyz': function not inlined */ +#pragma warning(disable : 4711) /* function 'xyz' selected for automatic inline expansion */ +#pragma warning(disable : 4201) /* nonstandard extension used : nameless struct / union */ +#pragma warning(disable : 4702) /* unreachable code */ +#pragma warning(disable : 4706) /* assignment within conditional expression */ +#pragma warning(disable : 4127) /* conditional expression is constant */ +#pragma warning(disable : 4324) /* 'xyz': structure was padded due to alignment specifier */ +#pragma warning(disable : 4310) /* cast truncates constant value */ +#pragma warning(disable : 4820) /* bytes padding added after data member for aligment */ +#pragma warning(disable : 4548) /* expression before comma has no effect; expected expression with side - effect */ +#pragma warning(disable : 4366) /* the result of the unary '&' operator may be unaligned */ +#pragma warning(disable : 4200) /* nonstandard extension used: zero-sized array in struct/union */ +#endif /* _MSC_VER (warnings) */ + +#include "../mdbx.h" +#include "defs.h" + +#if defined(__GNUC__) && !__GNUC_PREREQ(4,2) + /* Actualy libmdbx was not tested with compilers older than GCC from RHEL6. + * But you could remove this #error and try to continue at your own risk. + * In such case please don't rise up an issues related ONLY to old compilers. + */ +# warning "libmdbx required GCC >= 4.2" +#endif + +#if defined(__clang__) && !__CLANG_PREREQ(3,8) + /* Actualy libmdbx was not tested with CLANG older than 3.8. + * But you could remove this #error and try to continue at your own risk. + * In such case please don't rise up an issues related ONLY to old compilers. + */ +# warning "libmdbx required CLANG >= 3.8" +#endif + +#if defined(__GLIBC__) && !__GLIBC_PREREQ(2,12) + /* Actualy libmdbx was not tested with something older than glibc 2.12 (from RHEL6). + * But you could remove this #error and try to continue at your own risk. + * In such case please don't rise up an issues related ONLY to old systems. + */ +# warning "libmdbx required at least GLIBC 2.12." +#endif + +#ifdef __SANITIZE_THREAD__ +# warning "libmdbx don't compatible with ThreadSanitizer, you will get a lot of false-positive issues." +#endif /* __SANITIZE_THREAD__ */ + +#if __has_warning("-Wconstant-logical-operand") +# if defined(__clang__) +# pragma clang diagnostic ignored "-Wconstant-logical-operand" +# elif defined(__GNUC__) +# pragma GCC diagnostic ignored "-Wconstant-logical-operand" +# else +# pragma warning disable "constant-logical-operand" +# endif +#endif /* -Wconstant-logical-operand */ + +#if defined(__LCC__) && (__LCC__ <= 121) + /* bug #2798 */ +# pragma diag_suppress alignment_reduction_ignored +#elif defined(__ICC) +# pragma warning(disable: 3453 1366) +#elif __has_warning("-Walignment-reduction-ignored") +# if defined(__clang__) +# pragma clang diagnostic ignored "-Walignment-reduction-ignored" +# elif defined(__GNUC__) +# pragma GCC diagnostic ignored "-Walignment-reduction-ignored" +# else +# pragma warning disable "alignment-reduction-ignored" +# endif +#endif /* -Walignment-reduction-ignored */ + +/* *INDENT-ON* */ +/* clang-format on */ + +#include "osal.h" + +#define mdbx_sourcery_anchor XCONCAT(mdbx_sourcery_, MDBX_BUILD_SOURCERY) +#if defined(MDBX_TOOLS) +extern LIBMDBX_API const char *const mdbx_sourcery_anchor; +#endif + +#include "options.h" + +/*----------------------------------------------------------------------------*/ +/* Basic constants and types */ + +/* The minimum number of keys required in a database page. + * Setting this to a larger value will place a smaller bound on the + * maximum size of a data item. Data items larger than this size will + * be pushed into overflow pages instead of being stored directly in + * the B-tree node. This value used to default to 4. With a page size + * of 4096 bytes that meant that any item larger than 1024 bytes would + * go into an overflow page. That also meant that on average 2-3KB of + * each overflow page was wasted space. The value cannot be lower than + * 2 because then there would no longer be a tree structure. With this + * value, items larger than 2KB will go into overflow pages, and on + * average only 1KB will be wasted. */ +#define MDBX_MINKEYS 2 + +/* A stamp that identifies a file as an MDBX file. + * There's nothing special about this value other than that it is easily + * recognizable, and it will reflect any byte order mismatches. */ +#define MDBX_MAGIC UINT64_C(/* 56-bit prime */ 0x59659DBDEF4C11) + +/* The version number for a database's datafile format. */ +#define MDBX_DATA_VERSION 2 +/* The version number for a database's lockfile format. */ +#define MDBX_LOCK_VERSION 3 + +/* handle for the DB used to track free pages. */ +#define FREE_DBI 0 +/* handle for the default DB. */ +#define MAIN_DBI 1 +/* Number of DBs in metapage (free and main) - also hardcoded elsewhere */ +#define CORE_DBS 2 +#define MAX_DBI (INT16_MAX - CORE_DBS) +#if MAX_DBI != MDBX_MAX_DBI +#error "Opps, MAX_DBI != MDBX_MAX_DBI" +#endif + +/* Number of meta pages - also hardcoded elsewhere */ +#define NUM_METAS 3 + +/* A page number in the database. + * + * MDBX uses 32 bit for page numbers. This limits database + * size up to 2^44 bytes, in case of 4K pages. */ +typedef uint32_t pgno_t; +#define PRIaPGNO PRIu32 +#define MAX_PAGENO UINT32_C(0x7FFFffff) +#define MIN_PAGENO NUM_METAS + +/* A transaction ID. */ +typedef uint64_t txnid_t; +#define PRIaTXN PRIi64 +#define MIN_TXNID UINT64_C(1) +#define INVALID_TXNID UINT64_MAX +/* LY: for testing non-atomic 64-bit txnid on 32-bit arches. + * #define MDBX_TXNID_STEP (UINT32_MAX / 3) */ +#ifndef MDBX_TXNID_STEP +#if MDBX_64BIT_CAS +#define MDBX_TXNID_STEP 1u +#else +#define MDBX_TXNID_STEP 2u +#endif +#endif /* MDBX_TXNID_STEP */ + +/* Used for offsets within a single page. + * Since memory pages are typically 4 or 8KB in size, 12-13 bits, + * this is plenty. */ +typedef uint16_t indx_t; + +#define MEGABYTE ((size_t)1 << 20) + +/*----------------------------------------------------------------------------*/ +/* Core structures for database and shared memory (i.e. format definition) */ +#pragma pack(push, 1) + +typedef union mdbx_safe64 { + volatile uint64_t inconsistent; +#if MDBX_64BIT_ATOMIC + volatile uint64_t atomic; +#endif /* MDBX_64BIT_ATOMIC */ + struct { +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + volatile uint32_t low; + volatile uint32_t high; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + volatile uint32_t high; + volatile uint32_t low; +#else +#error "FIXME: Unsupported byte order" +#endif /* __BYTE_ORDER__ */ + }; +} mdbx_safe64_t; + +#define SAFE64_INVALID_THRESHOLD UINT64_C(0xffffFFFF00000000) + +/* Information about a single database in the environment. */ +typedef struct MDBX_db { + uint16_t md_flags; /* see mdbx_dbi_open */ + uint16_t md_depth; /* depth of this tree */ + uint32_t md_xsize; /* key-size for MDBX_DUPFIXED (LEAF2 pages) */ + pgno_t md_root; /* the root page of this tree */ + pgno_t md_branch_pages; /* number of internal pages */ + pgno_t md_leaf_pages; /* number of leaf pages */ + pgno_t md_overflow_pages; /* number of overflow pages */ + uint64_t md_seq; /* table sequence counter */ + uint64_t md_entries; /* number of data items */ + uint64_t md_mod_txnid; /* txnid of last commited modification */ +} MDBX_db; + +/* database size-related parameters */ +typedef struct mdbx_geo_t { + uint16_t grow; /* datafile growth step in pages */ + uint16_t shrink; /* datafile shrink threshold in pages */ + pgno_t lower; /* minimal size of datafile in pages */ + pgno_t upper; /* maximal size of datafile in pages */ + pgno_t now; /* current size of datafile in pages */ + pgno_t next; /* first unused page in the datafile, + * but actually the file may be shorter. */ +} mdbx_geo_t; + +/* Meta page content. + * A meta page is the start point for accessing a database snapshot. + * Pages 0-1 are meta pages. Transaction N writes meta page (N % 2). */ +typedef struct MDBX_meta { + /* Stamp identifying this as an MDBX file. + * It must be set to MDBX_MAGIC with MDBX_DATA_VERSION. */ + uint64_t mm_magic_and_version; + + /* txnid that committed this page, the first of a two-phase-update pair */ + mdbx_safe64_t mm_txnid_a; + + uint16_t mm_extra_flags; /* extra DB flags, zero (nothing) for now */ + uint8_t mm_validator_id; /* ID of checksum and page validation method, + * zero (nothing) for now */ + uint8_t mm_extra_pagehdr; /* extra bytes in the page header, + * zero (nothing) for now */ + + mdbx_geo_t mm_geo; /* database size-related parameters */ + + MDBX_db mm_dbs[CORE_DBS]; /* first is free space, 2nd is main db */ + /* The size of pages used in this DB */ +#define mm_psize mm_dbs[FREE_DBI].md_xsize +/* Any persistent environment flags, see mdbx_env */ +#define mm_flags mm_dbs[FREE_DBI].md_flags + mdbx_canary mm_canary; + +#define MDBX_DATASIGN_NONE 0u +#define MDBX_DATASIGN_WEAK 1u +#define SIGN_IS_STEADY(sign) ((sign) > MDBX_DATASIGN_WEAK) +#define META_IS_STEADY(meta) SIGN_IS_STEADY((meta)->mm_datasync_sign) + volatile uint64_t mm_datasync_sign; + + /* txnid that committed this page, the second of a two-phase-update pair */ + mdbx_safe64_t mm_txnid_b; + + /* Number of non-meta pages which were put in GC after COW. May be 0 in case + * DB was previously handled by libmdbx without corresponding feature. + * This value in couple with mr_snapshot_pages_retired allows fast estimation + * of "how much reader is restraining GC recycling". */ + uint64_t mm_pages_retired; + + /* The analogue /proc/sys/kernel/random/boot_id or similar to determine + * whether the system was rebooted after the last use of the database files. + * If there was no reboot, but there is no need to rollback to the last + * steady sync point. Zeros mean that no relevant information is available + * from the system. */ + bin128_t mm_bootid; + +} MDBX_meta; + +/* Common header for all page types. The page type depends on mp_flags. + * + * P_BRANCH and P_LEAF pages have unsorted 'MDBX_node's at the end, with + * sorted mp_ptrs[] entries referring to them. Exception: P_LEAF2 pages + * omit mp_ptrs and pack sorted MDBX_DUPFIXED values after the page header. + * + * P_OVERFLOW records occupy one or more contiguous pages where only the + * first has a page header. They hold the real data of F_BIGDATA nodes. + * + * P_SUBP sub-pages are small leaf "pages" with duplicate data. + * A node with flag F_DUPDATA but not F_SUBDATA contains a sub-page. + * (Duplicate data can also go in sub-databases, which use normal pages.) + * + * P_META pages contain MDBX_meta, the start point of an MDBX snapshot. + * + * Each non-metapage up to MDBX_meta.mm_last_pg is reachable exactly once + * in the snapshot: Either used by a database or listed in a GC record. */ +typedef struct MDBX_page { + union { + struct MDBX_page *mp_next; /* for in-memory list of freed pages */ + uint64_t mp_txnid; /* txnid during which the page has been COW-ed */ + }; + uint16_t mp_leaf2_ksize; /* key size if this is a LEAF2 page */ +#define P_BRANCH 0x01 /* branch page */ +#define P_LEAF 0x02 /* leaf page */ +#define P_OVERFLOW 0x04 /* overflow page */ +#define P_META 0x08 /* meta page */ +#define P_DIRTY 0x10 /* dirty page, also set for P_SUBP pages */ +#define P_LEAF2 0x20 /* for MDBX_DUPFIXED records */ +#define P_SUBP 0x40 /* for MDBX_DUPSORT sub-pages */ +#define P_LOOSE 0x4000 /* page was dirtied then freed, can be reused */ +#define P_KEEP 0x8000 /* leave this page alone during spill */ + uint16_t mp_flags; + union { + struct { + indx_t mp_lower; /* lower bound of free space */ + indx_t mp_upper; /* upper bound of free space */ + }; + uint32_t mp_pages; /* number of overflow pages */ + }; + pgno_t mp_pgno; /* page number */ + + /* dynamic size */ + indx_t mp_ptrs[/* C99 */]; +} MDBX_page; + +/* Size of the page header, excluding dynamic data at the end */ +#define PAGEHDRSZ ((unsigned)offsetof(MDBX_page, mp_ptrs)) + +#pragma pack(pop) + +#if MDBX_LOCKING == MDBX_LOCKING_WIN32FILES +#define MDBX_CLOCK_SIGN UINT32_C(0xF10C) +typedef void mdbx_ipclock_t; +#elif MDBX_LOCKING == MDBX_LOCKING_SYSV + +#define MDBX_CLOCK_SIGN UINT32_C(0xF18D) +typedef mdbx_pid_t mdbx_ipclock_t; +#ifndef EOWNERDEAD +#define EOWNERDEAD MDBX_RESULT_TRUE +#endif + +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ + MDBX_LOCKING == MDBX_LOCKING_POSIX2008 +#define MDBX_CLOCK_SIGN UINT32_C(0x8017) +typedef pthread_mutex_t mdbx_ipclock_t; +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 +#define MDBX_CLOCK_SIGN UINT32_C(0xFC29) +typedef sem_t mdbx_ipclock_t; +#else +#error "FIXME" +#endif /* MDBX_LOCKING */ + +#if MDBX_LOCKING > MDBX_LOCKING_SYSV +MDBX_INTERNAL_FUNC int mdbx_ipclock_stub(mdbx_ipclock_t *ipc); +MDBX_INTERNAL_FUNC int mdbx_ipclock_destroy(mdbx_ipclock_t *ipc); +#endif /* MDBX_LOCKING */ + +/* Reader Lock Table + * + * Readers don't acquire any locks for their data access. Instead, they + * simply record their transaction ID in the reader table. The reader + * mutex is needed just to find an empty slot in the reader table. The + * slot's address is saved in thread-specific data so that subsequent + * read transactions started by the same thread need no further locking to + * proceed. + * + * If MDBX_NOTLS is set, the slot address is not saved in thread-specific data. + * No reader table is used if the database is on a read-only filesystem. + * + * Since the database uses multi-version concurrency control, readers don't + * actually need any locking. This table is used to keep track of which + * readers are using data from which old transactions, so that we'll know + * when a particular old transaction is no longer in use. Old transactions + * that have discarded any data pages can then have those pages reclaimed + * for use by a later write transaction. + * + * The lock table is constructed such that reader slots are aligned with the + * processor's cache line size. Any slot is only ever used by one thread. + * This alignment guarantees that there will be no contention or cache + * thrashing as threads update their own slot info, and also eliminates + * any need for locking when accessing a slot. + * + * A writer thread will scan every slot in the table to determine the oldest + * outstanding reader transaction. Any freed pages older than this will be + * reclaimed by the writer. The writer doesn't use any locks when scanning + * this table. This means that there's no guarantee that the writer will + * see the most up-to-date reader info, but that's not required for correct + * operation - all we need is to know the upper bound on the oldest reader, + * we don't care at all about the newest reader. So the only consequence of + * reading stale information here is that old pages might hang around a + * while longer before being reclaimed. That's actually good anyway, because + * the longer we delay reclaiming old pages, the more likely it is that a + * string of contiguous pages can be found after coalescing old pages from + * many old transactions together. */ + +/* The actual reader record, with cacheline padding. */ +typedef struct MDBX_reader { + /* Current Transaction ID when this transaction began, or (txnid_t)-1. + * Multiple readers that start at the same time will probably have the + * same ID here. Again, it's not important to exclude them from + * anything; all we need to know is which version of the DB they + * started from so we can avoid overwriting any data used in that + * particular version. */ + mdbx_safe64_t /* txnid_t */ mr_txnid; + + /* The information we store in a single slot of the reader table. + * In addition to a transaction ID, we also record the process and + * thread ID that owns a slot, so that we can detect stale information, + * e.g. threads or processes that went away without cleaning up. + * + * NOTE: We currently don't check for stale records. + * We simply re-init the table when we know that we're the only process + * opening the lock file. */ + + /* The thread ID of the thread owning this txn. */ +#if MDBX_WORDBITS >= 64 + volatile uint64_t mr_tid; +#else + volatile uint32_t mr_tid; + volatile uint32_t mr_aba_curer; /* CSN to resolve ABA_problems on 32-bit arch, + unused for now */ +#endif + /* The process ID of the process owning this reader txn. */ + volatile uint32_t mr_pid; + + /* The number of pages used in the reader's MVCC snapshot, + * i.e. the value of meta->mm_geo.next and txn->mt_next_pgno */ + volatile pgno_t mr_snapshot_pages_used; + /* Number of retired pages at the time this reader starts transaction. So, + * at any time the difference mm_pages_retired - mr_snapshot_pages_retired + * will give the number of pages which this reader restraining from reuse. */ + volatile uint64_t mr_snapshot_pages_retired; +} MDBX_reader; + +/* The header for the reader table (a memory-mapped lock file). */ +typedef struct MDBX_lockinfo { + /* Stamp identifying this as an MDBX file. + * It must be set to MDBX_MAGIC with with MDBX_LOCK_VERSION. */ + uint64_t mti_magic_and_version; + + /* Format of this lock file. Must be set to MDBX_LOCK_FORMAT. */ + uint32_t mti_os_and_format; + + /* Flags which environment was opened. */ + volatile uint32_t mti_envmode; + + /* Threshold of un-synced-with-disk pages for auto-sync feature, + * zero means no-threshold, i.e. auto-sync is disabled. */ + volatile pgno_t mti_autosync_threshold; + + /* Low 32-bit of txnid with which meta-pages was synced, + * i.e. for sync-polling in the MDBX_NOMETASYNC mode. */ + volatile uint32_t mti_meta_sync_txnid; + + /* Period for timed auto-sync feature, i.e. at the every steady checkpoint + * the mti_unsynced_timeout sets to the current_time + mti_autosync_period. + * The time value is represented in a suitable system-dependent form, for + * example clock_gettime(CLOCK_BOOTTIME) or clock_gettime(CLOCK_MONOTONIC). + * Zero means timed auto-sync is disabled. */ + volatile uint64_t mti_autosync_period; + + /* Marker to distinguish uniqueness of DB/CLK.*/ + volatile uint64_t mti_bait_uniqueness; + + alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ + + /* Write transation lock. */ +#if MDBX_LOCKING > 0 + mdbx_ipclock_t mti_wlock; +#endif /* MDBX_LOCKING > 0 */ + + volatile txnid_t mti_oldest_reader; + + /* Timestamp of the last steady sync. Value is represented in a suitable + * system-dependent form, for example clock_gettime(CLOCK_BOOTTIME) or + * clock_gettime(CLOCK_MONOTONIC). */ + volatile uint64_t mti_sync_timestamp; + + /* Number un-synced-with-disk pages for auto-sync feature. */ + volatile pgno_t mti_unsynced_pages; + + /* Number of page which was discarded last time by madvise(MADV_FREE). */ + volatile pgno_t mti_discarded_tail; + + /* Timestamp of the last readers check. */ + volatile uint64_t mti_reader_check_timestamp; + + alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ + + /* Readeaders registration lock. */ +#if MDBX_LOCKING > 0 + mdbx_ipclock_t mti_rlock; +#endif /* MDBX_LOCKING > 0 */ + + /* The number of slots that have been used in the reader table. + * This always records the maximum count, it is not decremented + * when readers release their slots. */ + volatile unsigned mti_numreaders; + volatile unsigned mti_readers_refresh_flag; + + alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ + MDBX_reader mti_readers[/* C99 */]; +} MDBX_lockinfo; + +/* Lockfile format signature: version, features and field layout */ +#define MDBX_LOCK_FORMAT \ + (MDBX_CLOCK_SIGN * 27733 + (unsigned)sizeof(MDBX_reader) * 13 + \ + (unsigned)offsetof(MDBX_reader, mr_snapshot_pages_used) * 251 + \ + (unsigned)offsetof(MDBX_lockinfo, mti_oldest_reader) * 83 + \ + (unsigned)offsetof(MDBX_lockinfo, mti_numreaders) * 37 + \ + (unsigned)offsetof(MDBX_lockinfo, mti_readers) * 29) + +#define MDBX_DATA_MAGIC ((MDBX_MAGIC << 8) + MDBX_DATA_VERSION) +#define MDBX_DATA_MAGIC_DEVEL ((MDBX_MAGIC << 8) + 255) + +#define MDBX_LOCK_MAGIC ((MDBX_MAGIC << 8) + MDBX_LOCK_VERSION) + +#ifndef MDBX_ASSUME_MALLOC_OVERHEAD +#define MDBX_ASSUME_MALLOC_OVERHEAD (sizeof(void *) * 2u) +#endif /* MDBX_ASSUME_MALLOC_OVERHEAD */ + +/* The maximum size of a database page. + * + * It is 64K, but value-PAGEHDRSZ must fit in MDBX_page.mp_upper. + * + * MDBX will use database pages < OS pages if needed. + * That causes more I/O in write transactions: The OS must + * know (read) the whole page before writing a partial page. + * + * Note that we don't currently support Huge pages. On Linux, + * regular data files cannot use Huge pages, and in general + * Huge pages aren't actually pageable. We rely on the OS + * demand-pager to read our data and page it out when memory + * pressure from other processes is high. So until OSs have + * actual paging support for Huge pages, they're not viable. */ +#define MAX_PAGESIZE MDBX_MAX_PAGESIZE +#define MIN_PAGESIZE MDBX_MIN_PAGESIZE + +#define MIN_MAPSIZE (MIN_PAGESIZE * MIN_PAGENO) +#if defined(_WIN32) || defined(_WIN64) +#define MAX_MAPSIZE32 UINT32_C(0x38000000) +#else +#define MAX_MAPSIZE32 UINT32_C(0x7ff80000) +#endif +#define MAX_MAPSIZE64 (MAX_PAGENO * (uint64_t)MAX_PAGESIZE) + +#if MDBX_WORDBITS >= 64 +#define MAX_MAPSIZE MAX_MAPSIZE64 +#define MDBX_READERS_LIMIT \ + ((65536 - sizeof(MDBX_lockinfo)) / sizeof(MDBX_reader)) +#else +#define MDBX_READERS_LIMIT 1024 +#define MAX_MAPSIZE MAX_MAPSIZE32 +#endif /* MDBX_WORDBITS */ + +/*----------------------------------------------------------------------------*/ +/* Two kind lists of pages (aka PNL) */ + +/* An PNL is an Page Number List, a sorted array of IDs. The first element of + * the array is a counter for how many actual page-numbers are in the list. + * PNLs are sorted in descending order, this allow cut off a page with lowest + * pgno (at the tail) just truncating the list */ +#define MDBX_PNL_ASCENDING 0 +typedef pgno_t *MDBX_PNL; + +#if MDBX_PNL_ASCENDING +#define MDBX_PNL_ORDERED(first, last) ((first) < (last)) +#define MDBX_PNL_DISORDERED(first, last) ((first) >= (last)) +#else +#define MDBX_PNL_ORDERED(first, last) ((first) > (last)) +#define MDBX_PNL_DISORDERED(first, last) ((first) <= (last)) +#endif + +/* List of txnid, only for MDBX_txn.tw.lifo_reclaimed */ +typedef txnid_t *MDBX_TXL; + +/* An Dirty-Page list item is an pgno/pointer pair. */ +typedef union MDBX_DP { + struct { + pgno_t pgno; + MDBX_page *ptr; + }; + struct { + unsigned sorted; + unsigned length; + }; +} MDBX_DP; + +/* An DPL (dirty-page list) is a sorted array of MDBX_DPs. + * The first element's length member is a count of how many actual + * elements are in the array. */ +typedef MDBX_DP *MDBX_DPL; + +/* PNL sizes */ +#define MDBX_PNL_GRANULATE 1024 +#define MDBX_PNL_INITIAL \ + (MDBX_PNL_GRANULATE - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(pgno_t)) +#define MDBX_PNL_MAX \ + ((1u << 24) - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(pgno_t)) +#define MDBX_DPL_TXNFULL (MDBX_PNL_MAX / 4) + +#define MDBX_TXL_GRANULATE 32 +#define MDBX_TXL_INITIAL \ + (MDBX_TXL_GRANULATE - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(txnid_t)) +#define MDBX_TXL_MAX \ + ((1u << 17) - 2 - MDBX_ASSUME_MALLOC_OVERHEAD / sizeof(txnid_t)) + +#define MDBX_PNL_ALLOCLEN(pl) ((pl)[-1]) +#define MDBX_PNL_SIZE(pl) ((pl)[0]) +#define MDBX_PNL_FIRST(pl) ((pl)[1]) +#define MDBX_PNL_LAST(pl) ((pl)[MDBX_PNL_SIZE(pl)]) +#define MDBX_PNL_BEGIN(pl) (&(pl)[1]) +#define MDBX_PNL_END(pl) (&(pl)[MDBX_PNL_SIZE(pl) + 1]) + +#if MDBX_PNL_ASCENDING +#define MDBX_PNL_LEAST(pl) MDBX_PNL_FIRST(pl) +#define MDBX_PNL_MOST(pl) MDBX_PNL_LAST(pl) +#else +#define MDBX_PNL_LEAST(pl) MDBX_PNL_LAST(pl) +#define MDBX_PNL_MOST(pl) MDBX_PNL_FIRST(pl) +#endif + +#define MDBX_PNL_SIZEOF(pl) ((MDBX_PNL_SIZE(pl) + 1) * sizeof(pgno_t)) +#define MDBX_PNL_IS_EMPTY(pl) (MDBX_PNL_SIZE(pl) == 0) + +/*----------------------------------------------------------------------------*/ +/* Internal structures */ + +/* Auxiliary DB info. + * The information here is mostly static/read-only. There is + * only a single copy of this record in the environment. */ +typedef struct MDBX_dbx { + MDBX_val md_name; /* name of the database */ + MDBX_cmp_func *md_cmp; /* function for comparing keys */ + MDBX_cmp_func *md_dcmp; /* function for comparing data items */ +} MDBX_dbx; + +/* A database transaction. + * Every operation requires a transaction handle. */ +struct MDBX_txn { +#define MDBX_MT_SIGNATURE UINT32_C(0x93D53A31) + size_t mt_signature; + MDBX_txn *mt_parent; /* parent of a nested txn */ + /* Nested txn under this txn, set together with flag MDBX_TXN_HAS_CHILD */ + MDBX_txn *mt_child; + mdbx_geo_t mt_geo; + /* next unallocated page */ +#define mt_next_pgno mt_geo.next + /* corresponding to the current size of datafile */ +#define mt_end_pgno mt_geo.now + + /* Transaction Flags */ + /* mdbx_txn_begin() flags */ +#define MDBX_TXN_BEGIN_FLAGS \ + (MDBX_NOMETASYNC | MDBX_SAFE_NOSYNC | MDBX_MAPASYNC | MDBX_RDONLY | \ + MDBX_TRYTXN) + /* internal txn flags */ +#define MDBX_TXN_FINISHED 0x01 /* txn is finished or never began */ +#define MDBX_TXN_ERROR 0x02 /* txn is unusable after an error */ +#define MDBX_TXN_DIRTY 0x04 /* must write, even if dirty list is empty */ +#define MDBX_TXN_SPILLS 0x08 /* txn or a parent has spilled pages */ +#define MDBX_TXN_HAS_CHILD 0x10 /* txn has an MDBX_txn.mt_child */ + /* most operations on the txn are currently illegal */ +#define MDBX_TXN_BLOCKED \ + (MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_HAS_CHILD) + unsigned mt_flags; + /* The ID of this transaction. IDs are integers incrementing from 1. + * Only committed write transactions increment the ID. If a transaction + * aborts, the ID may be re-used by the next writer. */ + txnid_t mt_txnid; + MDBX_env *mt_env; /* the DB environment */ + /* Array of records for each DB known in the environment. */ + MDBX_dbx *mt_dbxs; + /* Array of MDBX_db records for each known DB */ + MDBX_db *mt_dbs; + /* Array of sequence numbers for each DB handle */ + unsigned *mt_dbiseqs; + + /* Transaction DB Flags */ +#define DB_DIRTY MDBX_TBL_DIRTY /* DB was written in this txn */ +#define DB_STALE MDBX_TBL_STALE /* Named-DB record is older than txnID */ +#define DB_FRESH MDBX_TBL_FRESH /* Named-DB handle opened in this txn */ +#define DB_CREAT MDBX_TBL_CREAT /* Named-DB handle created in this txn */ +#define DB_VALID 0x10 /* DB handle is valid, see also MDBX_VALID */ +#define DB_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */ +#define DB_DUPDATA 0x40 /* DB is MDBX_DUPSORT data */ +#define DB_AUDITED 0x80 /* Internal flag for accounting during audit */ + /* In write txns, array of cursors for each DB */ + MDBX_cursor **mt_cursors; + /* Array of flags for each DB */ + uint8_t *mt_dbflags; + /* Number of DB records in use, or 0 when the txn is finished. + * This number only ever increments until the txn finishes; we + * don't decrement it when individual DB handles are closed. */ + MDBX_dbi mt_numdbs; + size_t mt_owner; /* thread ID that owns this transaction */ + mdbx_canary mt_canary; + + union { + struct { + /* For read txns: This thread/txn's reader table slot, or NULL. */ + MDBX_reader *reader; + } to; + struct { + pgno_t *reclaimed_pglist; /* Reclaimed GC pages */ + txnid_t last_reclaimed; /* ID of last used record */ + pgno_t loose_refund_wl /* FIXME: describe */; + /* dirtylist room: Dirty array size - dirty pages visible to this txn. + * Includes ancestor txns' dirty pages not hidden by other txns' + * dirty/spilled pages. Thus commit(nested txn) has room to merge + * dirtylist into mt_parent after freeing hidden mt_parent pages. */ + unsigned dirtyroom; + /* For write txns: Modified pages. Sorted when not MDBX_WRITEMAP. */ + MDBX_DPL dirtylist; + /* The list of reclaimed txns from GC */ + MDBX_TXL lifo_reclaimed; + /* The list of pages that became unused during this transaction. */ + MDBX_PNL retired_pages; + /* The list of loose pages that became unused and may be reused + * in this transaction, linked through `mp_next`. */ + MDBX_page *loose_pages; + /* Number of loose pages (tw.loose_pages) */ + unsigned loose_count; + /* Number of retired to parent pages (tw.retired2parent_pages) */ + unsigned retired2parent_count; + /* The list of parent's txn dirty pages that retired (became unused) + * in this transaction, linked through `mp_next`. */ + MDBX_page *retired2parent_pages; + /* The sorted list of dirty pages we temporarily wrote to disk + * because the dirty list was full. page numbers in here are + * shifted left by 1, deleted slots have the LSB set. */ + MDBX_PNL spill_pages; + } tw; + }; +}; + +/* Enough space for 2^32 nodes with minimum of 2 keys per node. I.e., plenty. + * At 4 keys per node, enough for 2^64 nodes, so there's probably no need to + * raise this on a 64 bit machine. */ +#if MDBX_WORDBITS >= 64 +#define CURSOR_STACK 28 +#else +#define CURSOR_STACK 20 +#endif + +struct MDBX_xcursor; + +/* Cursors are used for all DB operations. + * A cursor holds a path of (page pointer, key index) from the DB + * root to a position in the DB, plus other state. MDBX_DUPSORT + * cursors include an xcursor to the current data item. Write txns + * track their cursors and keep them up to date when data moves. + * Exception: An xcursor's pointer to a P_SUBP page can be stale. + * (A node with F_DUPDATA but no F_SUBDATA contains a subpage). */ +struct MDBX_cursor { +#define MDBX_MC_SIGNATURE UINT32_C(0xFE05D5B1) +#define MDBX_MC_READY4CLOSE UINT32_C(0x2817A047) +#define MDBX_MC_WAIT4EOT UINT32_C(0x90E297A7) + uint32_t mc_signature; + /* The database handle this cursor operates on */ + MDBX_dbi mc_dbi; + /* Next cursor on this DB in this txn */ + MDBX_cursor *mc_next; + /* Backup of the original cursor if this cursor is a shadow */ + MDBX_cursor *mc_backup; + /* Context used for databases with MDBX_DUPSORT, otherwise NULL */ + struct MDBX_xcursor *mc_xcursor; + /* The transaction that owns this cursor */ + MDBX_txn *mc_txn; + /* The database record for this cursor */ + MDBX_db *mc_db; + /* The database auxiliary record for this cursor */ + MDBX_dbx *mc_dbx; + /* The mt_dbflag for this database */ + uint8_t *mc_dbflag; + uint16_t mc_snum; /* number of pushed pages */ + uint16_t mc_top; /* index of top page, normally mc_snum-1 */ + /* Cursor state flags. */ +#define C_INITIALIZED 0x01 /* cursor has been initialized and is valid */ +#define C_EOF 0x02 /* No more data */ +#define C_SUB 0x04 /* Cursor is a sub-cursor */ +#define C_DEL 0x08 /* last op was a cursor_del */ +#define C_UNTRACK 0x10 /* Un-track cursor when closing */ +#define C_RECLAIMING 0x20 /* GC lookup is prohibited */ +#define C_GCFREEZE 0x40 /* reclaimed_pglist must not be updated */ + unsigned mc_flags; /* see mdbx_cursor */ + MDBX_page *mc_pg[CURSOR_STACK]; /* stack of pushed pages */ + indx_t mc_ki[CURSOR_STACK]; /* stack of page indices */ +}; + +/* Context for sorted-dup records. + * We could have gone to a fully recursive design, with arbitrarily + * deep nesting of sub-databases. But for now we only handle these + * levels - main DB, optional sub-DB, sorted-duplicate DB. */ +typedef struct MDBX_xcursor { + /* A sub-cursor for traversing the Dup DB */ + MDBX_cursor mx_cursor; + /* The database record for this Dup DB */ + MDBX_db mx_db; + /* The auxiliary DB record for this Dup DB */ + MDBX_dbx mx_dbx; + /* The mt_dbflag for this Dup DB */ + uint8_t mx_dbflag; +} MDBX_xcursor; + +typedef struct MDBX_cursor_couple { + MDBX_cursor outer; + MDBX_xcursor inner; +} MDBX_cursor_couple; + +/* The database environment. */ +struct MDBX_env { +#define MDBX_ME_SIGNATURE UINT32_C(0x9A899641) + uint32_t me_signature; + /* Failed to update the meta page. Probably an I/O error. */ +#define MDBX_FATAL_ERROR UINT32_C(0x80000000) + /* Additional flag for mdbx_sync_locked() */ +#define MDBX_SHRINK_ALLOWED UINT32_C(0x40000000) + /* Some fields are initialized. */ +#define MDBX_ENV_ACTIVE UINT32_C(0x20000000) + /* me_txkey is set */ +#define MDBX_ENV_TXKEY UINT32_C(0x10000000) + uint32_t me_flags; + mdbx_mmap_t me_dxb_mmap; /* The main data file */ +#define me_map me_dxb_mmap.dxb +#define me_lazy_fd me_dxb_mmap.fd + mdbx_filehandle_t me_dsync_fd; + mdbx_mmap_t me_lck_mmap; /* The lock file */ +#define me_lfd me_lck_mmap.fd +#define me_lck me_lck_mmap.lck + + unsigned me_psize; /* DB page size, inited from me_os_psize */ + unsigned me_psize2log; /* log2 of DB page size */ + unsigned me_os_psize; /* OS page size, from mdbx_syspagesize() */ + unsigned me_maxreaders; /* size of the reader table */ + mdbx_fastmutex_t me_dbi_lock; + MDBX_dbi me_numdbs; /* number of DBs opened */ + MDBX_dbi me_maxdbs; /* size of the DB table */ + uint32_t me_pid; /* process ID of this env */ + mdbx_thread_key_t me_txkey; /* thread-key for readers */ + char *me_path; /* path to the DB files */ + void *me_pbuf; /* scratch area for DUPSORT put() */ + MDBX_txn *me_txn; /* current write transaction */ + MDBX_txn *me_txn0; /* prealloc'd write transaction */ + + /* write-txn lock */ +#if MDBX_LOCKING == MDBX_LOCKING_SYSV + union { + key_t key; + int semid; + } me_sysv_ipc; +#endif /* MDBX_LOCKING == MDBX_LOCKING_SYSV */ + +#if MDBX_LOCKING > 0 + mdbx_ipclock_t *me_wlock; +#endif /* MDBX_LOCKING > 0 */ + + MDBX_dbx *me_dbxs; /* array of static DB info */ + uint16_t *me_dbflags; /* array of flags from MDBX_db.md_flags */ + unsigned *me_dbiseqs; /* array of dbi sequence numbers */ + volatile txnid_t *me_oldest; /* ID of oldest reader last time we looked */ + MDBX_page *me_dpages; /* list of malloc'd blocks for re-use */ + /* PNL of pages that became unused in a write txn */ + MDBX_PNL me_retired_pages; + /* MDBX_DP of pages written during a write txn. Length MDBX_DPL_TXNFULL. */ + MDBX_DPL me_dirtylist; + /* Number of freelist items that can fit in a single overflow page */ + unsigned me_maxgc_ov1page; + unsigned me_branch_nodemax; /* max size of a branch-node */ + uint16_t me_maxkey_nd, me_maxkey_ds; + unsigned me_maxval_nd, me_maxval_ds; + uint32_t me_live_reader; /* have liveness lock in reader table */ + void *me_userctx; /* User-settable context */ + volatile uint64_t *me_sync_timestamp; + volatile uint64_t *me_autosync_period; + volatile pgno_t *me_unsynced_pages; + volatile pgno_t *me_autosync_threshold; + volatile pgno_t *me_discarded_tail; + volatile uint32_t *me_meta_sync_txnid; + MDBX_oom_func *me_oom_func; /* Callback for kicking laggard readers */ + struct { +#if MDBX_LOCKING > 0 + mdbx_ipclock_t wlock; +#endif /* MDBX_LOCKING > 0 */ + txnid_t oldest; + uint64_t sync_timestamp; + uint64_t autosync_period; + pgno_t autosync_pending; + pgno_t autosync_threshold; + pgno_t discarded_tail; + uint32_t meta_sync_txnid; + } me_lckless_stub; +#if MDBX_DEBUG + MDBX_assert_func *me_assert_func; /* Callback for assertion failures */ +#endif +#ifdef MDBX_USE_VALGRIND + int me_valgrind_handle; +#endif +#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) + pgno_t me_poison_edge; +#endif /* MDBX_USE_VALGRIND || __SANITIZE_ADDRESS__ */ + MDBX_env *me_lcklist_next; + + /* struct me_dbgeo used for accepting db-geo params from user for the new + * database creation, i.e. when mdbx_env_set_geometry() was called before + * mdbx_env_open(). */ + struct { + size_t lower; /* minimal size of datafile */ + size_t upper; /* maximal size of datafile */ + size_t now; /* current size of datafile */ + size_t grow; /* step to grow datafile */ + size_t shrink; /* threshold to shrink datafile */ + } me_dbgeo; + +#if defined(_WIN32) || defined(_WIN64) + MDBX_srwlock me_remap_guard; + /* Workaround for LockFileEx and WriteFile multithread bug */ + CRITICAL_SECTION me_windowsbug_lock; +#else + mdbx_fastmutex_t me_remap_guard; +#endif +}; + +/*----------------------------------------------------------------------------*/ +/* Debug and Logging stuff */ + +#define MDBX_RUNTIME_FLAGS_INIT \ + ((MDBX_DEBUG) > 0) * MDBX_DBG_ASSERT + ((MDBX_DEBUG) > 1) * MDBX_DBG_AUDIT + +#ifdef MDBX_ALLOY +static uint8_t mdbx_runtime_flags = MDBX_RUNTIME_FLAGS_INIT; +static uint8_t mdbx_loglevel = MDBX_DEBUG; +#else +extern uint8_t mdbx_runtime_flags; +extern uint8_t mdbx_loglevel; +#endif /* MDBX_ALLOY */ +MDBX_INTERNAL_VAR MDBX_debug_func *mdbx_debug_logger; + +MDBX_INTERNAL_FUNC void mdbx_debug_log(int type, const char *function, int line, + const char *fmt, ...) + __printf_args(4, 5); + +#if MDBX_DEBUG + +#define mdbx_assert_enabled() unlikely(mdbx_runtime_flags &MDBX_DBG_ASSERT) + +#define mdbx_audit_enabled() unlikely(mdbx_runtime_flags &MDBX_DBG_AUDIT) + +#ifdef MDBX_LOGLEVEL_BUILD +#define mdbx_log_enabled(msg) \ + (msg <= MDBX_LOGLEVEL_BUILD && unlikely(msg <= mdbx_loglevel)) +#else +#define mdbx_log_enabled(msg) unlikely(msg <= mdbx_loglevel) +#endif /* MDBX_LOGLEVEL_BUILD */ + +#else /* MDBX_DEBUG */ + +#define mdbx_audit_enabled() (0) + +#if !defined(NDEBUG) || defined(MDBX_FORCE_ASSERTIONS) +#define mdbx_assert_enabled() (1) +#else +#define mdbx_assert_enabled() (0) +#endif /* NDEBUG */ + +#ifdef MDBX_LOGLEVEL_BUILD +#define mdbx_log_enabled(msg) (msg <= MDBX_LOGLEVEL_BUILD) +#else +#define mdbx_log_enabled(msg) (0) +#endif /* MDBX_LOGLEVEL_BUILD */ + +#endif /* MDBX_DEBUG */ + +#if defined(__ANDROID_API__) +#define mdbx_panic(fmt, ...) \ + __android_log_assert("panic", "mdbx", fmt, __VA_ARGS__) +#else +MDBX_INTERNAL_FUNC void mdbx_panic(const char *fmt, ...) __printf_args(1, 2); +#endif + +#if !MDBX_DEBUG && defined(__ANDROID_API__) +#define mdbx_assert_fail(env, msg, func, line) \ + __android_log_assert(msg, "mdbx", "%s:%u", func, line) +#else +MDBX_INTERNAL_FUNC void mdbx_assert_fail(const MDBX_env *env, const char *msg, + const char *func, int line); +#endif + +#define mdbx_debug_extra(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_EXTRA)) \ + mdbx_debug_log(MDBX_LOG_EXTRA, __func__, __LINE__, fmt, __VA_ARGS__); \ + } while (0) + +#define mdbx_debug_extra_print(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_EXTRA)) \ + mdbx_debug_log(MDBX_LOG_EXTRA, NULL, 0, fmt, __VA_ARGS__); \ + } while (0) + +#define mdbx_trace(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_TRACE)) \ + mdbx_debug_log(MDBX_LOG_TRACE, __func__, __LINE__, fmt "\n", \ + __VA_ARGS__); \ + } while (0) + +#define mdbx_debug(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_DEBUG)) \ + mdbx_debug_log(MDBX_LOG_DEBUG, __func__, __LINE__, fmt "\n", \ + __VA_ARGS__); \ + } while (0) + +#define mdbx_verbose(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_VERBOSE)) \ + mdbx_debug_log(MDBX_LOG_VERBOSE, __func__, __LINE__, fmt "\n", \ + __VA_ARGS__); \ + } while (0) + +#define mdbx_notice(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_NOTICE)) \ + mdbx_debug_log(MDBX_LOG_NOTICE, __func__, __LINE__, fmt "\n", \ + __VA_ARGS__); \ + } while (0) + +#define mdbx_warning(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_WARN)) \ + mdbx_debug_log(MDBX_LOG_WARN, __func__, __LINE__, fmt "\n", \ + __VA_ARGS__); \ + } while (0) + +#define mdbx_error(fmt, ...) \ + do { \ + if (mdbx_log_enabled(MDBX_LOG_ERROR)) \ + mdbx_debug_log(MDBX_LOG_ERROR, __func__, __LINE__, fmt "\n", \ + __VA_ARGS__); \ + } while (0) + +#define mdbx_fatal(fmt, ...) \ + mdbx_debug_log(MDBX_LOG_FATAL, __func__, __LINE__, fmt "\n", __VA_ARGS__); + +#define mdbx_ensure_msg(env, expr, msg) \ + do { \ + if (unlikely(!(expr))) \ + mdbx_assert_fail(env, msg, __func__, __LINE__); \ + } while (0) + +#define mdbx_ensure(env, expr) mdbx_ensure_msg(env, expr, #expr) + +/* assert(3) variant in environment context */ +#define mdbx_assert(env, expr) \ + do { \ + if (mdbx_assert_enabled()) \ + mdbx_ensure(env, expr); \ + } while (0) + +/* assert(3) variant in cursor context */ +#define mdbx_cassert(mc, expr) mdbx_assert((mc)->mc_txn->mt_env, expr) + +/* assert(3) variant in transaction context */ +#define mdbx_tassert(txn, expr) mdbx_assert((txn)->mt_env, expr) + +#ifndef MDBX_TOOLS /* Avoid using internal mdbx_assert() */ +#undef assert +#define assert(expr) mdbx_assert(NULL, expr) +#endif + +/*----------------------------------------------------------------------------*/ +/* Cache coherence and mmap invalidation */ + +#if MDBX_CPU_WRITEBACK_INCOHERENT +#define mdbx_flush_incoherent_cpu_writeback() mdbx_memory_barrier() +#else +#define mdbx_flush_incoherent_cpu_writeback() mdbx_compiler_barrier() +#endif /* MDBX_CPU_WRITEBACK_INCOHERENT */ + +static __maybe_unused __inline void +mdbx_flush_incoherent_mmap(void *addr, size_t nbytes, const intptr_t pagesize) { +#if MDBX_MMAP_INCOHERENT_FILE_WRITE + char *const begin = (char *)(-pagesize & (intptr_t)addr); + char *const end = + (char *)(-pagesize & (intptr_t)((char *)addr + nbytes + pagesize - 1)); + int err = msync(begin, end - begin, MS_SYNC | MS_INVALIDATE) ? errno : 0; + mdbx_assert(nullptr, err == 0); + (void)err; +#else + (void)pagesize; +#endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ + +#if MDBX_MMAP_INCOHERENT_CPU_CACHE +#ifdef DCACHE + /* MIPS has cache coherency issues. + * Note: for any nbytes >= on-chip cache size, entire is flushed. */ + cacheflush(addr, nbytes, DCACHE); +#else +#error "Oops, cacheflush() not available" +#endif /* DCACHE */ +#endif /* MDBX_MMAP_INCOHERENT_CPU_CACHE */ + +#if !MDBX_MMAP_INCOHERENT_FILE_WRITE && !MDBX_MMAP_INCOHERENT_CPU_CACHE + (void)addr; + (void)nbytes; +#endif +} + +/*----------------------------------------------------------------------------*/ +/* Internal prototypes */ + +MDBX_INTERNAL_FUNC int mdbx_reader_check0(MDBX_env *env, int rlocked, + int *dead); +MDBX_INTERNAL_FUNC int mdbx_rthc_alloc(mdbx_thread_key_t *key, + MDBX_reader *begin, MDBX_reader *end); +MDBX_INTERNAL_FUNC void mdbx_rthc_remove(const mdbx_thread_key_t key); + +MDBX_INTERNAL_FUNC void mdbx_rthc_global_init(void); +MDBX_INTERNAL_FUNC void mdbx_rthc_global_dtor(void); +MDBX_INTERNAL_FUNC void mdbx_rthc_thread_dtor(void *ptr); + +#define MDBX_IS_ERROR(rc) \ + ((rc) != MDBX_RESULT_TRUE && (rc) != MDBX_RESULT_FALSE) + +/* Internal error codes, not exposed outside libmdbx */ +#define MDBX_NO_ROOT (MDBX_LAST_LMDB_ERRCODE + 10) + +/* Debugging output value of a cursor DBI: Negative in a sub-cursor. */ +#define DDBI(mc) \ + (((mc)->mc_flags & C_SUB) ? -(int)(mc)->mc_dbi : (int)(mc)->mc_dbi) + +/* Key size which fits in a DKBUF. */ +#define DKBUF_MAXKEYSIZE 511 /* FIXME */ + +#if MDBX_DEBUG +#define DKBUF char _kbuf[DKBUF_MAXKEYSIZE * 4 + 2] +#define DKEY(x) mdbx_dump_val(x, _kbuf, DKBUF_MAXKEYSIZE * 2 + 1) +#define DVAL(x) \ + mdbx_dump_val(x, _kbuf + DKBUF_MAXKEYSIZE * 2 + 1, DKBUF_MAXKEYSIZE * 2 + 1) +#else +#define DKBUF ((void)(0)) +#define DKEY(x) ("-") +#define DVAL(x) ("-") +#endif + +/* An invalid page number. + * Mainly used to denote an empty tree. */ +#define P_INVALID (~(pgno_t)0) + +/* Test if the flags f are set in a flag word w. */ +#define F_ISSET(w, f) (((w) & (f)) == (f)) + +/* Round n up to an even number. */ +#define EVEN(n) (((n) + 1U) & -2) /* sign-extending -2 to match n+1U */ + +/* Default size of memory map. + * This is certainly too small for any actual applications. Apps should + * always set the size explicitly using mdbx_env_set_mapsize(). */ +#define DEFAULT_MAPSIZE MEGABYTE + +/* Number of slots in the reader table. + * This value was chosen somewhat arbitrarily. The 61 is a prime number, + * and such readers plus a couple mutexes fit into single 4KB page. + * Applications should set the table size using mdbx_env_set_maxreaders(). */ +#define DEFAULT_READERS 61 + +/* Test if a page is a leaf page */ +#define IS_LEAF(p) (((p)->mp_flags & P_LEAF) != 0) +/* Test if a page is a LEAF2 page */ +#define IS_LEAF2(p) unlikely(((p)->mp_flags & P_LEAF2) != 0) +/* Test if a page is a branch page */ +#define IS_BRANCH(p) (((p)->mp_flags & P_BRANCH) != 0) +/* Test if a page is an overflow page */ +#define IS_OVERFLOW(p) unlikely(((p)->mp_flags & P_OVERFLOW) != 0) +/* Test if a page is a sub page */ +#define IS_SUBP(p) (((p)->mp_flags & P_SUBP) != 0) +/* Test if a page is dirty */ +#define IS_DIRTY(p) (((p)->mp_flags & P_DIRTY) != 0) + +#define PAGETYPE(p) ((p)->mp_flags & (P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW)) + +/* Header for a single key/data pair within a page. + * Used in pages of type P_BRANCH and P_LEAF without P_LEAF2. + * We guarantee 2-byte alignment for 'MDBX_node's. + * + * mn_lo and mn_hi are used for data size on leaf nodes, and for child + * pgno on branch nodes. On 64 bit platforms, mn_flags is also used + * for pgno. (Branch nodes have no flags). Lo and hi are in host byte + * order in case some accesses can be optimized to 32-bit word access. + * + * Leaf node flags describe node contents. F_BIGDATA says the node's + * data part is the page number of an overflow page with actual data. + * F_DUPDATA and F_SUBDATA can be combined giving duplicate data in + * a sub-page/sub-database, and named databases (just F_SUBDATA). */ +typedef struct MDBX_node { +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + union { + struct { + uint16_t mn_lo, mn_hi; /* part of data size or pgno */ + }; + uint32_t mn_dsize; + uint32_t mn_pgno32; + }; + uint8_t mn_flags; /* see mdbx_node flags */ + uint8_t mn_extra; + uint16_t mn_ksize; /* key size */ +#else + uint16_t mn_ksize; /* key size */ + uint8_t mn_extra; + uint8_t mn_flags; /* see mdbx_node flags */ + union { + uint32_t mn_pgno32; + uint32_t mn_dsize; + struct { + uint16_t mn_hi, mn_lo; /* part of data size or pgno */ + }; + }; +#endif /* __BYTE_ORDER__ */ + + /* mdbx_node Flags */ +#define F_BIGDATA 0x01 /* data put on overflow page */ +#define F_SUBDATA 0x02 /* data is a sub-database */ +#define F_DUPDATA 0x04 /* data has duplicates */ + + /* valid flags for mdbx_node_add() */ +#define NODE_ADD_FLAGS (F_DUPDATA | F_SUBDATA | MDBX_RESERVE | MDBX_APPEND) + uint8_t mn_data[/* C99 */]; /* key and data are appended here */ +} MDBX_node; + +#define MDBX_VALID 0x8000 /* DB handle is valid, for me_dbflags */ +#define PERSISTENT_FLAGS (0xffff & ~(MDBX_VALID)) +/* mdbx_dbi_open() flags */ +#define VALID_FLAGS \ + (MDBX_REVERSEKEY | MDBX_DUPSORT | MDBX_INTEGERKEY | MDBX_DUPFIXED | \ + MDBX_INTEGERDUP | MDBX_REVERSEDUP | MDBX_CREATE) + +/* max number of pages to commit in one writev() call */ +#define MDBX_COMMIT_PAGES 64 +#if defined(IOV_MAX) && IOV_MAX < MDBX_COMMIT_PAGES /* sysconf(_SC_IOV_MAX) */ +#undef MDBX_COMMIT_PAGES +#define MDBX_COMMIT_PAGES IOV_MAX +#endif + +/* + * / + * | -1, a < b + * CMP2INT(a,b) = < 0, a == b + * | 1, a > b + * \ + */ +#if 1 +/* LY: fast enough on most systems */ +#define CMP2INT(a, b) (((b) > (a)) ? -1 : (a) > (b)) +#else +#define CMP2INT(a, b) (((a) > (b)) - ((b) > (a))) +#endif + +/* Do not spill pages to disk if txn is getting full, may fail instead */ +#define MDBX_NOSPILL 0x8000 + +static __maybe_unused __inline pgno_t pgno_add(pgno_t base, pgno_t augend) { + assert(base <= MAX_PAGENO); + return (augend < MAX_PAGENO - base) ? base + augend : MAX_PAGENO; +} + +static __maybe_unused __inline pgno_t pgno_sub(pgno_t base, pgno_t subtrahend) { + assert(base >= MIN_PAGENO); + return (subtrahend < base - MIN_PAGENO) ? base - subtrahend : MIN_PAGENO; +} + +static __maybe_unused __inline void mdbx_jitter4testing(bool tiny) { +#if MDBX_DEBUG + if (MDBX_DBG_JITTER & mdbx_runtime_flags) + mdbx_osal_jitter(tiny); +#else + (void)tiny; +#endif +} + +static __pure_function __always_inline __maybe_unused bool +is_powerof2(size_t x) { + return (x & (x - 1)) == 0; +} + +static __pure_function __always_inline __maybe_unused size_t +floor_powerof2(size_t value, size_t granularity) { + assert(is_powerof2(granularity)); + return value & ~(granularity - 1); +} + +static __pure_function __always_inline __maybe_unused size_t +ceil_powerof2(size_t value, size_t granularity) { + return floor_powerof2(value + granularity - 1, granularity); +} diff --git a/libs/libmdbx/src/src/lck-posix.c b/libs/libmdbx/src/src/lck-posix.c new file mode 100644 index 0000000000..6b6127bd4b --- /dev/null +++ b/libs/libmdbx/src/src/lck-posix.c @@ -0,0 +1,839 @@ +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + */ + +#if !(defined(_WIN32) || defined(_WIN64)) /* !Windows LCK-implementation */ + +#include "internals.h" +#include + +/*----------------------------------------------------------------------------*/ +/* global constructor/destructor */ + +#if defined(__linux__) || defined(__gnu_linux__) + +#include + +#ifndef MDBX_ALLOY +uint32_t mdbx_linux_kernel_version; +bool mdbx_RunningOnWSL; +#endif /* MDBX_ALLOY */ + +static __cold bool probe_for_WSL(const char *tag) { + /* "Official" way of detecting WSL but not WSL2 + * https://github.com/Microsoft/WSL/issues/423#issuecomment-221627364 */ + return strstr(tag, "Microsoft") || strstr(tag, "WSL"); +} + +#endif /* Linux */ + +static __cold __attribute__((__constructor__)) void +mdbx_global_constructor(void) { +#if defined(__linux__) || defined(__gnu_linux__) + struct utsname buffer; + if (uname(&buffer) == 0) { + mdbx_RunningOnWSL = probe_for_WSL(buffer.version) || + probe_for_WSL(buffer.sysname) || + probe_for_WSL(buffer.release); + int i = 0; + char *p = buffer.release; + while (*p && i < 4) { + if (*p >= '0' && *p <= '9') { + long number = strtol(p, &p, 10); + if (number > 0) { + if (number > 255) + number = 255; + mdbx_linux_kernel_version += number << (24 - i * 8); + } + ++i; + } else { + ++p; + } + } + } +#endif /* Linux */ + + mdbx_rthc_global_init(); +} + +static __cold __attribute__((__destructor__)) void +mdbx_global_destructor(void) { + mdbx_rthc_global_dtor(); +} + +/*----------------------------------------------------------------------------*/ +/* lck */ + +/* Описание реализации блокировок для POSIX & Linux: + * + * lck-файл отображается в память, в нём организуется таблица читателей и + * размещаются совместно используемые posix-мьютексы (futex). Посредством + * этих мьютексов (см struct MDBX_lockinfo) реализуются: + * - Блокировка таблицы читателей для регистрации, + * т.е. функции mdbx_rdt_lock() и mdbx_rdt_unlock(). + * - Блокировка БД для пишущих транзакций, + * т.е. функции mdbx_txn_lock() и mdbx_txn_unlock(). + * + * Остальной функционал реализуется отдельно посредством файловых блокировок: + * - Первоначальный захват БД в режиме exclusive/shared и последующий перевод + * в операционный режим, функции mdbx_lck_seize() и mdbx_lck_downgrade(). + * - Проверка присутствие процессов-читателей, + * т.