diff options
Diffstat (limited to 'plugins/Dbx_mdbx/src/libmdbx/mdbx.c')
| -rw-r--r-- | plugins/Dbx_mdbx/src/libmdbx/mdbx.c | 28388 |
1 files changed, 0 insertions, 28388 deletions
diff --git a/plugins/Dbx_mdbx/src/libmdbx/mdbx.c b/plugins/Dbx_mdbx/src/libmdbx/mdbx.c deleted file mode 100644 index 6ceafe5097..0000000000 --- a/plugins/Dbx_mdbx/src/libmdbx/mdbx.c +++ /dev/null @@ -1,28388 +0,0 @@ -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru> - * 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 - * <http://www.OpenLDAP.org/license.html>. */ - -#define MDBX_ALLOY 1 -#define MDBX_BUILD_SOURCERY 37ec6726f69ef69c4e52fcfb87d700f44f37246b1b635f455d2a429776a8eec6_v0_9_2_136_g9f0ff86 -#ifdef MDBX_CONFIG_H -#include MDBX_CONFIG_H -#endif - -#define LIBMDBX_INTERNALS -#ifdef MDBX_TOOLS -#define MDBX_DEPRECATED -#endif /* MDBX_TOOLS */ - -/* *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__)) && !defined(_GNU_SOURCE) -#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_FULL_VER < 190024234 - /* Actually libmdbx was not tested with compilers older than 19.00.24234 (Visual Studio 2015 Update 3). - * 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. - */ -# error "At least \"Microsoft C/C++ Compiler\" version 19.00.24234 (Visual Studio 2015 Update 3) 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 alignment */ -#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 */ -#pragma warning(disable : 4204) /* nonstandard extension used: non-constant aggregate initializer */ -#pragma warning(disable : 4505) /* unreferenced local function has been removed */ -#endif /* _MSC_VER (warnings) */ - -#include "mdbx.h" -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru> - * 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 - * <http://www.OpenLDAP.org/license.html>. - */ - -/* *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_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 */ - -#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 defined(__cplusplus) && (__has_cpp_attribute(fallthrough) && \ - (!defined(__clang__) || __clang__ > 4)) || __cplusplus >= 201703L -# define __fallthrough [[fallthrough]] -# elif __GNUC_PREREQ(8, 0) && defined(__cplusplus) && __cplusplus >= 201103L -# define __fallthrough [[fallthrough]] -# elif __GNUC_PREREQ(7, 0) && \ - (!defined(__LCC__) || (__LCC__ == 124 && __LCC_MINOR__ >= 12) || \ - (__LCC__ == 125 && __LCC_MINOR__ >= 5) || (__LCC__ >= 126)) -# define __fallthrough __attribute__((__fallthrough__)) -# elif defined(__clang__) && defined(__cplusplus) && __cplusplus >= 201103L &&\ - __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough") -# define __fallthrough [[clang::fallthrough]] -# else -# define __fallthrough -# 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 __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 __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 __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* MDBX_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 <valgrind/memcheck.h> -# 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 <sanitizer/asan_interface.h> -#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 <typename T, size_t N> - 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(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) -# elif defined(_MSC_VER) -# include <crtdbg.h> -# define STATIC_ASSERT_MSG(expr, msg) _STATIC_ASSERT(expr) -# elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \ - || __has_feature(c_static_assert) -# define STATIC_ASSERT_MSG(expr, msg) _Static_assert(expr, msg) -# 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 */ - -#if defined(__GNUC__) && !__GNUC_PREREQ(4,2) - /* Actually libmdbx was not tested with compilers older than GCC 4.2. - * But you could ignore this warning 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) - /* Actually libmdbx was not tested with CLANG older than 3.8. - * But you could ignore this warning 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) - /* Actually libmdbx was not tested with something older than glibc 2.12. - * But you could ignore this warning at your own risk. - * In such case please don't rise up an issues related ONLY to old systems. - */ -# warning "libmdbx was only tested with 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("-Wnested-anon-types") -# if defined(__clang__) -# pragma clang diagnostic ignored "-Wnested-anon-types" -# elif defined(__GNUC__) -# pragma GCC diagnostic ignored "-Wnested-anon-types" -# else -# pragma warning disable "nested-anon-types" -# endif -#endif /* -Wnested-anon-types */ - -#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 */ - -#ifdef __cplusplus -extern "C" { -#endif - -/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ - -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru> - * 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 - * <http://www.OpenLDAP.org/license.html>. - */ - - -/*----------------------------------------------------------------------------*/ -/* 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) && MDBX_AVOID_CRT -#define _NO_CRT_STDIO_INLINE -#endif -#elif !defined(_POSIX_C_SOURCE) -#define _POSIX_C_SOURCE 200809L -#endif /* Windows */ - -/*----------------------------------------------------------------------------*/ -/* C99 includes */ -#include <inttypes.h> -#include <stddef.h> -#include <stdint.h> -#include <stdlib.h> - -#include <assert.h> -#include <fcntl.h> -#include <limits.h> -#include <stdio.h> -#include <string.h> -#include <time.h> - -/* C11 stdalign.h */ -#if __has_include(<stdalign.h>) -#include <stdalign.h> -#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 <TargetConditionals.h> -#endif /* Apple OSX & iOS */ - -#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ - defined(__BSD__) || defined(__bsdi__) || defined(__DragonFly__) || \ - defined(__APPLE__) || defined(__MACH__) -#include <sys/cdefs.h> -#include <sys/mount.h> -#include <sys/sysctl.h> -#include <sys/types.h> -#if defined(__FreeBSD__) || defined(__DragonFly__) -#include <vm/vm_param.h> -#elif defined(__OpenBSD__) || defined(__NetBSD__) -#include <uvm/uvm_param.h> -#else -#define SYSCTL_LEGACY_NONCONST_MIB -#endif -#ifndef __MACH__ -#include <sys/vmmeter.h> -#endif -#else -#include <malloc.h> -#if !(defined(__sun) || defined(__SVR4) || defined(__svr4__) || \ - defined(_WIN32) || defined(_WIN64)) -#include <mntent.h> -#endif /* !Solaris */ -#endif /* !xBSD */ - -#if defined(__FreeBSD__) || __has_include(<malloc_np.h>) -#include <malloc_np.h> -#endif - -#if defined(__APPLE__) || defined(__MACH__) || __has_include(<malloc/malloc.h>) -#include <malloc/malloc.h> -#endif /* MacOS */ - -#if defined(__MACH__) -#include <mach/host_info.h> -#include <mach/mach_host.h> -#include <mach/mach_port.h> -#include <uuid/uuid.h> -#undef P_DIRTY -#endif - -#if defined(__linux__) || defined(__gnu_linux__) -#include <linux/sysctl.h> -#include <sched.h> -#include <sys/sendfile.h> -#include <sys/statfs.h> -#endif /* Linux */ - -#ifndef _XOPEN_SOURCE -#define _XOPEN_SOURCE 0 -#endif - -#ifndef _XOPEN_SOURCE_EXTENDED -#define _XOPEN_SOURCE_EXTENDED 0 -#else -#include <utmpx.h> -#endif /* _XOPEN_SOURCE_EXTENDED */ - -#if defined(__sun) || defined(__SVR4) || defined(__svr4__) -#include <kstat.h> -#include <sys/mnttab.h> -/* 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 <excpt.h> -#include <tlhelp32.h> -#include <windows.h> -#include <winnt.h> -#include <winternl.h> -#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[2]; -} mdbx_condpair_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 ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE) - : LocalAlloc(LMEM_FIXED, bytes); -} -#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 <pthread.h> -#include <semaphore.h> -#include <signal.h> -#include <sys/file.h> -#include <sys/ipc.h> -#include <sys/mman.h> -#include <sys/param.h> -#include <sys/stat.h> -#include <sys/statvfs.h> -#include <sys/uio.h> -#include <unistd.h> -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[2]; -} mdbx_condpair_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 <android/log.h> -#if __ANDROID_API__ >= 21 -#include <sys/sendfile.h> -#endif -#endif /* Android */ - -/* *INDENT-OFF* */ -/* clang-format off */ -#if defined(HAVE_SYS_STAT_H) || __has_include(<sys/stat.h>) -#include <sys/stat.h> -#endif -#if defined(HAVE_SYS_TYPES_H) || __has_include(<sys/types.h>) -#include <sys/types.h> -#endif -#if defined(HAVE_SYS_FILE_H) || __has_include(<sys/file.h>) -#include <sys/file.h> -#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 */ -#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 <intrin.h> -#elif __GNUC_PREREQ(4, 4) || defined(__clang__) -#if defined(__ia32__) || defined(__e2k__) -#include <x86intrin.h> -#endif /* __ia32__ */ -#if defined(__ia32__) -#include <cpuid.h> -#endif /* __ia32__ */ -#elif defined(__SUNPRO_C) || defined(__sun) || defined(sun) -#include <mbarrier.h> -#elif (defined(_HPUX_SOURCE) || defined(__hpux) || defined(__HP_aCC)) && \ - (defined(HP_IA64) || defined(__ia64)) -#include <machine/sys/inline.h> -#elif defined(__IBMC__) && defined(__powerpc) -#include <atomic.h> -#elif defined(_AIX) -#include <builtins.h> -#include <sys/atomic_op.h> -#elif (defined(__osf__) && defined(__DECC)) || defined(__alpha) -#include <c_asm.h> -#include <machine/builtins.h> -#elif defined(__MWERKS__) -/* CodeWarrior - troubles ? */ -#pragma gcc_extensions -#elif defined(__SNC__) -/* Sony PS3 - troubles ? */ -#elif defined(__hppa__) || defined(__hppa) -#include <machine/inline.h> -#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(<endian.h>) -#include <endian.h> -#elif defined(__APPLE__) || defined(__MACH__) || defined(__OpenBSD__) || \ - defined(HAVE_MACHINE_ENDIAN_H) || __has_include(<machine/endian.h>) -#include <machine/endian.h> -#elif defined(HAVE_SYS_ISA_DEFS_H) || __has_include(<sys/isa_defs.h>) -#include <sys/isa_defs.h> -#elif (defined(HAVE_SYS_TYPES_H) && defined(HAVE_SYS_ENDIAN_H)) || \ - (__has_include(<sys/types.h>) && __has_include(<sys/endian.h>)) -#include <sys/endian.h> -#include <sys/types.h> -#elif defined(__bsdi__) || defined(__DragonFly__) || defined(__FreeBSD__) || \ - defined(__NetBSD__) || \ - defined(HAVE_SYS_PARAM_H) || __has_include(<sys/param.h>) -#include <sys/param.h> -#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__ */ - -/* 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. */ -MDBX_NOTHROW_CONST_FUNCTION 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 -} - -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; - -typedef union bin128 { - __anonymous_struct_extension__ struct { uint64_t x, y; }; - __anonymous_struct_extension__ struct { uint32_t a, b, c, d; }; -} bin128_t; - -#if defined(_WIN32) || defined(_WIN64) -typedef union MDBX_srwlock { - struct { - long volatile readerCount; - long volatile writerCount; - }; - RTL_SRWLOCK native; -} MDBX_srwlock; -#endif /* Windows */ - -#ifdef __cplusplus -extern void mdbx_osal_jitter(bool tiny); -#else - -/*----------------------------------------------------------------------------*/ -/* Atomics */ - -#if defined(__cplusplus) && !defined(__STDC_NO_ATOMICS__) && (__has_include(<cstdatomic>) || __has_extension(cxx_atomic)) -#include <cstdatomic> -#define MDBX_HAVE_C11ATOMICS -#elif !defined(__cplusplus) && \ - (__STDC_VERSION__ >= 201112L || __has_extension(c_atomic)) && \ - !defined(__STDC_NO_ATOMICS__) && \ - (__GNUC_PREREQ(4, 9) || __CLANG_PREREQ(3, 8) || \ - !(defined(__GNUC__) || defined(__clang__))) -#include <stdatomic.h> -#define MDBX_HAVE_C11ATOMICS -#elif defined(__GNUC__) || defined(__clang__) -#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 <libkern/OSAtomic.h> -#else -#error FIXME atomic-ops -#endif - -/*----------------------------------------------------------------------------*/ -/* Memory/Compiler barriers, cache coherence */ - -#if __has_include(<sys/cachectl.h>) -#include <sys/cachectl.h> -#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 <sys/cachectl.h> -#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(); -#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) { -#ifdef MDBX_HAVE_C11ATOMICS - atomic_thread_fence(memory_order_seq_cst); -#elif defined(__ATOMIC_SEQ_CST) -#ifdef __clang__ - __c11_atomic_thread_fence(__ATOMIC_SEQ_CST); -#else - __atomic_thread_fence(__ATOMIC_SEQ_CST); -#endif -#elif defined(__clang__) || defined(__GNUC__) - __sync_synchronize(); -#elif defined(_WIN32) || defined(_WIN64) - MemoryBarrier(); -#elif defined(__INTEL_COMPILER) /* LY: Intel Compiler may mimic GCC and MSC */ -#if defined(__ia32__) - _mm_mfence(); -#else - __mf(); -#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 MDBX_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_RunningOnWSL1 /* Windows Subsystem 1 for Linux */; -#endif /* Linux */ - -#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_condpair_init(mdbx_condpair_t *condpair); -MDBX_INTERNAL_FUNC int mdbx_condpair_lock(mdbx_condpair_t *condpair); -MDBX_INTERNAL_FUNC int mdbx_condpair_unlock(mdbx_condpair_t *condpair); -MDBX_INTERNAL_FUNC int mdbx_condpair_signal(mdbx_condpair_t *condpair, - bool part); -MDBX_INTERNAL_FUNC int mdbx_condpair_wait(mdbx_condpair_t *condpair, bool part); -MDBX_INTERNAL_FUNC int mdbx_condpair_destroy(mdbx_condpair_t *condpair); - -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_NONE = 0, - MDBX_SYNC_DATA = 1, - MDBX_SYNC_SIZE = 2, - MDBX_SYNC_IODQ = 4 -}; - -MDBX_INTERNAL_FUNC int mdbx_fsync(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_OPEN_DELETE = 5 -}; - -MDBX_INTERNAL_FUNC int mdbx_openfile(const enum mdbx_openfile_purpose purpose, - const MDBX_env *env, const char *pathname, - mdbx_filehandle_t *fd, - mdbx_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_removedirectory(const char *pathname); -MDBX_INTERNAL_FUNC int mdbx_is_pipe(mdbx_filehandle_t fd); -MDBX_INTERNAL_FUNC int mdbx_lockfile(mdbx_filehandle_t fd, bool wait); - -#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, const bool may_move); -#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, - enum mdbx_syncmode_bits mode_bits); -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); - -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 argument. 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 (especially 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 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; -} - -typedef LSTATUS(WINAPI *MDBX_RegGetValueA)(HKEY hkey, LPCSTR lpSubKey, - LPCSTR lpValue, DWORD dwFlags, - LPDWORD pdwType, PVOID pvData, - LPDWORD pcbData); -MDBX_INTERNAL_VAR MDBX_RegGetValueA mdbx_RegGetValueA; - -#endif /* Windows */ - -#endif /* !__cplusplus */ - -/*----------------------------------------------------------------------------*/ - -#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 _MSC_VER -#pragma warning(pop) -#endif - -#define mdbx_sourcery_anchor XCONCAT(mdbx_sourcery_, MDBX_BUILD_SOURCERY) -#if defined(MDBX_TOOLS) -extern LIBMDBX_API const char *const mdbx_sourcery_anchor; -#endif - -/******************************************************************************* - ******************************************************************************* - ******************************************************************************* - * - * - * #### ##### ##### # #### # # #### - * # # # # # # # # ## # # - * # # # # # # # # # # # #### - * # # ##### # # # # # # # # - * # # # # # # # # ## # # - * #### # # # #### # # #### - * - * - */ - -/** \defgroup build_option Build options - * The libmdbx build options. - @{ */ - -#ifdef DOXYGEN -/* !!! Actually this is a fake definitions !!! - * !!! for documentation generation by Doxygen !!! */ - -/** Controls enabling of debugging features. - * - * - `MDBX_DEBUG = 0` (by default) Disables any debugging features at all, - * including logging and assertion controls. - * Logging level and corresponding debug flags changing - * by \ref mdbx_setup_debug() will not have effect. - * - `MDBX_DEBUG > 0` Enables code for the debugging features (logging, - * assertions checking and internal audit). - * Simultaneously sets the default logging level - * to the `MDBX_DEBUG` value. - * Also enables \ref MDBX_DBG_AUDIT if `MDBX_DEBUG >= 2`. - * - * \ingroup build_option */ -#define MDBX_DEBUG 0...7 - -/** Disables using of GNU libc extensions. */ -#define MDBX_DISABLE_GNU_SOURCE 0 or 1 - -#endif /* DOXYGEN */ - -/** 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 -/** Choices \ref MDBX_OSX_WANNA_DURABILITY or \ref MDBX_OSX_WANNA_SPEED - * for OSX & iOS */ -#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_ENV_CHECKPID -#if defined(MADV_DONTFORK) || defined(_WIN32) || defined(_WIN64) -/* PID check could be omitted: - * - 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_ENV_CHECKPID 0 -#else -#define MDBX_ENV_CHECKPID 1 -#endif -#define MDBX_ENV_CHECKPID_CONFIG "AUTO=" STRINGIFY(MDBX_ENV_CHECKPID) -#else -#define MDBX_ENV_CHECKPID_CONFIG STRINGIFY(MDBX_ENV_CHECKPID) -#endif /* MDBX_ENV_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 */ - -/** Controls online database auto-compactification during write-transactions. */ -#ifndef MDBX_ENABLE_REFUND -#define MDBX_ENABLE_REFUND 1 -#endif -#if !(MDBX_ENABLE_REFUND == 0 || MDBX_ENABLE_REFUND == 1) -#error MDBX_ENABLE_REFUND must be defined as 0 or 1 -#endif /* MDBX_ENABLE_REFUND */ - -/** Controls sort order of internal page number lists. - * The database format depend on this option and libmdbx builded with different - * option value are incompatible. */ -#ifndef MDBX_PNL_ASCENDING -#define MDBX_PNL_ASCENDING 0 -#endif -#if !(MDBX_PNL_ASCENDING == 0 || MDBX_PNL_ASCENDING == 1) -#error MDBX_PNL_ASCENDING must be defined as 0 or 1 -#endif /* MDBX_PNL_ASCENDING */ - -//------------------------------------------------------------------------------ - -/** Win32 File Locking API for \ref MDBX_LOCKING */ -#define MDBX_LOCKING_WIN32FILES -1 - -/** SystemV IPC semaphores for \ref MDBX_LOCKING */ -#define MDBX_LOCKING_SYSV 5 - -/** POSIX-1 Shared anonymous semaphores for \ref MDBX_LOCKING */ -#define MDBX_LOCKING_POSIX1988 1988 - -/** POSIX-2001 Shared Mutexes for \ref MDBX_LOCKING */ -#define MDBX_LOCKING_POSIX2001 2001 - -/** POSIX-2008 Robust Mutexes for \ref MDBX_LOCKING */ -#define MDBX_LOCKING_POSIX2008 2008 - -/** BeOS Benaphores, aka Futexes for \ref MDBX_LOCKING */ -#define MDBX_LOCKING_BENAPHORE 1995 - -/** Advanced: Choices the locking implementation (autodetection by default). */ -#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 */ - -/** Advanced: Using POSIX OFD-locks (autodetection by default). */ -#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 */ - -/** Advanced: Using sendfile() syscall (autodetection by default). */ -#ifndef MDBX_USE_SENDFILE -#if ((defined(__linux__) || defined(__gnu_linux__)) && \ - !defined(__ANDROID_API__)) || \ - (defined(__ANDROID_API__) && __ANDROID_API__ >= 21) -#define MDBX_USE_SENDFILE 1 -#else -#define MDBX_USE_SENDFILE 0 -#endif -#endif /* MDBX_USE_SENDFILE */ - -/** Advanced: Using copy_file_range() syscall (autodetection by default). */ -#ifndef MDBX_USE_COPYFILERANGE -#if __GLIBC_PREREQ(2, 27) && defined(_GNU_SOURCE) -#define MDBX_USE_COPYFILERANGE 1 -#else -#define MDBX_USE_COPYFILERANGE 0 -#endif -#endif /* MDBX_USE_COPYFILERANGE */ - -/** Advanced: Using sync_file_range() syscall (autodetection by default). */ -#ifndef MDBX_USE_SYNCFILERANGE -#if ((defined(__linux__) || defined(__gnu_linux__)) && \ - defined(SYNC_FILE_RANGE_WRITE) && !defined(__ANDROID_API__)) || \ - (defined(__ANDROID_API__) && __ANDROID_API__ >= 26) -#define MDBX_USE_SYNCFILERANGE 1 -#else -#define MDBX_USE_SYNCFILERANGE 0 -#endif -#endif /* MDBX_USE_SYNCFILERANGE */ - -//------------------------------------------------------------------------------ - -#ifndef MDBX_CPU_WRITEBACK_INCOHERENT -#if defined(__ia32__) || defined(__e2k__) || defined(__hppa) || \ - defined(__hppa__) || defined(DOXYGEN) -#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 || defined(DOXYGEN) -#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__) || defined(DOXYGEN) -#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 */ - -/** @} end of build options */ -/******************************************************************************* - ******************************************************************************* - ******************************************************************************/ - -/*----------------------------------------------------------------------------*/ -/* Basic constants and types */ - -typedef union { - volatile uint32_t weak; -#ifdef MDBX_HAVE_C11ATOMICS - volatile _Atomic uint32_t c11a; -#endif /* MDBX_HAVE_C11ATOMICS */ -} MDBX_atomic_uint32_t; - -typedef union { - volatile uint64_t weak; -#if defined(MDBX_HAVE_C11ATOMICS) && (MDBX_64BIT_CAS || MDBX_64BIT_ATOMIC) - volatile _Atomic uint64_t c11a; -#endif -#if !defined(MDBX_HAVE_C11ATOMICS) || !MDBX_64BIT_CAS || !MDBX_64BIT_ATOMIC - __anonymous_struct_extension__ struct { -#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ - MDBX_atomic_uint32_t low, high; -#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ - MDBX_atomic_uint32_t high, low; -#else -#error "FIXME: Unsupported byte order" -#endif /* __BYTE_ORDER__ */ - }; -#endif -} MDBX_atomic_uint64_t; - -/* 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 - -/* 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; -typedef MDBX_atomic_uint32_t atomic_pgno_t; -#define PRIaPGNO PRIu32 -#define MAX_PAGENO UINT32_C(0x7FFFffff) -#define MIN_PAGENO NUM_METAS - -#define SAFE64_INVALID_THRESHOLD UINT64_C(0xffffFFFF00000000) - -/* A transaction ID. */ -typedef uint64_t txnid_t; -typedef MDBX_atomic_uint64_t atomic_txnid_t; -#define PRIaTXN PRIi64 -#define MIN_TXNID UINT64_C(1) -#define MAX_TXNID (SAFE64_INVALID_THRESHOLD - 1) -#define INITIAL_TXNID (MIN_TXNID + NUM_METAS - 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) - -/* 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 committed 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. */ - uint32_t mm_magic_and_version[2]; - - /* txnid that committed this page, the first of a two-phase-update pair */ - uint32_t mm_txnid_a[2]; - - 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(unaligned_peek_u64(4, (meta)->mm_datasync_sign)) - uint32_t mm_datasync_sign[2]; - - /* txnid that committed this page, the second of a two-phase-update pair */ - uint32_t mm_txnid_b[2]; - - /* 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". */ - uint32_t mm_pages_retired[2]; - - /* 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 that committed this page */ - }; - 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 { - __anonymous_struct_extension__ 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 */ - -#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ - (!defined(__cplusplus) && defined(_MSC_VER)) - indx_t mp_ptrs[] /* dynamic size */; -#endif /* 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 && !defined(__cplusplus) -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_atomic_uint64_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. */ - MDBX_atomic_uint64_t mr_tid; - - /* The process ID of the process owning this reader txn. */ - MDBX_atomic_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 */ - atomic_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. */ - MDBX_atomic_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. */ - MDBX_atomic_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. */ - atomic_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. */ - MDBX_atomic_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. */ - MDBX_atomic_uint64_t mti_autosync_period; - - /* Marker to distinguish uniqueness of DB/CLK.