е. функции mdbx_rpid_set(), mdbx_rpid_clear() и mdbx_rpid_check(). + * + * Для блокировки файлов используется fcntl(F_SETLK), так как: + * - lockf() оперирует только эксклюзивной блокировкой и требует + * открытия файла в RW-режиме. + * - flock() не гарантирует атомарности при смене блокировок + * и оперирует только всем файлом целиком. + * - Для контроля процессов-читателей используются однобайтовые + * range-блокировки lck-файла посредством fcntl(F_SETLK). При этом + * в качестве позиции используется pid процесса-читателя. + * - Для первоначального захвата и shared/exclusive выполняется блокировка + * основного файла БД и при успехе lck-файла. + * + * ---------------------------------------------------------------------------- + * УДЕРЖИВАЕМЫЕ БЛОКИРОВКИ В ЗАВИСИМОСТИ ОТ РЕЖИМА И СОСТОЯНИЯ + * + * Эксклюзивный режим без lck-файла: + * = заблокирован весь dxb-файл посредством F_RDLCK или F_WRLCK, + * в зависимости от MDBX_RDONLY. + * + * Не-операционный режим на время пере-инициализации и разрушении lck-файла: + * = F_WRLCK блокировка первого байта lck-файла, другие процессы ждут её + * снятия при получении F_RDLCK через F_SETLKW. + * - блокировки dxb-файла могут меняться до снятие эксклюзивной блокировки + * lck-файла: + * + для НЕ-эксклюзивного режима блокировка pid-байта в dxb-файле + * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. + * + для ЭКСКЛЮЗИВНОГО режима блокировка pid-байта всего dxb-файла + * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. + * + * ОПЕРАЦИОННЫЙ режим с lck-файлом: + * = F_RDLCK блокировка первого байта lck-файла, другие процессы не могут + * получить F_WRLCK и таким образом видят что БД используется. + * + F_WRLCK блокировка pid-байта в clk-файле после первой транзакции чтения. + * + для НЕ-эксклюзивного режима блокировка pid-байта в dxb-файле + * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. + * + для ЭКСКЛЮЗИВНОГО режима блокировка pid-байта всего dxb-файла + * посредством F_RDLCK или F_WRLCK, в зависимости от MDBX_RDONLY. + */ + +#if MDBX_USE_OFDLOCKS +static int op_setlk, op_setlkw, op_getlk; +static void __cold choice_fcntl() { + assert(!op_setlk && !op_setlkw && !op_getlk); + if ((mdbx_runtime_flags & MDBX_DBG_LEGACY_MULTIOPEN) == 0 +#if defined(__linux__) || defined(__gnu_linux__) + && mdbx_linux_kernel_version > + 0x030f0000 /* OFD locks are available since 3.15, but engages here + only for 3.16 and later kernels (i.e. LTS) because + of reliability reasons */ +#endif /* linux */ + ) { + op_setlk = F_OFD_SETLK; + op_setlkw = F_OFD_SETLKW; + op_getlk = F_OFD_GETLK; + return; + } + op_setlk = F_SETLK; + op_setlkw = F_SETLKW; + op_getlk = F_GETLK; +} +#else +#define op_setlk F_SETLK +#define op_setlkw F_SETLKW +#define op_getlk F_GETLK +#endif /* MDBX_USE_OFDLOCKS */ + +#ifndef OFF_T_MAX +#define OFF_T_MAX \ + ((sizeof(off_t) > 4 ? INT64_MAX : INT32_MAX) & ~(size_t)0xffff) +#endif + +static int lck_op(mdbx_filehandle_t fd, int cmd, int lck, off_t offset, + off_t len) { + mdbx_jitter4testing(true); + for (;;) { + struct flock lock_op; + memset(&lock_op, 0, sizeof(lock_op)); + lock_op.l_type = lck; + lock_op.l_whence = SEEK_SET; + lock_op.l_start = offset; + lock_op.l_len = len; + int rc = fcntl(fd, cmd, &lock_op); + mdbx_jitter4testing(true); + if (rc != -1) { + if (cmd == op_getlk) { + /* Checks reader by pid. Returns: + * MDBX_RESULT_TRUE - if pid is live (reader holds a lock). + * MDBX_RESULT_FALSE - if pid is dead (a lock could be placed). */ + return (lock_op.l_type == F_UNLCK) ? MDBX_RESULT_FALSE + : MDBX_RESULT_TRUE; + } + return MDBX_SUCCESS; + } + rc = errno; + if (rc != EINTR || cmd == op_setlkw) { + mdbx_assert(nullptr, MDBX_IS_ERROR(rc)); + return rc; + } + } +} + +MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env) { + assert(env->me_lfd != INVALID_HANDLE_VALUE); + assert(env->me_pid > 0); + if (unlikely(mdbx_getpid() != env->me_pid)) + return MDBX_PANIC; + return lck_op(env->me_lfd, op_setlk, F_WRLCK, env->me_pid, 1); +} + +MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env) { + assert(env->me_lfd != INVALID_HANDLE_VALUE); + assert(env->me_pid > 0); + return lck_op(env->me_lfd, op_setlk, F_UNLCK, env->me_pid, 1); +} + +MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid) { + assert(env->me_lfd != INVALID_HANDLE_VALUE); + assert(pid > 0); + return lck_op(env->me_lfd, op_getlk, F_WRLCK, pid, 1); +} + +/*---------------------------------------------------------------------------*/ + +#if MDBX_LOCKING > MDBX_LOCKING_SYSV +MDBX_INTERNAL_FUNC int mdbx_ipclock_stub(mdbx_ipclock_t *ipc) { +#if MDBX_LOCKING == MDBX_LOCKING_POSIX1988 + return sem_init(ipc, false, 1) ? errno : 0; +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ + MDBX_LOCKING == MDBX_LOCKING_POSIX2008 + return pthread_mutex_init(ipc, nullptr); +#else +#error "FIXME" +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_ipclock_destroy(mdbx_ipclock_t *ipc) { +#if MDBX_LOCKING == MDBX_LOCKING_POSIX1988 + return sem_destroy(ipc) ? errno : 0; +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ + MDBX_LOCKING == MDBX_LOCKING_POSIX2008 + return pthread_mutex_destroy(ipc); +#else +#error "FIXME" +#endif +} +#endif /* MDBX_LOCKING > MDBX_LOCKING_SYSV */ + +static int check_fstat(MDBX_env *env) { + struct stat st; + + int rc = MDBX_SUCCESS; + if (fstat(env->me_lazy_fd, &st)) { + rc = errno; + mdbx_error("fstat(%s), err %d", "DXB", rc); + return rc; + } + + if (!S_ISREG(st.st_mode) || st.st_nlink < 1) { +#ifdef EBADFD + rc = EBADFD; +#else + rc = EPERM; +#endif + mdbx_error("%s %s, err %d", "DXB", + (st.st_nlink < 1) ? "file was removed" : "not a regular file", + rc); + return rc; + } + + if (st.st_size < (off_t)(MDBX_MIN_PAGESIZE * NUM_METAS)) { + mdbx_verbose("dxb-file is too short (%u), exclusive-lock needed", + (unsigned)st.st_size); + rc = MDBX_RESULT_TRUE; + } + + //---------------------------------------------------------------------------- + + if (fstat(env->me_lfd, &st)) { + rc = errno; + mdbx_error("fstat(%s), err %d", "LCK", rc); + return rc; + } + + if (!S_ISREG(st.st_mode) || st.st_nlink < 1) { +#ifdef EBADFD + rc = EBADFD; +#else + rc = EPERM; +#endif + mdbx_error("%s %s, err %d", "LCK", + (st.st_nlink < 1) ? "file was removed" : "not a regular file", + rc); + return rc; + } + + /* Checking file size for detect the situation when we got the shared lock + * immediately after mdbx_lck_destroy(). */ + if (st.st_size < (off_t)(sizeof(MDBX_lockinfo) + sizeof(MDBX_reader))) { + mdbx_verbose("lck-file is too short (%u), exclusive-lock needed", + (unsigned)st.st_size); + rc = MDBX_RESULT_TRUE; + } + + return rc; +} + +MDBX_INTERNAL_FUNC int __cold mdbx_lck_seize(MDBX_env *env) { + assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); + if (unlikely(mdbx_getpid() != env->me_pid)) + return MDBX_PANIC; +#if MDBX_USE_OFDLOCKS + if (unlikely(op_setlk == 0)) + choice_fcntl(); +#endif /* MDBX_USE_OFDLOCKS */ + + int rc = MDBX_SUCCESS; +#if defined(__linux__) || defined(__gnu_linux__) + if (unlikely(mdbx_RunningOnWSL)) { + rc = ENOLCK /* No record locks available */; + mdbx_error("%s, err %u", + "WSL (Windows Subsystem for Linux) is mad and trouble-full, " + "injecting failure to avoid data loss", + rc); + return rc; + } +#endif /* Linux */ + + if (env->me_lfd == INVALID_HANDLE_VALUE) { + /* LY: without-lck mode (e.g. exclusive or on read-only filesystem) */ + rc = + lck_op(env->me_lazy_fd, op_setlk, + (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, 0, OFF_T_MAX); + if (rc != MDBX_SUCCESS) { + mdbx_error("%s, err %u", "without-lck", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + return MDBX_RESULT_TRUE /* Done: return with exclusive locking. */; + } +#if defined(_POSIX_PRIORITY_SCHEDULING) && _POSIX_PRIORITY_SCHEDULING > 0 + sched_yield(); +#endif + +retry: + if (rc == MDBX_RESULT_TRUE) { + rc = lck_op(env->me_lfd, op_setlk, F_UNLCK, 0, 1); + if (rc != MDBX_SUCCESS) { + mdbx_error("%s, err %u", "unlock-before-retry", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + } + + /* Firstly try to get exclusive locking. */ + rc = lck_op(env->me_lfd, op_setlk, F_WRLCK, 0, 1); + if (rc == MDBX_SUCCESS) { + rc = check_fstat(env); + if (MDBX_IS_ERROR(rc)) + return rc; + + continue_dxb_exclusive: + rc = + lck_op(env->me_lazy_fd, op_setlk, + (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, 0, OFF_T_MAX); + if (rc == MDBX_SUCCESS) + return MDBX_RESULT_TRUE /* Done: return with exclusive locking. */; + + int err = check_fstat(env); + if (MDBX_IS_ERROR(err)) + return err; + + /* the cause may be a collision with POSIX's file-lock recovery. */ + if (!(rc == EAGAIN || rc == EACCES || rc == EBUSY || rc == EWOULDBLOCK || + rc == EDEADLK)) { + mdbx_error("%s, err %u", "dxb-exclusive", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + + /* Fallback to lck-shared */ + } else if (!(rc == EAGAIN || rc == EACCES || rc == EBUSY || + rc == EWOULDBLOCK || rc == EDEADLK)) { + mdbx_error("%s, err %u", "try-exclusive", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + + /* Here could be one of two: + * - mdbx_lck_destroy() from the another process was hold the lock + * during a destruction. + * - either mdbx_lck_seize() from the another process was got the exclusive + * lock and doing initialization. + * For distinguish these cases will use size of the lck-file later. */ + + /* Wait for lck-shared now. */ + /* Here may be await during transient processes, for instance until another + * competing process doesn't call lck_downgrade(). */ + rc = lck_op(env->me_lfd, op_setlkw, F_RDLCK, 0, 1); + if (rc != MDBX_SUCCESS) { + mdbx_error("%s, err %u", "try-shared", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + + rc = check_fstat(env); + if (rc == MDBX_RESULT_TRUE) + goto retry; + if (rc != MDBX_SUCCESS) { + mdbx_error("%s, err %u", "lck_fstat", rc); + return rc; + } + + /* got shared, retry exclusive */ + rc = lck_op(env->me_lfd, op_setlk, F_WRLCK, 0, 1); + if (rc == MDBX_SUCCESS) + goto continue_dxb_exclusive; + + if (!(rc == EAGAIN || rc == EACCES || rc == EBUSY || rc == EWOULDBLOCK || + rc == EDEADLK)) { + mdbx_error("%s, err %u", "try-exclusive", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + + /* Lock against another process operating in without-lck or exclusive mode. */ + rc = + lck_op(env->me_lazy_fd, op_setlk, + (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, env->me_pid, 1); + if (rc != MDBX_SUCCESS) { + mdbx_error("%s, err %u", "lock-against-without-lck", rc); + mdbx_assert(env, MDBX_IS_ERROR(rc)); + return rc; + } + + /* Done: return with shared locking. */ + return MDBX_RESULT_FALSE; +} + +MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env) { + assert(env->me_lfd != INVALID_HANDLE_VALUE); + if (unlikely(mdbx_getpid() != env->me_pid)) + return MDBX_PANIC; + + int rc = MDBX_SUCCESS; + if ((env->me_flags & MDBX_EXCLUSIVE) == 0) { + rc = lck_op(env->me_lazy_fd, op_setlk, F_UNLCK, 0, env->me_pid); + if (rc == MDBX_SUCCESS) + rc = lck_op(env->me_lazy_fd, op_setlk, F_UNLCK, env->me_pid + 1, + OFF_T_MAX - env->me_pid - 1); + } + if (rc == MDBX_SUCCESS) + rc = lck_op(env->me_lfd, op_setlk, F_RDLCK, 0, 1); + if (unlikely(rc != 0)) { + mdbx_error("%s, err %u", "lck", rc); + assert(MDBX_IS_ERROR(rc)); + } + return rc; +} + +MDBX_INTERNAL_FUNC int __cold mdbx_lck_destroy(MDBX_env *env, + MDBX_env *inprocess_neighbor) { + if (unlikely(mdbx_getpid() != env->me_pid)) + return MDBX_PANIC; + + int rc = MDBX_SUCCESS; + struct stat lck_info; + if (env->me_lfd != INVALID_HANDLE_VALUE && !inprocess_neighbor && + env->me_lck && + /* try get exclusive access */ + lck_op(env->me_lfd, op_setlk, F_WRLCK, 0, OFF_T_MAX) == 0 && + /* if LCK was not removed */ + fstat(env->me_lfd, &lck_info) == 0 && lck_info.st_nlink > 0 && + lck_op(env->me_lazy_fd, op_setlk, + (env->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, 0, + OFF_T_MAX) == 0) { + + mdbx_verbose("%p got exclusive, drown locks", (void *)env); +#if MDBX_LOCKING == MDBX_LOCKING_SYSV + if (env->me_sysv_ipc.semid != -1) + rc = semctl(env->me_sysv_ipc.semid, 2, IPC_RMID) ? errno : 0; +#else + rc = mdbx_ipclock_destroy(&env->me_lck->mti_rlock); + if (rc == 0) + rc = mdbx_ipclock_destroy(&env->me_lck->mti_wlock); +#endif /* MDBX_LOCKING */ + + mdbx_assert(env, rc == 0); + if (rc == 0) { + mdbx_munmap(&env->me_lck_mmap); + rc = ftruncate(env->me_lfd, 0) ? errno : 0; + } + + mdbx_jitter4testing(false); + } + + /* 1) POSIX's fcntl() locks (i.e. when op_setlk == F_SETLK) should be restored + * after file was closed. + * + * 2) File locks would be released (by kernel) while the file-descriptors will + * be closed. But to avoid false-positive EACCESS and EDEADLK from the kernel, + * locks should be released here explicitly with properly order. */ + + /* close dxb and restore lock */ + if (env->me_dsync_fd != INVALID_HANDLE_VALUE) { + if (unlikely(close(env->me_dsync_fd) != 0) && rc == MDBX_SUCCESS) + rc = errno; + env->me_dsync_fd = INVALID_HANDLE_VALUE; + } + if (env->me_lazy_fd != INVALID_HANDLE_VALUE) { + if (unlikely(close(env->me_lazy_fd) != 0) && rc == MDBX_SUCCESS) + rc = errno; + env->me_lazy_fd = INVALID_HANDLE_VALUE; + if (op_setlk == F_SETLK && inprocess_neighbor && rc == MDBX_SUCCESS) { + /* restore file-lock */ + rc = lck_op( + inprocess_neighbor->me_lazy_fd, F_SETLKW, + (inprocess_neighbor->me_flags & MDBX_RDONLY) ? F_RDLCK : F_WRLCK, + (inprocess_neighbor->me_flags & MDBX_EXCLUSIVE) + ? 0 + : inprocess_neighbor->me_pid, + (inprocess_neighbor->me_flags & MDBX_EXCLUSIVE) ? OFF_T_MAX : 1); + } + } + + /* close clk and restore locks */ + if (env->me_lfd != INVALID_HANDLE_VALUE) { + if (unlikely(close(env->me_lfd) != 0) && rc == MDBX_SUCCESS) + rc = errno; + env->me_lfd = INVALID_HANDLE_VALUE; + if (op_setlk == F_SETLK && inprocess_neighbor && rc == MDBX_SUCCESS) { + /* restore file-locks */ + rc = lck_op(inprocess_neighbor->me_lfd, F_SETLKW, F_RDLCK, 0, 1); + if (rc == MDBX_SUCCESS && inprocess_neighbor->me_live_reader) + rc = mdbx_rpid_set(inprocess_neighbor); + } + } + + if (inprocess_neighbor && rc != MDBX_SUCCESS) + inprocess_neighbor->me_flags |= MDBX_FATAL_ERROR; + return rc; +} + +/*---------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC int __cold mdbx_lck_init(MDBX_env *env, + MDBX_env *inprocess_neighbor, + int global_uniqueness_flag) { + if (inprocess_neighbor) + return MDBX_SUCCESS /* currently don't need any initialization + if LCK already opened/used inside current process */ + ; +#if MDBX_LOCKING == MDBX_LOCKING_SYSV + int semid = -1; + if (global_uniqueness_flag) { + struct stat st; + if (fstat(env->me_lazy_fd, &st)) + return errno; + sysv_retry_create: + semid = semget(env->me_sysv_ipc.key, 2, + IPC_CREAT | IPC_EXCL | + (st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO))); + if (unlikely(semid == -1)) { + int err = errno; + if (err != EEXIST) + return err; + + /* remove and re-create semaphore set */ + semid = semget(env->me_sysv_ipc.key, 2, 0); + if (semid == -1) { + err = errno; + if (err != ENOENT) + return err; + goto sysv_retry_create; + } + if (semctl(semid, 2, IPC_RMID)) { + err = errno; + if (err != EIDRM) + return err; + } + goto sysv_retry_create; + } + + unsigned short val_array[2] = {1, 1}; + if (semctl(semid, 2, SETALL, val_array)) + return errno; + } else { + semid = semget(env->me_sysv_ipc.key, 2, 0); + if (semid == -1) + return errno; + + /* check read & write access */ + struct semid_ds data[2]; + if (semctl(semid, 2, IPC_STAT, data) || semctl(semid, 2, IPC_SET, data)) + return errno; + } + + env->me_sysv_ipc.semid = semid; + + return MDBX_SUCCESS; + +#elif MDBX_LOCKING == MDBX_LOCKING_FUTEX +#warning "TODO" +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 + + /* don't initialize semaphores twice */ + if (global_uniqueness_flag == MDBX_RESULT_TRUE) { + if (sem_init(&env->me_lck->mti_rlock, true, 1)) + return errno; + if (sem_init(&env->me_lck->mti_wlock, true, 1)) + return errno; + } + return MDBX_SUCCESS; + +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ + MDBX_LOCKING == MDBX_LOCKING_POSIX2008 + + /* FIXME: Unfortunately, there is no other reliable way but to long testing + * on each platform. On the other hand, behavior like FreeBSD is incorrect + * and we can expect it to be rare. Moreover, even on FreeBSD without + * additional in-process initialization, the probability of an problem + * occurring is vanishingly small, and the symptom is a return of EINVAL + * while locking a mutex. In other words, in the worst case, the problem + * results in an EINVAL error at the start of the transaction, but NOT data + * loss, nor database corruption, nor other fatal troubles. Thus, the code + * below I am inclined to think the workaround for erroneous platforms (like + * FreeBSD), rather than a defect of libmdbx. */ +#if defined(__FreeBSD__) + /* seems that shared mutexes on FreeBSD required in-process initialization */ + (void)global_uniqueness_flag; +#else + /* shared mutexes on many other platforms (including Darwin and Linux's + * futexes) doesn't need any addition in-process initialization */ + if (global_uniqueness_flag != MDBX_RESULT_TRUE) + return MDBX_SUCCESS; +#endif + + pthread_mutexattr_t ma; + int rc = pthread_mutexattr_init(&ma); + if (rc) + return rc; + + rc = pthread_mutexattr_setpshared(&ma, PTHREAD_PROCESS_SHARED); + if (rc) + goto bailout; + +#if MDBX_LOCKING == MDBX_LOCKING_POSIX2008 +#if defined(PTHREAD_MUTEX_ROBUST) || defined(pthread_mutexattr_setrobust) + rc = pthread_mutexattr_setrobust(&ma, PTHREAD_MUTEX_ROBUST); +#elif defined(PTHREAD_MUTEX_ROBUST_NP) || \ + defined(pthread_mutexattr_setrobust_np) + rc = pthread_mutexattr_setrobust_np(&ma, PTHREAD_MUTEX_ROBUST_NP); +#elif _POSIX_THREAD_PROCESS_SHARED < 200809L + rc = pthread_mutexattr_setrobust_np(&ma, PTHREAD_MUTEX_ROBUST_NP); +#else + rc = pthread_mutexattr_setrobust(&ma, PTHREAD_MUTEX_ROBUST); +#endif + if (rc) + goto bailout; +#endif /* MDBX_LOCKING == MDBX_LOCKING_POSIX2008 */ + +#if defined(_POSIX_THREAD_PRIO_INHERIT) && _POSIX_THREAD_PRIO_INHERIT >= 0 && \ + !defined(MDBX_SAFE4QEMU) + rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT); + if (rc == ENOTSUP) + rc = pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_NONE); + if (rc && rc != ENOTSUP) + goto bailout; +#endif /* PTHREAD_PRIO_INHERIT */ + + rc = pthread_mutexattr_settype(&ma, PTHREAD_MUTEX_ERRORCHECK); + if (rc && rc != ENOTSUP) + goto bailout; + + rc = pthread_mutex_init(&env->me_lck->mti_rlock, &ma); + if (rc) + goto bailout; + rc = pthread_mutex_init(&env->me_lck->mti_wlock, &ma); + +bailout: + pthread_mutexattr_destroy(&ma); + return rc; +#else +#error "FIXME" +#endif /* MDBX_LOCKING > 0 */ +} + +static int __cold mdbx_ipclock_failed(MDBX_env *env, mdbx_ipclock_t *ipc, + const int err) { + int rc = err; +#if MDBX_LOCKING == MDBX_LOCKING_POSIX2008 || MDBX_LOCKING == MDBX_LOCKING_SYSV + if (err == EOWNERDEAD) { + /* We own the mutex. Clean up after dead previous owner. */ + + const bool rlocked = (env->me_lck && ipc == &env->me_lck->mti_rlock); + rc = MDBX_SUCCESS; + if (!rlocked) { + if (unlikely(env->me_txn)) { + /* env is hosed if the dead thread was ours */ + env->me_flags |= MDBX_FATAL_ERROR; + env->me_txn = NULL; + rc = MDBX_PANIC; + } + } + mdbx_notice("%clock owner died, %s", (rlocked ? 'r' : 'w'), + (rc ? "this process' env is hosed" : "recovering")); + + int check_rc = mdbx_reader_check0(env, rlocked, NULL); + check_rc = (check_rc == MDBX_SUCCESS) ? MDBX_RESULT_TRUE : check_rc; + +#if MDBX_LOCKING == MDBX_LOCKING_SYSV + rc = (rc == MDBX_SUCCESS) ? check_rc : rc; +#else +#if defined(PTHREAD_MUTEX_ROBUST) || defined(pthread_mutex_consistent) + int mreco_rc = pthread_mutex_consistent(ipc); +#elif defined(PTHREAD_MUTEX_ROBUST_NP) || defined(pthread_mutex_consistent_np) + int mreco_rc = pthread_mutex_consistent_np(ipc); +#elif _POSIX_THREAD_PROCESS_SHARED < 200809L + int mreco_rc = pthread_mutex_consistent_np(ipc); +#else + int mreco_rc = pthread_mutex_consistent(ipc); +#endif + check_rc = (mreco_rc == 0) ? check_rc : mreco_rc; + + if (unlikely(mreco_rc)) + mdbx_error("lock recovery failed, %s", mdbx_strerror(mreco_rc)); + + rc = (rc == MDBX_SUCCESS) ? check_rc : rc; + if (MDBX_IS_ERROR(rc)) + pthread_mutex_unlock(ipc); +#endif /* MDBX_LOCKING == MDBX_LOCKING_POSIX2008 */ + return rc; + } +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX2001 + (void)ipc; +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 + (void)ipc; +#elif MDBX_LOCKING == MDBX_LOCKING_FUTEX +#warning "TODO" + (void)ipc; +#else +#error "FIXME" +#endif /* MDBX_LOCKING */ + + mdbx_error("mutex (un)lock failed, %s", mdbx_strerror(err)); + if (rc != EDEADLK) + env->me_flags |= MDBX_FATAL_ERROR; + return rc; +} + +static int mdbx_ipclock_lock(MDBX_env *env, mdbx_ipclock_t *ipc, + const bool dont_wait) { +#if MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ + MDBX_LOCKING == MDBX_LOCKING_POSIX2008 + int rc = dont_wait ? pthread_mutex_trylock(ipc) : pthread_mutex_lock(ipc); + rc = (rc == EBUSY && dont_wait) ? MDBX_BUSY : rc; +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 + int rc = MDBX_SUCCESS; + if (dont_wait) { + if (sem_trywait(ipc)) { + rc = errno; + if (rc == EAGAIN) + rc = MDBX_BUSY; + } + } else if (sem_wait(ipc)) + rc = errno; +#elif MDBX_LOCKING == MDBX_LOCKING_SYSV + struct sembuf op = {.sem_num = (ipc != env->me_wlock), + .sem_op = -1, + .sem_flg = dont_wait ? IPC_NOWAIT | SEM_UNDO : SEM_UNDO}; + int rc; + if (semop(env->me_sysv_ipc.semid, &op, 1)) { + rc = errno; + if (dont_wait && rc == EAGAIN) + rc = MDBX_BUSY; + } else { + rc = *ipc ? EOWNERDEAD : MDBX_SUCCESS; + *ipc = env->me_pid; + } +#else +#error "FIXME" +#endif /* MDBX_LOCKING */ + + if (unlikely(rc != MDBX_SUCCESS && rc != MDBX_BUSY)) + rc = mdbx_ipclock_failed(env, ipc, rc); + return rc; +} + +static int mdbx_ipclock_unlock(MDBX_env *env, mdbx_ipclock_t *ipc) { +#if MDBX_LOCKING == MDBX_LOCKING_POSIX2001 || \ + MDBX_LOCKING == MDBX_LOCKING_POSIX2008 + int rc = pthread_mutex_unlock(ipc); + (void)env; +#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 + int rc = sem_post(ipc) ? errno : MDBX_SUCCESS; + (void)env; +#elif MDBX_LOCKING == MDBX_LOCKING_SYSV + if (unlikely(*ipc != (pid_t)env->me_pid)) + return EPERM; + *ipc = 0; + struct sembuf op = { + .sem_num = (ipc != env->me_wlock), .sem_op = 1, .sem_flg = SEM_UNDO}; + int rc = semop(env->me_sysv_ipc.semid, &op, 1) ? errno : MDBX_SUCCESS; +#else +#error "FIXME" +#endif /* MDBX_LOCKING */ + return rc; +} + +MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env) { + mdbx_trace("%s", ">>"); + mdbx_jitter4testing(true); + int rc = mdbx_ipclock_lock(env, &env->me_lck->mti_rlock, false); + mdbx_trace("<< rc %d", rc); + return rc; +} + +MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env) { + mdbx_trace("%s", ">>"); + int rc = mdbx_ipclock_unlock(env, &env->me_lck->mti_rlock); + mdbx_trace("<< rc %d", rc); + if (unlikely(rc != MDBX_SUCCESS)) + mdbx_panic("%s() failed: err %d\n", __func__, rc); + mdbx_jitter4testing(true); +} + +int mdbx_txn_lock(MDBX_env *env, bool dont_wait) { + mdbx_trace("%swait %s", dont_wait ? "dont-" : "", ">>"); + mdbx_jitter4testing(true); + int rc = mdbx_ipclock_lock(env, env->me_wlock, dont_wait); + mdbx_trace("<< rc %d", rc); + return MDBX_IS_ERROR(rc) ? rc : MDBX_SUCCESS; +} + +void mdbx_txn_unlock(MDBX_env *env) { + mdbx_trace("%s", ">>"); + int rc = mdbx_ipclock_unlock(env, env->me_wlock); + mdbx_trace("<< rc %d", rc); + if (unlikely(rc != MDBX_SUCCESS)) + mdbx_panic("%s() failed: err %d\n", __func__, rc); + mdbx_jitter4testing(true); +} + +#else +#ifdef _MSC_VER +#pragma warning(disable : 4206) /* nonstandard extension used: translation \ + unit is empty */ +#endif /* _MSC_VER (warnings) */ +#endif /* !Windows LCK-implementation */ diff --git a/libs/libmdbx/src/src/lck-windows.c b/libs/libmdbx/src/src/lck-windows.c new file mode 100644 index 0000000000..19a71cc337 --- /dev/null +++ b/libs/libmdbx/src/src/lck-windows.c @@ -0,0 +1,801 @@ +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + */ + +#if defined(_WIN32) || defined(_WIN64) /* Windows LCK-implementation */ + +/* PREAMBLE FOR WINDOWS: + * + * We are not concerned for performance here. + * If you are running Windows a performance could NOT be the goal. + * Otherwise please use Linux. */ + +#include "internals.h" + +static void mdbx_winnt_import(void); + +#if MDBX_BUILD_SHARED_LIBRARY +#if MDBX_AVOID_CRT && defined(NDEBUG) +/* DEBUG/CHECKED builds still require MSVC's CRT for runtime checks. + * + * Define dll's entry point only for Release build when NDEBUG is defined and + * MDBX_AVOID_CRT=ON. if the entry point isn't defined then MSVC's will + * automatically use DllMainCRTStartup() from CRT library, which also + * automatically call DllMain() from our mdbx.dll */ +#pragma comment(linker, "/ENTRY:DllMain") +#endif /* MDBX_AVOID_CRT */ + +BOOL APIENTRY DllMain(HANDLE module, DWORD reason, LPVOID reserved) +#else +#if !MDBX_CONFIG_MANUAL_TLS_CALLBACK +static +#endif /* !MDBX_CONFIG_MANUAL_TLS_CALLBACK */ + void NTAPI + mdbx_dll_handler(PVOID module, DWORD reason, PVOID reserved) +#endif /* MDBX_BUILD_SHARED_LIBRARY */ +{ + (void)reserved; + switch (reason) { + case DLL_PROCESS_ATTACH: + mdbx_winnt_import(); + mdbx_rthc_global_init(); + break; + case DLL_PROCESS_DETACH: + mdbx_rthc_global_dtor(); + break; + + case DLL_THREAD_ATTACH: + break; + case DLL_THREAD_DETACH: + mdbx_rthc_thread_dtor(module); + break; + } +#if MDBX_BUILD_SHARED_LIBRARY + return TRUE; +#endif +} + +#if !MDBX_BUILD_SHARED_LIBRARY && !MDBX_CONFIG_MANUAL_TLS_CALLBACK +/* *INDENT-OFF* */ +/* clang-format off */ +#if defined(_MSC_VER) +# pragma const_seg(push) +# pragma data_seg(push) + +# ifdef _WIN64 + /* kick a linker to create the TLS directory if not already done */ +# pragma comment(linker, "/INCLUDE:_tls_used") + /* Force some symbol references. */ +# pragma comment(linker, "/INCLUDE:mdbx_tls_anchor") + /* specific const-segment for WIN64 */ +# pragma const_seg(".CRT$XLB") + const +# else + /* kick a linker to create the TLS directory if not already done */ +# pragma comment(linker, "/INCLUDE:__tls_used") + /* Force some symbol references. */ +# pragma comment(linker, "/INCLUDE:_mdbx_tls_anchor") + /* specific data-segment for WIN32 */ +# pragma data_seg(".CRT$XLB") +# endif + + __declspec(allocate(".CRT$XLB")) PIMAGE_TLS_CALLBACK mdbx_tls_anchor = mdbx_dll_handler; +# pragma data_seg(pop) +# pragma const_seg(pop) + +#elif defined(__GNUC__) +# ifdef _WIN64 + const +# endif + PIMAGE_TLS_CALLBACK mdbx_tls_anchor __attribute__((__section__(".CRT$XLB"), used)) = mdbx_dll_handler; +#else +# error FIXME +#endif +/* *INDENT-ON* */ +/* clang-format on */ +#endif /* !MDBX_BUILD_SHARED_LIBRARY && !MDBX_CONFIG_MANUAL_TLS_CALLBACK */ + +/*----------------------------------------------------------------------------*/ + +#define LCK_SHARED 0 +#define LCK_EXCLUSIVE LOCKFILE_EXCLUSIVE_LOCK +#define LCK_WAITFOR 0 +#define LCK_DONTWAIT LOCKFILE_FAIL_IMMEDIATELY + +static __inline BOOL flock(mdbx_filehandle_t fd, DWORD flags, uint64_t offset, + size_t bytes) { + OVERLAPPED ov; + ov.hEvent = 0; + ov.Offset = (DWORD)offset; + ov.OffsetHigh = HIGH_DWORD(offset); + return LockFileEx(fd, flags, 0, (DWORD)bytes, HIGH_DWORD(bytes), &ov); +} + +static __inline BOOL funlock(mdbx_filehandle_t fd, uint64_t offset, + size_t bytes) { + return UnlockFile(fd, (DWORD)offset, HIGH_DWORD(offset), (DWORD)bytes, + HIGH_DWORD(bytes)); +} + +/*----------------------------------------------------------------------------*/ +/* global `write` lock for write-txt processing, + * exclusive locking both meta-pages) */ + +#define LCK_MAXLEN (1u + (size_t)(MAXSSIZE_T)) +#define LCK_META_OFFSET 0 +#define LCK_META_LEN 0x10000u +#define LCK_BODY_OFFSET LCK_META_LEN +#define LCK_BODY_LEN (LCK_MAXLEN - LCK_BODY_OFFSET) +#define LCK_META LCK_META_OFFSET, LCK_META_LEN +#define LCK_BODY LCK_BODY_OFFSET, LCK_BODY_LEN +#define LCK_WHOLE 0, LCK_MAXLEN + +int mdbx_txn_lock(MDBX_env *env, bool dontwait) { + if (dontwait) { + if (!TryEnterCriticalSection(&env->me_windowsbug_lock)) + return MDBX_BUSY; + } else { + EnterCriticalSection(&env->me_windowsbug_lock); + } + + if ((env->me_flags & MDBX_EXCLUSIVE) || + flock(env->me_lazy_fd, + dontwait ? (LCK_EXCLUSIVE | LCK_DONTWAIT) + : (LCK_EXCLUSIVE | LCK_WAITFOR), + LCK_BODY)) + return MDBX_SUCCESS; + int rc = GetLastError(); + LeaveCriticalSection(&env->me_windowsbug_lock); + return (!dontwait || rc != ERROR_LOCK_VIOLATION) ? rc : MDBX_BUSY; +} + +void mdbx_txn_unlock(MDBX_env *env) { + int rc = (env->me_flags & MDBX_EXCLUSIVE) + ? TRUE + : funlock(env->me_lazy_fd, LCK_BODY); + LeaveCriticalSection(&env->me_windowsbug_lock); + if (!rc) + mdbx_panic("%s failed: err %u", __func__, GetLastError()); +} + +/*----------------------------------------------------------------------------*/ +/* global `read` lock for readers registration, + * exclusive locking `mti_numreaders` (second) cacheline */ + +#define LCK_LO_OFFSET 0 +#define LCK_LO_LEN offsetof(MDBX_lockinfo, mti_numreaders) +#define LCK_UP_OFFSET LCK_LO_LEN +#define LCK_UP_LEN (sizeof(MDBX_lockinfo) - LCK_UP_OFFSET) +#define LCK_LOWER LCK_LO_OFFSET, LCK_LO_LEN +#define LCK_UPPER LCK_UP_OFFSET, LCK_UP_LEN + +MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env) { + mdbx_srwlock_AcquireShared(&env->me_remap_guard); + if (env->me_lfd == INVALID_HANDLE_VALUE) + return MDBX_SUCCESS; /* readonly database in readonly filesystem */ + + /* transite from S-? (used) to S-E (locked), e.g. exclusive lock upper-part */ + if ((env->me_flags & MDBX_EXCLUSIVE) || + flock(env->me_lfd, LCK_EXCLUSIVE | LCK_WAITFOR, LCK_UPPER)) + return MDBX_SUCCESS; + + int rc = GetLastError(); + mdbx_srwlock_ReleaseShared(&env->me_remap_guard); + return rc; +} + +MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env) { + if (env->me_lfd != INVALID_HANDLE_VALUE) { + /* transite from S-E (locked) to S-? (used), e.g. unlock upper-part */ + if ((env->me_flags & MDBX_EXCLUSIVE) == 0 && + !funlock(env->me_lfd, LCK_UPPER)) + mdbx_panic("%s failed: err %u", __func__, GetLastError()); + } + mdbx_srwlock_ReleaseShared(&env->me_remap_guard); +} + +static int suspend_and_append(mdbx_handle_array_t **array, + const DWORD ThreadId) { + const unsigned limit = (*array)->limit; + if ((*array)->count == limit) { + void *ptr = mdbx_realloc( + (limit > ARRAY_LENGTH((*array)->handles)) + ? *array + : /* don't free initial array on the stack */ NULL, + sizeof(mdbx_handle_array_t) + + sizeof(HANDLE) * (limit * 2 - ARRAY_LENGTH((*array)->handles))); + if (!ptr) + return MDBX_ENOMEM; + if (limit == ARRAY_LENGTH((*array)->handles)) + memcpy(ptr, *array, sizeof(mdbx_handle_array_t)); + *array = (mdbx_handle_array_t *)ptr; + (*array)->limit = limit * 2; + } + + HANDLE hThread = OpenThread(THREAD_SUSPEND_RESUME | THREAD_QUERY_INFORMATION, + FALSE, ThreadId); + if (hThread == NULL) + return GetLastError(); + + if (SuspendThread(hThread) == -1) { + int err = GetLastError(); + DWORD ExitCode; + if (err == /* workaround for Win10 UCRT bug */ ERROR_ACCESS_DENIED || + !GetExitCodeThread(hThread, &ExitCode) || ExitCode != STILL_ACTIVE) + err = MDBX_SUCCESS; + CloseHandle(hThread); + return err; + } + + (*array)->handles[(*array)->count++] = hThread; + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int +mdbx_suspend_threads_before_remap(MDBX_env *env, mdbx_handle_array_t **array) { + const uintptr_t CurrentTid = GetCurrentThreadId(); + int rc; + if (env->me_lck) { + /* Scan LCK for threads of the current process */ + const MDBX_reader *const begin = env->me_lck->mti_readers; + const MDBX_reader *const end = begin + env->me_lck->mti_numreaders; + const uintptr_t WriteTxnOwner = env->me_txn0 ? env->me_txn0->mt_owner : 0; + for (const MDBX_reader *reader = begin; reader < end; ++reader) { + if (reader->mr_pid != env->me_pid || !reader->mr_tid) { + skip_lck: + continue; + } + if (reader->mr_tid == CurrentTid || reader->mr_tid == WriteTxnOwner) + goto skip_lck; + if (env->me_flags & MDBX_NOTLS) { + /* Skip duplicates in no-tls mode */ + for (const MDBX_reader *scan = reader; --scan >= begin;) + if (scan->mr_tid == reader->mr_tid) + goto skip_lck; + } + + rc = suspend_and_append(array, (mdbx_tid_t)reader->mr_tid); + if (rc != MDBX_SUCCESS) { + bailout_lck: + (void)mdbx_resume_threads_after_remap(*array); + return rc; + } + } + if (WriteTxnOwner && WriteTxnOwner != CurrentTid) { + rc = suspend_and_append(array, (mdbx_tid_t)WriteTxnOwner); + if (rc != MDBX_SUCCESS) + goto bailout_lck; + } + } else { + /* Without LCK (i.e. read-only mode). + * Walk thougth a snapshot of all running threads */ + mdbx_assert(env, + env->me_txn0 == NULL || (env->me_flags & MDBX_EXCLUSIVE) != 0); + const HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0); + if (hSnapshot == INVALID_HANDLE_VALUE) + return GetLastError(); + + THREADENTRY32 entry; + entry.dwSize = sizeof(THREADENTRY32); + + if (!Thread32First(hSnapshot, &entry)) { + rc = GetLastError(); + bailout_toolhelp: + CloseHandle(hSnapshot); + (void)mdbx_resume_threads_after_remap(*array); + return rc; + } + + do { + if (entry.th32OwnerProcessID != env->me_pid || + entry.th32ThreadID == CurrentTid) + continue; + + rc = suspend_and_append(array, entry.th32ThreadID); + if (rc != MDBX_SUCCESS) + goto bailout_toolhelp; + + } while (Thread32Next(hSnapshot, &entry)); + + rc = GetLastError(); + if (rc != ERROR_NO_MORE_FILES) + goto bailout_toolhelp; + CloseHandle(hSnapshot); + } + + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int +mdbx_resume_threads_after_remap(mdbx_handle_array_t *array) { + int rc = MDBX_SUCCESS; + for (unsigned i = 0; i < array->count; ++i) { + const HANDLE hThread = array->handles[i]; + if (ResumeThread(hThread) == -1) { + const int err = GetLastError(); + DWORD ExitCode; + if (err != /* workaround for Win10 UCRT bug */ ERROR_ACCESS_DENIED && + GetExitCodeThread(hThread, &ExitCode) && ExitCode == STILL_ACTIVE) + rc = err; + } + CloseHandle(hThread); + } + return rc; +} + +/*----------------------------------------------------------------------------*/ +/* global `initial` lock for lockfile initialization, + * exclusive/shared locking first cacheline */ + +/* Briefly descritpion of locking schema/algorithm: + * - Windows does not support upgrading or downgrading for file locking. + * - Therefore upgrading/downgrading is emulated by shared and exclusive + * locking of upper and lower halves. + * - In other words, we have FSM with possible 9 states, + * i.e. free/shared/exclusive x free/shared/exclusive == 9. + * Only 6 states of FSM are used, which 2 of ones are transitive. + * + * The mdbx_lck_seize() moves the locking-FSM from the initial free/unlocked + * state to the "exclusive write" (and returns MDBX_RESULT_TRUE) if possible, + * or to the "used" (and returns MDBX_RESULT_FALSE). + * + * The mdbx_lck_downgrade() moves the locking-FSM from "exclusive write" + * state to the "used" (i.e. shared) state. + * + * States: + * ?-? = free, i.e. unlocked + * S-? = used, i.e. shared lock + * E-? = exclusive-read, i.e. operational exclusive + * ?-S + * ?-E = middle (transitive state) + * S-S + * S-E = locked (transitive state) + * E-S + * E-E = exclusive-write, i.e. exclusive due (re)initialization + */ + +static void lck_unlock(MDBX_env *env) { + int err; + + if (env->me_lfd != INVALID_HANDLE_VALUE) { + /* double `unlock` for robustly remove overlapped shared/exclusive locks */ + while (funlock(env->me_lfd, LCK_LOWER)) + ; + err = GetLastError(); + assert(err == ERROR_NOT_LOCKED || + (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); + (void)err; + SetLastError(ERROR_SUCCESS); + + while (funlock(env->me_lfd, LCK_UPPER)) + ; + err = GetLastError(); + assert(err == ERROR_NOT_LOCKED || + (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); + (void)err; + SetLastError(ERROR_SUCCESS); + } + + if (env->me_lazy_fd != INVALID_HANDLE_VALUE) { + /* explicitly unlock to avoid latency for other processes (windows kernel + * releases such locks via deferred queues) */ + while (funlock(env->me_lazy_fd, LCK_BODY)) + ; + err = GetLastError(); + assert(err == ERROR_NOT_LOCKED || + (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); + (void)err; + SetLastError(ERROR_SUCCESS); + + while (funlock(env->me_lazy_fd, LCK_META)) + ; + err = GetLastError(); + assert(err == ERROR_NOT_LOCKED || + (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); + (void)err; + SetLastError(ERROR_SUCCESS); + + while (funlock(env->me_lazy_fd, LCK_WHOLE)) + ; + err = GetLastError(); + assert(err == ERROR_NOT_LOCKED || + (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); + (void)err; + SetLastError(ERROR_SUCCESS); + } +} + +MDBX_INTERNAL_FUNC int mdbx_lck_init(MDBX_env *env, + MDBX_env *inprocess_neighbor, + int global_uniqueness_flag) { + (void)env; + (void)inprocess_neighbor; + (void)global_uniqueness_flag; + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_lck_destroy(MDBX_env *env, + MDBX_env *inprocess_neighbor) { + (void)inprocess_neighbor; + + /* LY: should unmap before releasing the locks to avoid race condition and + * STATUS_USER_MAPPED_FILE/ERROR_USER_MAPPED_FILE */ + if (env->me_map) + mdbx_munmap(&env->me_dxb_mmap); + if (env->me_lck) + mdbx_munmap(&env->me_lck_mmap); + + lck_unlock(env); + return MDBX_SUCCESS; +} + +/* Seize state as 'exclusive-write' (E-E and returns MDBX_RESULT_TRUE) + * or as 'used' (S-? and returns MDBX_RESULT_FALSE). + * Oherwise returns an error. */ +static int internal_seize_lck(HANDLE lfd) { + int rc; + assert(lfd != INVALID_HANDLE_VALUE); + + /* 1) now on ?-? (free), get ?-E (middle) */ + mdbx_jitter4testing(false); + if (!flock(lfd, LCK_EXCLUSIVE | LCK_WAITFOR, LCK_UPPER)) { + rc = GetLastError() /* 2) something went wrong, give up */; + mdbx_error("%s, err %u", "?-?(free) >> ?-E(middle)", rc); + return rc; + } + + /* 3) now on ?-E (middle), try E-E (exclusive-write) */ + mdbx_jitter4testing(false); + if (flock(lfd, LCK_EXCLUSIVE | LCK_DONTWAIT, LCK_LOWER)) + return MDBX_RESULT_TRUE /* 4) got E-E (exclusive-write), done */; + + /* 5) still on ?-E (middle) */ + rc = GetLastError(); + mdbx_jitter4testing(false); + if (rc != ERROR_SHARING_VIOLATION && rc != ERROR_LOCK_VIOLATION) { + /* 6) something went wrong, give up */ + if (!funlock(lfd, LCK_UPPER)) + mdbx_panic("%s(%s) failed: err %u", __func__, "?-E(middle) >> ?-?(free)", + GetLastError()); + return rc; + } + + /* 7) still on ?-E (middle), try S-E (locked) */ + mdbx_jitter4testing(false); + rc = flock(lfd, LCK_SHARED | LCK_DONTWAIT, LCK_LOWER) ? MDBX_RESULT_FALSE + : GetLastError(); + + mdbx_jitter4testing(false); + if (rc != MDBX_RESULT_FALSE) + mdbx_error("%s, err %u", "?-E(middle) >> S-E(locked)", rc); + + /* 8) now on S-E (locked) or still on ?-E (middle), + * transite to S-? (used) or ?-? (free) */ + if (!funlock(lfd, LCK_UPPER)) + mdbx_panic("%s(%s) failed: err %u", __func__, + "X-E(locked/middle) >> X-?(used/free)", GetLastError()); + + /* 9) now on S-? (used, DONE) or ?-? (free, FAILURE) */ + return rc; +} + +MDBX_INTERNAL_FUNC int mdbx_lck_seize(MDBX_env *env) { + int rc; + + assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); + if (env->me_flags & MDBX_EXCLUSIVE) + return MDBX_RESULT_TRUE /* nope since files were must be opened + non-shareable */ + ; + + if (env->me_lfd == INVALID_HANDLE_VALUE) { + /* LY: without-lck mode (e.g. on read-only filesystem) */ + mdbx_jitter4testing(false); + if (!flock(env->me_lazy_fd, LCK_SHARED | LCK_DONTWAIT, LCK_WHOLE)) { + rc = GetLastError(); + mdbx_error("%s, err %u", "without-lck", rc); + return rc; + } + return MDBX_RESULT_FALSE; + } + + rc = internal_seize_lck(env->me_lfd); + mdbx_jitter4testing(false); + if (rc == MDBX_RESULT_TRUE && (env->me_flags & MDBX_RDONLY) == 0) { + /* Check that another process don't operates in without-lck mode. + * Doing such check by exclusive locking the body-part of db. Should be + * noted: + * - we need an exclusive lock for do so; + * - we can't lock meta-pages, otherwise other process could get an error + * while opening db in valid (non-conflict) mode. */ + if (!flock(env->me_lazy_fd, LCK_EXCLUSIVE | LCK_DONTWAIT, LCK_BODY)) { + rc = GetLastError(); + mdbx_error("%s, err %u", "lock-against-without-lck", rc); + mdbx_jitter4testing(false); + lck_unlock(env); + } else { + mdbx_jitter4testing(false); + if (!funlock(env->me_lazy_fd, LCK_BODY)) + mdbx_panic("%s(%s) failed: err %u", __func__, + "unlock-against-without-lck", GetLastError()); + } + } + + return rc; +} + +MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env) { + /* Transite from exclusive state (E-?) to used (S-?) */ + assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); + assert(env->me_lfd != INVALID_HANDLE_VALUE); + +#if 1 + if (env->me_flags & MDBX_EXCLUSIVE) + return MDBX_SUCCESS /* nope since files were must be opened non-shareable */ + ; +#else + /* 1) must be at E-E (exclusive-write) */ + if (env->me_flags & MDBX_EXCLUSIVE) { + /* transite from E-E to E_? (exclusive-read) */ + if (!funlock(env->me_lfd, LCK_UPPER)) + mdbx_panic("%s(%s) failed: err %u", __func__, + "E-E(exclusive-write) >> E-?(exclusive-read)", GetLastError()); + return MDBX_SUCCESS /* 2) now at E-? (exclusive-read), done */; + } +#endif + + /* 3) now at E-E (exclusive-write), transite to ?_E (middle) */ + if (!funlock(env->me_lfd, LCK_LOWER)) + mdbx_panic("%s(%s) failed: err %u", __func__, + "E-E(exclusive-write) >> ?-E(middle)", GetLastError()); + + /* 4) now at ?-E (middle), transite to S-E (locked) */ + if (!flock(env->me_lfd, LCK_SHARED | LCK_DONTWAIT, LCK_LOWER)) { + int rc = GetLastError() /* 5) something went wrong, give up */; + mdbx_error("%s, err %u", "?-E(middle) >> S-E(locked)", rc); + return rc; + } + + /* 6) got S-E (locked), continue transition to S-? (used) */ + if (!funlock(env->me_lfd, LCK_UPPER)) + mdbx_panic("%s(%s) failed: err %u", __func__, "S-E(locked) >> S-?(used)", + GetLastError()); + + return MDBX_SUCCESS /* 7) now at S-? (used), done */; +} + +/*----------------------------------------------------------------------------*/ +/* reader checking (by pid) */ + +MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env) { + (void)env; + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env) { + (void)env; + return MDBX_SUCCESS; +} + +/* Checks reader by pid. + * + * Returns: + * MDBX_RESULT_TRUE, if pid is live (unable to acquire lock) + * MDBX_RESULT_FALSE, if pid is dead (lock acquired) + * or otherwise the errcode. */ +MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid) { + (void)env; + HANDLE hProcess = OpenProcess(SYNCHRONIZE, FALSE, pid); + int rc; + if (likely(hProcess)) { + rc = WaitForSingleObject(hProcess, 0); + if (unlikely(rc == WAIT_FAILED)) + rc = GetLastError(); + CloseHandle(hProcess); + } else { + rc = GetLastError(); + } + + switch (rc) { + case ERROR_INVALID_PARAMETER: + /* pid seems invalid */ + return MDBX_RESULT_FALSE; + case WAIT_OBJECT_0: + /* process just exited */ + return MDBX_RESULT_FALSE; + case ERROR_ACCESS_DENIED: + /* The ERROR_ACCESS_DENIED would be returned for CSRSS-processes, etc. + * assume pid exists */ + return MDBX_RESULT_TRUE; + case WAIT_TIMEOUT: + /* pid running */ + return MDBX_RESULT_TRUE; + default: + /* failure */ + return rc; + } +} + +//---------------------------------------------------------------------------- +// Stub for slim read-write lock +// Copyright (C) 1995-2002 Brad Wilson + +static void WINAPI stub_srwlock_Init(MDBX_srwlock *srwl) { + srwl->readerCount = srwl->writerCount = 0; +} + +static void WINAPI stub_srwlock_AcquireShared(MDBX_srwlock *srwl) { + while (true) { + assert(srwl->writerCount >= 0 && srwl->readerCount >= 0); + + // If there's a writer already, spin without unnecessarily + // interlocking the CPUs + if (srwl->writerCount != 0) { + YieldProcessor(); + continue; + } + + // Add to the readers list + _InterlockedIncrement(&srwl->readerCount); + + // Check for writers again (we may have been pre-empted). If + // there are no writers writing or waiting, then we're done. + if (srwl->writerCount == 0) + break; + + // Remove from the readers list, spin, try again + _InterlockedDecrement(&srwl->readerCount); + YieldProcessor(); + } +} + +static void WINAPI stub_srwlock_ReleaseShared(MDBX_srwlock *srwl) { + assert(srwl->readerCount > 0); + _InterlockedDecrement(&srwl->readerCount); +} + +static void WINAPI stub_srwlock_AcquireExclusive(MDBX_srwlock *srwl) { + while (true) { + assert(srwl->writerCount >= 0 && srwl->readerCount >= 0); + + // If there's a writer already, spin without unnecessarily + // interlocking the CPUs + if (srwl->writerCount != 0) { + YieldProcessor(); + continue; + } + + // See if we can become the writer (expensive, because it inter- + // locks the CPUs, so writing should be an infrequent process) + if (_InterlockedExchange(&srwl->writerCount, 1) == 0) + break; + } + + // Now we're the writer, but there may be outstanding readers. + // Spin until there aren't any more; new readers will wait now + // that we're the writer. + while (srwl->readerCount != 0) { + assert(srwl->writerCount >= 0 && srwl->readerCount >= 0); + YieldProcessor(); + } +} + +static void WINAPI stub_srwlock_ReleaseExclusive(MDBX_srwlock *srwl) { + assert(srwl->writerCount == 1 && srwl->readerCount >= 0); + srwl->writerCount = 0; +} + +MDBX_srwlock_function mdbx_srwlock_Init, mdbx_srwlock_AcquireShared, + mdbx_srwlock_ReleaseShared, mdbx_srwlock_AcquireExclusive, + mdbx_srwlock_ReleaseExclusive; + +/*----------------------------------------------------------------------------*/ + +#if 0 /* LY: unused for now */ +static DWORD WINAPI stub_DiscardVirtualMemory(PVOID VirtualAddress, + SIZE_T Size) { + return VirtualAlloc(VirtualAddress, Size, MEM_RESET, PAGE_NOACCESS) + ? ERROR_SUCCESS + : GetLastError(); +} +#endif /* unused for now */ + +static uint64_t WINAPI stub_GetTickCount64(void) { + LARGE_INTEGER Counter, Frequency; + return (QueryPerformanceFrequency(&Frequency) && + QueryPerformanceCounter(&Counter)) + ? Counter.QuadPart * 1000ul / Frequency.QuadPart + : 0; +} + +/*----------------------------------------------------------------------------*/ +#ifndef MDBX_ALLOY +MDBX_NtExtendSection mdbx_NtExtendSection; +MDBX_GetFileInformationByHandleEx mdbx_GetFileInformationByHandleEx; +MDBX_GetVolumeInformationByHandleW mdbx_GetVolumeInformationByHandleW; +MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW; +MDBX_SetFileInformationByHandle mdbx_SetFileInformationByHandle; +MDBX_NtFsControlFile mdbx_NtFsControlFile; +MDBX_PrefetchVirtualMemory mdbx_PrefetchVirtualMemory; +MDBX_GetTickCount64 mdbx_GetTickCount64; +#if 0 /* LY: unused for now */ +MDBX_DiscardVirtualMemory mdbx_DiscardVirtualMemory; +MDBX_OfferVirtualMemory mdbx_OfferVirtualMemory; +MDBX_ReclaimVirtualMemory mdbx_ReclaimVirtualMemory; +#endif /* unused for now */ +#endif /* MDBX_ALLOY */ + +static void mdbx_winnt_import(void) { + const HINSTANCE hNtdll = GetModuleHandleA("ntdll.dll"); + +#define GET_PROC_ADDR(dll, ENTRY) \ + mdbx_##ENTRY = (MDBX_##ENTRY)GetProcAddress(dll, #ENTRY) + + if (GetProcAddress(hNtdll, "wine_get_version")) { + assert(mdbx_RunningUnderWine()); + } else { + GET_PROC_ADDR(hNtdll, NtFsControlFile); + GET_PROC_ADDR(hNtdll, NtExtendSection); + assert(!mdbx_RunningUnderWine()); + } + + const HINSTANCE hKernel32dll = GetModuleHandleA("kernel32.dll"); + GET_PROC_ADDR(hKernel32dll, GetFileInformationByHandleEx); + GET_PROC_ADDR(hKernel32dll, GetTickCount64); + if (!mdbx_GetTickCount64) + mdbx_GetTickCount64 = stub_GetTickCount64; + if (!mdbx_RunningUnderWine()) { + GET_PROC_ADDR(hKernel32dll, SetFileInformationByHandle); + GET_PROC_ADDR(hKernel32dll, GetVolumeInformationByHandleW); + GET_PROC_ADDR(hKernel32dll, GetFinalPathNameByHandleW); + GET_PROC_ADDR(hKernel32dll, PrefetchVirtualMemory); + } + +#if 0 /* LY: unused for now */ + if (!mdbx_RunningUnderWine()) { + GET_PROC_ADDR(hKernel32dll, DiscardVirtualMemory); + GET_PROC_ADDR(hKernel32dll, OfferVirtualMemory); + GET_PROC_ADDR(hKernel32dll, ReclaimVirtualMemory); + } + if (!mdbx_DiscardVirtualMemory) + mdbx_DiscardVirtualMemory = stub_DiscardVirtualMemory; + if (!mdbx_OfferVirtualMemory) + mdbx_OfferVirtualMemory = stub_OfferVirtualMemory; + if (!mdbx_ReclaimVirtualMemory) + mdbx_ReclaimVirtualMemory = stub_ReclaimVirtualMemory; +#endif /* unused for now */ + +#undef GET_PROC_ADDR + + const MDBX_srwlock_function init = + (MDBX_srwlock_function)GetProcAddress(hKernel32dll, "InitializeSRWLock"); + if (init != NULL) { + mdbx_srwlock_Init = init; + mdbx_srwlock_AcquireShared = (MDBX_srwlock_function)GetProcAddress( + hKernel32dll, "AcquireSRWLockShared"); + mdbx_srwlock_ReleaseShared = (MDBX_srwlock_function)GetProcAddress( + hKernel32dll, "ReleaseSRWLockShared"); + mdbx_srwlock_AcquireExclusive = (MDBX_srwlock_function)GetProcAddress( + hKernel32dll, "AcquireSRWLockExclusive"); + mdbx_srwlock_ReleaseExclusive = (MDBX_srwlock_function)GetProcAddress( + hKernel32dll, "ReleaseSRWLockExclusive"); + } else { + mdbx_srwlock_Init = stub_srwlock_Init; + mdbx_srwlock_AcquireShared = stub_srwlock_AcquireShared; + mdbx_srwlock_ReleaseShared = stub_srwlock_ReleaseShared; + mdbx_srwlock_AcquireExclusive = stub_srwlock_AcquireExclusive; + mdbx_srwlock_ReleaseExclusive = stub_srwlock_ReleaseExclusive; + } +} + +#endif /* Windows LCK-implementation */ diff --git a/libs/libmdbx/src/src/man1/mdbx_chk.1 b/libs/libmdbx/src/src/man1/mdbx_chk.1 index 4cd0a3a838..d2d03684e2 100644 --- a/libs/libmdbx/src/src/man1/mdbx_chk.1 +++ b/libs/libmdbx/src/src/man1/mdbx_chk.1 @@ -1,6 +1,6 @@ .\" Copyright 2015-2020 Leonid Yuriev . .\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.TH MDBX_CHK 1 "2020-01-20" "MDBX 0.6.x" +.TH MDBX_CHK 1 "2020-03-18" "MDBX 0.7.x" .SH NAME mdbx_chk \- MDBX checking tool .SH SYNOPSIS diff --git a/libs/libmdbx/src/src/man1/mdbx_copy.1 b/libs/libmdbx/src/src/man1/mdbx_copy.1 index 863a58add5..a8427bb4df 100644 --- a/libs/libmdbx/src/src/man1/mdbx_copy.1 +++ b/libs/libmdbx/src/src/man1/mdbx_copy.1 @@ -2,7 +2,7 @@ .\" Copyright 2012-2015 Howard Chu, Symas Corp. All Rights Reserved. .\" Copyright 2015,2016 Peter-Service R&D LLC . .\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.TH MDBX_COPY 1 "2020-01-20" "MDBX 0.6.x" +.TH MDBX_COPY 1 "2020-03-18" "MDBX 0.7.x" .SH NAME mdbx_copy \- MDBX environment copy tool .SH SYNOPSIS diff --git a/libs/libmdbx/src/src/man1/mdbx_dump.1 b/libs/libmdbx/src/src/man1/mdbx_dump.1 index 7cf708ab94..9985127f00 100644 --- a/libs/libmdbx/src/src/man1/mdbx_dump.1 +++ b/libs/libmdbx/src/src/man1/mdbx_dump.1 @@ -2,7 +2,7 @@ .\" Copyright 2014-2015 Howard Chu, Symas Corp. All Rights Reserved. .\" Copyright 2015,2016 Peter-Service R&D LLC . .\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.TH MDBX_DUMP 1 "2020-01-20" "MDBX 0.6.x" +.TH MDBX_DUMP 1 "2020-03-18" "MDBX 0.7.x" .SH NAME mdbx_dump \- MDBX environment export tool .SH SYNOPSIS diff --git a/libs/libmdbx/src/src/man1/mdbx_load.1 b/libs/libmdbx/src/src/man1/mdbx_load.1 index 473f9303ef..b401b38715 100644 --- a/libs/libmdbx/src/src/man1/mdbx_load.1 +++ b/libs/libmdbx/src/src/man1/mdbx_load.1 @@ -2,7 +2,7 @@ .\" Copyright 2014-2015 Howard Chu, Symas Corp. All Rights Reserved. .\" Copyright 2015,2016 Peter-Service R&D LLC . .\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.TH MDBX_LOAD 1 "2020-01-20" "MDBX 0.6.x" +.TH MDBX_LOAD 1 "2020-03-18" "MDBX 0.7.x" .SH NAME mdbx_load \- MDBX environment import tool .SH SYNOPSIS diff --git a/libs/libmdbx/src/src/man1/mdbx_stat.1 b/libs/libmdbx/src/src/man1/mdbx_stat.1 index 80969bb3f1..b7fbeb0833 100644 --- a/libs/libmdbx/src/src/man1/mdbx_stat.1 +++ b/libs/libmdbx/src/src/man1/mdbx_stat.1 @@ -2,7 +2,7 @@ .\" Copyright 2012-2015 Howard Chu, Symas Corp. All Rights Reserved. .\" Copyright 2015,2016 Peter-Service R&D LLC . .