*/ - MDBX_atomic_uint64_t mti_bait_uniqueness; - - alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ - - /* Write transaction lock. */ -#if MDBX_LOCKING > 0 - mdbx_ipclock_t mti_wlock; -#endif /* MDBX_LOCKING > 0 */ - - atomic_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). */ - MDBX_atomic_uint64_t mti_sync_timestamp; - - /* Number un-synced-with-disk pages for auto-sync feature. */ - atomic_pgno_t mti_unsynced_pages; - - /* Number of page which was discarded last time by madvise(MADV_FREE). */ - atomic_pgno_t mti_discarded_tail; - - /* Timestamp of the last readers check. */ - MDBX_atomic_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. */ - MDBX_atomic_uint32_t mti_numreaders; - MDBX_atomic_uint32_t mti_readers_refresh_flag; - -#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ - (!defined(__cplusplus) && defined(_MSC_VER)) - alignas(MDBX_CACHELINE_SIZE) /* cacheline ---------------------------------*/ - MDBX_reader mti_readers[] /* dynamic size */; -#endif /* 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_PNL_ASCENDING * 64 + 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(0x7f000000) -#endif -#define MAX_MAPSIZE64 (MAX_PAGENO * (uint64_t)MAX_PAGESIZE) - -#if MDBX_WORDBITS >= 64 -#define MAX_MAPSIZE MAX_MAPSIZE64 -#define MDBX_READERS_LIMIT \ - ((MAX_PAGESIZE - sizeof(MDBX_lockinfo)) / sizeof(MDBX_reader)) -#define MDBX_PGL_LIMIT MAX_PAGENO -#else -#define MDBX_READERS_LIMIT 1024 -#define MAX_MAPSIZE MAX_MAPSIZE32 -#define MDBX_PGL_LIMIT (MAX_MAPSIZE32 / MIN_PAGESIZE) -#endif /* MDBX_WORDBITS */ - -/*----------------------------------------------------------------------------*/ - -/* 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. By default PNLs are sorted in descending order, this allow - * cut off a page with lowest pgno (at the tail) just truncating the list. The - * sort order of PNLs is controlled by the MDBX_PNL_ASCENDING build option. */ -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 struct MDBX_dp { - pgno_t pgno; - MDBX_page *ptr; -} MDBX_dp; - -/* An DPL (dirty-page list) is a sorted array of MDBX_DPs. */ -typedef struct MDBX_dpl { - unsigned sorted; - unsigned length; - unsigned allocated; -#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ - (!defined(__cplusplus) && defined(_MSC_VER)) - MDBX_dp items[] /* dynamic size with holes at zero and after the last */; -#endif -} 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_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 */ - size_t md_klen_min, md_klen_max; /* min/max key length for the database */ - size_t md_vlen_min, - md_vlen_max; /* min/max value/data length for the database */ -} 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_RO_BEGIN_FLAGS (MDBX_TXN_RDONLY | MDBX_TXN_RDONLY_PREPARE) -#define MDBX_TXN_RW_BEGIN_FLAGS \ - (MDBX_TXN_NOMETASYNC | MDBX_TXN_NOSYNC | MDBX_TXN_TRY) - /* Additional flag for mdbx_sync_locked() */ -#define MDBX_SHRINK_ALLOWED UINT32_C(0x40000000) - - /* 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) - -#define TXN_FLAGS \ - (MDBX_TXN_FINISHED | MDBX_TXN_ERROR | MDBX_TXN_DIRTY | MDBX_TXN_SPILLS | \ - MDBX_TXN_HAS_CHILD) - -#if (TXN_FLAGS & (MDBX_TXN_RW_BEGIN_FLAGS | MDBX_TXN_RO_BEGIN_FLAGS)) || \ - ((MDBX_TXN_RW_BEGIN_FLAGS | MDBX_TXN_RO_BEGIN_FLAGS | TXN_FLAGS) & \ - MDBX_SHRINK_ALLOWED) -#error "Oops, some flags overlapped or wrong" -#endif - - 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 DBI Flags */ -#define DBI_DIRTY MDBX_DBI_DIRTY /* DB was written in this txn */ -#define DBI_STALE MDBX_DBI_STALE /* Named-DB record is older than txnID */ -#define DBI_FRESH MDBX_DBI_FRESH /* Named-DB handle opened in this txn */ -#define DBI_CREAT MDBX_DBI_CREAT /* Named-DB handle created in this txn */ -#define DBI_VALID 0x10 /* DB handle is valid, see also DB_VALID */ -#define DBI_USRVALID 0x20 /* As DB_VALID, but not set for FREE_DBI */ -#define DBI_DUPDATA 0x40 /* DB is MDBX_DUPSORT data */ -#define DBI_AUDITED 0x80 /* Internal flag for accounting during audit */ - /* Array of flags for each DB */ - uint8_t *mt_dbistate; - /* 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; - void *mt_userctx; /* User-settable context */ - - union { - struct { - /* For read txns: This thread/txn's reader table slot, or NULL. */ - MDBX_reader *reader; - } to; - struct { - /* In write txns, array of cursors for each DB */ - MDBX_cursor **cursors; - pgno_t *reclaimed_pglist; /* Reclaimed GC pages */ - txnid_t last_reclaimed; /* ID of last used record */ -#if MDBX_ENABLE_REFUND - pgno_t loose_refund_wl /* FIXME: describe */; -#endif /* MDBX_ENABLE_REFUND */ - /* 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; - /* 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; - unsigned spill_least_removed; - } tw; - }; -}; - -#if MDBX_WORDBITS >= 64 -#define CURSOR_STACK 32 -#else -#define CURSOR_STACK 24 -#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_LIVE 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_dbistate for this database */ - uint8_t *mc_dbistate; - unsigned mc_snum; /* number of pushed pages */ - unsigned 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 */ - - /* Cursor checking flags. */ -#define C_COPYING 0x100 /* skip key-value length check (copying simplify) */ -#define C_UPDATING 0x200 /* update/rebalance pending */ -#define C_RETIRING 0x400 /* refs to child pages may be invalid */ -#define C_SKIPORD 0x800 /* don't check keys ordering */ - - 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_dbistate for this Dup DB */ - uint8_t mx_dbistate; -} MDBX_xcursor; - -typedef struct MDBX_cursor_couple { - MDBX_cursor outer; - void *mc_userctx; /* User-settable context */ - MDBX_xcursor inner; -} MDBX_cursor_couple; - -/* The database environment. */ -struct MDBX_env { -#define MDBX_ME_SIGNATURE UINT32_C(0x9A899641) - MDBX_atomic_uint32_t me_signature; - /* Failed to update the meta page. Probably an I/O error. */ -#define MDBX_FATAL_ERROR UINT32_C(0x80000000) - /* Some fields are initialized. */ -#define MDBX_ENV_ACTIVE UINT32_C(0x20000000) - /* me_txkey is set */ -#define MDBX_ENV_TXKEY UINT32_C(0x10000000) - /* Legacy MDBX_MAPASYNC (prior v0.9) */ -#define MDBX_DEPRECATED_MAPASYNC UINT32_C(0x100000) -#define ENV_INTERNAL_FLAGS (MDBX_FATAL_ERROR | MDBX_ENV_ACTIVE | MDBX_ENV_TXKEY) - 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, initialized from me_os_psize */ - uint8_t me_psize2log; /* log2 of DB page size */ - int8_t me_stuck_meta; /* recovery-only: target meta page or less that zero */ - 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_pathname; /* 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 */ - atomic_txnid_t *me_oldest; /* ID of oldest reader last time we looked */ - MDBX_page *me_dp_reserve; /* list of malloc'd blocks for re-use */ - /* PNL of pages that became unused in a write txn */ - MDBX_PNL me_retired_pages; - /* 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 */ - uint32_t me_live_reader; /* have liveness lock in reader table */ - void *me_userctx; /* User-settable context */ - MDBX_atomic_uint64_t *me_sync_timestamp; - MDBX_atomic_uint64_t *me_autosync_period; - atomic_pgno_t *me_unsynced_pages; - atomic_pgno_t *me_autosync_threshold; - atomic_pgno_t *me_discarded_tail; - MDBX_atomic_uint32_t *me_meta_sync_txnid; - MDBX_hsr_func *me_hsr_callback; /* Callback for kicking laggard readers */ - unsigned me_dp_reserve_len; - struct { - unsigned dp_reserve_limit; - unsigned rp_augment_limit; - unsigned dp_limit; - unsigned dp_initial; - uint8_t dp_loose_limit; - uint8_t spill_max_denominator; - uint8_t spill_min_denominator; - uint8_t spill_parent4child_denominator; - } me_options; - struct { -#if MDBX_LOCKING > 0 - mdbx_ipclock_t wlock; -#endif /* MDBX_LOCKING > 0 */ - atomic_txnid_t oldest; - MDBX_atomic_uint64_t sync_timestamp; - MDBX_atomic_uint64_t autosync_period; - atomic_pgno_t autosync_pending; - atomic_pgno_t autosync_threshold; - atomic_pgno_t discarded_tail; - MDBX_atomic_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 -}; - -#ifndef __cplusplus -/*----------------------------------------------------------------------------*/ -/* Debug and Logging stuff */ - -#define MDBX_RUNTIME_FLAGS_INIT \ - ((MDBX_DEBUG) > 0) * MDBX_DBG_ASSERT + ((MDBX_DEBUG) > 1) * MDBX_DBG_AUDIT - -extern uint8_t mdbx_runtime_flags; -extern uint8_t mdbx_loglevel; -extern MDBX_debug_func *mdbx_debug_logger; - -MDBX_INTERNAL_FUNC void MDBX_PRINTF_ARGS(4, 5) - mdbx_debug_log(int level, const char *function, int line, const char *fmt, - ...) MDBX_PRINTF_ARGS(4, 5); -MDBX_INTERNAL_FUNC void mdbx_debug_log_va(int level, const char *function, - int line, const char *fmt, - va_list args); - -#define mdbx_log_enabled(msg) unlikely(msg <= mdbx_loglevel) - -#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) - -#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 */ - -#endif /* MDBX_DEBUG */ - -#if !MDBX_DEBUG && defined(__ANDROID_API__) -#define mdbx_assert_fail(env, msg, func, line) \ - __android_log_assert(msg, "mdbx", "%s:%u", func, line) -#else -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_DEBUG && 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_DEBUG && 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_DEBUG && 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_DEBUG && 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_DEBUG && 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_cleanup_dead_readers(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); - -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 -} - -#endif /* !__cplusplus */ - -#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_ADDED_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. - * - * 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 { - 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; - }; -#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) - -#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ - (!defined(__cplusplus) && defined(_MSC_VER)) - uint8_t mn_data[] /* key and data are appended here */; -#endif /* C99 */ -} MDBX_node; - -#define DB_PERSISTENT_FLAGS \ - (MDBX_REVERSEKEY | MDBX_DUPSORT | MDBX_INTEGERKEY | MDBX_DUPFIXED | \ - MDBX_INTEGERDUP | MDBX_REVERSEDUP) - -/* mdbx_dbi_open() flags */ -#define DB_USABLE_FLAGS (DB_PERSISTENT_FLAGS | MDBX_CREATE | MDBX_DB_ACCEDE) - -#define DB_VALID 0x8000 /* DB handle is valid, for me_dbflags */ -#define DB_INTERNAL_FLAGS DB_VALID - -#if DB_INTERNAL_FLAGS & DB_USABLE_FLAGS -#error "Oops, some flags overlapped or wrong" -#endif -#if DB_PERSISTENT_FLAGS & ~DB_USABLE_FLAGS -#error "Oops, some flags overlapped or wrong" -#endif - -/* 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 - -MDBX_NOTHROW_CONST_FUNCTION 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; -} - -MDBX_NOTHROW_CONST_FUNCTION 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; -} - -MDBX_NOTHROW_CONST_FUNCTION static __always_inline __maybe_unused bool -is_powerof2(size_t x) { - return (x & (x - 1)) == 0; -} - -MDBX_NOTHROW_CONST_FUNCTION static __always_inline __maybe_unused size_t -floor_powerof2(size_t value, size_t granularity) { - assert(is_powerof2(granularity)); - return value & ~(granularity - 1); -} - -MDBX_NOTHROW_CONST_FUNCTION static __always_inline __maybe_unused size_t -ceil_powerof2(size_t value, size_t granularity) { - return floor_powerof2(value + granularity - 1, granularity); -} - -/* 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 ENV_CHANGEABLE_FLAGS \ - (MDBX_SAFE_NOSYNC | MDBX_NOMETASYNC | MDBX_DEPRECATED_MAPASYNC | \ - MDBX_NOMEMINIT | MDBX_COALESCE | MDBX_PAGEPERTURB | MDBX_ACCEDE) -#define ENV_CHANGELESS_FLAGS \ - (MDBX_NOSUBDIR | MDBX_RDONLY | MDBX_WRITEMAP | MDBX_NOTLS | MDBX_NORDAHEAD | \ - MDBX_LIFORECLAIM | MDBX_EXCLUSIVE) -#define ENV_USABLE_FLAGS (ENV_CHANGEABLE_FLAGS | ENV_CHANGELESS_FLAGS) - -#if !defined(__cplusplus) || defined(__cpp_constexpr) -static __maybe_unused void static_checks(void) { - STATIC_ASSERT_MSG(INT16_MAX - CORE_DBS == MDBX_MAX_DBI, - "Oops, MDBX_MAX_DBI or CORE_DBS?"); - STATIC_ASSERT_MSG((unsigned)(MDBX_DB_ACCEDE | MDBX_CREATE) == - ((DB_USABLE_FLAGS | DB_INTERNAL_FLAGS) & - (ENV_USABLE_FLAGS | ENV_INTERNAL_FLAGS)), - "Oops, some flags overlapped or wrong"); - STATIC_ASSERT_MSG((ENV_INTERNAL_FLAGS & ENV_USABLE_FLAGS) == 0, - "Oops, some flags overlapped or wrong"); -} -#endif /* Disabled for MSVC 19.0 (VisualStudio 2015) */ - -#ifdef __cplusplus -} -#endif -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru>. - * 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 - * <http://www.OpenLDAP.org/license.html>. - * - * --- - * - * Portions Copyright (c) 2009, 2010 Martin Hedenfalk <martin@bzero.se> - * - * 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. */ - - -/*------------------------------------------------------------------------------ - * Internal inline functions */ - -MDBX_NOTHROW_CONST_FUNCTION static 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 */ - -MDBX_NOTHROW_CONST_FUNCTION static __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 */ -MDBX_NOTHROW_PURE_FUNCTION static __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; -} - -MDBX_NOTHROW_PURE_FUNCTION static __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)); -} - -MDBX_NOTHROW_PURE_FUNCTION static __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)); -} - -MDBX_NOTHROW_PURE_FUNCTION static __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 */ -MDBX_NOTHROW_PURE_FUNCTION static __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 */ -MDBX_NOTHROW_PURE_FUNCTION static __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 */ -MDBX_NOTHROW_PURE_FUNCTION static __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); -} - -MDBX_NOTHROW_PURE_FUNCTION static __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 */ -MDBX_NOTHROW_PURE_FUNCTION static __always_inline void * -node_key(const MDBX_node *const __restrict node) { - return (char *)node + NODESIZE; -} - -/* Address of the data for a node */ -MDBX_NOTHROW_PURE_FUNCTION static __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. */ -MDBX_NOTHROW_CONST_FUNCTION static __always_inline size_t -node_size_len(const size_t key_len, const size_t value_len) { - return NODESIZE + EVEN(key_len + value_len); -} -MDBX_NOTHROW_PURE_FUNCTION static __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); -} - -MDBX_NOTHROW_PURE_FUNCTION static __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)); -} - -MDBX_NOTHROW_PURE_FUNCTION static __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 simplest 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, - MDBX_db_flags_t flags) { - if (unlikely(!env || env->me_signature.weak != MDBX_ME_SIGNATURE)) - return -1; - - return (int)mdbx_limits_keysize_max((intptr_t)env->me_psize, flags); -} - -size_t mdbx_default_pagesize(void) { - size_t pagesize = mdbx_syspagesize(); - mdbx_ensure(nullptr, is_powerof2(pagesize)); - pagesize = (pagesize >= MIN_PAGESIZE) ? pagesize : MIN_PAGESIZE; - pagesize = (pagesize <= MAX_PAGESIZE) ? pagesize : MAX_PAGESIZE; - return pagesize; -} - -__cold intptr_t mdbx_limits_keysize_max(intptr_t pagesize, - MDBX_db_flags_t flags) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_default_pagesize(); - 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, - MDBX_db_flags_t flags) { - if (unlikely(!env || env->me_signature.weak != 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, - MDBX_db_flags_t flags) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_default_pagesize(); - 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_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; - STATIC_ASSERT(MDBX_PGL_LIMIT <= MAX_PAGENO); - const size_t pages_limit = MDBX_PGL_LIMIT / 4; - const size_t limit = - (hard_pages < pages_limit) ? hard : (pages_limit << page_ln2); - return (limit < MAX_MAPSIZE / 2) ? limit : 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. */ -MDBX_NOTHROW_PURE_FUNCTION static __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 threshold - * 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. */ -MDBX_NOTHROW_PURE_FUNCTION static __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); -} - -MDBX_NOTHROW_CONST_FUNCTION static __always_inline uint16_t -flags_db2sub(uint16_t db_flags) { - uint16_t sub_flags = db_flags & MDBX_DUPFIXED; - - /* MDBX_INTEGERDUP => MDBX_INTEGERKEY */ -#define SHIFT_INTEGERDUP_TO_INTEGERKEY 2 - STATIC_ASSERT((MDBX_INTEGERDUP >> SHIFT_INTEGERDUP_TO_INTEGERKEY) == - MDBX_INTEGERKEY); - sub_flags |= (db_flags & MDBX_INTEGERDUP) >> SHIFT_INTEGERDUP_TO_INTEGERKEY; - - /* MDBX_REVERSEDUP => MDBX_REVERSEKEY */ -#define SHIFT_REVERSEDUP_TO_REVERSEKEY 5 - STATIC_ASSERT((MDBX_REVERSEDUP >> SHIFT_REVERSEDUP_TO_REVERSEKEY) == - MDBX_REVERSEKEY); - sub_flags |= (db_flags & MDBX_REVERSEDUP) >> SHIFT_REVERSEDUP_TO_REVERSEKEY; - - return sub_flags; -} - -/*----------------------------------------------------------------------------*/ - -MDBX_NOTHROW_PURE_FUNCTION static __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; -} - -MDBX_NOTHROW_PURE_FUNCTION static __always_inline MDBX_page * -pgno2page(const MDBX_env *env, pgno_t pgno) { - return (MDBX_page *)(env->me_map + pgno2bytes(env, pgno)); -} - -MDBX_NOTHROW_PURE_FUNCTION static __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); -} - -MDBX_NOTHROW_PURE_FUNCTION static size_t -pgno_align2os_bytes(const MDBX_env *env, pgno_t pgno) { - return ceil_powerof2(pgno2bytes(env, pgno), env->me_os_psize); -} - -MDBX_NOTHROW_PURE_FUNCTION static pgno_t pgno_align2os_pgno(const MDBX_env *env, - pgno_t pgno) { - return bytes2pgno(env, pgno_align2os_bytes(env, pgno)); -} - -MDBX_NOTHROW_PURE_FUNCTION static 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 */ -MDBX_NOTHROW_PURE_FUNCTION static __always_inline void * -page_data(const MDBX_page *mp) { - return (char *)mp + PAGEHDRSZ; -} - -MDBX_NOTHROW_PURE_FUNCTION static __always_inline const MDBX_page * -data_page(const void *data) { - return container_of(data, MDBX_page, mp_ptrs); -} - -MDBX_NOTHROW_PURE_FUNCTION static __always_inline MDBX_meta * -page_meta(MDBX_page *mp) { - return (MDBX_meta *)page_data(mp); -} - -/* Number of nodes on a page */ -MDBX_NOTHROW_PURE_FUNCTION static __always_inline unsigned -page_numkeys(const MDBX_page *mp) { - return mp->mp_lower >> 1; -} - -/* The amount of space remaining in the page */ -MDBX_NOTHROW_PURE_FUNCTION static __always_inline unsigned -page_room(const MDBX_page *mp) { - return mp->mp_upper - mp->mp_lower; -} - -MDBX_NOTHROW_PURE_FUNCTION static __always_inline unsigned -page_space(const MDBX_env *env) { - STATIC_ASSERT(PAGEHDRSZ % 2 == 0); - return env->me_psize - PAGEHDRSZ; -} - -MDBX_NOTHROW_PURE_FUNCTION static __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. */ -MDBX_NOTHROW_PURE_FUNCTION static __maybe_unused __inline double -page_fill(const MDBX_env *env, const MDBX_page *mp) { - return page_used(env, mp) * 100.0 / page_space(env); -} - -/* The number of overflow pages needed to store the given size. */ -MDBX_NOTHROW_PURE_FUNCTION static __always_inline pgno_t -number_of_ovpages(const MDBX_env *env, size_t bytes) { - return bytes2pgno(env, PAGEHDRSZ - 1 + bytes) + 1; -} - -__cold static int MDBX_PRINTF_ARGS(2, 3) - bad_page(const MDBX_page *mp, const char *fmt, ...) { - if (mdbx_log_enabled(MDBX_LOG_ERROR)) { - static const MDBX_page *prev; - if (prev != mp) { - prev = mp; - mdbx_debug_log(MDBX_LOG_ERROR, "badpage", 0, - "corrupted page #%u, mod-txnid %" PRIaTXN "\n", - mp->mp_pgno, mp->mp_txnid); - } - - va_list args; - va_start(args, fmt); - mdbx_debug_log_va(MDBX_LOG_ERROR, "badpage", 0, fmt, args); - va_end(args); - } - return MDBX_CORRUPTED; -} - -/* Address of node i in page p */ -MDBX_NOTHROW_PURE_FUNCTION static __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. */ -MDBX_NOTHROW_PURE_FUNCTION static __always_inline void * -page_leaf2key(const MDBX_page *mp, unsigned i, size_t keysize) { - assert((mp->mp_flags & (P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW | P_META)) == - (P_LEAF | P_LEAF2)); - 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. */ - -enum MDBX_memory_order { - mo_Relaxed, - mo_AcquireRelease, - mo_SequentialConsistency -}; - -#ifdef MDBX_HAVE_C11ATOMICS - -#if defined(__clang__) && __clang__ < 8 -#define MDBX_WORKAROUND_CLANG_C11ATOMICS_BUG(type, ptr) \ - ((volatile _Atomic(type) *)(ptr)) -#else -#define MDBX_WORKAROUND_CLANG_C11ATOMICS_BUG(type, ptr) (ptr) -#endif /* __clang__ < 8.x */ - -static __always_inline memory_order mo_c11_store(enum MDBX_memory_order fence) { - switch (fence) { - default: - assert(false); - __unreachable(); - case mo_Relaxed: - return memory_order_relaxed; - case mo_AcquireRelease: - return memory_order_release; - case mo_SequentialConsistency: - return memory_order_seq_cst; - } -} - -static __always_inline memory_order mo_c11_load(enum MDBX_memory_order fence) { - switch (fence) { - default: - assert(false); - __unreachable(); - case mo_Relaxed: - return memory_order_relaxed; - case mo_AcquireRelease: - return memory_order_acquire; - case mo_SequentialConsistency: - return memory_order_seq_cst; - } -} -#endif /* MDBX_HAVE_C11ATOMICS */ - -static __maybe_unused __always_inline void mdbx_memory_fence(bool checkpoint, - bool write) { -#ifdef MDBX_HAVE_C11ATOMICS - atomic_thread_fence( - checkpoint ? memory_order_seq_cst - : (write ? memory_order_release : memory_order_acquire)); -#else /* MDBX_HAVE_C11ATOMICS */ - mdbx_compiler_barrier(); - if (checkpoint || (write && MDBX_CPU_WRITEBACK_INCOHERENT)) - mdbx_memory_barrier(); -#endif /* MDBX_HAVE_C11ATOMICS */ -} - -static __maybe_unused __always_inline uint32_t -atomic_store32(MDBX_atomic_uint32_t *ptr, const uint32_t value, - enum MDBX_memory_order order) { - STATIC_ASSERT(sizeof(MDBX_atomic_uint32_t) == 4); -#ifdef MDBX_HAVE_C11ATOMICS - assert(atomic_is_lock_free(&ptr->c11a)); - atomic_store_explicit(&ptr->c11a, value, mo_c11_store(order)); -#else /* MDBX_HAVE_C11ATOMICS */ - if (order != mo_Relaxed) - mdbx_compiler_barrier(); - ptr->weak = value; - if (order != mo_Relaxed) - mdbx_memory_fence(order == mo_SequentialConsistency, true); -#endif /* MDBX_HAVE_C11ATOMICS */ - return value; -} - -static __maybe_unused __always_inline uint32_t -atomic_load32(const MDBX_atomic_uint32_t *ptr, enum MDBX_memory_order order) { - STATIC_ASSERT(sizeof(MDBX_atomic_uint32_t) == 4); -#ifdef MDBX_HAVE_C11ATOMICS - assert(atomic_is_lock_free(&ptr->c11a)); - return atomic_load_explicit( - MDBX_WORKAROUND_CLANG_C11ATOMICS_BUG(uint32_t, &ptr->c11a), - mo_c11_load(order)); -#else /* MDBX_HAVE_C11ATOMICS */ - if (order != mo_Relaxed) - mdbx_memory_fence(order == mo_SequentialConsistency, false); - const uint32_t value = ptr->weak; - if (order != mo_Relaxed) - mdbx_compiler_barrier(); - return value; -#endif /* MDBX_HAVE_C11ATOMICS */ -} - -static __always_inline uint64_t atomic_store64(MDBX_atomic_uint64_t *ptr, - const uint64_t value, - enum MDBX_memory_order order) { - STATIC_ASSERT(sizeof(MDBX_atomic_uint64_t) == 8); -#if MDBX_64BIT_ATOMIC -#ifdef MDBX_HAVE_C11ATOMICS - assert(atomic_is_lock_free(&ptr->c11a)); - atomic_store_explicit(&ptr->c11a, value, mo_c11_store(order)); -#else /* MDBX_HAVE_C11ATOMICS */ - if (order != mo_Relaxed) - mdbx_compiler_barrier(); - ptr->weak = value; - if (order != mo_Relaxed) - mdbx_memory_fence(order == mo_SequentialConsistency, true); -#endif /* MDBX_HAVE_C11ATOMICS */ -#else /* !MDBX_64BIT_ATOMIC */ - atomic_store32(&ptr->low, (uint32_t)value, - (order == mo_Relaxed) ? mo_Relaxed : mo_AcquireRelease); - mdbx_jitter4testing(true); - atomic_store32(&ptr->high, (uint32_t)(value >> 32), order); - mdbx_jitter4testing(true); -#endif /* !MDBX_64BIT_ATOMIC */ - return value; -} - -static __always_inline uint64_t atomic_load64(const MDBX_atomic_uint64_t *ptr, - enum MDBX_memory_order order) { - STATIC_ASSERT(sizeof(MDBX_atomic_uint64_t) == 8); -#if MDBX_64BIT_ATOMIC -#ifdef MDBX_HAVE_C11ATOMICS - assert(atomic_is_lock_free(&ptr->c11a)); - return atomic_load_explicit( - MDBX_WORKAROUND_CLANG_C11ATOMICS_BUG(uint64_t, &ptr->c11a), - mo_c11_load(order)); -#else /* MDBX_HAVE_C11ATOMICS */ - if (order != mo_Relaxed) - mdbx_memory_fence(order == mo_SequentialConsistency, false); - const uint64_t value = ptr->weak; - if (order != mo_Relaxed) - mdbx_compiler_barrier(); - return value; -#endif /* MDBX_HAVE_C11ATOMICS */ -#else /* !MDBX_64BIT_ATOMIC */ - uint64_t value = (uint64_t)atomic_load32(&ptr->high, order) << 32; - mdbx_jitter4testing(true); - value |= atomic_load32(&ptr->low, (order == mo_Relaxed) ? mo_Relaxed - : mo_AcquireRelease); - mdbx_jitter4testing(true); - for (;;) { - uint64_t again = (uint64_t)atomic_load32(&ptr->high, order) << 32; - mdbx_jitter4testing(true); - again |= atomic_load32( - &ptr->low, (order == mo_Relaxed) ? mo_Relaxed : mo_AcquireRelease); - mdbx_jitter4testing(true); - if (likely(value == again)) - return value; - value = again; - } -#endif /* !MDBX_64BIT_ATOMIC */ -} - -static __always_inline void atomic_yield(void) { -#if defined(_WIN32) || defined(_WIN64) - YieldProcessor(); -#elif defined(__ia32__) || 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(__aarch64__) || (defined(__ARM_ARCH) && __ARM_ARCH > 6) || \ - defined(__ARM_ARCH_6K__) -#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"); -#elif defined(__linux__) || defined(__gnu_linux__) || defined(_UNIX03_SOURCE) - sched_yield(); -#elif (defined(_GNU_SOURCE) && __GLIBC_PREREQ(2, 1)) || defined(_OPEN_THREADS) - pthread_yield(); -#endif -} - -#if MDBX_64BIT_CAS -static __always_inline bool atomic_cas64(MDBX_atomic_uint64_t *p, uint64_t c, - uint64_t v) { -#ifdef MDBX_HAVE_C11ATOMICS - STATIC_ASSERT(sizeof(long long) >= sizeof(uint64_t)); -#ifdef ATOMIC_LLONG_LOCK_FREE - STATIC_ASSERT(ATOMIC_LLONG_LOCK_FREE > 0); -#if ATOMIC_LLONG_LOCK_FREE < 2 - assert(atomic_is_lock_free(&p->c11a)); -#endif /* ATOMIC_LLONG_LOCK_FREE < 2 */ -#else /* defined(ATOMIC_LLONG_LOCK_FREE) */ - assert(atomic_is_lock_free(&p->c11a)); -#endif - return atomic_compare_exchange_strong(&p->c11a, &c, v); -#elif defined(__GNUC__) || defined(__clang__) - return __sync_bool_compare_and_swap(&p->weak, c, v); -#elif defined(_MSC_VER) - return c == (uint64_t)_InterlockedCompareExchange64(&p->weak, v, c); -#elif defined(__APPLE__) - return OSAtomicCompareAndSwap64Barrier(c, v, &p->weak); -#else -#error FIXME: Unsupported compiler -#endif -} -#endif /* MDBX_64BIT_CAS */ - -static __always_inline bool atomic_cas32(MDBX_atomic_uint32_t *p, uint32_t c, - uint32_t v) { -#ifdef MDBX_HAVE_C11ATOMICS - STATIC_ASSERT(sizeof(int) >= sizeof(uint32_t)); -#ifdef ATOMIC_INT_LOCK_FREE - STATIC_ASSERT(ATOMIC_INT_LOCK_FREE > 0); -#if ATOMIC_INT_LOCK_FREE < 2 - assert(atomic_is_lock_free(&p->c11a)); -#endif -#else - assert(atomic_is_lock_free(&p->c11a)); -#endif - return atomic_compare_exchange_strong(&p->c11a, &c, v); -#elif defined(__GNUC__) || defined(__clang__) - return __sync_bool_compare_and_swap(&p->weak, c, v); -#elif defined(_MSC_VER) - STATIC_ASSERT(sizeof(volatile long) == sizeof(volatile uint32_t)); - return c == (uint32_t)_InterlockedCompareExchange(&p->weak, v, c); -#elif defined(__APPLE__) - return OSAtomicCompareAndSwap32Barrier(c, v, &p->weak); -#else -#error FIXME: Unsupported compiler -#endif -} - -static __always_inline uint32_t atomic_add32(MDBX_atomic_uint32_t *p, - uint32_t v) { -#ifdef MDBX_HAVE_C11ATOMICS - STATIC_ASSERT(sizeof(int) >= sizeof(uint32_t)); -#ifdef ATOMIC_INT_LOCK_FREE - STATIC_ASSERT(ATOMIC_INT_LOCK_FREE > 0); -#if ATOMIC_INT_LOCK_FREE < 2 - assert(atomic_is_lock_free(&p->c11a)); -#endif -#else - assert(atomic_is_lock_free(&p->c11a)); -#endif - return atomic_fetch_add(&p->c11a, v); -#elif defined(__GNUC__) || defined(__clang__) - return __sync_fetch_and_add(&p->weak, v); -#elif defined(_MSC_VER) - STATIC_ASSERT(sizeof(volatile long) == sizeof(volatile uint32_t)); - return _InterlockedExchangeAdd(&p->weak, v); -#elif defined(__APPLE__) - return OSAtomicAdd32Barrier(v, &p->weak); -#else -#error FIXME: Unsupported compiler -#endif -} - -#define atomic_sub32(p, v) atomic_add32(p, 0 - (v)) - -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_atomic_uint64_t *ptr, - bool single_writer) { -#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() */; - atomic_store32( - &ptr->high, UINT32_MAX, - mo_AcquireRelease) /* atomically make >= SAFE64_INVALID_THRESHOLD */; - atomic_add32(&ptr->low, 1) /* avoid ABA in safe64_reset_compare() */; - } else -#elif MDBX_64BIT_ATOMIC - /* atomically make value >= SAFE64_INVALID_THRESHOLD by 64-bit operation */ - atomic_store64(ptr, UINT64_MAX, - single_writer ? mo_AcquireRelease : mo_SequentialConsistency); -#else - /* atomically make value >= SAFE64_INVALID_THRESHOLD by 32-bit operation */ - atomic_store32(&ptr->high, UINT32_MAX, - single_writer ? mo_AcquireRelease : mo_SequentialConsistency); -#endif /* MDBX_64BIT_ATOMIC */ - assert(ptr->weak >= SAFE64_INVALID_THRESHOLD); - mdbx_jitter4testing(true); -} - -static __always_inline bool safe64_reset_compare(MDBX_atomic_uint64_t *ptr, - txnid_t compare) { - /* LY: This function is used to reset `mr_txnid` from hsr-handler 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, compare, UINT64_MAX); -#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(atomic_load32(&ptr->low, mo_AcquireRelease) == (uint32_t)compare && - atomic_cas32(&ptr->high, (uint32_t)(compare >> 32), UINT32_MAX))) { - if (unlikely(atomic_load32(&ptr->low, mo_AcquireRelease) != - (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_atomic_uint64_t *ptr, - const uint64_t v) { - assert(ptr->weak >= SAFE64_INVALID_THRESHOLD); -#if MDBX_64BIT_ATOMIC - atomic_store64(ptr, v, mo_AcquireRelease); -#else /* MDBX_64BIT_ATOMIC */ - /* update low-part but still value >= SAFE64_INVALID_THRESHOLD */ - atomic_store32(&ptr->low, (uint32_t)v, mo_AcquireRelease); - assert(ptr->weak >= SAFE64_INVALID_THRESHOLD); - mdbx_jitter4testing(true); - /* update high-part from SAFE64_INVALID_THRESHOLD to actual value */ - atomic_store32(&ptr->high, (uint32_t)(v >> 32), mo_AcquireRelease); -#endif /* MDBX_64BIT_ATOMIC */ - assert(ptr->weak == v); - mdbx_jitter4testing(true); -} - -static __always_inline uint64_t safe64_read(const MDBX_atomic_uint64_t *ptr) { - mdbx_jitter4testing(true); - uint64_t v = atomic_load64(ptr, mo_AcquireRelease); - mdbx_jitter4testing(true); - return v; -} - -#if 0 /* unused for now */ - 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_atomic_uint64_t *ptr) { -#if MDBX_64BIT_ATOMIC - return atomic_load64(ptr, mo_AcquireRelease) < SAFE64_INVALID_THRESHOLD; -#else - return atomic_load32(&ptr->high, mo_AcquireRelease) != UINT32_MAX; -#endif /* MDBX_64BIT_ATOMIC */ -} - -static __always_inline void safe64_update(MDBX_atomic_uint64_t *ptr, - const uint64_t v) { -#if MDBX_64BIT_ATOMIC - safe64_reset(ptr, true); -#endif /* MDBX_64BIT_ATOMIC */ - safe64_write(ptr, v); -} -#endif /* unused for now */ - -/*----------------------------------------------------------------------------*/ -/* 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 MDBX_atomic_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-storage 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_REGISTERED 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_REGISTERED; - 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.weak, self_pid); - if (atomic_load32(&rthc->mr_pid, mo_Relaxed) == self_pid) { - mdbx_trace("==== thread 0x%" PRIxPTR ", rthc %p, cleanup", - mdbx_thread_self(), __Wpedantic_format_voidptr(rthc)); - atomic_store32(&rthc->mr_pid, 0, mo_AcquireRelease); - } - } - -#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 (atomic_load32(&rthc_pending, mo_AcquireRelease) == 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 = atomic_load32(&rthc_pending, mo_AcquireRelease)) > 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.weak, self_pid); - if (atomic_load32(&rthc->mr_pid, mo_Relaxed) == self_pid) { - atomic_store32(&rthc->mr_pid, 0, mo_AcquireRelease); - 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 (atomic_load32(&rthc->mr_pid, mo_Relaxed) == self_pid) { - atomic_store32(&rthc->mr_pid, 0, mo_AcquireRelease); - 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 -} - -MDBX_NOTHROW_CONST_FUNCTION 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 = atomic_load64(&pending->lck->mti_bait_uniqueness, mo_AcquireRelease); - 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 == atomic_load64(&scan->lck->mti_bait_uniqueness, mo_AcquireRelease)) - 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; - atomic_store64(&scan->lck->mti_bait_uniqueness, cadabra, - mo_SequentialConsistency); - *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 = atomic_load64(&scan->me_lck_mmap.lck->mti_bait_uniqueness, - mo_AcquireRelease) - ? 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 const TYPE_LIST *NAME( \ - const TYPE_LIST *first, unsigned length, const TYPE_ARG item) { \ - const TYPE_LIST *const begin = first, *const end = begin + length; \ - \ - while (length > 3) { \ - const unsigned whole = length; \ - length >>= 1; \ - const 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 (const TYPE_LIST *scan = begin; scan < first; ++scan) \ - assert(CMP(*scan, item)); \ - for (const 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_PGL_LIMIT); - 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_PGL_LIMIT); - 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_PGL_LIMIT && - 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_PGL_LIMIT && - MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); - if (likely(allocated >= wanna)) - return MDBX_SUCCESS; - - if (unlikely(wanna > /* paranoia */ MDBX_PGL_LIMIT)) { - mdbx_error("PNL too long (%zu > %zu)", wanna, (size_t)MDBX_PGL_LIMIT); - return MDBX_TXN_FULL; - } - - const size_t size = (wanna + wanna - allocated < MDBX_PGL_LIMIT) - ? wanna + wanna - allocated - : MDBX_PGL_LIMIT; - 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_PGL_LIMIT && - MDBX_PNL_ALLOCLEN(*ppl) >= MDBX_PNL_SIZE(*ppl)); - assert(num <= MDBX_PGL_LIMIT); - 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 range onto an unsorted PNL */ -__always_inline static int __must_check_result -mdbx_pnl_append_range(bool spilled, 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; - pgno += spilled ? 2 : 1; - } while (--n); - MDBX_PNL_SIZE(pnl) = w; -#else - unsigned w = MDBX_PNL_SIZE(pnl) + n; - MDBX_PNL_SIZE(pnl) = w; - do { - pnl[w--] = pgno; - pgno += spilled ? 2 : 1; - } 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) { - 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_PGL_LIMIT); - if (unlikely(MDBX_PNL_SIZE(pl) > MDBX_PGL_LIMIT)) - 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)); -} - -static void mdbx_spill_remove(MDBX_txn *txn, unsigned idx, unsigned npages) { - mdbx_tassert(txn, idx > 0 && idx <= MDBX_PNL_SIZE(txn->tw.spill_pages) && - txn->tw.spill_least_removed > 0); - txn->tw.spill_least_removed = - (idx < txn->tw.spill_least_removed) ? idx : txn->tw.spill_least_removed; - txn->tw.spill_pages[idx] |= 1; - MDBX_PNL_SIZE(txn->tw.spill_pages) -= - (idx == MDBX_PNL_SIZE(txn->tw.spill_pages)); - - while (unlikely(npages > 1)) { - const pgno_t pgno = (txn->tw.spill_pages[idx] >> 1) + 1; - if (MDBX_PNL_ASCENDING) { - if (++idx > MDBX_PNL_SIZE(txn->tw.spill_pages) || - (txn->tw.spill_pages[idx] >> 1) != pgno) - return; - } else { - if (--idx < 1 || (txn->tw.spill_pages[idx] >> 1) != pgno) - return; - txn->tw.spill_least_removed = (idx < txn->tw.spill_least_removed) - ? idx - : txn->tw.spill_least_removed; - } - txn->tw.spill_pages[idx] |= 1; - MDBX_PNL_SIZE(txn->tw.spill_pages) -= - (idx == MDBX_PNL_SIZE(txn->tw.spill_pages)); - --npages; - } -} - -static MDBX_PNL mdbx_spill_purge(MDBX_txn *txn) { - mdbx_tassert(txn, txn->tw.spill_least_removed > 0); - const MDBX_PNL sl = txn->tw.spill_pages; - if (txn->tw.spill_least_removed != INT_MAX) { - unsigned len = MDBX_PNL_SIZE(sl), r, w; - for (w = r = txn->tw.spill_least_removed; r <= len; ++r) { - sl[w] = sl[r]; - w += 1 - (sl[r] & 1); - } - for (size_t i = 1; i < w; ++i) - mdbx_tassert(txn, (sl[i] & 1) == 0); - MDBX_PNL_SIZE(sl) = w - 1; - txn->tw.spill_least_removed = INT_MAX; - } else { - for (size_t i = 1; i <= MDBX_PNL_SIZE(sl); ++i) - mdbx_tassert(txn, (sl[i] & 1) == 0); - } - return sl; -} - -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(const MDBX_PNL pnl, pgno_t pgno) { - assert(mdbx_pnl_check4assert(pnl, MAX_PAGENO + 1)); - const pgno_t *begin = MDBX_PNL_BEGIN(pnl); - const pgno_t *it = pgno_bsearch(begin, MDBX_PNL_SIZE(pnl), pgno); - const pgno_t *end = begin + MDBX_PNL_SIZE(pnl); - assert(it >= begin && it <= end); - if (it != begin) - assert(MDBX_PNL_ORDERED(it[-1], pgno)); - if (it != end) - assert(!MDBX_PNL_ORDERED(it[0], pgno)); - return (unsigned)(it - begin + 1); -} - -static __inline unsigned mdbx_pnl_exist(const MDBX_PNL pnl, pgno_t pgno) { - unsigned n = mdbx_pnl_search(pnl, pgno); - return (n <= MDBX_PNL_SIZE(pnl) && pnl[n] == pgno) ? n : 0; -} - -static __inline unsigned mdbx_pnl_intersect(const MDBX_PNL pnl, pgno_t pgno, - unsigned npages) { - const unsigned len = MDBX_PNL_SIZE(pnl); - if (mdbx_log_enabled(MDBX_LOG_EXTRA)) { - mdbx_debug_extra("PNL len %u [", len); - for (unsigned i = 1; i <= len; ++i) - mdbx_debug_extra_print(" %" PRIaPGNO, pnl[i]); - mdbx_debug_extra_print("%s\n", "]"); - } - const pgno_t range_last = pgno + npages - 1; -#if MDBX_PNL_ASCENDING - const unsigned n = mdbx_pnl_search(pnl, pgno); - assert(n && (n == MDBX_PNL_SIZE(pnl) + 1 || pgno <= pnl[n])); - const bool rc = n <= MDBX_PNL_SIZE(pnl) && pnl[n] <= range_last; -#else - const unsigned n = mdbx_pnl_search(pnl, range_last); - assert(n && (n == MDBX_PNL_SIZE(pnl) + 1 || range_last >= pnl[n])); - const bool rc = n <= MDBX_PNL_SIZE(pnl) && pnl[n] >= pgno; -#endif - if (mdbx_assert_enabled()) { - bool check = false; - for (unsigned i = 0; i < npages; ++i) - check |= mdbx_pnl_exist(pnl, pgno + i) != 0; - assert(check == rc); - } - return rc; -} - -/*----------------------------------------------------------------------------*/ - -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)) { - mdbx_error("TXL too long (%zu > %zu)", wanna, (size_t)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_PGL_LIMIT); - 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; -} - -/*----------------------------------------------------------------------------*/ - -static __always_inline size_t dpl2bytes(const ptrdiff_t size) { - assert(size > 2 && (size_t)size <= MDBX_PGL_LIMIT); - size_t bytes = ceil_powerof2(MDBX_ASSUME_MALLOC_OVERHEAD + sizeof(MDBX_dpl) + - (size + 2) * sizeof(MDBX_dp), - MDBX_PNL_GRANULATE * sizeof(void *) * 2) - - MDBX_ASSUME_MALLOC_OVERHEAD; - return bytes; -} - -static __always_inline unsigned bytes2dpl(const ptrdiff_t bytes) { - size_t size = (bytes - sizeof(MDBX_dpl)) / sizeof(MDBX_dp); - assert(size > 4 && size <= MDBX_PGL_LIMIT + MDBX_PNL_GRANULATE); - return (unsigned)size - 2; -} - -static __always_inline void mdbx_dpl_clear(MDBX_dpl *dl) { - dl->sorted = dl->length = 0; -} - -static void mdbx_dpl_free(MDBX_txn *txn) { - if (likely(txn->tw.dirtylist)) { - mdbx_free(txn->tw.dirtylist); - txn->tw.dirtylist = NULL; - } -} - -static MDBX_dpl *mdbx_dpl_reserve(MDBX_txn *txn, size_t size) { - mdbx_tassert(txn, - txn->tw.dirtylist == NULL || txn->tw.dirtylist->length <= size); - size_t bytes = dpl2bytes((size < MDBX_PGL_LIMIT) ? size : MDBX_PGL_LIMIT); - MDBX_dpl *const dl = mdbx_realloc(txn->tw.dirtylist, bytes); - if (likely(dl)) { -#if __GLIBC_PREREQ(2, 12) || defined(__FreeBSD__) || defined(malloc_usable_size) - bytes = malloc_usable_size(dl); -#endif /* malloc_usable_size */ - dl->allocated = bytes2dpl(bytes); - dl->items[0].pgno = 0; - dl->items[0].ptr = nullptr; - mdbx_tassert(txn, txn->tw.dirtylist == NULL || dl->length <= dl->allocated); - txn->tw.dirtylist = dl; - } - return dl; -} - -static int mdbx_dpl_alloc(MDBX_txn *txn) { - mdbx_tassert(txn, - (txn->mt_flags & MDBX_TXN_RDONLY) == 0 && !txn->tw.dirtylist); - MDBX_dpl *const dl = - mdbx_dpl_reserve(txn, txn->mt_env->me_options.dp_initial); - if (unlikely(!dl)) - return MDBX_ENOMEM; - mdbx_dpl_clear(dl); - 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_PGL_LIMIT); - assert(dl->sorted <= dl->length); - if (dl->sorted != dl->length) { - dl->sorted = dl->length; - dp_sort(dl->items + 1, dl->items + 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->items + dl->sorted; --ptr > dl->items;) { - 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->items + 1, dl->items + dl->length + 1); - break; - case 0: - /* whole sorted cases */ - break; - -#define LINEAR_SEARCH_CASE(N) \ - case N: \ - if (dl->items[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->items[dl->length].pgno == pgno) - return dl->length; - /* continue bsearch on the sorted part */ - break; - } - return (unsigned)(dp_bsearch(dl->items + 1, dl->sorted, pgno) - dl->items); -} - -static __inline bool mdbx_dpl_intersect(MDBX_dpl *dl, pgno_t pgno, - unsigned npages) { - assert(dl->sorted == dl->length); - unsigned const n = mdbx_dpl_search(dl, pgno); - assert(n >= 1 && n <= dl->length + 1); - assert(n > dl->length || pgno <= dl->items[n].pgno); - assert(n == 1 || pgno > dl->items[n - 1].pgno); - const MDBX_page *const prev = dl->items[n - 1].ptr; - const bool rc = - (/* intersection with founded */ n <= dl->length && - pgno + npages > dl->items[n].pgno) || - (/* intersection with prev */ n > 1 && unlikely(IS_OVERFLOW(prev)) && - prev->mp_pgno + prev->mp_pages > pgno); - if (mdbx_assert_enabled()) { - bool check = false; - for (unsigned i = 1; i <= dl->length; ++i) { - const MDBX_page *const dp = dl->items[i].ptr; - if (!(dp->mp_pgno /* begin */ >= /* end */ pgno + npages || - dp->mp_pgno + (IS_OVERFLOW(dp) ? dp->mp_pages : 1) /* end */ <= - /* begin */ pgno)) - check |= true; - } - assert(check == rc); - } - return rc; -} - -static __always_inline unsigned mdbx_dpl_exist(MDBX_dpl *dl, pgno_t pgno) { - unsigned i = mdbx_dpl_search(dl, pgno); - assert((int)i > 0); - return (i <= dl->length && dl->items[i].pgno == pgno) ? i : 0; -} - -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->items[i].pgno == pgno) ? dl->items[i].ptr - : nullptr; -} - -static __maybe_unused const MDBX_page *debug_dpl_find(const MDBX_dpl *dl, - const pgno_t pgno) { - for (unsigned i = dl->length; i > dl->sorted; --i) - if (dl->items[i].pgno == pgno) - return dl->items[i].ptr; - - if (dl->sorted) { - const unsigned i = - (unsigned)(dp_bsearch(dl->items + 1, dl->sorted, pgno) - dl->items); - if (i <= dl->sorted && dl->items[i].pgno == pgno) - return dl->items[i].ptr; - } - return nullptr; -} - -static void mdbx_dpl_remove(MDBX_dpl *dl, unsigned i) { - assert((int)i > 0 && i <= dl->length); - dl->sorted -= dl->sorted >= i; - dl->length -= 1; - if (dl->length >= i) - memmove(dl->items + i, dl->items + i + 1, - (dl->length - i + 1) * sizeof(dl->items[0])); -} - -static __always_inline int __must_check_result -mdbx_dpl_append(MDBX_txn *txn, pgno_t pgno, MDBX_page *page) { - MDBX_dpl *dl = txn->tw.dirtylist; - assert(dl->length <= MDBX_PGL_LIMIT + MDBX_PNL_GRANULATE); - if (mdbx_audit_enabled()) { - for (unsigned i = dl->length; i > 0; --i) { - assert(dl->items[i].pgno != pgno); - if (unlikely(dl->items[i].pgno == pgno)) - return MDBX_PROBLEM; - } - } - - if (unlikely(dl->length == dl->allocated)) { - if (unlikely(dl->allocated >= MDBX_PGL_LIMIT)) { - mdbx_error("DPL is full (MDBX_PGL_LIMIT %u)", MDBX_PGL_LIMIT); - return MDBX_TXN_FULL; - } - const size_t size = (dl->allocated < MDBX_PNL_INITIAL * 42) - ? dl->allocated + dl->allocated - : dl->allocated + dl->allocated / 2; - dl = mdbx_dpl_reserve(txn, size); - if (unlikely(!dl)) - return MDBX_ENOMEM; - mdbx_tassert(txn, dl->length < dl->allocated); - } - - /* append page */ - const unsigned n = dl->length + 1; - if (n == 1 || (dl->sorted >= dl->length && dl->items[n - 1].pgno < pgno)) - dl->sorted = n; - dl->length = n; - dl->items[n].pgno = pgno; - dl->items[n].ptr = page; - return MDBX_SUCCESS; -} - -/*----------------------------------------------------------------------------*/ - -uint8_t mdbx_runtime_flags = MDBX_RUNTIME_FLAGS_INIT; -uint8_t mdbx_loglevel = MDBX_LOG_FATAL; -MDBX_debug_func *mdbx_debug_logger; - -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_kick_longlived_readers(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_PURE_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, const unsigned mode); - -static int __must_check_result mdbx_page_get(MDBX_cursor *mc, pgno_t pgno, - MDBX_page **mp, int *lvl, - txnid_t pp_txnid); -static int __must_check_result mdbx_page_search_root(MDBX_cursor *mc, - const MDBX_val *key, - int flags); - -#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, - const 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, const 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, - const txnid_t pp_txnid); -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 int __must_check_result mdbx_page_check(MDBX_cursor *const mc, - const MDBX_page *const mp, - unsigned options); -static int __must_check_result mdbx_cursor_check(MDBX_cursor *mc, - unsigned options); -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); -#define SIBLING_LEFT 0 -#define SIBLING_RIGHT 2 -static int __must_check_result mdbx_cursor_sibling(MDBX_cursor *mc, int dir); -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, - const MDBX_page *mp); -static int __must_check_result mdbx_xcursor_init2(MDBX_cursor *mc, - MDBX_xcursor *src_mx, - bool new_dupdata); -static void cursor_copy_internal(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 int __must_check_result mdbx_setup_dbx(MDBX_dbx *const dbx, - const MDBX_db *const db, - const unsigned pagesize); - -static MDBX_cmp_func cmp_lexical, cmp_reverse, cmp_int_align4, cmp_int_align2, - cmp_int_unaligned, cmp_lenfast; - -static __inline MDBX_cmp_func *get_default_keycmp(unsigned flags); -static __inline MDBX_cmp_func *get_default_datacmp(unsigned flags); - -__cold const char *mdbx_liberr2str(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_BUSY) { - 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_liberr2str(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 : "FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM) failed"; -#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_liberr2str(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_liberr2str(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) - msg = "FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM) failed"; - else if (!CharToOemBuffA(buf, buf, size)) - msg = "CharToOemBuffA() failed"; - else - 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_va(int level, const char *function, int line, - const char *fmt, va_list args) { - 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 - } -} - -void __cold mdbx_debug_log(int level, const char *function, int line, - const char *fmt, ...) { - va_list args; - va_start(args, fmt); - mdbx_debug_log_va(level, function, line, fmt, args); - 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 "<null>"; - if (!key->iov_len) - return "<empty>"; - if (!buf || bufsize < 4) - return nullptr; - - bool is_ascii = true; - const uint8_t *const data = key->iov_base; - for (unsigned i = 0; i < key->iov_len; i++) - if (data[i] < ' ' || data[i] > '~') { - is_ascii = false; - break; - } - - 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 (unsigned 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, - unaligned_peek_u64(4, page_meta(mp)->mm_txnid_a)); - 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 initialized 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) - -static __maybe_unused bool cursor_is_tracked(const MDBX_cursor *mc) { - for (MDBX_cursor *scan = mc->mc_txn->tw.cursors[mc->mc_dbi]; scan; - scan = scan->mc_next) - if (mc == ((mc->mc_flags & C_SUB) ? &scan->mc_xcursor->mx_cursor : scan)) - return true; - return false; -} - -/* Perform act while tracking temporary cursor mn */ -#define WITH_CURSOR_TRACKING(mn, act) \ - do { \ - mdbx_cassert(&(mn), \ - mn.mc_txn->tw.cursors != NULL /* must be not rdonly txt */); \ - mdbx_cassert(&(mn), !cursor_is_tracked(&(mn))); \ - MDBX_cursor mc_dummy; \ - MDBX_cursor **tracking_head = &(mn).mc_txn->tw.cursors[mn.mc_dbi]; \ - MDBX_cursor *tracked = &(mn); \ - if ((mn).mc_flags & C_SUB) { \ - mc_dummy.mc_flags = C_INITIALIZED; \ - mc_dummy.mc_top = 0; \ - mc_dummy.mc_xcursor = (MDBX_xcursor *)&(mn); \ - tracked = &mc_dummy; \ - } \ - tracked->mc_next = *tracking_head; \ - *tracking_head = tracked; \ - { act; } \ - *tracking_head = 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_dp_reserve; - size_t size = env->me_psize; - if (likely(num == 1 && np)) { - mdbx_assert(env, env->me_dp_reserve_len > 0); - 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_dp_reserve = np->mp_next; - env->me_dp_reserve_len -= 1; - } 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 shadow dirty page */ -static void mdbx_dpage_free(MDBX_env *env, MDBX_page *dp, unsigned npages) { - VALGRIND_MAKE_MEM_UNDEFINED(dp, pgno2bytes(env, npages)); - ASAN_UNPOISON_MEMORY_REGION(dp, pgno2bytes(env, npages)); - if (MDBX_DEBUG || unlikely(env->me_flags & MDBX_PAGEPERTURB)) - memset(dp, -1, pgno2bytes(env, npages)); - if (npages == 1 && - env->me_dp_reserve_len < env->me_options.dp_reserve_limit) { - ASAN_POISON_MEMORY_REGION((char *)dp + sizeof(dp->mp_next), - pgno2bytes(env, npages) - sizeof(dp->mp_next)); - dp->mp_next = env->me_dp_reserve; - VALGRIND_MEMPOOL_FREE(env, dp); - env->me_dp_reserve = dp; - env->me_dp_reserve_len += 1; - } 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; - MDBX_dpl *const dl = txn->tw.dirtylist; - const size_t len = dl->length; - - for (size_t i = 1; i <= len; i++) { - MDBX_page *dp = dl->items[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; - - const MDBX_dpl *const dl = txn->tw.dirtylist; - unsigned loose = 0; - for (unsigned i = dl->length; i > 0; --i) { - const MDBX_page *const dp = dl->items[i].ptr; - if (!dp) - continue; - - mdbx_tassert(txn, dp->mp_pgno == dl->items[i].pgno); - if (unlikely(dp->mp_pgno != dl->items[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 < dl->sorted) { - mdbx_tassert(txn, dl->items[i + 1].pgno >= dp->mp_pgno + num); - if (unlikely(dl->items[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; - - for (unsigned i = 1; i <= MDBX_PNL_SIZE(txn->tw.retired_pages); ++i) { - const MDBX_page *const dp = debug_dpl_find(dl, txn->tw.retired_pages[i]); - mdbx_tassert(txn, !dp); - if (unlikely(dp)) - return false; - } - - return true; -} - -#if MDBX_ENABLE_REFUND -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 - 1)); -} - -static void mdbx_refund_loose(MDBX_txn *txn) { - mdbx_tassert(txn, txn->tw.loose_pages != nullptr); - mdbx_tassert(txn, txn->tw.loose_count > 0); - - MDBX_dpl *const dl = txn->tw.dirtylist; - mdbx_tassert(txn, dl->length >= txn->tw.loose_count); - - 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 *lp = txn->tw.loose_pages; lp; lp = lp->mp_next) { - mdbx_tassert(txn, lp->mp_flags == (P_LOOSE | P_DIRTY)); - mdbx_tassert(txn, txn->mt_next_pgno > lp->mp_pgno); - if (likely(txn->mt_next_pgno - txn->tw.loose_count <= lp->mp_pgno)) { - mdbx_tassert(txn, - w < ((suitable == onstack) ? bytes2pnl(sizeof(onstack)) - : MDBX_PNL_ALLOCLEN(suitable))); - suitable[++w] = lp->mp_pgno; - most = (lp->mp_pgno > most) ? lp->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_debug("refund-suitable %u pages %" PRIaPGNO " -> %" PRIaPGNO, - refunded, most, txn->mt_next_pgno); - txn->tw.loose_count -= refunded; - txn->tw.dirtyroom += refunded; - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - txn->mt_next_pgno = most; - - /* Filter-out dirty list */ - unsigned r = 0; - w = 0; - if (dl->sorted) { - do { - if (dl->items[++r].pgno < most) { - if (++w != r) - dl->items[w] = dl->items[r]; - } - } while (r < dl->sorted); - dl->sorted = w; - } - while (r < dl->length) { - if (dl->items[++r].pgno < most) { - if (++w != r) - dl->items[w] = dl->items[r]; - } - } - dl->length = w; - mdbx_tassert(txn, txn->mt_parent || txn->tw.dirtyroom + dl->length == - txn->mt_env->me_options.dp_limit); - 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->items[1].pgno < dl->items[dl->length].pgno); - mdbx_tassert(txn, dl->sorted == dl->length); - - /* Scan dirtylist tail-forward and cutoff suitable pages. */ - while (dl->length && dl->items[dl->length].pgno == txn->mt_next_pgno - 1 && - dl->items[dl->length].ptr->mp_flags == (P_LOOSE | P_DIRTY)) { - MDBX_page *dp = dl->items[dl->length].ptr; - mdbx_debug("refund-sorted page %" PRIaPGNO, dp->mp_pgno); - mdbx_tassert(txn, dp->mp_pgno == dl->items[dl->length].pgno); - txn->mt_next_pgno -= 1; - 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; - mdbx_tassert(txn, txn->mt_parent || txn->tw.dirtyroom + dl->length == - txn->mt_env->me_options.dp_limit); - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - - /* 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 + dl->length == - txn->mt_env->me_options.dp_limit); - 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; - } - - if (before == txn->mt_next_pgno) - return false; - - if (txn->tw.spill_pages) - /* Squash deleted pagenums if we refunded any */ - mdbx_spill_purge(txn); - - return true; -} -#else /* MDBX_ENABLE_REFUND */ -static __inline bool mdbx_refund(MDBX_txn *txn) { - (void)txn; - /* No online auto-compactification. */ - return false; -} -#endif /* MDBX_ENABLE_REFUND */ - -static __cold void mdbx_kill_page(MDBX_env *env, MDBX_page *mp, pgno_t pgno, - unsigned npages) { - mdbx_debug("kill%s %u page %" PRIaPGNO, IS_DIRTY(mp) ? " dirty" : "", npages, - pgno); - 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)); - } -} - -/* Remove page from dirty list */ -static __inline void mdbx_page_wash(MDBX_txn *txn, const unsigned di, - MDBX_page *const mp, - const unsigned npages) { - mdbx_tassert(txn, di && di <= txn->tw.dirtylist->length && - txn->tw.dirtylist->items[di].ptr == mp); - mdbx_dpl_remove(txn->tw.dirtylist, di); - txn->tw.dirtyroom++; - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - txn->mt_env->me_options.dp_limit); - mp->mp_txnid = INVALID_TXNID; - mp->mp_flags = 0xFFFF; - VALGRIND_MAKE_MEM_UNDEFINED(mp, PAGEHDRSZ); - if (txn->mt_flags & MDBX_WRITEMAP) { - 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); - } else - mdbx_dpage_free(txn->mt_env, mp, npages); -} - -/* 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; - const bool is_dirty = IS_DIRTY(mp); - - if (is_dirty) { - mdbx_tassert(txn, !txn->tw.spill_pages || - !mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1)); - mdbx_tassert(txn, debug_dpl_find(txn->tw.dirtylist, pgno) == mp || - txn->mt_parent); - } else { - mdbx_tassert(txn, !debug_dpl_find(txn->tw.dirtylist, pgno)); - } - - const unsigned di = is_dirty ? mdbx_dpl_exist(txn->tw.dirtylist, pgno) : 0; - const unsigned si = (!is_dirty && txn->tw.spill_pages) - ? mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1) - : 0; - - if (MDBX_ENABLE_REFUND && unlikely(pgno + npages == txn->mt_next_pgno)) { - const char *kind; - if (di) { - mdbx_tassert(txn, txn->tw.dirtylist->items[di].ptr == mp); - if (unlikely(txn->tw.dirtylist->items[di].ptr != mp)) { - wrong_dirty: - mdbx_error("wrong dirty page 0x%p #%" PRIaPGNO, - __Wpedantic_format_voidptr(mp), pgno); - txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PROBLEM; - } - /* Страница испачкана в этой транзакции, но до этого могла быть - * аллоцирована, испачкана и пролита в одной из родительских транзакций. - * Её МОЖНО вытолкнуть в нераспределенный хвост. */ - kind = "dirty"; - /* Remove from dirty list */ - mdbx_page_wash(txn, di, mp, npages); - } else if (is_dirty) { - /* The page MUST BE from parent transaction. */ - if (mdbx_audit_enabled()) { - const MDBX_page *parent_dp = nullptr; - for (MDBX_txn *parent = txn->mt_parent; parent && !parent_dp; - parent = parent->mt_parent) { - mdbx_tassert(txn, - !parent->tw.spill_pages || - !mdbx_pnl_exist(parent->tw.spill_pages, pgno << 1)); - parent_dp = debug_dpl_find(parent->tw.dirtylist, pgno); - } - mdbx_tassert(txn, parent_dp == mp); - } - kind = "parent-dirty"; - } else if (si) { - /* Страница пролита в этой транзакции, следовательно она аллоцирована - * и запачкана в этой или одной из родительских транзакций. - * Её МОЖНО вытолкнуть в нераспределенный хвост. */ - kind = "spilled"; - mdbx_spill_remove(txn, si, npages); - } else { - for (MDBX_txn *parent = txn->mt_parent; - parent && (parent->mt_flags & MDBX_TXN_SPILLS); - parent = parent->mt_parent) - if (parent->tw.spill_pages && - mdbx_pnl_exist(parent->tw.spill_pages, pgno << 1)) { - /* Страница аллоцирована, запачкана и пролита в одной из родительских - * транзакций. Её МОЖНО вытолкнуть в нераспределенный хвост. */ - kind = "parent-spilled"; - goto refund; - } - /* Страница используется (входит в MVCC-снимки доступные читателям). - * Её НЕЛЬЗЯ вытолкнуть в нераспределенных хвост. */ - goto retire; - } - refund: - mdbx_debug("refunded %u %s page %" PRIaPGNO, npages, kind, pgno); - txn->mt_next_pgno = pgno; - mdbx_refund(txn); - return MDBX_SUCCESS; - } - - if (is_dirty) { - if (di) { - /* Dirty page from this transaction */ - mdbx_tassert(txn, txn->tw.dirtylist->items[di].ptr == mp); - if (unlikely(txn->tw.dirtylist->items[di].ptr != mp)) - goto wrong_dirty; - - /* If suitable we can reuse it through loose list */ - if (likely( - npages == 1 && - txn->tw.loose_count < txn->mt_env->me_options.dp_loose_limit && - (!MDBX_ENABLE_REFUND || - /* skip pages near to the end in favor of compactification */ - txn->mt_next_pgno > - pgno + txn->mt_env->me_options.dp_loose_limit || - txn->mt_next_pgno <= txn->mt_env->me_options.dp_loose_limit))) { - mdbx_debug("loosen dirty page %" PRIaPGNO, pgno); - mp->mp_flags = P_LOOSE | P_DIRTY; - mp->mp_next = txn->tw.loose_pages; - txn->tw.loose_pages = mp; - txn->tw.loose_count++; -#if MDBX_ENABLE_REFUND - txn->tw.loose_refund_wl = (pgno + 2 > txn->tw.loose_refund_wl) - ? pgno + 2 - : txn->tw.loose_refund_wl; -#endif /* MDBX_ENABLE_REFUND */ - if (MDBX_DEBUG || unlikely(txn->mt_env->me_flags & MDBX_PAGEPERTURB)) - memset(page_data(mp), -1, txn->mt_env->me_psize - PAGEHDRSZ); - VALGRIND_MAKE_MEM_NOACCESS(page_data(mp), - txn->mt_env->me_psize - PAGEHDRSZ); - ASAN_POISON_MEMORY_REGION(page_data(mp), - txn->mt_env->me_psize - PAGEHDRSZ); - return MDBX_SUCCESS; - } - -#if !MDBX_DEBUG && !defined(MDBX_USE_VALGRIND) && !defined(__SANITIZE_ADDRESS__) - if (unlikely(txn->mt_env->me_flags & MDBX_PAGEPERTURB)) -#endif - { - /* Страница могла быть изменена в одной из родительских транзакций, - * в том числе, позже выгружена и затем снова загружена и изменена. - * В обоих случаях её нельзя затирать на диске и помечать недоступной - * в asan и/или valgrind */ - for (MDBX_txn *parent = txn->mt_parent; - parent && (parent->mt_flags & MDBX_TXN_SPILLS); - parent = parent->mt_parent) { - if (parent->tw.spill_pages && - mdbx_pnl_intersect(parent->tw.spill_pages, pgno << 1, - npages << 1)) - goto skip_invalidate; - if (mdbx_dpl_intersect(parent->tw.dirtylist, pgno, npages)) - goto skip_invalidate; - } - -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - if (MDBX_DEBUG || unlikely(txn->mt_env->me_flags & MDBX_PAGEPERTURB)) -#endif - mdbx_kill_page(txn->mt_env, mp, pgno, npages); - if (!(txn->mt_flags & MDBX_WRITEMAP)) { - VALGRIND_MAKE_MEM_NOACCESS(page_data(pgno2page(txn->mt_env, pgno)), - pgno2bytes(txn->mt_env, npages) - - PAGEHDRSZ); - ASAN_POISON_MEMORY_REGION(page_data(pgno2page(txn->mt_env, pgno)), - pgno2bytes(txn->mt_env, npages) - - PAGEHDRSZ); - } - } - skip_invalidate: - /* Remove from dirty list */ - mdbx_page_wash(txn, di, mp, npages); - } else { - /* Dirty page MUST BE a clone from (one of) parent transaction(s). */ - if (mdbx_audit_enabled()) { - const MDBX_page *parent_dp = nullptr; - /* Check parent(s)'s dirty lists. */ - for (MDBX_txn *parent = txn->mt_parent; parent && !parent_dp; - parent = parent->mt_parent) { - mdbx_tassert(txn, - !parent->tw.spill_pages || - !mdbx_pnl_exist(parent->tw.spill_pages, pgno << 1)); - parent_dp = debug_dpl_find(parent->tw.dirtylist, pgno); - } - mdbx_tassert(txn, parent_dp == mp); - } - } - - reclaim: - mdbx_debug("reclaim %u %s page %" PRIaPGNO, npages, "dirty", pgno); - int rc = mdbx_pnl_insert_range(&txn->tw.reclaimed_pglist, pgno, npages); - mdbx_tassert(txn, - mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - return rc; - } - - if (si) { - /* Page ws spilled in this txn */ - mdbx_spill_remove(txn, si, npages); - /* Страница могла быть выделена и затем пролита в этой транзакции, - * тогда её необходимо поместить в reclaimed-список. - * Либо она могла быть выделена в одной из родительских транзакций и затем - * пролита в этой транзакции, тогда её необходимо поместить в retired-список - * для последующей фильтрации при коммите. */ - for (MDBX_txn *parent = txn->mt_parent; parent; - parent = parent->mt_parent) { - if (mdbx_dpl_exist(parent->tw.dirtylist, pgno)) - goto retire; - } - /* Страница точно была выделена в этой транзакции - * и теперь может быть использована повторно. */ - goto reclaim; - } else { - /* Страница может входить в доступный читателям MVCC-снимок, либо же она - * могла быть выделена, а затем пролита в одной из родительских транзакций. - * Поэтому пока помещаем её в retired-список, который будет фильтроваться - * относительно dirty- и spilled-списков родительских транзакций при коммите - * дочерних транзакций, либо же будет записан в GC в неизменном виде. */ - } - -retire: - mdbx_debug("retire %u page %" PRIaPGNO, npages, pgno); - int rc = mdbx_pnl_append_range(false, &txn->tw.retired_pages, pgno, npages); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - return rc; -} - -static int mdbx_page_retire(MDBX_cursor *mc, MDBX_page *mp) { - 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 >= mp->mp_pages); - mc->mc_db->md_overflow_pages -= IS_OVERFLOW(mp) ? mp->mp_pages : 0; - return mdbx_page_loose(mc->mc_txn, mp); -} - -static __must_check_result __always_inline int -mdbx_retire_pgno(MDBX_cursor *mc, const pgno_t pgno) { - MDBX_page *mp; - int rc; - if (mdbx_audit_enabled()) { - const unsigned save_flags = mc->mc_flags; - mc->mc_flags |= C_RETIRING; - rc = mdbx_page_get(mc, pgno, &mp, NULL, mc->mc_txn->mt_txnid); - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_page_retire(mc, mp); - mc->mc_flags = (mc->mc_flags & ~C_RETIRING) | (save_flags & C_RETIRING); - } else { - rc = mdbx_page_get(mc, pgno, &mp, NULL, mc->mc_txn->mt_txnid); - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_page_retire(mc, mp); - } - return rc; -} - -/* Toggle 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. */ -static void mdbx_cursor_xkeep(MDBX_cursor *mc, unsigned pflags) { - const unsigned mask = P_SUBP | P_DIRTY | P_LOOSE | P_KEEP; - if (mc->mc_flags & C_INITIALIZED) { - MDBX_cursor *m3 = mc; - for (;;) { - MDBX_page *mp = NULL; - for (unsigned j = 0; j < m3->mc_snum; j++) { - mp = m3->mc_pg[j]; - if ((mp->mp_flags & mask) == pflags) - mp->mp_flags ^= P_KEEP; - } - if (!(mp && IS_LEAF(mp))) - break; - /* Proceed to mx if it is at a sub-database */ - MDBX_xcursor *mx = m3->mc_xcursor; - if (!(mx && (mx->mx_cursor.mc_flags & C_INITIALIZED))) - break; - const unsigned nkeys = page_numkeys(mp); - unsigned ki = m3->mc_ki[m3->mc_top]; - mdbx_cassert(mc, nkeys > 0 && - (ki < nkeys || - (ki == nkeys && (mx->mx_cursor.mc_flags & C_EOF)))); - ki -= ki >= nkeys; - if (!(node_flags(page_node(mp, ki)) & F_SUBDATA)) - break; - m3 = &mx->mx_cursor; - } - } -} - -/* Mark pages seen by cursors: First m0, then tracked cursors - * [in] all No shortcuts. Needed except after a full mdbx_page_flush(). */ -static void mdbx_txn_xkeep(MDBX_txn *txn, MDBX_cursor *m0, - const unsigned pflags, const bool all) { - if (m0) - mdbx_cursor_xkeep(m0, pflags); - - for (unsigned i = FREE_DBI; i < txn->mt_numdbs; ++i) - if (txn->mt_dbistate[i] & DBI_DIRTY) - for (MDBX_cursor *mc = txn->tw.cursors[i]; mc; mc = mc->mc_next) - if (mc != m0) - mdbx_cursor_xkeep(mc, pflags); - - if (all) { - /* Mark dirty root pages */ - const unsigned mask = P_SUBP | P_DIRTY | P_LOOSE | P_KEEP; - for (unsigned i = 0; i < txn->mt_numdbs; i++) { - if (txn->mt_dbistate[i] & DBI_DIRTY) { - pgno_t pgno = txn->mt_dbs[i].md_root; - if (pgno == P_INVALID) - continue; - MDBX_page *dp = mdbx_dpl_find(txn->tw.dirtylist, pgno); - if (dp && (dp->mp_flags & mask) == pflags) - dp->mp_flags ^= P_KEEP; - } - } - } -} - -/* 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. */ -static int mdbx_txn_spill(MDBX_txn *txn, MDBX_cursor *m0, unsigned need) { -#ifndef MDBX_DEBUG_SPILLING - if (likely(txn->tw.dirtyroom > need)) - return MDBX_SUCCESS; - unsigned spill = need - txn->tw.dirtyroom; -#else - /* spill at least one page if defined MDBX_DEBUG_SPILLING */ - unsigned spill = (need > txn->tw.dirtyroom) ? need - txn->tw.dirtyroom : 1; -#endif /* MDBX_DEBUG_SPILLING */ - - const unsigned dirty = txn->tw.dirtylist->length; - const unsigned spill_min = - txn->mt_env->me_options.spill_min_denominator - ? dirty / txn->mt_env->me_options.spill_min_denominator - : 0; - const unsigned spill_max = - dirty - (txn->mt_env->me_options.spill_max_denominator - ? dirty / txn->mt_env->me_options.spill_max_denominator - : 0); - spill = (spill > spill_min) ? spill : spill_min; - spill = (spill < spill_max) ? spill : spill_max; - if (!spill) - return MDBX_SUCCESS; - - mdbx_notice("spilling %u dirty-entries (have %u dirty-room, need %u)", spill, - txn->tw.dirtyroom, need); - mdbx_tassert(txn, txn->tw.dirtylist->length >= spill); - - int rc; - if (!txn->tw.spill_pages) { - txn->tw.spill_least_removed = INT_MAX; - txn->tw.spill_pages = mdbx_pnl_alloc(spill); - if (unlikely(!txn->tw.spill_pages)) { - rc = MDBX_ENOMEM; - goto bailout; - } - } else { - /* purge deleted slots */ - mdbx_spill_purge(txn); - rc = mdbx_pnl_reserve(&txn->tw.spill_pages, spill); - (void)rc /* ignore since the resulting list may be shorter - and mdbx_pnl_append() will increase pnl on demand */ - ; - } - - /* Preserve pages which may soon be dirtied again */ - mdbx_txn_xkeep(txn, m0, P_DIRTY, true); - - MDBX_dpl *const dl = mdbx_dpl_sort(txn->tw.dirtylist); - /* Save the page IDs of all the pages we're flushing */ - /* flush from the tail forward, this saves a lot of shifting later on. */ - const unsigned dl_len_before = dl->length; - unsigned spilled = 0; - unsigned keep = dl_len_before; - for (; keep && spill; keep--) { - const pgno_t pgno = dl->items[keep].pgno; - MDBX_page *dp = dl->items[keep].ptr; - const unsigned npages = IS_OVERFLOW(dp) ? dp->mp_pages : 1; - if (dp->mp_flags & (P_LOOSE | P_KEEP)) { - mdbx_debug("skip %s %u page %" PRIaPGNO, - (dp->mp_flags & P_LOOSE) ? "loose" : "keep", npages, - dp->mp_pgno); - skip: - continue; - } - /* Can't spill twice, - * make sure it's not already in a parent's spill list(s). */ - MDBX_txn *parent = txn->mt_parent; - if (parent && (parent->mt_flags & MDBX_TXN_SPILLS)) { - do - if (parent->tw.spill_pages && - mdbx_pnl_intersect(parent->tw.spill_pages, pgno << 1, - npages << 1)) { - mdbx_debug("skip parent-spilled %u page %" PRIaPGNO, npages, pgno); - dp->mp_flags |= P_KEEP; - goto skip; - } - while ((parent = parent->mt_parent) != nullptr); - } - mdbx_debug("spill %u page %" PRIaPGNO, npages, dp->mp_pgno); - rc = mdbx_pnl_append_range(true, &txn->tw.spill_pages, pgno << 1, npages); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - spill--; - spilled += 1; - } - mdbx_pnl_sort(txn->tw.spill_pages); - - /* Flush the spilled part of dirty list */ - rc = mdbx_page_flush(txn, keep); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - /* Reset any dirty pages we kept that page_flush didn't see */ - mdbx_tassert(txn, dl_len_before - spilled == dl->length); - mdbx_txn_xkeep(txn, m0, P_DIRTY | P_KEEP, keep > 0); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - -bailout: - txn->mt_flags |= rc ? MDBX_TXN_ERROR : MDBX_TXN_SPILLS; - return rc; -} - -static int mdbx_cursor_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; - if (txn->mt_flags & MDBX_WRITEMAP) - return MDBX_SUCCESS; - - /* Estimate how much space this operation will take: */ - /* 1) Max b-tree height, reasonable enough with including dups' sub-tree */ - unsigned need = CURSOR_STACK + 3; - /* 2) GC/FreeDB for any payload */ - if (mc->mc_dbi > FREE_DBI) { - need += txn->mt_dbs[FREE_DBI].md_depth + 3; - /* 3) Named DBs also dirty the main DB */ - if (mc->mc_dbi > MAIN_DBI) - need += txn->mt_dbs[MAIN_DBI].md_depth + 3; - } - /* 4) Factor the key+data which to be put in */ - need += bytes2pgno(txn->mt_env, node_size(key, data)) + 1; - return mdbx_txn_spill(txn, mc, need); -} - -/*----------------------------------------------------------------------------*/ - -static __always_inline bool meta_bootid_match(const MDBX_meta *meta) { - return memcmp(&meta->mm_bootid, &bootid, 16) == 0 && - (bootid.x | bootid.y) != 0; -} - -static bool meta_weak_acceptable(const MDBX_env *env, const MDBX_meta *meta, - const int lck_exclusive) { - return lck_exclusive ? /* exclusive lock */ meta_bootid_match(meta) - : /* db already opened */ env->me_lck && - (env->me_lck->mti_envmode.weak & 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_memory_fence(mo_AcquireRelease, false); - txnid_t a = unaligned_peek_u64(4, &meta->mm_txnid_a); - txnid_t b = unaligned_peek_u64(4, &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, unaligned_peek_u64(4, meta->mm_txnid_a) < txnid && - unaligned_peek_u64(4, meta->mm_txnid_b) < txnid); - (void)env; - unaligned_poke_u64(4, meta->mm_txnid_b, 0); - mdbx_memory_fence(mo_AcquireRelease, true); - unaligned_poke_u64(4, 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, unaligned_peek_u64(4, meta->mm_txnid_a) == txnid); - mdbx_assert(env, unaligned_peek_u64(4, meta->mm_txnid_b) < txnid); - (void)env; - mdbx_jitter4testing(true); - memcpy(&meta->mm_bootid, &bootid, 16); - unaligned_poke_u64(4, meta->mm_txnid_b, txnid); - mdbx_memory_fence(mo_AcquireRelease, true); -} - -static __inline void mdbx_meta_set_txnid(const MDBX_env *env, MDBX_meta *meta, - txnid_t txnid) { - mdbx_assert(env, !env->me_map || 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 */ - memcpy(&meta->mm_bootid, &bootid, 16); - unaligned_poke_u64(4, meta->mm_txnid_a, txnid); - unaligned_poke_u64(4, meta->mm_txnid_b, 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 (unaligned_peek_u64(4, 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_TXN_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 atomic_store64(&env->me_lckless_stub.oldest, edge, - mo_AcquireRelease); - - const txnid_t last_oldest = - atomic_load64(&lck->mti_oldest_reader, mo_AcquireRelease); - 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 = - atomic_load32(&lck->mti_readers_refresh_flag, mo_AcquireRelease); - mdbx_jitter4testing(false); - if (snap_readers_refresh_flag == nothing_changed) - return last_oldest; - - txnid_t oldest = edge; - atomic_store32(&lck->mti_readers_refresh_flag, nothing_changed, - mo_AcquireRelease); - const unsigned snap_nreaders = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; ++i) { - if (atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease)) { - /* 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.weak); - atomic_store64(&lck->mti_oldest_reader, oldest, mo_AcquireRelease); - } - 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 = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease)) { - /* mdbx_jitter4testing(true); */ - const pgno_t snap_pages = atomic_load32( - &lck->mti_readers[i].mr_snapshot_pages_used, mo_Relaxed); - const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - if (unlikely( - snap_pages != - atomic_load32(&lck->mti_readers[i].mr_snapshot_pages_used, - mo_AcquireRelease) || - snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) - goto retry; - if (largest < snap_pages && - atomic_load64(&lck->mti_oldest_reader, mo_AcquireRelease) <= - /* 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; - if (unlikely(txn->tw.dirtyroom == 0)) { - mdbx_error("Dirtyroom is depleted, DPL length %u", - txn->tw.dirtylist->length); - return MDBX_TXN_FULL; - } - const int rc = mdbx_dpl_append(txn, mp->mp_pgno, mp); - if (unlikely(rc != MDBX_SUCCESS)) { - txn->mt_flags |= MDBX_TXN_ERROR; - return rc; - } - txn->tw.dirtyroom--; - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - txn->mt_env->me_options.dp_limit); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - 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 __cold int 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, const bool implicit) { - if ((env->me_flags & MDBX_WRITEMAP) && env->me_unsynced_pages->weak) { - 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); - const size_t prev_size = env->me_dxb_mmap.current; - const size_t prev_limit = env->me_dxb_mmap.limit; - const void *const prev_addr = env->me_map; - - mdbx_verbose("resize datafile/mapping: " - "present %" PRIuPTR " -> %" PRIuPTR ", " - "limit %" PRIuPTR " -> %" PRIuPTR, - prev_size, size_bytes, prev_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); - -#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 - * corresponding 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; - } - const bool mapping_can_be_moved = !implicit; -#else /* Windows */ - /* Acquire guard to avoid collision between read and write txns - * around env->me_dbgeo */ - bool mapping_can_be_moved = false; - 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; - - if (limit_bytes != env->me_dxb_mmap.limit && env->me_lck && !implicit) { - int err = mdbx_rdt_lock(env) /* lock readers table until remap done */; - if (unlikely(MDBX_IS_ERROR(err))) { - rc = err; - goto bailout; - } - - /* looking for readers from this process */ - MDBX_lockinfo *const lck = env->me_lck; - const unsigned snap_nreaders = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - mapping_can_be_moved = true; - for (unsigned i = 0; i < snap_nreaders; ++i) { - if (lck->mti_readers[i].mr_pid.weak == env->me_pid && - lck->mti_readers[i].mr_tid.weak != mdbx_thread_self()) { - /* the base address of the mapping can't be changed since - * the other reader thread from this process exists. */ - mdbx_rdt_unlock(env); - mapping_can_be_moved = false; - break; - } - } - } - -#endif /* ! Windows */ - - 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->weak > size_pgno) - env->me_discarded_tail->weak = size_pgno; - } - - rc = mdbx_mresize(env->me_flags, &env->me_dxb_mmap, size_bytes, limit_bytes, - mapping_can_be_moved); - if (rc == MDBX_SUCCESS && (env->me_flags & MDBX_NORDAHEAD) == 0) { - const int readahead = - mdbx_is_readahead_reasonable(size_bytes, -(intptr_t)prev_size); - 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->weak = 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", - prev_size, size_bytes, prev_limit, limit_bytes, rc); - } else { - mdbx_warning("unable resize datafile/mapping: " - "present %" PRIuPTR " -> %" PRIuPTR ", " - "limit %" PRIuPTR " -> %" PRIuPTR ", errcode %d", - prev_size, size_bytes, prev_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 - if (env->me_lck && mapping_can_be_moved) - mdbx_rdt_unlock(env); - 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 __cold int mdbx_mapresize_implicit(MDBX_env *env, const pgno_t used_pgno, - const pgno_t size_pgno, - const pgno_t limit_pgno) { - const pgno_t mapped_pgno = bytes2pgno(env, env->me_dxb_mmap.limit); - mdbx_assert(env, mapped_pgno >= used_pgno); - return mdbx_mapresize( - env, used_pgno, size_pgno, - (size_pgno > mapped_pgno) - ? limit_pgno - : /* The actual mapsize may be less since the geo.upper may be changed - by other process. So, avoids remapping until it necessary. */ - mapped_pgno, - true); -} - -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 (unlikely(META_IS_STEADY(meta)) && - mdbx_meta_txnid_stable(env, meta) <= last_steady) { - mdbx_warning("wipe txn #%" PRIaTXN ", meta %" PRIaPGNO, last_steady, - data_page(meta)->mp_pgno); - if (env->me_flags & MDBX_WRITEMAP) - unaligned_poke_u64(4, 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 MDBX_USE_SYNCFILERANGE - static bool syncfilerange_unavailable; - if (likely(!syncfilerange_unavailable)) { - if (likely(!sync_file_range( - env->me_lazy_fd, 0, pgno2bytes(env, NUM_METAS), - SYNC_FILE_RANGE_WRITE | SYNC_FILE_RANGE_WAIT_AFTER))) - goto done_filesync; - err = errno; - if (ignore_enosys(err) != MDBX_RESULT_TRUE) - return err; - syncfilerange_unavailable = true; - } -#endif /* MDBX_USE_SYNCFILERANGE */ - err = mdbx_fsync(env->me_lazy_fd, MDBX_SYNC_DATA); - if (unlikely(err != MDBX_SUCCESS)) - return err; -#if MDBX_USE_SYNCFILERANGE - done_filesync: -#endif /* MDBX_USE_SYNCFILERANGE */ - mdbx_flush_incoherent_mmap(env->me_map, pgno2bytes(env, NUM_METAS), - env->me_os_psize); - } - - if (likely(env->me_lck)) - /* force oldest refresh */ - atomic_store32(&env->me_lck->mti_readers_refresh_flag, true, - mo_AcquireRelease); - return MDBX_SUCCESS; -} - -static __inline txnid_t pp_txnid4chk(const MDBX_page *mp, const MDBX_txn *txn) { - return IS_DIRTY(mp) - ? txn->mt_txnid - 1 - : (/* maybe zero in legacy DB */ mp->mp_txnid ? mp->mp_txnid - : MIN_TXNID); -} - -static __inline txnid_t pp_txnid2chk(const MDBX_txn *txn) { -#ifdef MDBX_DEBUG_LEGACY - if (txn->mt_txnid < 2222) - return 0; -#endif - return txn->mt_txnid; -} - -/* 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 *const txn = mc->mc_txn; - MDBX_env *const env = txn->mt_env; - MDBX_page *np; - - const unsigned coalesce_threshold = - env->me_maxgc_ov1page - env->me_maxgc_ov1page / 4; - if (likely(flags & MDBX_ALLOC_GC)) { - flags |= env->me_flags & (MDBX_COALESCE | MDBX_LIFORECLAIM); - if (MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) > coalesce_threshold) - flags &= ~MDBX_COALESCE; - if (unlikely( - /* If mc is updating the GC, then the retired-list cannot play - catch-up with itself by growing while trying to save it. */ - (mc->mc_flags & C_RECLAIMING) || - /* avoid (recursive) search inside empty tree and while tree is - updating, https://github.com/erthink/libmdbx/issues/31 */ - txn->mt_dbs[FREE_DBI].md_entries == 0 || - /* If our dirty list is already full, we can't touch GC */ - (txn->tw.dirtyroom < txn->mt_dbs[FREE_DBI].md_depth && - !(txn->mt_dbistate[FREE_DBI] & DBI_DIRTY)))) - flags &= ~(MDBX_ALLOC_GC | MDBX_COALESCE); - } - - 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 MDBX_ENABLE_REFUND - if (txn->tw.loose_refund_wl > txn->mt_next_pgno) { - mdbx_refund(txn); - if (unlikely(!txn->tw.loose_pages)) - goto no_loose; - } -#endif /* MDBX_ENABLE_REFUND */ - - 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; - } - } -#if MDBX_ENABLE_REFUND -no_loose: -#endif /* MDBX_ENABLE_REFUND */ - - mdbx_tassert(txn, - mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - 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) { /* hsr-kick retry loop */ - 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 ((flags & (MDBX_COALESCE | MDBX_ALLOC_CACHE)) == MDBX_ALLOC_CACHE && - re_len > wanna_range) { - 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) - : atomic_load64(env->me_oldest, mo_AcquireRelease); - 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 < MIN_TXNID || last > MAX_TXNID)) { - 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, pp_txnid4chk(np, txn))) != 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 tw.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); - if (unlikely(/* resulting list is tool long */ gc_len + - MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) > - env->me_options.rp_augment_limit) && - (((/* not a slot-request from gc-update */ - mp || (flags & MDBX_LIFORECLAIM) == 0 || - (txn->tw.lifo_reclaimed && - MDBX_PNL_SIZE(txn->tw.lifo_reclaimed))) && - /* have enough unallocated space */ pgno_add( - txn->mt_next_pgno, num) <= txn->mt_geo.upper) || - gc_len + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) >= - MDBX_PGL_LIMIT / 16 * 15)) { - /* Stop reclaiming to avoid overflow the page list. - * This is a rare case while search for a continuously multi-page region - * in a large database. https://github.com/erthink/libmdbx/issues/123 */ - mdbx_debug("stop reclaiming to avoid PNL overflow: %u (current) + %u " - "(chunk) -> %u", - MDBX_PNL_SIZE(txn->tw.reclaimed_pglist), gc_len, - gc_len + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist)); - flags &= ~(MDBX_ALLOC_GC | MDBX_COALESCE); - break; - } - 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); - for (unsigned 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; - } - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - - re_len = MDBX_PNL_SIZE(re_list); - mdbx_tassert(txn, re_len == 0 || re_list[re_len] < txn->mt_next_pgno); - if (MDBX_ENABLE_REFUND && 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); - } - - /* Done for a kick-reclaim mode, actually no page needed */ - if (unlikely((flags & MDBX_ALLOC_CACHE) == 0)) - return MDBX_SUCCESS; - - /* Don't try to coalesce too much. */ - if (re_len /* current size */ > coalesce_threshold || - (re_len > prev_re_len && re_len - prev_re_len /* delta from prev */ >= - coalesce_threshold / 2)) - flags &= ~MDBX_COALESCE; - } - - if (F_ISSET(flags, MDBX_COALESCE | MDBX_ALLOC_CACHE)) { - flags -= MDBX_COALESCE; - continue; - } - - /* 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 = - atomic_load32(env->me_autosync_threshold, mo_Relaxed); - const uint64_t autosync_period = - atomic_load64(env->me_autosync_period, mo_Relaxed); - /* 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 threshold(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 && - atomic_load32(env->me_unsynced_pages, mo_Relaxed) >= - autosync_threshold) || - (autosync_period && - mdbx_osal_monotime() - - atomic_load64(env->me_sync_timestamp, mo_Relaxed) >= - 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_kick_longlived_readers(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_kick_longlived_readers(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_implicit(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 - MDBX_ENABLE_REFUND)); - 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; - if (unlikely(txn->tw.dirtyroom < 1)) - return MDBX_TXN_FULL; - mdbx_ensure(env, pgno >= NUM_METAS); - if (env->me_flags & MDBX_WRITEMAP) { - np = pgno2page(env, pgno); - /* LY: reset no-access flag from mdbx_page_loose() */ - 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 tw.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 - MDBX_ENABLE_REFUND)); - } 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; - if ((mdbx_assert_enabled() || mdbx_audit_enabled()) && num > 1) { - np->mp_pages = num; - np->mp_flags = P_OVERFLOW; - } - 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 - MDBX_ENABLE_REFUND)); - 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_tassert(txn, !IS_DIRTY(mp)); - const pgno_t spilled_pgno = mp->mp_pgno << 1; - const MDBX_txn *scan = txn; - do { - if ((scan->mt_flags & MDBX_TXN_SPILLS) == 0) - break; - if (!scan->tw.spill_pages) - continue; - const unsigned si = mdbx_pnl_exist(scan->tw.spill_pages, spilled_pgno); - if (!si) - continue; - const unsigned npages = IS_OVERFLOW(mp) ? mp->mp_pages : 1; - MDBX_page *np = mp; - if ((txn->mt_flags & MDBX_WRITEMAP) == 0) { - np = mdbx_page_malloc(txn, npages); - if (unlikely(!np)) - return MDBX_ENOMEM; - if (likely(npages == 1)) - mdbx_page_copy(np, mp, txn->mt_env->me_psize); - else - memcpy(np, mp, pgno2bytes(txn->mt_env, npages)); - } - mdbx_debug("unspill page %" PRIaPGNO, mp->mp_pgno); - if (scan == 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. */ - mdbx_spill_remove(txn, si, npages); - } /* otherwise, if belonging to a parent txn, the - * page remains spilled until child commits */ - - int rc = mdbx_page_dirty(txn, np); - if (unlikely(rc != MDBX_SUCCESS)) { - if ((txn->mt_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(txn->mt_env, np, npages); - return rc; - } - *ret = np; - break; - } while ((scan = scan->mt_parent) != nullptr); - 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 *const mp = mc->mc_pg[mc->mc_top], *np; - MDBX_txn *txn = mc->mc_txn; - MDBX_cursor *m2, *m3; - pgno_t pgno; - int rc; - - if (mdbx_assert_enabled()) { - if (mc->mc_dbi >= CORE_DBS) { - if (mc->mc_flags & C_SUB) { - 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); - mdbx_cassert(mc, *couple->outer.mc_dbistate & DBI_DIRTY); - } else { - mdbx_cassert(mc, *mc->mc_dbistate & DBI_DIRTY); - } - mdbx_cassert(mc, mc->mc_txn->mt_flags & MDBX_TXN_DIRTY); - } - mdbx_cassert(mc, !IS_OVERFLOW(mp)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - } - - if (!IS_DIRTY(mp)) { - 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); - /* 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_PGL_LIMIT + MDBX_PNL_GRANULATE); - /* No - copy it */ - np = mdbx_page_malloc(txn, 1); - if (unlikely(!np)) { - rc = MDBX_ENOMEM; - goto fail; - } - /* insert a clone of parent's dirty page, so don't touch dirtyroom */ - rc = mdbx_dpl_append(txn, pgno, np); - if (unlikely(rc)) { - mdbx_dpage_free(txn->mt_env, np, 1); - goto fail; - } - - np->mp_pgno = pgno; - np->mp_txnid = INVALID_TXNID; - np->mp_flags |= P_DIRTY; - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - } 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->tw.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, bool force, - bool 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 && atomic_load32(env->me_unsynced_pages, mo_AcquireRelease) == 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 = atomic_load32(env->me_unsynced_pages, mo_Relaxed); - if (!META_IS_STEADY(head) || unsynced_pages) { - const pgno_t autosync_threshold = - atomic_load32(env->me_autosync_threshold, mo_Relaxed); - const uint64_t autosync_period = - atomic_load64(env->me_autosync_period, mo_Relaxed); - if (force || (autosync_threshold && unsynced_pages >= autosync_threshold) || - (autosync_period && - mdbx_osal_monotime() - - atomic_load64(env->me_sync_timestamp, mo_Relaxed) >= - 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) == 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_fsync(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 = atomic_load32(env->me_unsynced_pages, mo_Relaxed); - } - 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) == 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 (atomic_load32(env->me_meta_sync_txnid, mo_Relaxed) != - (uint32_t)head_txnid) { - rc = (flags & MDBX_WRITEMAP) - ? mdbx_msync(&env->me_dxb_mmap, 0, - pgno_align2os_bytes(env, NUM_METAS), false) - : mdbx_fsync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - if (likely(rc == MDBX_SUCCESS)) - atomic_store32(env->me_meta_sync_txnid, (uint32_t)head_txnid, - mo_Relaxed); - } - } - if (need_unlock) - mdbx_txn_unlock(env); - return rc; -} - -static __inline int check_env(const MDBX_env *env) { - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature.weak != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_ENV_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - ((MDBX_env *)env)->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_ENV_CHECKPID */ - - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) - return MDBX_PANIC; - - return MDBX_SUCCESS; -} - -__cold int mdbx_env_sync_ex(MDBX_env *env, bool force, bool nonblock) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - return mdbx_env_sync_internal(env, force, nonblock); -} - -__cold int mdbx_env_sync(MDBX_env *env) { return __inline_mdbx_env_sync(env); } - -__cold int mdbx_env_sync_poll(MDBX_env *env) { - return __inline_mdbx_env_sync_poll(env); -} - -/* Back up parent txn's cursors, then grab the originals for tracking */ -static int mdbx_cursor_shadow(MDBX_txn *parent, MDBX_txn *nested) { - for (int i = parent->mt_numdbs; --i >= 0;) { - nested->tw.cursors[i] = NULL; - MDBX_cursor *mc = parent->tw.cursors[i]; - if (mc != NULL) { - size_t size = mc->mc_xcursor ? sizeof(MDBX_cursor) + sizeof(MDBX_xcursor) - : sizeof(MDBX_cursor); - for (MDBX_cursor *bk; mc; mc = bk->mc_next) { - bk = mc; - if (mc->mc_signature != MDBX_MC_LIVE) - continue; - bk = mdbx_malloc(size); - if (unlikely(!bk)) - return MDBX_ENOMEM; - *bk = *mc; - mc->mc_backup = bk; - /* 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 = nested; - mc->mc_db = &nested->mt_dbs[i]; - mc->mc_dbistate = &nested->mt_dbistate[i]; - MDBX_xcursor *mx = mc->mc_xcursor; - if (mx != NULL) { - *(MDBX_xcursor *)(bk + 1) = *mx; - mx->mx_cursor.mc_txn = nested; - } - mc->mc_next = nested->tw.cursors[i]; - nested->tw.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, const bool merge) { - mdbx_tassert(txn, (txn->mt_flags & MDBX_TXN_RDONLY) == 0); - for (int i = txn->mt_numdbs; --i >= 0;) { - MDBX_cursor *next, *mc = txn->tw.cursors[i]; - if (!mc) - continue; - txn->tw.cursors[i] = NULL; - do { - const unsigned stage = mc->mc_signature; - MDBX_cursor *bk = mc->mc_backup; - next = mc->mc_next; - mdbx_ensure(txn->mt_env, - stage == MDBX_MC_LIVE || (stage == MDBX_MC_WAIT4EOT && bk)); - mdbx_cassert(mc, mc->mc_dbi == (unsigned)i); - if (bk) { - MDBX_xcursor *mx = mc->mc_xcursor; - mdbx_cassert(mc, mx == bk->mc_xcursor); - mdbx_tassert(txn, txn->mt_parent != NULL); - mdbx_ensure(txn->mt_env, bk->mc_signature == MDBX_MC_LIVE); - if (stage == MDBX_MC_WAIT4EOT /* Cursor was closed by user */) - mc->mc_signature = stage /* Promote closed state to parent txn */; - else if (merge) { - /* Restore pointers 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_dbistate = bk->mc_dbistate; - if (mx) { - if (mx != bk->mc_xcursor) { - *bk->mc_xcursor = *mx; - mx = bk->mc_xcursor; - } - mx->mx_cursor.mc_txn = bk->mc_txn; - } - } else { - /* Restore from backup, i.e. rollback/abort nested txn */ - *mc = *bk; - if (mx) - *mx = *(MDBX_xcursor *)(bk + 1); - } - bk->mc_signature = 0; - mdbx_free(bk); - } else { - mdbx_ensure(txn->mt_env, stage == MDBX_MC_LIVE); - mc->mc_signature = MDBX_MC_READY4CLOSE /* Cursor may be reused */; - mc->mc_flags = 0 /* reset C_UNTRACK */; - } - } while ((mc = next) != 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 = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease) == - env->me_pid) { - /* mdbx_jitter4testing(true); */ - const pgno_t snap_pages = atomic_load32( - &lck->mti_readers[i].mr_snapshot_pages_used, mo_Relaxed); - const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - if (unlikely( - snap_pages != - atomic_load32(&lck->mti_readers[i].mr_snapshot_pages_used, - mo_AcquireRelease) || - snap_txnid != safe64_read(&lck->mti_readers[i].mr_txnid))) - goto retry; - if (largest < snap_pages && - atomic_load64(&lck->mti_oldest_reader, mo_AcquireRelease) <= - /* ignore pending updates */ snap_txnid && - snap_txnid <= MAX_TXNID) - 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__ */ - -typedef struct { - int err; - MDBX_reader *rslot; -} bind_rslot_result; - -static bind_rslot_result bind_rslot(MDBX_env *env, const uintptr_t tid) { - mdbx_assert(env, env->me_lck); - 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); - - bind_rslot_result result = {mdbx_rdt_lock(env), nullptr}; - if (unlikely(MDBX_IS_ERROR(result.err))) - return result; - if (unlikely(env->me_flags & MDBX_FATAL_ERROR)) { - mdbx_rdt_unlock(env); - result.err = MDBX_PANIC; - return result; - } - if (unlikely(!env->me_map)) { - mdbx_rdt_unlock(env); - result.err = MDBX_EPERM; - return result; - } - - if (unlikely(env->me_live_reader != env->me_pid)) { - result.err = mdbx_rpid_set(env); - if (unlikely(result.err != MDBX_SUCCESS)) { - mdbx_rdt_unlock(env); - return result; - } - env->me_live_reader = env->me_pid; - } - - result.err = MDBX_SUCCESS; - unsigned slot, nreaders; - while (1) { - nreaders = atomic_load32(&env->me_lck->mti_numreaders, mo_Relaxed); - for (slot = 0; slot < nreaders; slot++) - if (atomic_load32(&env->me_lck->mti_readers[slot].mr_pid, mo_Relaxed) == - 0) - break; - - if (likely(slot < env->me_maxreaders)) - break; - - result.err = mdbx_cleanup_dead_readers(env, true, NULL); - if (result.err != MDBX_RESULT_TRUE) { - mdbx_rdt_unlock(env); - result.err = - (result.err == MDBX_SUCCESS) ? MDBX_READERS_FULL : result.err; - return result; - } - } - - result.rslot = &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. */ - atomic_store32(&result.rslot->mr_pid, 0, mo_Relaxed); - safe64_reset(&result.rslot->mr_txnid, true); - if (slot == nreaders) - atomic_store32(&env->me_lck->mti_numreaders, ++nreaders, mo_Relaxed); - atomic_store64(&result.rslot->mr_tid, (env->me_flags & MDBX_NOTLS) ? 0 : tid, - mo_Relaxed); - atomic_store32(&result.rslot->mr_pid, env->me_pid, mo_Relaxed); - 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, result.rslot); - } - return result; -} - -__cold int mdbx_thread_register(const MDBX_env *env) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!env->me_lck)) - return (env->me_flags & MDBX_EXCLUSIVE) ? MDBX_EINVAL : MDBX_EPERM; - - if (unlikely((env->me_flags & MDBX_ENV_TXKEY) == 0)) { - mdbx_assert(env, !env->me_lck || (env->me_flags & MDBX_NOTLS)); - return MDBX_EINVAL /* MDBX_NOTLS mode */; - } - - mdbx_assert(env, (env->me_flags & (MDBX_NOTLS | MDBX_ENV_TXKEY | - MDBX_EXCLUSIVE)) == MDBX_ENV_TXKEY); - MDBX_reader *r = thread_rthc_get(env->me_txkey); - if (unlikely(r != NULL)) { - mdbx_assert(env, r->mr_pid.weak == env->me_pid); - mdbx_assert(env, r->mr_tid.weak == mdbx_thread_self()); - if (unlikely(r->mr_pid.weak != env->me_pid)) - return MDBX_BAD_RSLOT; - return MDBX_RESULT_TRUE /* already registered */; - } - - const uintptr_t tid = mdbx_thread_self(); - if (env->me_txn0 && unlikely(env->me_txn0->mt_owner == tid)) - return MDBX_TXN_OVERLAPPING; - return bind_rslot((MDBX_env *)env, tid).err; -} - -__cold int mdbx_thread_unregister(const MDBX_env *env) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!env->me_lck)) - return MDBX_RESULT_TRUE; - - if (unlikely((env->me_flags & MDBX_ENV_TXKEY) == 0)) { - mdbx_assert(env, !env->me_lck || (env->me_flags & MDBX_NOTLS)); - return MDBX_RESULT_TRUE /* MDBX_NOTLS mode */; - } - - mdbx_assert(env, (env->me_flags & (MDBX_NOTLS | MDBX_ENV_TXKEY | - MDBX_EXCLUSIVE)) == MDBX_ENV_TXKEY); - MDBX_reader *r = thread_rthc_get(env->me_txkey); - if (unlikely(r == NULL)) - return MDBX_RESULT_TRUE /* not registered */; - - mdbx_assert(env, r->mr_pid.weak == env->me_pid); - mdbx_assert(env, r->mr_tid.weak == mdbx_thread_self()); - if (unlikely(r->mr_pid.weak != env->me_pid || - r->mr_tid.weak != mdbx_thread_self())) - return MDBX_BAD_RSLOT; - - if (unlikely(r->mr_txnid.weak < SAFE64_INVALID_THRESHOLD)) - return MDBX_BUSY /* transaction is still active */; - - atomic_store32(&r->mr_pid, 0, mo_AcquireRelease); - atomic_store32(&env->me_lck->mti_readers_refresh_flag, true, mo_Relaxed); - thread_rthc_set(env->me_txkey, nullptr); - return MDBX_SUCCESS; -} - -/* Common code for mdbx_txn_begin() and mdbx_txn_renew(). */ -static int mdbx_txn_renew0(MDBX_txn *txn, const unsigned flags) { - MDBX_env *env = txn->mt_env; - int rc; - -#if MDBX_ENV_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_ENV_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); - - const uintptr_t tid = mdbx_thread_self(); - if (flags & MDBX_TXN_RDONLY) { - mdbx_assert(env, (flags & ~(MDBX_TXN_RO_BEGIN_FLAGS | MDBX_WRITEMAP)) == 0); - txn->mt_flags = - MDBX_TXN_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)) { - if (unlikely(!r->mr_pid.weak) && - (mdbx_runtime_flags & MDBX_DBG_LEGACY_MULTIOPEN)) { - thread_rthc_set(env->me_txkey, nullptr); - r = nullptr; - } else { - mdbx_assert(env, r->mr_pid.weak == env->me_pid); - mdbx_assert(env, r->mr_tid.weak == mdbx_thread_self()); - } - } - } else { - mdbx_assert(env, !env->me_lck || (env->me_flags & MDBX_NOTLS)); - } - - if (likely(r)) { - if (unlikely(r->mr_pid.weak != env->me_pid || - r->mr_txnid.weak < SAFE64_INVALID_THRESHOLD)) - return MDBX_BAD_RSLOT; - } else if (env->me_lck) { - bind_rslot_result brs = bind_rslot(env, tid); - if (unlikely(brs.err != MDBX_SUCCESS)) - return brs.err; - r = brs.rslot; - } - txn->to.reader = r; - if (flags & (MDBX_TXN_RDONLY_PREPARE - MDBX_TXN_RDONLY)) { - mdbx_assert(env, txn->mt_txnid == 0); - mdbx_assert(env, txn->mt_owner == 0); - mdbx_assert(env, txn->mt_numdbs == 0); - if (likely(r)) { - mdbx_assert(env, r->mr_snapshot_pages_used.weak == 0); - mdbx_assert(env, r->mr_txnid.weak >= SAFE64_INVALID_THRESHOLD); - atomic_store32(&r->mr_snapshot_pages_used, 0, mo_Relaxed); - } - txn->mt_flags = MDBX_TXN_RDONLY | MDBX_TXN_FINISHED; - return MDBX_SUCCESS; - } - - /* Seek & fetch the last meta */ - if (likely(/* not recovery mode */ env->me_stuck_meta < 0)) { - 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); - atomic_store32(&r->mr_snapshot_pages_used, meta->mm_geo.next, - mo_Relaxed); - atomic_store64(&r->mr_snapshot_pages_retired, - unaligned_peek_u64(4, meta->mm_pages_retired), - mo_Relaxed); - safe64_write(&r->mr_txnid, snap); - mdbx_jitter4testing(false); - mdbx_assert(env, r->mr_pid.weak == mdbx_getpid()); - mdbx_assert( - env, r->mr_tid.weak == - ((env->me_flags & MDBX_NOTLS) ? 