\" Copying restrictions apply. See COPYRIGHT/LICENSE. -.TH MDBX_STAT 1 "2020-01-20" "MDBX 0.6.x" +.TH MDBX_STAT 1 "2020-03-18" "MDBX 0.7.x" .SH NAME mdbx_stat \- MDBX environment status tool .SH SYNOPSIS diff --git a/libs/libmdbx/src/src/mdbx_chk.c b/libs/libmdbx/src/src/mdbx_chk.c new file mode 100644 index 0000000000..64c1d333bc --- /dev/null +++ b/libs/libmdbx/src/src/mdbx_chk.c @@ -0,0 +1,1472 @@ +/* mdbx_chk.c - memory-mapped database check tool */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . */ + +#ifdef _MSC_VER +#if _MSC_VER > 1800 +#pragma warning(disable : 4464) /* relative include path contains '..' */ +#endif +#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ +#endif /* _MSC_VER (warnings) */ + +#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ +#include "internals.h" + +typedef struct flagbit { + int bit; + const char *name; +} flagbit; + +const flagbit dbflags[] = {{MDBX_DUPSORT, "dupsort"}, + {MDBX_INTEGERKEY, "integerkey"}, + {MDBX_REVERSEKEY, "reversekey"}, + {MDBX_DUPFIXED, "dupfixed"}, + {MDBX_REVERSEDUP, "reversedup"}, + {MDBX_INTEGERDUP, "integerdup"}, + {0, NULL}}; + +#if defined(_WIN32) || defined(_WIN64) +#include "wingetopt.h" + +static volatile BOOL user_break; +static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { + (void)dwCtrlType; + user_break = 1; + return true; +} + +#else /* WINDOWS */ + +static volatile sig_atomic_t user_break; +static void signal_handler(int sig) { + (void)sig; + user_break = 1; +} + +#endif /* !WINDOWS */ + +#define EXIT_INTERRUPTED (EXIT_FAILURE + 4) +#define EXIT_FAILURE_SYS (EXIT_FAILURE + 3) +#define EXIT_FAILURE_MDB (EXIT_FAILURE + 2) +#define EXIT_FAILURE_CHECK_MAJOR (EXIT_FAILURE + 1) +#define EXIT_FAILURE_CHECK_MINOR EXIT_FAILURE + +typedef struct { + const char *name; + struct { + uint64_t branch, large_count, large_volume, leaf; + uint64_t subleaf_dupsort, leaf_dupfixed, subleaf_dupfixed; + uint64_t total, empty, other; + } pages; + uint64_t payload_bytes; + uint64_t lost_bytes; +} walk_dbi_t; + +struct { + short *pagemap; + uint64_t total_payload_bytes; + uint64_t pgcount; + walk_dbi_t dbi[MAX_DBI + CORE_DBS + /* account pseudo-entry for meta */ 1]; +} walk; + +#define dbi_free walk.dbi[FREE_DBI] +#define dbi_main walk.dbi[MAIN_DBI] +#define dbi_meta walk.dbi[CORE_DBS] + +int envflags = MDBX_RDONLY | MDBX_EXCLUSIVE; +MDBX_env *env; +MDBX_txn *txn; +MDBX_envinfo envinfo; +MDBX_stat envstat; +size_t userdb_count, skipped_subdb; +uint64_t total_unused_bytes, reclaimable_pages, gc_pages, alloc_pages, + unused_pages, backed_pages; +unsigned verbose; +bool ignore_wrong_order, quiet, dont_traversal; +const char *only_subdb; + +struct problem { + struct problem *pr_next; + size_t count; + const char *caption; +}; + +struct problem *problems_list; +uint64_t total_problems; + +static void __printf_args(1, 2) print(const char *msg, ...) { + if (!quiet) { + va_list args; + + fflush(stderr); + va_start(args, msg); + vfprintf(stdout, msg, args); + va_end(args); + } +} + +static void __printf_args(1, 2) error(const char *msg, ...) { + total_problems++; + + if (!quiet) { + va_list args; + + fflush(NULL); + va_start(args, msg); + fputs(" ! ", stderr); + vfprintf(stderr, msg, args); + va_end(args); + fflush(NULL); + } +} + +static int check_user_break(void) { + switch (user_break) { + case 0: + return MDBX_SUCCESS; + case 1: + print(" - interrupted by signal\n"); + fflush(NULL); + user_break = 2; + } + return MDBX_EINTR; +} + +static void pagemap_cleanup(void) { + for (size_t i = CORE_DBS + /* account pseudo-entry for meta */ 1; + i < ARRAY_LENGTH(walk.dbi); ++i) { + if (walk.dbi[i].name) { + mdbx_free((void *)walk.dbi[i].name); + walk.dbi[i].name = NULL; + } + } + + mdbx_free(walk.pagemap); + walk.pagemap = NULL; +} + +static walk_dbi_t *pagemap_lookup_dbi(const char *dbi_name, bool silent) { + static walk_dbi_t *last; + + if (dbi_name == MDBX_PGWALK_MAIN) + return &dbi_main; + if (dbi_name == MDBX_PGWALK_GC) + return &dbi_free; + if (dbi_name == MDBX_PGWALK_META) + return &dbi_meta; + + if (last && strcmp(last->name, dbi_name) == 0) + return last; + + walk_dbi_t *dbi = walk.dbi + CORE_DBS + /* account pseudo-entry for meta */ 1; + for (; dbi < ARRAY_END(walk.dbi) && dbi->name; ++dbi) { + if (strcmp(dbi->name, dbi_name) == 0) + return last = dbi; + } + + if (verbose > 0 && !silent) { + print(" - found '%s' area\n", dbi_name); + fflush(NULL); + } + + if (dbi == ARRAY_END(walk.dbi)) + return NULL; + + dbi->name = mdbx_strdup(dbi_name); + return last = dbi; +} + +static void __printf_args(4, 5) + + problem_add(const char *object, uint64_t entry_number, const char *msg, + const char *extra, ...) { + total_problems++; + + if (!quiet) { + int need_fflush = 0; + struct problem *p; + + for (p = problems_list; p; p = p->pr_next) + if (p->caption == msg) + break; + + if (!p) { + p = mdbx_calloc(1, sizeof(*p)); + p->caption = msg; + p->pr_next = problems_list; + problems_list = p; + need_fflush = 1; + } + + p->count++; + if (verbose > 1) { + print(" %s #%" PRIu64 ": %s", object, entry_number, msg); + if (extra) { + va_list args; + printf(" ("); + va_start(args, extra); + vfprintf(stdout, extra, args); + va_end(args); + printf(")"); + } + printf("\n"); + if (need_fflush) + fflush(NULL); + } + } +} + +static struct problem *problems_push(void) { + struct problem *p = problems_list; + problems_list = NULL; + return p; +} + +static size_t problems_pop(struct problem *list) { + size_t count = 0; + + if (problems_list) { + int i; + + print(" - problems: "); + for (i = 0; problems_list; ++i) { + struct problem *p = problems_list->pr_next; + count += problems_list->count; + print("%s%s (%" PRIuPTR ")", i ? ", " : "", problems_list->caption, + problems_list->count); + mdbx_free(problems_list); + problems_list = p; + } + print("\n"); + fflush(NULL); + } + + problems_list = list; + return count; +} + +static int pgvisitor(const uint64_t pgno, const unsigned pgnumber, + void *const ctx, const int deep, + const char *const dbi_name_or_tag, const size_t page_size, + const MDBX_page_type_t pagetype, const size_t nentries, + const size_t payload_bytes, const size_t header_bytes, + const size_t unused_bytes) { + (void)ctx; + if (deep > 42) { + problem_add("deep", deep, "too large", nullptr); + return MDBX_CORRUPTED /* avoid infinite loop/recursion */; + } + + if (pagetype == MDBX_page_void) + return MDBX_SUCCESS; + + walk_dbi_t *dbi = pagemap_lookup_dbi(dbi_name_or_tag, false); + if (!dbi) + return MDBX_ENOMEM; + + const size_t page_bytes = payload_bytes + header_bytes + unused_bytes; + walk.pgcount += pgnumber; + + const char *pagetype_caption; + bool branch = false; + switch (pagetype) { + default: + problem_add("page", pgno, "unknown page-type", "type %u, deep %i", + (unsigned)pagetype, deep); + pagetype_caption = "unknown"; + dbi->pages.other += pgnumber; + break; + case MDBX_page_meta: + pagetype_caption = "meta"; + dbi->pages.other += pgnumber; + break; + case MDBX_page_large: + pagetype_caption = "large"; + dbi->pages.large_volume += pgnumber; + dbi->pages.large_count += 1; + break; + case MDBX_page_branch: + pagetype_caption = "branch"; + dbi->pages.branch += pgnumber; + branch = true; + break; + case MDBX_page_leaf: + pagetype_caption = "leaf"; + dbi->pages.leaf += pgnumber; + break; + case MDBX_page_dupfixed_leaf: + pagetype_caption = "leaf-dupfixed"; + dbi->pages.leaf_dupfixed += pgnumber; + break; + case MDBX_subpage_leaf: + pagetype_caption = "subleaf-dupsort"; + dbi->pages.subleaf_dupsort += 1; + break; + case MDBX_subpage_dupfixed_leaf: + pagetype_caption = "subleaf-dupfixed"; + dbi->pages.subleaf_dupfixed += 1; + break; + } + + if (pgnumber) { + if (verbose > 3 && (!only_subdb || strcmp(only_subdb, dbi->name) == 0)) { + if (pgnumber == 1) + print(" %s-page %" PRIu64, pagetype_caption, pgno); + else + print(" %s-span %" PRIu64 "[%u]", pagetype_caption, pgno, pgnumber); + print(" of %s: header %" PRIiPTR ", payload %" PRIiPTR + ", unused %" PRIiPTR ", deep %i\n", + dbi->name, header_bytes, payload_bytes, unused_bytes, deep); + } + + bool already_used = false; + for (unsigned n = 0; n < pgnumber; ++n) { + uint64_t spanpgno = pgno + n; + if (spanpgno >= alloc_pages) + problem_add("page", spanpgno, "wrong page-no", + "%s-page: %" PRIu64 " > %" PRIu64 ", deep %i", + pagetype_caption, spanpgno, alloc_pages, deep); + else if (walk.pagemap[spanpgno]) { + walk_dbi_t *coll_dbi = &walk.dbi[walk.pagemap[spanpgno] - 1]; + problem_add("page", spanpgno, + (branch && coll_dbi == dbi) ? "loop" : "already used", + "%s-page: by %s, deep %i", pagetype_caption, coll_dbi->name, + deep); + already_used = true; + } else { + walk.pagemap[spanpgno] = (short)(dbi - walk.dbi + 1); + dbi->pages.total += 1; + } + } + + if (already_used) + return branch ? MDBX_RESULT_TRUE /* avoid infinite loop/recursion */ + : MDBX_SUCCESS; + } + + if (unused_bytes > page_size) + problem_add("page", pgno, "illegal unused-bytes", + "%s-page: %u < %" PRIuPTR " < %u", pagetype_caption, 0, + unused_bytes, envstat.ms_psize); + + if (header_bytes < (int)sizeof(long) || + (size_t)header_bytes >= envstat.ms_psize - sizeof(long)) + problem_add("page", pgno, "illegal header-length", + "%s-page: %" PRIuPTR " < %" PRIuPTR " < %" PRIuPTR, + pagetype_caption, sizeof(long), header_bytes, + envstat.ms_psize - sizeof(long)); + if (payload_bytes < 1) { + if (nentries > 1) { + problem_add("page", pgno, "zero size-of-entry", + "%s-page: payload %" PRIuPTR " bytes, %" PRIuPTR " entries", + pagetype_caption, payload_bytes, nentries); + /* if ((size_t)header_bytes + unused_bytes < page_size) { + // LY: hush a misuse error + page_bytes = page_size; + } */ + } else { + problem_add("page", pgno, "empty", + "%s-page: payload %" PRIuPTR " bytes, %" PRIuPTR + " entries, deep %i", + pagetype_caption, payload_bytes, nentries, deep); + dbi->pages.empty += 1; + } + } + + if (pgnumber) { + if (page_bytes != page_size) { + problem_add("page", pgno, "misused", + "%s-page: %" PRIuPTR " != %" PRIuPTR " (%" PRIuPTR + "h + %" PRIuPTR "p + %" PRIuPTR "u), deep %i", + pagetype_caption, page_size, page_bytes, header_bytes, + payload_bytes, unused_bytes, deep); + if (page_size > page_bytes) + dbi->lost_bytes += page_size - page_bytes; + } else { + dbi->payload_bytes += payload_bytes + header_bytes; + walk.total_payload_bytes += payload_bytes + header_bytes; + } + } + + return check_user_break(); +} + +typedef int(visitor)(const uint64_t record_number, const MDBX_val *key, + const MDBX_val *data); +static int process_db(MDBX_dbi dbi_handle, char *dbi_name, visitor *handler, + bool silent); + +static int handle_userdb(const uint64_t record_number, const MDBX_val *key, + const MDBX_val *data) { + (void)record_number; + (void)key; + (void)data; + return check_user_break(); +} + +static int handle_freedb(const uint64_t record_number, const MDBX_val *key, + const MDBX_val *data) { + char *bad = ""; + pgno_t *iptr = data->iov_base; + + if (key->iov_len != sizeof(txnid_t)) + problem_add("entry", record_number, "wrong txn-id size", + "key-size %" PRIiPTR, key->iov_len); + else { + txnid_t txnid; + memcpy(&txnid, key->iov_base, sizeof(txnid)); + if (txnid < 1 || txnid > envinfo.mi_recent_txnid) + problem_add("entry", record_number, "wrong txn-id", "%" PRIaTXN, txnid); + else { + if (data->iov_len < sizeof(pgno_t) || data->iov_len % sizeof(pgno_t)) + problem_add("entry", txnid, "wrong idl size", "%" PRIuPTR, + data->iov_len); + size_t number = (data->iov_len >= sizeof(pgno_t)) ? *iptr++ : 0; + if (number < 1 || number > MDBX_PNL_MAX) + problem_add("entry", txnid, "wrong idl length", "%" PRIuPTR, number); + else if ((number + 1) * sizeof(pgno_t) > data->iov_len) { + problem_add("entry", txnid, "trimmed idl", + "%" PRIuSIZE " > %" PRIuSIZE " (corruption)", + (number + 1) * sizeof(pgno_t), data->iov_len); + number = data->iov_len / sizeof(pgno_t) - 1; + } else if (data->iov_len - (number + 1) * sizeof(pgno_t) >= + /* LY: allow gap upto one page. it is ok + * and better than shink-and-retry inside mdbx_update_gc() */ + envstat.ms_psize) + problem_add("entry", txnid, "extra idl space", + "%" PRIuSIZE " < %" PRIuSIZE " (minor, not a trouble)", + (number + 1) * sizeof(pgno_t), data->iov_len); + + gc_pages += number; + if (envinfo.mi_latter_reader_txnid > txnid) + reclaimable_pages += number; + + pgno_t prev = MDBX_PNL_ASCENDING ? NUM_METAS - 1 : txn->mt_next_pgno; + pgno_t span = 1; + for (unsigned i = 0; i < number; ++i) { + if (check_user_break()) + return MDBX_EINTR; + const pgno_t pgno = iptr[i]; + if (pgno < NUM_METAS) + problem_add("entry", txnid, "wrong idl entry", + "pgno %" PRIaPGNO " < meta-pages %u", pgno, NUM_METAS); + else if (pgno >= backed_pages) + problem_add("entry", txnid, "wrong idl entry", + "pgno %" PRIaPGNO " > backed-pages %" PRIu64, pgno, + backed_pages); + else if (pgno >= alloc_pages) + problem_add("entry", txnid, "wrong idl entry", + "pgno %" PRIaPGNO " > alloc-pages %" PRIu64, pgno, + alloc_pages - 1); + else { + if (MDBX_PNL_DISORDERED(prev, pgno)) { + bad = " [bad sequence]"; + problem_add("entry", txnid, "bad sequence", + "%" PRIaPGNO " %c [%u].%" PRIaPGNO, prev, + (prev == pgno) ? '=' : (MDBX_PNL_ASCENDING ? '>' : '<'), + i, pgno); + } + if (walk.pagemap) { + int idx = walk.pagemap[pgno]; + if (idx == 0) + walk.pagemap[pgno] = -1; + else if (idx > 0) + problem_add("page", pgno, "already used", "by %s", + walk.dbi[idx - 1].name); + else + problem_add("page", pgno, "already listed in GC", nullptr); + } + } + prev = pgno; + while (i + span < number && + iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pgno, span) + : pgno_sub(pgno, span))) + ++span; + } + if (verbose > 3 && !only_subdb) { + print(" transaction %" PRIaTXN ", %" PRIuPTR + " pages, maxspan %" PRIaPGNO "%s\n", + txnid, number, span, bad); + if (verbose > 4) { + for (unsigned i = 0; i < number; i += span) { + const pgno_t pgno = iptr[i]; + for (span = 1; + i + span < number && + iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pgno, span) + : pgno_sub(pgno, span)); + ++span) + ; + if (span > 1) { + print(" %9" PRIaPGNO "[%" PRIaPGNO "]\n", pgno, span); + } else + print(" %9" PRIaPGNO "\n", pgno); + } + } + } + } + } + + return check_user_break(); +} + +static int handle_maindb(const uint64_t record_number, const MDBX_val *key, + const MDBX_val *data) { + char *name; + int rc; + size_t i; + + name = key->iov_base; + for (i = 0; i < key->iov_len; ++i) { + if (name[i] < ' ') + return handle_userdb(record_number, key, data); + } + + name = mdbx_malloc(key->iov_len + 1); + memcpy(name, key->iov_base, key->iov_len); + name[key->iov_len] = '\0'; + userdb_count++; + + rc = process_db(~0u, name, handle_userdb, false); + mdbx_free(name); + if (rc != MDBX_INCOMPATIBLE) + return rc; + + return handle_userdb(record_number, key, data); +} + +static int process_db(MDBX_dbi dbi_handle, char *dbi_name, visitor *handler, + bool silent) { + MDBX_cursor *mc; + MDBX_stat ms; + MDBX_val key, data; + MDBX_val prev_key, prev_data; + unsigned flags; + int rc, i; + struct problem *saved_list; + uint64_t problems_count; + + uint64_t record_count = 0, dups = 0; + uint64_t key_bytes = 0, data_bytes = 0; + + if ((MDBX_TXN_FINISHED | MDBX_TXN_ERROR) & mdbx_txn_flags(txn)) { + print(" ! abort processing '%s' due to a previous error\n", + dbi_name ? dbi_name : "@MAIN"); + return MDBX_BAD_TXN; + } + + if (dbi_handle == ~0u) { + rc = mdbx_dbi_open(txn, dbi_name, 0, &dbi_handle); + if (rc) { + if (!dbi_name || + rc != + MDBX_INCOMPATIBLE) /* LY: mainDB's record is not a user's DB. */ { + error("mdbx_open '%s' failed, error %d %s\n", + dbi_name ? dbi_name : "main", rc, mdbx_strerror(rc)); + } + return rc; + } + } + + if (dbi_handle >= CORE_DBS && dbi_name && only_subdb && + strcmp(only_subdb, dbi_name) != 0) { + if (verbose) { + print("Skip processing '%s'...\n", dbi_name); + fflush(NULL); + } + skipped_subdb++; + return MDBX_SUCCESS; + } + + if (!silent && verbose) { + print("Processing '%s'...\n", dbi_name ? dbi_name : "@MAIN"); + fflush(NULL); + } + + rc = mdbx_dbi_flags(txn, dbi_handle, &flags); + if (rc) { + error("mdbx_dbi_flags failed, error %d %s\n", rc, mdbx_strerror(rc)); + return rc; + } + + rc = mdbx_dbi_stat(txn, dbi_handle, &ms, sizeof(ms)); + if (rc) { + error("mdbx_dbi_stat failed, error %d %s\n", rc, mdbx_strerror(rc)); + return rc; + } + + if (!silent && verbose) { + print(" - dbi-id %d, flags:", dbi_handle); + if (!flags) + print(" none"); + else { + for (i = 0; dbflags[i].bit; i++) + if (flags & dbflags[i].bit) + print(" %s", dbflags[i].name); + } + print(" (0x%02X)\n", flags); + if (verbose > 1) { + print(" - page size %u, entries %" PRIu64 "\n", ms.ms_psize, + ms.ms_entries); + print(" - b-tree depth %u, pages: branch %" PRIu64 ", leaf %" PRIu64 + ", overflow %" PRIu64 "\n", + ms.ms_depth, ms.ms_branch_pages, ms.ms_leaf_pages, + ms.ms_overflow_pages); + } + } + + walk_dbi_t *dbi = (dbi_handle < CORE_DBS) + ? &walk.dbi[dbi_handle] + : pagemap_lookup_dbi(dbi_name, true); + if (!dbi) { + error("too many DBIs or out of memory\n"); + return MDBX_ENOMEM; + } + if (!dont_traversal) { + const uint64_t subtotal_pages = + ms.ms_branch_pages + ms.ms_leaf_pages + ms.ms_overflow_pages; + if (subtotal_pages != dbi->pages.total) + error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", + "subtotal", subtotal_pages, dbi->pages.total); + if (ms.ms_branch_pages != dbi->pages.branch) + error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", "branch", + ms.ms_branch_pages, dbi->pages.branch); + const uint64_t allleaf_pages = dbi->pages.leaf + dbi->pages.leaf_dupfixed; + if (ms.ms_leaf_pages != allleaf_pages) + error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", + "all-leaf", ms.ms_leaf_pages, allleaf_pages); + if (ms.ms_overflow_pages != dbi->pages.large_volume) + error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", + "large/overlow", ms.ms_overflow_pages, dbi->pages.large_volume); + } + rc = mdbx_cursor_open(txn, dbi_handle, &mc); + if (rc) { + error("mdbx_cursor_open failed, error %d %s\n", rc, mdbx_strerror(rc)); + return rc; + } + + const size_t maxkeysize = mdbx_env_get_maxkeysize_ex(env, flags); + + saved_list = problems_push(); + prev_key.iov_base = NULL; + prev_key.iov_len = 0; + prev_data.iov_base = NULL; + prev_data.iov_len = 0; + rc = mdbx_cursor_get(mc, &key, &data, MDBX_FIRST); + while (rc == MDBX_SUCCESS) { + rc = check_user_break(); + if (rc) + goto bailout; + + bool bad_key = false; + if (key.iov_len > maxkeysize) { + problem_add("entry", record_count, "key length exceeds max-key-size", + "%" PRIuPTR " > %" PRIuPTR, key.iov_len, maxkeysize); + bad_key = true; + } else if ((flags & MDBX_INTEGERKEY) && key.iov_len != sizeof(uint64_t) && + key.iov_len != sizeof(uint32_t)) { + problem_add("entry", record_count, "wrong key length", + "%" PRIuPTR " != 4or8", key.iov_len); + bad_key = true; + } + + bool bad_data = false; + if ((flags & MDBX_INTEGERDUP) && data.iov_len != sizeof(uint64_t) && + data.iov_len != sizeof(uint32_t)) { + problem_add("entry", record_count, "wrong data length", + "%" PRIuPTR " != 4or8", data.iov_len); + bad_data = true; + } + + if (prev_key.iov_base && !bad_data) { + if ((flags & MDBX_DUPFIXED) && prev_data.iov_len != data.iov_len) { + problem_add("entry", record_count, "different data length", + "%" PRIuPTR " != %" PRIuPTR, prev_data.iov_len, + data.iov_len); + bad_data = true; + } + + if (!bad_key) { + int cmp = mdbx_cmp(txn, dbi_handle, &prev_key, &key); + if (cmp == 0) { + ++dups; + if ((flags & MDBX_DUPSORT) == 0) { + problem_add("entry", record_count, "duplicated entries", NULL); + if (data.iov_len == prev_data.iov_len && + memcmp(data.iov_base, prev_data.iov_base, data.iov_len) == 0) { + problem_add("entry", record_count, "complete duplicate", NULL); + } + } else if (!bad_data) { + cmp = mdbx_dcmp(txn, dbi_handle, &prev_data, &data); + if (cmp == 0) { + problem_add("entry", record_count, "complete duplicate", NULL); + } else if (cmp > 0 && !ignore_wrong_order) { + problem_add("entry", record_count, "wrong order of multi-values", + NULL); + } + } + } else if (cmp > 0 && !ignore_wrong_order) { + problem_add("entry", record_count, "wrong order of entries", NULL); + } + } + } else if (verbose) { + if (flags & MDBX_INTEGERKEY) + print(" - fixed key-size %" PRIuPTR "\n", key.iov_len); + if (flags & (MDBX_INTEGERDUP | MDBX_DUPFIXED)) + print(" - fixed data-size %" PRIuPTR "\n", data.iov_len); + } + + if (handler) { + rc = handler(record_count, &key, &data); + if (MDBX_IS_ERROR(rc)) + goto bailout; + } + + record_count++; + key_bytes += key.iov_len; + data_bytes += data.iov_len; + + if (!bad_key) + prev_key = key; + if (!bad_data) + prev_data = data; + rc = mdbx_cursor_get(mc, &key, &data, MDBX_NEXT); + } + if (rc != MDBX_NOTFOUND) + error("mdbx_cursor_get failed, error %d %s\n", rc, mdbx_strerror(rc)); + else + rc = 0; + + if (record_count != ms.ms_entries) + problem_add("entry", record_count, "differentent number of entries", + "%" PRIu64 " != %" PRIu64, record_count, ms.ms_entries); +bailout: + problems_count = problems_pop(saved_list); + if (!silent && verbose) { + print(" - summary: %" PRIu64 " records, %" PRIu64 " dups, %" PRIu64 + " key's bytes, %" PRIu64 " data's " + "bytes, %" PRIu64 " problems\n", + record_count, dups, key_bytes, data_bytes, problems_count); + fflush(NULL); + } + + mdbx_cursor_close(mc); + return (rc || problems_count) ? MDBX_RESULT_TRUE : MDBX_SUCCESS; +} + +static void usage(char *prog) { + fprintf( + stderr, + "usage: %s [-V] [-v] [-n] [-q] [-c] [-w] [-d] [-i] [-s subdb] dbpath\n" + " -V\t\tprint version and exit\n" + " -v\t\tmore verbose, could be used multiple times\n" + " -n\t\tNOSUBDIR mode for open\n" + " -q\t\tbe quiet\n" + " -c\t\tforce cooperative mode (don't try exclusive)\n" + " -w\t\tlock DB for writing while checking\n" + " -d\t\tdisable page-by-page traversal of B-tree\n" + " -i\t\tignore wrong order errors (for custom comparators case)\n" + " -s subdb\tprocess a specific subdatabase only\n", + prog); + exit(EXIT_INTERRUPTED); +} + +const char *meta_synctype(uint64_t sign) { + switch (sign) { + case MDBX_DATASIGN_NONE: + return "no-sync/legacy"; + case MDBX_DATASIGN_WEAK: + return "weak"; + default: + return "steady"; + } +} + +static __inline bool meta_ot(txnid_t txn_a, uint64_t sign_a, txnid_t txn_b, + uint64_t sign_b, const bool roolback2steady) { + if (txn_a == txn_b) + return SIGN_IS_STEADY(sign_b); + + if (roolback2steady && SIGN_IS_STEADY(sign_a) != SIGN_IS_STEADY(sign_b)) + return SIGN_IS_STEADY(sign_b); + + return txn_a < txn_b; +} + +static __inline bool meta_eq(txnid_t txn_a, uint64_t sign_a, txnid_t txn_b, + uint64_t sign_b) { + if (txn_a != txn_b) + return false; + + if (SIGN_IS_STEADY(sign_a) != SIGN_IS_STEADY(sign_b)) + return false; + + return true; +} + +static __inline int meta_recent(const bool roolback2steady) { + + if (meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, + envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, roolback2steady)) + return meta_ot(envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, + envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, + roolback2steady) + ? 1 + : 2; + + return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, + envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, roolback2steady) + ? 2 + : 0; +} + +static __inline int meta_tail(int head) { + + if (head == 0) + return meta_ot(envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, + envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, true) + ? 1 + : 2; + if (head == 1) + return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, + envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, true) + ? 0 + : 2; + if (head == 2) + return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, + envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, true) + ? 0 + : 1; + assert(false); + return -1; +} + +static int meta_steady(void) { return meta_recent(true); } + +static int meta_head(void) { return meta_recent(false); } + +void verbose_meta(int num, txnid_t txnid, uint64_t sign, uint64_t bootid_h, + uint64_t bootid_l) { + print(" - meta-%d: %s %" PRIu64, num, meta_synctype(sign), txnid); + bool stay = true; + const bool bootid_match = bootid_h == envinfo.mi_bootid.current.h && + bootid_l == envinfo.mi_bootid.current.l && + (bootid_h | bootid_l) != 0; + + const int steady = meta_steady(); + const int head = meta_head(); + if (num == steady && num == head) { + print(", head"); + stay = false; + } else if (num == steady) { + print(", head-steady"); + stay = false; + } else if (num == head) { + print(", head-weak%s", bootid_match ? "-intact (same boot-id)" : ""); + stay = false; + } + if (num == meta_tail(head)) { + print(", tail"); + stay = false; + } + if (stay) + print(", stay"); + + if (txnid > envinfo.mi_recent_txnid && + (envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) == MDBX_EXCLUSIVE) + print(", rolled-back %" PRIu64 " (%" PRIu64 " >>> %" PRIu64 ")", + txnid - envinfo.mi_recent_txnid, txnid, envinfo.mi_recent_txnid); + print("\n"); +} + +static uint64_t get_meta_txnid(const unsigned meta_id) { + switch (meta_id) { + default: + assert(false); + error("unexpected meta_id %u\n", meta_id); + return 0; + case 0: + return envinfo.mi_meta0_txnid; + case 1: + return envinfo.mi_meta1_txnid; + case 2: + return envinfo.mi_meta2_txnid; + } +} + +static void print_size(const char *prefix, const uint64_t value, + const char *suffix) { + const char sf[] = + "KMGTPEZY"; /* LY: Kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta! */ + double k = 1024.0; + size_t i; + for (i = 0; sf[i + 1] && value / k > 1000.0; ++i) + k *= 1024; + print("%s%" PRIu64 " (%.2f %cb)%s", prefix, value, value / k, sf[i], suffix); +} + +int main(int argc, char *argv[]) { + int rc; + char *prog = argv[0]; + char *envname; + int problems_maindb = 0, problems_freedb = 0, problems_meta = 0; + bool locked = false; + + double elapsed; +#if defined(_WIN32) || defined(_WIN64) + uint64_t timestamp_start, timestamp_finish; + timestamp_start = GetTickCount64(); +#else + struct timespec timestamp_start, timestamp_finish; + if (clock_gettime(CLOCK_MONOTONIC, ×tamp_start)) { + rc = errno; + error("clock_gettime failed, error %d %s\n", rc, mdbx_strerror(rc)); + return EXIT_FAILURE_SYS; + } +#endif + + dbi_meta.name = "@META"; + dbi_free.name = "@GC"; + dbi_main.name = "@MAIN"; + atexit(pagemap_cleanup); + + if (argc < 2) + usage(prog); + + for (int i; (i = getopt(argc, argv, "Vvqnwcdsi:")) != EOF;) { + switch (i) { + case 'V': + printf("mdbx_chk version %d.%d.%d.%d\n" + " - source: %s %s, commit %s, tree %s\n" + " - anchor: %s\n" + " - build: %s for %s by %s\n" + " - flags: %s\n" + " - options: %s\n", + mdbx_version.major, mdbx_version.minor, mdbx_version.release, + mdbx_version.revision, mdbx_version.git.describe, + mdbx_version.git.datetime, mdbx_version.git.commit, + mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, + mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, + mdbx_build.options); + return EXIT_SUCCESS; + case 'v': + verbose++; + break; + case 'q': + quiet = true; + break; + case 'n': + envflags |= MDBX_NOSUBDIR; + break; + case 'w': + envflags &= ~MDBX_RDONLY; + break; + case 'c': + envflags = (envflags & ~MDBX_EXCLUSIVE) | MDBX_ACCEDE; + break; + case 'd': + dont_traversal = true; + break; + case 's': + if (only_subdb && strcmp(only_subdb, optarg)) + usage(prog); + only_subdb = optarg; + break; + case 'i': + ignore_wrong_order = true; + break; + default: + usage(prog); + } + } + + if (optind != argc - 1) + usage(prog); + +#if defined(_WIN32) || defined(_WIN64) + SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); +#else +#ifdef SIGPIPE + signal(SIGPIPE, signal_handler); +#endif +#ifdef SIGHUP + signal(SIGHUP, signal_handler); +#endif + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); +#endif /* !WINDOWS */ + + envname = argv[optind]; + print("mdbx_chk %s (%s, T-%s)\nRunning for %s in 'read-%s' mode...\n", + mdbx_version.git.describe, mdbx_version.git.datetime, + mdbx_version.git.tree, envname, + (envflags & MDBX_RDONLY) ? "only" : "write"); + fflush(NULL); + + rc = mdbx_env_create(&env); + if (rc) { + error("mdbx_env_create failed, error %d %s\n", rc, mdbx_strerror(rc)); + return rc < 0 ? EXIT_FAILURE_MDB : EXIT_FAILURE_SYS; + } + + rc = mdbx_env_set_maxdbs(env, MAX_DBI); + if (rc) { + error("mdbx_env_set_maxdbs failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + rc = mdbx_env_open(env, envname, envflags, 0); + if ((envflags & MDBX_EXCLUSIVE) && + (rc == MDBX_BUSY || +#if defined(_WIN32) || defined(_WIN64) + rc == ERROR_LOCK_VIOLATION || rc == ERROR_SHARING_VIOLATION +#else + rc == EBUSY || rc == EAGAIN +#endif + )) { + envflags &= ~MDBX_EXCLUSIVE; + rc = mdbx_env_open(env, envname, envflags | MDBX_ACCEDE, 0); + } + + if (rc) { + error("mdbx_env_open failed, error %d %s\n", rc, mdbx_strerror(rc)); + if (rc == MDBX_WANNA_RECOVERY && (envflags & MDBX_RDONLY)) + print("Please run %s in the read-write mode (with '-w' option).\n", prog); + goto bailout; + } + if (verbose) + print(" - %s mode\n", + (envflags & MDBX_EXCLUSIVE) ? "monopolistic" : "cooperative"); + + if ((envflags & MDBX_RDONLY) == 0) { + rc = mdbx_txn_lock(env, false); + if (rc != MDBX_SUCCESS) { + error("mdbx_txn_lock failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + locked = true; + } + + rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn); + if (rc) { + error("mdbx_txn_begin() failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + rc = mdbx_env_info_ex(env, txn, &envinfo, sizeof(envinfo)); + if (rc) { + error("mdbx_env_info failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + rc = mdbx_env_stat_ex(env, txn, &envstat, sizeof(envstat)); + if (rc) { + error("mdbx_env_stat failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + mdbx_filehandle_t dxb_fd; + rc = mdbx_env_get_fd(env, &dxb_fd); + if (rc) { + error("mdbx_env_get_fd failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + uint64_t dxb_filesize = 0; +#if defined(_WIN32) || defined(_WIN64) + { + BY_HANDLE_FILE_INFORMATION info; + if (!GetFileInformationByHandle(dxb_fd, &info)) + rc = GetLastError(); + else + dxb_filesize = info.nFileSizeLow | (uint64_t)info.nFileSizeHigh << 32; + } +#else + { + struct stat st; + STATIC_ASSERT_MSG(sizeof(off_t) <= sizeof(uint64_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + if (fstat(dxb_fd, &st)) + rc = errno; + else + dxb_filesize = st.st_size; + } +#endif + if (rc) { + error("mdbx_filesize failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + errno = 0; + const uint64_t dxbfile_pages = dxb_filesize / envinfo.mi_dxb_pagesize; + alloc_pages = txn->mt_next_pgno; + backed_pages = envinfo.mi_geo.current / envinfo.mi_dxb_pagesize; + if (backed_pages > dxbfile_pages) { + print(" ! backed-pages %" PRIu64 " > file-pages %" PRIu64 "\n", + backed_pages, dxbfile_pages); + ++problems_meta; + } + if (dxbfile_pages < NUM_METAS) + print(" ! file-pages %" PRIu64 " < %u\n", dxbfile_pages, NUM_METAS); + if (backed_pages < NUM_METAS) + print(" ! backed-pages %" PRIu64 " < %u\n", backed_pages, NUM_METAS); + if (backed_pages < NUM_METAS || dxbfile_pages < NUM_METAS) + goto bailout; + if (backed_pages > MAX_PAGENO) { + print(" ! backed-pages %" PRIu64 " > max-pages %" PRIaPGNO "\n", + backed_pages, MAX_PAGENO); + ++problems_meta; + backed_pages = MAX_PAGENO; + } + + if ((envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_RDONLY) { + if (backed_pages > dxbfile_pages) { + print(" ! backed-pages %" PRIu64 " > file-pages %" PRIu64 "\n", + backed_pages, dxbfile_pages); + ++problems_meta; + backed_pages = dxbfile_pages; + } + if (alloc_pages > backed_pages) { + print(" ! alloc-pages %" PRIu64 " > backed-pages %" PRIu64 "\n", + alloc_pages, backed_pages); + ++problems_meta; + alloc_pages = backed_pages; + } + } else { + /* LY: DB may be shrinked by writer downto the allocated pages. */ + if (alloc_pages > backed_pages) { + print(" ! alloc-pages %" PRIu64 " > backed-pages %" PRIu64 "\n", + alloc_pages, backed_pages); + ++problems_meta; + alloc_pages = backed_pages; + } + if (alloc_pages > dxbfile_pages) { + print(" ! alloc-pages %" PRIu64 " > file-pages %" PRIu64 "\n", + alloc_pages, dxbfile_pages); + ++problems_meta; + alloc_pages = dxbfile_pages; + } + if (backed_pages > dxbfile_pages) + backed_pages = dxbfile_pages; + } + + if (verbose) { + print(" - pagesize %u (%u system), max keysize %d..%d" + ", max readers %u\n", + envinfo.mi_dxb_pagesize, envinfo.mi_sys_pagesize, + mdbx_env_get_maxkeysize_ex(env, MDBX_DUPSORT), + mdbx_env_get_maxkeysize_ex(env, 0), envinfo.mi_maxreaders); + print_size(" - mapsize ", envinfo.mi_mapsize, "\n"); + if (envinfo.mi_geo.lower == envinfo.mi_geo.upper) + print_size(" - fixed datafile: ", envinfo.mi_geo.current, ""); + else { + print_size(" - dynamic datafile: ", envinfo.mi_geo.lower, ""); + print_size(" .. ", envinfo.mi_geo.upper, ", "); + print_size("+", envinfo.mi_geo.grow, ", "); + print_size("-", envinfo.mi_geo.shrink, "\n"); + print_size(" - current datafile: ", envinfo.mi_geo.current, ""); + } + printf(", %" PRIu64 " pages\n", + envinfo.mi_geo.current / envinfo.mi_dxb_pagesize); +#if defined(_WIN32) || defined(_WIN64) + if (envinfo.mi_geo.shrink && envinfo.mi_geo.current != envinfo.mi_geo.upper) + print(" WARNING: Due Windows system limitations a " + "file couldn't\n be truncated while database " + "is opened. So, the size of\n database file " + "may by large than the database itself,\n " + "until it will be closed or reopened in read-write mode.\n"); +#endif + print(" - transactions: recent %" PRIu64 ", latter reader %" PRIu64 + ", lag %" PRIi64 "\n", + envinfo.mi_recent_txnid, envinfo.mi_latter_reader_txnid, + envinfo.mi_recent_txnid - envinfo.mi_latter_reader_txnid); + + verbose_meta(0, envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, + envinfo.mi_bootid.meta0.h, envinfo.mi_bootid.meta0.l); + verbose_meta(1, envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, + envinfo.mi_bootid.meta1.h, envinfo.mi_bootid.meta1.l); + verbose_meta(2, envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, + envinfo.mi_bootid.meta2.h, envinfo.mi_bootid.meta2.l); + } + + if (verbose > 1) + print(" - performs check for meta-pages clashes\n"); + if (meta_eq(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, + envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign)) { + print(" ! meta-%d and meta-%d are clashed\n", 0, 1); + ++problems_meta; + } + if (meta_eq(envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, + envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign)) { + print(" ! meta-%d and meta-%d are clashed\n", 1, 2); + ++problems_meta; + } + if (meta_eq(envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, + envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign)) { + print(" ! meta-%d and meta-%d are clashed\n", 2, 0); + ++problems_meta; + } + + const unsigned steady_meta_id = meta_recent(true); + const uint64_t steady_meta_txnid = get_meta_txnid(steady_meta_id); + const unsigned weak_meta_id = meta_recent(false); + const uint64_t weak_meta_txnid = get_meta_txnid(weak_meta_id); + if (envflags & MDBX_EXCLUSIVE) { + if (verbose > 1) + print(" - performs full check recent-txn-id with meta-pages\n"); + if (steady_meta_txnid != envinfo.mi_recent_txnid) { + print(" ! steady meta-%d txn-id mismatch recent-txn-id (%" PRIi64 + " != %" PRIi64 ")\n", + steady_meta_id, steady_meta_txnid, envinfo.mi_recent_txnid); + ++problems_meta; + } + } else if (locked) { + if (verbose > 1) + print(" - performs lite check recent-txn-id with meta-pages (not a " + "monopolistic mode)\n"); + if (weak_meta_txnid != envinfo.mi_recent_txnid) { + print(" ! weak meta-%d txn-id mismatch recent-txn-id (%" PRIi64 + " != %" PRIi64 ")\n", + weak_meta_id, weak_meta_txnid, envinfo.mi_recent_txnid); + ++problems_meta; + } + } else if (verbose) { + print(" - skip check recent-txn-id with meta-pages (monopolistic or " + "read-write mode only)\n"); + } + total_problems += problems_meta; + + if (!dont_traversal) { + struct problem *saved_list; + size_t traversal_problems; + uint64_t empty_pages, lost_bytes; + + print("Traversal b-tree by txn#%" PRIaTXN "...\n", txn->mt_txnid); + fflush(NULL); + walk.pagemap = mdbx_calloc((size_t)backed_pages, sizeof(*walk.pagemap)); + if (!walk.pagemap) { + rc = errno ? errno : MDBX_ENOMEM; + error("calloc failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + saved_list = problems_push(); + rc = mdbx_env_pgwalk(txn, pgvisitor, NULL); + traversal_problems = problems_pop(saved_list); + + if (rc) { + if (rc != MDBX_EINTR || !check_user_break()) + error("mdbx_env_pgwalk failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto bailout; + } + + for (uint64_t n = 0; n < alloc_pages; ++n) + if (!walk.pagemap[n]) + unused_pages += 1; + + empty_pages = lost_bytes = 0; + for (walk_dbi_t *dbi = &dbi_main; dbi < ARRAY_END(walk.dbi) && dbi->name; + ++dbi) { + empty_pages += dbi->pages.empty; + lost_bytes += dbi->lost_bytes; + } + + if (verbose) { + uint64_t total_page_bytes = walk.pgcount * envstat.ms_psize; + print(" - pages: total %" PRIu64 ", unused %" PRIu64 "\n", walk.pgcount, + unused_pages); + if (verbose > 1) { + for (walk_dbi_t *dbi = walk.dbi; dbi < ARRAY_END(walk.dbi) && dbi->name; + ++dbi) { + print(" %s: subtotal %" PRIu64, dbi->name, dbi->pages.total); + if (dbi->pages.other && dbi->pages.other != dbi->pages.total) + print(", other %" PRIu64, dbi->pages.other); + if (dbi->pages.branch) + print(", branch %" PRIu64, dbi->pages.branch); + if (dbi->pages.large_count) + print(", large %" PRIu64, dbi->pages.large_count); + uint64_t all_leaf = dbi->pages.leaf + dbi->pages.leaf_dupfixed; + if (all_leaf) { + print(", leaf %" PRIu64, all_leaf); + if (verbose > 2 && + (dbi->pages.leaf_dupfixed | dbi->pages.subleaf_dupsort | + dbi->pages.subleaf_dupsort)) + print(" (usual %" PRIu64 ", sub-dupsort %" PRIu64 + ", dupfixed %" PRIu64 ", sub-dupfixed %" PRIu64 ")", + dbi->pages.leaf, dbi->pages.subleaf_dupsort, + dbi->pages.leaf_dupfixed, dbi->pages.subleaf_dupfixed); + } + print("\n"); + } + } + + if (verbose > 1) + print(" - usage: total %" PRIu64 " bytes, payload %" PRIu64 + " (%.1f%%), unused " + "%" PRIu64 " (%.1f%%)\n", + total_page_bytes, walk.total_payload_bytes, + walk.total_payload_bytes * 100.0 / total_page_bytes, + total_page_bytes - walk.total_payload_bytes, + (total_page_bytes - walk.total_payload_bytes) * 100.0 / + total_page_bytes); + if (verbose > 2) { + for (walk_dbi_t *dbi = walk.dbi; dbi < ARRAY_END(walk.dbi) && dbi->name; + ++dbi) + if (dbi->pages.total) { + uint64_t dbi_bytes = dbi->pages.total * envstat.ms_psize; + print(" %s: subtotal %" PRIu64 " bytes (%.1f%%)," + " payload %" PRIu64 " (%.1f%%), unused %" PRIu64 " (%.1f%%)", + dbi->name, dbi_bytes, dbi_bytes * 100.0 / total_page_bytes, + dbi->payload_bytes, dbi->payload_bytes * 100.0 / dbi_bytes, + dbi_bytes - dbi->payload_bytes, + (dbi_bytes - dbi->payload_bytes) * 100.0 / dbi_bytes); + if (dbi->pages.empty) + print(", %" PRIu64 " empty pages", dbi->pages.empty); + if (dbi->lost_bytes) + print(", %" PRIu64 " bytes lost", dbi->lost_bytes); + print("\n"); + } else + print(" %s: empty\n", dbi->name); + } + print(" - summary: average fill %.1f%%", + walk.total_payload_bytes * 100.0 / total_page_bytes); + if (empty_pages) + print(", %" PRIu64 " empty pages", empty_pages); + if (lost_bytes) + print(", %" PRIu64 " bytes lost", lost_bytes); + print(", %" PRIuPTR " problems\n", traversal_problems); + } + } else if (verbose) { + print("Skipping b-tree walk...\n"); + fflush(NULL); + } + + if (!verbose) + print("Iterating DBIs...\n"); + problems_maindb = process_db(~0u, /* MAIN_DBI */ NULL, NULL, false); + problems_freedb = process_db(FREE_DBI, "@GC", handle_freedb, false); + + if (verbose) { + uint64_t value = envinfo.mi_mapsize / envstat.ms_psize; + double percent = value / 100.0; + print(" - space: %" PRIu64 " total pages", value); + print(", backed %" PRIu64 " (%.1f%%)", backed_pages, + backed_pages / percent); + print(", allocated %" PRIu64 " (%.1f%%)", alloc_pages, + alloc_pages / percent); + + if (verbose > 1) { + value = envinfo.mi_mapsize / envstat.ms_psize - alloc_pages; + print(", remained %" PRIu64 " (%.1f%%)", value, value / percent); + + value = alloc_pages - gc_pages; + print(", used %" PRIu64 " (%.1f%%)", value, value / percent); + + print(", gc %" PRIu64 " (%.1f%%)", gc_pages, gc_pages / percent); + + value = gc_pages - reclaimable_pages; + print(", detained %" PRIu64 " (%.1f%%)", value, value / percent); + + print(", reclaimable %" PRIu64 " (%.1f%%)", reclaimable_pages, + reclaimable_pages / percent); + } + + value = + envinfo.mi_mapsize / envstat.ms_psize - alloc_pages + reclaimable_pages; + print(", available %" PRIu64 " (%.1f%%)\n", value, value / percent); + } + + if (problems_maindb == 0 && problems_freedb == 0) { + if (!dont_traversal && + (envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_RDONLY) { + if (walk.pgcount != alloc_pages - gc_pages) { + error("used pages mismatch (%" PRIu64 "(walked) != %" PRIu64 + "(allocated - GC))\n", + walk.pgcount, alloc_pages - gc_pages); + } + if (unused_pages != gc_pages) { + error("gc pages mismatch (%" PRIu64 "(walked) != %" PRIu64 "(GC))\n", + unused_pages, gc_pages); + } + } else if (verbose) { + print(" - skip check used and gc pages (btree-traversal with " + "monopolistic or read-write mode only)\n"); + } + + if (!process_db(MAIN_DBI, NULL, handle_maindb, true)) { + if (!userdb_count && verbose) + print(" - does not contain multiple databases\n"); + } + } + + if (rc == 0 && total_problems == 1 && problems_meta == 1 && !dont_traversal && + (envflags & MDBX_RDONLY) == 0 && !only_subdb && + steady_meta_txnid < envinfo.mi_recent_txnid) { + print("Perform sync-to-disk for make steady checkpoint at txn-id #%" PRIi64 + "\n", + envinfo.mi_recent_txnid); + fflush(NULL); + if (locked) { + mdbx_txn_unlock(env); + locked = false; + } + rc = mdbx_env_sync_ex(env, true, false); + if (rc != MDBX_SUCCESS) + error("mdbx_env_pgwalk failed, error %d %s\n", rc, mdbx_strerror(rc)); + else { + total_problems -= 1; + problems_meta -= 1; + } + } + +bailout: + if (txn) + mdbx_txn_abort(txn); + if (locked) { + mdbx_txn_unlock(env); + locked = false; + } + if (env) { + const bool dont_sync = rc != 0 || total_problems; + mdbx_env_close_ex(env, dont_sync); + } + fflush(NULL); + if (rc) { + if (rc < 0) + return user_break ? EXIT_INTERRUPTED : EXIT_FAILURE_SYS; + return EXIT_FAILURE_MDB; + } + +#if defined(_WIN32) || defined(_WIN64) + timestamp_finish = GetTickCount64(); + elapsed = (timestamp_finish - timestamp_start) * 1e-3; +#else + if (clock_gettime(CLOCK_MONOTONIC, ×tamp_finish)) { + rc = errno; + error("clock_gettime failed, error %d %s\n", rc, mdbx_strerror(rc)); + return EXIT_FAILURE_SYS; + } + elapsed = timestamp_finish.tv_sec - timestamp_start.tv_sec + + (timestamp_finish.tv_nsec - timestamp_start.tv_nsec) * 1e-9; +#endif /* !WINDOWS */ + + if (total_problems) { + print("Total %" PRIu64 " error%s detected, elapsed %.3f seconds.\n", + total_problems, (total_problems > 1) ? "s are" : " is", elapsed); + if (problems_meta || problems_maindb || problems_freedb) + return EXIT_FAILURE_CHECK_MAJOR; + return EXIT_FAILURE_CHECK_MINOR; + } + print("No error is detected, elapsed %.3f seconds\n", elapsed); + return EXIT_SUCCESS; +} diff --git a/libs/libmdbx/src/src/mdbx_copy.c b/libs/libmdbx/src/src/mdbx_copy.c new file mode 100644 index 0000000000..81d177ab99 --- /dev/null +++ b/libs/libmdbx/src/src/mdbx_copy.c @@ -0,0 +1,143 @@ +/* mdbx_copy.c - memory-mapped database backup tool */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . */ + +#ifdef _MSC_VER +#if _MSC_VER > 1800 +#pragma warning(disable : 4464) /* relative include path contains '..' */ +#endif +#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ +#endif /* _MSC_VER (warnings) */ + +#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ +#include "internals.h" + +#if defined(_WIN32) || defined(_WIN64) +#include "wingetopt.h" + +static volatile BOOL user_break; +static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { + (void)dwCtrlType; + user_break = true; + return true; +} + +#else /* WINDOWS */ + +static volatile sig_atomic_t user_break; +static void signal_handler(int sig) { + (void)sig; + user_break = 1; +} + +#endif /* !WINDOWS */ + +static void usage(const char *prog) { + fprintf(stderr, + "usage: %s [-V] [-q] [-c] [-n] src_path [dest_path]\n" + " -V\t\tprint version and exit\n" + " -q\t\tbe quiet\n" + " -c\t\tenable compactification (skip unused pages)\n" + " -n\t\tNOSUBDIR mode for open\n" + " src_path\tsource database\n" + " dest_path\tdestination (stdout if not specified)\n", + prog); + exit(EXIT_FAILURE); +} + +int main(int argc, char *argv[]) { + int rc; + MDBX_env *env = NULL; + const char *progname = argv[0], *act; + unsigned flags = MDBX_RDONLY; + unsigned cpflags = 0; + bool quiet = false; + + for (; argc > 1 && argv[1][0] == '-'; argc--, argv++) { + if (argv[1][1] == 'n' && argv[1][2] == '\0') + flags |= MDBX_NOSUBDIR; + else if (argv[1][1] == 'c' && argv[1][2] == '\0') + cpflags |= MDBX_CP_COMPACT; + else if (argv[1][1] == 'q' && argv[1][2] == '\0') + quiet = true; + else if ((argv[1][1] == 'h' && argv[1][2] == '\0') || + strcmp(argv[1], "--help") == 0) + usage(progname); + else if (argv[1][1] == 'V' && argv[1][2] == '\0') { + printf("mdbx_copy version %d.%d.%d.%d\n" + " - source: %s %s, commit %s, tree %s\n" + " - anchor: %s\n" + " - build: %s for %s by %s\n" + " - flags: %s\n" + " - options: %s\n", + mdbx_version.major, mdbx_version.minor, mdbx_version.release, + mdbx_version.revision, mdbx_version.git.describe, + mdbx_version.git.datetime, mdbx_version.git.commit, + mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, + mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, + mdbx_build.options); + return EXIT_SUCCESS; + } else + argc = 0; + } + + if (argc < 2 || argc > 3) + usage(progname); + +#if defined(_WIN32) || defined(_WIN64) + SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); +#else +#ifdef SIGPIPE + signal(SIGPIPE, signal_handler); +#endif +#ifdef SIGHUP + signal(SIGHUP, signal_handler); +#endif + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); +#endif /* !WINDOWS */ + + if (!quiet) { + fprintf((argc == 2) ? stderr : stdout, + "mdbx_copy %s (%s, T-%s)\nRunning for copy %s to %s...\n", + mdbx_version.git.describe, mdbx_version.git.datetime, + mdbx_version.git.tree, argv[1], (argc == 2) ? "stdout" : argv[2]); + fflush(NULL); + } + + act = "opening environment"; + rc = mdbx_env_create(&env); + if (rc == MDBX_SUCCESS) { + rc = mdbx_env_open(env, argv[1], flags, 0640); + } + if (rc == MDBX_SUCCESS) { + act = "copying"; + if (argc == 2) { + mdbx_filehandle_t fd; +#if defined(_WIN32) || defined(_WIN64) + fd = GetStdHandle(STD_OUTPUT_HANDLE); +#else + fd = fileno(stdout); +#endif + rc = mdbx_env_copy2fd(env, fd, cpflags); + } else + rc = mdbx_env_copy(env, argv[2], cpflags); + } + if (rc) + fprintf(stderr, "%s: %s failed, error %d (%s)\n", progname, act, rc, + mdbx_strerror(rc)); + mdbx_env_close(env); + + return rc ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/libs/libmdbx/src/src/mdbx_dump.c b/libs/libmdbx/src/src/mdbx_dump.c new file mode 100644 index 0000000000..8bb057b2df --- /dev/null +++ b/libs/libmdbx/src/src/mdbx_dump.c @@ -0,0 +1,389 @@ +/* mdbx_dump.c - memory-mapped database dump tool */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . */ + +#ifdef _MSC_VER +#if _MSC_VER > 1800 +#pragma warning(disable : 4464) /* relative include path contains '..' */ +#endif +#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ +#endif /* _MSC_VER (warnings) */ + +#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ +#include "internals.h" + +#include + +#define PRINT 1 +static int mode; + +typedef struct flagbit { + int bit; + char *name; +} flagbit; + +flagbit dbflags[] = {{MDBX_REVERSEKEY, "reversekey"}, + {MDBX_DUPSORT, "dupsort"}, + {MDBX_INTEGERKEY, "integerkey"}, + {MDBX_DUPFIXED, "dupfixed"}, + {MDBX_INTEGERDUP, "integerdup"}, + {MDBX_REVERSEDUP, "reversedup"}, + {0, NULL}}; + +#if defined(_WIN32) || defined(_WIN64) +#include "wingetopt.h" + +static volatile BOOL user_break; +static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { + (void)dwCtrlType; + user_break = true; + return true; +} + +#else /* WINDOWS */ + +static volatile sig_atomic_t user_break; +static void signal_handler(int sig) { + (void)sig; + user_break = 1; +} + +#endif /* !WINDOWS */ + +static const char hexc[] = "0123456789abcdef"; + +static void dumpbyte(unsigned char c) { + putchar(hexc[c >> 4]); + putchar(hexc[c & 0xf]); +} + +static void text(MDBX_val *v) { + unsigned char *c, *end; + + putchar(' '); + c = v->iov_base; + end = c + v->iov_len; + while (c < end) { + if (isprint(*c) && *c != '\\') { + putchar(*c); + } else { + putchar('\\'); + dumpbyte(*c); + } + c++; + } + putchar('\n'); +} + +static void dumpval(MDBX_val *v) { + unsigned char *c, *end; + + putchar(' '); + c = v->iov_base; + end = c + v->iov_len; + while (c < end) { + dumpbyte(*c++); + } + putchar('\n'); +} + +/* Dump in BDB-compatible format */ +static int dumpit(MDBX_txn *txn, MDBX_dbi dbi, char *name) { + MDBX_cursor *mc; + MDBX_stat ms; + MDBX_val key, data; + MDBX_envinfo info; + unsigned int flags; + int rc, i; + + rc = mdbx_dbi_flags(txn, dbi, &flags); + if (rc) + return rc; + + rc = mdbx_dbi_stat(txn, dbi, &ms, sizeof(ms)); + if (rc) + return rc; + + rc = mdbx_env_info_ex(mdbx_txn_env(txn), txn, &info, sizeof(info)); + if (rc) + return rc; + + printf("VERSION=3\n"); + printf("format=%s\n", mode & PRINT ? "print" : "bytevalue"); + if (name) + printf("database=%s\n", name); + printf("type=btree\n"); + printf("mapsize=%" PRIu64 "\n", info.mi_geo.upper); + printf("maxreaders=%u\n", info.mi_maxreaders); + + for (i = 0; dbflags[i].bit; i++) + if (flags & dbflags[i].bit) + printf("%s=1\n", dbflags[i].name); + + printf("db_pagesize=%d\n", ms.ms_psize); + printf("HEADER=END\n"); + + rc = mdbx_cursor_open(txn, dbi, &mc); + if (rc) + return rc; + + while ((rc = mdbx_cursor_get(mc, &key, &data, MDBX_NEXT)) == MDBX_SUCCESS) { + if (user_break) { + rc = MDBX_EINTR; + break; + } + if (mode & PRINT) { + text(&key); + text(&data); + } else { + dumpval(&key); + dumpval(&data); + } + } + printf("DATA=END\n"); + if (rc == MDBX_NOTFOUND) + rc = MDBX_SUCCESS; + + return rc; +} + +static void usage(char *prog) { + fprintf(stderr, + "usage: %s [-V] [-q] [-f file] [-l] [-p] [-a|-s subdb] [-r] [-n] " + "dbpath\n" + " -V\t\tprint version and exit\n" + " -q\t\tbe quiet\n" + " -f\t\twrite to file instead of stdout\n" + " -l\t\tlist subDBs and exit\n" + " -p\t\tuse printable characters\n" + " -a\t\tdump main DB and all subDBs,\n" + " \t\tby default dump only the main DB\n" + " -s\t\tdump only the named subDB\n" + " -r\t\trescure mode (ignore errors to dump corrupted DB)\n" + " -n\t\tNOSUBDIR mode for open\n", + prog); + exit(EXIT_FAILURE); +} + +int main(int argc, char *argv[]) { + int i, rc; + MDBX_env *env; + MDBX_txn *txn; + MDBX_dbi dbi; + char *prog = argv[0]; + char *envname; + char *subname = NULL; + int alldbs = 0, envflags = 0, list = 0, quiet = 0, rescue = 0; + + if (argc < 2) + usage(prog); + + while ((i = getopt(argc, argv, "af:lnps:Vrq")) != EOF) { + switch (i) { + case 'V': + printf("mdbx_dump version %d.%d.%d.%d\n" + " - source: %s %s, commit %s, tree %s\n" + " - anchor: %s\n" + " - build: %s for %s by %s\n" + " - flags: %s\n" + " - options: %s\n", + mdbx_version.major, mdbx_version.minor, mdbx_version.release, + mdbx_version.revision, mdbx_version.git.describe, + mdbx_version.git.datetime, mdbx_version.git.commit, + mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, + mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, + mdbx_build.options); + return EXIT_SUCCESS; + case 'l': + list = 1; + /*FALLTHROUGH*/; + __fallthrough; + case 'a': + if (subname) + usage(prog); + alldbs++; + break; + case 'f': + if (freopen(optarg, "w", stdout) == NULL) { + fprintf(stderr, "%s: %s: reopen: %s\n", prog, optarg, + mdbx_strerror(errno)); + exit(EXIT_FAILURE); + } + break; + case 'n': + envflags |= MDBX_NOSUBDIR; + break; + case 'p': + mode |= PRINT; + break; + case 's': + if (alldbs) + usage(prog); + subname = optarg; + break; + case 'q': + quiet = 1; + break; + case 'r': + rescue = 1; + break; + default: + usage(prog); + } + } + + if (optind != argc - 1) + usage(prog); + +#if defined(_WIN32) || defined(_WIN64) + SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); +#else +#ifdef SIGPIPE + signal(SIGPIPE, signal_handler); +#endif +#ifdef SIGHUP + signal(SIGHUP, signal_handler); +#endif + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); +#endif /* !WINDOWS */ + + envname = argv[optind]; + if (!quiet) { + fprintf(stderr, "mdbx_dump %s (%s, T-%s)\nRunning for %s...\n", + mdbx_version.git.describe, mdbx_version.git.datetime, + mdbx_version.git.tree, envname); + fflush(NULL); + } + + rc = mdbx_env_create(&env); + if (rc) { + fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc, + mdbx_strerror(rc)); + return EXIT_FAILURE; + } + + if (alldbs || subname) { + mdbx_env_set_maxdbs(env, 2); + } + + rc = mdbx_env_open( + env, envname, + envflags | (rescue ? MDBX_RDONLY | MDBX_EXCLUSIVE : MDBX_RDONLY), 0); + if (rc) { + fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + + rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn); + if (rc) { + fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + + rc = mdbx_dbi_open(txn, subname, 0, &dbi); + if (rc) { + fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto txn_abort; + } + + if (alldbs) { + MDBX_cursor *cursor; + MDBX_val key; + int count = 0; + + rc = mdbx_cursor_open(txn, dbi, &cursor); + if (rc) { + fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + while ((rc = mdbx_cursor_get(cursor, &key, NULL, MDBX_NEXT_NODUP)) == 0) { + if (user_break) { + rc = MDBX_EINTR; + break; + } + char *str; + MDBX_dbi db2; + if (memchr(key.iov_base, '\0', key.iov_len)) + continue; + count++; + str = mdbx_malloc(key.iov_len + 1); + memcpy(str, key.iov_base, key.iov_len); + str[key.iov_len] = '\0'; + rc = mdbx_dbi_open(txn, str, 0, &db2); + if (rc == MDBX_SUCCESS) { + if (list) { + printf("%s\n", str); + list++; + } else { + rc = dumpit(txn, db2, str); + if (rc) { + if (!rescue) + break; + fprintf(stderr, "%s: %s: ignore %s for `%s` and continue\n", prog, + envname, mdbx_strerror(rc), str); + /* Here is a hack for rescue mode, don't do that: + * - we should restart transaction in case error due + * database corruption; + * - but we won't close cursor, reopen and re-positioning it + * for new a transaction; + * - this is possible since DB is opened in read-only exclusive + * mode and transaction is the same, i.e. has the same address + * and so on. */ + rc = mdbx_txn_reset(txn); + if (rc) { + fprintf(stderr, "mdbx_txn_reset failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + rc = mdbx_txn_renew(txn); + if (rc) { + fprintf(stderr, "mdbx_txn_renew failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + } + } + mdbx_dbi_close(env, db2); + } + mdbx_free(str); + if (rc) + continue; + } + mdbx_cursor_close(cursor); + if (!count) { + fprintf(stderr, "%s: %s does not contain multiple databases\n", prog, + envname); + rc = MDBX_NOTFOUND; + } else if (rc == MDBX_INCOMPATIBLE) { + /* LY: the record it not a named sub-db. */ + rc = MDBX_SUCCESS; + } + } else { + rc = dumpit(txn, dbi, subname); + } + if (rc && rc != MDBX_NOTFOUND) + fprintf(stderr, "%s: %s: %s\n", prog, envname, mdbx_strerror(rc)); + + mdbx_dbi_close(env, dbi); +txn_abort: + mdbx_txn_abort(txn); +env_close: + mdbx_env_close(env); + + return rc ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/libs/libmdbx/src/src/mdbx_load.c b/libs/libmdbx/src/src/mdbx_load.c new file mode 100644 index 0000000000..eb39cc1174 --- /dev/null +++ b/libs/libmdbx/src/src/mdbx_load.c @@ -0,0 +1,618 @@ +/* mdbx_load.c - memory-mapped database load tool */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . */ + +#ifdef _MSC_VER +#if _MSC_VER > 1800 +#pragma warning(disable : 4464) /* relative include path contains '..' */ +#endif +#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ +#endif /* _MSC_VER (warnings) */ + +#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ +#include "internals.h" + +#include + +#if defined(_WIN32) || defined(_WIN64) +#include "wingetopt.h" + +static volatile BOOL user_break; +static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { + (void)dwCtrlType; + user_break = true; + return true; +} + +#else /* WINDOWS */ + +static volatile sig_atomic_t user_break; +static void signal_handler(int sig) { + (void)sig; + user_break = 1; +} + +#endif /* !WINDOWS */ + +#define PRINT 1 +#define NOHDR 2 +static int mode; + +static char *subname = NULL; +static size_t lineno; +static int version; + +static int dbi_flags; +static char *prog; +static bool Eof; + +static MDBX_envinfo envinfo; +static MDBX_val kbuf, dbuf; +static MDBX_val k0buf; + +#define STRLENOF(s) (sizeof(s) - 1) + +typedef struct flagbit { + int bit; + char *name; + int len; +} flagbit; + +#define S(s) s, STRLENOF(s) + +flagbit dbflags[] = {{MDBX_REVERSEKEY, S("reversekey")}, + {MDBX_DUPSORT, S("dupsort")}, + {MDBX_INTEGERKEY, S("integerkey")}, + {MDBX_DUPFIXED, S("dupfixed")}, + {MDBX_INTEGERDUP, S("integerdup")}, + {MDBX_REVERSEDUP, S("reversedup")}, + {0, NULL, 0}}; + +static void readhdr(void) { + char *ptr; + + dbi_flags = 0; + while (fgets(dbuf.iov_base, (int)dbuf.iov_len, stdin) != NULL) { + lineno++; + + if (!strncmp(dbuf.iov_base, "db_pagesize=", STRLENOF("db_pagesize="))) { + envinfo.mi_dxb_pagesize = + atoi((char *)dbuf.iov_base + STRLENOF("db_pagesize=")); + continue; + } + + if (!strncmp(dbuf.iov_base, "duplicates=", STRLENOF("duplicates="))) { + dbi_flags |= MDBX_DUPSORT; + continue; + } + + if (!strncmp(dbuf.iov_base, "VERSION=", STRLENOF("VERSION="))) { + version = atoi((char *)dbuf.iov_base + STRLENOF("VERSION=")); + if (version > 3) { + fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported VERSION %d\n", + prog, lineno, version); + exit(EXIT_FAILURE); + } + continue; + } + + if (!strncmp(dbuf.iov_base, "HEADER=END", STRLENOF("HEADER=END"))) + return; + + if (!strncmp(dbuf.iov_base, "format=", STRLENOF("format="))) { + if (!strncmp((char *)dbuf.iov_base + STRLENOF("FORMAT="), "print", + STRLENOF("print"))) + mode |= PRINT; + else if (strncmp((char *)dbuf.iov_base + STRLENOF("FORMAT="), "bytevalue", + STRLENOF("bytevalue"))) { + fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported FORMAT %s\n", prog, + lineno, (char *)dbuf.iov_base + STRLENOF("FORMAT=")); + exit(EXIT_FAILURE); + } + continue; + } + + if (!strncmp(dbuf.iov_base, "database=", STRLENOF("database="))) { + ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); + if (ptr) + *ptr = '\0'; + if (subname) + mdbx_free(subname); + subname = mdbx_strdup((char *)dbuf.iov_base + STRLENOF("database=")); + continue; + } + + if (!strncmp(dbuf.iov_base, "type=", STRLENOF("type="))) { + if (strncmp((char *)dbuf.iov_base + STRLENOF("type="), "btree", + STRLENOF("btree"))) { + fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported type %s\n", prog, + lineno, (char *)dbuf.iov_base + STRLENOF("type=")); + exit(EXIT_FAILURE); + } + continue; + } + + if (!strncmp(dbuf.iov_base, "mapaddr=", STRLENOF("mapaddr="))) { + int i; + ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); + if (ptr) + *ptr = '\0'; + void *unused; + i = sscanf((char *)dbuf.iov_base + STRLENOF("mapaddr="), "%p", &unused); + if (i != 1) { + fprintf(stderr, "%s: line %" PRIiSIZE ": invalid mapaddr %s\n", prog, + lineno, (char *)dbuf.iov_base + STRLENOF("mapaddr=")); + exit(EXIT_FAILURE); + } + continue; + } + + if (!strncmp(dbuf.iov_base, "mapsize=", STRLENOF("mapsize="))) { + int i; + ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); + if (ptr) + *ptr = '\0'; + i = sscanf((char *)dbuf.iov_base + STRLENOF("mapsize="), "%" PRIu64, + &envinfo.mi_mapsize); + if (i != 1) { + fprintf(stderr, "%s: line %" PRIiSIZE ": invalid mapsize %s\n", prog, + lineno, (char *)dbuf.iov_base + STRLENOF("mapsize=")); + exit(EXIT_FAILURE); + } + continue; + } + + if (!strncmp(dbuf.iov_base, "maxreaders=", STRLENOF("maxreaders="))) { + int i; + ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); + if (ptr) + *ptr = '\0'; + i = sscanf((char *)dbuf.iov_base + STRLENOF("maxreaders="), "%u", + &envinfo.mi_maxreaders); + if (i != 1) { + fprintf(stderr, "%s: line %" PRIiSIZE ": invalid maxreaders %s\n", prog, + lineno, (char *)dbuf.iov_base + STRLENOF("maxreaders=")); + exit(EXIT_FAILURE); + } + continue; + } + + int i; + for (i = 0; dbflags[i].bit; i++) { + if (!strncmp(dbuf.iov_base, dbflags[i].name, dbflags[i].len) && + ((char *)dbuf.iov_base)[dbflags[i].len] == '=') { + if (((char *)dbuf.iov_base)[dbflags[i].len + 1] == '1') + dbi_flags |= dbflags[i].bit; + break; + } + } + if (!dbflags[i].bit) { + ptr = memchr(dbuf.iov_base, '=', dbuf.iov_len); + if (!ptr) { + fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected format\n", prog, + lineno); + exit(EXIT_FAILURE); + } else { + *ptr = '\0'; + fprintf(stderr, + "%s: line %" PRIiSIZE ": unrecognized keyword ignored: %s\n", + prog, lineno, (char *)dbuf.iov_base); + } + } + } + Eof = true; +} + +static void badend(void) { + fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected end of input\n", prog, + lineno); +} + +static int unhex(unsigned char *c2) { + int x, c; + x = *c2++ & 0x4f; + if (x & 0x40) + x -= 55; + c = x << 4; + x = *c2 & 0x4f; + if (x & 0x40) + x -= 55; + c |= x; + return c; +} + +static int readline(MDBX_val *out, MDBX_val *buf) { + unsigned char *c1, *c2, *end; + size_t len, l2; + int c; + + if (!(mode & NOHDR)) { + c = fgetc(stdin); + if (c == EOF) { + Eof = true; + return EOF; + } + if (c != ' ') { + lineno++; + if (fgets(buf->iov_base, (int)buf->iov_len, stdin) == NULL) { + badend: + Eof = true; + badend(); + return EOF; + } + if (c == 'D' && !strncmp(buf->iov_base, "ATA=END", STRLENOF("ATA=END"))) + return EOF; + goto badend; + } + } + if (fgets(buf->iov_base, (int)buf->iov_len, stdin) == NULL) { + Eof = true; + return EOF; + } + lineno++; + + c1 = buf->iov_base; + len = strlen((char *)c1); + l2 = len; + + /* Is buffer too short? */ + while (c1[len - 1] != '\n') { + buf->iov_base = mdbx_realloc(buf->iov_base, buf->iov_len * 2); + if (!buf->iov_base) { + Eof = true; + fprintf(stderr, "%s: line %" PRIiSIZE ": out of memory, line too long\n", + prog, lineno); + return EOF; + } + c1 = buf->iov_base; + c1 += l2; + if (fgets((char *)c1, (int)buf->iov_len + 1, stdin) == NULL) { + Eof = true; + badend(); + return EOF; + } + buf->iov_len *= 2; + len = strlen((char *)c1); + l2 += len; + } + c1 = c2 = buf->iov_base; + len = l2; + c1[--len] = '\0'; + end = c1 + len; + + if (mode & PRINT) { + while (c2 < end) { + if (unlikely(*c2 == '\\')) { + if (c2[1] == '\\') { + *c1++ = '\\'; + } else { + if (c2 + 3 > end || !isxdigit(c2[1]) || !isxdigit(c2[2])) { + Eof = true; + badend(); + return EOF; + } + *c1++ = (char)unhex(++c2); + } + c2 += 2; + } else { + /* copies are redundant when no escapes were used */ + *c1++ = *c2++; + } + } + } else { + /* odd length not allowed */ + if (len & 1) { + Eof = true; + badend(); + return EOF; + } + while (c2 < end) { + if (!isxdigit(*c2) || !isxdigit(c2[1])) { + Eof = true; + badend(); + return EOF; + } + *c1++ = (char)unhex(c2); + c2 += 2; + } + } + c2 = out->iov_base = buf->iov_base; + out->iov_len = c1 - c2; + + return 0; +} + +static void usage(void) { + fprintf(stderr, + "usage: %s [-V] [-q] [-a] [-f file] [-s name] [-N] [-T] [-r] [-n] " + "dbpath\n" + " -V\t\tprint version and exit\n" + " -q\t\tbe quiet\n" + " -a\t\tappend records in input order (required for custom " + "comparators)\n" + " -f file\tread from file instead of stdin\n" + " -s name\tload into named subDB\n" + " -N\t\tuse NOOVERWRITE on puts\n" + " -T\t\tread plaintext\n" + " -r\t\trescure mode (ignore errors to load corrupted DB dump)\n" + " -n\t\tNOSUBDIR mode for open\n", + prog); + exit(EXIT_FAILURE); +} + +static int anyway_greater(const MDBX_val *a, const MDBX_val *b) { + (void)a; + (void)b; + return 1; +} + +int main(int argc, char *argv[]) { + int i, rc; + MDBX_env *env = NULL; + MDBX_txn *txn = NULL; + MDBX_cursor *mc = NULL; + MDBX_dbi dbi; + char *envname = NULL; + int envflags = MDBX_UTTERLY_NOSYNC, putflags = 0; + int append = 0; + int quiet = 0; + int rescue = 0; + MDBX_val prevk; + + prog = argv[0]; + if (argc < 2) + usage(); + + while ((i = getopt(argc, argv, "af:ns:NTVrq")) != EOF) { + switch (i) { + case 'V': + printf("mdbx_load version %d.%d.%d.%d\n" + " - source: %s %s, commit %s, tree %s\n" + " - anchor: %s\n" + " - build: %s for %s by %s\n" + " - flags: %s\n" + " - options: %s\n", + mdbx_version.major, mdbx_version.minor, mdbx_version.release, + mdbx_version.revision, mdbx_version.git.describe, + mdbx_version.git.datetime, mdbx_version.git.commit, + mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, + mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, + mdbx_build.options); + return EXIT_SUCCESS; + case 'a': + append = 1; + break; + case 'f': + if (freopen(optarg, "r", stdin) == NULL) { + fprintf(stderr, "%s: %s: open: %s\n", prog, optarg, + mdbx_strerror(errno)); + exit(EXIT_FAILURE); + } + break; + case 'n': + envflags |= MDBX_NOSUBDIR; + break; + case 's': + subname = mdbx_strdup(optarg); + break; + case 'N': + putflags = MDBX_NOOVERWRITE | MDBX_NODUPDATA; + break; + case 'T': + mode |= NOHDR | PRINT; + break; + case 'q': + quiet = 1; + break; + case 'r': + rescue = 1; + break; + default: + usage(); + } + } + + if (optind != argc - 1) + usage(); + +#if defined(_WIN32) || defined(_WIN64) + SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); +#else +#ifdef SIGPIPE + signal(SIGPIPE, signal_handler); +#endif +#ifdef SIGHUP + signal(SIGHUP, signal_handler); +#endif + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); +#endif /* !WINDOWS */ + + envname = argv[optind]; + if (!quiet) + printf("mdbx_load %s (%s, T-%s)\nRunning for %s...\n", + mdbx_version.git.describe, mdbx_version.git.datetime, + mdbx_version.git.tree, envname); + fflush(NULL); + + dbuf.iov_len = 4096; + dbuf.iov_base = mdbx_malloc(dbuf.iov_len); + + /* read first header for mapsize= */ + if (!(mode & NOHDR)) + readhdr(); + + rc = mdbx_env_create(&env); + if (rc) { + fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc, + mdbx_strerror(rc)); + return EXIT_FAILURE; + } + + mdbx_env_set_maxdbs(env, 2); + +#ifdef MDBX_FIXEDMAP + if (info.mi_mapaddr) + envflags |= MDBX_FIXEDMAP; +#endif + + if (envinfo.mi_mapsize) { + if (envinfo.mi_mapsize > INTPTR_MAX) { + fprintf(stderr, + "Database size is too large for current system (mapsize=%" PRIu64 + " is great than system-limit %zi)\n", + envinfo.mi_mapsize, INTPTR_MAX); + goto env_close; + } + rc = mdbx_env_set_geometry(env, 0, 0, (intptr_t)envinfo.mi_mapsize, -1, -1, + -1); + if (rc) { + fprintf(stderr, "mdbx_env_set_geometry failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + } + + rc = mdbx_env_open(env, envname, envflags, 0664); + if (rc) { + fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + + kbuf.iov_len = mdbx_env_get_maxvalsize_ex(env, MDBX_DUPSORT); + if (kbuf.iov_len >= INTPTR_MAX / 4) { + fprintf(stderr, "mdbx_env_get_maxkeysize failed, returns %zu\n", + kbuf.iov_len); + goto env_close; + } + kbuf.iov_len = (kbuf.iov_len + 1) * 2; + kbuf.iov_base = malloc(kbuf.iov_len * 2); + k0buf.iov_len = kbuf.iov_len; + k0buf.iov_base = (char *)kbuf.iov_base + kbuf.iov_len; + prevk.iov_base = k0buf.iov_base; + + while (!Eof) { + if (user_break) { + rc = MDBX_EINTR; + break; + } + + rc = mdbx_txn_begin(env, NULL, 0, &txn); + if (rc) { + fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + + rc = mdbx_dbi_open_ex(txn, subname, dbi_flags | MDBX_CREATE, &dbi, + append ? anyway_greater : NULL, + append ? anyway_greater : NULL); + if (rc) { + fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto txn_abort; + } + + rc = mdbx_cursor_open(txn, dbi, &mc); + if (rc) { + fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + + int batch = 0; + prevk.iov_len = 0; + while (1) { + MDBX_val key; + rc = readline(&key, &kbuf); + if (rc) /* rc == EOF */ + break; + + MDBX_val data; + rc = readline(&data, &dbuf); + if (rc) { + fprintf(stderr, "%s: line %" PRIiSIZE ": failed to read key value\n", + prog, lineno); + goto txn_abort; + } + + int appflag = 0; + if (append) { + appflag = MDBX_APPEND; + if (dbi_flags & MDBX_DUPSORT) { + if (prevk.iov_len == key.iov_len && + memcmp(prevk.iov_base, key.iov_base, key.iov_len) == 0) + appflag = MDBX_APPEND | MDBX_APPENDDUP; + else + memcpy(prevk.iov_base, key.iov_base, prevk.iov_len = key.iov_len); + } + } + rc = mdbx_cursor_put(mc, &key, &data, putflags | appflag); + if (rc == MDBX_KEYEXIST && putflags) + continue; + if (rc == MDBX_BAD_VALSIZE && rescue) { + fprintf(stderr, "%s: skip line %" PRIiSIZE ": due %s\n", prog, lineno, + mdbx_strerror(rc)); + continue; + } + if (rc) { + fprintf(stderr, "mdbx_cursor_put failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + batch++; + if (batch == 100) { + rc = mdbx_txn_commit(txn); + if (rc) { + fprintf(stderr, "%s: line %" PRIiSIZE ": txn_commit: %s\n", prog, + lineno, mdbx_strerror(rc)); + goto env_close; + } + rc = mdbx_txn_begin(env, NULL, 0, &txn); + if (rc) { + fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + rc = mdbx_cursor_open(txn, dbi, &mc); + if (rc) { + fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + batch = 0; + } + } + rc = mdbx_txn_commit(txn); + txn = NULL; + if (rc) { + fprintf(stderr, "%s: line %" PRIiSIZE ": txn_commit: %s\n", prog, lineno, + mdbx_strerror(rc)); + goto env_close; + } + mdbx_dbi_close(env, dbi); + subname = NULL; + + /* try read next header */ + if (!(mode & NOHDR)) + readhdr(); + } + +txn_abort: + mdbx_txn_abort(txn); +env_close: + mdbx_env_close(env); + + return rc ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/libs/libmdbx/src/src/mdbx_stat.c b/libs/libmdbx/src/src/mdbx_stat.c new file mode 100644 index 0000000000..d1a805f925 --- /dev/null +++ b/libs/libmdbx/src/src/mdbx_stat.c @@ -0,0 +1,445 @@ +/* mdbx_stat.c - memory-mapped database status tool */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . */ + +#ifdef _MSC_VER +#if _MSC_VER > 1800 +#pragma warning(disable : 4464) /* relative include path contains '..' */ +#endif +#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ +#endif /* _MSC_VER (warnings) */ + +#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ +#include "internals.h" + +#if defined(_WIN32) || defined(_WIN64) +#include "wingetopt.h" + +static volatile BOOL user_break; +static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { + (void)dwCtrlType; + user_break = true; + return true; +} + +#else /* WINDOWS */ + +static volatile sig_atomic_t user_break; +static void signal_handler(int sig) { + (void)sig; + user_break = 1; +} + +#endif /* !WINDOWS */ + +static void prstat(MDBX_stat *ms) { + printf(" Pagesize: %u\n", ms->ms_psize); + printf(" Tree depth: %u\n", ms->ms_depth); + printf(" Branch pages: %" PRIu64 "\n", ms->ms_branch_pages); + printf(" Leaf pages: %" PRIu64 "\n", ms->ms_leaf_pages); + printf(" Overflow pages: %" PRIu64 "\n", ms->ms_overflow_pages); + printf(" Entries: %" PRIu64 "\n", ms->ms_entries); +} + +static void usage(char *prog) { + fprintf(stderr, + "usage: %s [-V] [-e] [-f[f[f]]] [-r[r]] [-a|-s name] [-n] dbpath\n" + " -V\t\tprint version and exit\n" + " -e\t\tshow whole DB info\n" + " -f\t\tshow GC info\n" + " -r\t\tshow readers\n" + " -a\t\tprint stat of main DB and all subDBs\n" + " \t\t(default) print stat of only the main DB\n" + " -s name\tprint stat of only the named subDB\n" + " -n\t\tNOSUBDIR mode for open\n", + prog); + exit(EXIT_FAILURE); +} + +static int reader_list_func(void *ctx, int num, int slot, mdbx_pid_t pid, + mdbx_tid_t thread, uint64_t txnid, uint64_t lag, + size_t bytes_used, size_t bytes_retained) { + (void)ctx; + if (num == 1) + printf("Reader Table\n" + " #\tslot\t%6s %*s %20s %10s %13s %13s\n", + "pid", (int)sizeof(size_t) * 2, "thread", "txnid", "lag", "used", + "retained"); + + printf(" %3d)\t[%d]\t%6" PRIdSIZE " %*" PRIxPTR, num, slot, (size_t)pid, + (int)sizeof(size_t) * 2, (uintptr_t)thread); + if (txnid) + printf(" %20" PRIu64 " %10" PRIu64 " %12.1fM %12.1fM\n", txnid, lag, + bytes_used / 1048576.0, bytes_retained / 1048576.0); + else + printf(" %20s %10s %13s %13s\n", "-", "0", "0", "0"); + + return user_break ? MDBX_RESULT_TRUE : MDBX_RESULT_FALSE; +} + +int main(int argc, char *argv[]) { + int o, rc; + MDBX_env *env; + MDBX_txn *txn; + MDBX_dbi dbi; + MDBX_stat mst; + MDBX_envinfo mei; + char *prog = argv[0]; + char *envname; + char *subname = NULL; + int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0; + + if (argc < 2) + usage(prog); + + while ((o = getopt(argc, argv, "Vaefnrs:")) != EOF) { + switch (o) { + case 'V': + printf("mdbx_stat version %d.%d.%d.%d\n" + " - source: %s %s, commit %s, tree %s\n" + " - anchor: %s\n" + " - build: %s for %s by %s\n" + " - flags: %s\n" + " - options: %s\n", + mdbx_version.major, mdbx_version.minor, mdbx_version.release, + mdbx_version.revision, mdbx_version.git.describe, + mdbx_version.git.datetime, mdbx_version.git.commit, + mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, + mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, + mdbx_build.options); + return EXIT_SUCCESS; + case 'a': + if (subname) + usage(prog); + alldbs++; + break; + case 'e': + envinfo++; + break; + case 'f': + freinfo++; + break; + case 'n': + envflags |= MDBX_NOSUBDIR; + break; + case 'r': + rdrinfo++; + break; + case 's': + if (alldbs) + usage(prog); + subname = optarg; + break; + default: + usage(prog); + } + } + + if (optind != argc - 1) + usage(prog); + +#if defined(_WIN32) || defined(_WIN64) + SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); +#else +#ifdef SIGPIPE + signal(SIGPIPE, signal_handler); +#endif +#ifdef SIGHUP + signal(SIGHUP, signal_handler); +#endif + signal(SIGINT, signal_handler); + signal(SIGTERM, signal_handler); +#endif /* !WINDOWS */ + + envname = argv[optind]; + envname = argv[optind]; + printf("mdbx_stat %s (%s, T-%s)\nRunning for %s...\n", + mdbx_version.git.describe, mdbx_version.git.datetime, + mdbx_version.git.tree, envname); + fflush(NULL); + + rc = mdbx_env_create(&env); + if (rc) { + fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc, + mdbx_strerror(rc)); + return EXIT_FAILURE; + } + + if (alldbs || subname) + mdbx_env_set_maxdbs(env, 4); + + rc = mdbx_env_open(env, envname, envflags | MDBX_RDONLY, 0664); + if (rc) { + fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + + rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn); + if (rc) { + fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + + if (envinfo || freinfo) { + (void)mdbx_env_info_ex(env, txn, &mei, sizeof(mei)); + } else { + /* LY: zap warnings from gcc */ + memset(&mei, 0, sizeof(mei)); + } + + if (envinfo) { + (void)mdbx_env_stat_ex(env, txn, &mst, sizeof(mst)); + printf("Environment Info\n"); + printf(" Pagesize: %u\n", mst.ms_psize); + if (mei.mi_geo.lower != mei.mi_geo.upper) { + printf(" Dynamic datafile: %" PRIu64 "..%" PRIu64 " bytes (+%" PRIu64 + "/-%" PRIu64 "), %" PRIu64 "..%" PRIu64 " pages (+%" PRIu64 + "/-%" PRIu64 ")\n", + mei.mi_geo.lower, mei.mi_geo.upper, mei.mi_geo.grow, + mei.mi_geo.shrink, mei.mi_geo.lower / mst.ms_psize, + mei.mi_geo.upper / mst.ms_psize, mei.mi_geo.grow / mst.ms_psize, + mei.mi_geo.shrink / mst.ms_psize); + printf(" Current mapsize: %" PRIu64 " bytes, %" PRIu64 " pages \n", + mei.mi_mapsize, mei.mi_mapsize / mst.ms_psize); + printf(" Current datafile: %" PRIu64 " bytes, %" PRIu64 " pages\n", + mei.mi_geo.current, mei.mi_geo.current / mst.ms_psize); +#if defined(_WIN32) || defined(_WIN64) + if (mei.mi_geo.shrink && mei.mi_geo.current != mei.mi_geo.upper) + printf(" WARNING: Due Windows system limitations a " + "file couldn't\n be truncated while database " + "is opened. So, the size of\n database file " + "may by large than the database itself,\n " + "until it will be closed or reopened in read-write mode.\n"); +#endif + } else { + printf(" Fixed datafile: %" PRIu64 " bytes, %" PRIu64 " pages\n", + mei.mi_geo.current, mei.mi_geo.current / mst.ms_psize); + } + printf(" Last transaction ID: %" PRIu64 "\n", mei.mi_recent_txnid); + printf(" Latter reader transaction ID: %" PRIu64 " (%" PRIi64 ")\n", + mei.mi_latter_reader_txnid, + mei.mi_latter_reader_txnid - mei.mi_recent_txnid); + printf(" Max readers: %u\n", mei.mi_maxreaders); + printf(" Number of reader slots uses: %u\n", mei.mi_numreaders); + } else { + /* LY: zap warnings from gcc */ + memset(&mst, 0, sizeof(mst)); + } + + if (rdrinfo) { + rc = mdbx_reader_list(env, reader_list_func, nullptr); + if (rc == MDBX_RESULT_TRUE) + printf("Reader Table is empty\n"); + else if (rc == MDBX_SUCCESS && rdrinfo > 1) { + int dead; + rc = mdbx_reader_check(env, &dead); + if (rc == MDBX_RESULT_TRUE) { + printf(" %d stale readers cleared.\n", dead); + rc = mdbx_reader_list(env, reader_list_func, nullptr); + if (rc == MDBX_RESULT_TRUE) + printf(" Now Reader Table is empty\n"); + } else + printf(" No stale readers.\n"); + } + if (MDBX_IS_ERROR(rc)) { + fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto env_close; + } + if (!(subname || alldbs || freinfo)) + goto env_close; + } + + if (freinfo) { + MDBX_cursor *cursor; + MDBX_val key, data; + pgno_t pages = 0, *iptr; + pgno_t reclaimable = 0; + + printf("Garbage Collection\n"); + dbi = 0; + rc = mdbx_cursor_open(txn, dbi, &cursor); + if (rc) { + fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + rc = mdbx_dbi_stat(txn, dbi, &mst, sizeof(mst)); + if (rc) { + fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + prstat(&mst); + while ((rc = mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT)) == + MDBX_SUCCESS) { + if (user_break) { + rc = MDBX_EINTR; + break; + } + iptr = data.iov_base; + const pgno_t number = *iptr++; + + pages += number; + if (envinfo && mei.mi_latter_reader_txnid > *(txnid_t *)key.iov_base) + reclaimable += number; + + if (freinfo > 1) { + char *bad = ""; + pgno_t prev = + MDBX_PNL_ASCENDING ? NUM_METAS - 1 : (pgno_t)mei.mi_last_pgno + 1; + pgno_t span = 1; + for (unsigned i = 0; i < number; ++i) { + pgno_t pg = iptr[i]; + if (MDBX_PNL_DISORDERED(prev, pg)) + bad = " [bad sequence]"; + prev = pg; + while (i + span < number && + iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pg, span) + : pgno_sub(pg, span))) + ++span; + } + printf(" Transaction %" PRIaTXN ", %" PRIaPGNO + " pages, maxspan %" PRIaPGNO "%s\n", + *(txnid_t *)key.iov_base, number, span, bad); + if (freinfo > 2) { + for (unsigned i = 0; i < number; i += span) { + const pgno_t pg = iptr[i]; + for (span = 1; + i + span < number && + iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pg, span) + : pgno_sub(pg, span)); + ++span) + ; + if (span > 1) + printf(" %9" PRIaPGNO "[%" PRIaPGNO "]\n", pg, span); + else + printf(" %9" PRIaPGNO "\n", pg); + } + } + } + } + mdbx_cursor_close(cursor); + + switch (rc) { + case MDBX_SUCCESS: + case MDBX_NOTFOUND: + break; + case MDBX_EINTR: + fprintf(stderr, "Interrupted by signal/user\n"); + goto txn_abort; + default: + fprintf(stderr, "mdbx_cursor_get failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + + if (envinfo) { + uint64_t value = mei.mi_mapsize / mst.ms_psize; + double percent = value / 100.0; + printf("Page Usage\n"); + printf(" Total: %" PRIu64 " 100%%\n", value); + + value = mei.mi_geo.current / mst.ms_psize; + printf(" Backed: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = mei.mi_last_pgno + 1; + printf(" Allocated: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = mei.mi_mapsize / mst.ms_psize - (mei.mi_last_pgno + 1); + printf(" Remained: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = mei.mi_last_pgno + 1 - pages; + printf(" Used: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = pages; + printf(" GC: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = pages - reclaimable; + printf(" Detained: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = reclaimable; + printf(" Reclaimable: %" PRIu64 " %.1f%%\n", value, value / percent); + + value = + mei.mi_mapsize / mst.ms_psize - (mei.mi_last_pgno + 1) + reclaimable; + printf(" Available: %" PRIu64 " %.1f%%\n", value, value / percent); + } else + printf(" GC: %" PRIaPGNO " pages\n", pages); + } + + rc = mdbx_dbi_open(txn, subname, 0, &dbi); + if (rc) { + fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc)); + goto txn_abort; + } + + rc = mdbx_dbi_stat(txn, dbi, &mst, sizeof(mst)); + if (rc) { + fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + printf("Status of %s\n", subname ? subname : "Main DB"); + prstat(&mst); + + if (alldbs) { + MDBX_cursor *cursor; + MDBX_val key; + + rc = mdbx_cursor_open(txn, dbi, &cursor); + if (rc) { + fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + while ((rc = mdbx_cursor_get(cursor, &key, NULL, MDBX_NEXT_NODUP)) == 0) { + char *str; + MDBX_dbi db2; + if (memchr(key.iov_base, '\0', key.iov_len)) + continue; + str = mdbx_malloc(key.iov_len + 1); + memcpy(str, key.iov_base, key.iov_len); + str[key.iov_len] = '\0'; + rc = mdbx_dbi_open(txn, str, 0, &db2); + if (rc == MDBX_SUCCESS) + printf("Status of %s\n", str); + mdbx_free(str); + if (rc) + continue; + rc = mdbx_dbi_stat(txn, db2, &mst, sizeof(mst)); + if (rc) { + fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc, + mdbx_strerror(rc)); + goto txn_abort; + } + prstat(&mst); + mdbx_dbi_close(env, db2); + } + mdbx_cursor_close(cursor); + } + + if (rc == MDBX_NOTFOUND) + rc = MDBX_SUCCESS; + + mdbx_dbi_close(env, dbi); +txn_abort: + mdbx_txn_abort(txn); +env_close: + mdbx_env_close(env); + + return rc ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/libs/libmdbx/src/src/ntdll.def b/libs/libmdbx/src/src/ntdll.def new file mode 100644 index 0000000000..e3a6e33c94 --- /dev/null +++ b/libs/libmdbx/src/src/ntdll.def @@ -0,0 +1,1244 @@ +LIBRARY ntdll +EXPORTS +CsrAllocateCaptureBuffer +CsrAllocateMessagePointer +CsrCaptureMessageBuffer +CsrCaptureMessageMultiUnicodeStringsInPlace +CsrCaptureMessageString +CsrCaptureTimeout +CsrClientCallServer +CsrClientConnectToServer +CsrFreeCaptureBuffer +CsrGetProcessId +CsrIdentifyAlertableThread +CsrSetPriorityClass +DbgBreakPoint +DbgPrint +DbgPrintEx +DbgPrintReturnControlC +DbgPrompt +DbgQueryDebugFilterState +DbgSetDebugFilterState +DbgUiConnectToDbg +DbgUiContinue +DbgUiConvertStateChangeStructure +DbgUiDebugActiveProcess +DbgUiGetThreadDebugObject +DbgUiIssueRemoteBreakin +DbgUiRemoteBreakin +DbgUiSetThreadDebugObject +DbgUiStopDebugging +DbgUiWaitStateChange +DbgUserBreakPoint +KiRaiseUserExceptionDispatcher +KiUserApcDispatcher +KiUserCallbackDispatcher +KiUserExceptionDispatcher +LdrAccessResource +LdrAddRefDll +LdrDisableThreadCalloutsForDll +LdrEnumResources +LdrEnumerateLoadedModules +LdrFindEntryForAddress +LdrFindResourceDirectory_U +LdrFindResourceEx_U +LdrFindResource_U +LdrFlushAlternateResourceModules +LdrGetDllHandle +LdrGetDllHandleEx +LdrGetProcedureAddress +LdrInitShimEngineDynamic +LdrInitializeThunk +LdrLoadAlternateResourceModule +LdrLoadDll +LdrLockLoaderLock +LdrProcessRelocationBlock +LdrQueryImageFileExecutionOptions +LdrQueryProcessModuleInformation +LdrSetAppCompatDllRedirectionCallback +LdrSetDllManifestProber +LdrShutdownProcess +LdrShutdownThread +LdrUnloadAlternateResourceModule +LdrUnloadDll +LdrUnlockLoaderLock +LdrVerifyImageMatchesChecksum +NlsAnsiCodePage +NlsMbCodePageTag +NlsMbOemCodePageTag +NtAcceptConnectPort +NtAccessCheck +NtAccessCheckAndAuditAlarm +NtAccessCheckByType +NtAccessCheckByTypeAndAuditAlarm +NtAccessCheckByTypeResultList +NtAccessCheckByTypeResultListAndAuditAlarm +NtAccessCheckByTypeResultListAndAuditAlarmByHandle +NtAddAtom +NtAddBootEntry +NtAdjustGroupsToken +NtAdjustPrivilegesToken +NtAlertResumeThread +NtAlertThread +NtAllocateLocallyUniqueId +NtAllocateUserPhysicalPages +NtAllocateUuids +NtAllocateVirtualMemory +NtAreMappedFilesTheSame +NtAssignProcessToJobObject +NtCallbackReturn +NtCancelIoFile +NtCancelTimer +NtClearEvent +NtClose +NtCloseObjectAuditAlarm +NtCompactKeys +NtCompareTokens +NtCompleteConnectPort +NtCompressKey +NtConnectPort +NtContinue +NtCreateDebugObject +NtCreateDirectoryObject +NtCreateEvent +NtCreateEventPair +NtCreateFile +NtCreateIoCompletion +NtCreateJobObject +NtCreateJobSet +NtCreateKey +NtCreateKeyedEvent +NtCreateMailslotFile +NtCreateMutant +NtCreateNamedPipeFile +NtCreatePagingFile +NtCreatePort +NtCreateProcess +NtCreateProcessEx +NtCreateProfile +NtCreateSection +NtCreateSemaphore +NtCreateSymbolicLinkObject +NtCreateThread +NtCreateTimer +NtCreateToken +NtCreateWaitablePort +NtDebugActiveProcess +NtDebugContinue +NtDelayExecution +NtDeleteAtom +NtDeleteBootEntry +NtDeleteFile +NtDeleteKey +NtDeleteObjectAuditAlarm +NtDeleteValueKey +NtDeviceIoControlFile +NtDisplayString +NtDuplicateObject +NtDuplicateToken +NtEnumerateBootEntries +NtEnumerateKey +NtEnumerateSystemEnvironmentValuesEx +NtEnumerateValueKey +NtExtendSection +NtFilterToken +NtFindAtom +NtFlushBuffersFile +NtFlushInstructionCache +NtFlushKey +NtFlushVirtualMemory +NtFlushWriteBuffer +NtFreeUserPhysicalPages +NtFreeVirtualMemory +NtFsControlFile +NtGetContextThread +NtGetDevicePowerState +NtGetWriteWatch +NtImpersonateAnonymousToken +NtImpersonateClientOfPort +NtImpersonateThread +NtInitializeRegistry +NtInitiatePowerAction +NtIsProcessInJob +NtIsSystemResumeAutomatic +NtListenPort +NtLoadDriver +NtLoadKey +NtLoadKey2 +NtLockFile +NtLockProductActivationKeys +NtLockRegistryKey +NtLockVirtualMemory +NtMakePermanentObject +NtMakeTemporaryObject +NtMapUserPhysicalPages +NtMapUserPhysicalPagesScatter +NtMapViewOfSection +NtModifyBootEntry +NtNotifyChangeDirectoryFile +NtNotifyChangeKey +NtNotifyChangeMultipleKeys +NtOpenDirectoryObject +NtOpenEvent +NtOpenEventPair +NtOpenFile +NtOpenIoCompletion +NtOpenJobObject +NtOpenKey +NtOpenKeyedEvent +NtOpenMutant +NtOpenObjectAuditAlarm +NtOpenProcess +NtOpenProcessToken +NtOpenProcessTokenEx +NtOpenSection +NtOpenSemaphore +NtOpenSymbolicLinkObject +NtOpenThread +NtOpenThreadToken +NtOpenThreadTokenEx +NtOpenTimer +NtPlugPlayControl +NtPowerInformation +NtPrivilegeCheck +NtPrivilegeObjectAuditAlarm +NtPrivilegedServiceAuditAlarm +NtProtectVirtualMemory +NtPulseEvent +NtQueryAttributesFile +NtQueryBootEntryOrder +NtQueryBootOptions +NtQueryDebugFilterState +NtQueryDefaultLocale +NtQueryDefaultUILanguage +NtQueryDirectoryFile +NtQueryDirectoryObject +NtQueryEaFile +NtQueryEvent +NtQueryFullAttributesFile +NtQueryInformationAtom +NtQueryInformationFile +NtQueryInformationJobObject +NtQueryInformationPort +NtQueryInformationProcess +NtQueryInformationThread +NtQueryInformationToken +NtQueryInstallUILanguage +NtQueryIntervalProfile +NtQueryIoCompletion +NtQueryKey +NtQueryMultipleValueKey +NtQueryMutant +NtQueryObject +NtQueryOpenSubKeys +NtQueryPerformanceCounter +NtQueryPortInformationProcess +NtQueryQuotaInformationFile +NtQuerySection +NtQuerySecurityObject +NtQuerySemaphore +NtQuerySymbolicLinkObject +NtQuerySystemEnvironmentValue +NtQuerySystemEnvironmentValueEx +NtQuerySystemInformation +NtQuerySystemTime +NtQueryTimer +NtQueryTimerResolution +NtQueryValueKey +NtQueryVirtualMemory +NtQueryVolumeInformationFile +NtQueueApcThread +NtRaiseException +NtRaiseHardError +NtReadFile +NtReadFileScatter +NtReadRequestData +NtReadVirtualMemory +NtRegisterThreadTerminatePort +NtReleaseKeyedEvent +NtReleaseMutant +NtReleaseSemaphore +NtRemoveIoCompletion +NtRemoveProcessDebug +NtRenameKey +NtReplaceKey +NtReplyPort +NtReplyWaitReceivePort +NtReplyWaitReceivePortEx +NtReplyWaitReplyPort +NtRequestPort +NtRequestWaitReplyPort +NtResetEvent +NtResetWriteWatch +NtRestoreKey +NtResumeProcess +NtResumeThread +NtSaveKey +NtSaveKeyEx +NtSaveMergedKeys +NtSecureConnectPort +NtSetBootEntryOrder +NtSetBootOptions +NtSetContextThread +NtSetDebugFilterState +NtSetDefaultHardErrorPort +NtSetDefaultLocale +NtSetDefaultUILanguage +NtSetEaFile +NtSetEvent +NtSetEventBoostPriority +NtSetHighEventPair +NtSetHighWaitLowEventPair +NtSetInformationDebugObject +NtSetInformationFile +NtSetInformationJobObject +NtSetInformationKey +NtSetInformationObject +NtSetInformationProcess +NtSetInformationThread +NtSetInformationToken +NtSetIntervalProfile +NtSetIoCompletion +NtSetLdtEntries +NtSetLowEventPair +NtSetLowWaitHighEventPair +NtSetQuotaInformationFile +NtSetSecurityObject +NtSetSystemEnvironmentValue +NtSetSystemEnvironmentValueEx +NtSetSystemInformation +NtSetSystemPowerState +NtSetSystemTime +NtSetThreadExecutionState +NtSetTimer +NtSetTimerResolution +NtSetUuidSeed +NtSetValueKey +NtSetVolumeInformationFile +NtShutdownSystem +NtSignalAndWaitForSingleObject +NtStartProfile +NtStopProfile +NtSuspendProcess +NtSuspendThread +NtSystemDebugControl +NtTerminateJobObject +NtTerminateProcess +NtTerminateThread +NtTestAlert +NtTraceEvent +NtTranslateFilePath +NtUnloadDriver +NtUnloadKey +NtUnloadKeyEx +NtUnlockFile +NtUnlockVirtualMemory +NtUnmapViewOfSection +NtVdmControl +NtWaitForDebugEvent +NtWaitForKeyedEvent +NtWaitForMultipleObjects +NtWaitForSingleObject +NtWaitHighEventPair +NtWaitLowEventPair +NtWriteFile +NtWriteFileGather +NtWriteRequestData +NtWriteVirtualMemory +NtYieldExecution +PfxFindPrefix +PfxInitialize +PfxInsertPrefix +PfxRemovePrefix +RtlAbortRXact +RtlAbsoluteToSelfRelativeSD +RtlAcquirePebLock +RtlAcquireResourceExclusive +RtlAcquireResourceShared +RtlActivateActivationContext +RtlActivateActivationContextEx +RtlActivateActivationContextUnsafeFast +RtlAddAccessAllowedAce +RtlAddAccessAllowedAceEx +RtlAddAccessAllowedObjectAce +RtlAddAccessDeniedAce +RtlAddAccessDeniedAceEx +RtlAddAccessDeniedObjectAce +RtlAddAce +RtlAddActionToRXact +RtlAddAtomToAtomTable +RtlAddAttributeActionToRXact +RtlAddAuditAccessAce +RtlAddAuditAccessAceEx +RtlAddAuditAccessObjectAce +RtlAddCompoundAce +RtlAddRefActivationContext +RtlAddRefMemoryStream +RtlAddVectoredExceptionHandler +RtlAddressInSectionTable +RtlAdjustPrivilege +RtlAllocateAndInitializeSid +RtlAllocateHandle +RtlAllocateHeap +RtlAnsiCharToUnicodeChar +RtlAnsiStringToUnicodeSize +RtlAnsiStringToUnicodeString +RtlAppendAsciizToString +RtlAppendPathElement +RtlAppendStringToString +RtlAppendUnicodeStringToString +RtlAppendUnicodeToString +RtlApplicationVerifierStop +RtlApplyRXact +RtlApplyRXactNoFlush +RtlAreAllAccessesGranted +RtlAreAnyAccessesGranted +RtlAreBitsClear +RtlAreBitsSet +RtlAssert +RtlCancelTimer +RtlCaptureContext +RtlCaptureStackBackTrace +RtlCharToInteger +RtlCheckForOrphanedCriticalSections +RtlCheckRegistryKey +RtlClearAllBits +RtlClearBits +RtlCloneMemoryStream +RtlCommitMemoryStream +RtlCompactHeap +RtlCompareMemory +RtlCompareMemoryUlong +RtlCompareString +RtlCompareUnicodeString +RtlCompressBuffer +RtlComputeCrc32 +RtlComputeImportTableHash +RtlComputePrivatizedDllName_U +RtlConsoleMultiByteToUnicodeN +RtlConvertExclusiveToShared +RtlConvertSharedToExclusive +RtlConvertSidToUnicodeString +RtlConvertToAutoInheritSecurityObject +RtlCopyLuid +RtlCopyLuidAndAttributesArray +RtlCopyMemoryStreamTo +RtlCopyOutOfProcessMemoryStreamTo +RtlCopySecurityDescriptor +RtlCopySid +RtlCopySidAndAttributesArray +RtlCopyString +RtlCopyUnicodeString +RtlCreateAcl +RtlCreateActivationContext +RtlCreateAndSetSD +RtlCreateAtomTable +RtlCreateBootStatusDataFile +RtlCreateEnvironment +RtlCreateHeap +RtlCreateProcessParameters +RtlCreateQueryDebugBuffer +RtlCreateRegistryKey +RtlCreateSecurityDescriptor +RtlCreateServiceSid +RtlCreateSystemVolumeInformationFolder +RtlCreateTagHeap +RtlCreateTimer +RtlCreateTimerQueue +RtlCreateUnicodeString +RtlCreateUnicodeStringFromAsciiz +RtlCreateUserProcess +RtlCreateUserSecurityObject +RtlCreateUserThread +RtlCustomCPToUnicodeN +RtlCutoverTimeToSystemTime +RtlDeNormalizeProcessParams +RtlDeactivateActivationContext +RtlDeactivateActivationContextUnsafeFast +RtlDebugPrintTimes +RtlDecodePointer +RtlDecodeSystemPointer +RtlDecompressBuffer +RtlDecompressFragment +RtlDefaultNpAcl +RtlDelete +RtlDeleteAce +RtlDeleteAtomFromAtomTable +RtlDeleteCriticalSection +RtlDeleteElementGenericTable +RtlDeleteElementGenericTableAvl +RtlDeleteNoSplay +RtlDeleteRegistryValue +RtlDeleteResource +RtlDeleteSecurityObject +RtlDeleteTimer +RtlDeleteTimerQueue +RtlDeleteTimerQueueEx +RtlDeregisterWait +RtlDeregisterWaitEx +RtlDestroyAtomTable +RtlDestroyEnvironment +RtlDestroyHandleTable +RtlDestroyHeap +RtlDestroyProcessParameters +RtlDestroyQueryDebugBuffer +RtlDetermineDosPathNameType_U +RtlDllShutdownInProgress +RtlDnsHostNameToComputerName +RtlDoesFileExists_U +RtlDosApplyFileIsolationRedirection_Ustr +RtlDosPathNameToNtPathName_U +RtlDosSearchPath_U +RtlDosSearchPath_Ustr +RtlDowncaseUnicodeChar +RtlDowncaseUnicodeString +RtlDumpResource +RtlDuplicateUnicodeString +RtlEmptyAtomTable +RtlEnableEarlyCriticalSectionEventCreation +RtlEncodePointer +RtlEncodeSystemPointer +RtlEnterCriticalSection +RtlEnumProcessHeaps +RtlEnumerateGenericTable +RtlEnumerateGenericTableAvl +RtlEnumerateGenericTableLikeADirectory +RtlEnumerateGenericTableWithoutSplaying +RtlEnumerateGenericTableWithoutSplayingAvl +RtlEqualComputerName +RtlEqualDomainName +RtlEqualLuid +RtlEqualPrefixSid +RtlEqualSid +RtlEqualString +RtlEqualUnicodeString +RtlEraseUnicodeString +RtlExitUserThread +RtlExpandEnvironmentStrings_U +RtlFillMemory +RtlFinalReleaseOutOfProcessMemoryStream +RtlFindActivationContextSectionGuid +RtlFindActivationContextSectionString +RtlFindCharInUnicodeString +RtlFindClearBits +RtlFindClearBitsAndSet +RtlFindClearRuns +RtlFindLastBackwardRunClear +RtlFindLeastSignificantBit +RtlFindLongestRunClear +RtlFindMessage +RtlFindMostSignificantBit +RtlFindNextForwardRunClear +RtlFindSetBits +RtlFindSetBitsAndClear +RtlFirstEntrySList +RtlFirstFreeAce +RtlFlushSecureMemoryCache +RtlFormatCurrentUserKeyPath +RtlFormatMessage +RtlFreeAnsiString +RtlFreeHandle +RtlFreeHeap +RtlFreeOemString +RtlFreeSid +RtlFreeThreadActivationContextStack +RtlFreeUnicodeString +RtlGUIDFromString +RtlGenerate8dot3Name +RtlGetAce +RtlGetActiveActivationContext +RtlGetCallersAddress +RtlGetCompressionWorkSpaceSize +RtlGetControlSecurityDescriptor +RtlGetCurrentDirectory_U +RtlGetCurrentPeb +RtlGetDaclSecurityDescriptor +RtlGetElementGenericTable +RtlGetElementGenericTableAvl +RtlGetFrame +RtlGetFullPathName_U +RtlGetGroupSecurityDescriptor +RtlGetLastNtStatus +RtlGetLastWin32Error +RtlGetLengthWithoutLastFullDosOrNtPathElement +RtlGetLengthWithoutTrailingPathSeperators +RtlGetLongestNtPathLength +RtlGetNativeSystemInformation +RtlGetNtGlobalFlags +RtlGetNtProductType +RtlGetNtVersionNumbers +RtlGetOwnerSecurityDescriptor +RtlGetProcessHeaps +RtlGetSaclSecurityDescriptor +RtlGetSecurityDescriptorRMControl +RtlGetSetBootStatusData +RtlGetUnloadEventTrace +RtlGetUserInfoHeap +RtlGetVersion +RtlHashUnicodeString +RtlIdentifierAuthoritySid +RtlImageDirectoryEntryToData +RtlImageNtHeader +RtlImageRvaToSection +RtlImageRvaToVa +RtlImpersonateSelf +RtlInitAnsiString +RtlInitCodePageTable +RtlInitMemoryStream +RtlInitNlsTables +RtlInitOutOfProcessMemoryStream +RtlInitString +RtlInitUnicodeString +RtlInitUnicodeStringEx +RtlInitializeAtomPackage +RtlInitializeBitMap +RtlInitializeContext +RtlInitializeCriticalSection +RtlInitializeCriticalSectionAndSpinCount +RtlInitializeGenericTable +RtlInitializeGenericTableAvl +RtlInitializeHandleTable +RtlInitializeRXact +RtlInitializeResource +RtlInitializeSListHead +RtlInitializeSid +RtlInsertElementGenericTable +RtlInsertElementGenericTableAvl +RtlInt64ToUnicodeString +RtlIntegerToChar +RtlIntegerToUnicodeString +RtlInterlockedFlushSList +RtlInterlockedPopEntrySList +RtlInterlockedPushEntrySList +RtlInterlockedPushListSList +RtlIpv4AddressToStringA +RtlIpv4AddressToStringExA +RtlIpv4AddressToStringExW +RtlIpv4AddressToStringW +RtlIpv4StringToAddressA +RtlIpv4StringToAddressExA +RtlIpv4StringToAddressExW +RtlIpv4StringToAddressW +RtlIpv6AddressToStringA +RtlIpv6AddressToStringExA +RtlIpv6AddressToStringExW +RtlIpv6AddressToStringW +RtlIpv6StringToAddressA +RtlIpv6StringToAddressExA +RtlIpv6StringToAddressExW +RtlIpv6StringToAddressW +RtlIsActivationContextActive +RtlIsDosDeviceName_U +RtlIsGenericTableEmpty +RtlIsGenericTableEmptyAvl +RtlIsNameLegalDOS8Dot3 +RtlIsTextUnicode +RtlIsThreadWithinLoaderCallout +RtlIsValidHandle +RtlIsValidIndexHandle +RtlLargeIntegerToChar +RtlLeaveCriticalSection +RtlLengthRequiredSid +RtlLengthSecurityDescriptor +RtlLengthSid +RtlLocalTimeToSystemTime +RtlLockBootStatusData +RtlLockHeap +RtlLockMemoryStreamRegion +RtlLogStackBackTrace +RtlLookupAtomInAtomTable +RtlLookupElementGenericTable +RtlLookupElementGenericTableAvl +RtlMakeSelfRelativeSD +RtlMapGenericMask +RtlMapSecurityErrorToNtStatus +RtlMoveMemory +RtlMultiAppendUnicodeStringBuffer +RtlMultiByteToUnicodeN +RtlMultiByteToUnicodeSize +RtlNewInstanceSecurityObject +RtlNewSecurityGrantedAccess +RtlNewSecurityObject +RtlNewSecurityObjectEx +RtlNewSecurityObjectWithMultipleInheritance +RtlNormalizeProcessParams +RtlNtPathNameToDosPathName +RtlNtStatusToDosError +RtlNtStatusToDosErrorNoTeb +RtlNumberGenericTableElements +RtlNumberGenericTableElementsAvl +RtlNumberOfClearBits +RtlNumberOfSetBits +RtlOemStringToUnicodeSize +RtlOemStringToUnicodeString +RtlOemToUnicodeN +RtlOpenCurrentUser +RtlPcToFileHeader +RtlPinAtomInAtomTable +RtlPopFrame +RtlPrefixString +RtlPrefixUnicodeString +RtlProtectHeap +RtlPushFrame +RtlQueryAtomInAtomTable +RtlQueryDepthSList +RtlQueryEnvironmentVariable_U +RtlQueryHeapInformation +RtlQueryInformationAcl +RtlQueryInformationActivationContext +RtlQueryInformationActiveActivationContext +RtlQueryInterfaceMemoryStream +RtlQueryProcessBackTraceInformation +RtlQueryProcessDebugInformation +RtlQueryProcessHeapInformation +RtlQueryProcessLockInformation +RtlQueryRegistryValues +RtlQuerySecurityObject +RtlQueryTagHeap +RtlQueryTimeZoneInformation +RtlQueueApcWow64Thread +RtlQueueWorkItem +RtlRaiseException +RtlRaiseStatus +RtlRandom +RtlRandomEx +RtlReAllocateHeap +RtlReadMemoryStream +RtlReadOutOfProcessMemoryStream +RtlRealPredecessor +RtlRealSuccessor +RtlRegisterSecureMemoryCacheCallback +RtlRegisterWait +RtlReleaseActivationContext +RtlReleaseMemoryStream +RtlReleasePebLock +RtlReleaseResource +RtlRemoteCall +RtlRemoveVectoredExceptionHandler +RtlResetRtlTranslations +RtlRestoreLastWin32Error +RtlRevertMemoryStream +RtlRunDecodeUnicodeString +RtlRunEncodeUnicodeString +RtlSecondsSince1970ToTime +RtlSecondsSince1980ToTime +RtlSeekMemoryStream +RtlSelfRelativeToAbsoluteSD +RtlSelfRelativeToAbsoluteSD2 +RtlSetAllBits +RtlSetAttributesSecurityDescriptor +RtlSetBits +RtlSetControlSecurityDescriptor +RtlSetCriticalSectionSpinCount +RtlSetCurrentDirectory_U +RtlSetCurrentEnvironment +RtlSetDaclSecurityDescriptor +RtlSetEnvironmentVariable +RtlSetGroupSecurityDescriptor +RtlSetHeapInformation +RtlSetInformationAcl +RtlSetIoCompletionCallback +RtlSetLastWin32Error +RtlSetLastWin32ErrorAndNtStatusFromNtStatus +RtlSetMemoryStreamSize +RtlSetOwnerSecurityDescriptor +RtlSetProcessIsCritical +RtlSetSaclSecurityDescriptor +RtlSetSecurityDescriptorRMControl +RtlSetSecurityObject +RtlSetSecurityObjectEx +RtlSetThreadIsCritical +RtlSetThreadPoolStartFunc +RtlSetTimeZoneInformation +RtlSetTimer +RtlSetUserFlagsHeap +RtlSetUserValueHeap +RtlSizeHeap +RtlSplay +RtlStartRXact +RtlStatMemoryStream +RtlStringFromGUID +RtlSubAuthorityCountSid +RtlSubAuthoritySid +RtlSubtreePredecessor +RtlSubtreeSuccessor +RtlSystemTimeToLocalTime +RtlTimeFieldsToTime +RtlTimeToElapsedTimeFields +RtlTimeToSecondsSince1970 +RtlTimeToSecondsSince1980 +RtlTimeToTimeFields +RtlTraceDatabaseAdd +RtlTraceDatabaseCreate +RtlTraceDatabaseDestroy +RtlTraceDatabaseEnumerate +RtlTraceDatabaseFind +RtlTraceDatabaseLock +RtlTraceDatabaseUnlock +RtlTraceDatabaseValidate +RtlTryEnterCriticalSection +RtlUnhandledExceptionFilter +RtlUnhandledExceptionFilter2 +RtlUnicodeStringToAnsiSize +RtlUnicodeStringToAnsiString +RtlUnicodeStringToCountedOemString +RtlUnicodeStringToInteger +RtlUnicodeStringToOemSize +RtlUnicodeStringToOemString +RtlUnicodeToCustomCPN +RtlUnicodeToMultiByteN +RtlUnicodeToMultiByteSize +RtlUnicodeToOemN +RtlUniform +RtlUnlockBootStatusData +RtlUnlockHeap +RtlUnlockMemoryStreamRegion +RtlUnwind +RtlUpcaseUnicodeChar +RtlUpcaseUnicodeString +RtlUpcaseUnicodeStringToAnsiString +RtlUpcaseUnicodeStringToCountedOemString +RtlUpcaseUnicodeStringToOemString +RtlUpcaseUnicodeToCustomCPN +RtlUpcaseUnicodeToMultiByteN +RtlUpcaseUnicodeToOemN +RtlUpdateTimer +RtlUpperChar +RtlUpperString +RtlValidAcl +RtlValidRelativeSecurityDescriptor +RtlValidSecurityDescriptor +RtlValidSid +RtlValidateHeap +RtlValidateProcessHeaps +RtlValidateUnicodeString +RtlVerifyVersionInfo +RtlWalkFrameChain +RtlWalkHeap +RtlWriteMemoryStream +RtlWriteRegistryValue +RtlZeroHeap +RtlZeroMemory +RtlZombifyActivationContext +RtlpApplyLengthFunction +RtlpEnsureBufferSize +RtlpNotOwnerCriticalSection +RtlpNtCreateKey +RtlpNtEnumerateSubKey +RtlpNtMakeTemporaryKey +RtlpNtOpenKey +RtlpNtQueryValueKey +RtlpNtSetValueKey +RtlpUnWaitCriticalSection +RtlpWaitForCriticalSection +RtlxAnsiStringToUnicodeSize +RtlxOemStringToUnicodeSize +RtlxUnicodeStringToAnsiSize +RtlxUnicodeStringToOemSize +VerSetConditionMask +ZwAcceptConnectPort +ZwAccessCheck +ZwAccessCheckAndAuditAlarm +ZwAccessCheckByType +ZwAccessCheckByTypeAndAuditAlarm +ZwAccessCheckByTypeResultList +ZwAccessCheckByTypeResultListAndAuditAlarm +ZwAccessCheckByTypeResultListAndAuditAlarmByHandle +ZwAddAtom +ZwAddBootEntry +ZwAdjustGroupsToken +ZwAdjustPrivilegesToken +ZwAlertResumeThread +ZwAlertThread +ZwAllocateLocallyUniqueId +ZwAllocateUserPhysicalPages +ZwAllocateUuids +ZwAllocateVirtualMemory +ZwAreMappedFilesTheSame +ZwAssignProcessToJobObject +ZwCallbackReturn +ZwCancelIoFile +ZwCancelTimer +ZwClearEvent +ZwClose +ZwCloseObjectAuditAlarm +ZwCompactKeys +ZwCompareTokens +ZwCompleteConnectPort +ZwCompressKey +ZwConnectPort +ZwContinue +ZwCreateDebugObject +ZwCreateDirectoryObject +ZwCreateEvent +ZwCreateEventPair +ZwCreateFile +ZwCreateIoCompletion +ZwCreateJobObject +ZwCreateJobSet +ZwCreateKey +ZwCreateKeyedEvent +ZwCreateMailslotFile +ZwCreateMutant +ZwCreateNamedPipeFile +ZwCreatePagingFile +ZwCreatePort +ZwCreateProcess +ZwCreateProcessEx +ZwCreateProfile +ZwCreateSection +ZwCreateSemaphore +ZwCreateSymbolicLinkObject +ZwCreateThread +ZwCreateTimer +ZwCreateToken +ZwCreateWaitablePort +ZwDebugActiveProcess +ZwDebugContinue +ZwDelayExecution +ZwDeleteAtom +ZwDeleteBootEntry +ZwDeleteFile +ZwDeleteKey +ZwDeleteObjectAuditAlarm +ZwDeleteValueKey +ZwDeviceIoControlFile +ZwDisplayString +ZwDuplicateObject +ZwDuplicateToken +ZwEnumerateBootEntries +ZwEnumerateKey +ZwEnumerateSystemEnvironmentValuesEx +ZwEnumerateValueKey +ZwExtendSection +ZwFilterToken +ZwFindAtom +ZwFlushBuffersFile +ZwFlushInstructionCache +ZwFlushKey +ZwFlushVirtualMemory +ZwFlushWriteBuffer +ZwFreeUserPhysicalPages +ZwFreeVirtualMemory +ZwFsControlFile +ZwGetContextThread +ZwGetDevicePowerState +ZwGetWriteWatch +ZwImpersonateAnonymousToken +ZwImpersonateClientOfPort +ZwImpersonateThread +ZwInitializeRegistry +ZwInitiatePowerAction +ZwIsProcessInJob +ZwIsSystemResumeAutomatic +ZwListenPort +ZwLoadDriver +ZwLoadKey +ZwLoadKey2 +ZwLockFile +ZwLockProductActivationKeys +ZwLockRegistryKey +ZwLockVirtualMemory +ZwMakePermanentObject +ZwMakeTemporaryObject +ZwMapUserPhysicalPages +ZwMapUserPhysicalPagesScatter +ZwMapViewOfSection +ZwModifyBootEntry +ZwNotifyChangeDirectoryFile +ZwNotifyChangeKey +ZwNotifyChangeMultipleKeys +ZwOpenDirectoryObject +ZwOpenEvent +ZwOpenEventPair +ZwOpenFile +ZwOpenIoCompletion +ZwOpenJobObject +ZwOpenKey +ZwOpenKeyedEvent +ZwOpenMutant +ZwOpenObjectAuditAlarm +ZwOpenProcess +ZwOpenProcessToken +ZwOpenProcessTokenEx +ZwOpenSection +ZwOpenSemaphore +ZwOpenSymbolicLinkObject +ZwOpenThread +ZwOpenThreadToken +ZwOpenThreadTokenEx +ZwOpenTimer +ZwPlugPlayControl +ZwPowerInformation +ZwPrivilegeCheck +ZwPrivilegeObjectAuditAlarm +ZwPrivilegedServiceAuditAlarm +ZwProtectVirtualMemory +ZwPulseEvent +ZwQueryAttributesFile +ZwQueryBootEntryOrder +ZwQueryBootOptions +ZwQueryDebugFilterState +ZwQueryDefaultLocale +ZwQueryDefaultUILanguage +ZwQueryDirectoryFile +ZwQueryDirectoryObject +ZwQueryEaFile +ZwQueryEvent +ZwQueryFullAttributesFile +ZwQueryInformationAtom +ZwQueryInformationFile +ZwQueryInformationJobObject +ZwQueryInformationPort +ZwQueryInformationProcess +ZwQueryInformationThread +ZwQueryInformationToken +ZwQueryInstallUILanguage +ZwQueryIntervalProfile +ZwQueryIoCompletion +ZwQueryKey +ZwQueryMultipleValueKey +ZwQueryMutant +ZwQueryObject +ZwQueryOpenSubKeys +ZwQueryPerformanceCounter +ZwQueryPortInformationProcess +ZwQueryQuotaInformationFile +ZwQuerySection +ZwQuerySecurityObject +ZwQuerySemaphore +ZwQuerySymbolicLinkObject +ZwQuerySystemEnvironmentValue +ZwQuerySystemEnvironmentValueEx +ZwQuerySystemInformation +ZwQuerySystemTime +ZwQueryTimer +ZwQueryTimerResolution +ZwQueryValueKey +ZwQueryVirtualMemory +ZwQueryVolumeInformationFile +ZwQueueApcThread +ZwRaiseException +ZwRaiseHardError +ZwReadFile +ZwReadFileScatter +ZwReadRequestData +ZwReadVirtualMemory +ZwRegisterThreadTerminatePort +ZwReleaseKeyedEvent +ZwReleaseMutant +ZwReleaseSemaphore +ZwRemoveIoCompletion +ZwRemoveProcessDebug +ZwRenameKey +ZwReplaceKey +ZwReplyPort +ZwReplyWaitReceivePort +ZwReplyWaitReceivePortEx +ZwReplyWaitReplyPort +ZwRequestPort +ZwRequestWaitReplyPort +ZwResetEvent +ZwResetWriteWatch +ZwRestoreKey +ZwResumeProcess +ZwResumeThread +ZwSaveKey +ZwSaveKeyEx +ZwSaveMergedKeys +ZwSecureConnectPort +ZwSetBootEntryOrder +ZwSetBootOptions +ZwSetContextThread +ZwSetDebugFilterState +ZwSetDefaultHardErrorPort +ZwSetDefaultLocale +ZwSetDefaultUILanguage +ZwSetEaFile +ZwSetEvent +ZwSetEventBoostPriority +ZwSetHighEventPair +ZwSetHighWaitLowEventPair +ZwSetInformationDebugObject +ZwSetInformationFile +ZwSetInformationJobObject +ZwSetInformationKey +ZwSetInformationObject +ZwSetInformationProcess +ZwSetInformationThread +ZwSetInformationToken +ZwSetIntervalProfile +ZwSetIoCompletion +ZwSetLdtEntries +ZwSetLowEventPair +ZwSetLowWaitHighEventPair +ZwSetQuotaInformationFile +ZwSetSecurityObject +ZwSetSystemEnvironmentValue +ZwSetSystemEnvironmentValueEx +ZwSetSystemInformation +ZwSetSystemPowerState +ZwSetSystemTime +ZwSetThreadExecutionState +ZwSetTimer +ZwSetTimerResolution +ZwSetUuidSeed +ZwSetValueKey +ZwSetVolumeInformationFile +ZwShutdownSystem +ZwSignalAndWaitForSingleObject +ZwStartProfile +ZwStopProfile +ZwSuspendProcess +ZwSuspendThread +ZwSystemDebugControl +ZwTerminateJobObject +ZwTerminateProcess +ZwTerminateThread +ZwTestAlert +ZwTraceEvent +ZwTranslateFilePath +ZwUnloadDriver +ZwUnloadKey +ZwUnloadKeyEx +ZwUnlockFile +ZwUnlockVirtualMemory +ZwUnmapViewOfSection +ZwVdmControl +ZwWaitForDebugEvent +ZwWaitForKeyedEvent +ZwWaitForMultipleObjects +ZwWaitForSingleObject +ZwWaitHighEventPair +ZwWaitLowEventPair +ZwWriteFile +ZwWriteFileGather +ZwWriteRequestData +ZwWriteVirtualMemory +ZwYieldExecution +__isascii +__iscsym +__iscsymf +__toascii +_alldiv +_alldvrm +_allmul +_allrem +_allshl +_allshr +_atoi64 +_aulldiv +_aulldvrm +_aullrem +_aullshr +_fltused +_i64toa +_i64tow +_itoa +_itow +_lfind +_ltoa +_ltow +_memccpy +_memicmp +_snprintf +_snwprintf +_splitpath +_strcmpi +_stricmp +_strlwr +_strnicmp +_strupr +_ui64toa +_ui64tow +_ultoa +_ultow +_vsnprintf +_vsnwprintf +_wcsicmp +_wcslwr +_wcsnicmp +_wcsupr +_wtoi +_wtoi64 +_wtol +abs +atan +atoi +atol +bsearch +ceil +cos +fabs +floor +isalnum +isalpha +iscntrl +isdigit +isgraph +islower +isprint +ispunct +isspace +isupper +iswalpha +iswctype +iswdigit +iswlower +iswspace +iswxdigit +isxdigit +labs +log +mbstowcs +memchr +memcmp +memcpy +memmove +memset +pow +qsort +sin +sprintf +sqrt +sscanf +strcat +strchr +strcmp +strcpy +strcspn +strlen +strncat +strncmp +strncpy +strpbrk +strrchr +strspn +strstr +strtol +strtoul +swprintf +tan +tolower +toupper +towlower +towupper +vDbgPrintEx +vDbgPrintExWithPrefix +vsprintf +wcscat +wcschr +wcscmp +wcscpy +wcscspn +wcslen +wcsncat +wcsncmp +wcsncpy +wcspbrk +wcsrchr +wcsspn +wcsstr +wcstol +wcstombs +wcstoul diff --git a/libs/libmdbx/src/src/options.h b/libs/libmdbx/src/src/options.h new file mode 100644 index 0000000000..715f883bfc --- /dev/null +++ b/libs/libmdbx/src/src/options.h @@ -0,0 +1,213 @@ +/******************************************************************************* + ******************************************************************************* + ******************************************************************************* + * + * + * #### ##### ##### # #### # # #### + * # # # # # # # # ## # # + * # # # # # # # # # # # #### + * # # ##### # # # # # # # # + * # # # # # # # # ## # # + * #### # # # #### # # #### + * + * + */ + +/* using fcntl(F_FULLFSYNC) with 5-10 times slowdown */ +#define MDBX_OSX_WANNA_DURABILITY 0 +/* using fsync() with chance of data lost on power failure */ +#define MDBX_OSX_WANNA_SPEED 1 + +#ifndef MDBX_OSX_SPEED_INSTEADOF_DURABILITY +#define MDBX_OSX_SPEED_INSTEADOF_DURABILITY MDBX_OSX_WANNA_DURABILITY +#endif /* MDBX_OSX_SPEED_INSTEADOF_DURABILITY */ + +/* Controls checking PID against reuse DB environment after the fork() */ +#ifndef MDBX_TXN_CHECKPID +#if defined(MADV_DONTFORK) || defined(_WIN32) || defined(_WIN64) +/* PID check could be ommited: + * - on Linux when madvise(MADV_DONTFORK) is available. i.e. after the fork() + * mapped pages will not be available for child process. + * - in Windows where fork() not available. */ +#define MDBX_TXN_CHECKPID 0 +#else +#define MDBX_TXN_CHECKPID 1 +#endif +#define MDBX_TXN_CHECKPID_CONFIG "AUTO=" STRINGIFY(MDBX_TXN_CHECKPID) +#else +#define MDBX_TXN_CHECKPID_CONFIG STRINGIFY(MDBX_TXN_CHECKPID) +#endif /* MDBX_TXN_CHECKPID */ + +/* Controls checking transaction owner thread against misuse transactions from + * other threads. */ +#ifndef MDBX_TXN_CHECKOWNER +#define MDBX_TXN_CHECKOWNER 1 +#define MDBX_TXN_CHECKOWNER_CONFIG "AUTO=" STRINGIFY(MDBX_TXN_CHECKOWNER) +#else +#define MDBX_TXN_CHECKOWNER_CONFIG STRINGIFY(MDBX_TXN_CHECKOWNER) +#endif /* MDBX_TXN_CHECKOWNER */ + +/* Does a system have battery-backed Real-Time Clock or just a fake. */ +#ifndef MDBX_TRUST_RTC +#if defined(__linux__) || defined(__gnu_linux__) || defined(__NetBSD__) || \ + defined(__OpenBSD__) +#define MDBX_TRUST_RTC 0 /* a lot of embedded systems have a fake RTC */ +#else +#define MDBX_TRUST_RTC 1 +#endif +#define MDBX_TRUST_RTC_CONFIG "AUTO=" STRINGIFY(MDBX_TRUST_RTC) +#else +#define MDBX_TRUST_RTC_CONFIG STRINGIFY(MDBX_TRUST_RTC) +#endif /* MDBX_TRUST_RTC */ + +//------------------------------------------------------------------------------ + +#define MDBX_LOCKING_WIN32FILES -1 /* Win32 File Locking API */ +#define MDBX_LOCKING_SYSV 5 /* SystemV IPC semaphores */ +#define MDBX_LOCKING_POSIX1988 1988 /* POSIX-1 Shared anonymous semaphores */ +#define MDBX_LOCKING_POSIX2001 2001 /* POSIX-2001 Shared Mutexes */ +#define MDBX_LOCKING_POSIX2008 2008 /* POSIX-2008 Robust Mutexes */ +#define MDBX_LOCKING_BENAPHORE 1995 /* BeOS Benaphores, aka Futexes */ + +#if defined(_WIN32) || defined(_WIN64) +#define MDBX_LOCKING MDBX_LOCKING_WIN32FILES +#else +#ifndef MDBX_LOCKING +#if defined(_POSIX_THREAD_PROCESS_SHARED) && \ + _POSIX_THREAD_PROCESS_SHARED >= 200112L && !defined(__FreeBSD__) + +/* Some platforms define the EOWNERDEAD error code even though they + * don't support Robust Mutexes. If doubt compile with -MDBX_LOCKING=2001. */ +#if defined(EOWNERDEAD) && _POSIX_THREAD_PROCESS_SHARED >= 200809L && \ + ((defined(_POSIX_THREAD_ROBUST_PRIO_INHERIT) && \ + _POSIX_THREAD_ROBUST_PRIO_INHERIT > 0) || \ + (defined(_POSIX_THREAD_ROBUST_PRIO_PROTECT) && \ + _POSIX_THREAD_ROBUST_PRIO_PROTECT > 0) || \ + defined(PTHREAD_MUTEX_ROBUST) || defined(PTHREAD_MUTEX_ROBUST_NP)) && \ + (!defined(__GLIBC__) || \ + __GLIBC_PREREQ(2, 10) /* troubles with Robust mutexes before 2.10 */) +#define MDBX_LOCKING MDBX_LOCKING_POSIX2008 +#else +#define MDBX_LOCKING MDBX_LOCKING_POSIX2001 +#endif +#elif defined(__sun) || defined(__SVR4) || defined(__svr4__) +#define MDBX_LOCKING MDBX_LOCKING_POSIX1988 +#else +#define MDBX_LOCKING MDBX_LOCKING_SYSV +#endif +#define MDBX_LOCKING_CONFIG "AUTO=" STRINGIFY(MDBX_LOCKING) +#else +#define MDBX_LOCKING_CONFIG STRINGIFY(MDBX_LOCKING) +#endif /* MDBX_LOCKING */ +#endif /* !Windows */ + +#ifndef MDBX_USE_OFDLOCKS +#if defined(F_OFD_SETLK) && defined(F_OFD_SETLKW) && defined(F_OFD_GETLK) && \ + !defined(MDBX_SAFE4QEMU) && \ + !defined(__sun) /* OFD-lock are broken on Solaris */ +#define MDBX_USE_OFDLOCKS 1 +#else +#define MDBX_USE_OFDLOCKS 0 +#endif +#define MDBX_USE_OFDLOCKS_CONFIG "AUTO=" STRINGIFY(MDBX_USE_OFDLOCKS) +#else +#define MDBX_USE_OFDLOCKS_CONFIG STRINGIFY(MDBX_USE_OFDLOCKS) +#endif /* MDBX_USE_OFDLOCKS */ + +//------------------------------------------------------------------------------ + +#ifndef MDBX_CPU_WRITEBACK_INCOHERENT +#if defined(__ia32__) || defined(__e2k__) || defined(__hppa) || \ + defined(__hppa__) +#define MDBX_CPU_WRITEBACK_INCOHERENT 0 +#else +#define MDBX_CPU_WRITEBACK_INCOHERENT 1 +#endif +#endif /* MDBX_CPU_WRITEBACK_INCOHERENT */ + +#ifndef MDBX_MMAP_INCOHERENT_FILE_WRITE +#ifdef __OpenBSD__ +#define MDBX_MMAP_INCOHERENT_FILE_WRITE 1 +#else +#define MDBX_MMAP_INCOHERENT_FILE_WRITE 0 +#endif +#endif /* MDBX_MMAP_INCOHERENT_FILE_WRITE */ + +#ifndef MDBX_MMAP_INCOHERENT_CPU_CACHE +#if defined(__mips) || defined(__mips__) || defined(__mips64) || \ + defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ + defined(__MWERKS__) || defined(__sgi) +/* MIPS has cache coherency issues. */ +#define MDBX_MMAP_INCOHERENT_CPU_CACHE 1 +#else +/* LY: assume no relevant mmap/dcache issues. */ +#define MDBX_MMAP_INCOHERENT_CPU_CACHE 0 +#endif +#endif /* MDBX_MMAP_INCOHERENT_CPU_CACHE */ + +#ifndef MDBX_64BIT_ATOMIC +#if MDBX_WORDBITS >= 64 +#define MDBX_64BIT_ATOMIC 1 +#else +#define MDBX_64BIT_ATOMIC 0 +#endif +#define MDBX_64BIT_ATOMIC_CONFIG "AUTO=" STRINGIFY(MDBX_64BIT_ATOMIC) +#else +#define MDBX_64BIT_ATOMIC_CONFIG STRINGIFY(MDBX_64BIT_ATOMIC) +#endif /* MDBX_64BIT_ATOMIC */ + +#ifndef MDBX_64BIT_CAS +#if defined(ATOMIC_LLONG_LOCK_FREE) +#if ATOMIC_LLONG_LOCK_FREE > 1 +#define MDBX_64BIT_CAS 1 +#else +#define MDBX_64BIT_CAS 0 +#endif +#elif defined(__GCC_ATOMIC_LLONG_LOCK_FREE) +#if __GCC_ATOMIC_LLONG_LOCK_FREE > 1 +#define MDBX_64BIT_CAS 1 +#else +#define MDBX_64BIT_CAS 0 +#endif +#elif defined(__CLANG_ATOMIC_LLONG_LOCK_FREE) +#if __CLANG_ATOMIC_LLONG_LOCK_FREE > 1 +#define MDBX_64BIT_CAS 1 +#else +#define MDBX_64BIT_CAS 0 +#endif +#elif defined(_MSC_VER) || defined(__APPLE__) +#define MDBX_64BIT_CAS 1 +#else +#define MDBX_64BIT_CAS MDBX_64BIT_ATOMIC +#endif +#define MDBX_64BIT_CAS_CONFIG "AUTO=" STRINGIFY(MDBX_64BIT_CAS) +#else +#define MDBX_64BIT_CAS_CONFIG STRINGIFY(MDBX_64BIT_CAS) +#endif /* MDBX_64BIT_CAS */ + +#if !defined(MDBX_UNALIGNED_OK) +#if defined(_MSC_VER) +#define MDBX_UNALIGNED_OK 1 /* avoid MSVC misoptimization */ +#elif __CLANG_PREREQ(5, 0) || __GNUC_PREREQ(5, 0) +#define MDBX_UNALIGNED_OK 0 /* expecting optimization is well done */ +#elif (defined(__ia32__) || defined(__ARM_FEATURE_UNALIGNED)) && \ + !defined(__ALIGNED__) +#define MDBX_UNALIGNED_OK 1 +#else +#define MDBX_UNALIGNED_OK 0 +#endif +#endif /* MDBX_UNALIGNED_OK */ + +#ifndef MDBX_CACHELINE_SIZE +#if defined(SYSTEM_CACHE_ALIGNMENT_SIZE) +#define MDBX_CACHELINE_SIZE SYSTEM_CACHE_ALIGNMENT_SIZE +#elif defined(__ia64__) || defined(__ia64) || defined(_M_IA64) +#define MDBX_CACHELINE_SIZE 128 +#else +#define MDBX_CACHELINE_SIZE 64 +#endif +#endif /* MDBX_CACHELINE_SIZE */ + +/******************************************************************************* + ******************************************************************************* + ******************************************************************************/ diff --git a/libs/libmdbx/src/src/osal.c b/libs/libmdbx/src/src/osal.c new file mode 100644 index 0000000000..94902527b1 --- /dev/null +++ b/libs/libmdbx/src/src/osal.c @@ -0,0 +1,2206 @@ +/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + */ + +#include "internals.h" + +#if defined(_WIN32) || defined(_WIN64) + +#include + +static int waitstatus2errcode(DWORD result) { + switch (result) { + case WAIT_OBJECT_0: + return MDBX_SUCCESS; + case WAIT_FAILED: + return GetLastError(); + case WAIT_ABANDONED: + return ERROR_ABANDONED_WAIT_0; + case WAIT_IO_COMPLETION: + return ERROR_USER_APC; + case WAIT_TIMEOUT: + return ERROR_TIMEOUT; + default: + return ERROR_UNHANDLED_ERROR; + } +} + +/* Map a result from an NTAPI call to WIN32 error code. */ +static int ntstatus2errcode(NTSTATUS status) { + DWORD dummy; + OVERLAPPED ov; + memset(&ov, 0, sizeof(ov)); + ov.Internal = status; + return GetOverlappedResult(NULL, &ov, &dummy, FALSE) ? MDBX_SUCCESS + : GetLastError(); +} + +/* We use native NT APIs to setup the memory map, so that we can + * let the DB file grow incrementally instead of always preallocating + * the full size. These APIs are defined in and + * but those headers are meant for driver-level development and + * conflict with the regular user-level headers, so we explicitly + * declare them here. Using these APIs also means we must link to + * ntdll.dll, which is not linked by default in user code. */ + +extern NTSTATUS NTAPI NtCreateSection( + OUT PHANDLE SectionHandle, IN ACCESS_MASK DesiredAccess, + IN OPTIONAL POBJECT_ATTRIBUTES ObjectAttributes, + IN OPTIONAL PLARGE_INTEGER MaximumSize, IN ULONG SectionPageProtection, + IN ULONG AllocationAttributes, IN OPTIONAL HANDLE FileHandle); + +typedef struct _SECTION_BASIC_INFORMATION { + ULONG Unknown; + ULONG SectionAttributes; + LARGE_INTEGER SectionSize; +} SECTION_BASIC_INFORMATION, *PSECTION_BASIC_INFORMATION; + +extern NTSTATUS NTAPI NtMapViewOfSection( + IN HANDLE SectionHandle, IN HANDLE ProcessHandle, IN OUT PVOID *BaseAddress, + IN ULONG_PTR ZeroBits, IN SIZE_T CommitSize, + IN OUT OPTIONAL PLARGE_INTEGER SectionOffset, IN OUT PSIZE_T ViewSize, + IN SECTION_INHERIT InheritDisposition, IN ULONG AllocationType, + IN ULONG Win32Protect); + +extern NTSTATUS NTAPI NtUnmapViewOfSection(IN HANDLE ProcessHandle, + IN OPTIONAL PVOID BaseAddress); + +extern NTSTATUS NTAPI NtClose(HANDLE Handle); + +extern NTSTATUS NTAPI NtAllocateVirtualMemory( + IN HANDLE ProcessHandle, IN OUT PVOID *BaseAddress, IN ULONG_PTR ZeroBits, + IN OUT PSIZE_T RegionSize, IN ULONG AllocationType, IN ULONG Protect); + +extern NTSTATUS NTAPI NtFreeVirtualMemory(IN HANDLE ProcessHandle, + IN PVOID *BaseAddress, + IN OUT PSIZE_T RegionSize, + IN ULONG FreeType); + +#ifndef WOF_CURRENT_VERSION +typedef struct _WOF_EXTERNAL_INFO { + DWORD Version; + DWORD Provider; +} WOF_EXTERNAL_INFO, *PWOF_EXTERNAL_INFO; +#endif /* WOF_CURRENT_VERSION */ + +#ifndef WIM_PROVIDER_CURRENT_VERSION +#define WIM_PROVIDER_HASH_SIZE 20 + +typedef struct _WIM_PROVIDER_EXTERNAL_INFO { + DWORD Version; + DWORD Flags; + LARGE_INTEGER DataSourceId; + BYTE ResourceHash[WIM_PROVIDER_HASH_SIZE]; +} WIM_PROVIDER_EXTERNAL_INFO, *PWIM_PROVIDER_EXTERNAL_INFO; +#endif /* WIM_PROVIDER_CURRENT_VERSION */ + +#ifndef FILE_PROVIDER_CURRENT_VERSION +typedef struct _FILE_PROVIDER_EXTERNAL_INFO_V1 { + ULONG Version; + ULONG Algorithm; + ULONG Flags; +} FILE_PROVIDER_EXTERNAL_INFO_V1, *PFILE_PROVIDER_EXTERNAL_INFO_V1; +#endif /* FILE_PROVIDER_CURRENT_VERSION */ + +#ifndef STATUS_OBJECT_NOT_EXTERNALLY_BACKED +#define STATUS_OBJECT_NOT_EXTERNALLY_BACKED ((NTSTATUS)0xC000046DL) +#endif +#ifndef STATUS_INVALID_DEVICE_REQUEST +#define STATUS_INVALID_DEVICE_REQUEST ((NTSTATUS)0xC0000010L) +#endif + +#ifndef FILE_DEVICE_FILE_SYSTEM +#define FILE_DEVICE_FILE_SYSTEM 0x00000009 +#endif + +#ifndef FSCTL_GET_EXTERNAL_BACKING +#define FSCTL_GET_EXTERNAL_BACKING \ + CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 196, METHOD_BUFFERED, FILE_ANY_ACCESS) +#endif + +#endif /* _WIN32 || _WIN64 */ + +/*----------------------------------------------------------------------------*/ + +#if _POSIX_C_SOURCE > 200212 && \ + /* workaround for avoid musl libc wrong prototype */ ( \ + defined(__GLIBC__) || defined(__GNU_LIBRARY__)) +/* Prototype should match libc runtime. ISO POSIX (2003) & LSB 1.x-3.x */ +__extern_C void __assert_fail(const char *assertion, const char *file, + unsigned line, const char *function) +#ifdef __THROW + __THROW +#else + __nothrow +#endif /* __THROW */ + __noreturn; + +#elif defined(__APPLE__) || defined(__MACH__) +__extern_C void __assert_rtn(const char *function, const char *file, int line, + const char *assertion) /* __nothrow */ +#ifdef __dead2 + __dead2 +#else + __noreturn +#endif /* __dead2 */ +#ifdef __disable_tail_calls + __disable_tail_calls +#endif /* __disable_tail_calls */ + ; + +#define __assert_fail(assertion, file, line, function) \ + __assert_rtn(function, file, line, assertion) +#elif defined(__sun) || defined(__SVR4) || defined(__svr4__) +__extern_C void __assert_c99(const char *assection, const char *file, int line, + const char *function) __noreturn; +#define __assert_fail(assertion, file, line, function) \ + __assert_c99(assertion, file, line, function) +#elif defined(__OpenBSD__) +__extern_C __dead void __assert2(const char *file, int line, + const char *function, + const char *assertion) /* __nothrow */; +#define __assert_fail(assertion, file, line, function) \ + __assert2(file, line, function, assertion) +#elif defined(__NetBSD__) +__extern_C __dead void __assert13(const char *file, int line, + const char *function, + const char *assertion) /* __nothrow */; +#define __assert_fail(assertion, file, line, function) \ + __assert13(file, line, function, assertion) +#elif defined(__FreeBSD__) || defined(__BSD__) || defined(__bsdi__) || \ + defined(__DragonFly__) +__extern_C void __assert(const char *function, const char *file, int line, + const char *assertion) /* __nothrow */ +#ifdef __dead2 + __dead2 +#else + __noreturn +#endif /* __dead2 */ +#ifdef __disable_tail_calls + __disable_tail_calls +#endif /* __disable_tail_calls */ + ; +#define __assert_fail(assertion, file, line, function) \ + __assert(function, file, line, assertion) + +#endif /* __assert_fail */ + +#if !defined(__ANDROID_API__) || MDBX_DEBUG + +MDBX_INTERNAL_FUNC void __cold mdbx_assert_fail(const MDBX_env *env, + const char *msg, + const char *func, int line) { +#if MDBX_DEBUG + if (env && env->me_assert_func) { + env->me_assert_func(env, msg, func, line); + return; + } +#else + (void)env; +#endif /* MDBX_DEBUG */ + + if (mdbx_debug_logger) + mdbx_debug_log(MDBX_LOG_FATAL, func, line, "assert: %s\n", msg); + else { +#if defined(_WIN32) || defined(_WIN64) + char *message = nullptr; + const int num = mdbx_asprintf(&message, "\r\nMDBX-ASSERTION: %s, %s:%u", + msg, func ? func : "unknown", line); + if (num < 1 || !message) + message = ""; + OutputDebugStringA(message); + if (IsDebuggerPresent()) + DebugBreak(); +#elif defined(__ANDROID_API__) + __android_log_assert(msg, "mdbx", "%s:%u", func, line); +#else + __assert_fail(msg, "mdbx", line, func); +#endif + } + +#if defined(_WIN32) || defined(_WIN64) + FatalExit(ERROR_UNHANDLED_ERROR); +#else + abort(); +#endif +} + +#endif /* __ANDROID_API__ || MDBX_DEBUG */ + +#if !defined(__ANDROID_API__) + +MDBX_INTERNAL_FUNC __cold void mdbx_panic(const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + + char *message = nullptr; + const int num = mdbx_vasprintf(&message, fmt, ap); + va_end(ap); + const char *const const_message = + (num < 1 || !message) ? "" + : message; + +#if defined(_WIN32) || defined(_WIN64) + OutputDebugStringA("\r\nMDBX-PANIC: "); + OutputDebugStringA(const_message); + if (IsDebuggerPresent()) + DebugBreak(); + FatalExit(ERROR_UNHANDLED_ERROR); +#else + __assert_fail(const_message, "mdbx", 0, "panic"); + abort(); +#endif +} + +#endif /* ! __ANDROID_API__ */ + +/*----------------------------------------------------------------------------*/ + +#ifndef mdbx_vasprintf +MDBX_INTERNAL_FUNC int mdbx_vasprintf(char **strp, const char *fmt, + va_list ap) { + va_list ones; + va_copy(ones, ap); + int needed = vsnprintf(nullptr, 0, fmt, ap); + + if (unlikely(needed < 0 || needed >= INT_MAX)) { + *strp = nullptr; + va_end(ones); + return needed; + } + + *strp = mdbx_malloc(needed + 1); + if (unlikely(*strp == nullptr)) { + va_end(ones); +#if defined(_WIN32) || defined(_WIN64) + SetLastError(MDBX_ENOMEM); +#else + errno = MDBX_ENOMEM; +#endif + return -1; + } + + int actual = vsnprintf(*strp, needed + 1, fmt, ones); + va_end(ones); + + assert(actual == needed); + if (unlikely(actual < 0)) { + mdbx_free(*strp); + *strp = nullptr; + } + return actual; +} +#endif /* mdbx_vasprintf */ + +#ifndef mdbx_asprintf +MDBX_INTERNAL_FUNC int mdbx_asprintf(char **strp, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + int rc = mdbx_vasprintf(strp, fmt, ap); + va_end(ap); + return rc; +} +#endif /* mdbx_asprintf */ + +#ifndef mdbx_memalign_alloc +MDBX_INTERNAL_FUNC int mdbx_memalign_alloc(size_t alignment, size_t bytes, + void **result) { + assert(is_powerof2(alignment) && alignment >= sizeof(void *)); +#if defined(_WIN32) || defined(_WIN64) + (void)alignment; + *result = VirtualAlloc(NULL, bytes, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); + return *result ? MDBX_SUCCESS : MDBX_ENOMEM /* ERROR_OUTOFMEMORY */; +#elif defined(_ISOC11_SOURCE) + *result = aligned_alloc(alignment, ceil_powerof2(bytes, alignment)); + return *result ? MDBX_SUCCESS : errno; +#elif _POSIX_VERSION >= 200112L && \ + (!defined(__ANDROID_API__) || __ANDROID_API__ >= 17) + *result = nullptr; + return posix_memalign(result, alignment, bytes); +#elif __GLIBC_PREREQ(2, 16) || __STDC_VERSION__ >= 201112L + *result = memalign(alignment, bytes); + return *result ? MDBX_SUCCESS : errno; +#else +#error FIXME +#endif +} +#endif /* mdbx_memalign_alloc */ + +#ifndef mdbx_memalign_free +MDBX_INTERNAL_FUNC void mdbx_memalign_free(void *ptr) { +#if defined(_WIN32) || defined(_WIN64) + VirtualFree(ptr, 0, MEM_RELEASE); +#else + mdbx_free(ptr); +#endif +} +#endif /* mdbx_memalign_free */ + +#ifndef mdbx_strdup +char *mdbx_strdup(const char *str) { + if (!str) + return NULL; + size_t bytes = strlen(str) + 1; + char *dup = mdbx_malloc(bytes); + if (dup) + memcpy(dup, str, bytes); + return dup; +} +#endif /* mdbx_strdup */ + +/*----------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC int mdbx_condmutex_init(mdbx_condmutex_t *condmutex) { +#if defined(_WIN32) || defined(_WIN64) + int rc = MDBX_SUCCESS; + condmutex->event = NULL; + condmutex->mutex = CreateMutexW(NULL, FALSE, NULL); + if (!condmutex->mutex) + return GetLastError(); + + condmutex->event = CreateEventW(NULL, TRUE, FALSE, NULL); + if (!condmutex->event) { + rc = GetLastError(); + (void)CloseHandle(condmutex->mutex); + condmutex->mutex = NULL; + } + return rc; +#else + memset(condmutex, 0, sizeof(mdbx_condmutex_t)); + int rc = pthread_mutex_init(&condmutex->mutex, NULL); + if (rc == 0) { + rc = pthread_cond_init(&condmutex->cond, NULL); + if (rc != 0) + (void)pthread_mutex_destroy(&condmutex->mutex); + } + return rc; +#endif +} + +static bool is_allzeros(const void *ptr, size_t bytes) { + const uint8_t *u8 = ptr; + for (size_t i = 0; i < bytes; ++i) + if (u8[i] != 0) + return false; + return true; +} + +MDBX_INTERNAL_FUNC int mdbx_condmutex_destroy(mdbx_condmutex_t *condmutex) { + int rc = MDBX_EINVAL; +#if defined(_WIN32) || defined(_WIN64) + if (condmutex->event) { + rc = CloseHandle(condmutex->event) ? MDBX_SUCCESS : GetLastError(); + if (rc == MDBX_SUCCESS) + condmutex->event = NULL; + } + if (condmutex->mutex) { + rc = CloseHandle(condmutex->mutex) ? MDBX_SUCCESS : GetLastError(); + if (rc == MDBX_SUCCESS) + condmutex->mutex = NULL; + } +#else + if (!is_allzeros(&condmutex->cond, sizeof(condmutex->cond))) { + rc = pthread_cond_destroy(&condmutex->cond); + if (rc == 0) + memset(&condmutex->cond, 0, sizeof(condmutex->cond)); + } + if (!is_allzeros(&condmutex->mutex, sizeof(condmutex->mutex))) { + rc = pthread_mutex_destroy(&condmutex->mutex); + if (rc == 0) + memset(&condmutex->mutex, 0, sizeof(condmutex->mutex)); + } +#endif + return rc; +} + +MDBX_INTERNAL_FUNC int mdbx_condmutex_lock(mdbx_condmutex_t *condmutex) { +#if defined(_WIN32) || defined(_WIN64) + DWORD code = WaitForSingleObject(condmutex->mutex, INFINITE); + return waitstatus2errcode(code); +#else + return pthread_mutex_lock(&condmutex->mutex); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_condmutex_unlock(mdbx_condmutex_t *condmutex) { +#if defined(_WIN32) || defined(_WIN64) + return ReleaseMutex(condmutex->mutex) ? MDBX_SUCCESS : GetLastError(); +#else + return pthread_mutex_unlock(&condmutex->mutex); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_condmutex_signal(mdbx_condmutex_t *condmutex) { +#if defined(_WIN32) || defined(_WIN64) + return SetEvent(condmutex->event) ? MDBX_SUCCESS : GetLastError(); +#else + return pthread_cond_signal(&condmutex->cond); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_condmutex_wait(mdbx_condmutex_t *condmutex) { +#if defined(_WIN32) || defined(_WIN64) + DWORD code = + SignalObjectAndWait(condmutex->mutex, condmutex->event, INFINITE, FALSE); + if (code == WAIT_OBJECT_0) { + code = WaitForSingleObject(condmutex->mutex, INFINITE); + if (code == WAIT_OBJECT_0) + return ResetEvent(condmutex->event) ? MDBX_SUCCESS : GetLastError(); + } + return waitstatus2errcode(code); +#else + return pthread_cond_wait(&condmutex->cond, &condmutex->mutex); +#endif +} + +/*----------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC int mdbx_fastmutex_init(mdbx_fastmutex_t *fastmutex) { +#if defined(_WIN32) || defined(_WIN64) + InitializeCriticalSection(fastmutex); + return MDBX_SUCCESS; +#else + return pthread_mutex_init(fastmutex, NULL); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex) { +#if defined(_WIN32) || defined(_WIN64) + DeleteCriticalSection(fastmutex); + return MDBX_SUCCESS; +#else + return pthread_mutex_destroy(fastmutex); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex) { +#if defined(_WIN32) || defined(_WIN64) + EnterCriticalSection(fastmutex); + return MDBX_SUCCESS; +#else + return pthread_mutex_lock(fastmutex); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_fastmutex_release(mdbx_fastmutex_t *fastmutex) { +#if defined(_WIN32) || defined(_WIN64) + LeaveCriticalSection(fastmutex); + return MDBX_SUCCESS; +#else + return pthread_mutex_unlock(fastmutex); +#endif +} + +/*----------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC int mdbx_removefile(const char *pathname) { +#if defined(_WIN32) || defined(_WIN64) + const size_t wlen = mbstowcs(nullptr, pathname, INT_MAX); + if (wlen < 1 || wlen > /* MAX_PATH */ INT16_MAX) + return ERROR_INVALID_NAME; + wchar_t *const pathnameW = _alloca((wlen + 1) * sizeof(wchar_t)); + if (wlen != mbstowcs(pathnameW, pathname, wlen + 1)) + return ERROR_INVALID_NAME; + return DeleteFileW(pathnameW) ? MDBX_SUCCESS : GetLastError(); +#else + return unlink(pathname) ? errno : MDBX_SUCCESS; +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose, + const MDBX_env *env, const char *pathname, + mdbx_filehandle_t *fd, + mode_t unix_mode_bits) { + *fd = INVALID_HANDLE_VALUE; + +#if defined(_WIN32) || defined(_WIN64) + const size_t wlen = mbstowcs(nullptr, pathname, INT_MAX); + if (wlen < 1 || wlen > /* MAX_PATH */ INT16_MAX) + return ERROR_INVALID_NAME; + wchar_t *const pathnameW = _alloca((wlen + 1) * sizeof(wchar_t)); + if (wlen != mbstowcs(pathnameW, pathname, wlen + 1)) + return ERROR_INVALID_NAME; + + DWORD CreationDisposition = unix_mode_bits ? OPEN_ALWAYS : OPEN_EXISTING; + DWORD FlagsAndAttributes = + FILE_FLAG_POSIX_SEMANTICS | FILE_ATTRIBUTE_NOT_CONTENT_INDEXED; + DWORD DesiredAccess = FILE_READ_ATTRIBUTES; + DWORD ShareMode = (env->me_flags & MDBX_EXCLUSIVE) + ? 0 + : (FILE_SHARE_READ | FILE_SHARE_WRITE); + + switch (purpose) { + default: + return ERROR_INVALID_PARAMETER; + case MDBX_OPEN_LCK: + CreationDisposition = OPEN_ALWAYS; + DesiredAccess |= GENERIC_READ | GENERIC_WRITE; + FlagsAndAttributes |= FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_TEMPORARY; + break; + case MDBX_OPEN_DXB_READ: + CreationDisposition = OPEN_EXISTING; + DesiredAccess |= GENERIC_READ; + ShareMode |= FILE_SHARE_READ; + break; + case MDBX_OPEN_DXB_LAZY: + DesiredAccess |= GENERIC_READ | GENERIC_WRITE; + break; + case MDBX_OPEN_DXB_DSYNC: + CreationDisposition = OPEN_EXISTING; + DesiredAccess |= GENERIC_WRITE; + FlagsAndAttributes |= FILE_FLAG_WRITE_THROUGH; + break; + case MDBX_OPEN_COPY: + CreationDisposition = CREATE_NEW; + ShareMode = 0; + DesiredAccess |= GENERIC_WRITE; + FlagsAndAttributes |= + (env->me_psize < env->me_os_psize) ? 0 : FILE_FLAG_NO_BUFFERING; + break; + } + + *fd = CreateFileW(pathnameW, DesiredAccess, ShareMode, NULL, + CreationDisposition, FlagsAndAttributes, NULL); + if (*fd == INVALID_HANDLE_VALUE) + return GetLastError(); + + BY_HANDLE_FILE_INFORMATION info; + if (!GetFileInformationByHandle(*fd, &info)) { + int err = GetLastError(); + CloseHandle(*fd); + *fd = INVALID_HANDLE_VALUE; + return err; + } + const DWORD AttributesDiff = + (info.dwFileAttributes ^ FlagsAndAttributes) & + (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_NOT_CONTENT_INDEXED | + FILE_ATTRIBUTE_TEMPORARY | FILE_ATTRIBUTE_COMPRESSED); + if (AttributesDiff) + (void)SetFileAttributesW(pathnameW, info.dwFileAttributes ^ AttributesDiff); + +#else + int flags = unix_mode_bits ? O_CREAT : 0; + switch (purpose) { + default: + return EINVAL; + case MDBX_OPEN_LCK: + flags |= O_RDWR; + break; + case MDBX_OPEN_DXB_READ: + flags = O_RDONLY; + break; + case MDBX_OPEN_DXB_LAZY: + flags |= O_RDWR; + break; + case MDBX_OPEN_COPY: + flags = O_CREAT | O_WRONLY | O_EXCL; + break; + case MDBX_OPEN_DXB_DSYNC: + flags |= O_WRONLY; +#if defined(O_DSYNC) + flags |= O_DSYNC; +#elif defined(O_SYNC) + flags |= O_SYNC; +#elif defined(O_FSYNC) + flags |= O_FSYNC; +#endif + break; + } + + const bool direct_nocache_for_copy = + env->me_psize >= env->me_os_psize && purpose == MDBX_OPEN_COPY; + if (direct_nocache_for_copy) { +#if defined(O_DIRECT) + flags |= O_DIRECT; +#endif /* O_DIRECT */ +#if defined(O_NOCACHE) + flags |= O_NOCACHE; +#endif /* O_NOCACHE */ + } + +#ifdef O_CLOEXEC + flags |= O_CLOEXEC; +#endif /* O_CLOEXEC */ + + *fd = open(pathname, flags, unix_mode_bits); +#if defined(O_DIRECT) + if (*fd < 0 && (flags & O_DIRECT) && + (errno == EINVAL || errno == EAFNOSUPPORT)) { + flags &= ~(O_DIRECT | O_EXCL); + *fd = open(pathname, flags, unix_mode_bits); + } +#endif /* O_DIRECT */ + if (*fd < 0) + return errno; + +#if defined(FD_CLOEXEC) && !defined(O_CLOEXEC) + const int fd_flags = fcntl(*fd, F_GETFD); + if (fd_flags != -1) + (void)fcntl(*fd, F_SETFD, fd_flags | FD_CLOEXEC); +#endif /* FD_CLOEXEC && !O_CLOEXEC */ + + if (direct_nocache_for_copy) { +#if defined(F_NOCACHE) && !defined(O_NOCACHE) + (void)fcntl(*fd, F_NOCACHE, 1); +#endif /* F_NOCACHE */ + } + +#endif + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_closefile(mdbx_filehandle_t fd) { +#if defined(_WIN32) || defined(_WIN64) + return CloseHandle(fd) ? MDBX_SUCCESS : GetLastError(); +#else + return (close(fd) == 0) ? MDBX_SUCCESS : errno; +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t bytes, + uint64_t offset) { + if (bytes > MAX_WRITE) + return MDBX_EINVAL; +#if defined(_WIN32) || defined(_WIN64) + OVERLAPPED ov; + ov.hEvent = 0; + ov.Offset = (DWORD)offset; + ov.OffsetHigh = HIGH_DWORD(offset); + + DWORD read = 0; + if (unlikely(!ReadFile(fd, buf, (DWORD)bytes, &read, &ov))) { + int rc = GetLastError(); + return (rc == MDBX_SUCCESS) ? /* paranoia */ ERROR_READ_FAULT : rc; + } +#else + STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + intptr_t read = pread(fd, buf, bytes, offset); + if (read < 0) { + int rc = errno; + return (rc == MDBX_SUCCESS) ? /* paranoia */ MDBX_EIO : rc; + } +#endif + return (bytes == (size_t)read) ? MDBX_SUCCESS : MDBX_ENODATA; +} + +MDBX_INTERNAL_FUNC int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, + size_t bytes, uint64_t offset) { + while (true) { +#if defined(_WIN32) || defined(_WIN64) + OVERLAPPED ov; + ov.hEvent = 0; + ov.Offset = (DWORD)offset; + ov.OffsetHigh = HIGH_DWORD(offset); + + DWORD written; + if (unlikely(!WriteFile( + fd, buf, likely(bytes <= MAX_WRITE) ? (DWORD)bytes : MAX_WRITE, + &written, &ov))) + return GetLastError(); + if (likely(bytes == written)) + return MDBX_SUCCESS; +#else + STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + const intptr_t written = + pwrite(fd, buf, likely(bytes <= MAX_WRITE) ? bytes : MAX_WRITE, offset); + if (likely(bytes == (size_t)written)) + return MDBX_SUCCESS; + if (written < 0) { + const int rc = errno; + if (rc != EINTR) + return rc; + continue; + } +#endif + bytes -= written; + offset += written; + buf = (char *)buf + written; + } +} + +MDBX_INTERNAL_FUNC int mdbx_write(mdbx_filehandle_t fd, const void *buf, + size_t bytes) { + while (true) { +#if defined(_WIN32) || defined(_WIN64) + DWORD written; + if (unlikely(!WriteFile( + fd, buf, likely(bytes <= MAX_WRITE) ? (DWORD)bytes : MAX_WRITE, + &written, nullptr))) + return GetLastError(); + if (likely(bytes == written)) + return MDBX_SUCCESS; +#else + STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + const intptr_t written = + write(fd, buf, likely(bytes <= MAX_WRITE) ? bytes : MAX_WRITE); + if (likely(bytes == (size_t)written)) + return MDBX_SUCCESS; + if (written < 0) { + const int rc = errno; + if (rc != EINTR) + return rc; + continue; + } +#endif + bytes -= written; + buf = (char *)buf + written; + } +} + +int mdbx_pwritev(mdbx_filehandle_t fd, struct iovec *iov, int iovcnt, + uint64_t offset, size_t expected_written) { +#if defined(_WIN32) || defined(_WIN64) || defined(__APPLE__) || \ + (defined(__ANDROID_API__) && __ANDROID_API__ < 24) + size_t written = 0; + for (int i = 0; i < iovcnt; ++i) { + int rc = mdbx_pwrite(fd, iov[i].iov_base, iov[i].iov_len, offset); + if (unlikely(rc != MDBX_SUCCESS)) + return rc; + written += iov[i].iov_len; + offset += iov[i].iov_len; + } + return (expected_written == written) ? MDBX_SUCCESS + : MDBX_EIO /* ERROR_WRITE_FAULT */; +#else + int rc; + intptr_t written; + do { + STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + written = pwritev(fd, iov, iovcnt, offset); + if (likely(expected_written == (size_t)written)) + return MDBX_SUCCESS; + rc = errno; + } while (rc == EINTR); + return (written < 0) ? rc : MDBX_EIO /* Use which error code? */; +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_filesync(mdbx_filehandle_t fd, + enum mdbx_syncmode_bits mode_bits) { +#if defined(_WIN32) || defined(_WIN64) + return ((mode_bits & (MDBX_SYNC_DATA | MDBX_SYNC_IODQ)) == 0 || + FlushFileBuffers(fd)) + ? MDBX_SUCCESS + : GetLastError(); +#else + +#if defined(__APPLE__) && \ + MDBX_OSX_SPEED_INSTEADOF_DURABILITY == MDBX_OSX_WANNA_DURABILITY + if (mode_bits & MDBX_SYNC_IODQ) + return likely(fcntl(fd, F_FULLFSYNC) != -1) ? MDBX_SUCCESS : errno; +#endif /* MacOS */ +#if defined(__linux__) || defined(__gnu_linux__) + if (mode_bits == MDBX_SYNC_SIZE && mdbx_linux_kernel_version >= 0x03060000) + return MDBX_SUCCESS; +#endif /* Linux */ + int rc; + do { +#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0 + /* LY: This code is always safe and without appreciable performance + * degradation, even on a kernel with fdatasync's bug. + * + * For more info about of a corresponding fdatasync() bug + * see http://www.spinics.net/lists/linux-ext4/msg33714.html */ + if ((mode_bits & MDBX_SYNC_SIZE) == 0) { + if (fdatasync(fd) == 0) + return MDBX_SUCCESS; + } else +#else + (void)mode_bits; +#endif + if (fsync(fd) == 0) + return MDBX_SUCCESS; + rc = errno; + } while (rc == EINTR); + return rc; +#endif +} + +int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length) { +#if defined(_WIN32) || defined(_WIN64) + BY_HANDLE_FILE_INFORMATION info; + if (!GetFileInformationByHandle(fd, &info)) + return GetLastError(); + *length = info.nFileSizeLow | (uint64_t)info.nFileSizeHigh << 32; +#else + struct stat st; + + STATIC_ASSERT_MSG(sizeof(off_t) <= sizeof(uint64_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + if (fstat(fd, &st)) + return errno; + + *length = st.st_size; +#endif + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd) { +#if defined(_WIN32) || defined(_WIN64) + switch (GetFileType(fd)) { + case FILE_TYPE_DISK: + return MDBX_RESULT_FALSE; + case FILE_TYPE_CHAR: + case FILE_TYPE_PIPE: + return MDBX_RESULT_TRUE; + default: + return GetLastError(); + } +#else + struct stat info; + if (fstat(fd, &info)) + return errno; + switch (info.st_mode & S_IFMT) { + case S_IFBLK: + case S_IFREG: + return MDBX_RESULT_FALSE; + case S_IFCHR: + case S_IFIFO: + case S_IFSOCK: + return MDBX_RESULT_TRUE; + case S_IFDIR: + case S_IFLNK: + default: + return MDBX_INCOMPATIBLE; + } +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length) { +#if defined(_WIN32) || defined(_WIN64) + if (mdbx_SetFileInformationByHandle) { + FILE_END_OF_FILE_INFO EndOfFileInfo; + EndOfFileInfo.EndOfFile.QuadPart = length; + return mdbx_SetFileInformationByHandle(fd, FileEndOfFileInfo, + &EndOfFileInfo, + sizeof(FILE_END_OF_FILE_INFO)) + ? MDBX_SUCCESS + : GetLastError(); + } else { + LARGE_INTEGER li; + li.QuadPart = length; + return (SetFilePointerEx(fd, li, NULL, FILE_BEGIN) && SetEndOfFile(fd)) + ? MDBX_SUCCESS + : GetLastError(); + } +#else + STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + return ftruncate(fd, length) == 0 ? MDBX_SUCCESS : errno; +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_fseek(mdbx_filehandle_t fd, uint64_t pos) { +#if defined(_WIN32) || defined(_WIN64) + LARGE_INTEGER li; + li.QuadPart = pos; + return SetFilePointerEx(fd, li, NULL, FILE_BEGIN) ? MDBX_SUCCESS + : GetLastError(); +#else + STATIC_ASSERT_MSG(sizeof(off_t) >= sizeof(size_t), + "libmdbx requires 64-bit file I/O on 64-bit systems"); + return (lseek(fd, pos, SEEK_SET) < 0) ? errno : MDBX_SUCCESS; +#endif +} + +/*----------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC int +mdbx_thread_create(mdbx_thread_t *thread, + THREAD_RESULT(THREAD_CALL *start_routine)(void *), + void *arg) { +#if defined(_WIN32) || defined(_WIN64) + *thread = CreateThread(NULL, 0, start_routine, arg, 0, NULL); + return *thread ? MDBX_SUCCESS : GetLastError(); +#else + return pthread_create(thread, NULL, start_routine, arg); +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_thread_join(mdbx_thread_t thread) { +#if defined(_WIN32) || defined(_WIN64) + DWORD code = WaitForSingleObject(thread, INFINITE); + return waitstatus2errcode(code); +#else + void *unused_retval = &unused_retval; + return pthread_join(thread, &unused_retval); +#endif +} + +/*----------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC int mdbx_msync(mdbx_mmap_t *map, size_t offset, + size_t length, int async) { + uint8_t *ptr = (uint8_t *)map->address + offset; +#if defined(_WIN32) || defined(_WIN64) + if (FlushViewOfFile(ptr, length) && (async || FlushFileBuffers(map->fd))) + return MDBX_SUCCESS; + return GetLastError(); +#else +#if defined(__linux__) || defined(__gnu_linux__) + if (async && mdbx_linux_kernel_version > 0x02061300) + /* Since Linux 2.6.19, MS_ASYNC is in fact a no-op, + since the kernel properly tracks dirty pages and flushes them to storage + as necessary. */ + return MDBX_SUCCESS; +#endif /* Linux */ + const int mode = async ? MS_ASYNC : MS_SYNC; + int rc = (msync(ptr, length, mode) == 0) ? MDBX_SUCCESS : errno; + return rc; +#endif +} + +MDBX_INTERNAL_FUNC int mdbx_check_fs_rdonly(mdbx_filehandle_t handle, + const char *pathname, int err) { +#if defined(_WIN32) || defined(_WIN64) + (void)pathname; + (void)err; + if (!mdbx_GetVolumeInformationByHandleW) + return MDBX_ENOSYS; + DWORD unused, flags; + if (!mdbx_GetVolumeInformationByHandleW(handle, nullptr, 0, nullptr, &unused, + &flags, nullptr, 0)) + return GetLastError(); + if ((flags & FILE_READ_ONLY_VOLUME) == 0) + return MDBX_EACCESS; +#else + struct statvfs info; + if (err != MDBX_ENOFILE) { + if (statvfs(pathname, &info)) + return errno; + if ((info.f_flag & ST_RDONLY) == 0) + return err; + } + if (fstatvfs(handle, &info)) + return errno; + if ((info.f_flag & ST_RDONLY) == 0) + return (err == MDBX_ENOFILE) ? MDBX_EACCESS : err; +#endif /* !Windows */ + return MDBX_SUCCESS; +} + +static int mdbx_check_fs_local(mdbx_filehandle_t handle, int flags) { + if (flags & MDBX_EXCLUSIVE) + return 0; + +#if defined(_WIN32) || defined(_WIN64) + if (mdbx_RunningUnderWine() && !(flags & MDBX_EXCLUSIVE)) + return ERROR_NOT_CAPABLE /* workaround for Wine */; + + if (GetFileType(handle) != FILE_TYPE_DISK) + return ERROR_FILE_OFFLINE; + + if (mdbx_GetFileInformationByHandleEx) { + FILE_REMOTE_PROTOCOL_INFO RemoteProtocolInfo; + if (mdbx_GetFileInformationByHandleEx(handle, FileRemoteProtocolInfo, + &RemoteProtocolInfo, + sizeof(RemoteProtocolInfo))) { + if ((RemoteProtocolInfo.Flags & REMOTE_PROTOCOL_INFO_FLAG_OFFLINE) && + !(flags & MDBX_RDONLY)) + return ERROR_FILE_OFFLINE; + if (!(RemoteProtocolInfo.Flags & REMOTE_PROTOCOL_INFO_FLAG_LOOPBACK) && + !(flags & MDBX_EXCLUSIVE)) + return ERROR_REMOTE_STORAGE_MEDIA_ERROR; + } + } + + if (mdbx_NtFsControlFile) { + NTSTATUS rc; + struct { + WOF_EXTERNAL_INFO wof_info; + union { + WIM_PROVIDER_EXTERNAL_INFO wim_info; + FILE_PROVIDER_EXTERNAL_INFO_V1 file_info; + }; + size_t reserved_for_microsoft_madness[42]; + } GetExternalBacking_OutputBuffer; + IO_STATUS_BLOCK StatusBlock; + rc = mdbx_NtFsControlFile(handle, NULL, NULL, NULL, &StatusBlock, + FSCTL_GET_EXTERNAL_BACKING, NULL, 0, + &GetExternalBacking_OutputBuffer, + sizeof(GetExternalBacking_OutputBuffer)); + if (NT_SUCCESS(rc)) { + if (!(flags & MDBX_EXCLUSIVE)) + return ERROR_REMOTE_STORAGE_MEDIA_ERROR; + } else if (rc != STATUS_OBJECT_NOT_EXTERNALLY_BACKED && + rc != STATUS_INVALID_DEVICE_REQUEST) + return ntstatus2errcode(rc); + } + + if (mdbx_GetVolumeInformationByHandleW && mdbx_GetFinalPathNameByHandleW) { + WCHAR *PathBuffer = mdbx_malloc(sizeof(WCHAR) * INT16_MAX); + if (!PathBuffer) + return MDBX_ENOMEM; + + int rc = MDBX_SUCCESS; + DWORD VolumeSerialNumber, FileSystemFlags; + if (!mdbx_GetVolumeInformationByHandleW(handle, PathBuffer, INT16_MAX, + &VolumeSerialNumber, NULL, + &FileSystemFlags, NULL, 0)) { + rc = GetLastError(); + goto bailout; + } + + if ((flags & MDBX_RDONLY) == 0) { + if (FileSystemFlags & + (FILE_SEQUENTIAL_WRITE_ONCE | FILE_READ_ONLY_VOLUME | + FILE_VOLUME_IS_COMPRESSED)) { + rc = ERROR_REMOTE_STORAGE_MEDIA_ERROR; + goto bailout; + } + } + + if (!mdbx_GetFinalPathNameByHandleW(handle, PathBuffer, INT16_MAX, + FILE_NAME_NORMALIZED | + VOLUME_NAME_NT)) { + rc = GetLastError(); + goto bailout; + } + + if (_wcsnicmp(PathBuffer, L"\\Device\\Mup\\", 12) == 0) { + if (!(flags & MDBX_EXCLUSIVE)) { + rc = ERROR_REMOTE_STORAGE_MEDIA_ERROR; + goto bailout; + } + } else if (mdbx_GetFinalPathNameByHandleW(handle, PathBuffer, INT16_MAX, + FILE_NAME_NORMALIZED | + VOLUME_NAME_DOS)) { + UINT DriveType = GetDriveTypeW(PathBuffer); + if (DriveType == DRIVE_NO_ROOT_DIR && + _wcsnicmp(PathBuffer, L"\\\\?\\", 4) == 0 && + _wcsnicmp(PathBuffer + 5, L":\\", 2) == 0) { + PathBuffer[7] = 0; + DriveType = GetDriveTypeW(PathBuffer + 4); + } + switch (DriveType) { + case DRIVE_CDROM: + if (flags & MDBX_RDONLY) + break; + // fall through + case DRIVE_UNKNOWN: + case DRIVE_NO_ROOT_DIR: + case DRIVE_REMOTE: + default: + if (!(flags & MDBX_EXCLUSIVE)) + rc = ERROR_REMOTE_STORAGE_MEDIA_ERROR; + // fall through + case DRIVE_REMOVABLE: + case DRIVE_FIXED: + case DRIVE_RAMDISK: + break; + } + } + bailout: + mdbx_free(PathBuffer); + return rc; + } + +#else + + struct statvfs statvfs_info; + if (fstatvfs(handle, &statvfs_info)) + return errno; +#if defined(ST_LOCAL) || defined(ST_EXPORTED) + const unsigned long st_flags = statvfs_info.f_flag; +#endif /* ST_LOCAL || ST_EXPORTED */ + +#if defined(__NetBSD__) + const unsigned type = 0; + const char *const name = statvfs_info.f_fstypename; + const size_t name_len = VFS_NAMELEN; +#elif defined(_AIX) || defined(__OS400__) + const char *const name = statvfs_info.f_basetype; + const size_t name_len = sizeof(statvfs_info.f_basetype); + struct stat st; + if (fstat(handle, &st)) + return errno; + const unsigned type = st.st_vfstype; + if ((st.st_flag & FS_REMOTE) != 0 && !(flags & MDBX_EXCLUSIVE)) + return MDBX_EREMOTE; +#elif defined(FSTYPSZ) || defined(_FSTYPSZ) + const unsigned type = 0; + const char *const name = statvfs_info.f_basetype; + const size_t name_len = sizeof(statvfs_info.f_basetype); +#elif defined(__sun) || defined(__SVR4) || defined(__svr4__) || \ + defined(ST_FSTYPSZ) || defined(_ST_FSTYPSZ) + const unsigned type = 0; + struct stat st; + if (fstat(handle, &st)) + return errno; + const char *const name = st.st_fstype; + const size_t name_len = strlen(name); +#else + struct statfs statfs_info; + if (fstatfs(handle, &statfs_info)) + return errno; +#if defined(__OpenBSD__) + const unsigned type = 0; +#else + const unsigned type = statfs_info.f_type; +#endif +#if defined(MNT_LOCAL) || defined(MNT_EXPORTED) + const unsigned long mnt_flags = statfs_info.f_flags; +#endif /* MNT_LOCAL || MNT_EXPORTED */ +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ + defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \ + defined(__APPLE__) || defined(__MACH__) || defined(MFSNAMELEN) || \ + defined(MFSTYPENAMELEN) || defined(VFS_NAMELEN) + const char *const name = statfs_info.f_fstypename; + const size_t name_len = sizeof(statfs_info.f_fstypename); +#elif defined(__ANDROID_API__) && __ANDROID_API__ < 21 + const char *const name = ""; + const unsigned name_len = 0; +#else + + const char *name = ""; + unsigned name_len = 0; + + struct stat st; + if (fstat(handle, &st)) + return errno; + + char pathbuf[PATH_MAX]; + FILE *mounted = nullptr; +#if defined(__linux__) || defined(__gnu_linux__) + mounted = setmntent("/proc/mounts", "r"); +#endif /* Linux */ + if (!mounted) + mounted = setmntent("/etc/mtab", "r"); + if (mounted) { + const struct mntent *ent; +#if defined(_BSD_SOURCE) || defined(_SVID_SOURCE) || defined(__BIONIC__) || \ + (defined(_DEFAULT_SOURCE) && __GLIBC_PREREQ(2, 19)) + struct mntent entbuf; + const bool should_copy = false; + while (nullptr != + (ent = getmntent_r(mounted, &entbuf, pathbuf, sizeof(pathbuf)))) +#else + const bool should_copy = true; + while (nullptr != (ent = getmntent(mounted))) +#endif + { + struct stat mnt; + if (!stat(ent->mnt_dir, &mnt) && mnt.st_dev == st.st_dev) { + if (should_copy) { + name = + strncpy(pathbuf, ent->mnt_fsname, name_len = sizeof(pathbuf) - 1); + pathbuf[name_len] = 0; + } else { + name = ent->mnt_fsname; + name_len = strlen(name); + } + break; + } + } + endmntent(mounted); + } +#endif /* !xBSD && !Android/Bionic */ +#endif + + if (name_len) { + if (((name_len > 2 && strncasecmp("nfs", name, 3) == 0) || + strncasecmp("cifs", name, name_len) == 0 || + strncasecmp("ncpfs", name, name_len) == 0 || + strncasecmp("smbfs", name, name_len) == 0 || + ((name_len > 3 && strncasecmp("fuse", name, 4) == 0) && + strncasecmp("fuseblk", name, name_len) != 0)) && + !(flags & MDBX_EXCLUSIVE)) + return MDBX_EREMOTE; + if (strcasecmp("ftp", name) == 0 || strcasecmp("http", name) == 0 || + strcasecmp("sshfs", name) == 0) + return MDBX_EREMOTE; + } + +#ifdef ST_LOCAL + if ((st_flags & ST_LOCAL) == 0 && !(flags & MDBX_EXCLUSIVE)) + return MDBX_EREMOTE; +#elif defined(MNT_LOCAL) + if ((mnt_flags & MNT_LOCAL) == 0 && !(flags & MDBX_EXCLUSIVE)) + return MDBX_EREMOTE; +#endif /* ST/MNT_LOCAL */ + +#ifdef ST_EXPORTED + if ((st_flags & ST_EXPORTED) != 0 && !(flags & MDBX_RDONLY)) + return MDBX_EREMOTE; +#elif defined(MNT_EXPORTED) + if ((mnt_flags & MNT_EXPORTED) != 0 && !(flags & MDBX_RDONLY)) + return MDBX_EREMOTE; +#endif /* ST/MNT_EXPORTED */ + + switch (type) { + case 0xFF534D42 /* CIFS_MAGIC_NUMBER */: + case 0x6969 /* NFS_SUPER_MAGIC */: + case 0x564c /* NCP_SUPER_MAGIC */: + case 0x517B /* SMB_SUPER_MAGIC */: +#if defined(__digital__) || defined(__osf__) || defined(__osf) + case 0x0E /* Tru64 NFS */: +#endif +#ifdef ST_FST_NFS + case ST_FST_NFS: +#endif + if ((flags & MDBX_EXCLUSIVE) == 0) + return MDBX_EREMOTE; + case 0: + default: + break; + } +#endif /* Unix */ + + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map, + const size_t size, const size_t limit, + const unsigned options) { + assert(size <= limit); + map->limit = 0; + map->current = 0; + map->address = nullptr; +#if defined(_WIN32) || defined(_WIN64) + map->section = NULL; + map->filesize = 0; +#endif /* Windows */ + + int err = mdbx_check_fs_local(map->fd, flags); + if (unlikely(err != MDBX_SUCCESS)) + return err; + + if ((flags & MDBX_RDONLY) == 0 && (options & MMAP_OPTION_TRUNCATE) != 0) { + err = mdbx_ftruncate(map->fd, size); + if (err != MDBX_SUCCESS) + return err; +#if defined(_WIN32) || defined(_WIN64) + map->filesize = size; +#else + map->current = size; +#endif + } else { + uint64_t filesize = 0; + err = mdbx_filesize(map->fd, &filesize); + if (err != MDBX_SUCCESS) + return err; +#if defined(_WIN32) || defined(_WIN64) + map->filesize = filesize; +#else + map->current = (filesize > limit) ? limit : (size_t)filesize; +#endif + } + +#if defined(_WIN32) || defined(_WIN64) + LARGE_INTEGER SectionSize; + SectionSize.QuadPart = size; + err = NtCreateSection( + &map->section, + /* DesiredAccess */ + (flags & MDBX_WRITEMAP) + ? SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE | + SECTION_MAP_WRITE + : SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE, + /* ObjectAttributes */ NULL, /* MaximumSize (InitialSize) */ &SectionSize, + /* SectionPageProtection */ + (flags & MDBX_RDONLY) ? PAGE_READONLY : PAGE_READWRITE, + /* AllocationAttributes */ SEC_RESERVE, map->fd); + if (!NT_SUCCESS(err)) + return ntstatus2errcode(err); + + SIZE_T ViewSize = + (flags & MDBX_RDONLY) ? 0 : mdbx_RunningUnderWine() ? size : limit; + err = NtMapViewOfSection( + map->section, GetCurrentProcess(), &map->address, + /* ZeroBits */ 0, + /* CommitSize */ 0, + /* SectionOffset */ NULL, &ViewSize, + /* InheritDisposition */ ViewUnmap, + /* AllocationType */ (flags & MDBX_RDONLY) ? 