0 : mdbx_thread_self())); - mdbx_assert(env, r->mr_txnid.weak == snap); - atomic_store32(&env->me_lck->mti_readers_refresh_flag, true, - mo_AcquireRelease); - } - 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. */ - if (likely(meta == mdbx_meta_head(env) && - snap == mdbx_meta_txnid_fluid(env, meta) && - snap >= atomic_load64(env->me_oldest, mo_AcquireRelease))) { - mdbx_jitter4testing(false); - break; - } - } - } else { - /* recovery mode */ - MDBX_meta *const meta = METAPAGE(env, env->me_stuck_meta); - txn->mt_txnid = mdbx_meta_txnid_stable(env, meta); - txn->mt_geo = meta->mm_geo; - memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDBX_db)); - txn->mt_canary = meta->mm_canary; - if (likely(r)) { - atomic_store32(&r->mr_snapshot_pages_used, meta->mm_geo.next, - mo_Relaxed); - atomic_store64(&r->mr_snapshot_pages_retired, - unaligned_peek_u64(4, meta->mm_pages_retired), - mo_Relaxed); - atomic_store64(&r->mr_txnid, txn->mt_txnid, mo_AcquireRelease); - mdbx_jitter4testing(false); - mdbx_assert(env, r->mr_pid.weak == mdbx_getpid()); - mdbx_assert( - env, r->mr_tid.weak == - ((env->me_flags & MDBX_NOTLS) ? 0 : mdbx_thread_self())); - mdbx_assert(env, r->mr_txnid.weak == txn->mt_txnid); - atomic_store32(&env->me_lck->mti_readers_refresh_flag, true, - mo_AcquireRelease); - } - } - - if (unlikely(txn->mt_txnid < MIN_TXNID || txn->mt_txnid > MAX_TXNID)) { - mdbx_error("%s", "environment corrupted by died writer, must shutdown!"); - rc = MDBX_CORRUPTED; - goto bailout; - } - mdbx_assert(env, txn->mt_txnid >= env->me_oldest->weak); - txn->mt_dbxs = env->me_dbxs; /* mostly static anyway */ - mdbx_ensure(env, - txn->mt_txnid >= - /* paranoia is appropriate here */ env->me_oldest->weak); - txn->mt_numdbs = env->me_numdbs; - } else { - mdbx_assert(env, (flags & ~(MDBX_TXN_RW_BEGIN_FLAGS | MDBX_TXN_SPILLS | - MDBX_WRITEMAP)) == 0); - if (unlikely(txn->mt_owner == tid || - /* not recovery mode */ env->me_stuck_meta >= 0)) - 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 = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; ++i) { - if (atomic_load32(&lck->mti_readers[i].mr_pid, mo_Relaxed) == - env->me_pid && - unlikely(atomic_load64(&lck->mti_readers[i].mr_tid, mo_Relaxed) == - tid)) { - const txnid_t txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - if (txnid >= MIN_TXNID && txnid <= MAX_TXNID) - 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_TXN_TRY)); - 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 > MAX_TXNID)) { - rc = MDBX_TXN_FULL; - mdbx_error("txnid overflow, raise %d", rc); - goto bailout; - } - - txn->mt_flags = flags; - txn->mt_child = NULL; - txn->tw.loose_pages = NULL; - txn->tw.loose_count = 0; -#if MDBX_ENABLE_REFUND - txn->tw.loose_refund_wl = 0; -#endif /* MDBX_ENABLE_REFUND */ - txn->tw.dirtyroom = txn->mt_env->me_options.dp_limit; - mdbx_dpl_clear(txn->tw.dirtylist); - MDBX_PNL_SIZE(txn->tw.retired_pages) = 0; - txn->tw.spill_pages = NULL; - txn->tw.spill_least_removed = 0; - 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; - } - - /* Setup db info */ - mdbx_compiler_barrier(); - for (unsigned i = CORE_DBS; i < txn->mt_numdbs; i++) { - const unsigned db_flags = env->me_dbflags[i]; - txn->mt_dbs[i].md_flags = db_flags & DB_PERSISTENT_FLAGS; - txn->mt_dbistate[i] = - (db_flags & DB_VALID) ? DBI_VALID | DBI_USRVALID | DBI_STALE : 0; - } - txn->mt_dbistate[MAIN_DBI] = DBI_VALID | DBI_USRVALID; - txn->mt_dbistate[FREE_DBI] = DBI_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_flags & MDBX_TXN_RDONLY) ? txn->mt_next_pgno - : 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, - (txn->mt_flags & MDBX_TXN_RDONLY) ? true : false); - if (rc != MDBX_SUCCESS) - goto bailout; - } - if (txn->mt_flags & MDBX_TXN_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_TXN_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) { - if (unlikely(!txn)) - return MDBX_EINVAL; - - if (unlikely(txn->mt_signature != MDBX_MT_SIGNATURE)) - return MDBX_EBADSIGN; - - if (unlikely((txn->mt_flags & MDBX_TXN_RDONLY) == 0)) - return MDBX_EINVAL; - - int rc; - if (unlikely(txn->mt_owner != 0 || !(txn->mt_flags & MDBX_TXN_FINISHED))) { - rc = mdbx_txn_reset(txn); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - rc = mdbx_txn_renew0(txn, MDBX_TXN_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_TXN_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, MDBX_txn_flags_t flags, - MDBX_txn **ret) { - return __inline_mdbx_txn_begin(env, parent, flags, ret); -} - -int mdbx_txn_set_userctx(MDBX_txn *txn, void *ctx) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - txn->mt_userctx = ctx; - return MDBX_SUCCESS; -} - -void *mdbx_txn_get_userctx(const MDBX_txn *txn) { - return check_txn(txn, MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD) - ? nullptr - : txn->mt_userctx; -} - -int mdbx_txn_begin_ex(MDBX_env *env, MDBX_txn *parent, MDBX_txn_flags_t flags, - MDBX_txn **ret, void *context) { - MDBX_txn *txn; - unsigned size, tsize; - - if (unlikely(!ret)) - return MDBX_EINVAL; - *ret = NULL; - - if (unlikely((flags & ~MDBX_TXN_RW_BEGIN_FLAGS) && - (flags & ~MDBX_TXN_RO_BEGIN_FLAGS))) - return MDBX_EINVAL; - - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(env->me_flags & MDBX_RDONLY & - ~flags)) /* write txn in RDONLY env */ - return MDBX_EACCESS; - - if (unlikely(!env->me_map)) - return MDBX_EPERM; - - flags |= env->me_flags & MDBX_WRITEMAP; - - if (parent) { - /* Nested transactions: Max 1 child, write txns only, no writemap */ - rc = check_txn_rw(parent, - MDBX_TXN_RDONLY | MDBX_WRITEMAP | MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (env->me_options.spill_parent4child_denominator) { - /* Spill dirty-pages of parent to provide dirtyroom for child txn */ - rc = mdbx_txn_spill(parent, nullptr, - parent->tw.dirtylist->length / - env->me_options.spill_parent4child_denominator); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - mdbx_tassert(parent, mdbx_audit_ex(parent, 0, false) == 0); - - flags |= parent->mt_flags & (MDBX_TXN_RW_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_TXN_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_dbistate = (uint8_t *)txn + size - env->me_maxdbs; - txn->mt_flags = flags; - txn->mt_env = env; - - if (parent) { - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - txn->tw.cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = parent->mt_dbiseqs; - rc = mdbx_dpl_alloc(txn); - if (likely(rc == MDBX_SUCCESS)) { - const unsigned len = - MDBX_PNL_SIZE(parent->tw.reclaimed_pglist) + parent->tw.loose_count; - txn->tw.reclaimed_pglist = - mdbx_pnl_alloc((len > MDBX_PNL_INITIAL) ? len : MDBX_PNL_INITIAL); - if (unlikely(!txn->tw.reclaimed_pglist)) - rc = MDBX_ENOMEM; - } - if (unlikely(rc != MDBX_SUCCESS)) { - nested_failed: - mdbx_pnl_free(txn->tw.reclaimed_pglist); - mdbx_dpl_free(txn); - mdbx_free(txn); - return rc; - } - txn->tw.dirtyroom = parent->tw.dirtyroom; - - /* Move loose pages to reclaimed list */ - if (parent->tw.loose_count) { - do { - MDBX_page *lp = parent->tw.loose_pages; - const unsigned di = mdbx_dpl_exist(parent->tw.dirtylist, lp->mp_pgno); - mdbx_tassert(parent, di && parent->tw.dirtylist->items[di].ptr == lp); - mdbx_tassert(parent, lp->mp_flags == (P_LOOSE | P_DIRTY)); - rc = - mdbx_pnl_insert_range(&parent->tw.reclaimed_pglist, lp->mp_pgno, 1); - if (unlikely(rc != MDBX_SUCCESS)) - goto nested_failed; - parent->tw.loose_pages = lp->mp_next; - /* Remove from dirty list */ - mdbx_page_wash(parent, di, lp, 1); - } while (parent->tw.loose_pages); - parent->tw.loose_count = 0; -#if MDBX_ENABLE_REFUND - parent->tw.loose_refund_wl = 0; -#endif /* MDBX_ENABLE_REFUND */ - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - } - - mdbx_dpl_sort(parent->tw.dirtylist); - if (parent->tw.spill_pages) - mdbx_spill_purge(parent); - - mdbx_tassert(txn, MDBX_PNL_ALLOCLEN(txn->tw.reclaimed_pglist) >= - MDBX_PNL_SIZE(parent->tw.reclaimed_pglist)); - 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 assignment here, - only for assertion */ - = parent->mt_next_pgno) - - MDBX_ENABLE_REFUND)); - - 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->mt_geo = parent->mt_geo; -#if MDBX_ENABLE_REFUND - txn->tw.loose_refund_wl = 0; -#endif /* MDBX_ENABLE_REFUND */ - 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_dbistate, but clear DB_NEW */ - for (unsigned i = 0; i < txn->mt_numdbs; i++) - txn->mt_dbistate[i] = - parent->mt_dbistate[i] & ~(DBI_FRESH | DBI_CREAT | DBI_DIRTY); - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - env->me_options.dp_limit); - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - 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_TXN_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 { - if (flags & (MDBX_TXN_RDONLY_PREPARE - MDBX_TXN_RDONLY)) - mdbx_assert(env, txn->mt_flags == (MDBX_TXN_RDONLY | MDBX_TXN_FINISHED)); - else if (flags & MDBX_TXN_RDONLY) - mdbx_assert(env, (txn->mt_flags & - ~(MDBX_NOTLS | MDBX_TXN_RDONLY | MDBX_WRITEMAP | - /* Win32: SRWL flag */ MDBX_SHRINK_ALLOWED)) == 0); - else { - mdbx_assert(env, (txn->mt_flags & ~(MDBX_WRITEMAP | MDBX_SHRINK_ALLOWED | - MDBX_NOMETASYNC | MDBX_SAFE_NOSYNC | - MDBX_TXN_SPILLS)) == 0); - assert(!txn->tw.spill_pages && !txn->tw.spill_least_removed); - } - txn->mt_signature = MDBX_MT_SIGNATURE; - txn->mt_userctx = context; - *ret = txn; - mdbx_debug("begin txn %" PRIaTXN "%c %p on env %p, root page %" PRIaPGNO - "/%" PRIaPGNO, - txn->mt_txnid, (flags & MDBX_TXN_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, bool 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_ENV_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_ENV_CHECKPID */ - - info->txn_id = txn->mt_txnid; - info->txn_space_used = pgno2bytes(env, txn->mt_geo.next); - - if (txn->mt_flags & MDBX_TXN_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 = unaligned_peek_u64(4, 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; - uint64_t reader_snapshot_pages_retired; - if (txn->to.reader && - head_retired > - (reader_snapshot_pages_retired = atomic_load64( - &txn->to.reader->mr_snapshot_pages_retired, mo_Relaxed))) { - info->txn_space_dirty = info->txn_space_retired = pgno2bytes( - env, (pgno_t)(head_retired - reader_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 = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease)) { - mdbx_jitter4testing(true); - const txnid_t snap_txnid = - safe64_read(&lck->mti_readers[i].mr_txnid); - const uint64_t snap_retired = - atomic_load64(&lck->mti_readers[i].mr_snapshot_pages_retired, - mo_AcquireRelease); - if (unlikely(snap_retired != - atomic_load64( - &lck->mti_readers[i].mr_snapshot_pages_retired, - mo_Relaxed)) || - 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 - - atomic_load64( - &txn->to.reader->mr_snapshot_pages_retired, - mo_Relaxed))); - } - } - } - } - 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, txn->mt_env->me_options.dp_limit - 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 = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - 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 (atomic_load32(&lck->mti_readers[i].mr_pid, mo_Relaxed) && - 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.weak != 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; -} - -/* Check for misused dbi handles */ -#define TXN_DBI_CHANGED(txn, dbi) \ - ((txn)->mt_dbiseqs[dbi] != (txn)->mt_env->me_dbiseqs[dbi]) - -static void dbi_import_locked(MDBX_txn *txn) { - MDBX_env *const env = txn->mt_env; - const unsigned n = env->me_numdbs; - for (unsigned i = CORE_DBS; i < n; ++i) { - if (i >= txn->mt_numdbs) { - txn->mt_dbistate[i] = 0; - if (!(txn->mt_flags & MDBX_TXN_RDONLY)) - txn->tw.cursors[i] = NULL; - } - if ((env->me_dbflags[i] & DB_VALID) && - !(txn->mt_dbistate[i] & DBI_USRVALID)) { - txn->mt_dbiseqs[i] = env->me_dbiseqs[i]; - txn->mt_dbs[i].md_flags = env->me_dbflags[i] & DB_PERSISTENT_FLAGS; - txn->mt_dbistate[i] = DBI_VALID | DBI_USRVALID | DBI_STALE; - mdbx_tassert(txn, txn->mt_dbxs[i].md_cmp != NULL); - } - } - txn->mt_numdbs = n; -} - -/* Import DBI which opened after txn started into context */ -static __cold bool dbi_import(MDBX_txn *txn, MDBX_dbi dbi) { - if (dbi < CORE_DBS || dbi >= txn->mt_env->me_numdbs) - return false; - - mdbx_ensure(txn->mt_env, mdbx_fastmutex_acquire(&txn->mt_env->me_dbi_lock) == - MDBX_SUCCESS); - dbi_import_locked(txn); - mdbx_ensure(txn->mt_env, mdbx_fastmutex_release(&txn->mt_env->me_dbi_lock) == - MDBX_SUCCESS); - return txn->mt_dbistate[dbi] & DBI_USRVALID; -} - -/* Export or close DBI handles opened in this txn. */ -static void dbi_update(MDBX_txn *txn, int keep) { - mdbx_tassert(txn, !txn->mt_parent && txn == txn->mt_env->me_txn0); - MDBX_dbi n = txn->mt_numdbs; - if (n) { - bool locked = false; - MDBX_env *const env = txn->mt_env; - - for (unsigned i = n; --i >= CORE_DBS;) { - if (likely((txn->mt_dbistate[i] & DBI_CREAT) == 0)) - continue; - if (!locked) { - mdbx_ensure(env, - mdbx_fastmutex_acquire(&env->me_dbi_lock) == MDBX_SUCCESS); - locked = true; - } - if (env->me_numdbs <= i || txn->mt_dbiseqs[i] != env->me_dbiseqs[i]) - continue /* dbi explicitly closed and/or then re-opened by other txn */; - if (keep) { - env->me_dbflags[i] = txn->mt_dbs[i].md_flags | DB_VALID; - } else { - char *ptr = env->me_dbxs[i].md_name.iov_base; - if (ptr) { - env->me_dbxs[i].md_name.iov_len = 0; - mdbx_memory_fence(false, true); - mdbx_assert(env, env->me_dbflags[i] == 0); - env->me_dbiseqs[i]++; - env->me_dbxs[i].md_name.iov_base = NULL; - mdbx_free(ptr); - } - } - } - - n = env->me_numdbs; - if (n > CORE_DBS && unlikely(!(env->me_dbflags[n - 1] & DB_VALID))) { - if (!locked) { - mdbx_ensure(env, - mdbx_fastmutex_acquire(&env->me_dbi_lock) == MDBX_SUCCESS); - locked = true; - } - - n = env->me_numdbs; - while (n > CORE_DBS && !(env->me_dbflags[n - 1] & DB_VALID)) - --n; - env->me_numdbs = n; - } - - if (unlikely(locked)) - mdbx_ensure(env, - mdbx_fastmutex_release(&env->me_dbi_lock) == MDBX_SUCCESS); - } -} - -/* Filter-out pgno list from transaction's dirty-page list */ -static void mdbx_dpl_sift(MDBX_txn *const txn, MDBX_PNL pl, - const bool spilled) { - if (MDBX_PNL_SIZE(pl) && txn->tw.dirtylist->length) { - mdbx_tassert(txn, mdbx_pnl_check4assert(pl, txn->mt_next_pgno << spilled)); - MDBX_dpl *dl = mdbx_dpl_sort(txn->tw.dirtylist); - - /* Scanning in ascend order */ - const int step = MDBX_PNL_ASCENDING ? 1 : -1; - const int begin = MDBX_PNL_ASCENDING ? 1 : MDBX_PNL_SIZE(pl); - const int end = MDBX_PNL_ASCENDING ? MDBX_PNL_SIZE(pl) + 1 : 0; - mdbx_tassert(txn, pl[begin] <= pl[end - step]); - - unsigned r = mdbx_dpl_search(dl, pl[begin] >> spilled); - mdbx_tassert(txn, dl->sorted == dl->length); - for (int i = begin; r <= dl->length;) { /* scan loop */ - assert(i != end); - mdbx_tassert(txn, !spilled || (pl[i] & 1) == 0); - pgno_t pl_pgno = pl[i] >> spilled; - pgno_t dp_pgno = dl->items[r].pgno; - if (likely(dp_pgno != pl_pgno)) { - const bool cmp = dp_pgno < pl_pgno; - r += cmp; - i += cmp ? 0 : step; - if (likely(i != end)) - continue; - return; - } - - /* update loop */ - unsigned w = r; - remove_dl: - if ((txn->mt_env->me_flags & MDBX_WRITEMAP) == 0) { - MDBX_page *dp = dl->items[r].ptr; - mdbx_dpage_free(txn->mt_env, dp, IS_OVERFLOW(dp) ? dp->mp_pages : 1); - } - ++r; - next_i: - i += step; - if (unlikely(i == end)) { - while (r <= dl->length) - dl->items[w++] = dl->items[r++]; - } else { - while (r <= dl->length) { - assert(i != end); - mdbx_tassert(txn, !spilled || (pl[i] & 1) == 0); - pl_pgno = pl[i] >> spilled; - dp_pgno = dl->items[r].pgno; - if (dp_pgno < pl_pgno) - dl->items[w++] = dl->items[r++]; - else if (dp_pgno > pl_pgno) - goto next_i; - else - goto remove_dl; - } - } - dl->sorted = dl->length = w - 1; - txn->tw.dirtyroom += r - w; - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - return; - } - } -} - -/* 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, const unsigned mode) { - MDBX_env *env = txn->mt_env; - static const char *const names[] = MDBX_END_NAMES; - -#if MDBX_ENV_CHECKPID - if (unlikely(txn->mt_env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - return MDBX_PANIC; - } -#endif /* MDBX_ENV_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_TXN_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->weak); - - int rc = MDBX_SUCCESS; - if (F_ISSET(txn->mt_flags, MDBX_TXN_RDONLY)) { - if (txn->to.reader) { - MDBX_reader *slot = txn->to.reader; - mdbx_assert(env, slot->mr_pid.weak == env->me_pid); - if (likely(!F_ISSET(txn->mt_flags, MDBX_TXN_FINISHED))) { - mdbx_assert(env, txn->mt_txnid == slot->mr_txnid.weak && - slot->mr_txnid.weak >= - env->me_lck->mti_oldest_reader.weak); -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - mdbx_txn_valgrind(env, nullptr); -#endif - atomic_store32(&slot->mr_snapshot_pages_used, 0, mo_Relaxed); - safe64_reset(&slot->mr_txnid, false); - atomic_store32(&env->me_lck->mti_readers_refresh_flag, true, - mo_AcquireRelease); - } else { - mdbx_assert(env, slot->mr_pid.weak == env->me_pid); - mdbx_assert(env, slot->mr_txnid.weak >= SAFE64_INVALID_THRESHOLD); - } - if (mode & MDBX_END_SLOT) { - if ((env->me_flags & MDBX_ENV_TXKEY) == 0) - atomic_store32(&slot->mr_pid, 0, mo_AcquireRelease); - 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_TXN_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 - if (!(mode & MDBX_END_EOTDONE)) /* !(already closed cursors) */ - mdbx_cursors_eot(txn, false); - - txn->mt_flags = MDBX_TXN_FINISHED; - txn->mt_owner = 0; - env->me_txn = txn->mt_parent; - mdbx_pnl_free(txn->tw.spill_pages); - txn->tw.spill_pages = nullptr; - if (txn == env->me_txn0) { - mdbx_assert(env, txn->mt_parent == NULL); - /* Export or close DBI handles created in this txn */ - dbi_update(txn, mode & MDBX_END_UPDATE); - mdbx_pnl_shrink(&txn->tw.retired_pages); - mdbx_pnl_shrink(&txn->tw.reclaimed_pglist); - if (!(env->me_flags & MDBX_WRITEMAP)) - mdbx_dlist_free(txn); - /* The writer mutex was locked in mdbx_txn_begin. */ - mdbx_txn_unlock(env); - } else { - mdbx_assert(env, txn->mt_parent != NULL); - MDBX_txn *const parent = txn->mt_parent; - mdbx_assert(env, parent->mt_signature == MDBX_MT_SIGNATURE); - mdbx_assert(env, parent->mt_child == txn && - (parent->mt_flags & MDBX_TXN_HAS_CHILD) != 0); - mdbx_assert( - env, mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - - 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; - } - - parent->mt_child = nullptr; - parent->mt_flags &= ~MDBX_TXN_HAS_CHILD; - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - mdbx_tassert(parent, mdbx_audit_ex(parent, 0, false) == 0); - if (!(env->me_flags & MDBX_WRITEMAP)) - mdbx_dlist_free(txn); - mdbx_dpl_free(txn); - mdbx_pnl_free(txn->tw.reclaimed_pglist); - - 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_implicit(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_warning("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_TXN_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_break(MDBX_txn *txn) { - do { - int rc = check_txn(txn, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - txn->mt_flags |= MDBX_TXN_ERROR; - if (txn->mt_flags & MDBX_TXN_RDONLY) - break; - txn = txn->mt_child; - } while (txn); - return MDBX_SUCCESS; -} - -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_TXN_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); - - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - 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_TXN_RDONLY) == 0) { - pending = txn->tw.loose_count + MDBX_PNL_SIZE(txn->tw.reclaimed_pglist) + - (MDBX_PNL_SIZE(txn->tw.retired_pages) - retired_stored); - } - - 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_dbistate[i] &= ~DBI_AUDITED; - - pgno_t count = 0; - for (MDBX_dbi i = FREE_DBI; i <= MAIN_DBI; i++) { - if (!(txn->mt_dbistate[i] & DBI_VALID)) - continue; - rc = mdbx_cursor_init(&cx.outer, txn, i); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - txn->mt_dbistate[i] |= DBI_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_TXN_RDONLY) == 0) { - for (MDBX_dbi k = txn->mt_numdbs; --k > MAIN_DBI;) { - if ((txn->mt_dbistate[k] & DBI_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_dbistate[k] |= DBI_AUDITED; - if (!(txn->mt_dbistate[k] & MDBX_DBI_STALE)) - 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, SIBLING_RIGHT); - } - mdbx_tassert(txn, rc == MDBX_NOTFOUND); - } - - for (MDBX_dbi i = FREE_DBI; i < txn->mt_numdbs; i++) { - if ((txn->mt_dbistate[i] & (DBI_VALID | DBI_AUDITED | DBI_STALE)) != - DBI_VALID) - continue; - for (MDBX_txn *t = txn; t; t = t->mt_parent) - if (F_ISSET(t->mt_dbistate[i], DBI_DIRTY | DBI_CREAT)) { - count += t->mt_dbs[i].md_branch_pages + t->mt_dbs[i].md_leaf_pages + - t->mt_dbs[i].md_overflow_pages; - txn->mt_dbistate[i] |= DBI_AUDITED; - break; - } - if (!(txn->mt_dbistate[i] & DBI_AUDITED)) { - 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_dbistate[i]); - } - } - - if (pending + freecount + count + NUM_METAS == txn->mt_next_pgno) - return MDBX_SUCCESS; - - if ((txn->mt_flags & MDBX_TXN_RDONLY) == 0) - mdbx_error("audit @%" PRIaTXN ": %u(pending) = %u(loose-count) + " - "%u(reclaimed-list) + %u(retired-pending) - %u(retired-stored)", - 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); - 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_couple couple; - int rc = mdbx_cursor_init(&couple.outer, txn, FREE_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout_notracking; - - couple.outer.mc_flags |= C_RECLAIMING; - couple.outer.mc_next = txn->tw.cursors[FREE_DBI]; - txn->tw.cursors[FREE_DBI] = &couple.outer; - -retry: - ++loop; -retry_noaccount: - mdbx_trace("%s", " >> restart"); - mdbx_tassert(txn, - mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == - txn->mt_env->me_options.dp_limit); - if (unlikely(/* paranoia */ loop > ((MDBX_DEBUG > 0) ? 9 : 99))) { - mdbx_error("too more loops %u, bailout", loop); - rc = MDBX_PROBLEM; - goto bailout; - } - - rc = mdbx_prep_backlog(txn, &couple.outer, - 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 - MDBX_ENABLE_REFUND)); - if (lifo) { - if (cleaned_gc_slot < (txn->tw.lifo_reclaimed - ? MDBX_PNL_SIZE(txn->tw.lifo_reclaimed) - : 0)) { - 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->weak); - key.iov_base = &cleaned_gc_id; - key.iov_len = sizeof(cleaned_gc_id); - rc = mdbx_cursor_get(&couple.outer, &key, NULL, MDBX_SET); - if (rc == MDBX_NOTFOUND) - continue; - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - rc = mdbx_prep_backlog(txn, &couple.outer, 0); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - mdbx_tassert(txn, cleaned_gc_id < env->me_oldest->weak); - mdbx_trace("%s.cleanup-reclaimed-id [%u]%" PRIaTXN, dbg_prefix_mode, - cleaned_gc_slot, cleaned_gc_id); - rc = mdbx_cursor_del(&couple.outer, 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 tw.reclaimed_pglist. */ - while (cleaned_gc_id <= txn->tw.last_reclaimed) { - gc_rid = cleaned_gc_id; - settled = 0; - rc = mdbx_cursor_first(&couple.outer, &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 < MIN_TXNID || cleaned_gc_id > MAX_TXNID)) { - 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, &couple.outer, 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->weak); - mdbx_trace("%s.cleanup-reclaimed-id %" PRIaTXN, dbg_prefix_mode, - cleaned_gc_id); - rc = mdbx_cursor_del(&couple.outer, 0); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - } - - mdbx_tassert(txn, - mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - mdbx_tassert(txn, mdbx_dirtylist_check(txn)); - mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == - txn->mt_env->me_options.dp_limit); - 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 - MDBX_ENABLE_REFUND)); - 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 tw.