0 : MEM_RESERVE, + /* Win32Protect */ + (flags & MDBX_WRITEMAP) ? PAGE_READWRITE : PAGE_READONLY); + if (!NT_SUCCESS(err)) { + NtClose(map->section); + map->section = 0; + map->address = nullptr; + return ntstatus2errcode(err); + } + assert(map->address != MAP_FAILED); + + map->current = (size_t)SectionSize.QuadPart; + map->limit = ViewSize; + +#else + +#ifndef MAP_TRYFIXED +#define MAP_TRYFIXED 0 +#endif + +#ifndef MAP_HASSEMAPHORE +#define MAP_HASSEMAPHORE 0 +#endif + +#ifndef MAP_CONCEAL +#define MAP_CONCEAL 0 +#endif + +#ifndef MAP_NOSYNC +#define MAP_NOSYNC 0 +#endif + + map->address = mmap( + NULL, limit, (flags & MDBX_WRITEMAP) ? PROT_READ | PROT_WRITE : PROT_READ, + MAP_SHARED | MAP_FILE | + (F_ISSET(flags, MDBX_UTTERLY_NOSYNC) ? MAP_NOSYNC : 0) | + ((options & MMAP_OPTION_SEMAPHORE) ? MAP_HASSEMAPHORE | MAP_NOSYNC + : MAP_CONCEAL), + map->fd, 0); + + if (unlikely(map->address == MAP_FAILED)) { + map->limit = 0; + map->current = 0; + map->address = nullptr; + return errno; + } + map->limit = limit; + +#ifdef MADV_DONTFORK + if (unlikely(madvise(map->address, map->limit, MADV_DONTFORK) != 0)) + return errno; +#endif +#ifdef MADV_NOHUGEPAGE + (void)madvise(map->address, map->limit, MADV_NOHUGEPAGE); +#endif + +#endif + + VALGRIND_MAKE_MEM_DEFINED(map->address, map->current); + ASAN_UNPOISON_MEMORY_REGION(map->address, map->current); + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_munmap(mdbx_mmap_t *map) { + VALGRIND_MAKE_MEM_NOACCESS(map->address, map->current); + /* Unpoisoning is required for ASAN to avoid false-positive diagnostic + * when this memory will re-used by malloc or another mmaping. + * See https://github.com/erthink/libmdbx/pull/93#issuecomment-613687203 */ + ASAN_UNPOISON_MEMORY_REGION(map->address, map->limit); +#if defined(_WIN32) || defined(_WIN64) + if (map->section) + NtClose(map->section); + NTSTATUS rc = NtUnmapViewOfSection(GetCurrentProcess(), map->address); + if (!NT_SUCCESS(rc)) + ntstatus2errcode(rc); +#else + if (unlikely(munmap(map->address, map->limit))) + return errno; +#endif + + map->limit = 0; + map->current = 0; + map->address = nullptr; + return MDBX_SUCCESS; +} + +MDBX_INTERNAL_FUNC int mdbx_mresize(int flags, mdbx_mmap_t *map, size_t size, + size_t limit) { + assert(size <= limit); +#if defined(_WIN32) || defined(_WIN64) + assert(size != map->current || limit != map->limit || size < map->filesize); + + NTSTATUS status; + LARGE_INTEGER SectionSize; + int err, rc = MDBX_SUCCESS; + + if (!(flags & MDBX_RDONLY) && limit == map->limit && size > map->current) { + /* growth rw-section */ + if (!mdbx_NtExtendSection) + return MDBX_UNABLE_EXTEND_MAPSIZE /* workaround for Wine */; + SectionSize.QuadPart = size; + status = mdbx_NtExtendSection(map->section, &SectionSize); + if (!NT_SUCCESS(status)) + return ntstatus2errcode(status); + map->current = size; + if (map->filesize < size) + map->filesize = size; + return MDBX_SUCCESS; + } + + if (limit > map->limit) { + /* check ability of address space for growth before unmap */ + PVOID BaseAddress = (PBYTE)map->address + map->limit; + SIZE_T RegionSize = limit - map->limit; + status = NtAllocateVirtualMemory(GetCurrentProcess(), &BaseAddress, 0, + &RegionSize, MEM_RESERVE, PAGE_NOACCESS); + if (status == /* STATUS_CONFLICTING_ADDRESSES */ 0xC0000018) + return MDBX_UNABLE_EXTEND_MAPSIZE; + if (!NT_SUCCESS(status)) + return ntstatus2errcode(status); + + status = NtFreeVirtualMemory(GetCurrentProcess(), &BaseAddress, &RegionSize, + MEM_RELEASE); + if (!NT_SUCCESS(status)) + return ntstatus2errcode(status); + } + + /* Windows unable: + * - shrink a mapped file; + * - change size of mapped view; + * - extend read-only mapping; + * Therefore we should unmap/map entire section. */ + status = NtUnmapViewOfSection(GetCurrentProcess(), map->address); + if (!NT_SUCCESS(status)) + return ntstatus2errcode(status); + status = NtClose(map->section); + map->section = NULL; + PVOID ReservedAddress = NULL; + SIZE_T ReservedSize = limit; + + if (!NT_SUCCESS(status)) { + bailout_ntstatus: + err = ntstatus2errcode(status); + bailout: + map->address = NULL; + map->current = map->limit = 0; + if (ReservedAddress) { + ReservedSize = 0; + status = NtFreeVirtualMemory(GetCurrentProcess(), &ReservedAddress, + &ReservedSize, MEM_RELEASE); + assert(NT_SUCCESS(status)); + (void)status; + } + return err; + } + + /* resizing of the file may take a while, + * therefore we reserve address space to avoid occupy it by other threads */ + ReservedAddress = map->address; + status = NtAllocateVirtualMemory(GetCurrentProcess(), &ReservedAddress, 0, + &ReservedSize, MEM_RESERVE, PAGE_NOACCESS); + if (!NT_SUCCESS(status)) { + ReservedAddress = NULL; + if (status != /* STATUS_CONFLICTING_ADDRESSES */ 0xC0000018) + goto bailout_ntstatus /* no way to recovery */; + + /* assume we can change base address if mapping size changed or prev address + * couldn't be used */ + map->address = NULL; + } + +retry_file_and_section: + err = mdbx_filesize(map->fd, &map->filesize); + if (err != MDBX_SUCCESS) + goto bailout; + + if ((flags & MDBX_RDONLY) == 0 && map->filesize != size) { + err = mdbx_ftruncate(map->fd, size); + if (err == MDBX_SUCCESS) + map->filesize = size; + /* ignore error, because Windows unable shrink file + * that already mapped (by another process) */ + } + + SectionSize.QuadPart = size; + status = NtCreateSection( + &map->section, + /* DesiredAccess */ + (flags & MDBX_WRITEMAP) + ? SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE | + SECTION_MAP_WRITE + : SECTION_QUERY | SECTION_MAP_READ | SECTION_EXTEND_SIZE, + /* ObjectAttributes */ NULL, + /* MaximumSize (InitialSize) */ &SectionSize, + /* SectionPageProtection */ + (flags & MDBX_RDONLY) ? PAGE_READONLY : PAGE_READWRITE, + /* AllocationAttributes */ SEC_RESERVE, map->fd); + + if (!NT_SUCCESS(status)) + goto bailout_ntstatus; + + if (ReservedAddress) { + /* release reserved address space */ + ReservedSize = 0; + status = NtFreeVirtualMemory(GetCurrentProcess(), &ReservedAddress, + &ReservedSize, MEM_RELEASE); + ReservedAddress = NULL; + if (!NT_SUCCESS(status)) + goto bailout_ntstatus; + } + +retry_mapview:; + SIZE_T ViewSize = (flags & MDBX_RDONLY) ? size : limit; + status = NtMapViewOfSection( + map->section, GetCurrentProcess(), &map->address, + /* ZeroBits */ 0, + /* CommitSize */ 0, + /* SectionOffset */ NULL, &ViewSize, + /* InheritDisposition */ ViewUnmap, + /* AllocationType */ (flags & MDBX_RDONLY) ? 0 : MEM_RESERVE, + /* Win32Protect */ + (flags & MDBX_WRITEMAP) ? PAGE_READWRITE : PAGE_READONLY); + + if (!NT_SUCCESS(status)) { + if (status == /* STATUS_CONFLICTING_ADDRESSES */ 0xC0000018 && + map->address) { + /* try remap at another base address */ + map->address = NULL; + goto retry_mapview; + } + NtClose(map->section); + map->section = NULL; + + if (map->address && (size != map->current || limit != map->limit)) { + /* try remap with previously size and limit, + * but will return MDBX_UNABLE_EXTEND_MAPSIZE on success */ + rc = MDBX_UNABLE_EXTEND_MAPSIZE; + size = map->current; + limit = map->limit; + goto retry_file_and_section; + } + + /* no way to recovery */ + goto bailout_ntstatus; + } + assert(map->address != MAP_FAILED); + + map->current = (size_t)SectionSize.QuadPart; + map->limit = ViewSize; +#else + + uint64_t filesize = 0; + int rc = mdbx_filesize(map->fd, &filesize); + if (rc != MDBX_SUCCESS) + return rc; + + if (flags & MDBX_RDONLY) { + map->current = (filesize > limit) ? limit : (size_t)filesize; + if (map->current != size) + rc = MDBX_UNABLE_EXTEND_MAPSIZE; + } else if (filesize != size) { + rc = mdbx_ftruncate(map->fd, size); + if (rc != MDBX_SUCCESS) + return rc; + map->current = size; + } + + if (limit != map->limit) { +#if defined(MREMAP_MAYMOVE) + void *ptr = mremap(map->address, map->limit, limit, 0); + if (ptr == MAP_FAILED) { + rc = errno; + switch (rc) { + case EAGAIN: + case ENOMEM: + case EFAULT /* MADV_DODUMP / MADV_DONTDUMP are mixed for mmap-range */: + rc = MDBX_UNABLE_EXTEND_MAPSIZE; + } + return rc; + } + map->address = ptr; + map->limit = limit; + +#ifdef MADV_DONTFORK + if (unlikely(madvise(map->address, map->limit, MADV_DONTFORK) != 0)) + return errno; +#endif /* MADV_DONTFORK */ + +#ifdef MADV_NOHUGEPAGE + (void)madvise(map->address, map->limit, MADV_NOHUGEPAGE); +#endif /* MADV_NOHUGEPAGE */ + +#else /* MREMAP_MAYMOVE */ + /* TODO: Perhaps here it is worth to implement suspend/resume threads + * and perform unmap/map as like for Windows. */ + rc = MDBX_UNABLE_EXTEND_MAPSIZE; +#endif /* !MREMAP_MAYMOVE */ + } +#endif + return rc; +} + +/*----------------------------------------------------------------------------*/ + +MDBX_INTERNAL_FUNC __cold void mdbx_osal_jitter(bool tiny) { + for (;;) { +#if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || \ + defined(__x86_64__) + const unsigned salt = 277u * (unsigned)__rdtsc(); +#else + const unsigned salt = rand(); +#endif + + const unsigned coin = salt % (tiny ? 29u : 43u); + if (coin < 43 / 3) + break; +#if defined(_WIN32) || defined(_WIN64) + SwitchToThread(); + if (coin > 43 * 2 / 3) + Sleep(1); +#else + sched_yield(); + if (coin > 43 * 2 / 3) + usleep(coin); +#endif + } +} + +#if defined(_WIN32) || defined(_WIN64) +#elif defined(__APPLE__) || defined(__MACH__) +#include +#elif defined(__linux__) || defined(__gnu_linux__) +static __cold clockid_t choice_monoclock(void) { + struct timespec probe; +#if defined(CLOCK_BOOTTIME) + if (clock_gettime(CLOCK_BOOTTIME, &probe) == 0) + return CLOCK_BOOTTIME; +#elif defined(CLOCK_MONOTONIC_RAW) + if (clock_gettime(CLOCK_MONOTONIC_RAW, &probe) == 0) + return CLOCK_MONOTONIC_RAW; +#elif defined(CLOCK_MONOTONIC_COARSE) + if (clock_gettime(CLOCK_MONOTONIC_COARSE, &probe) == 0) + return CLOCK_MONOTONIC_COARSE; +#endif + return CLOCK_MONOTONIC; +} +#endif + +/*----------------------------------------------------------------------------*/ + +#if defined(_WIN32) || defined(_WIN64) +static LARGE_INTEGER performance_frequency; +#elif defined(__APPLE__) || defined(__MACH__) +static uint64_t ratio_16dot16_to_monotine; +#endif + +MDBX_INTERNAL_FUNC uint64_t +mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16) { +#if defined(_WIN32) || defined(_WIN64) + if (unlikely(performance_frequency.QuadPart == 0)) + QueryPerformanceFrequency(&performance_frequency); + const uint64_t ratio = performance_frequency.QuadPart; +#elif defined(__APPLE__) || defined(__MACH__) + if (unlikely(ratio_16dot16_to_monotine == 0)) { + mach_timebase_info_data_t ti; + mach_timebase_info(&ti); + ratio_16dot16_to_monotine = UINT64_C(1000000000) * ti.denom / ti.numer; + } + const uint64_t ratio = ratio_16dot16_to_monotine; +#else + const uint64_t ratio = UINT64_C(1000000000); +#endif + return (ratio * seconds_16dot16 + 32768) >> 16; +} + +MDBX_INTERNAL_FUNC uint32_t mdbx_osal_monotime_to_16dot16(uint64_t monotime) { + static uint64_t limit; + if (unlikely(monotime > limit)) { + if (limit != 0) + return UINT32_MAX; + limit = mdbx_osal_16dot16_to_monotime(UINT32_MAX - 1); + if (monotime > limit) + return UINT32_MAX; + } +#if defined(_WIN32) || defined(_WIN64) + return (uint32_t)((monotime << 16) / performance_frequency.QuadPart); +#elif defined(__APPLE__) || defined(__MACH__) + return (uint32_t)((monotime << 16) / ratio_16dot16_to_monotine); +#else + return (uint32_t)(monotime * 128 / 1953125); +#endif +} + +MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void) { +#if defined(_WIN32) || defined(_WIN64) + LARGE_INTEGER counter; + counter.QuadPart = 0; + QueryPerformanceCounter(&counter); + return counter.QuadPart; +#elif defined(__APPLE__) || defined(__MACH__) + return mach_absolute_time(); +#else + +#if defined(__linux__) || defined(__gnu_linux__) + static clockid_t posix_clockid = -1; + if (unlikely(posix_clockid < 0)) + posix_clockid = choice_monoclock(); +#elif defined(CLOCK_MONOTONIC) +#define posix_clockid CLOCK_MONOTONIC +#else +#define posix_clockid CLOCK_REALTIME +#endif + + struct timespec ts; + if (unlikely(clock_gettime(posix_clockid, &ts) != 0)) { + ts.tv_nsec = 0; + ts.tv_sec = 0; + } + return ts.tv_sec * UINT64_C(1000000000) + ts.tv_nsec; +#endif +} + +/*----------------------------------------------------------------------------*/ + +static void bootid_shake(bin128_t *p) { + /* Bob Jenkins's PRNG: https://burtleburtle.net/bob/rand/smallprng.html */ + const uint32_t e = p->a - (p->b << 23 | p->b >> 9); + p->a = p->b ^ (p->c << 16 | p->c >> 16); + p->b = p->c + (p->d << 11 | p->d >> 21); + p->c = p->d + e; + p->d = e + p->a; +} + +static void bootid_collect(bin128_t *p, const void *s, size_t n) { + p->y += UINT64_C(64526882297375213); + bootid_shake(p); + for (size_t i = 0; i < n; ++i) { + bootid_shake(p); + p->y ^= UINT64_C(48797879452804441) * ((const uint8_t *)s)[i]; + bootid_shake(p); + p->y += 14621231; + } + bootid_shake(p); + + /* minor non-linear tomfoolery */ + const unsigned z = p->x % 61; + p->y = p->y << z | p->y >> (64 - z); + bootid_shake(p); + bootid_shake(p); + const unsigned q = p->x % 59; + p->y = p->y << q | p->y >> (64 - q); + bootid_shake(p); + bootid_shake(p); + bootid_shake(p); +} + +#if defined(_WIN32) || defined(_WIN64) + +static uint64_t windows_systemtime_ms() { + FILETIME ft; + GetSystemTimeAsFileTime(&ft); + return ((uint64_t)ft.dwHighDateTime << 32 | ft.dwLowDateTime) / 10000ul; +} + +static uint64_t windows_bootime(void) { + unsigned confirmed = 0; + uint64_t boottime = 0; + uint64_t up0 = mdbx_GetTickCount64(); + uint64_t st0 = windows_systemtime_ms(); + for (uint64_t fuse = st0; up0 && st0 < fuse + 1000 * 1000u / 42;) { + YieldProcessor(); + const uint64_t up1 = mdbx_GetTickCount64(); + const uint64_t st1 = windows_systemtime_ms(); + if (st1 > fuse && st1 == st0 && up1 == up0) { + uint64_t diff = st1 - up1; + if (boottime == diff) { + if (++confirmed > 4) + return boottime; + } else { + confirmed = 0; + boottime = diff; + } + fuse = st1; + Sleep(1); + } + st0 = st1; + up0 = up1; + } + return 0; +} + +typedef LSTATUS (APIENTRY *pfnRegGetValueA)(HKEY, LPCSTR, LPCSTR, DWORD, LPDWORD, PVOID, LPDWORD); +static pfnRegGetValueA fnRegGetValueA = nullptr; + +static LSTATUS APIENTRY stubRegGetValueA(HKEY hkey, LPCSTR lpSubKey, LPCSTR lpValue, DWORD dwFlags, LPDWORD pdwType, PVOID pvData, LPDWORD pcbData) +{ + HKEY tmp; + LSTATUS rc = RegOpenKeyA(hkey, lpSubKey, &tmp); + if (rc != 0) + return rc; + + DWORD dwType = (dwFlags == RRF_RT_ANY) ? REG_SZ : REG_DWORD; + rc = RegQueryValueExA(tmp, lpValue, 0, &dwType, pvData, pcbData); + if (rc != 0 && dwFlags == RRF_RT_DWORD) { + rc = 0; + *(DWORD *)pvData = 0xBABAEBA; + *pcbData = sizeof(DWORD); + } + RegCloseKey(tmp); + return rc; +} + +static LSTATUS mdbx_RegGetValue(HKEY hkey, LPCSTR lpSubKey, LPCSTR lpValue, + DWORD dwFlags, LPDWORD pdwType, PVOID pvData, + LPDWORD pcbData) { + if (fnRegGetValueA == nullptr) { + fnRegGetValueA = (pfnRegGetValueA)GetProcAddress(GetModuleHandleA("advapi32.dll"), "RegGetValueA"); + if (fnRegGetValueA == nullptr) + fnRegGetValueA = stubRegGetValueA; + } + + LSTATUS rc = + fnRegGetValueA(hkey, lpSubKey, lpValue, dwFlags, pdwType, pvData, pcbData); + if (rc != ERROR_FILE_NOT_FOUND) + return rc; + + rc = fnRegGetValueA(hkey, lpSubKey, lpValue, + dwFlags | 0x00010000 /* RRF_SUBKEY_WOW6464KEY */, pdwType, + pvData, pcbData); + if (rc != ERROR_FILE_NOT_FOUND) + return rc; + return fnRegGetValueA(hkey, lpSubKey, lpValue, + dwFlags | 0x00020000 /* RRF_SUBKEY_WOW6432KEY */, pdwType, + pvData, pcbData); +} +#endif + +static __cold __maybe_unused bool bootid_parse_uuid(bin128_t *s, const void *p, + const size_t n) { + if (n > 31) { + unsigned bits = 0; + for (unsigned i = 0; i < n; ++i) /* try parse an UUID in text form */ { + uint8_t c = ((const uint8_t *)p)[i]; + if (c >= '0' && c <= '9') + c -= '0'; + else if (c >= 'a' && c <= 'f') + c -= 'a' - 10; + else if (c >= 'A' && c <= 'F') + c -= 'A' - 10; + else + continue; + assert(c <= 15); + c ^= s->y >> 60; + s->y = s->y << 4 | s->x >> 60; + s->x = s->x << 4 | c; + bits += 4; + } + if (bits > 42 * 3) + /* UUID parsed successfully */ + return true; + } + + if (n > 15) /* is enough handle it as a binary? */ { + if (n == sizeof(bin128_t)) { + bin128_t aligned; + memcpy(&aligned, p, sizeof(bin128_t)); + s->x += aligned.x; + s->y += aligned.y; + } else + bootid_collect(s, p, n); + return true; + } + + if (n) + bootid_collect(s, p, n); + return false; +} + +__cold MDBX_INTERNAL_FUNC bin128_t mdbx_osal_bootid(void) { + bin128_t bin = {{0, 0}}; + bool got_machineid = false, got_boottime = false, got_bootseq = false; + +#if defined(__linux__) || defined(__gnu_linux__) + { + const int fd = + open("/proc/sys/kernel/random/boot_id", O_RDONLY | O_NOFOLLOW); + if (fd != -1) { + struct statfs fs; + char buf[42]; + const ssize_t len = + (fstatfs(fd, &fs) == 0 && fs.f_type == /* procfs */ 0x9FA0) + ? read(fd, buf, sizeof(buf)) + : -1; + close(fd); + if (len > 0 && bootid_parse_uuid(&bin, buf, len)) + return bin; + } + } +#endif /* Linux */ + +#if defined(__APPLE__) || defined(__MACH__) + { + char buf[42]; + size_t len = sizeof(buf); + if (!sysctlbyname("kern.bootsessionuuid", buf, &len, nullptr, 0) && + bootid_parse_uuid(&bin, buf, len)) + return bin; + +#if defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \ + __MAC_OS_X_VERSION_MIN_REQUIRED > 1050 + uuid_t uuid; + struct timespec wait = {0, 1000000000u / 42}; + if (!gethostuuid(uuid, &wait) && + bootid_parse_uuid(&bin, uuid, sizeof(uuid))) + got_machineid = true; +#endif /* > 10.5 */ + + struct timeval boottime; + len = sizeof(boottime); + if (!sysctlbyname("kern.boottime", &boottime, &len, nullptr, 0) && + len == sizeof(boottime) && boottime.tv_sec) + got_boottime = true; + } +#endif /* Apple/Darwin */ + +#if defined(_WIN32) || defined(_WIN64) + { + union buf { + DWORD BootId; + DWORD BaseTime; + SYSTEM_TIMEOFDAY_INFORMATION SysTimeOfDayInfo; + struct { + LARGE_INTEGER BootTime; + LARGE_INTEGER CurrentTime; + LARGE_INTEGER TimeZoneBias; + ULONG TimeZoneId; + ULONG Reserved; + ULONGLONG BootTimeBias; + ULONGLONG SleepTimeBias; + } SysTimeOfDayInfoHacked; + wchar_t MachineGuid[42]; + char DigitalProductId[248]; + } buf; + + static const char HKLM_MicrosoftCryptography[] = + "SOFTWARE\\Microsoft\\Cryptography"; + DWORD len = sizeof(buf); + /* Windows is madness and must die */ + if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_MicrosoftCryptography, + "MachineGuid", RRF_RT_ANY, NULL, &buf.MachineGuid, + &len) == ERROR_SUCCESS && + len > 42 && len < sizeof(buf)) + got_machineid = bootid_parse_uuid(&bin, &buf.MachineGuid, len); + + if (!got_machineid) { + /* again, Windows is madness */ + static const char HKLM_WindowsNT[] = + "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion"; + static const char HKLM_WindowsNT_DPK[] = + "SOFTWARE\\Microsoft\\Windows " + "NT\\CurrentVersion\\DefaultProductKey"; + static const char HKLM_WindowsNT_DPK2[] = + "SOFTWARE\\Microsoft\\Windows " + "NT\\CurrentVersion\\DefaultProductKey2"; + + len = sizeof(buf); + if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_WindowsNT, + "DigitalProductId", RRF_RT_ANY, NULL, + &buf.DigitalProductId, &len) == ERROR_SUCCESS && + len > 42 && len < sizeof(buf)) { + bootid_collect(&bin, &buf.DigitalProductId, len); + got_machineid = true; + } + len = sizeof(buf); + if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_WindowsNT_DPK, + "DigitalProductId", RRF_RT_ANY, NULL, + &buf.DigitalProductId, &len) == ERROR_SUCCESS && + len > 42 && len < sizeof(buf)) { + bootid_collect(&bin, &buf.DigitalProductId, len); + got_machineid = true; + } + len = sizeof(buf); + if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_WindowsNT_DPK2, + "DigitalProductId", RRF_RT_ANY, NULL, + &buf.DigitalProductId, &len) == ERROR_SUCCESS && + len > 42 && len < sizeof(buf)) { + bootid_collect(&bin, &buf.DigitalProductId, len); + got_machineid = true; + } + } + + static const char HKLM_PrefetcherParams[] = + "SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Memory " + "Management\\PrefetchParameters"; + len = sizeof(buf); + if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_PrefetcherParams, "BootId", + RRF_RT_DWORD, NULL, &buf.BootId, + &len) == ERROR_SUCCESS && + len > 1 && len < sizeof(buf)) { + bootid_collect(&bin, &buf.BootId, len); + got_bootseq = true; + } + + len = sizeof(buf); + if (mdbx_RegGetValue(HKEY_LOCAL_MACHINE, HKLM_PrefetcherParams, "BaseTime", + RRF_RT_DWORD, NULL, &buf.BaseTime, + &len) == ERROR_SUCCESS && + len >= sizeof(buf.BaseTime) && buf.BaseTime) { + bootid_collect(&bin, &buf.BaseTime, len); + got_boottime = true; + } + + /* BootTime from SYSTEM_TIMEOFDAY_INFORMATION */ + NTSTATUS status = NtQuerySystemInformation( + 0x03 /* SystemTmeOfDayInformation */, &buf.SysTimeOfDayInfo, + sizeof(buf.SysTimeOfDayInfo), &len); + if (NT_SUCCESS(status) && + len >= offsetof(union buf, SysTimeOfDayInfoHacked.BootTime) + + sizeof(buf.SysTimeOfDayInfoHacked.BootTime) && + buf.SysTimeOfDayInfoHacked.BootTime.QuadPart) { + bootid_collect(&bin, &buf.SysTimeOfDayInfoHacked.BootTime, + sizeof(buf.SysTimeOfDayInfoHacked.BootTime)); + got_boottime = true; + } + + if (!got_boottime) { + uint64_t boottime = windows_bootime(); + if (boottime) { + bootid_collect(&bin, &boottime, sizeof(boottime)); + got_boottime = true; + } + } + } +#endif /* Windows */ + +#if defined(CTL_HW) && defined(HW_UUID) + if (!got_machineid) { + static const int mib[] = {CTL_HW, HW_UUID}; + char buf[42]; + size_t len = sizeof(buf); + if (sysctl( +#ifdef SYSCTL_LEGACY_NONCONST_MIB + (int *) +#endif + mib, + ARRAY_LENGTH(mib), &buf, &len, NULL, 0) == 0) + got_machineid = bootid_parse_uuid(&bin, buf, len); + } +#endif /* CTL_HW && HW_UUID */ + +#if defined(CTL_KERN) && defined(KERN_HOSTUUID) + if (!got_machineid) { + static const int mib[] = {CTL_KERN, KERN_HOSTUUID}; + char buf[42]; + size_t len = sizeof(buf); + if (sysctl( +#ifdef SYSCTL_LEGACY_NONCONST_MIB + (int *) +#endif + mib, + ARRAY_LENGTH(mib), &buf, &len, NULL, 0) == 0) + got_machineid = bootid_parse_uuid(&bin, buf, len); + } +#endif /* CTL_KERN && KERN_HOSTUUID */ + +#if defined(__NetBSD__) + if (!got_machineid) { + char buf[42]; + size_t len = sizeof(buf); + if (sysctlbyname("machdep.dmi.system-uuid", buf, &len, NULL, 0) == 0) + got_machineid = bootid_parse_uuid(&bin, buf, len); + } +#endif /* __NetBSD__ */ + +#if _XOPEN_SOURCE_EXTENDED + if (!got_machineid) { + const int hostid = gethostid(); + if (hostid > 0) { + bootid_collect(&bin, &hostid, sizeof(hostid)); + got_machineid = true; + } + } +#endif /* _XOPEN_SOURCE_EXTENDED */ + + if (!got_machineid) { + lack: + bin.x = bin.y = 0; + return bin; + } + + /*--------------------------------------------------------------------------*/ + +#if defined(CTL_KERN) && defined(KERN_BOOTTIME) + if (!got_boottime) { + static const int mib[] = {CTL_KERN, KERN_BOOTTIME}; + struct timeval boottime; + size_t len = sizeof(boottime); + if (sysctl( +#ifdef SYSCTL_LEGACY_NONCONST_MIB + (int *) +#endif + mib, + ARRAY_LENGTH(mib), &boottime, &len, NULL, 0) == 0 && + len == sizeof(boottime) && boottime.tv_sec) { + bootid_collect(&bin, &boottime, len); + got_boottime = true; + } + } +#endif /* CTL_KERN && KERN_BOOTTIME */ + +#if defined(__sun) || defined(__SVR4) || defined(__svr4__) + if (!got_boottime) { + kstat_ctl_t *kc = kstat_open(); + if (kc) { + kstat_t *kp = kstat_lookup(kc, "unix", 0, "system_misc"); + if (kp && kstat_read(kc, kp, 0) != -1) { + kstat_named_t *kn = (kstat_named_t *)kstat_data_lookup(kp, "boot_time"); + if (kn) { + switch (kn->data_type) { + case KSTAT_DATA_INT32: + case KSTAT_DATA_UINT32: + bootid_collect(&bin, &kn->value, sizeof(int32_t)); + got_boottime = true; + case KSTAT_DATA_INT64: + case KSTAT_DATA_UINT64: + bootid_collect(&bin, &kn->value, sizeof(int64_t)); + got_boottime = true; + } + } + } + kstat_close(kc); + } + } +#endif /* SunOS / Solaris */ + +#if _XOPEN_SOURCE_EXTENDED && defined(BOOT_TIME) + if (!got_boottime) { + setutxent(); + const struct utmpx id = {.ut_type = BOOT_TIME}; + const struct utmpx *entry = getutxid(&id); + if (entry) { + bootid_collect(&bin, entry, sizeof(*entry)); + got_boottime = true; + while (unlikely((entry = getutxid(&id)) != nullptr)) { + /* have multiple reboot records, assuming we can distinguish next + * bootsession even if RTC is wrong or absent */ + bootid_collect(&bin, entry, sizeof(*entry)); + got_bootseq = true; + } + } + endutxent(); + } +#endif /* _XOPEN_SOURCE_EXTENDED && BOOT_TIME */ + + if (!got_bootseq) { + if (!got_boottime || !MDBX_TRUST_RTC) + goto lack; + +#if defined(_WIN32) || defined(_WIN64) + FILETIME now; + GetSystemTimeAsFileTime(&now); + if (0x1CCCCCC > now.dwHighDateTime) +#else + struct timespec mono, real; + if (clock_gettime(CLOCK_MONOTONIC, &mono) || + clock_gettime(CLOCK_REALTIME, &real) || + /* wrong time, RTC is mad or absent */ + 1555555555l > real.tv_sec || + /* seems no adjustment by RTC/NTP, i.e. a fake time */ + real.tv_sec < mono.tv_sec || 1234567890l > real.tv_sec - mono.tv_sec || + (real.tv_sec - mono.tv_sec) % 900u == 0) +#endif + goto lack; + } + + return bin; +} diff --git a/libs/libmdbx/src/src/osal.h b/libs/libmdbx/src/src/osal.h new file mode 100644 index 0000000000..d9012ce768 --- /dev/null +++ b/libs/libmdbx/src/src/osal.h @@ -0,0 +1,944 @@ +/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ + +/* + * Copyright 2015-2020 Leonid Yuriev + * and other libmdbx authors: please see AUTHORS file. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * . + */ + +#pragma once + +/*----------------------------------------------------------------------------*/ +/* Microsoft compiler generates a lot of warning for self includes... */ + +#ifdef _MSC_VER +#pragma warning(push, 1) +#pragma warning(disable : 4548) /* expression before comma has no effect; \ + expected expression with side - effect */ +#pragma warning(disable : 4530) /* C++ exception handler used, but unwind \ + * semantics are not enabled. Specify /EHsc */ +#pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \ + * mode specified; termination on exception is \ + * not guaranteed. Specify /EHsc */ +#endif /* _MSC_VER (warnings) */ + +#if defined(_WIN32) || defined(_WIN64) +#if !defined(_CRT_SECURE_NO_WARNINGS) +#define _CRT_SECURE_NO_WARNINGS +#endif +#if !defined(_NO_CRT_STDIO_INLINE) && MDBX_BUILD_SHARED_LIBRARY && \ + !defined(MDBX_TOOLS) +#define _NO_CRT_STDIO_INLINE +#endif +#elif !defined(_POSIX_C_SOURCE) +#define _POSIX_C_SOURCE 200809L +#endif /* Windows */ + +#ifdef __cplusplus +extern "C" { +#endif + +/*----------------------------------------------------------------------------*/ +/* C99 includes */ +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +/* C11 stdalign.h */ +#if __has_include() +#include +#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L +#define alignas(N) _Alignas(N) +#elif defined(_MSC_VER) +#define alignas(N) __declspec(align(N)) +#elif __has_attribute(__aligned__) || defined(__GNUC__) +#define alignas(N) __attribute__((__aligned__(N))) +#else +#error "FIXME: Required _alignas() or equivalent." +#endif + +/*----------------------------------------------------------------------------*/ +/* Systems includes */ + +#ifdef __APPLE__ +#include +#endif /* Apple OSX & iOS */ + +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ + defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \ + defined(__APPLE__) || defined(__MACH__) +#include +#include +#include +#include +#if defined(__FreeBSD__) || defined(__DragonFly__) +#include +#elif defined(__OpenBSD__) || defined(__NetBSD__) +#include +#else +#define SYSCTL_LEGACY_NONCONST_MIB +#endif +#ifndef __MACH__ +#include +#endif +#else +#include +#if !(defined(__sun) || defined(__SVR4) || defined(__svr4__) || \ + defined(_WIN32) || defined(_WIN64)) +#include +#endif /* !Solaris */ +#endif /* !xBSD */ + +#if defined(__FreeBSD__) || __has_include() +#include +#endif + +#if defined(__APPLE__) || defined(__MACH__) || __has_include() +#include +#endif /* MacOS */ + +#if defined(__MACH__) +#include +#include +#include +#include +#undef P_DIRTY +#endif + +#if defined(__linux__) || defined(__gnu_linux__) +#include +#include +#include +#endif /* Linux */ + +#ifndef _XOPEN_SOURCE +#define _XOPEN_SOURCE 0 +#endif + +#ifndef _XOPEN_SOURCE_EXTENDED +#define _XOPEN_SOURCE_EXTENDED 0 +#else +#include +#endif /* _XOPEN_SOURCE_EXTENDED */ + +#if defined(__sun) || defined(__SVR4) || defined(__svr4__) +#include +#include +/* On Solaris, it's easier to add a missing prototype rather than find a + * combination of #defines that break nothing. */ +__extern_C key_t ftok(const char *, int); +#endif /* SunOS/Solaris */ + +#if defined(_WIN32) || defined(_WIN64) +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#include +#include +#include +#include +#define HAVE_SYS_STAT_H +#define HAVE_SYS_TYPES_H +typedef HANDLE mdbx_thread_t; +typedef unsigned mdbx_thread_key_t; +#define MDBX_OSAL_SECTION HANDLE +#define MAP_FAILED NULL +#define HIGH_DWORD(v) ((DWORD)((sizeof(v) > 4) ? ((uint64_t)(v) >> 32) : 0)) +#define THREAD_CALL WINAPI +#define THREAD_RESULT DWORD +typedef struct { + HANDLE mutex; + HANDLE event; +} mdbx_condmutex_t; +typedef CRITICAL_SECTION mdbx_fastmutex_t; + +#if MDBX_AVOID_CRT +#ifndef mdbx_malloc +static inline void *mdbx_malloc(size_t bytes) { + return LocalAlloc(LMEM_FIXED, bytes); +} +#endif /* mdbx_malloc */ + +#ifndef mdbx_calloc +static inline void *mdbx_calloc(size_t nelem, size_t size) { + return LocalAlloc(LMEM_FIXED | LMEM_ZEROINIT, nelem * size); +} +#endif /* mdbx_calloc */ + +#ifndef mdbx_realloc +static inline void *mdbx_realloc(void *ptr, size_t bytes) { + return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE); +} +#endif /* mdbx_realloc */ + +#ifndef mdbx_free +#define mdbx_free LocalFree +#endif /* mdbx_free */ +#else +#define mdbx_malloc malloc +#define mdbx_calloc calloc +#define mdbx_realloc realloc +#define mdbx_free free +#define mdbx_strdup _strdup +#endif /* MDBX_AVOID_CRT */ + +#ifndef snprintf +#define snprintf _snprintf /* ntdll */ +#endif + +#ifndef vsnprintf +#define vsnprintf _vsnprintf /* ntdll */ +#endif + +#else /*----------------------------------------------------------------------*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +typedef pthread_t mdbx_thread_t; +typedef pthread_key_t mdbx_thread_key_t; +#define INVALID_HANDLE_VALUE (-1) +#define THREAD_CALL +#define THREAD_RESULT void * +typedef struct { + pthread_mutex_t mutex; + pthread_cond_t cond; +} mdbx_condmutex_t; +typedef pthread_mutex_t mdbx_fastmutex_t; +#define mdbx_malloc malloc +#define mdbx_calloc calloc +#define mdbx_realloc realloc +#define mdbx_free free +#define mdbx_strdup strdup +#endif /* Platform */ + +#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) +/* malloc_usable_size() already provided */ +#elif defined(__APPLE__) +#define malloc_usable_size(ptr) malloc_size(ptr) +#elif defined(_MSC_VER) && !MDBX_AVOID_CRT +#define malloc_usable_size(ptr) _msize(ptr) +#endif /* malloc_usable_size */ + +#ifdef __ANDROID_API__ +#include +#if __ANDROID_API__ >= 21 +#include +#endif +#endif /* Android */ + +/* *INDENT-OFF* */ +/* clang-format off */ +#if defined(HAVE_SYS_STAT_H) || __has_include() +#include +#endif +#if defined(HAVE_SYS_TYPES_H) || __has_include() +#include +#endif +#if defined(HAVE_SYS_FILE_H) || __has_include() +#include +#endif +/* *INDENT-ON* */ +/* clang-format on */ + +#ifndef SSIZE_MAX +#define SSIZE_MAX INTPTR_MAX +#endif + +#if !defined(MADV_DODUMP) && defined(MADV_CORE) +#define MADV_DODUMP MADV_CORE +#endif /* MADV_CORE -> MADV_DODUMP */ + +#if !defined(MADV_DONTDUMP) && defined(MADV_NOCORE) +#define MADV_DONTDUMP MADV_NOCORE +#endif /* MADV_NOCORE -> MADV_DONTDUMP */ + +#if defined(i386) || defined(__386) || defined(__i386) || defined(__i386__) || \ + defined(i486) || defined(__i486) || defined(__i486__) || \ + defined(i586) | defined(__i586) || defined(__i586__) || defined(i686) || \ + defined(__i686) || defined(__i686__) || defined(_M_IX86) || \ + defined(_X86_) || defined(__THW_INTEL__) || defined(__I86__) || \ + defined(__INTEL__) || defined(__x86_64) || defined(__x86_64__) || \ + defined(__amd64__) || defined(__amd64) || defined(_M_X64) || \ + defined(_M_AMD64) || defined(__IA32__) || defined(__INTEL__) +#ifndef __ia32__ +/* LY: define neutral __ia32__ for x86 and x86-64 archs */ +#define __ia32__ 1 +#endif /* __ia32__ */ +#if !defined(__amd64__) && (defined(__x86_64) || defined(__x86_64__) || \ + defined(__amd64) || defined(_M_X64)) +/* LY: define trusty __amd64__ for all AMD64/x86-64 arch */ +#define __amd64__ 1 +#endif /* __amd64__ */ +#endif /* all x86 */ + +#if (-6 & 5) || CHAR_BIT != 8 || UINT_MAX < 0xffffffff || ULONG_MAX % 0xFFFF +#error \ + "Sanity checking failed: Two's complement, reasonably sized integer types" +#endif + +#if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul +#define MDBX_WORDBITS 64 +#else +#define MDBX_WORDBITS 32 +#endif /* MDBX_WORDBITS */ + +/*----------------------------------------------------------------------------*/ +/* Compiler's includes for builtins/intrinsics */ + +#if defined(_MSC_VER) || defined(__INTEL_COMPILER) +#include +#elif __GNUC_PREREQ(4, 4) || defined(__clang__) +#if defined(__ia32__) || defined(__e2k__) +#include +#endif /* __ia32__ */ +#if defined(__ia32__) +#include +#endif /* __ia32__ */ +#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) +#include +#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ + (defined(HP_IA64) || defined(__ia64)) +#include +#elif defined(__IBMC__) && defined(__powerpc) +#include +#elif defined(_AIX) +#include +#include +#elif (defined(__osf__) && defined(__DECC)) || defined(__alpha) +#include +#include +#elif defined(__MWERKS__) +/* CodeWarrior - troubles ? */ +#pragma gcc_extensions +#elif defined(__SNC__) +/* Sony PS3 - troubles ? */ +#elif defined(__hppa__) || defined(__hppa) +#include +#else +#error Unsupported C compiler, please use GNU C 4.4 or newer +#endif /* Compiler */ + +/*----------------------------------------------------------------------------*/ +/* Byteorder */ + +#if !defined(__BYTE_ORDER__) || !defined(__ORDER_LITTLE_ENDIAN__) || \ + !defined(__ORDER_BIG_ENDIAN__) + +/* *INDENT-OFF* */ +/* clang-format off */ +#if defined(__GLIBC__) || defined(__GNU_LIBRARY__) || defined(__ANDROID_API__) || \ + defined(HAVE_ENDIAN_H) || __has_include() +#include +#elif defined(__APPLE__) || defined(__MACH__) || defined(__OpenBSD__) || \ + defined(HAVE_MACHINE_ENDIAN_H) || __has_include() +#include +#elif defined(HAVE_SYS_ISA_DEFS_H) || __has_include() +#include +#elif (defined(HAVE_SYS_TYPES_H) && defined(HAVE_SYS_ENDIAN_H)) || \ + (__has_include() && __has_include()) +#include +#include +#elif defined(__bsdi__) || defined(__DragonFly__) || defined(__FreeBSD__) || \ + defined(__NetBSD__) || \ + defined(HAVE_SYS_PARAM_H) || __has_include() +#include +#endif /* OS */ +/* *INDENT-ON* */ +/* clang-format on */ + +#if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) +#define __ORDER_LITTLE_ENDIAN__ __LITTLE_ENDIAN +#define __ORDER_BIG_ENDIAN__ __BIG_ENDIAN +#define __BYTE_ORDER__ __BYTE_ORDER +#elif defined(_BYTE_ORDER) && defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN) +#define __ORDER_LITTLE_ENDIAN__ _LITTLE_ENDIAN +#define __ORDER_BIG_ENDIAN__ _BIG_ENDIAN +#define __BYTE_ORDER__ _BYTE_ORDER +#else +#define __ORDER_LITTLE_ENDIAN__ 1234 +#define __ORDER_BIG_ENDIAN__ 4321 + +#if defined(__LITTLE_ENDIAN__) || \ + (defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \ + defined(__ARMEL__) || defined(__THUMBEL__) || defined(__AARCH64EL__) || \ + defined(__MIPSEL__) || defined(_MIPSEL) || defined(__MIPSEL) || \ + defined(_M_ARM) || defined(_M_ARM64) || defined(__e2k__) || \ + defined(__elbrus_4c__) || defined(__elbrus_8c__) || defined(__bfin__) || \ + defined(__BFIN__) || defined(__ia64__) || defined(_IA64) || \ + defined(__IA64__) || defined(__ia64) || defined(_M_IA64) || \ + defined(__itanium__) || defined(__ia32__) || defined(__CYGWIN__) || \ + defined(_WIN64) || defined(_WIN32) || defined(__TOS_WIN__) || \ + defined(__WINDOWS__) +#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__ + +#elif defined(__BIG_ENDIAN__) || \ + (defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)) || \ + defined(__ARMEB__) || defined(__THUMBEB__) || defined(__AARCH64EB__) || \ + defined(__MIPSEB__) || defined(_MIPSEB) || defined(__MIPSEB) || \ + defined(__m68k__) || defined(M68000) || defined(__hppa__) || \ + defined(__hppa) || defined(__HPPA__) || defined(__sparc__) || \ + defined(__sparc) || defined(__370__) || defined(__THW_370__) || \ + defined(__s390__) || defined(__s390x__) || defined(__SYSC_ZARCH__) +#define __BYTE_ORDER__ __ORDER_BIG_ENDIAN__ + +#else +#error __BYTE_ORDER__ should be defined. +#endif /* Arch */ + +#endif +#endif /* __BYTE_ORDER__ || __ORDER_LITTLE_ENDIAN__ || __ORDER_BIG_ENDIAN__ */ + +/*----------------------------------------------------------------------------*/ +/* Memory/Compiler barriers, cache coherence */ + +#if __has_include() +#include +#elif defined(__mips) || defined(__mips__) || defined(__mips64) || \ + defined(__mips64__) || defined(_M_MRX000) || defined(_MIPS_) || \ + defined(__MWERKS__) || defined(__sgi) +/* MIPS should have explicit cache control */ +#include +#endif + +static __maybe_unused __inline void mdbx_compiler_barrier(void) { +#if defined(__clang__) || defined(__GNUC__) + __asm__ __volatile__("" ::: "memory"); +#elif defined(_MSC_VER) + _ReadWriteBarrier(); +#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ + __memory_barrier(); + if (type > MDBX_BARRIER_COMPILER) +#if defined(__ia64__) || defined(__ia64) || defined(_M_IA64) + __mf(); +#elif defined(__i386__) || defined(__x86_64__) + _mm_mfence(); +#else +#error "Unknown target for Intel Compiler, please report to us." +#endif +#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) + __compiler_barrier(); +#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ + (defined(HP_IA64) || defined(__ia64)) + _Asm_sched_fence(/* LY: no-arg meaning 'all expect ALU', e.g. 0x3D3D */); +#elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \ + defined(__ppc64__) || defined(__powerpc64__) + __fence(); +#else +#error "Could not guess the kind of compiler, please report to us." +#endif +} + +static __maybe_unused __inline void mdbx_memory_barrier(void) { +#if __has_extension(c_atomic) || __has_extension(cxx_atomic) + __c11_atomic_thread_fence(__ATOMIC_SEQ_CST); +#elif defined(__ATOMIC_SEQ_CST) + __atomic_thread_fence(__ATOMIC_SEQ_CST); +#elif defined(__clang__) || defined(__GNUC__) + __sync_synchronize(); +#elif defined(_MSC_VER) + MemoryBarrier(); +#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ +#if defined(__ia64__) || defined(__ia64) || defined(_M_IA64) + __mf(); +#elif defined(__i386__) || defined(__x86_64__) + _mm_mfence(); +#else +#error "Unknown target for Intel Compiler, please report to us." +#endif +#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) + __machine_rw_barrier(); +#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ + (defined(HP_IA64) || defined(__ia64)) + _Asm_mf(); +#elif defined(_AIX) || defined(__ppc__) || defined(__powerpc__) || \ + defined(__ppc64__) || defined(__powerpc64__) + __lwsync(); +#else +#error "Could not guess the kind of compiler, please report to us." +#endif +} + +/*----------------------------------------------------------------------------*/ +/* libc compatibility stuff */ + +#if (!defined(__GLIBC__) && __GLIBC_PREREQ(2, 1)) && \ + (defined(_GNU_SOURCE) || defined(_BSD_SOURCE)) +#define mdbx_asprintf asprintf +#define mdbx_vasprintf vasprintf +#else +MDBX_INTERNAL_FUNC __printf_args(2, 3) int __maybe_unused + mdbx_asprintf(char **strp, const char *fmt, ...); +MDBX_INTERNAL_FUNC int mdbx_vasprintf(char **strp, const char *fmt, va_list ap); +#endif + +/*----------------------------------------------------------------------------*/ +/* OS abstraction layer stuff */ + +/* max bytes to write in one call */ +#if defined(_WIN32) || defined(_WIN64) +#define MAX_WRITE UINT32_C(0x01000000) +#else +#define MAX_WRITE UINT32_C(0x3fff0000) +#endif + +#if defined(__linux__) || defined(__gnu_linux__) +MDBX_INTERNAL_VAR uint32_t mdbx_linux_kernel_version; +MDBX_INTERNAL_VAR bool + mdbx_RunningOnWSL /* Windows Subsystem for Linux is mad and trouble-full */; +#endif /* Linux */ + +/* Get the size of a memory page for the system. + * This is the basic size that the platform's memory manager uses, and is + * fundamental to the use of memory-mapped files. */ +static __maybe_unused __inline size_t mdbx_syspagesize(void) { +#if defined(_WIN32) || defined(_WIN64) + SYSTEM_INFO si; + GetSystemInfo(&si); + return si.dwPageSize; +#else + return sysconf(_SC_PAGE_SIZE); +#endif +} + +#ifndef mdbx_strdup +LIBMDBX_API char *mdbx_strdup(const char *str); +#endif + +static __maybe_unused __inline int mdbx_get_errno(void) { +#if defined(_WIN32) || defined(_WIN64) + DWORD rc = GetLastError(); +#else + int rc = errno; +#endif + return rc; +} + +#ifndef mdbx_memalign_alloc +MDBX_INTERNAL_FUNC int mdbx_memalign_alloc(size_t alignment, size_t bytes, + void **result); +#endif +#ifndef mdbx_memalign_free +MDBX_INTERNAL_FUNC void mdbx_memalign_free(void *ptr); +#endif + +MDBX_INTERNAL_FUNC int mdbx_condmutex_init(mdbx_condmutex_t *condmutex); +MDBX_INTERNAL_FUNC int mdbx_condmutex_lock(mdbx_condmutex_t *condmutex); +MDBX_INTERNAL_FUNC int mdbx_condmutex_unlock(mdbx_condmutex_t *condmutex); +MDBX_INTERNAL_FUNC int mdbx_condmutex_signal(mdbx_condmutex_t *condmutex); +MDBX_INTERNAL_FUNC int mdbx_condmutex_wait(mdbx_condmutex_t *condmutex); +MDBX_INTERNAL_FUNC int mdbx_condmutex_destroy(mdbx_condmutex_t *condmutex); + +MDBX_INTERNAL_FUNC int mdbx_fastmutex_init(mdbx_fastmutex_t *fastmutex); +MDBX_INTERNAL_FUNC int mdbx_fastmutex_acquire(mdbx_fastmutex_t *fastmutex); +MDBX_INTERNAL_FUNC int mdbx_fastmutex_release(mdbx_fastmutex_t *fastmutex); +MDBX_INTERNAL_FUNC int mdbx_fastmutex_destroy(mdbx_fastmutex_t *fastmutex); + +MDBX_INTERNAL_FUNC int mdbx_pwritev(mdbx_filehandle_t fd, struct iovec *iov, + int iovcnt, uint64_t offset, + size_t expected_written); +MDBX_INTERNAL_FUNC int mdbx_pread(mdbx_filehandle_t fd, void *buf, size_t count, + uint64_t offset); +MDBX_INTERNAL_FUNC int mdbx_pwrite(mdbx_filehandle_t fd, const void *buf, + size_t count, uint64_t offset); +MDBX_INTERNAL_FUNC int mdbx_write(mdbx_filehandle_t fd, const void *buf, + size_t count); + +MDBX_INTERNAL_FUNC int +mdbx_thread_create(mdbx_thread_t *thread, + THREAD_RESULT(THREAD_CALL *start_routine)(void *), + void *arg); +MDBX_INTERNAL_FUNC int mdbx_thread_join(mdbx_thread_t thread); + +enum mdbx_syncmode_bits { + MDBX_SYNC_DATA = 1, + MDBX_SYNC_SIZE = 2, + MDBX_SYNC_IODQ = 4 +}; + +MDBX_INTERNAL_FUNC int mdbx_filesync(mdbx_filehandle_t fd, + const enum mdbx_syncmode_bits mode_bits); +MDBX_INTERNAL_FUNC int mdbx_ftruncate(mdbx_filehandle_t fd, uint64_t length); +MDBX_INTERNAL_FUNC int mdbx_fseek(mdbx_filehandle_t fd, uint64_t pos); +MDBX_INTERNAL_FUNC int mdbx_filesize(mdbx_filehandle_t fd, uint64_t *length); + +enum mdbx_openfile_purpose { + MDBX_OPEN_DXB_READ = 0, + MDBX_OPEN_DXB_LAZY = 1, + MDBX_OPEN_DXB_DSYNC = 2, + MDBX_OPEN_LCK = 3, + MDBX_OPEN_COPY = 4 +}; + +MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose, + const MDBX_env *env, const char *pathname, + mdbx_filehandle_t *fd, + mode_t unix_mode_bits); +MDBX_INTERNAL_FUNC int mdbx_closefile(mdbx_filehandle_t fd); +MDBX_INTERNAL_FUNC int mdbx_removefile(const char *pathname); +MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd); + +typedef struct mdbx_mmap_param { + union { + void *address; + uint8_t *dxb; + struct MDBX_lockinfo *lck; + }; + mdbx_filehandle_t fd; + size_t limit; /* mapping length, but NOT a size of file nor DB */ + size_t current; /* mapped region size, i.e. the size of file and DB */ +#if defined(_WIN32) || defined(_WIN64) + uint64_t filesize /* in-process cache of a file size. */; +#endif +#ifdef MDBX_OSAL_SECTION + MDBX_OSAL_SECTION section; +#endif +} mdbx_mmap_t; + +#define MMAP_OPTION_TRUNCATE 1 +#define MMAP_OPTION_SEMAPHORE 2 +MDBX_INTERNAL_FUNC int mdbx_mmap(const int flags, mdbx_mmap_t *map, + const size_t must, const size_t limit, + const unsigned options); +MDBX_INTERNAL_FUNC int mdbx_munmap(mdbx_mmap_t *map); +MDBX_INTERNAL_FUNC int mdbx_mresize(int flags, mdbx_mmap_t *map, size_t current, + size_t wanna); +#if defined(_WIN32) || defined(_WIN64) +typedef struct { + unsigned limit, count; + HANDLE handles[31]; +} mdbx_handle_array_t; +MDBX_INTERNAL_FUNC int +mdbx_suspend_threads_before_remap(MDBX_env *env, mdbx_handle_array_t **array); +MDBX_INTERNAL_FUNC int +mdbx_resume_threads_after_remap(mdbx_handle_array_t *array); +#endif /* Windows */ +MDBX_INTERNAL_FUNC int mdbx_msync(mdbx_mmap_t *map, size_t offset, + size_t length, int async); +MDBX_INTERNAL_FUNC int mdbx_check_fs_rdonly(mdbx_filehandle_t handle, + const char *pathname, int err); + +static __maybe_unused __inline uint32_t mdbx_getpid(void) { + STATIC_ASSERT(sizeof(mdbx_pid_t) <= sizeof(uint32_t)); +#if defined(_WIN32) || defined(_WIN64) + return GetCurrentProcessId(); +#else + return getpid(); +#endif +} + +static __maybe_unused __inline uintptr_t mdbx_thread_self(void) { + mdbx_tid_t thunk; + STATIC_ASSERT(sizeof(uintptr_t) >= sizeof(thunk)); +#if defined(_WIN32) || defined(_WIN64) + thunk = GetCurrentThreadId(); +#else + thunk = pthread_self(); +#endif + return (uintptr_t)thunk; +} + +MDBX_INTERNAL_FUNC void __maybe_unused mdbx_osal_jitter(bool tiny); +MDBX_INTERNAL_FUNC uint64_t mdbx_osal_monotime(void); +MDBX_INTERNAL_FUNC uint64_t +mdbx_osal_16dot16_to_monotime(uint32_t seconds_16dot16); +MDBX_INTERNAL_FUNC uint32_t mdbx_osal_monotime_to_16dot16(uint64_t monotime); + +typedef union bin128 { + __anonymous_struct_extension__ struct { uint64_t x, y; }; + __anonymous_struct_extension__ struct { uint32_t a, b, c, d; }; +} bin128_t; + +MDBX_INTERNAL_FUNC bin128_t mdbx_osal_bootid(void); +/*----------------------------------------------------------------------------*/ +/* lck stuff */ + +/// \brief Initialization of synchronization primitives linked with MDBX_env +/// instance both in LCK-file and within the current process. +/// \param +/// global_uniqueness_flag = true - denotes that there are no other processes +/// working with DB and LCK-file. Thus the function MUST initialize +/// shared synchronization objects in memory-mapped LCK-file. +/// global_uniqueness_flag = false - denotes that at least one process is +/// already working with DB and LCK-file, including the case when DB +/// has already been opened in the current process. Thus the function +/// MUST NOT initialize shared synchronization objects in memory-mapped +/// LCK-file that are already in use. +/// \return Error code or zero on success. +MDBX_INTERNAL_FUNC int mdbx_lck_init(MDBX_env *env, + MDBX_env *inprocess_neighbor, + int global_uniqueness_flag); + +/// \brief Disconnects from shared interprocess objects and destructs +/// synchronization objects linked with MDBX_env instance +/// within the current process. +/// \param +/// inprocess_neighbor = NULL - if the current process does not have other +/// instances of MDBX_env linked with the DB being closed. +/// Thus the function MUST check for other processes working with DB or +/// LCK-file, and keep or destroy shared synchronization objects in +/// memory-mapped LCK-file depending on the result. +/// inprocess_neighbor = not-NULL - pointer to another instance of MDBX_env +/// (anyone of there is several) working with DB or LCK-file within the +/// current process. Thus the function MUST NOT try to acquire exclusive +/// lock and/or try to destruct shared synchronization objects linked with +/// DB or LCK-file. Moreover, the implementation MUST ensure correct work +/// of other instances of MDBX_env within the current process, e.g. +/// restore POSIX-fcntl locks after the closing of file descriptors. +/// \return Error code (MDBX_PANIC) or zero on success. +MDBX_INTERNAL_FUNC int mdbx_lck_destroy(MDBX_env *env, + MDBX_env *inprocess_neighbor); + +/// \brief Connects to shared interprocess locking objects and tries to acquire +/// the maximum lock level (shared if exclusive is not available) +/// Depending on implementation or/and platform (Windows) this function may +/// acquire the non-OS super-level lock (e.g. for shared synchronization +/// objects initialization), which will be downgraded to OS-exclusive or +/// shared via explicit calling of mdbx_lck_downgrade(). +/// \return +/// MDBX_RESULT_TRUE (-1) - if an exclusive lock was acquired and thus +/// the current process is the first and only after the last use of DB. +/// MDBX_RESULT_FALSE (0) - if a shared lock was acquired and thus +/// DB has already been opened and now is used by other processes. +/// Otherwise (not 0 and not -1) - error code. +MDBX_INTERNAL_FUNC int mdbx_lck_seize(MDBX_env *env); + +/// \brief Downgrades the level of initially acquired lock to +/// operational level specified by agrument. The reson for such downgrade: +/// - unblocking of other processes that are waiting for access, i.e. +/// if (env->me_flags & MDBX_EXCLUSIVE) != 0, then other processes +/// should be made aware that access is unavailable rather than +/// wait for it. +/// - freeing locks that interfere file operation (expecially for Windows) +/// (env->me_flags & MDBX_EXCLUSIVE) == 0 - downgrade to shared lock. +/// (env->me_flags & MDBX_EXCLUSIVE) != 0 - downgrade to exclusive +/// operational lock. +/// \return Error code or zero on success +MDBX_INTERNAL_FUNC int mdbx_lck_downgrade(MDBX_env *env); + +/// \brief Locks LCK-file or/and table of readers for (de)registering. +/// \return Error code or zero on success +MDBX_INTERNAL_FUNC int mdbx_rdt_lock(MDBX_env *env); + +/// \brief Unlocks LCK-file or/and table of readers after (de)registering. +MDBX_INTERNAL_FUNC void mdbx_rdt_unlock(MDBX_env *env); + +/// \brief Acquires lock for DB change (on writing transaction start) +/// Reading transactions will not be blocked. +/// Declared as LIBMDBX_API because it is used in mdbx_chk. +/// \return Error code or zero on success +LIBMDBX_API int mdbx_txn_lock(MDBX_env *env, bool dont_wait); + +/// \brief Releases lock once DB changes is made (after writing transaction +/// has finished). +/// Declared as LIBMDBX_API because it is used in mdbx_chk. +LIBMDBX_API void mdbx_txn_unlock(MDBX_env *env); + +/// \brief Sets alive-flag of reader presence (indicative lock) for PID of +/// the current process. The function does no more than needed for +/// the correct working of mdbx_rpid_check() in other processes. +/// \return Error code or zero on success +MDBX_INTERNAL_FUNC int mdbx_rpid_set(MDBX_env *env); + +/// \brief Resets alive-flag of reader presence (indicative lock) +/// for PID of the current process. The function does no more than needed +/// for the correct working of mdbx_rpid_check() in other processes. +/// \return Error code or zero on success +MDBX_INTERNAL_FUNC int mdbx_rpid_clear(MDBX_env *env); + +/// \brief Checks for reading process status with the given pid with help of +/// alive-flag of presence (indicative lock) or using another way. +/// \return +/// MDBX_RESULT_TRUE (-1) - if the reader process with the given PID is alive +/// and working with DB (indicative lock is present). +/// MDBX_RESULT_FALSE (0) - if the reader process with the given PID is absent +/// or not working with DB (indicative lock is not present). +/// Otherwise (not 0 and not -1) - error code. +MDBX_INTERNAL_FUNC int mdbx_rpid_check(MDBX_env *env, uint32_t pid); + +#if defined(_WIN32) || defined(_WIN64) + +typedef union MDBX_srwlock { + struct { + long volatile readerCount; + long volatile writerCount; + }; + RTL_SRWLOCK native; +} MDBX_srwlock; + +typedef void(WINAPI *MDBX_srwlock_function)(MDBX_srwlock *); +MDBX_INTERNAL_VAR MDBX_srwlock_function mdbx_srwlock_Init, + mdbx_srwlock_AcquireShared, mdbx_srwlock_ReleaseShared, + mdbx_srwlock_AcquireExclusive, mdbx_srwlock_ReleaseExclusive; + +typedef BOOL(WINAPI *MDBX_GetFileInformationByHandleEx)( + _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass, + _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize); +MDBX_INTERNAL_VAR MDBX_GetFileInformationByHandleEx + mdbx_GetFileInformationByHandleEx; + +typedef BOOL(WINAPI *MDBX_GetVolumeInformationByHandleW)( + _In_ HANDLE hFile, _Out_opt_ LPWSTR lpVolumeNameBuffer, + _In_ DWORD nVolumeNameSize, _Out_opt_ LPDWORD lpVolumeSerialNumber, + _Out_opt_ LPDWORD lpMaximumComponentLength, + _Out_opt_ LPDWORD lpFileSystemFlags, + _Out_opt_ LPWSTR lpFileSystemNameBuffer, _In_ DWORD nFileSystemNameSize); +MDBX_INTERNAL_VAR MDBX_GetVolumeInformationByHandleW + mdbx_GetVolumeInformationByHandleW; + +typedef DWORD(WINAPI *MDBX_GetFinalPathNameByHandleW)(_In_ HANDLE hFile, + _Out_ LPWSTR lpszFilePath, + _In_ DWORD cchFilePath, + _In_ DWORD dwFlags); +MDBX_INTERNAL_VAR MDBX_GetFinalPathNameByHandleW mdbx_GetFinalPathNameByHandleW; + +typedef BOOL(WINAPI *MDBX_SetFileInformationByHandle)( + _In_ HANDLE hFile, _In_ FILE_INFO_BY_HANDLE_CLASS FileInformationClass, + _Out_ LPVOID lpFileInformation, _In_ DWORD dwBufferSize); +MDBX_INTERNAL_VAR MDBX_SetFileInformationByHandle + mdbx_SetFileInformationByHandle; + +typedef NTSTATUS(NTAPI *MDBX_NtFsControlFile)( + IN HANDLE FileHandle, IN OUT HANDLE Event, + IN OUT PVOID /* PIO_APC_ROUTINE */ ApcRoutine, IN OUT PVOID ApcContext, + OUT PIO_STATUS_BLOCK IoStatusBlock, IN ULONG FsControlCode, + IN OUT PVOID InputBuffer, IN ULONG InputBufferLength, + OUT OPTIONAL PVOID OutputBuffer, IN ULONG OutputBufferLength); +MDBX_INTERNAL_VAR MDBX_NtFsControlFile mdbx_NtFsControlFile; + +typedef uint64_t(WINAPI *MDBX_GetTickCount64)(void); +MDBX_INTERNAL_VAR MDBX_GetTickCount64 mdbx_GetTickCount64; + +#if !defined(_WIN32_WINNT_WIN8) || _WIN32_WINNT < _WIN32_WINNT_WIN8 +typedef struct _WIN32_MEMORY_RANGE_ENTRY { + PVOID VirtualAddress; + SIZE_T NumberOfBytes; +} WIN32_MEMORY_RANGE_ENTRY, *PWIN32_MEMORY_RANGE_ENTRY; +#endif /* Windows 8.x */ + +typedef BOOL(WINAPI *MDBX_PrefetchVirtualMemory)( + HANDLE hProcess, ULONG_PTR NumberOfEntries, + PWIN32_MEMORY_RANGE_ENTRY VirtualAddresses, ULONG Flags); +MDBX_INTERNAL_VAR MDBX_PrefetchVirtualMemory mdbx_PrefetchVirtualMemory; + +#if 0 /* LY: unused for now */ +#if !defined(_WIN32_WINNT_WIN81) || _WIN32_WINNT < _WIN32_WINNT_WIN81 +typedef enum OFFER_PRIORITY { + VmOfferPriorityVeryLow = 1, + VmOfferPriorityLow, + VmOfferPriorityBelowNormal, + VmOfferPriorityNormal +} OFFER_PRIORITY; +#endif /* Windows 8.1 */ + +typedef DWORD(WINAPI *MDBX_DiscardVirtualMemory)(PVOID VirtualAddress, + SIZE_T Size); +MDBX_INTERNAL_VAR MDBX_DiscardVirtualMemory mdbx_DiscardVirtualMemory; + +typedef DWORD(WINAPI *MDBX_ReclaimVirtualMemory)(PVOID VirtualAddress, + SIZE_T Size); +MDBX_INTERNAL_VAR MDBX_ReclaimVirtualMemory mdbx_ReclaimVirtualMemory; + +typedef DWORD(WINAPI *MDBX_OfferVirtualMemory( + PVOID VirtualAddress, + SIZE_T Size, + OFFER_PRIORITY Priority +); +MDBX_INTERNAL_VAR MDBX_OfferVirtualMemory mdbx_OfferVirtualMemory; +#endif /* unused for now */ + +typedef enum _SECTION_INHERIT { ViewShare = 1, ViewUnmap = 2 } SECTION_INHERIT; + +typedef NTSTATUS(NTAPI *MDBX_NtExtendSection)(IN HANDLE SectionHandle, + IN PLARGE_INTEGER NewSectionSize); +MDBX_INTERNAL_VAR MDBX_NtExtendSection mdbx_NtExtendSection; + +static __inline bool mdbx_RunningUnderWine(void) { + return !mdbx_NtExtendSection; +} + +#endif /* Windows */ + +/*----------------------------------------------------------------------------*/ +/* Atomics */ + +#if !defined(__cplusplus) && (__STDC_VERSION__ >= 201112L) && \ + !defined(__STDC_NO_ATOMICS__) && \ + (__GNUC_PREREQ(4, 9) || __CLANG_PREREQ(3, 8) || \ + !(defined(__GNUC__) || defined(__clang__))) +#include +#elif defined(__GNUC__) || defined(__clang__) +/* LY: nothing required */ +#elif defined(_MSC_VER) +#pragma warning(disable : 4163) /* 'xyz': not available as an intrinsic */ +#pragma warning(disable : 4133) /* 'function': incompatible types - from \ + 'size_t' to 'LONGLONG' */ +#pragma warning(disable : 4244) /* 'return': conversion from 'LONGLONG' to \ + 'std::size_t', possible loss of data */ +#pragma warning(disable : 4267) /* 'function': conversion from 'size_t' to \ + 'long', possible loss of data */ +#pragma intrinsic(_InterlockedExchangeAdd, _InterlockedCompareExchange) +#pragma intrinsic(_InterlockedExchangeAdd64, _InterlockedCompareExchange64) +#elif defined(__APPLE__) +#include +#else +#error FIXME atomic-ops +#endif + +/*----------------------------------------------------------------------------*/ + +#if defined(_MSC_VER) && _MSC_VER >= 1900 +/* LY: MSVC 2015/2017/2019 has buggy/inconsistent PRIuPTR/PRIxPTR macros + * for internal format-args checker. */ +#undef PRIuPTR +#undef PRIiPTR +#undef PRIdPTR +#undef PRIxPTR +#define PRIuPTR "Iu" +#define PRIiPTR "Ii" +#define PRIdPTR "Id" +#define PRIxPTR "Ix" +#define PRIuSIZE "zu" +#define PRIiSIZE "zi" +#define PRIdSIZE "zd" +#define PRIxSIZE "zx" +#endif /* fix PRI*PTR for _MSC_VER */ + +#ifndef PRIuSIZE +#define PRIuSIZE PRIuPTR +#define PRIiSIZE PRIiPTR +#define PRIdSIZE PRIdPTR +#define PRIxSIZE PRIxPTR +#endif /* PRI*SIZE macros for MSVC */ + +#ifdef __cplusplus +} +#endif + +#ifdef _MSC_VER +#pragma warning(pop) +#endif diff --git a/libs/libmdbx/src/src/tools/CMakeLists.txt b/libs/libmdbx/src/src/tools/CMakeLists.txt deleted file mode 100644 index 99167fa86f..0000000000 --- a/libs/libmdbx/src/src/tools/CMakeLists.txt +++ /dev/null @@ -1,60 +0,0 @@ -set(MDBX_TOOLS mdbx_chk mdbx_copy mdbx_dump mdbx_load mdbx_stat) - -# use, i.e. don't skip the full RPATH for the build tree -set(CMAKE_SKIP_BUILD_RPATH FALSE) - -# when building, don't use the install RPATH already (but later on when installing) -set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE) - -# add the automatically determined parts of the RPATH -# which point to directories outside the build tree to the install RPATH -set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE) - -# the RPATH to be used when installing, but only if it's not a system directory -list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir) -if(isSystemDir EQUAL -1) - if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin") - set(CMAKE_INSTALL_RPATH "@executable_path/../lib") - else() - set(CMAKE_INSTALL_RPATH "\$ORIGIN/../lib") - endif() -endif() - -foreach(TOOL ${MDBX_TOOLS}) - if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") - add_executable(${TOOL} ${TOOL}.c wingetopt.c wingetopt.h) - else() - add_executable(${TOOL} ${TOOL}.c) - endif() - - target_link_libraries(${TOOL} mdbx ${CMAKE_THREAD_LIBS_INIT}) - set_target_properties(${TOOL} PROPERTIES - C_STANDARD ${MDBX_C_STANDARD} C_STANDARD_REQUIRED ON - INTERPROCEDURAL_OPTIMIZATION $) -endforeach() - -if(LIB_MATH) - target_link_libraries(mdbx_chk ${LIB_MATH}) - target_link_libraries(mdbx_stat ${LIB_MATH}) -endif() - -install( - TARGETS - mdbx_chk - mdbx_stat - mdbx_copy - mdbx_dump - mdbx_load - RUNTIME - DESTINATION bin - COMPONENT runtime) - -install( - FILES - ../man1/mdbx_chk.1 - ../man1/mdbx_stat.1 - ../man1/mdbx_copy.1 - ../man1/mdbx_dump.1 - ../man1/mdbx_load.1 - DESTINATION man/man1 - COMPONENT doc) diff --git a/libs/libmdbx/src/src/tools/mdbx_chk.c b/libs/libmdbx/src/src/tools/mdbx_chk.c deleted file mode 100644 index e5dd539af5..0000000000 --- a/libs/libmdbx/src/src/tools/mdbx_chk.c +++ /dev/null @@ -1,1466 +0,0 @@ -/* mdbx_chk.c - memory-mapped database check tool */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . */ - -#ifdef _MSC_VER -#if _MSC_VER > 1800 -#pragma warning(disable : 4464) /* relative include path contains '..' */ -#endif -#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ -#endif /* _MSC_VER (warnings) */ - -#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ -#include "../elements/internals.h" - -typedef struct flagbit { - int bit; - const char *name; -} flagbit; - -const flagbit dbflags[] = {{MDBX_DUPSORT, "dupsort"}, - {MDBX_INTEGERKEY, "integerkey"}, - {MDBX_REVERSEKEY, "reversekey"}, - {MDBX_DUPFIXED, "dupfixed"}, - {MDBX_REVERSEDUP, "reversedup"}, - {MDBX_INTEGERDUP, "integerdup"}, - {0, NULL}}; - -#if defined(_WIN32) || defined(_WIN64) -#include "wingetopt.h" - -static volatile BOOL user_break; -static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { - (void)dwCtrlType; - user_break = 1; - return true; -} - -#else /* WINDOWS */ - -static volatile sig_atomic_t user_break; -static void signal_handler(int sig) { - (void)sig; - user_break = 1; -} - -#endif /* !WINDOWS */ - -#define EXIT_INTERRUPTED (EXIT_FAILURE + 4) -#define EXIT_FAILURE_SYS (EXIT_FAILURE + 3) -#define EXIT_FAILURE_MDB (EXIT_FAILURE + 2) -#define EXIT_FAILURE_CHECK_MAJOR (EXIT_FAILURE + 1) -#define EXIT_FAILURE_CHECK_MINOR EXIT_FAILURE - -typedef struct { - const char *name; - struct { - uint64_t branch, large_count, large_volume, leaf; - uint64_t subleaf_dupsort, leaf_dupfixed, subleaf_dupfixed; - uint64_t total, empty, other; - } pages; - uint64_t payload_bytes; - uint64_t lost_bytes; -} walk_dbi_t; - -struct { - short *pagemap; - uint64_t total_payload_bytes; - uint64_t pgcount; - walk_dbi_t dbi[MAX_DBI + CORE_DBS + /* account pseudo-entry for meta */ 1]; -} walk; - -#define dbi_free walk.dbi[FREE_DBI] -#define dbi_main walk.dbi[MAIN_DBI] -#define dbi_meta walk.dbi[CORE_DBS] - -int envflags = MDBX_RDONLY | MDBX_EXCLUSIVE; -MDBX_env *env; -MDBX_txn *txn; -MDBX_envinfo envinfo; -MDBX_stat envstat; -size_t userdb_count, skipped_subdb; -uint64_t total_unused_bytes, reclaimable_pages, gc_pages, alloc_pages, - unused_pages, backed_pages; -unsigned verbose; -bool ignore_wrong_order, quiet, dont_traversal; -const char *only_subdb; - -struct problem { - struct problem *pr_next; - size_t count; - const char *caption; -}; - -struct problem *problems_list; -uint64_t total_problems; - -static void __printf_args(1, 2) print(const char *msg, ...) { - if (!quiet) { - va_list args; - - fflush(stderr); - va_start(args, msg); - vfprintf(stdout, msg, args); - va_end(args); - } -} - -static void __printf_args(1, 2) error(const char *msg, ...) { - total_problems++; - - if (!quiet) { - va_list args; - - fflush(NULL); - va_start(args, msg); - fputs(" ! ", stderr); - vfprintf(stderr, msg, args); - va_end(args); - fflush(NULL); - } -} - -static int check_user_break(void) { - switch (user_break) { - case 0: - return MDBX_SUCCESS; - case 1: - print(" - interrupted by signal\n"); - fflush(NULL); - user_break = 2; - } - return MDBX_EINTR; -} - -static void pagemap_cleanup(void) { - for (size_t i = CORE_DBS + /* account pseudo-entry for meta */ 1; - i < ARRAY_LENGTH(walk.dbi); ++i) { - if (walk.dbi[i].name) { - mdbx_free((void *)walk.dbi[i].name); - walk.dbi[i].name = NULL; - } - } - - mdbx_free(walk.pagemap); - walk.pagemap = NULL; -} - -static walk_dbi_t *pagemap_lookup_dbi(const char *dbi_name, bool silent) { - static walk_dbi_t *last; - - if (dbi_name == MDBX_PGWALK_MAIN) - return &dbi_main; - if (dbi_name == MDBX_PGWALK_GC) - return &dbi_free; - if (dbi_name == MDBX_PGWALK_META) - return &dbi_meta; - - if (last && strcmp(last->name, dbi_name) == 0) - return last; - - walk_dbi_t *dbi = walk.dbi + CORE_DBS + /* account pseudo-entry for meta */ 1; - for (; dbi < ARRAY_END(walk.dbi) && dbi->name; ++dbi) { - if (strcmp(dbi->name, dbi_name) == 0) - return last = dbi; - } - - if (verbose > 0 && !silent) { - print(" - found '%s' area\n", dbi_name); - fflush(NULL); - } - - if (dbi == ARRAY_END(walk.dbi)) - return NULL; - - dbi->name = mdbx_strdup(dbi_name); - return last = dbi; -} - -static void __printf_args(4, 5) - - problem_add(const char *object, uint64_t entry_number, const char *msg, - const char *extra, ...) { - total_problems++; - - if (!quiet) { - int need_fflush = 0; - struct problem *p; - - for (p = problems_list; p; p = p->pr_next) - if (p->caption == msg) - break; - - if (!p) { - p = mdbx_calloc(1, sizeof(*p)); - p->caption = msg; - p->pr_next = problems_list; - problems_list = p; - need_fflush = 1; - } - - p->count++; - if (verbose > 1) { - print(" %s #%" PRIu64 ": %s", object, entry_number, msg); - if (extra) { - va_list args; - printf(" ("); - va_start(args, extra); - vfprintf(stdout, extra, args); - va_end(args); - printf(")"); - } - printf("\n"); - if (need_fflush) - fflush(NULL); - } - } -} - -static struct problem *problems_push(void) { - struct problem *p = problems_list; - problems_list = NULL; - return p; -} - -static size_t problems_pop(struct problem *list) { - size_t count = 0; - - if (problems_list) { - int i; - - print(" - problems: "); - for (i = 0; problems_list; ++i) { - struct problem *p = problems_list->pr_next; - count += problems_list->count; - print("%s%s (%" PRIuPTR ")", i ? ", " : "", problems_list->caption, - problems_list->count); - mdbx_free(problems_list); - problems_list = p; - } - print("\n"); - fflush(NULL); - } - - problems_list = list; - return count; -} - -static int pgvisitor(const uint64_t pgno, const unsigned pgnumber, - void *const ctx, const int deep, - const char *const dbi_name_or_tag, const size_t page_size, - const MDBX_page_type_t pagetype, const size_t nentries, - const size_t payload_bytes, const size_t header_bytes, - const size_t unused_bytes) { - (void)ctx; - if (deep > 42) { - problem_add("deep", deep, "too large", nullptr); - return MDBX_CORRUPTED /* avoid infinite loop/recursion */; - } - - if (pagetype == MDBX_page_void) - return MDBX_SUCCESS; - - walk_dbi_t *dbi = pagemap_lookup_dbi(dbi_name_or_tag, false); - if (!dbi) - return MDBX_ENOMEM; - - const size_t page_bytes = payload_bytes + header_bytes + unused_bytes; - walk.pgcount += pgnumber; - - const char *pagetype_caption; - bool branch = false; - switch (pagetype) { - default: - problem_add("page", pgno, "unknown page-type", "type %u, deep %i", - (unsigned)pagetype, deep); - pagetype_caption = "unknown"; - dbi->pages.other += pgnumber; - break; - case MDBX_page_meta: - pagetype_caption = "meta"; - dbi->pages.other += pgnumber; - break; - case MDBX_page_large: - pagetype_caption = "large"; - dbi->pages.large_volume += pgnumber; - dbi->pages.large_count += 1; - break; - case MDBX_page_branch: - pagetype_caption = "branch"; - dbi->pages.branch += pgnumber; - branch = true; - break; - case MDBX_page_leaf: - pagetype_caption = "leaf"; - dbi->pages.leaf += pgnumber; - break; - case MDBX_page_dupfixed_leaf: - pagetype_caption = "leaf-dupfixed"; - dbi->pages.leaf_dupfixed += pgnumber; - break; - case MDBX_subpage_leaf: - pagetype_caption = "subleaf-dupsort"; - dbi->pages.subleaf_dupsort += 1; - break; - case MDBX_subpage_dupfixed_leaf: - pagetype_caption = "subleaf-dupfixed"; - dbi->pages.subleaf_dupfixed += 1; - break; - } - - if (pgnumber) { - if (verbose > 3 && (!only_subdb || strcmp(only_subdb, dbi->name) == 0)) { - if (pgnumber == 1) - print(" %s-page %" PRIu64, pagetype_caption, pgno); - else - print(" %s-span %" PRIu64 "[%u]", pagetype_caption, pgno, pgnumber); - print(" of %s: header %" PRIiPTR ", payload %" PRIiPTR - ", unused %" PRIiPTR ", deep %i\n", - dbi->name, header_bytes, payload_bytes, unused_bytes, deep); - } - - bool already_used = false; - for (unsigned n = 0; n < pgnumber; ++n) { - uint64_t spanpgno = pgno + n; - if (spanpgno >= alloc_pages) - problem_add("page", spanpgno, "wrong page-no", - "%s-page: %" PRIu64 " > %" PRIu64 ", deep %i", - pagetype_caption, spanpgno, alloc_pages, deep); - else if (walk.pagemap[spanpgno]) { - walk_dbi_t *coll_dbi = &walk.dbi[walk.pagemap[spanpgno] - 1]; - problem_add("page", spanpgno, - (branch && coll_dbi == dbi) ? "loop" : "already used", - "%s-page: by %s, deep %i", pagetype_caption, coll_dbi->name, - deep); - already_used = true; - } else { - walk.pagemap[spanpgno] = (short)(dbi - walk.dbi + 1); - dbi->pages.total += 1; - } - } - - if (already_used) - return branch ? MDBX_RESULT_TRUE /* avoid infinite loop/recursion */ - : MDBX_SUCCESS; - } - - if (unused_bytes > page_size) - problem_add("page", pgno, "illegal unused-bytes", - "%s-page: %u < %" PRIuPTR " < %u", pagetype_caption, 0, - unused_bytes, envstat.ms_psize); - - if (header_bytes < (int)sizeof(long) || - (size_t)header_bytes >= envstat.ms_psize - sizeof(long)) - problem_add("page", pgno, "illegal header-length", - "%s-page: %" PRIuPTR " < %" PRIuPTR " < %" PRIuPTR, - pagetype_caption, sizeof(long), header_bytes, - envstat.ms_psize - sizeof(long)); - if (payload_bytes < 1) { - if (nentries > 1) { - problem_add("page", pgno, "zero size-of-entry", - "%s-page: payload %" PRIuPTR " bytes, %" PRIuPTR " entries", - pagetype_caption, payload_bytes, nentries); - /* if ((size_t)header_bytes + unused_bytes < page_size) { - // LY: hush a misuse error - page_bytes = page_size; - } */ - } else { - problem_add("page", pgno, "empty", - "%s-page: payload %" PRIuPTR " bytes, %" PRIuPTR - " entries, deep %i", - pagetype_caption, payload_bytes, nentries, deep); - dbi->pages.empty += 1; - } - } - - if (pgnumber) { - if (page_bytes != page_size) { - problem_add("page", pgno, "misused", - "%s-page: %" PRIuPTR " != %" PRIuPTR " (%" PRIuPTR - "h + %" PRIuPTR "p + %" PRIuPTR "u), deep %i", - pagetype_caption, page_size, page_bytes, header_bytes, - payload_bytes, unused_bytes, deep); - if (page_size > page_bytes) - dbi->lost_bytes += page_size - page_bytes; - } else { - dbi->payload_bytes += payload_bytes + header_bytes; - walk.total_payload_bytes += payload_bytes + header_bytes; - } - } - - return check_user_break(); -} - -typedef int(visitor)(const uint64_t record_number, const MDBX_val *key, - const MDBX_val *data); -static int process_db(MDBX_dbi dbi_handle, char *dbi_name, visitor *handler, - bool silent); - -static int handle_userdb(const uint64_t record_number, const MDBX_val *key, - const MDBX_val *data) { - (void)record_number; - (void)key; - (void)data; - return check_user_break(); -} - -static int handle_freedb(const uint64_t record_number, const MDBX_val *key, - const MDBX_val *data) { - char *bad = ""; - pgno_t *iptr = data->iov_base; - - if (key->iov_len != sizeof(txnid_t)) - problem_add("entry", record_number, "wrong txn-id size", - "key-size %" PRIiPTR, key->iov_len); - else { - txnid_t txnid; - memcpy(&txnid, key->iov_base, sizeof(txnid)); - if (txnid < 1 || txnid > envinfo.mi_recent_txnid) - problem_add("entry", record_number, "wrong txn-id", "%" PRIaTXN, txnid); - else { - if (data->iov_len < sizeof(pgno_t) || data->iov_len % sizeof(pgno_t)) - problem_add("entry", txnid, "wrong idl size", "%" PRIuPTR, - data->iov_len); - size_t number = (data->iov_len >= sizeof(pgno_t)) ? *iptr++ : 0; - if (number < 1 || number > MDBX_PNL_MAX) - problem_add("entry", txnid, "wrong idl length", "%" PRIuPTR, number); - else if ((number + 1) * sizeof(pgno_t) > data->iov_len) { - problem_add("entry", txnid, "trimmed idl", - "%" PRIuSIZE " > %" PRIuSIZE " (corruption)", - (number + 1) * sizeof(pgno_t), data->iov_len); - number = data->iov_len / sizeof(pgno_t) - 1; - } else if (data->iov_len - (number + 1) * sizeof(pgno_t) >= - /* LY: allow gap upto one page. it is ok - * and better than shink-and-retry inside mdbx_update_gc() */ - envstat.ms_psize) - problem_add("entry", txnid, "extra idl space", - "%" PRIuSIZE " < %" PRIuSIZE " (minor, not a trouble)", - (number + 1) * sizeof(pgno_t), data->iov_len); - - gc_pages += number; - if (envinfo.mi_latter_reader_txnid > txnid) - reclaimable_pages += number; - - pgno_t prev = MDBX_PNL_ASCENDING ? NUM_METAS - 1 : txn->mt_next_pgno; - pgno_t span = 1; - for (unsigned i = 0; i < number; ++i) { - if (check_user_break()) - return MDBX_EINTR; - const pgno_t pgno = iptr[i]; - if (pgno < NUM_METAS) - problem_add("entry", txnid, "wrong idl entry", - "pgno %" PRIaPGNO " < meta-pages %u", pgno, NUM_METAS); - else if (pgno >= backed_pages) - problem_add("entry", txnid, "wrong idl entry", - "pgno %" PRIaPGNO " > backed-pages %" PRIu64, pgno, - backed_pages); - else if (pgno >= alloc_pages) - problem_add("entry", txnid, "wrong idl entry", - "pgno %" PRIaPGNO " > alloc-pages %" PRIu64, pgno, - alloc_pages - 1); - else { - if (MDBX_PNL_DISORDERED(prev, pgno)) { - bad = " [bad sequence]"; - problem_add("entry", txnid, "bad sequence", - "%" PRIaPGNO " %c [%u].%" PRIaPGNO, prev, - (prev == pgno) ? '=' : (MDBX_PNL_ASCENDING ? '>' : '<'), - i, pgno); - } - if (walk.pagemap) { - int idx = walk.pagemap[pgno]; - if (idx == 0) - walk.pagemap[pgno] = -1; - else if (idx > 0) - problem_add("page", pgno, "already used", "by %s", - walk.dbi[idx - 1].name); - else - problem_add("page", pgno, "already listed in GC", nullptr); - } - } - prev = pgno; - while (i + span < number && - iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pgno, span) - : pgno_sub(pgno, span))) - ++span; - } - if (verbose > 3 && !only_subdb) { - print(" transaction %" PRIaTXN ", %" PRIuPTR - " pages, maxspan %" PRIaPGNO "%s\n", - txnid, number, span, bad); - if (verbose > 4) { - for (unsigned i = 0; i < number; i += span) { - const pgno_t pgno = iptr[i]; - for (span = 1; - i + span < number && - iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pgno, span) - : pgno_sub(pgno, span)); - ++span) - ; - if (span > 1) { - print(" %9" PRIaPGNO "[%" PRIaPGNO "]\n", pgno, span); - } else - print(" %9" PRIaPGNO "\n", pgno); - } - } - } - } - } - - return check_user_break(); -} - -static int handle_maindb(const uint64_t record_number, const MDBX_val *key, - const MDBX_val *data) { - char *name; - int rc; - size_t i; - - name = key->iov_base; - for (i = 0; i < key->iov_len; ++i) { - if (name[i] < ' ') - return handle_userdb(record_number, key, data); - } - - name = mdbx_malloc(key->iov_len + 1); - memcpy(name, key->iov_base, key->iov_len); - name[key->iov_len] = '\0'; - userdb_count++; - - rc = process_db(~0u, name, handle_userdb, false); - mdbx_free(name); - if (rc != MDBX_INCOMPATIBLE) - return rc; - - return handle_userdb(record_number, key, data); -} - -static int process_db(MDBX_dbi dbi_handle, char *dbi_name, visitor *handler, - bool silent) { - MDBX_cursor *mc; - MDBX_stat ms; - MDBX_val key, data; - MDBX_val prev_key, prev_data; - unsigned flags; - int rc, i; - struct problem *saved_list; - uint64_t problems_count; - - uint64_t record_count = 0, dups = 0; - uint64_t key_bytes = 0, data_bytes = 0; - - if (dbi_handle == ~0u) { - rc = mdbx_dbi_open(txn, dbi_name, 0, &dbi_handle); - if (rc) { - if (!dbi_name || - rc != - MDBX_INCOMPATIBLE) /* LY: mainDB's record is not a user's DB. */ { - error("mdbx_open '%s' failed, error %d %s\n", - dbi_name ? dbi_name : "main", rc, mdbx_strerror(rc)); - } - return rc; - } - } - - if (dbi_handle >= CORE_DBS && dbi_name && only_subdb && - strcmp(only_subdb, dbi_name) != 0) { - if (verbose) { - print("Skip processing '%s'...\n", dbi_name); - fflush(NULL); - } - skipped_subdb++; - return MDBX_SUCCESS; - } - - if (!silent && verbose) { - print("Processing '%s'...\n", dbi_name ? dbi_name : "@MAIN"); - fflush(NULL); - } - - rc = mdbx_dbi_flags(txn, dbi_handle, &flags); - if (rc) { - error("mdbx_dbi_flags failed, error %d %s\n", rc, mdbx_strerror(rc)); - return rc; - } - - rc = mdbx_dbi_stat(txn, dbi_handle, &ms, sizeof(ms)); - if (rc) { - error("mdbx_dbi_stat failed, error %d %s\n", rc, mdbx_strerror(rc)); - return rc; - } - - if (!silent && verbose) { - print(" - dbi-id %d, flags:", dbi_handle); - if (!flags) - print(" none"); - else { - for (i = 0; dbflags[i].bit; i++) - if (flags & dbflags[i].bit) - print(" %s", dbflags[i].name); - } - print(" (0x%02X)\n", flags); - if (verbose > 1) { - print(" - page size %u, entries %" PRIu64 "\n", ms.ms_psize, - ms.ms_entries); - print(" - b-tree depth %u, pages: branch %" PRIu64 ", leaf %" PRIu64 - ", overflow %" PRIu64 "\n", - ms.ms_depth, ms.ms_branch_pages, ms.ms_leaf_pages, - ms.ms_overflow_pages); - } - } - - walk_dbi_t *dbi = (dbi_handle < CORE_DBS) - ? &walk.dbi[dbi_handle] - : pagemap_lookup_dbi(dbi_name, true); - if (!dbi) { - error("too many DBIs or out of memory\n"); - return MDBX_ENOMEM; - } - if (!dont_traversal) { - const uint64_t subtotal_pages = - ms.ms_branch_pages + ms.ms_leaf_pages + ms.ms_overflow_pages; - if (subtotal_pages != dbi->pages.total) - error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", - "subtotal", subtotal_pages, dbi->pages.total); - if (ms.ms_branch_pages != dbi->pages.branch) - error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", "branch", - ms.ms_branch_pages, dbi->pages.branch); - const uint64_t allleaf_pages = dbi->pages.leaf + dbi->pages.leaf_dupfixed; - if (ms.ms_leaf_pages != allleaf_pages) - error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", - "all-leaf", ms.ms_leaf_pages, allleaf_pages); - if (ms.ms_overflow_pages != dbi->pages.large_volume) - error("%s pages mismatch (%" PRIu64 " != walked %" PRIu64 ")\n", - "large/overlow", ms.ms_overflow_pages, dbi->pages.large_volume); - } - rc = mdbx_cursor_open(txn, dbi_handle, &mc); - if (rc) { - error("mdbx_cursor_open failed, error %d %s\n", rc, mdbx_strerror(rc)); - return rc; - } - - const size_t maxkeysize = mdbx_env_get_maxkeysize_ex(env, flags); - - saved_list = problems_push(); - prev_key.iov_base = NULL; - prev_key.iov_len = 0; - prev_data.iov_base = NULL; - prev_data.iov_len = 0; - rc = mdbx_cursor_get(mc, &key, &data, MDBX_FIRST); - while (rc == MDBX_SUCCESS) { - rc = check_user_break(); - if (rc) - goto bailout; - - bool bad_key = false; - if (key.iov_len > maxkeysize) { - problem_add("entry", record_count, "key length exceeds max-key-size", - "%" PRIuPTR " > %" PRIuPTR, key.iov_len, maxkeysize); - bad_key = true; - } else if ((flags & MDBX_INTEGERKEY) && key.iov_len != sizeof(uint64_t) && - key.iov_len != sizeof(uint32_t)) { - problem_add("entry", record_count, "wrong key length", - "%" PRIuPTR " != 4or8", key.iov_len); - bad_key = true; - } - - bool bad_data = false; - if ((flags & MDBX_INTEGERDUP) && data.iov_len != sizeof(uint64_t) && - data.iov_len != sizeof(uint32_t)) { - problem_add("entry", record_count, "wrong data length", - "%" PRIuPTR " != 4or8", data.iov_len); - bad_data = true; - } - - if (prev_key.iov_base && !bad_data) { - if ((flags & MDBX_DUPFIXED) && prev_data.iov_len != data.iov_len) { - problem_add("entry", record_count, "different data length", - "%" PRIuPTR " != %" PRIuPTR, prev_data.iov_len, - data.iov_len); - bad_data = true; - } - - if (!bad_key) { - int cmp = mdbx_cmp(txn, dbi_handle, &prev_key, &key); - if (cmp == 0) { - ++dups; - if ((flags & MDBX_DUPSORT) == 0) { - problem_add("entry", record_count, "duplicated entries", NULL); - if (data.iov_len == prev_data.iov_len && - memcmp(data.iov_base, prev_data.iov_base, data.iov_len) == 0) { - problem_add("entry", record_count, "complete duplicate", NULL); - } - } else if (!bad_data) { - cmp = mdbx_dcmp(txn, dbi_handle, &prev_data, &data); - if (cmp == 0) { - problem_add("entry", record_count, "complete duplicate", NULL); - } else if (cmp > 0 && !ignore_wrong_order) { - problem_add("entry", record_count, "wrong order of multi-values", - NULL); - } - } - } else if (cmp > 0 && !ignore_wrong_order) { - problem_add("entry", record_count, "wrong order of entries", NULL); - } - } - } else if (verbose) { - if (flags & MDBX_INTEGERKEY) - print(" - fixed key-size %" PRIuPTR "\n", key.iov_len); - if (flags & (MDBX_INTEGERDUP | MDBX_DUPFIXED)) - print(" - fixed data-size %" PRIuPTR "\n", data.iov_len); - } - - if (handler) { - rc = handler(record_count, &key, &data); - if (MDBX_IS_ERROR(rc)) - goto bailout; - } - - record_count++; - key_bytes += key.iov_len; - data_bytes += data.iov_len; - - if (!bad_key) - prev_key = key; - if (!bad_data) - prev_data = data; - rc = mdbx_cursor_get(mc, &key, &data, MDBX_NEXT); - } - if (rc != MDBX_NOTFOUND) - error("mdbx_cursor_get failed, error %d %s\n", rc, mdbx_strerror(rc)); - else - rc = 0; - - if (record_count != ms.ms_entries) - problem_add("entry", record_count, "differentent number of entries", - "%" PRIu64 " != %" PRIu64, record_count, ms.ms_entries); -bailout: - problems_count = problems_pop(saved_list); - if (!silent && verbose) { - print(" - summary: %" PRIu64 " records, %" PRIu64 " dups, %" PRIu64 - " key's bytes, %" PRIu64 " data's " - "bytes, %" PRIu64 " problems\n", - record_count, dups, key_bytes, data_bytes, problems_count); - fflush(NULL); - } - - mdbx_cursor_close(mc); - return (rc || problems_count) ? MDBX_RESULT_TRUE : MDBX_SUCCESS; -} - -static void usage(char *prog) { - fprintf( - stderr, - "usage: %s [-V] [-v] [-n] [-q] [-c] [-w] [-d] [-i] [-s subdb] dbpath\n" - " -V\t\tprint version and exit\n" - " -v\t\tmore verbose, could be used multiple times\n" - " -n\t\tNOSUBDIR mode for open\n" - " -q\t\tbe quiet\n" - " -c\t\tforce cooperative mode (don't try exclusive)\n" - " -w\t\tlock DB for writing while checking\n" - " -d\t\tdisable page-by-page traversal of B-tree\n" - " -i\t\tignore wrong order errors (for custom comparators case)\n" - " -s subdb\tprocess a specific subdatabase only\n", - prog); - exit(EXIT_INTERRUPTED); -} - -const char *meta_synctype(uint64_t sign) { - switch (sign) { - case MDBX_DATASIGN_NONE: - return "no-sync/legacy"; - case MDBX_DATASIGN_WEAK: - return "weak"; - default: - return "steady"; - } -} - -static __inline bool meta_ot(txnid_t txn_a, uint64_t sign_a, txnid_t txn_b, - uint64_t sign_b, const bool roolback2steady) { - if (txn_a == txn_b) - return SIGN_IS_STEADY(sign_b); - - if (roolback2steady && SIGN_IS_STEADY(sign_a) != SIGN_IS_STEADY(sign_b)) - return SIGN_IS_STEADY(sign_b); - - return txn_a < txn_b; -} - -static __inline bool meta_eq(txnid_t txn_a, uint64_t sign_a, txnid_t txn_b, - uint64_t sign_b) { - if (txn_a != txn_b) - return false; - - if (SIGN_IS_STEADY(sign_a) != SIGN_IS_STEADY(sign_b)) - return false; - - return true; -} - -static __inline int meta_recent(const bool roolback2steady) { - - if (meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, - envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, roolback2steady)) - return meta_ot(envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, - envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, - roolback2steady) - ? 1 - : 2; - - return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, - envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, roolback2steady) - ? 2 - : 0; -} - -static __inline int meta_tail(int head) { - - if (head == 0) - return meta_ot(envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, - envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, true) - ? 1 - : 2; - if (head == 1) - return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, - envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, true) - ? 0 - : 2; - if (head == 2) - return meta_ot(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, - envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, true) - ? 0 - : 1; - assert(false); - return -1; -} - -static int meta_steady(void) { return meta_recent(true); } - -static int meta_head(void) { return meta_recent(false); } - -void verbose_meta(int num, txnid_t txnid, uint64_t sign, uint64_t bootid_h, - uint64_t bootid_l) { - print(" - meta-%d: %s %" PRIu64, num, meta_synctype(sign), txnid); - bool stay = true; - const bool bootid_match = bootid_h == envinfo.mi_bootid.current.h && - bootid_l == envinfo.mi_bootid.current.l && - (bootid_h | bootid_l) != 0; - - const int steady = meta_steady(); - const int head = meta_head(); - if (num == steady && num == head) { - print(", head"); - stay = false; - } else if (num == steady) { - print(", head-steady"); - stay = false; - } else if (num == head) { - print(", head-weak%s", bootid_match ? "-intact (same boot-id)" : ""); - stay = false; - } - if (num == meta_tail(head)) { - print(", tail"); - stay = false; - } - if (stay) - print(", stay"); - - if (txnid > envinfo.mi_recent_txnid && - (envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) == MDBX_EXCLUSIVE) - print(", rolled-back %" PRIu64 " (%" PRIu64 " >>> %" PRIu64 ")", - txnid - envinfo.mi_recent_txnid, txnid, envinfo.mi_recent_txnid); - print("\n"); -} - -static uint64_t get_meta_txnid(const unsigned meta_id) { - switch (meta_id) { - default: - assert(false); - error("unexpected meta_id %u\n", meta_id); - return 0; - case 0: - return envinfo.mi_meta0_txnid; - case 1: - return envinfo.mi_meta1_txnid; - case 2: - return envinfo.mi_meta2_txnid; - } -} - -static void print_size(const char *prefix, const uint64_t value, - const char *suffix) { - const char sf[] = - "KMGTPEZY"; /* LY: Kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta! */ - double k = 1024.0; - size_t i; - for (i = 0; sf[i + 1] && value / k > 1000.0; ++i) - k *= 1024; - print("%s%" PRIu64 " (%.2f %cb)%s", prefix, value, value / k, sf[i], suffix); -} - -int main(int argc, char *argv[]) { - int rc; - char *prog = argv[0]; - char *envname; - int problems_maindb = 0, problems_freedb = 0, problems_meta = 0; - bool locked = false; - - double elapsed; -#if defined(_WIN32) || defined(_WIN64) - uint64_t timestamp_start, timestamp_finish; - timestamp_start = GetTickCount64(); -#else - struct timespec timestamp_start, timestamp_finish; - if (clock_gettime(CLOCK_MONOTONIC, ×tamp_start)) { - rc = errno; - error("clock_gettime failed, error %d %s\n", rc, mdbx_strerror(rc)); - return EXIT_FAILURE_SYS; - } -#endif - - dbi_meta.name = "@META"; - dbi_free.name = "@GC"; - dbi_main.name = "@MAIN"; - atexit(pagemap_cleanup); - - if (argc < 2) - usage(prog); - - for (int i; (i = getopt(argc, argv, "Vvqnwcdsi:")) != EOF;) { - switch (i) { - case 'V': - printf("mdbx_chk version %d.%d.%d.%d\n" - " - source: %s %s, commit %s, tree %s\n" - " - anchor: %s\n" - " - build: %s for %s by %s\n" - " - flags: %s\n" - " - options: %s\n", - mdbx_version.major, mdbx_version.minor, mdbx_version.release, - mdbx_version.revision, mdbx_version.git.describe, - mdbx_version.git.datetime, mdbx_version.git.commit, - mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, - mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, - mdbx_build.options); - return EXIT_SUCCESS; - case 'v': - verbose++; - break; - case 'q': - quiet = true; - break; - case 'n': - envflags |= MDBX_NOSUBDIR; - break; - case 'w': - envflags &= ~MDBX_RDONLY; - break; - case 'c': - envflags = (envflags & ~MDBX_EXCLUSIVE) | MDBX_ACCEDE; - break; - case 'd': - dont_traversal = true; - break; - case 's': - if (only_subdb && strcmp(only_subdb, optarg)) - usage(prog); - only_subdb = optarg; - break; - case 'i': - ignore_wrong_order = true; - break; - default: - usage(prog); - } - } - - if (optind != argc - 1) - usage(prog); - -#if defined(_WIN32) || defined(_WIN64) - SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); -#else -#ifdef SIGPIPE - signal(SIGPIPE, signal_handler); -#endif -#ifdef SIGHUP - signal(SIGHUP, signal_handler); -#endif - signal(SIGINT, signal_handler); - signal(SIGTERM, signal_handler); -#endif /* !WINDOWS */ - - envname = argv[optind]; - print("mdbx_chk %s (%s, T-%s)\nRunning for %s in 'read-%s' mode...\n", - mdbx_version.git.describe, mdbx_version.git.datetime, - mdbx_version.git.tree, envname, - (envflags & MDBX_RDONLY) ? "only" : "write"); - fflush(NULL); - - rc = mdbx_env_create(&env); - if (rc) { - error("mdbx_env_create failed, error %d %s\n", rc, mdbx_strerror(rc)); - return rc < 0 ? EXIT_FAILURE_MDB : EXIT_FAILURE_SYS; - } - - rc = mdbx_env_set_maxdbs(env, MAX_DBI); - if (rc) { - error("mdbx_env_set_maxdbs failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - rc = mdbx_env_open(env, envname, envflags, 0); - if ((envflags & MDBX_EXCLUSIVE) && - (rc == MDBX_BUSY || -#if defined(_WIN32) || defined(_WIN64) - rc == ERROR_LOCK_VIOLATION || rc == ERROR_SHARING_VIOLATION -#else - rc == EBUSY || rc == EAGAIN -#endif - )) { - envflags &= ~MDBX_EXCLUSIVE; - rc = mdbx_env_open(env, envname, envflags | MDBX_ACCEDE, 0); - } - - if (rc) { - error("mdbx_env_open failed, error %d %s\n", rc, mdbx_strerror(rc)); - if (rc == MDBX_WANNA_RECOVERY && (envflags & MDBX_RDONLY)) - print("Please run %s in the read-write mode (with '-w' option).\n", prog); - goto bailout; - } - if (verbose) - print(" - %s mode\n", - (envflags & MDBX_EXCLUSIVE) ? "monopolistic" : "cooperative"); - - if ((envflags & MDBX_RDONLY) == 0) { - rc = mdbx_txn_lock(env, false); - if (rc != MDBX_SUCCESS) { - error("mdbx_txn_lock failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - locked = true; - } - - rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn); - if (rc) { - error("mdbx_txn_begin() failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - rc = mdbx_env_info_ex(env, txn, &envinfo, sizeof(envinfo)); - if (rc) { - error("mdbx_env_info failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - rc = mdbx_env_stat_ex(env, txn, &envstat, sizeof(envstat)); - if (rc) { - error("mdbx_env_stat failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - mdbx_filehandle_t dxb_fd; - rc = mdbx_env_get_fd(env, &dxb_fd); - if (rc) { - error("mdbx_env_get_fd failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - uint64_t dxb_filesize = 0; -#if defined(_WIN32) || defined(_WIN64) - { - BY_HANDLE_FILE_INFORMATION info; - if (!GetFileInformationByHandle(dxb_fd, &info)) - rc = GetLastError(); - else - dxb_filesize = info.nFileSizeLow | (uint64_t)info.nFileSizeHigh << 32; - } -#else - { - struct stat st; - STATIC_ASSERT_MSG(sizeof(off_t) <= sizeof(uint64_t), - "libmdbx requires 64-bit file I/O on 64-bit systems"); - if (fstat(dxb_fd, &st)) - rc = errno; - else - dxb_filesize = st.st_size; - } -#endif - if (rc) { - error("mdbx_filesize failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - errno = 0; - const uint64_t dxbfile_pages = dxb_filesize / envinfo.mi_dxb_pagesize; - alloc_pages = txn->mt_next_pgno; - backed_pages = envinfo.mi_geo.current / envinfo.mi_dxb_pagesize; - if (backed_pages > dxbfile_pages) { - print(" ! backed-pages %" PRIu64 " > file-pages %" PRIu64 "\n", - backed_pages, dxbfile_pages); - ++problems_meta; - } - if (dxbfile_pages < NUM_METAS) - print(" ! file-pages %" PRIu64 " < %u\n", dxbfile_pages, NUM_METAS); - if (backed_pages < NUM_METAS) - print(" ! backed-pages %" PRIu64 " < %u\n", backed_pages, NUM_METAS); - if (backed_pages < NUM_METAS || dxbfile_pages < NUM_METAS) - goto bailout; - if (backed_pages > MAX_PAGENO) { - print(" ! backed-pages %" PRIu64 " > max-pages %" PRIaPGNO "\n", - backed_pages, MAX_PAGENO); - ++problems_meta; - backed_pages = MAX_PAGENO; - } - - if ((envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_RDONLY) { - if (backed_pages > dxbfile_pages) { - print(" ! backed-pages %" PRIu64 " > file-pages %" PRIu64 "\n", - backed_pages, dxbfile_pages); - ++problems_meta; - backed_pages = dxbfile_pages; - } - if (alloc_pages > backed_pages) { - print(" ! alloc-pages %" PRIu64 " > backed-pages %" PRIu64 "\n", - alloc_pages, backed_pages); - ++problems_meta; - alloc_pages = backed_pages; - } - } else { - /* LY: DB may be shrinked by writer downto the allocated pages. */ - if (alloc_pages > backed_pages) { - print(" ! alloc-pages %" PRIu64 " > backed-pages %" PRIu64 "\n", - alloc_pages, backed_pages); - ++problems_meta; - alloc_pages = backed_pages; - } - if (alloc_pages > dxbfile_pages) { - print(" ! alloc-pages %" PRIu64 " > file-pages %" PRIu64 "\n", - alloc_pages, dxbfile_pages); - ++problems_meta; - alloc_pages = dxbfile_pages; - } - if (backed_pages > dxbfile_pages) - backed_pages = dxbfile_pages; - } - - if (verbose) { - print(" - pagesize %u (%u system), max keysize %d..%d" - ", max readers %u\n", - envinfo.mi_dxb_pagesize, envinfo.mi_sys_pagesize, - mdbx_env_get_maxkeysize_ex(env, MDBX_DUPSORT), - mdbx_env_get_maxkeysize_ex(env, 0), envinfo.mi_maxreaders); - print_size(" - mapsize ", envinfo.mi_mapsize, "\n"); - if (envinfo.mi_geo.lower == envinfo.mi_geo.upper) - print_size(" - fixed datafile: ", envinfo.mi_geo.current, ""); - else { - print_size(" - dynamic datafile: ", envinfo.mi_geo.lower, ""); - print_size(" .. ", envinfo.mi_geo.upper, ", "); - print_size("+", envinfo.mi_geo.grow, ", "); - print_size("-", envinfo.mi_geo.shrink, "\n"); - print_size(" - current datafile: ", envinfo.mi_geo.current, ""); - } - printf(", %" PRIu64 " pages\n", - envinfo.mi_geo.current / envinfo.mi_dxb_pagesize); -#if defined(_WIN32) || defined(_WIN64) - if (envinfo.mi_geo.shrink && envinfo.mi_geo.current != envinfo.mi_geo.upper) - print(" WARNING: Due Windows system limitations a " - "file couldn't\n be truncated while database " - "is opened. So, the size of\n database file " - "may by large than the database itself,\n " - "until it will be closed or reopened in read-write mode.\n"); -#endif - print(" - transactions: recent %" PRIu64 ", latter reader %" PRIu64 - ", lag %" PRIi64 "\n", - envinfo.mi_recent_txnid, envinfo.mi_latter_reader_txnid, - envinfo.mi_recent_txnid - envinfo.mi_latter_reader_txnid); - - verbose_meta(0, envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, - envinfo.mi_bootid.meta0.h, envinfo.mi_bootid.meta0.l); - verbose_meta(1, envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, - envinfo.mi_bootid.meta1.h, envinfo.mi_bootid.meta1.l); - verbose_meta(2, envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, - envinfo.mi_bootid.meta2.h, envinfo.mi_bootid.meta2.l); - } - - if (verbose > 1) - print(" - performs check for meta-pages clashes\n"); - if (meta_eq(envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign, - envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign)) { - print(" ! meta-%d and meta-%d are clashed\n", 0, 1); - ++problems_meta; - } - if (meta_eq(envinfo.mi_meta1_txnid, envinfo.mi_meta1_sign, - envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign)) { - print(" ! meta-%d and meta-%d are clashed\n", 1, 2); - ++problems_meta; - } - if (meta_eq(envinfo.mi_meta2_txnid, envinfo.mi_meta2_sign, - envinfo.mi_meta0_txnid, envinfo.mi_meta0_sign)) { - print(" ! meta-%d and meta-%d are clashed\n", 2, 0); - ++problems_meta; - } - - const unsigned steady_meta_id = meta_recent(true); - const uint64_t steady_meta_txnid = get_meta_txnid(steady_meta_id); - const unsigned weak_meta_id = meta_recent(false); - const uint64_t weak_meta_txnid = get_meta_txnid(weak_meta_id); - if (envflags & MDBX_EXCLUSIVE) { - if (verbose > 1) - print(" - performs full check recent-txn-id with meta-pages\n"); - if (steady_meta_txnid != envinfo.mi_recent_txnid) { - print(" ! steady meta-%d txn-id mismatch recent-txn-id (%" PRIi64 - " != %" PRIi64 ")\n", - steady_meta_id, steady_meta_txnid, envinfo.mi_recent_txnid); - ++problems_meta; - } - } else if (locked) { - if (verbose > 1) - print(" - performs lite check recent-txn-id with meta-pages (not a " - "monopolistic mode)\n"); - if (weak_meta_txnid != envinfo.mi_recent_txnid) { - print(" ! weak meta-%d txn-id mismatch recent-txn-id (%" PRIi64 - " != %" PRIi64 ")\n", - weak_meta_id, weak_meta_txnid, envinfo.mi_recent_txnid); - ++problems_meta; - } - } else if (verbose) { - print(" - skip check recent-txn-id with meta-pages (monopolistic or " - "read-write mode only)\n"); - } - total_problems += problems_meta; - - if (!dont_traversal) { - struct problem *saved_list; - size_t traversal_problems; - uint64_t empty_pages, lost_bytes; - - print("Traversal b-tree by txn#%" PRIaTXN "...\n", txn->mt_txnid); - fflush(NULL); - walk.pagemap = mdbx_calloc((size_t)backed_pages, sizeof(*walk.pagemap)); - if (!walk.pagemap) { - rc = errno ? errno : MDBX_ENOMEM; - error("calloc failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - saved_list = problems_push(); - rc = mdbx_env_pgwalk(txn, pgvisitor, NULL); - traversal_problems = problems_pop(saved_list); - - if (rc) { - if (rc != MDBX_EINTR || !check_user_break()) - error("mdbx_env_pgwalk failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto bailout; - } - - for (uint64_t n = 0; n < alloc_pages; ++n) - if (!walk.pagemap[n]) - unused_pages += 1; - - empty_pages = lost_bytes = 0; - for (walk_dbi_t *dbi = &dbi_main; dbi < ARRAY_END(walk.dbi) && dbi->name; - ++dbi) { - empty_pages += dbi->pages.empty; - lost_bytes += dbi->lost_bytes; - } - - if (verbose) { - uint64_t total_page_bytes = walk.pgcount * envstat.ms_psize; - print(" - pages: total %" PRIu64 ", unused %" PRIu64 "\n", walk.pgcount, - unused_pages); - if (verbose > 1) { - for (walk_dbi_t *dbi = walk.dbi; dbi < ARRAY_END(walk.dbi) && dbi->name; - ++dbi) { - print(" %s: subtotal %" PRIu64, dbi->name, dbi->pages.total); - if (dbi->pages.other && dbi->pages.other != dbi->pages.total) - print(", other %" PRIu64, dbi->pages.other); - if (dbi->pages.branch) - print(", branch %" PRIu64, dbi->pages.branch); - if (dbi->pages.large_count) - print(", large %" PRIu64, dbi->pages.large_count); - uint64_t all_leaf = dbi->pages.leaf + dbi->pages.leaf_dupfixed; - if (all_leaf) { - print(", leaf %" PRIu64, all_leaf); - if (verbose > 2 && - (dbi->pages.leaf_dupfixed | dbi->pages.subleaf_dupsort | - dbi->pages.subleaf_dupsort)) - print(" (usual %" PRIu64 ", sub-dupsort %" PRIu64 - ", dupfixed %" PRIu64 ", sub-dupfixed %" PRIu64 ")", - dbi->pages.leaf, dbi->pages.subleaf_dupsort, - dbi->pages.leaf_dupfixed, dbi->pages.subleaf_dupfixed); - } - print("\n"); - } - } - - if (verbose > 1) - print(" - usage: total %" PRIu64 " bytes, payload %" PRIu64 - " (%.1f%%), unused " - "%" PRIu64 " (%.1f%%)\n", - total_page_bytes, walk.total_payload_bytes, - walk.total_payload_bytes * 100.0 / total_page_bytes, - total_page_bytes - walk.total_payload_bytes, - (total_page_bytes - walk.total_payload_bytes) * 100.0 / - total_page_bytes); - if (verbose > 2) { - for (walk_dbi_t *dbi = walk.dbi; dbi < ARRAY_END(walk.dbi) && dbi->name; - ++dbi) - if (dbi->pages.total) { - uint64_t dbi_bytes = dbi->pages.total * envstat.ms_psize; - print(" %s: subtotal %" PRIu64 " bytes (%.1f%%)," - " payload %" PRIu64 " (%.1f%%), unused %" PRIu64 " (%.1f%%)", - dbi->name, dbi_bytes, dbi_bytes * 100.0 / total_page_bytes, - dbi->payload_bytes, dbi->payload_bytes * 100.0 / dbi_bytes, - dbi_bytes - dbi->payload_bytes, - (dbi_bytes - dbi->payload_bytes) * 100.0 / dbi_bytes); - if (dbi->pages.empty) - print(", %" PRIu64 " empty pages", dbi->pages.empty); - if (dbi->lost_bytes) - print(", %" PRIu64 " bytes lost", dbi->lost_bytes); - print("\n"); - } else - print(" %s: empty\n", dbi->name); - } - print(" - summary: average fill %.1f%%", - walk.total_payload_bytes * 100.0 / total_page_bytes); - if (empty_pages) - print(", %" PRIu64 " empty pages", empty_pages); - if (lost_bytes) - print(", %" PRIu64 " bytes lost", lost_bytes); - print(", %" PRIuPTR " problems\n", traversal_problems); - } - } else if (verbose) { - print("Skipping b-tree walk...\n"); - fflush(NULL); - } - - if (!verbose) - print("Iterating DBIs...\n"); - problems_maindb = process_db(~0u, /* MAIN_DBI */ NULL, NULL, false); - problems_freedb = process_db(FREE_DBI, "@GC", handle_freedb, false); - - if (verbose) { - uint64_t value = envinfo.mi_mapsize / envstat.ms_psize; - double percent = value / 100.0; - print(" - space: %" PRIu64 " total pages", value); - print(", backed %" PRIu64 " (%.1f%%)", backed_pages, - backed_pages / percent); - print(", allocated %" PRIu64 " (%.1f%%)", alloc_pages, - alloc_pages / percent); - - if (verbose > 1) { - value = envinfo.mi_mapsize / envstat.ms_psize - alloc_pages; - print(", remained %" PRIu64 " (%.1f%%)", value, value / percent); - - value = alloc_pages - gc_pages; - print(", used %" PRIu64 " (%.1f%%)", value, value / percent); - - print(", gc %" PRIu64 " (%.1f%%)", gc_pages, gc_pages / percent); - - value = gc_pages - reclaimable_pages; - print(", detained %" PRIu64 " (%.1f%%)", value, value / percent); - - print(", reclaimable %" PRIu64 " (%.1f%%)", reclaimable_pages, - reclaimable_pages / percent); - } - - value = - envinfo.mi_mapsize / envstat.ms_psize - alloc_pages + reclaimable_pages; - print(", available %" PRIu64 " (%.1f%%)\n", value, value / percent); - } - - if (problems_maindb == 0 && problems_freedb == 0) { - if (!dont_traversal && - (envflags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_RDONLY) { - if (walk.pgcount != alloc_pages - gc_pages) { - error("used pages mismatch (%" PRIu64 "(walked) != %" PRIu64 - "(allocated - GC))\n", - walk.pgcount, alloc_pages - gc_pages); - } - if (unused_pages != gc_pages) { - error("gc pages mismatch (%" PRIu64 "(walked) != %" PRIu64 "(GC))\n", - unused_pages, gc_pages); - } - } else if (verbose) { - print(" - skip check used and gc pages (btree-traversal with " - "monopolistic or read-write mode only)\n"); - } - - if (!process_db(MAIN_DBI, NULL, handle_maindb, true)) { - if (!userdb_count && verbose) - print(" - does not contain multiple databases\n"); - } - } - - if (rc == 0 && total_problems == 1 && problems_meta == 1 && !dont_traversal && - (envflags & MDBX_RDONLY) == 0 && !only_subdb && - steady_meta_txnid < envinfo.mi_recent_txnid) { - print("Perform sync-to-disk for make steady checkpoint at txn-id #%" PRIi64 - "\n", - envinfo.mi_recent_txnid); - fflush(NULL); - if (locked) { - mdbx_txn_unlock(env); - locked = false; - } - rc = mdbx_env_sync_ex(env, true, false); - if (rc != MDBX_SUCCESS) - error("mdbx_env_pgwalk failed, error %d %s\n", rc, mdbx_strerror(rc)); - else { - total_problems -= 1; - problems_meta -= 1; - } - } - -bailout: - if (txn) - mdbx_txn_abort(txn); - if (locked) { - mdbx_txn_unlock(env); - locked = false; - } - if (env) { - const bool dont_sync = rc != 0 || total_problems; - mdbx_env_close_ex(env, dont_sync); - } - fflush(NULL); - if (rc) { - if (rc < 0) - return user_break ? EXIT_INTERRUPTED : EXIT_FAILURE_SYS; - return EXIT_FAILURE_MDB; - } - -#if defined(_WIN32) || defined(_WIN64) - timestamp_finish = GetTickCount64(); - elapsed = (timestamp_finish - timestamp_start) * 1e-3; -#else - if (clock_gettime(CLOCK_MONOTONIC, ×tamp_finish)) { - rc = errno; - error("clock_gettime failed, error %d %s\n", rc, mdbx_strerror(rc)); - return EXIT_FAILURE_SYS; - } - elapsed = timestamp_finish.tv_sec - timestamp_start.tv_sec + - (timestamp_finish.tv_nsec - timestamp_start.tv_nsec) * 1e-9; -#endif /* !WINDOWS */ - - if (total_problems) { - print("Total %" PRIu64 " error%s detected, elapsed %.3f seconds.\n", - total_problems, (total_problems > 1) ? "s are" : " is", elapsed); - if (problems_meta || problems_maindb || problems_freedb) - return EXIT_FAILURE_CHECK_MAJOR; - return EXIT_FAILURE_CHECK_MINOR; - } - print("No error is detected, elapsed %.3f seconds\n", elapsed); - return EXIT_SUCCESS; -} diff --git a/libs/libmdbx/src/src/tools/mdbx_copy.c b/libs/libmdbx/src/src/tools/mdbx_copy.c deleted file mode 100644 index 8545b38809..0000000000 --- a/libs/libmdbx/src/src/tools/mdbx_copy.c +++ /dev/null @@ -1,143 +0,0 @@ -/* mdbx_copy.c - memory-mapped database backup tool */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . */ - -#ifdef _MSC_VER -#if _MSC_VER > 1800 -#pragma warning(disable : 4464) /* relative include path contains '..' */ -#endif -#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ -#endif /* _MSC_VER (warnings) */ - -#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ -#include "../elements/internals.h" - -#if defined(_WIN32) || defined(_WIN64) -#include "wingetopt.h" - -static volatile BOOL user_break; -static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { - (void)dwCtrlType; - user_break = true; - return true; -} - -#else /* WINDOWS */ - -static volatile sig_atomic_t user_break; -static void signal_handler(int sig) { - (void)sig; - user_break = 1; -} - -#endif /* !WINDOWS */ - -static void usage(const char *prog) { - fprintf(stderr, - "usage: %s [-V] [-q] [-c] [-n] src_path [dest_path]\n" - " -V\t\tprint version and exit\n" - " -q\t\tbe quiet\n" - " -c\t\tenable compactification (skip unused pages)\n" - " -n\t\tNOSUBDIR mode for open\n" - " src_path\tsource database\n" - " dest_path\tdestination (stdout if not specified)\n", - prog); - exit(EXIT_FAILURE); -} - -int main(int argc, char *argv[]) { - int rc; - MDBX_env *env = NULL; - const char *progname = argv[0], *act; - unsigned flags = MDBX_RDONLY; - unsigned cpflags = 0; - bool quiet = false; - - for (; argc > 1 && argv[1][0] == '-'; argc--, argv++) { - if (argv[1][1] == 'n' && argv[1][2] == '\0') - flags |= MDBX_NOSUBDIR; - else if (argv[1][1] == 'c' && argv[1][2] == '\0') - cpflags |= MDBX_CP_COMPACT; - else if (argv[1][1] == 'q' && argv[1][2] == '\0') - quiet = true; - else if ((argv[1][1] == 'h' && argv[1][2] == '\0') || - strcmp(argv[1], "--help") == 0) - usage(progname); - else if (argv[1][1] == 'V' && argv[1][2] == '\0') { - printf("mdbx_copy version %d.%d.%d.%d\n" - " - source: %s %s, commit %s, tree %s\n" - " - anchor: %s\n" - " - build: %s for %s by %s\n" - " - flags: %s\n" - " - options: %s\n", - mdbx_version.major, mdbx_version.minor, mdbx_version.release, - mdbx_version.revision, mdbx_version.git.describe, - mdbx_version.git.datetime, mdbx_version.git.commit, - mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, - mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, - mdbx_build.options); - return EXIT_SUCCESS; - } else - argc = 0; - } - - if (argc < 2 || argc > 3) - usage(progname); - -#if defined(_WIN32) || defined(_WIN64) - SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); -#else -#ifdef SIGPIPE - signal(SIGPIPE, signal_handler); -#endif -#ifdef SIGHUP - signal(SIGHUP, signal_handler); -#endif - signal(SIGINT, signal_handler); - signal(SIGTERM, signal_handler); -#endif /* !WINDOWS */ - - if (!quiet) { - fprintf((argc == 2) ? stderr : stdout, - "mdbx_copy %s (%s, T-%s)\nRunning for copy %s to %s...\n", - mdbx_version.git.describe, mdbx_version.git.datetime, - mdbx_version.git.tree, argv[1], (argc == 2) ? "stdout" : argv[2]); - fflush(NULL); - } - - act = "opening environment"; - rc = mdbx_env_create(&env); - if (rc == MDBX_SUCCESS) { - rc = mdbx_env_open(env, argv[1], flags, 0640); - } - if (rc == MDBX_SUCCESS) { - act = "copying"; - if (argc == 2) { - mdbx_filehandle_t fd; -#if defined(_WIN32) || defined(_WIN64) - fd = GetStdHandle(STD_OUTPUT_HANDLE); -#else - fd = fileno(stdout); -#endif - rc = mdbx_env_copy2fd(env, fd, cpflags); - } else - rc = mdbx_env_copy(env, argv[2], cpflags); - } - if (rc) - fprintf(stderr, "%s: %s failed, error %d (%s)\n", progname, act, rc, - mdbx_strerror(rc)); - mdbx_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/libs/libmdbx/src/src/tools/mdbx_dump.c b/libs/libmdbx/src/src/tools/mdbx_dump.c deleted file mode 100644 index 3afabc0b4a..0000000000 --- a/libs/libmdbx/src/src/tools/mdbx_dump.c +++ /dev/null @@ -1,389 +0,0 @@ -/* mdbx_dump.c - memory-mapped database dump tool */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . */ - -#ifdef _MSC_VER -#if _MSC_VER > 1800 -#pragma warning(disable : 4464) /* relative include path contains '..' */ -#endif -#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ -#endif /* _MSC_VER (warnings) */ - -#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ -#include "../elements/internals.h" - -#include - -#define PRINT 1 -static int mode; - -typedef struct flagbit { - int bit; - char *name; -} flagbit; - -flagbit dbflags[] = {{MDBX_REVERSEKEY, "reversekey"}, - {MDBX_DUPSORT, "dupsort"}, - {MDBX_INTEGERKEY, "integerkey"}, - {MDBX_DUPFIXED, "dupfixed"}, - {MDBX_INTEGERDUP, "integerdup"}, - {MDBX_REVERSEDUP, "reversedup"}, - {0, NULL}}; - -#if defined(_WIN32) || defined(_WIN64) -#include "wingetopt.h" - -static volatile BOOL user_break; -static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { - (void)dwCtrlType; - user_break = true; - return true; -} - -#else /* WINDOWS */ - -static volatile sig_atomic_t user_break; -static void signal_handler(int sig) { - (void)sig; - user_break = 1; -} - -#endif /* !WINDOWS */ - -static const char hexc[] = "0123456789abcdef"; - -static void dumpbyte(unsigned char c) { - putchar(hexc[c >> 4]); - putchar(hexc[c & 0xf]); -} - -static void text(MDBX_val *v) { - unsigned char *c, *end; - - putchar(' '); - c = v->iov_base; - end = c + v->iov_len; - while (c < end) { - if (isprint(*c) && *c != '\\') { - putchar(*c); - } else { - putchar('\\'); - dumpbyte(*c); - } - c++; - } - putchar('\n'); -} - -static void dumpval(MDBX_val *v) { - unsigned char *c, *end; - - putchar(' '); - c = v->iov_base; - end = c + v->iov_len; - while (c < end) { - dumpbyte(*c++); - } - putchar('\n'); -} - -/* Dump in BDB-compatible format */ -static int dumpit(MDBX_txn *txn, MDBX_dbi dbi, char *name) { - MDBX_cursor *mc; - MDBX_stat ms; - MDBX_val key, data; - MDBX_envinfo info; - unsigned int flags; - int rc, i; - - rc = mdbx_dbi_flags(txn, dbi, &flags); - if (rc) - return rc; - - rc = mdbx_dbi_stat(txn, dbi, &ms, sizeof(ms)); - if (rc) - return rc; - - rc = mdbx_env_info_ex(mdbx_txn_env(txn), txn, &info, sizeof(info)); - if (rc) - return rc; - - printf("VERSION=3\n"); - printf("format=%s\n", mode & PRINT ? "print" : "bytevalue"); - if (name) - printf("database=%s\n", name); - printf("type=btree\n"); - printf("mapsize=%" PRIu64 "\n", info.mi_geo.upper); - printf("maxreaders=%u\n", info.mi_maxreaders); - - for (i = 0; dbflags[i].bit; i++) - if (flags & dbflags[i].bit) - printf("%s=1\n", dbflags[i].name); - - printf("db_pagesize=%d\n", ms.ms_psize); - printf("HEADER=END\n"); - - rc = mdbx_cursor_open(txn, dbi, &mc); - if (rc) - return rc; - - while ((rc = mdbx_cursor_get(mc, &key, &data, MDBX_NEXT)) == MDBX_SUCCESS) { - if (user_break) { - rc = MDBX_EINTR; - break; - } - if (mode & PRINT) { - text(&key); - text(&data); - } else { - dumpval(&key); - dumpval(&data); - } - } - printf("DATA=END\n"); - if (rc == MDBX_NOTFOUND) - rc = MDBX_SUCCESS; - - return rc; -} - -static void usage(char *prog) { - fprintf(stderr, - "usage: %s [-V] [-q] [-f file] [-l] [-p] [-a|-s subdb] [-r] [-n] " - "dbpath\n" - " -V\t\tprint version and exit\n" - " -q\t\tbe quiet\n" - " -f\t\twrite to file instead of stdout\n" - " -l\t\tlist subDBs and exit\n" - " -p\t\tuse printable characters\n" - " -a\t\tdump main DB and all subDBs,\n" - " \t\tby default dump only the main DB\n" - " -s\t\tdump only the named subDB\n" - " -r\t\trescure mode (ignore errors to dump corrupted DB)\n" - " -n\t\tNOSUBDIR mode for open\n", - prog); - exit(EXIT_FAILURE); -} - -int main(int argc, char *argv[]) { - int i, rc; - MDBX_env *env; - MDBX_txn *txn; - MDBX_dbi dbi; - char *prog = argv[0]; - char *envname; - char *subname = NULL; - int alldbs = 0, envflags = 0, list = 0, quiet = 0, rescue = 0; - - if (argc < 2) - usage(prog); - - while ((i = getopt(argc, argv, "af:lnps:Vrq")) != EOF) { - switch (i) { - case 'V': - printf("mdbx_dump version %d.%d.%d.%d\n" - " - source: %s %s, commit %s, tree %s\n" - " - anchor: %s\n" - " - build: %s for %s by %s\n" - " - flags: %s\n" - " - options: %s\n", - mdbx_version.major, mdbx_version.minor, mdbx_version.release, - mdbx_version.revision, mdbx_version.git.describe, - mdbx_version.git.datetime, mdbx_version.git.commit, - mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, - mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, - mdbx_build.options); - return EXIT_SUCCESS; - case 'l': - list = 1; - /*FALLTHROUGH*/; - __fallthrough; - case 'a': - if (subname) - usage(prog); - alldbs++; - break; - case 'f': - if (freopen(optarg, "w", stdout) == NULL) { - fprintf(stderr, "%s: %s: reopen: %s\n", prog, optarg, - mdbx_strerror(errno)); - exit(EXIT_FAILURE); - } - break; - case 'n': - envflags |= MDBX_NOSUBDIR; - break; - case 'p': - mode |= PRINT; - break; - case 's': - if (alldbs) - usage(prog); - subname = optarg; - break; - case 'q': - quiet = 1; - break; - case 'r': - rescue = 1; - break; - default: - usage(prog); - } - } - - if (optind != argc - 1) - usage(prog); - -#if defined(_WIN32) || defined(_WIN64) - SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); -#else -#ifdef SIGPIPE - signal(SIGPIPE, signal_handler); -#endif -#ifdef SIGHUP - signal(SIGHUP, signal_handler); -#endif - signal(SIGINT, signal_handler); - signal(SIGTERM, signal_handler); -#endif /* !WINDOWS */ - - envname = argv[optind]; - if (!quiet) { - fprintf(stderr, "mdbx_dump %s (%s, T-%s)\nRunning for %s...\n", - mdbx_version.git.describe, mdbx_version.git.datetime, - mdbx_version.git.tree, envname); - fflush(NULL); - } - - rc = mdbx_env_create(&env); - if (rc) { - fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc, - mdbx_strerror(rc)); - return EXIT_FAILURE; - } - - if (alldbs || subname) { - mdbx_env_set_maxdbs(env, 2); - } - - rc = mdbx_env_open( - env, envname, - envflags | (rescue ? MDBX_RDONLY | MDBX_EXCLUSIVE : MDBX_RDONLY), 0); - if (rc) { - fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - - rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn); - if (rc) { - fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - - rc = mdbx_dbi_open(txn, subname, 0, &dbi); - if (rc) { - fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto txn_abort; - } - - if (alldbs) { - MDBX_cursor *cursor; - MDBX_val key; - int count = 0; - - rc = mdbx_cursor_open(txn, dbi, &cursor); - if (rc) { - fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - while ((rc = mdbx_cursor_get(cursor, &key, NULL, MDBX_NEXT_NODUP)) == 0) { - if (user_break) { - rc = MDBX_EINTR; - break; - } - char *str; - MDBX_dbi db2; - if (memchr(key.iov_base, '\0', key.iov_len)) - continue; - count++; - str = mdbx_malloc(key.iov_len + 1); - memcpy(str, key.iov_base, key.iov_len); - str[key.iov_len] = '\0'; - rc = mdbx_dbi_open(txn, str, 0, &db2); - if (rc == MDBX_SUCCESS) { - if (list) { - printf("%s\n", str); - list++; - } else { - rc = dumpit(txn, db2, str); - if (rc) { - if (!rescue) - break; - fprintf(stderr, "%s: %s: ignore %s for `%s` and continue\n", prog, - envname, mdbx_strerror(rc), str); - /* Here is a hack for rescue mode, don't do that: - * - we should restart transaction in case error due - * database corruption; - * - but we won't close cursor, reopen and re-positioning it - * for new a transaction; - * - this is possible since DB is opened in read-only exclusive - * mode and transaction is the same, i.e. has the same address - * and so on. */ - rc = mdbx_txn_reset(txn); - if (rc) { - fprintf(stderr, "mdbx_txn_reset failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - rc = mdbx_txn_renew(txn); - if (rc) { - fprintf(stderr, "mdbx_txn_renew failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - } - } - mdbx_dbi_close(env, db2); - } - mdbx_free(str); - if (rc) - continue; - } - mdbx_cursor_close(cursor); - if (!count) { - fprintf(stderr, "%s: %s does not contain multiple databases\n", prog, - envname); - rc = MDBX_NOTFOUND; - } else if (rc == MDBX_INCOMPATIBLE) { - /* LY: the record it not a named sub-db. */ - rc = MDBX_SUCCESS; - } - } else { - rc = dumpit(txn, dbi, subname); - } - if (rc && rc != MDBX_NOTFOUND) - fprintf(stderr, "%s: %s: %s\n", prog, envname, mdbx_strerror(rc)); - - mdbx_dbi_close(env, dbi); -txn_abort: - mdbx_txn_abort(txn); -env_close: - mdbx_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/libs/libmdbx/src/src/tools/mdbx_load.c b/libs/libmdbx/src/src/tools/mdbx_load.c deleted file mode 100644 index 449848e7b8..0000000000 --- a/libs/libmdbx/src/src/tools/mdbx_load.c +++ /dev/null @@ -1,617 +0,0 @@ -/* mdbx_load.c - memory-mapped database load tool */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . */ - -#ifdef _MSC_VER -#if _MSC_VER > 1800 -#pragma warning(disable : 4464) /* relative include path contains '..' */ -#endif -#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ -#endif /* _MSC_VER (warnings) */ - -#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ -#include "../elements/internals.h" - -#include - -#if defined(_WIN32) || defined(_WIN64) -#include "wingetopt.h" - -static volatile BOOL user_break; -static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { - (void)dwCtrlType; - user_break = true; - return true; -} - -#else /* WINDOWS */ - -static volatile sig_atomic_t user_break; -static void signal_handler(int sig) { - (void)sig; - user_break = 1; -} - -#endif /* !WINDOWS */ - -#define PRINT 1 -#define NOHDR 2 -static int mode; - -static char *subname = NULL; -static size_t lineno; -static int version; - -static int dbi_flags; -static char *prog; -static bool Eof; - -static MDBX_envinfo envinfo; -static MDBX_val kbuf, dbuf; -static MDBX_val k0buf; - -#define STRLENOF(s) (sizeof(s) - 1) - -typedef struct flagbit { - int bit; - char *name; - int len; -} flagbit; - -#define S(s) s, STRLENOF(s) - -flagbit dbflags[] = {{MDBX_REVERSEKEY, S("reversekey")}, - {MDBX_DUPSORT, S("dupsort")}, - {MDBX_INTEGERKEY, S("integerkey")}, - {MDBX_DUPFIXED, S("dupfixed")}, - {MDBX_INTEGERDUP, S("integerdup")}, - {MDBX_REVERSEDUP, S("reversedup")}, - {0, NULL, 0}}; - -static void readhdr(void) { - char *ptr; - - dbi_flags = 0; - while (fgets(dbuf.iov_base, (int)dbuf.iov_len, stdin) != NULL) { - lineno++; - - if (!strncmp(dbuf.iov_base, "db_pagesize=", STRLENOF("db_pagesize="))) { - envinfo.mi_dxb_pagesize = - atoi((char *)dbuf.iov_base + STRLENOF("db_pagesize=")); - continue; - } - - if (!strncmp(dbuf.iov_base, "duplicates=", STRLENOF("duplicates="))) { - dbi_flags |= MDBX_DUPSORT; - continue; - } - - if (!strncmp(dbuf.iov_base, "VERSION=", STRLENOF("VERSION="))) { - version = atoi((char *)dbuf.iov_base + STRLENOF("VERSION=")); - if (version > 3) { - fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported VERSION %d\n", - prog, lineno, version); - exit(EXIT_FAILURE); - } - continue; - } - - if (!strncmp(dbuf.iov_base, "HEADER=END", STRLENOF("HEADER=END"))) - return; - - if (!strncmp(dbuf.iov_base, "format=", STRLENOF("format="))) { - if (!strncmp((char *)dbuf.iov_base + STRLENOF("FORMAT="), "print", - STRLENOF("print"))) - mode |= PRINT; - else if (strncmp((char *)dbuf.iov_base + STRLENOF("FORMAT="), "bytevalue", - STRLENOF("bytevalue"))) { - fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported FORMAT %s\n", prog, - lineno, (char *)dbuf.iov_base + STRLENOF("FORMAT=")); - exit(EXIT_FAILURE); - } - continue; - } - - if (!strncmp(dbuf.iov_base, "database=", STRLENOF("database="))) { - ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); - if (ptr) - *ptr = '\0'; - if (subname) - mdbx_free(subname); - subname = mdbx_strdup((char *)dbuf.iov_base + STRLENOF("database=")); - continue; - } - - if (!strncmp(dbuf.iov_base, "type=", STRLENOF("type="))) { - if (strncmp((char *)dbuf.iov_base + STRLENOF("type="), "btree", - STRLENOF("btree"))) { - fprintf(stderr, "%s: line %" PRIiSIZE ": unsupported type %s\n", prog, - lineno, (char *)dbuf.iov_base + STRLENOF("type=")); - exit(EXIT_FAILURE); - } - continue; - } - - if (!strncmp(dbuf.iov_base, "mapaddr=", STRLENOF("mapaddr="))) { - int i; - ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); - if (ptr) - *ptr = '\0'; - void *unused; - i = sscanf((char *)dbuf.iov_base + STRLENOF("mapaddr="), "%p", &unused); - if (i != 1) { - fprintf(stderr, "%s: line %" PRIiSIZE ": invalid mapaddr %s\n", prog, - lineno, (char *)dbuf.iov_base + STRLENOF("mapaddr=")); - exit(EXIT_FAILURE); - } - continue; - } - - if (!strncmp(dbuf.iov_base, "mapsize=", STRLENOF("mapsize="))) { - int i; - ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); - if (ptr) - *ptr = '\0'; - i = sscanf((char *)dbuf.iov_base + STRLENOF("mapsize="), "%" PRIu64, - &envinfo.mi_mapsize); - if (i != 1) { - fprintf(stderr, "%s: line %" PRIiSIZE ": invalid mapsize %s\n", prog, - lineno, (char *)dbuf.iov_base + STRLENOF("mapsize=")); - exit(EXIT_FAILURE); - } - continue; - } - - if (!strncmp(dbuf.iov_base, "maxreaders=", STRLENOF("maxreaders="))) { - int i; - ptr = memchr(dbuf.iov_base, '\n', dbuf.iov_len); - if (ptr) - *ptr = '\0'; - i = sscanf((char *)dbuf.iov_base + STRLENOF("maxreaders="), "%u", - &envinfo.mi_maxreaders); - if (i != 1) { - fprintf(stderr, "%s: line %" PRIiSIZE ": invalid maxreaders %s\n", prog, - lineno, (char *)dbuf.iov_base + STRLENOF("maxreaders=")); - exit(EXIT_FAILURE); - } - continue; - } - - int i; - for (i = 0; dbflags[i].bit; i++) { - if (!strncmp(dbuf.iov_base, dbflags[i].name, dbflags[i].len) && - ((char *)dbuf.iov_base)[dbflags[i].len] == '=') { - if (((char *)dbuf.iov_base)[dbflags[i].len + 1] == '1') - dbi_flags |= dbflags[i].bit; - break; - } - } - if (!dbflags[i].bit) { - ptr = memchr(dbuf.iov_base, '=', dbuf.iov_len); - if (!ptr) { - fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected format\n", prog, - lineno); - exit(EXIT_FAILURE); - } else { - *ptr = '\0'; - fprintf(stderr, - "%s: line %" PRIiSIZE ": unrecognized keyword ignored: %s\n", - prog, lineno, (char *)dbuf.iov_base); - } - } - } - Eof = true; -} - -static void badend(void) { - fprintf(stderr, "%s: line %" PRIiSIZE ": unexpected end of input\n", prog, - lineno); -} - -static int unhex(unsigned char *c2) { - int x, c; - x = *c2++ & 0x4f; - if (x & 0x40) - x -= 55; - c = x << 4; - x = *c2 & 0x4f; - if (x & 0x40) - x -= 55; - c |= x; - return c; -} - -static int readline(MDBX_val *out, MDBX_val *buf) { - unsigned char *c1, *c2, *end; - size_t len, l2; - int c; - - if (!(mode & NOHDR)) { - c = fgetc(stdin); - if (c == EOF) { - Eof = true; - return EOF; - } - if (c != ' ') { - lineno++; - if (fgets(buf->iov_base, (int)buf->iov_len, stdin) == NULL) { - badend: - Eof = true; - badend(); - return EOF; - } - if (c == 'D' && !strncmp(buf->iov_base, "ATA=END", STRLENOF("ATA=END"))) - return EOF; - goto badend; - } - } - if (fgets(buf->iov_base, (int)buf->iov_len, stdin) == NULL) { - Eof = true; - return EOF; - } - lineno++; - - c1 = buf->iov_base; - len = strlen((char *)c1); - l2 = len; - - /* Is buffer too short? */ - while (c1[len - 1] != '\n') { - buf->iov_base = mdbx_realloc(buf->iov_base, buf->iov_len * 2); - if (!buf->iov_base) { - Eof = true; - fprintf(stderr, "%s: line %" PRIiSIZE ": out of memory, line too long\n", - prog, lineno); - return EOF; - } - c1 = buf->iov_base; - c1 += l2; - if (fgets((char *)c1, (int)buf->iov_len + 1, stdin) == NULL) { - Eof = true; - badend(); - return EOF; - } - buf->iov_len *= 2; - len = strlen((char *)c1); - l2 += len; - } - c1 = c2 = buf->iov_base; - len = l2; - c1[--len] = '\0'; - end = c1 + len; - - if (mode & PRINT) { - while (c2 < end) { - if (unlikely(*c2 == '\\')) { - if (c2[1] == '\\') { - *c1++ = '\\'; - } else { - if (c2 + 3 > end || !isxdigit(c2[1]) || !isxdigit(c2[2])) { - Eof = true; - badend(); - return EOF; - } - *c1++ = (char)unhex(++c2); - } - c2 += 2; - } else { - /* copies are redundant when no escapes were used */ - *c1++ = *c2++; - } - } - } else { - /* odd length not allowed */ - if (len & 1) { - Eof = true; - badend(); - return EOF; - } - while (c2 < end) { - if (!isxdigit(*c2) || !isxdigit(c2[1])) { - Eof = true; - badend(); - return EOF; - } - *c1++ = (char)unhex(c2); - c2 += 2; - } - } - c2 = out->iov_base = buf->iov_base; - out->iov_len = c1 - c2; - - return 0; -} - -static void usage(void) { - fprintf(stderr, - "usage: %s [-V] [-q] [-a] [-f file] [-s name] [-N] [-T] [-r] [-n] " - "dbpath\n" - " -V\t\tprint version and exit\n" - " -q\t\tbe quiet\n" - " -a\t\tappend records in input order\n" - " -f file\tread from file instead of stdin\n" - " -s name\tload into named subDB\n" - " -N\t\tuse NOOVERWRITE on puts\n" - " -T\t\tread plaintext\n" - " -r\t\trescure mode (ignore errors to load corrupted DB dump)\n" - " -n\t\tNOSUBDIR mode for open\n", - prog); - exit(EXIT_FAILURE); -} - -static int anyway_greater(const MDBX_val *a, const MDBX_val *b) { - (void)a; - (void)b; - return 1; -} - -int main(int argc, char *argv[]) { - int i, rc; - MDBX_env *env = NULL; - MDBX_txn *txn = NULL; - MDBX_cursor *mc = NULL; - MDBX_dbi dbi; - char *envname = NULL; - int envflags = MDBX_UTTERLY_NOSYNC, putflags = 0; - int append = 0; - int quiet = 0; - int rescue = 0; - MDBX_val prevk; - - prog = argv[0]; - if (argc < 2) - usage(); - - while ((i = getopt(argc, argv, "af:ns:NTVrq")) != EOF) { - switch (i) { - case 'V': - printf("mdbx_load version %d.%d.%d.%d\n" - " - source: %s %s, commit %s, tree %s\n" - " - anchor: %s\n" - " - build: %s for %s by %s\n" - " - flags: %s\n" - " - options: %s\n", - mdbx_version.major, mdbx_version.minor, mdbx_version.release, - mdbx_version.revision, mdbx_version.git.describe, - mdbx_version.git.datetime, mdbx_version.git.commit, - mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, - mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, - mdbx_build.options); - return EXIT_SUCCESS; - case 'a': - append = 1; - break; - case 'f': - if (freopen(optarg, "r", stdin) == NULL) { - fprintf(stderr, "%s: %s: open: %s\n", prog, optarg, - mdbx_strerror(errno)); - exit(EXIT_FAILURE); - } - break; - case 'n': - envflags |= MDBX_NOSUBDIR; - break; - case 's': - subname = mdbx_strdup(optarg); - break; - case 'N': - putflags = MDBX_NOOVERWRITE | MDBX_NODUPDATA; - break; - case 'T': - mode |= NOHDR | PRINT; - break; - case 'q': - quiet = 1; - break; - case 'r': - rescue = 1; - break; - default: - usage(); - } - } - - if (optind != argc - 1) - usage(); - -#if defined(_WIN32) || defined(_WIN64) - SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); -#else -#ifdef SIGPIPE - signal(SIGPIPE, signal_handler); -#endif -#ifdef SIGHUP - signal(SIGHUP, signal_handler); -#endif - signal(SIGINT, signal_handler); - signal(SIGTERM, signal_handler); -#endif /* !WINDOWS */ - - envname = argv[optind]; - if (!quiet) - printf("mdbx_load %s (%s, T-%s)\nRunning for %s...\n", - mdbx_version.git.describe, mdbx_version.git.datetime, - mdbx_version.git.tree, envname); - fflush(NULL); - - dbuf.iov_len = 4096; - dbuf.iov_base = mdbx_malloc(dbuf.iov_len); - - /* read first header for mapsize= */ - if (!(mode & NOHDR)) - readhdr(); - - rc = mdbx_env_create(&env); - if (rc) { - fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc, - mdbx_strerror(rc)); - return EXIT_FAILURE; - } - - mdbx_env_set_maxdbs(env, 2); - -#ifdef MDBX_FIXEDMAP - if (info.mi_mapaddr) - envflags |= MDBX_FIXEDMAP; -#endif - - if (envinfo.mi_mapsize) { - if (envinfo.mi_mapsize > INTPTR_MAX) { - fprintf(stderr, - "Database size is too large for current system (mapsize=%" PRIu64 - " is great than system-limit %zi)\n", - envinfo.mi_mapsize, INTPTR_MAX); - goto env_close; - } - rc = mdbx_env_set_geometry(env, 0, 0, (intptr_t)envinfo.mi_mapsize, -1, -1, - -1); - if (rc) { - fprintf(stderr, "mdbx_env_set_geometry failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - } - - rc = mdbx_env_open(env, envname, envflags, 0664); - if (rc) { - fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - - kbuf.iov_len = mdbx_env_get_maxvalsize_ex(env, MDBX_DUPSORT); - if (kbuf.iov_len >= INTPTR_MAX / 4) { - fprintf(stderr, "mdbx_env_get_maxkeysize failed, returns %zu\n", - kbuf.iov_len); - goto env_close; - } - kbuf.iov_len = (kbuf.iov_len + 1) * 2; - kbuf.iov_base = malloc(kbuf.iov_len * 2); - k0buf.iov_len = kbuf.iov_len; - k0buf.iov_base = (char *)kbuf.iov_base + kbuf.iov_len; - prevk.iov_base = k0buf.iov_base; - - while (!Eof) { - if (user_break) { - rc = MDBX_EINTR; - break; - } - - rc = mdbx_txn_begin(env, NULL, 0, &txn); - if (rc) { - fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - - rc = mdbx_dbi_open_ex(txn, subname, dbi_flags | MDBX_CREATE, &dbi, - append ? anyway_greater : NULL, - append ? anyway_greater : NULL); - if (rc) { - fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto txn_abort; - } - - rc = mdbx_cursor_open(txn, dbi, &mc); - if (rc) { - fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - - int batch = 0; - prevk.iov_len = 0; - while (1) { - MDBX_val key; - rc = readline(&key, &kbuf); - if (rc) /* rc == EOF */ - break; - - MDBX_val data; - rc = readline(&data, &dbuf); - if (rc) { - fprintf(stderr, "%s: line %" PRIiSIZE ": failed to read key value\n", - prog, lineno); - goto txn_abort; - } - - int appflag = 0; - if (append) { - appflag = MDBX_APPEND; - if (dbi_flags & MDBX_DUPSORT) { - if (prevk.iov_len == key.iov_len && - memcmp(prevk.iov_base, key.iov_base, key.iov_len) == 0) - appflag = MDBX_APPEND | MDBX_APPENDDUP; - else - memcpy(prevk.iov_base, key.iov_base, prevk.iov_len = key.iov_len); - } - } - rc = mdbx_cursor_put(mc, &key, &data, putflags | appflag); - if (rc == MDBX_KEYEXIST && putflags) - continue; - if (rc == MDBX_BAD_VALSIZE && rescue) { - fprintf(stderr, "%s: skip line %" PRIiSIZE ": due %s\n", prog, lineno, - mdbx_strerror(rc)); - continue; - } - if (rc) { - fprintf(stderr, "mdbx_cursor_put failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - batch++; - if (batch == 100) { - rc = mdbx_txn_commit(txn); - if (rc) { - fprintf(stderr, "%s: line %" PRIiSIZE ": txn_commit: %s\n", prog, - lineno, mdbx_strerror(rc)); - goto env_close; - } - rc = mdbx_txn_begin(env, NULL, 0, &txn); - if (rc) { - fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - rc = mdbx_cursor_open(txn, dbi, &mc); - if (rc) { - fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - batch = 0; - } - } - rc = mdbx_txn_commit(txn); - txn = NULL; - if (rc) { - fprintf(stderr, "%s: line %" PRIiSIZE ": txn_commit: %s\n", prog, lineno, - mdbx_strerror(rc)); - goto env_close; - } - mdbx_dbi_close(env, dbi); - subname = NULL; - - /* try read next header */ - if (!(mode & NOHDR)) - readhdr(); - } - -txn_abort: - mdbx_txn_abort(txn); -env_close: - mdbx_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/libs/libmdbx/src/src/tools/mdbx_stat.c b/libs/libmdbx/src/src/tools/mdbx_stat.c deleted file mode 100644 index 0867aedac3..0000000000 --- a/libs/libmdbx/src/src/tools/mdbx_stat.c +++ /dev/null @@ -1,445 +0,0 @@ -/* mdbx_stat.c - memory-mapped database status tool */ - -/* - * Copyright 2015-2020 Leonid Yuriev - * and other libmdbx authors: please see AUTHORS file. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted only as authorized by the OpenLDAP - * Public License. - * - * A copy of this license is available in the file LICENSE in the - * top-level directory of the distribution or, alternatively, at - * . */ - -#ifdef _MSC_VER -#if _MSC_VER > 1800 -#pragma warning(disable : 4464) /* relative include path contains '..' */ -#endif -#pragma warning(disable : 4996) /* The POSIX name is deprecated... */ -#endif /* _MSC_VER (warnings) */ - -#define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ -#include "../elements/internals.h" - -#if defined(_WIN32) || defined(_WIN64) -#include "wingetopt.h" - -static volatile BOOL user_break; -static BOOL WINAPI ConsoleBreakHandlerRoutine(DWORD dwCtrlType) { - (void)dwCtrlType; - user_break = true; - return true; -} - -#else /* WINDOWS */ - -static volatile sig_atomic_t user_break; -static void signal_handler(int sig) { - (void)sig; - user_break = 1; -} - -#endif /* !WINDOWS */ - -static void prstat(MDBX_stat *ms) { - printf(" Pagesize: %u\n", ms->ms_psize); - printf(" Tree depth: %u\n", ms->ms_depth); - printf(" Branch pages: %" PRIu64 "\n", ms->ms_branch_pages); - printf(" Leaf pages: %" PRIu64 "\n", ms->ms_leaf_pages); - printf(" Overflow pages: %" PRIu64 "\n", ms->ms_overflow_pages); - printf(" Entries: %" PRIu64 "\n", ms->ms_entries); -} - -static void usage(char *prog) { - fprintf(stderr, - "usage: %s [-V] [-e] [-f[f[f]]] [-r[r]] [-a|-s name] [-n] dbpath\n" - " -V\t\tprint version and exit\n" - " -e\t\tshow whole DB info\n" - " -f\t\tshow GC info\n" - " -r\t\tshow readers\n" - " -a\t\tprint stat of main DB and all subDBs\n" - " \t\t(default) print stat of only the main DB\n" - " -s name\tprint stat of only the named subDB\n" - " -n\t\tNOSUBDIR mode for open\n", - prog); - exit(EXIT_FAILURE); -} - -static int reader_list_func(void *ctx, int num, int slot, mdbx_pid_t pid, - mdbx_tid_t thread, uint64_t txnid, uint64_t lag, - size_t bytes_used, size_t bytes_retained) { - (void)ctx; - if (num == 1) - printf("Reader Table\n" - " #\tslot\t%6s %*s %20s %10s %13s %13s\n", - "pid", (int)sizeof(size_t) * 2, "thread", "txnid", "lag", "used", - "retained"); - - printf(" %3d)\t[%d]\t%6" PRIdSIZE " %*" PRIxSIZE, num, slot, (size_t)pid, - (int)sizeof(size_t) * 2, (size_t)thread); - if (txnid) - printf(" %20" PRIu64 " %10" PRIu64 " %12.1fM %12.1fM\n", txnid, lag, - bytes_used / 1048576.0, bytes_retained / 1048576.0); - else - printf(" %20s %10s %13s %13s\n", "-", "0", "0", "0"); - - return user_break ? MDBX_RESULT_TRUE : MDBX_RESULT_FALSE; -} - -int main(int argc, char *argv[]) { - int o, rc; - MDBX_env *env; - MDBX_txn *txn; - MDBX_dbi dbi; - MDBX_stat mst; - MDBX_envinfo mei; - char *prog = argv[0]; - char *envname; - char *subname = NULL; - int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0; - - if (argc < 2) - usage(prog); - - while ((o = getopt(argc, argv, "Vaefnrs:")) != EOF) { - switch (o) { - case 'V': - printf("mdbx_stat version %d.%d.%d.%d\n" - " - source: %s %s, commit %s, tree %s\n" - " - anchor: %s\n" - " - build: %s for %s by %s\n" - " - flags: %s\n" - " - options: %s\n", - mdbx_version.major, mdbx_version.minor, mdbx_version.release, - mdbx_version.revision, mdbx_version.git.describe, - mdbx_version.git.datetime, mdbx_version.git.commit, - mdbx_version.git.tree, mdbx_sourcery_anchor, mdbx_build.datetime, - mdbx_build.target, mdbx_build.compiler, mdbx_build.flags, - mdbx_build.options); - return EXIT_SUCCESS; - case 'a': - if (subname) - usage(prog); - alldbs++; - break; - case 'e': - envinfo++; - break; - case 'f': - freinfo++; - break; - case 'n': - envflags |= MDBX_NOSUBDIR; - break; - case 'r': - rdrinfo++; - break; - case 's': - if (alldbs) - usage(prog); - subname = optarg; - break; - default: - usage(prog); - } - } - - if (optind != argc - 1) - usage(prog); - -#if defined(_WIN32) || defined(_WIN64) - SetConsoleCtrlHandler(ConsoleBreakHandlerRoutine, true); -#else -#ifdef SIGPIPE - signal(SIGPIPE, signal_handler); -#endif -#ifdef SIGHUP - signal(SIGHUP, signal_handler); -#endif - signal(SIGINT, signal_handler); - signal(SIGTERM, signal_handler); -#endif /* !WINDOWS */ - - envname = argv[optind]; - envname = argv[optind]; - printf("mdbx_stat %s (%s, T-%s)\nRunning for %s...\n", - mdbx_version.git.describe, mdbx_version.git.datetime, - mdbx_version.git.tree, envname); - fflush(NULL); - - rc = mdbx_env_create(&env); - if (rc) { - fprintf(stderr, "mdbx_env_create failed, error %d %s\n", rc, - mdbx_strerror(rc)); - return EXIT_FAILURE; - } - - if (alldbs || subname) - mdbx_env_set_maxdbs(env, 4); - - rc = mdbx_env_open(env, envname, envflags | MDBX_RDONLY, 0664); - if (rc) { - fprintf(stderr, "mdbx_env_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - - rc = mdbx_txn_begin(env, NULL, MDBX_RDONLY, &txn); - if (rc) { - fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - - if (envinfo || freinfo) { - (void)mdbx_env_info_ex(env, txn, &mei, sizeof(mei)); - } else { - /* LY: zap warnings from gcc */ - memset(&mei, 0, sizeof(mei)); - } - - if (envinfo) { - (void)mdbx_env_stat_ex(env, txn, &mst, sizeof(mst)); - printf("Environment Info\n"); - printf(" Pagesize: %u\n", mst.ms_psize); - if (mei.mi_geo.lower != mei.mi_geo.upper) { - printf(" Dynamic datafile: %" PRIu64 "..%" PRIu64 " bytes (+%" PRIu64 - "/-%" PRIu64 "), %" PRIu64 "..%" PRIu64 " pages (+%" PRIu64 - "/-%" PRIu64 ")\n", - mei.mi_geo.lower, mei.mi_geo.upper, mei.mi_geo.grow, - mei.mi_geo.shrink, mei.mi_geo.lower / mst.ms_psize, - mei.mi_geo.upper / mst.ms_psize, mei.mi_geo.grow / mst.ms_psize, - mei.mi_geo.shrink / mst.ms_psize); - printf(" Current mapsize: %" PRIu64 " bytes, %" PRIu64 " pages \n", - mei.mi_mapsize, mei.mi_mapsize / mst.ms_psize); - printf(" Current datafile: %" PRIu64 " bytes, %" PRIu64 " pages\n", - mei.mi_geo.current, mei.mi_geo.current / mst.ms_psize); -#if defined(_WIN32) || defined(_WIN64) - if (mei.mi_geo.shrink && mei.mi_geo.current != mei.mi_geo.upper) - printf(" WARNING: Due Windows system limitations a " - "file couldn't\n be truncated while database " - "is opened. So, the size of\n database file " - "may by large than the database itself,\n " - "until it will be closed or reopened in read-write mode.\n"); -#endif - } else { - printf(" Fixed datafile: %" PRIu64 " bytes, %" PRIu64 " pages\n", - mei.mi_geo.current, mei.mi_geo.current / mst.ms_psize); - } - printf(" Last transaction ID: %" PRIu64 "\n", mei.mi_recent_txnid); - printf(" Latter reader transaction ID: %" PRIu64 " (%" PRIi64 ")\n", - mei.mi_latter_reader_txnid, - mei.mi_latter_reader_txnid - mei.mi_recent_txnid); - printf(" Max readers: %u\n", mei.mi_maxreaders); - printf(" Number of reader slots uses: %u\n", mei.mi_numreaders); - } else { - /* LY: zap warnings from gcc */ - memset(&mst, 0, sizeof(mst)); - } - - if (rdrinfo) { - rc = mdbx_reader_list(env, reader_list_func, nullptr); - if (rc == MDBX_RESULT_TRUE) - printf("Reader Table is empty\n"); - else if (rc == MDBX_SUCCESS && rdrinfo > 1) { - int dead; - rc = mdbx_reader_check(env, &dead); - if (rc == MDBX_RESULT_TRUE) { - printf(" %d stale readers cleared.\n", dead); - rc = mdbx_reader_list(env, reader_list_func, nullptr); - if (rc == MDBX_RESULT_TRUE) - printf(" Now Reader Table is empty\n"); - } else - printf(" No stale readers.\n"); - } - if (MDBX_IS_ERROR(rc)) { - fprintf(stderr, "mdbx_txn_begin failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto env_close; - } - if (!(subname || alldbs || freinfo)) - goto env_close; - } - - if (freinfo) { - MDBX_cursor *cursor; - MDBX_val key, data; - pgno_t pages = 0, *iptr; - pgno_t reclaimable = 0; - - printf("Garbage Collection\n"); - dbi = 0; - rc = mdbx_cursor_open(txn, dbi, &cursor); - if (rc) { - fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - rc = mdbx_dbi_stat(txn, dbi, &mst, sizeof(mst)); - if (rc) { - fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - prstat(&mst); - while ((rc = mdbx_cursor_get(cursor, &key, &data, MDBX_NEXT)) == - MDBX_SUCCESS) { - if (user_break) { - rc = MDBX_EINTR; - break; - } - iptr = data.iov_base; - const pgno_t number = *iptr++; - - pages += number; - if (envinfo && mei.mi_latter_reader_txnid > *(size_t *)key.iov_base) - reclaimable += number; - - if (freinfo > 1) { - char *bad = ""; - pgno_t prev = - MDBX_PNL_ASCENDING ? NUM_METAS - 1 : (pgno_t)mei.mi_last_pgno + 1; - pgno_t span = 1; - for (unsigned i = 0; i < number; ++i) { - pgno_t pg = iptr[i]; - if (MDBX_PNL_DISORDERED(prev, pg)) - bad = " [bad sequence]"; - prev = pg; - while (i + span < number && - iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pg, span) - : pgno_sub(pg, span))) - ++span; - } - printf(" Transaction %" PRIaTXN ", %" PRIaPGNO - " pages, maxspan %" PRIaPGNO "%s\n", - *(txnid_t *)key.iov_base, number, span, bad); - if (freinfo > 2) { - for (unsigned i = 0; i < number; i += span) { - const pgno_t pg = iptr[i]; - for (span = 1; - i + span < number && - iptr[i + span] == (MDBX_PNL_ASCENDING ? pgno_add(pg, span) - : pgno_sub(pg, span)); - ++span) - ; - if (span > 1) - printf(" %9" PRIaPGNO "[%" PRIaPGNO "]\n", pg, span); - else - printf(" %9" PRIaPGNO "\n", pg); - } - } - } - } - mdbx_cursor_close(cursor); - - switch (rc) { - case MDBX_SUCCESS: - case MDBX_NOTFOUND: - break; - case MDBX_EINTR: - fprintf(stderr, "Interrupted by signal/user\n"); - goto txn_abort; - default: - fprintf(stderr, "mdbx_cursor_get failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - - if (envinfo) { - uint64_t value = mei.mi_mapsize / mst.ms_psize; - double percent = value / 100.0; - printf("Page Usage\n"); - printf(" Total: %" PRIu64 " 100%%\n", value); - - value = mei.mi_geo.current / mst.ms_psize; - printf(" Backed: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = mei.mi_last_pgno + 1; - printf(" Allocated: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = mei.mi_mapsize / mst.ms_psize - (mei.mi_last_pgno + 1); - printf(" Remained: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = mei.mi_last_pgno + 1 - pages; - printf(" Used: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = pages; - printf(" GC: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = pages - reclaimable; - printf(" Detained: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = reclaimable; - printf(" Reclaimable: %" PRIu64 " %.1f%%\n", value, value / percent); - - value = - mei.mi_mapsize / mst.ms_psize - (mei.mi_last_pgno + 1) + reclaimable; - printf(" Available: %" PRIu64 " %.1f%%\n", value, value / percent); - } else - printf(" GC: %" PRIaPGNO " pages\n", pages); - } - - rc = mdbx_dbi_open(txn, subname, 0, &dbi); - if (rc) { - fprintf(stderr, "mdbx_open failed, error %d %s\n", rc, mdbx_strerror(rc)); - goto txn_abort; - } - - rc = mdbx_dbi_stat(txn, dbi, &mst, sizeof(mst)); - if (rc) { - fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - printf("Status of %s\n", subname ? subname : "Main DB"); - prstat(&mst); - - if (alldbs) { - MDBX_cursor *cursor; - MDBX_val key; - - rc = mdbx_cursor_open(txn, dbi, &cursor); - if (rc) { - fprintf(stderr, "mdbx_cursor_open failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - while ((rc = mdbx_cursor_get(cursor, &key, NULL, MDBX_NEXT_NODUP)) == 0) { - char *str; - MDBX_dbi db2; - if (memchr(key.iov_base, '\0', key.iov_len)) - continue; - str = mdbx_malloc(key.iov_len + 1); - memcpy(str, key.iov_base, key.iov_len); - str[key.iov_len] = '\0'; - rc = mdbx_dbi_open(txn, str, 0, &db2); - if (rc == MDBX_SUCCESS) - printf("Status of %s\n", str); - mdbx_free(str); - if (rc) - continue; - rc = mdbx_dbi_stat(txn, db2, &mst, sizeof(mst)); - if (rc) { - fprintf(stderr, "mdbx_dbi_stat failed, error %d %s\n", rc, - mdbx_strerror(rc)); - goto txn_abort; - } - prstat(&mst); - mdbx_dbi_close(env, db2); - } - mdbx_cursor_close(cursor); - } - - if (rc == MDBX_NOTFOUND) - rc = MDBX_SUCCESS; - - mdbx_dbi_close(env, dbi); -txn_abort: - mdbx_txn_abort(txn); -env_close: - mdbx_env_close(env); - - return rc ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/libs/libmdbx/src/src/tools/wingetopt.c b/libs/libmdbx/src/src/tools/wingetopt.c deleted file mode 100644 index 7feb223fc1..0000000000 --- a/libs/libmdbx/src/src/tools/wingetopt.c +++ /dev/null @@ -1,95 +0,0 @@ -/* - * POSIX getopt for Windows - * - * AT&T Public License - * - * Code given out at the 1985 UNIFORUM conference in Dallas. - */ - -/*----------------------------------------------------------------------------*/ -/* Microsoft compiler generates a lot of warning for self includes... */ - -#ifdef _MSC_VER -#pragma warning(push, 1) -#pragma warning(disable : 4548) /* expression before comma has no effect; \ - expected expression with side - effect */ -#pragma warning(disable : 4530) /* C++ exception handler used, but unwind \ - * semantics are not enabled. Specify /EHsc */ -#pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \ - * mode specified; termination on exception is \ - * not guaranteed. Specify /EHsc */ -#if !defined(_CRT_SECURE_NO_WARNINGS) -#define _CRT_SECURE_NO_WARNINGS -#endif -#endif /* _MSC_VER (warnings) */ - -#include "wingetopt.h" -#include -#include - -#ifdef _MSC_VER -#pragma warning(pop) -#endif -/*----------------------------------------------------------------------------*/ - -#ifndef NULL -#define NULL 0 -#endif - -#ifndef EOF -#define EOF (-1) -#endif - -#define ERR(s, c) \ - if (opterr) { \ - fputs(argv[0], stderr); \ - fputs(s, stderr); \ - fputc(c, stderr); \ - } - -int opterr = 1; -int optind = 1; -int optopt; -char *optarg; - -int getopt(int argc, char *const argv[], const char *opts) { - static int sp = 1; - int c; - const char *cp; - - if (sp == 1) { - if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0') - return EOF; - else if (strcmp(argv[optind], "--") == 0) { - optind++; - return EOF; - } - } - optopt = c = argv[optind][sp]; - if (c == ':' || (cp = strchr(opts, c)) == NULL) { - ERR(": illegal option -- ", c); - if (argv[optind][++sp] == '\0') { - optind++; - sp = 1; - } - return '?'; - } - if (*++cp == ':') { - if (argv[optind][sp + 1] != '\0') - optarg = &argv[optind++][sp + 1]; - else if (++optind >= argc) { - ERR(": option requires an argument -- ", c); - sp = 1; - return '?'; - } else - optarg = argv[optind++]; - sp = 1; - } else { - if (argv[optind][++sp] == '\0') { - sp = 1; - optind++; - } - optarg = NULL; - } - return c; -} diff --git a/libs/libmdbx/src/src/tools/wingetopt.h b/libs/libmdbx/src/src/tools/wingetopt.h deleted file mode 100644 index d328e38ccc..0000000000 --- a/libs/libmdbx/src/src/tools/wingetopt.h +++ /dev/null @@ -1,30 +0,0 @@ -/* - * POSIX getopt for Windows - * - * AT&T Public License - * - * Code given out at the 1985 UNIFORUM conference in Dallas. - */ - -#ifndef _WINGETOPT_H_ -#define _WINGETOPT_H_ - -/* Bit of madness for Windows console */ -#define mdbx_strerror mdbx_strerror_ANSI2OEM -#define mdbx_strerror_r mdbx_strerror_r_ANSI2OEM - -#ifdef __cplusplus -extern "C" { -#endif - -extern int opterr; -extern int optind; -extern int optopt; -extern char *optarg; -int getopt(int argc, char *const argv[], const char *optstring); - -#ifdef __cplusplus -} -#endif - -#endif /* _GETOPT_H_ */ diff --git a/libs/libmdbx/src/src/version.c.in b/libs/libmdbx/src/src/version.c.in new file mode 100644 index 0000000000..2854bd5d9d --- /dev/null +++ b/libs/libmdbx/src/src/version.c.in @@ -0,0 +1,46 @@ +/* This is CMake-template for libmdbx's version.c + ******************************************************************************/ + +#include "internals.h" + +#if MDBX_VERSION_MAJOR != ${MDBX_VERSION_MAJOR} || \ + MDBX_VERSION_MINOR != ${MDBX_VERSION_MINOR} +#error "API version mismatch! Had `git fetch --tags` done?" +#endif + +static const char sourcery[] = STRINGIFY(MDBX_BUILD_SOURCERY); + +__dll_export +#ifdef __attribute_used__ + __attribute_used__ +#elif defined(__GNUC__) || __has_attribute(__used__) + __attribute__((__used__)) +#endif +#ifdef __attribute_externally_visible__ + __attribute_externally_visible__ +#elif (defined(__GNUC__) && !defined(__clang__)) || \ + __has_attribute(__externally_visible__) + __attribute__((__externally_visible__)) +#endif + const mdbx_version_info mdbx_version = { + ${MDBX_VERSION_MAJOR}, + ${MDBX_VERSION_MINOR}, + ${MDBX_VERSION_RELEASE}, + ${MDBX_VERSION_REVISION}, + {"@MDBX_GIT_TIMESTAMP@", "@MDBX_GIT_TREE@", "@MDBX_GIT_COMMIT@", + "@MDBX_GIT_DESCRIBE@"}, + sourcery}; + +__dll_export +#ifdef __attribute_used__ + __attribute_used__ +#elif defined(__GNUC__) || __has_attribute(__used__) + __attribute__((__used__)) +#endif +#ifdef __attribute_externally_visible__ + __attribute_externally_visible__ +#elif (defined(__GNUC__) && !defined(__clang__)) || \ + __has_attribute(__externally_visible__) + __attribute__((__externally_visible__)) +#endif + const char *const mdbx_sourcery_anchor = sourcery; diff --git a/libs/libmdbx/src/src/wingetopt.c b/libs/libmdbx/src/src/wingetopt.c new file mode 100644 index 0000000000..7feb223fc1 --- /dev/null +++ b/libs/libmdbx/src/src/wingetopt.c @@ -0,0 +1,95 @@ +/* + * POSIX getopt for Windows + * + * AT&T Public License + * + * Code given out at the 1985 UNIFORUM conference in Dallas. + */ + +/*----------------------------------------------------------------------------*/ +/* Microsoft compiler generates a lot of warning for self includes... */ + +#ifdef _MSC_VER +#pragma warning(push, 1) +#pragma warning(disable : 4548) /* expression before comma has no effect; \ + expected expression with side - effect */ +#pragma warning(disable : 4530) /* C++ exception handler used, but unwind \ + * semantics are not enabled. Specify /EHsc */ +#pragma warning(disable : 4577) /* 'noexcept' used with no exception handling \ + * mode specified; termination on exception is \ + * not guaranteed. Specify /EHsc */ +#if !defined(_CRT_SECURE_NO_WARNINGS) +#define _CRT_SECURE_NO_WARNINGS +#endif +#endif /* _MSC_VER (warnings) */ + +#include "wingetopt.h" +#include +#include + +#ifdef _MSC_VER +#pragma warning(pop) +#endif +/*----------------------------------------------------------------------------*/ + +#ifndef NULL +#define NULL 0 +#endif + +#ifndef EOF +#define EOF (-1) +#endif + +#define ERR(s, c) \ + if (opterr) { \ + fputs(argv[0], stderr); \ + fputs(s, stderr); \ + fputc(c, stderr); \ + } + +int opterr = 1; +int optind = 1; +int optopt; +char *optarg; + +int getopt(int argc, char *const argv[], const char *opts) { + static int sp = 1; + int c; + const char *cp; + + if (sp == 1) { + if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0') + return EOF; + else if (strcmp(argv[optind], "--") == 0) { + optind++; + return EOF; + } + } + optopt = c = argv[optind][sp]; + if (c == ':' || (cp = strchr(opts, c)) == NULL) { + ERR(": illegal option -- ", c); + if (argv[optind][++sp] == '\0') { + optind++; + sp = 1; + } + return '?'; + } + if (*++cp == ':') { + if (argv[optind][sp + 1] != '\0') + optarg = &argv[optind++][sp + 1]; + else if (++optind >= argc) { + ERR(": option requires an argument -- ", c); + sp = 1; + return '?'; + } else + optarg = argv[optind++]; + sp = 1; + } else { + if (argv[optind][++sp] == '\0') { + sp = 1; + optind++; + } + optarg = NULL; + } + return c; +} diff --git a/libs/libmdbx/src/src/wingetopt.h b/libs/libmdbx/src/src/wingetopt.h new file mode 100644 index 0000000000..d328e38ccc --- /dev/null +++ b/libs/libmdbx/src/src/wingetopt.h @@ -0,0 +1,30 @@ +/* + * POSIX getopt for Windows + * + * AT&T Public License + * + * Code given out at the 1985 UNIFORUM conference in Dallas. + */ + +#ifndef _WINGETOPT_H_ +#define _WINGETOPT_H_ + +/* Bit of madness for Windows console */ +#define mdbx_strerror mdbx_strerror_ANSI2OEM +#define mdbx_strerror_r mdbx_strerror_r_ANSI2OEM + +#ifdef __cplusplus +extern "C" { +#endif + +extern int opterr; +extern int optind; +extern int optopt; +extern char *optarg; +int getopt(int argc, char *const argv[], const char *optstring); + +#ifdef __cplusplus +} +#endif + +#endif /* _GETOPT_H_ */ diff --git a/libs/libmdbx/src/test/CMakeLists.txt b/libs/libmdbx/src/test/CMakeLists.txt index 0cc22182c9..2014cb57fa 100644 --- a/libs/libmdbx/src/test/CMakeLists.txt +++ b/libs/libmdbx/src/test/CMakeLists.txt @@ -1,9 +1,3 @@ -if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") - set(TEST_OSAL windows) -else() - set(TEST_OSAL unix) -endif() - add_executable(mdbx_test base.h cases.cc @@ -21,7 +15,8 @@ add_executable(mdbx_test log.h main.cc osal.h - osal-${TEST_OSAL}.cc + osal-unix.cc + osal-windows.cc test.cc test.h try.cc @@ -35,19 +30,15 @@ add_executable(mdbx_test set_target_properties(mdbx_test PROPERTIES INTERPROCEDURAL_OPTIMIZATION $ CXX_STANDARD 17 CXX_STANDARD_REQUIRED ON) +target_setup_options(mdbx_test) -if(CC_HAS_FASTMATH) - target_compile_options(mdbx_test PRIVATE "-ffast-math") -endif() -if(CC_HAS_VISIBILITY AND (LTO_ENABLED OR INTERPROCEDURAL_OPTIMIZATION)) - set_target_properties(mdbx_test PROPERTIES LINK_FLAGS "-fvisibility=hidden") -endif() - -target_link_libraries(mdbx_test mdbx ${LIB_MATH} ${CMAKE_THREAD_LIBS_INIT}) +target_link_libraries(mdbx_test ${TOOL_MDBX_LIB} ${LIB_MATH} ${CMAKE_THREAD_LIBS_INIT}) if(${CMAKE_SYSTEM_NAME} STREQUAL "Windows") target_link_libraries(mdbx_test winmm.lib) endif() if(UNIX AND NOT SUBPROJECT) - add_subdirectory(pcrf) + add_executable(pcrf_test pcrf/pcrf_test.c) + target_include_directories(pcrf_test PRIVATE "${PROJECT_SOURCE_DIR}") + target_link_libraries(pcrf_test ${TOOL_MDBX_LIB}) endif() diff --git a/libs/libmdbx/src/test/base.h b/libs/libmdbx/src/test/base.h index 01cf171455..7fc6cac68c 100644 --- a/libs/libmdbx/src/test/base.h +++ b/libs/libmdbx/src/test/base.h @@ -84,14 +84,14 @@ #define MDBX_INTERNAL_VAR extern #define MDBX_TOOLS /* Avoid using internal mdbx_assert() */ #include "../mdbx.h" -#include "../src/elements/defs.h" -#include "../src/elements/osal.h" +#include "../src/defs.h" +#include "../src/osal.h" #if !defined(__thread) && (defined(_MSC_VER) || defined(__DMC__)) #define __thread __declspec(thread) #endif /* __thread */ -#include "../src/elements/options.h" +#include "../src/options.h" #ifdef _MSC_VER #pragma warning(pop) diff --git a/libs/libmdbx/src/test/osal-unix.cc b/libs/libmdbx/src/test/osal-unix.cc index edc3e91a48..dc0774063a 100644 --- a/libs/libmdbx/src/test/osal-unix.cc +++ b/libs/libmdbx/src/test/osal-unix.cc @@ -14,6 +14,8 @@ #include "test.h" +#if !(defined(_WIN32) || defined(_WIN64)) + #include #include #include @@ -529,3 +531,5 @@ std::string osal_tempdir(void) { int osal_removefile(const std::string &pathname) { return unlink(pathname.c_str()) ? errno : MDBX_SUCCESS; } + +#endif /* !Windows */ diff --git a/libs/libmdbx/src/test/osal-windows.cc b/libs/libmdbx/src/test/osal-windows.cc index 6de674651b..9bde047a2c 100644 --- a/libs/libmdbx/src/test/osal-windows.cc +++ b/libs/libmdbx/src/test/osal-windows.cc @@ -1,5 +1,5 @@ /* - * Copyright 2017-2019 Leonid Yuriev + * Copyright 2017-2020 Leonid Yuriev * and other libmdbx authors: please see AUTHORS file. * All rights reserved. * @@ -14,6 +14,8 @@ #include "test.h" +#if defined(_WIN32) || defined(_WIN64) + static std::unordered_map events; static HANDLE hBarrierSemaphore, hBarrierEvent; static HANDLE hProgressActiveEvent, hProgressPassiveEvent; @@ -422,16 +424,10 @@ void osal_udelay(unsigned us) { static unsigned threshold_us; if (threshold_us == 0) { -#if 1 unsigned timeslice_ms = 1; while (timeBeginPeriod(timeslice_ms) == TIMERR_NOCANDO) ++timeslice_ms; threshold_us = timeslice_ms * 1500u; -#else - ULONGLONG InterruptTimePrecise_100ns; - QueryInterruptTimePrecise(&InterruptTimePrecise_100ns); - threshold_us = InterruptTimePrecise_100ns / 5; -#endif assert(threshold_us > 0); } @@ -459,3 +455,5 @@ std::string osal_tempdir(void) { int osal_removefile(const std::string &pathname) { return DeleteFileA(pathname.c_str()) ? MDBX_SUCCESS : GetLastError(); } + +#endif /* Windows */ diff --git a/libs/libmdbx/src/test/pcrf/CMakeLists.txt b/libs/libmdbx/src/test/pcrf/CMakeLists.txt deleted file mode 100644 index 8bd3e3d859..0000000000 --- a/libs/libmdbx/src/test/pcrf/CMakeLists.txt +++ /dev/null @@ -1,5 +0,0 @@ -set(TARGET pcrf_test) -add_executable(${TARGET} pcrf_test.c) -target_include_directories(${TARGET} PRIVATE "${PROJECT_SOURCE_DIR}") -target_link_libraries(${TARGET} mdbx) - diff --git a/libs/libmdbx/src/version.c b/libs/libmdbx/src/version.c new file mode 100644 index 0000000000..d6b952761e --- /dev/null +++ b/libs/libmdbx/src/version.c @@ -0,0 +1,46 @@ +/* This is CMake-template for libmdbx's version.c + ******************************************************************************/ + +#include "src/internals.h" + +#if MDBX_VERSION_MAJOR != 0 || \ + MDBX_VERSION_MINOR != 7 +#error "API version mismatch! Had `git fetch --tags` done?" +#endif + +static const char sourcery[] = STRINGIFY(MDBX_BUILD_SOURCERY); + +__dll_export +#ifdef __attribute_used__ + __attribute_used__ +#elif defined(__GNUC__) || __has_attribute(__used__) + __attribute__((__used__)) +#endif +#ifdef __attribute_externally_visible__ + __attribute_externally_visible__ +#elif (defined(__GNUC__) && !defined(__clang__)) || \ + __has_attribute(__externally_visible__) + __attribute__((__externally_visible__)) +#endif + const mdbx_version_info mdbx_version = { + 0, + 7, + 0, + 1981, + {"2020-04-25T11:12:23+03:00", "5c78012e38f306d9601e1f43109c8aecbacb2e14", "ca8fa31c3fe1b4d92278d7a54364f6fb73dbae04", + "v0.7.0-39-gca8fa31"}, + sourcery}; + +__dll_export +#ifdef __attribute_used__ + __attribute_used__ +#elif defined(__GNUC__) || __has_attribute(__used__) + __attribute__((__used__)) +#endif +#ifdef __attribute_externally_visible__ + __attribute_externally_visible__ +#elif (defined(__GNUC__) && !defined(__clang__)) || \ + __has_attribute(__externally_visible__) + __attribute__((__externally_visible__)) +#endif + const char *const mdbx_sourcery_anchor = sourcery; -- cgit v1.2.3