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 tw.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 */ - MDBX_dpl *const dl = txn->tw.dirtylist; - unsigned w = 0; - for (unsigned r = w; ++r <= dl->length;) { - MDBX_page *dp = dl->items[r].ptr; - mdbx_tassert(txn, (dp->mp_flags & P_DIRTY)); - mdbx_tassert(txn, - dl->items[r].pgno + (IS_OVERFLOW(dp) ? dp->mp_pages : 1) <= - txn->mt_next_pgno); - if ((dp->mp_flags & P_LOOSE) == 0) { - if (++w != r) - dl->items[w] = dl->items[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; - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - txn->tw.loose_pages = NULL; - txn->tw.loose_count = 0; -#if MDBX_ENABLE_REFUND - txn->tw.loose_refund_wl = 0; -#endif /* MDBX_ENABLE_REFUND */ - } - - 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 */ - couple.outer.mc_flags &= ~C_RECLAIMING; - rc = mdbx_page_search(&couple.outer, NULL, - MDBX_PS_LAST | MDBX_PS_MODIFY); - couple.outer.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, &couple.outer, data.iov_len); - rc = mdbx_cursor_put(&couple.outer, &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_noaccount /* rare case, but avoids GC fragmentation and one - cycle. */ - ; - } - continue; - } - - /* handle reclaimed and lost pages - merge and store both into gc */ - mdbx_tassert(txn, - mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - 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. */ - bool need_cleanup = false; - txnid_t snap_oldest; - retry_rid: - couple.outer.mc_flags &= ~C_RECLAIMING; - do { - snap_oldest = mdbx_find_oldest(txn); - rc = mdbx_page_alloc(&couple.outer, 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); - couple.outer.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); - cleaned_gc_slot = 0; - } - gc_rid = MDBX_PNL_LAST(txn->tw.lifo_reclaimed); - } else { - mdbx_tassert(txn, txn->tw.last_reclaimed == 0); - if (unlikely(mdbx_find_oldest(txn) != snap_oldest)) - /* should retry mdbx_page_alloc(MDBX_ALLOC_GC) - * if the oldest reader changes since the last attempt */ - goto retry_rid; - /* no reclaimable GC entries, - * therefore no entries with ID < mdbx_find_oldest(txn) */ - txn->tw.last_reclaimed = gc_rid = snap_oldest - 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 >= MIN_TXNID && gc_rid <= MAX_TXNID); - --gc_rid; - key.iov_base = &gc_rid; - key.iov_len = sizeof(gc_rid); - rc = mdbx_cursor_get(&couple.outer, &key, &data, MDBX_SET_KEY); - if (unlikely(rc == MDBX_SUCCESS)) { - mdbx_debug("%s: GC's id %" PRIaTXN - " is used, continue bottom-up search", - dbg_prefix_mode, gc_rid); - ++gc_rid; - rc = mdbx_cursor_get(&couple.outer, &key, &data, MDBX_FIRST); - if (rc == MDBX_NOTFOUND) { - mdbx_debug("%s: GC is empty", dbg_prefix_mode); - break; - } - if (unlikely(rc != MDBX_SUCCESS || - key.iov_len != sizeof(mdbx_tid_t))) { - rc = MDBX_CORRUPTED; - goto bailout; - } - txnid_t gc_first = unaligned_peek_u64(4, key.iov_base); - if (unlikely(gc_first < MIN_TXNID || gc_first > MAX_TXNID)) { - rc = MDBX_CORRUPTED; - goto bailout; - } - if (gc_first < 2) { - mdbx_debug("%s: no free GC's id(s) less than %" PRIaTXN, - dbg_prefix_mode, gc_rid); - break; - } - gc_rid = gc_first - 1; - } - - 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(&couple.outer, &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 < MIN_TXNID || gc_first > MAX_TXNID)) { - 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: gc_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->weak); - if (unlikely(reservation_gc_id < 1 || - reservation_gc_id >= - atomic_load64(env->me_oldest, mo_Relaxed))) { - 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, &couple.outer, data.iov_len); - rc = mdbx_cursor_put(&couple.outer, &key, &data, - MDBX_RESERVE | MDBX_NOOVERWRITE); - mdbx_tassert(txn, - mdbx_pnl_check4assert(txn->tw.reclaimed_pglist, - txn->mt_next_pgno - MDBX_ENABLE_REFUND)); - 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_noaccount; - } - - 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_ENABLE_REFUND)); - 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(&couple.outer, &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(&couple.outer, &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->weak); - key.iov_base = &fill_gc_id; - key.iov_len = sizeof(fill_gc_id); - - mdbx_tassert(txn, data.iov_len >= sizeof(pgno_t) * 2); - couple.outer.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) - couple.outer.mc_flags &= ~C_GCFREEZE; - } - chunk = left; - } - rc = mdbx_cursor_put(&couple.outer, &key, &data, - MDBX_CURRENT | MDBX_RESERVE); - couple.outer.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 growth (%u -> %u, loose +%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; - } - if (unlikely(retired_stored != MDBX_PNL_SIZE(txn->tw.retired_pages))) { - mdbx_tassert(txn, - retired_stored < MDBX_PNL_SIZE(txn->tw.retired_pages)); - mdbx_notice("** restart: retired-list growth (%u -> %u)", - retired_stored, MDBX_PNL_SIZE(txn->tw.retired_pages)); - 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(&couple.outer, &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->tw.cursors[FREE_DBI] = couple.outer.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; - mdbx_assert(env, iov_items > 0); - int rc; - if (likely(iov_items == 1)) { - mdbx_assert(env, iov->iov_len == iov_bytes); - rc = mdbx_pwrite(env->me_lazy_fd, iov->iov_base, iov_bytes, iov_off); - } else { - 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)); - else { - VALGRIND_MAKE_MEM_DEFINED(txn->mt_env->me_map + iov_off, iov_bytes); - ASAN_UNPOISON_MEMORY_REGION(txn->mt_env->me_map + iov_off, iov_bytes); - } - - 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]; - MDBX_dpl *const dl = mdbx_dpl_sort(txn->tw.dirtylist); - MDBX_env *const env = txn->mt_env; - pgno_t flush_begin = MAX_PAGENO; - pgno_t flush_end = MIN_PAGENO; - int rc = MDBX_SUCCESS; - 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->items[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->items[++w] = dl->items[r]; - continue; - } - if (dp->mp_flags & P_LOOSE) { - dl->items[++w] = dl->items[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->weak += npages; - dp->mp_flags -= P_DIRTY; - dp->mp_txnid = pp_txnid2chk(txn); - - 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) { - rc = mdbx_flush_iov(txn, iov, iov_items, iov_off, iov_bytes); -#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; - if (unlikely(rc != MDBX_SUCCESS)) { - do - dl->items[++w] = dl->items[r]; - while (++r <= dl->length); - break; - } - } - 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; - } - } - - mdbx_tassert(txn, dl->sorted == dl->length && r == dl->length + 1); - txn->tw.dirtyroom += dl->length - w; - assert(txn->tw.dirtyroom <= txn->mt_env->me_options.dp_limit); - dl->sorted = dl->length = w; - mdbx_tassert(txn, txn->mt_parent || - txn->tw.dirtyroom + txn->tw.dirtylist->length == - txn->mt_env->me_options.dp_limit); - - if (iov_items) - rc = mdbx_flush_iov(txn, iov, iov_items, iov_off, iov_bytes); - - if (unlikely(rc != MDBX_SUCCESS)) { - txn->mt_flags |= MDBX_TXN_ERROR; - 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; - return MDBX_SUCCESS; -} - -/* 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_dbistate[dbi] & validity))) - return true; - - return dbi_import(txn, dbi); -} - -int mdbx_txn_commit(MDBX_txn *txn) { return __inline_mdbx_txn_commit(txn); } - -/* Merge child txn into parent */ -static __inline void mdbx_txn_merge(MDBX_txn *const parent, MDBX_txn *const txn, - const unsigned parent_retired_len) { - MDBX_dpl *const src = mdbx_dpl_sort(txn->tw.dirtylist); - - /* Remove refunded pages from parent's dirty list */ - MDBX_dpl *const dst = mdbx_dpl_sort(parent->tw.dirtylist); - while (MDBX_ENABLE_REFUND && dst->length && - dst->items[dst->length].pgno >= parent->mt_next_pgno) { - if (!(txn->mt_env->me_flags & MDBX_WRITEMAP)) { - MDBX_page *dp = dst->items[dst->length].ptr; - mdbx_dpage_free(txn->mt_env, dp, IS_OVERFLOW(dp) ? dp->mp_pages : 1); - } - dst->length -= 1; - } - parent->tw.dirtyroom += dst->sorted - dst->length; - assert(parent->tw.dirtyroom <= parent->mt_env->me_options.dp_limit); - dst->sorted = dst->length; - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - parent->mt_env->me_options.dp_limit); - - /* Remove reclaimed pages from parent's dirty list */ - const MDBX_PNL reclaimed_list = parent->tw.reclaimed_pglist; - mdbx_dpl_sift(parent, reclaimed_list, false); - - /* Move retired pages from parent's dirty & spilled list to reclaimed */ - unsigned r, w, d, s, l; - for (r = w = parent_retired_len; - ++r <= MDBX_PNL_SIZE(parent->tw.retired_pages);) { - const pgno_t pgno = parent->tw.retired_pages[r]; - const unsigned di = mdbx_dpl_exist(parent->tw.dirtylist, pgno); - const unsigned si = (!di && unlikely(parent->tw.spill_pages)) - ? mdbx_pnl_exist(parent->tw.spill_pages, pgno << 1) - : 0; - unsigned npages; - const char *kind; - if (di) { - MDBX_page *dp = parent->tw.dirtylist->items[di].ptr; - mdbx_tassert(parent, (dp->mp_flags & ~(P_LEAF | P_LEAF2 | P_BRANCH | - P_OVERFLOW | P_DIRTY)) == 0); - npages = IS_OVERFLOW(dp) ? dp->mp_pages : 1; - mdbx_page_wash(parent, di, dp, npages); - kind = "dirty"; - l = 1; - if (unlikely(npages > l)) { - /* OVERFLOW-страница могла быть переиспользована по частям. Тогда - * в retired-списке может быть только начало последовательности, - * а остаток растащен по dirty, spilled и reclaimed спискам. Поэтому - * переносим в reclaimed с проверкой на обрыв последовательности. - * В любом случае, все осколки будут учтены и отфильтрованы, т.е. если - * страница была разбита на части, то важно удалить dirty-элемент, - * а все осколки будут учтены отдельно. */ - - /* Список retired страниц не сортирован, но для ускорения сортировки - * дополняется в соответствии с MDBX_PNL_ASCENDING */ -#if MDBX_PNL_ASCENDING - const unsigned len = MDBX_PNL_SIZE(parent->tw.retired_pages); - while (r < len && parent->tw.retired_pages[r + 1] == pgno + l) { - ++r; - if (++l == npages) - break; - } -#else - while (w > parent_retired_len && - parent->tw.retired_pages[w - 1] == pgno + l) { - --w; - if (++l == npages) - break; - } -#endif - } - } else if (unlikely(si)) { - l = npages = 1; - mdbx_spill_remove(parent, si, 1); - kind = "spilled"; - } else { - parent->tw.retired_pages[++w] = pgno; - continue; - } - - mdbx_debug("reclaim retired parent's %u->%u %s page %" PRIaPGNO, npages, l, - kind, pgno); - int err = mdbx_pnl_insert_range(&parent->tw.reclaimed_pglist, pgno, l); - mdbx_ensure(txn->mt_env, err == MDBX_SUCCESS); - } - MDBX_PNL_SIZE(parent->tw.retired_pages) = w; - - /* Filter-out parent spill list */ - if (parent->tw.spill_pages && MDBX_PNL_SIZE(parent->tw.spill_pages) > 0) { - const MDBX_PNL sl = mdbx_spill_purge(parent); - unsigned len = MDBX_PNL_SIZE(sl); - if (len) { - /* Remove refunded pages from parent's spill list */ - if (MDBX_ENABLE_REFUND && - MDBX_PNL_MOST(sl) >= (parent->mt_next_pgno << 1)) { -#if MDBX_PNL_ASCENDING - unsigned i = MDBX_PNL_SIZE(sl); - assert(MDBX_PNL_MOST(sl) == MDBX_PNL_LAST(sl)); - do { - if ((sl[i] & 1) == 0) - mdbx_debug("refund parent's spilled page %" PRIaPGNO, sl[i] >> 1); - i -= 1; - } while (i && sl[i] >= (parent->mt_next_pgno << 1)); - MDBX_PNL_SIZE(sl) = i; -#else - assert(MDBX_PNL_MOST(sl) == MDBX_PNL_FIRST(sl)); - unsigned i = 0; - do { - ++i; - if ((sl[i] & 1) == 0) - mdbx_debug("refund parent's spilled page %" PRIaPGNO, sl[i] >> 1); - } while (i < len && sl[i + 1] >= (parent->mt_next_pgno << 1)); - MDBX_PNL_SIZE(sl) = len -= i; - memmove(sl + 1, sl + 1 + i, len * sizeof(sl[0])); -#endif - } - mdbx_tassert(txn, mdbx_pnl_check4assert(sl, parent->mt_next_pgno << 1)); - - /* Remove reclaimed pages from parent's spill list */ - s = MDBX_PNL_SIZE(sl), r = MDBX_PNL_SIZE(reclaimed_list); - /* Scanning from end to begin */ - while (s && r) { - if (sl[s] & 1) { - --s; - continue; - } - const pgno_t spilled_pgno = sl[s] >> 1; - const pgno_t reclaimed_pgno = reclaimed_list[r]; - if (reclaimed_pgno != spilled_pgno) { - const bool cmp = MDBX_PNL_ORDERED(spilled_pgno, reclaimed_pgno); - s -= !cmp; - r -= cmp; - } else { - mdbx_debug("remove reclaimed parent's spilled page %" PRIaPGNO, - reclaimed_pgno); - mdbx_spill_remove(parent, s, 1); - --s; - --r; - } - } - - /* Remove anything in our dirty list from parent's spill list */ - /* Scanning spill list in descend order */ - const int step = MDBX_PNL_ASCENDING ? -1 : 1; - s = MDBX_PNL_ASCENDING ? MDBX_PNL_SIZE(sl) : 1; - d = src->length; - while (d && (MDBX_PNL_ASCENDING ? s > 0 : s <= MDBX_PNL_SIZE(sl))) { - if (sl[s] & 1) { - s += step; - continue; - } - const pgno_t spilled_pgno = sl[s] >> 1; - const pgno_t dirty_pgno_form = src->items[d].pgno; - MDBX_page *dp = src->items[d].ptr; - const unsigned npages = IS_OVERFLOW(dp) ? dp->mp_pages : 1; - const pgno_t dirty_pgno_to = dirty_pgno_form + npages; - if (dirty_pgno_form > spilled_pgno) { - --d; - continue; - } - if (dirty_pgno_to <= spilled_pgno) { - s += step; - continue; - } - - mdbx_debug("remove dirtied parent's spilled %u page %" PRIaPGNO, npages, - dirty_pgno_form); - mdbx_spill_remove(parent, s, 1); - s += step; - } - - /* Squash deleted pagenums if we deleted any */ - mdbx_spill_purge(parent); - } - } - - /* Remove anything in our spill list from parent's dirty list */ - if (txn->tw.spill_pages) { - mdbx_tassert(txn, mdbx_pnl_check4assert(txn->tw.spill_pages, - parent->mt_next_pgno << 1)); - mdbx_dpl_sift(parent, txn->tw.spill_pages, true); - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - parent->mt_env->me_options.dp_limit); - } - - /* Find length of merging our dirty list with parent's and release - * filter-out pages */ - for (l = 0, d = dst->length, s = src->length; d > 0 && s > 0;) { - const MDBX_page *sp = src->items[s].ptr; - mdbx_tassert(parent, - (sp->mp_flags & ~(P_LEAF | P_LEAF2 | P_BRANCH | P_OVERFLOW | - P_DIRTY | P_LOOSE)) == 0); - const unsigned s_npages = IS_OVERFLOW(sp) ? sp->mp_pages : 1; - const pgno_t s_pgno = src->items[s].pgno; - - MDBX_page *dp = dst->items[d].ptr; - mdbx_tassert(parent, (dp->mp_flags & ~(P_LEAF | P_LEAF2 | P_BRANCH | - P_OVERFLOW | P_DIRTY)) == 0); - const unsigned d_npages = IS_OVERFLOW(dp) ? dp->mp_pages : 1; - const pgno_t d_pgno = dst->items[d].pgno; - - if (d_pgno >= s_pgno + s_npages) { - --d; - ++l; - } else if (d_pgno + d_npages <= s_pgno) { - --s; - ++l; - } else { - dst->items[d--].ptr = nullptr; - if ((txn->mt_flags & MDBX_WRITEMAP) == 0) - mdbx_dpage_free(txn->mt_env, dp, d_npages); - } - } - assert(dst->sorted == dst->length); - mdbx_tassert(parent, dst->allocated >= l + d + s); - dst->sorted = l + d + s; /* the merged length */ - - /* Merge our dirty list into parent's, i.e. merge(dst, src) -> dst */ - if (dst->sorted >= dst->length) { - /* from end to begin with dst extending */ - for (l = dst->sorted, s = src->length, d = dst->length; s > 0 && d > 0;) { - if (unlikely(l <= d)) { - /* squash to get a gap of free space for merge */ - for (r = w = 1; r <= d; ++r) - if (dst->items[r].ptr) { - if (w != r) { - dst->items[w] = dst->items[r]; - dst->items[r].ptr = nullptr; - } - ++w; - } - mdbx_notice("squash to begin for extending-merge %u -> %u", d, w - 1); - d = w - 1; - continue; - } - assert(l > d); - if (dst->items[d].ptr) { - dst->items[l--] = (dst->items[d].pgno > src->items[s].pgno) - ? dst->items[d--] - : src->items[s--]; - } else - --d; - } - if (s > 0) { - assert(l == s); - while (d > 0) { - assert(dst->items[d].ptr == nullptr); - --d; - } - do { - assert(l > 0); - dst->items[l--] = src->items[s--]; - } while (s > 0); - } else { - assert(l == d); - while (l > 0) { - assert(dst->items[l].ptr != nullptr); - --l; - } - } - } else { - /* from begin to end with dst shrinking (a lot of new overflow pages) */ - for (l = s = d = 1; s <= src->length && d <= dst->length;) { - if (unlikely(l >= d)) { - /* squash to get a gap of free space for merge */ - for (r = w = dst->length; r >= d; --r) - if (dst->items[r].ptr) { - if (w != r) { - dst->items[w] = dst->items[r]; - dst->items[r].ptr = nullptr; - } - --w; - } - mdbx_notice("squash to end for shrinking-merge %u -> %u", d, w + 1); - d = w + 1; - continue; - } - assert(l < d); - if (dst->items[d].ptr) { - dst->items[l++] = (dst->items[d].pgno < src->items[s].pgno) - ? dst->items[d++] - : src->items[s++]; - } else - ++d; - } - if (s <= src->length) { - assert(dst->sorted - l == src->length - s); - while (d <= dst->length) { - assert(dst->items[d].ptr == nullptr); - --d; - } - do { - assert(l <= dst->sorted); - dst->items[l++] = src->items[s++]; - } while (s <= src->length); - } else { - assert(dst->sorted - l == dst->length - d); - while (l <= dst->sorted) { - assert(l <= d && d <= dst->length && dst->items[d].ptr); - dst->items[l++] = dst->items[d++]; - } - } - } - parent->tw.dirtyroom -= dst->sorted - dst->length; - assert(parent->tw.dirtyroom <= parent->mt_env->me_options.dp_limit); - dst->length = dst->sorted; - mdbx_tassert(parent, - parent->mt_parent || - parent->tw.dirtyroom + parent->tw.dirtylist->length == - parent->mt_env->me_options.dp_limit); - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - mdbx_dpl_free(txn); - - if (txn->tw.spill_pages) { - if (parent->tw.spill_pages) { - /* Must not fail since space was preserved above. */ - mdbx_pnl_xmerge(parent->tw.spill_pages, txn->tw.spill_pages); - mdbx_pnl_free(txn->tw.spill_pages); - } else { - parent->tw.spill_pages = txn->tw.spill_pages; - parent->tw.spill_least_removed = txn->tw.spill_least_removed; - } - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - } - - parent->mt_flags &= ~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; - } -} - -int mdbx_txn_commit_ex(MDBX_txn *txn, MDBX_commit_latency *latency) { - STATIC_ASSERT(MDBX_TXN_FINISHED == - MDBX_TXN_BLOCKED - MDBX_TXN_HAS_CHILD - MDBX_TXN_ERROR); - const uint64_t ts_0 = latency ? mdbx_osal_monotime() : 0; - uint64_t ts_1 = 0, ts_2 = 0, ts_3 = 0, ts_4 = 0; - uint32_t audit_duration = 0; - - int rc = check_txn(txn, MDBX_TXN_FINISHED); - if (unlikely(rc != MDBX_SUCCESS)) - goto provide_latency; - - if (unlikely(txn->mt_flags & MDBX_TXN_ERROR)) { - rc = MDBX_RESULT_TRUE; - goto fail; - } - - MDBX_env *env = txn->mt_env; -#if MDBX_ENV_CHECKPID - if (unlikely(env->me_pid != mdbx_getpid())) { - env->me_flags |= MDBX_FATAL_ERROR; - rc = MDBX_PANIC; - goto provide_latency; - } -#endif /* MDBX_ENV_CHECKPID */ - - /* mdbx_txn_end() mode for a commit which writes nothing */ - unsigned end_mode = - MDBX_END_PURE_COMMIT | MDBX_END_UPDATE | MDBX_END_SLOT | MDBX_END_FREE; - if (unlikely(F_ISSET(txn->mt_flags, MDBX_TXN_RDONLY))) - goto done; - - if (txn->mt_child) { - rc = mdbx_txn_commit_ex(txn->mt_child, NULL); - 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_tassert(txn, mdbx_audit_ex(txn, 0, false) == 0); - mdbx_assert(env, txn != env->me_txn0); - MDBX_txn *const parent = txn->mt_parent; - mdbx_assert(env, parent->mt_signature == MDBX_MT_SIGNATURE); - mdbx_assert(env, parent->mt_child == txn && - (parent->mt_flags & MDBX_TXN_HAS_CHILD) != 0); - mdbx_assert(env, mdbx_dirtylist_check(txn)); - - if (txn->tw.dirtylist->length == 0 && !(txn->mt_flags & MDBX_TXN_DIRTY) && - parent->mt_numdbs == txn->mt_numdbs) { - for (int i = txn->mt_numdbs; --i >= 0;) { - mdbx_tassert(txn, (txn->mt_dbistate[i] & DBI_DIRTY) == 0); - if ((txn->mt_dbistate[i] & DBI_STALE) && - !(parent->mt_dbistate[i] & DBI_STALE)) - mdbx_tassert(txn, memcmp(&parent->mt_dbs[i], &txn->mt_dbs[i], - sizeof(MDBX_db)) == 0); - } - - mdbx_tassert(txn, memcmp(&parent->mt_geo, &txn->mt_geo, - sizeof(parent->mt_geo)) == 0); - mdbx_tassert(txn, memcmp(&parent->mt_canary, &txn->mt_canary, - sizeof(parent->mt_canary)) == 0); - mdbx_tassert(txn, !txn->tw.spill_pages || - MDBX_PNL_SIZE(txn->tw.spill_pages) == 0); - mdbx_tassert(txn, txn->tw.loose_count == 0); - - /* fast completion of pure nested transaction */ - end_mode = MDBX_END_PURE_COMMIT | MDBX_END_SLOT | MDBX_END_FREE; - goto done; - } - - /* Preserve space for spill list to avoid parent's state corruption - * if allocation fails. */ - const unsigned parent_retired_len = - (unsigned)(uintptr_t)parent->tw.retired_pages; - mdbx_tassert(txn, - parent_retired_len <= MDBX_PNL_SIZE(txn->tw.retired_pages)); - const unsigned retired_delta = - MDBX_PNL_SIZE(txn->tw.retired_pages) - parent_retired_len; - if (retired_delta) { - rc = mdbx_pnl_need(&txn->tw.reclaimed_pglist, retired_delta); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - - if (txn->tw.spill_pages) { - if (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; - } - mdbx_spill_purge(txn); - } - - if (unlikely(txn->tw.dirtylist->length + parent->tw.dirtylist->length > - parent->tw.dirtylist->allocated && - !mdbx_dpl_reserve(parent, txn->tw.dirtylist->length + - parent->tw.dirtylist->length))) { - rc = MDBX_ENOMEM; - 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; - - /* Move loose pages to parent */ -#if MDBX_ENABLE_REFUND - parent->tw.loose_refund_wl = txn->tw.loose_refund_wl; -#endif /* MDBX_ENABLE_REFUND */ - parent->tw.loose_count = txn->tw.loose_count; - parent->tw.loose_pages = txn->tw.loose_pages; - - /* Merge our cursors into parent's and close them */ - mdbx_cursors_eot(txn, true); - end_mode |= MDBX_END_EOTDONE; - - /* Update parent's DBs array */ - memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDBX_db)); - parent->mt_numdbs = txn->mt_numdbs; - parent->mt_dbistate[FREE_DBI] = txn->mt_dbistate[FREE_DBI]; - parent->mt_dbistate[MAIN_DBI] = txn->mt_dbistate[MAIN_DBI]; - for (unsigned i = CORE_DBS; i < txn->mt_numdbs; i++) { - /* preserve parent's status */ - const uint8_t state = - txn->mt_dbistate[i] | - (parent->mt_dbistate[i] & (DBI_CREAT | DBI_FRESH | DBI_DIRTY)); - mdbx_debug("db %u dbi-state %s 0x%02x -> 0x%02x", i, - (parent->mt_dbistate[i] != state) ? "update" : "still", - parent->mt_dbistate[i], state); - parent->mt_dbistate[i] = state; - } - - ts_1 = latency ? mdbx_osal_monotime() : 0; - mdbx_txn_merge(parent, txn, parent_retired_len); - ts_2 = latency ? mdbx_osal_monotime() : 0; - env->me_txn = parent; - parent->mt_child = NULL; - mdbx_tassert(parent, mdbx_dirtylist_check(parent)); - -#if MDBX_ENABLE_REFUND - mdbx_refund(parent); - if (mdbx_assert_enabled()) { - /* Check parent's loose pages not suitable for refund */ - for (MDBX_page *lp = parent->tw.loose_pages; lp; lp = lp->mp_next) - mdbx_tassert(parent, lp->mp_pgno < parent->tw.loose_refund_wl && - lp->mp_pgno + 1 < parent->mt_next_pgno); - /* Check parent's reclaimed pages not suitable for refund */ - if (MDBX_PNL_SIZE(parent->tw.reclaimed_pglist)) - mdbx_tassert(parent, MDBX_PNL_MOST(parent->tw.reclaimed_pglist) + 1 < - parent->mt_next_pgno); - } -#endif /* MDBX_ENABLE_REFUND */ - - ts_4 = ts_3 = latency ? mdbx_osal_monotime() : 0; - txn->mt_signature = 0; - mdbx_free(txn); - mdbx_tassert(parent, mdbx_audit_ex(parent, 0, false) == 0); - rc = MDBX_SUCCESS; - goto provide_latency; - } - - mdbx_tassert(txn, txn->tw.dirtyroom + txn->tw.dirtylist->length == - txn->mt_env->me_options.dp_limit); - mdbx_cursors_eot(txn, false); - 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_dbistate[i] & DBI_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_couple couple; - MDBX_val data; - data.iov_len = sizeof(MDBX_db); - - rc = mdbx_cursor_init(&couple.outer, txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - for (MDBX_dbi i = CORE_DBS; i < txn->mt_numdbs; i++) { - if (txn->mt_dbistate[i] & DBI_DIRTY) { - if (unlikely(TXN_DBI_CHANGED(txn, i))) { - rc = MDBX_BAD_DBI; - goto fail; - } - MDBX_db *db = &txn->mt_dbs[i]; - mdbx_debug("update main's entry for sub-db %u, mod_txnid %" PRIaTXN - " -> %" PRIaTXN, - i, pp_txnid2chk(txn), db->md_mod_txnid); - db->md_mod_txnid = pp_txnid2chk(txn); - data.iov_base = db; - WITH_CURSOR_TRACKING(couple.outer, - rc = mdbx_cursor_put(&couple.outer, - &txn->mt_dbxs[i].md_name, - &data, F_SUBDATA)); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - } - } - - ts_1 = latency ? mdbx_osal_monotime() : 0; - rc = mdbx_update_gc(txn); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - - ts_2 = latency ? mdbx_osal_monotime() : 0; - if (mdbx_audit_enabled()) { - rc = mdbx_audit_ex(txn, MDBX_PNL_SIZE(txn->tw.retired_pages), true); - const uint64_t audit_end = mdbx_osal_monotime(); - audit_duration = mdbx_osal_monotime_to_16dot16(audit_end - ts_2); - ts_2 = audit_end; - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } - - rc = mdbx_page_flush(txn, 0); - ts_3 = latency ? mdbx_osal_monotime() : 0; - if (likely(rc == MDBX_SUCCESS)) { - if (txn->mt_dbs[MAIN_DBI].md_flags & DBI_DIRTY) - txn->mt_dbs[MAIN_DBI].md_mod_txnid = pp_txnid2chk(txn); - - MDBX_meta meta, *head = mdbx_meta_head(env); - memcpy(meta.mm_magic_and_version, head->mm_magic_and_version, 8); - meta.mm_extra_flags = head->mm_extra_flags; - meta.mm_validator_id = head->mm_validator_id; - meta.mm_extra_pagehdr = head->mm_extra_pagehdr; - unaligned_poke_u64(4, meta.mm_pages_retired, - unaligned_peek_u64(4, 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); - } - ts_4 = latency ? mdbx_osal_monotime() : 0; - 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: - rc = mdbx_txn_end(txn, end_mode); - -provide_latency: - if (latency) { - latency->audit = audit_duration; - latency->preparation = - ts_1 ? mdbx_osal_monotime_to_16dot16(ts_1 - ts_0) : 0; - latency->gc = - (ts_1 && ts_2) ? mdbx_osal_monotime_to_16dot16(ts_2 - ts_1) : 0; - latency->write = - (ts_2 && ts_3) ? mdbx_osal_monotime_to_16dot16(ts_3 - ts_2) : 0; - latency->sync = - (ts_3 && ts_4) ? mdbx_osal_monotime_to_16dot16(ts_4 - ts_3) : 0; - const uint64_t ts_5 = mdbx_osal_monotime(); - latency->ending = ts_4 ? mdbx_osal_monotime_to_16dot16(ts_5 - ts_4) : 0; - latency->whole = mdbx_osal_monotime_to_16dot16(ts_5 - ts_0); - } - return rc; - -fail: - mdbx_txn_abort(txn); - goto provide_latency; -} - -static __cold int -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) { - const uint64_t magic_and_version = - unaligned_peek_u64(4, &meta->mm_magic_and_version); - if (magic_and_version != MDBX_DATA_MAGIC && - magic_and_version != MDBX_DATA_MAGIC_DEVEL) { - mdbx_error("meta[%u] has invalid magic/version %" PRIx64, meta_number, - magic_and_version); - return ((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_warning("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 (unaligned_peek_u64(4, &meta->mm_txnid_a) != - unaligned_peek_u64(4, &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) && - unaligned_peek_u64(4, &meta->mm_datasync_sign) != mdbx_meta_sign(meta)) { - mdbx_warning("meta[%u] has invalid steady-checksum (0x%" PRIx64 - " != 0x%" PRIx64 "), skip it", - meta_number, unaligned_peek_u64(4, &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, - unaligned_peek_u64(4, meta->mm_txnid_a), mdbx_durable_str(meta)); - - /* LY: check min-pages value */ - if (meta->mm_geo.lower < MIN_PAGENO || meta->mm_geo.lower > MAX_PAGENO) { - mdbx_warning("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_warning("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_warning("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_warning("meta[%u] used-bytes (%" PRIu64 ") beyond filesize (%" PRIu64 - "), skip it", - meta_number, used_bytes, *filesize); - return MDBX_CORRUPTED; - } - } - if (meta->mm_geo.next - 1 > MAX_PAGENO || used_bytes > MAX_MAPSIZE) { - mdbx_warning("meta[%u] has too large used-space (%" PRIu64 "), skip it", - meta_number, used_bytes); - return MDBX_TOO_LARGE; - } - - /* 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) { - if (MAX_MAPSIZE != MAX_MAPSIZE64 && mapsize_min > MAX_MAPSIZE && - mapsize_min <= MAX_MAPSIZE64) { - mdbx_assert(env, meta->mm_geo.next - 1 <= MAX_PAGENO && - used_bytes <= MAX_MAPSIZE); - mdbx_warning("meta[%u] has too large min-mapsize (%" PRIu64 "), " - "but size of used space still acceptable (%" PRIu64 ")", - meta_number, mapsize_min, used_bytes); - meta->mm_geo.lower = (pgno_t)(MAX_MAPSIZE / meta->mm_psize); - } else { - mdbx_warning("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) { - /* allow to open large DB from a 32-bit environment */ - mdbx_assert(env, meta->mm_geo.next - 1 <= MAX_PAGENO && - used_bytes <= MAX_MAPSIZE); - mdbx_warning("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_warning("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_warning("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_warning("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_warning("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_warning("meta[%u] has invalid maindb-root %" PRIaPGNO ", skip it", - meta_number, meta->mm_dbs[MAIN_DBI].md_root); - return MDBX_CORRUPTED; - } - - if (unaligned_peek_u64(4, &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 __cold int 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)); - unaligned_poke_u64(4, 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_warning("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 ((env->me_stuck_meta < 0) - ? mdbx_meta_ot(meta_bootid_match(meta) ? prefer_last - : prefer_steady, - env, dest, meta) - : (meta_number == (unsigned)env->me_stuck_meta)) { - *dest = *meta; - if (!lck_exclusive && !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 || - ((env->me_stuck_meta < 0) - ? (!META_IS_STEADY(dest) && - !meta_weak_acceptable(env, dest, lck_exclusive)) - : false)) { - mdbx_error("%s", "no usable meta-pages, database is corrupted"); - if (rc == MDBX_SUCCESS) { - /* TODO: try to restore the database by fully checking b-tree structure - * for the each meta page, if the corresponding option was given */ - return MDBX_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); - unaligned_poke_u64(4, 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); - unaligned_poke_u64(4, 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 recently (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 size_t mdbx_madvise_threshold(const MDBX_env *env, - const size_t largest_bytes) { - /* TODO: use options */ - const unsigned factor = 9; - const size_t threshold = (largest_bytes < (65536ul << factor)) - ? 65536 /* minimal threshold */ - : (largest_bytes > (MEGABYTE * 4 << factor)) - ? MEGABYTE * 4 /* maximal threshold */ - : largest_bytes >> factor; - return bytes_align2os_bytes(env, threshold); -} - -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); - int rc; - - 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) { - /* Check auto-sync conditions */ - const pgno_t autosync_threshold = - atomic_load32(env->me_autosync_threshold, mo_Relaxed); - const uint64_t autosync_period = - atomic_load64(env->me_autosync_period, mo_Relaxed); - if ((autosync_threshold && - atomic_load32(env->me_unsynced_pages, mo_Relaxed) >= - autosync_threshold) || - (autosync_period && - mdbx_osal_monotime() - - atomic_load64(env->me_sync_timestamp, mo_Relaxed) >= - 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_threshold = mdbx_madvise_threshold(env, largest_bytes); - const size_t discard_edge_bytes = bytes_align2os_bytes( - env, ((MDBX_RDONLY & - (env->me_lck ? env->me_lck->mti_envmode.weak : env->me_flags)) - ? largest_bytes - : largest_bytes + madvise_threshold)); - const pgno_t discard_edge_pgno = bytes2pgno(env, discard_edge_bytes); - const pgno_t prev_discarded_pgno = - atomic_load32(env->me_discarded_tail, mo_AcquireRelease); - if (prev_discarded_pgno >= - discard_edge_pgno + bytes2pgno(env, madvise_threshold)) { - mdbx_notice("open-MADV_%s %u..%u", "DONTNEED", prev_discarded_pgno, - largest_pgno); - atomic_store32(env->me_discarded_tail, discard_edge_pgno, - mo_AcquireRelease); - 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 (unlikely(mdbx_meta_txnid_stable(env, head) == - unaligned_peek_u64(4, pending->mm_txnid_a))) { - const txnid_t txnid = - safe64_txnid_next(unaligned_peek_u64(4, pending->mm_txnid_a)); - if (unlikely(txnid > MAX_TXNID)) { - rc = MDBX_TXN_FULL; - mdbx_error("txnid overflow, raise %d", rc); - goto fail; - } - mdbx_meta_set_txnid(env, pending, txnid); - } - } - } - } - } - - /* LY: step#1 - sync previously written/updated data-pages */ - rc = MDBX_RESULT_FALSE /* carry steady */; - if (atomic_load32(env->me_unsynced_pages, mo_AcquireRelease)) { - mdbx_assert(env, ((flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); - enum mdbx_syncmode_bits mode_bits = MDBX_SYNC_NONE; - if ((flags & MDBX_SAFE_NOSYNC) == 0) { - mode_bits = MDBX_SYNC_DATA; - if (pending->mm_geo.next > mdbx_meta_steady(env)->mm_geo.now) - mode_bits |= MDBX_SYNC_SIZE; - if (flags & MDBX_NOMETASYNC) - mode_bits |= MDBX_SYNC_IODQ; - } - if (flags & MDBX_WRITEMAP) - rc = - mdbx_msync(&env->me_dxb_mmap, 0, - pgno_align2os_bytes(env, pending->mm_geo.next), mode_bits); - else - rc = mdbx_fsync(env->me_lazy_fd, mode_bits); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - rc = (flags & MDBX_SAFE_NOSYNC) ? MDBX_RESULT_TRUE /* carry non-steady */ - : MDBX_RESULT_FALSE /* carry steady */; - } - - /* Steady or Weak */ - if (rc == MDBX_RESULT_FALSE /* carry steady */) { - atomic_store64(env->me_sync_timestamp, mdbx_osal_monotime(), mo_Relaxed); - unaligned_poke_u64(4, pending->mm_datasync_sign, mdbx_meta_sign(pending)); - atomic_store32(env->me_unsynced_pages, 0, mo_AcquireRelease); - } else { - assert(rc == MDBX_RESULT_TRUE /* carry non-steady */); - unaligned_poke_u64(4, pending->mm_datasync_sign, MDBX_DATASIGN_WEAK); - } - - MDBX_meta *target = nullptr; - if (mdbx_meta_txnid_stable(env, head) == - unaligned_peek_u64(4, pending->mm_txnid_a)) { - 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, - unaligned_peek_u64(4, pending->mm_txnid_a), - 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) < - unaligned_peek_u64(4, pending->mm_txnid_a)); - if (flags & MDBX_WRITEMAP) { - mdbx_jitter4testing(true); - if (likely(target != head)) { - /* LY: 'invalidate' the meta. */ - mdbx_meta_update_begin(env, target, - unaligned_peek_u64(4, pending->mm_txnid_a)); - unaligned_poke_u64(4, 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; - memcpy(target->mm_pages_retired, pending->mm_pages_retired, 8); - mdbx_jitter4testing(true); - - /* LY: 'commit' the meta */ - mdbx_meta_update_end(env, target, - unaligned_peek_u64(4, pending->mm_txnid_b)); - 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) == - unaligned_peek_u64(4, pending->mm_txnid_a) && - !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); - } - memcpy(target->mm_datasync_sign, pending->mm_datasync_sign, 8); - mdbx_flush_incoherent_cpu_writeback(); - mdbx_jitter4testing(true); - /* sync meta-pages */ - rc = - mdbx_msync(&env->me_dxb_mmap, 0, pgno_align2os_bytes(env, NUM_METAS), - (flags & MDBX_NOMETASYNC) ? MDBX_SYNC_NONE - : MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - if (unlikely(rc != MDBX_SUCCESS)) - goto fail; - } 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); - /* sync meta-pages */ - if ((flags & MDBX_NOMETASYNC) == 0 && fd == env->me_lazy_fd) { - rc = mdbx_fsync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - if (rc != MDBX_SUCCESS) - goto undo; - } - } - if (flags & MDBX_NOMETASYNC) - env->me_unsynced_pages->weak += 1; - else - env->me_meta_sync_txnid->weak = - (uint32_t)unaligned_peek_u64(4, pending->mm_txnid_a); - - /* LY: shrink datafile if needed */ - if (unlikely(shrink)) { - mdbx_verbose("shrink to %" PRIaPGNO " pages (-%" PRIaPGNO ")", - pending->mm_geo.now, shrink); - rc = mdbx_mapresize_implicit(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 */ - atomic_store32(&env->me_lck->mti_readers_refresh_flag, false, - mo_AcquireRelease); - - 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_PGL_LIMIT / 4); - const intptr_t maxgc_ov1page = (pagesize - PAGEHDRSZ) / sizeof(pgno_t) - 1; - mdbx_ensure(env, maxgc_ov1page > 42 && - maxgc_ov1page < (intptr_t)MDBX_PGL_LIMIT / 4); - 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_psize2log = (uint8_t)log2n(pagesize); - mdbx_assert(env, pgno2bytes(env, 1) == pagesize); - mdbx_assert(env, bytes2pgno(env, pagesize + pagesize) == 2); - - const pgno_t max_pgno = bytes2pgno(env, MAX_MAPSIZE); - if (env->me_options.dp_limit > max_pgno - NUM_METAS) - env->me_options.dp_limit = max_pgno - NUM_METAS; - if (env->me_options.dp_initial > env->me_options.dp_limit) - env->me_options.dp_initial = env->me_options.dp_limit; -} - -__cold int 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(); - env->me_stuck_meta = -1; - - env->me_options.dp_reserve_limit = 1024; - env->me_options.rp_augment_limit = 256 * 1024; - env->me_options.dp_limit = 64 * 1024; - if (env->me_options.dp_limit > MAX_PAGENO - NUM_METAS) - env->me_options.dp_limit = MAX_PAGENO - NUM_METAS; - env->me_options.dp_initial = MDBX_PNL_INITIAL; - if (env->me_options.dp_initial > env->me_options.dp_limit) - env->me_options.dp_initial = env->me_options.dp_limit; - env->me_options.spill_max_denominator = 8; - env->me_options.spill_min_denominator = 8; - env->me_options.spill_parent4child_denominator = 0; - env->me_options.dp_loose_limit = 64; - - 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 < MAX_PAGESIZE) ? env->me_os_psize - : MAX_PAGESIZE); - - 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.weak = 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) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - 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; - 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 >= INT_MAX) - 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; - - /* is requested some auto-value for pagesize ? */ - if (pagesize >= INT_MAX /* maximal */) - pagesize = MAX_PAGESIZE; - else if (pagesize <= 0) { - if (pagesize < 0 /* default */) { - pagesize = env->me_os_psize; - if ((uintptr_t)pagesize > MAX_PAGESIZE) - pagesize = MAX_PAGESIZE; - mdbx_assert(env, (uintptr_t)pagesize >= MIN_PAGESIZE); - } else if (pagesize == 0 /* minimal */) - pagesize = MIN_PAGESIZE; - - /* choose pagesize */ - intptr_t max_size = (size_now > size_lower) ? size_now : size_lower; - max_size = (size_upper > max_size) ? size_upper : max_size; - if (max_size < 0 /* default */) - max_size = DEFAULT_MAPSIZE; - else if (max_size == 0 /* minimal */) - max_size = MIN_MAPSIZE; - else if (max_size >= (intptr_t)MAX_MAPSIZE /* maximal */) - max_size = MAX_MAPSIZE; - - while (max_size > pagesize * (int64_t)MAX_PAGENO && - pagesize < MAX_PAGESIZE) - pagesize <<= 1; - } - } - - 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_lower == INTPTR_MAX) - size_lower = MAX_MAPSIZE; - - 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_now == INTPTR_MAX) - size_now = MAX_MAPSIZE; - - 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 - : (size_t)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; - } - int err = mdbx_rdt_lock(env); - if (unlikely(MDBX_IS_ERROR(err))) { - rc = err; - 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 + - atomic_load32(&env->me_lck->mti_numreaders, mo_AcquireRelease); - for (const MDBX_reader *reader = begin; reader < end; ++reader) { - if (reader->mr_pid.weak == env->me_pid && reader->mr_tid.weak && - reader->mr_tid.weak != 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, - false); - 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 { - meta.mm_geo = new_geo; - const txnid_t txnid = - safe64_txnid_next(mdbx_meta_txnid_stable(env, head)); - if (unlikely(txnid > MAX_TXNID)) { - rc = MDBX_TXN_FULL; - mdbx_error("txnid overflow, raise %d", rc); - goto bailout; - } - mdbx_meta_set_txnid(env, &meta, txnid); - 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; -} - -__cold int mdbx_env_set_mapsize(MDBX_env *env, size_t size) { - return __inline_mdbx_env_set_mapsize(env, size); -} - -__cold int mdbx_env_set_maxdbs(MDBX_env *env, MDBX_dbi dbs) { - return __inline_mdbx_env_set_maxdbs(env, dbs); -} - -__cold int mdbx_env_get_maxdbs(const MDBX_env *env, MDBX_dbi *dbs) { - return __inline_mdbx_env_get_maxdbs(env, dbs); -} - -__cold int mdbx_env_set_maxreaders(MDBX_env *env, unsigned readers) { - return __inline_mdbx_env_set_maxreaders(env, readers); -} - -__cold int mdbx_env_get_maxreaders(const MDBX_env *env, unsigned *readers) { - return __inline_mdbx_env_get_maxreaders(env, readers); -} - -/* Further setup required for opening an MDBX environment */ -static __cold int 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 || - /* recovery mode */ env->me_stuck_meta >= 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, - unaligned_peek_u64(4, meta.mm_txnid_a), 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 */ - || /* recovery mode */ env->me_stuck_meta >= 0) { - /* 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: err %d", "could not apply preconfigured geometry from db", - err); - return (err == MDBX_EINVAL) ? MDBX_INCOMPATIBLE : err; - } - } 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: err %d", "could not apply preconfigured db-geometry", - err); - return (err == MDBX_EINVAL) ? MDBX_INCOMPATIBLE : err; - } - - /* 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, - unaligned_peek_u64(4, meta.mm_txnid_a), - 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_warning("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-"); - - /* calculate readahead hint before mmap with zero redundant pages */ - const bool readahead = - (env->me_flags & MDBX_NORDAHEAD) == 0 && - mdbx_is_readahead_reasonable(used_bytes, 0) == MDBX_RESULT_TRUE; - 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 (unlikely(meta_clash_mask)) { - if (/* not recovery mode */ env->me_stuck_meta < 0) { - mdbx_error("meta-pages are clashed: mask 0x%d", meta_clash_mask); - return MDBX_CORRUPTED; - } else { - mdbx_warning("ignore meta-pages clashing (mask 0x%d) in recovery mode", - meta_clash_mask); - } - } - - while (likely(/* not recovery mode */ env->me_stuck_meta < 0)) { - 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(steady) && !META_IS_STEADY(head)); - 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_warning( - "opening after an unclean shutdown, but boot-id(%016" PRIx64 - "-%016" PRIx64 - ") is MATCH: rollback NOT needed, steady-sync NEEDED%s", - bootid.x, bootid.y, - (env->me_flags & MDBX_RDONLY) ? ", but unable in read-only mode" - : ""); - if (env->me_flags & MDBX_RDONLY) - return MDBX_WANNA_RECOVERY /* LY: could not recovery/sync */; - meta = clone; - atomic_store32(env->me_unsynced_pages, meta.mm_geo.next, mo_Relaxed); - break; - } - mdbx_warning("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); - } - 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 */; - } - - 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_notice("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 */ - unaligned_poke_u64(4, head->mm_txnid_a, undo_txnid); - unaligned_poke_u64(4, head->mm_datasync_sign, MDBX_DATASIGN_WEAK); - unaligned_poke_u64(4, head->mm_txnid_b, 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); - unaligned_poke_u64(4, 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 impossible 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) { - meta.mm_geo.now = bytes2pgno(env, env->me_dxb_mmap.current); - mdbx_notice("need 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))) { - if ((env->me_flags & MDBX_RDONLY) != 0 || - /* recovery mode */ env->me_stuck_meta >= 0) { - mdbx_warning("skipped update meta.geo in %s mode: from l%" PRIaPGNO - "-n%" PRIaPGNO "-u%" PRIaPGNO "/s%u-g%u, to l%" PRIaPGNO - "-n%" PRIaPGNO "-u%" PRIaPGNO "/s%u-g%u", - (env->me_stuck_meta < 0) ? "read-only" : "recovery", - head->mm_geo.lower, head->mm_geo.now, head->mm_geo.upper, - head->mm_geo.shrink, head->mm_geo.grow, meta.mm_geo.lower, - meta.mm_geo.now, meta.mm_geo.upper, meta.mm_geo.shrink, - meta.mm_geo.grow); - } else { - const txnid_t txnid = mdbx_meta_txnid_stable(env, head); - const txnid_t next_txnid = safe64_txnid_next(txnid); - if (unlikely(txnid > MAX_TXNID)) { - mdbx_error("txnid overflow, raise %d", MDBX_TXN_FULL); - return MDBX_TXN_FULL; - } - mdbx_notice("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; - } - } - } - } - - atomic_store32(env->me_discarded_tail, bytes2pgno(env, used_aligned2os_bytes), - mo_AcquireRelease); - if (used_aligned2os_bytes < env->me_dxb_mmap.current) { -#if defined(MADV_REMOVE) - if (lck_rc && (env->me_flags & MDBX_WRITEMAP) != 0 && - /* not recovery mode */ env->me_stuck_meta < 0) { - mdbx_notice("open-MADV_%s %u..%u", "REMOVE (deallocate file space)", - env->me_discarded_tail->weak, - 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->weak, - 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 */ - } - - 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 __cold int mdbx_setup_lck(MDBX_env *env, char *lck_pathname, - mdbx_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 && - /* ignore ERROR_NOT_SUPPORTED for exclusive mode */ - !(err == MDBX_ENOSYS && (env->me_flags & MDBX_EXCLUSIVE))) - 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 (maxreaders < 4) { - mdbx_error("lck-size too small (up to %" PRIuPTR " readers)", maxreaders); - err = MDBX_PROBLEM; - goto bailout; - } - env->me_maxreaders = (maxreaders <= MDBX_READERS_LIMIT) - ? (unsigned)maxreaders - : (unsigned)MDBX_READERS_LIMIT; - - 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: exclusive 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; - err = mdbx_msync(&env->me_lck_mmap, 0, (size_t)size, false); - if (unlikely(err != MDBX_SUCCESS)) { - mdbx_error("initial-%s for lck-file failed", "msync"); - goto bailout; - } - err = mdbx_fsync(env->me_lck_mmap.fd, MDBX_SYNC_SIZE); - if (unlikely(err != MDBX_SUCCESS)) { - mdbx_error("initial-%s for lck-file failed", "fsync"); - goto bailout; - } - } 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; -} - -/* Merge sync flags */ -static uint32_t merge_sync_flags(const uint32_t a, const uint32_t b) { - uint32_t r = a | b; - - /* avoid false MDBX_UTTERLY_NOSYNC */ - if (F_ISSET(r, MDBX_UTTERLY_NOSYNC) && !F_ISSET(a, MDBX_UTTERLY_NOSYNC) && - !F_ISSET(b, MDBX_UTTERLY_NOSYNC)) - r = (r - MDBX_UTTERLY_NOSYNC) | MDBX_SAFE_NOSYNC; - - /* convert MDBX_DEPRECATED_MAPASYNC to MDBX_SAFE_NOSYNC */ - if ((r & (MDBX_WRITEMAP | MDBX_DEPRECATED_MAPASYNC)) == - (MDBX_WRITEMAP | MDBX_DEPRECATED_MAPASYNC) && - !F_ISSET(r, MDBX_UTTERLY_NOSYNC)) - r = (r - MDBX_DEPRECATED_MAPASYNC) | MDBX_SAFE_NOSYNC; - - /* force MDBX_NOMETASYNC if MDBX_SAFE_NOSYNC enabled */ - if (r & MDBX_SAFE_NOSYNC) - r |= MDBX_NOMETASYNC; - - assert(!(F_ISSET(r, MDBX_UTTERLY_NOSYNC) && - !F_ISSET(a, MDBX_UTTERLY_NOSYNC) && - !F_ISSET(b, MDBX_UTTERLY_NOSYNC))); - return r; -} - -__cold int mdbx_env_turn_for_recovery(MDBX_env *env, unsigned target_meta) { - if (unlikely(target_meta >= NUM_METAS)) - return MDBX_EINVAL; - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if ((env->me_flags & (MDBX_EXCLUSIVE | MDBX_RDONLY)) != MDBX_EXCLUSIVE) - return MDBX_EPERM; - - MDBX_page *page = - (env->me_flags & MDBX_WRITEMAP) - ? pgno2page(env, target_meta) - : memcpy(env->me_pbuf, pgno2page(env, target_meta), env->me_psize); - page->mp_pgno = target_meta; - page->mp_flags = P_META; - - MDBX_meta *meta = page_meta(page); - unaligned_poke_u64(4, meta->mm_magic_and_version, MDBX_DATA_MAGIC); - meta->mm_psize = env->me_psize; - txnid_t txnid = mdbx_meta_txnid_stable(env, meta); - const txnid_t txnid0 = mdbx_meta_txnid_stable(env, METAPAGE(env, 0)); - if (target_meta != 0 && txnid <= txnid0) - txnid = safe64_txnid_next(txnid0); - const txnid_t txnid1 = mdbx_meta_txnid_stable(env, METAPAGE(env, 1)); - if (target_meta != 1 && txnid <= txnid1) - txnid = safe64_txnid_next(txnid1); - const txnid_t txnid2 = mdbx_meta_txnid_stable(env, METAPAGE(env, 2)); - if (target_meta != 2 && txnid <= txnid2) - txnid = safe64_txnid_next(txnid2); - - if (!META_IS_STEADY(meta) || mdbx_recent_committed_txnid(env) != txnid) { - if (unlikely(txnid > MAX_TXNID)) { - mdbx_error("txnid overflow, raise %d", MDBX_TXN_FULL); - return MDBX_TXN_FULL; - } - mdbx_meta_set_txnid(env, meta, txnid); - unaligned_poke_u64(4, meta->mm_datasync_sign, mdbx_meta_sign(meta)); - } - - if (env->me_flags & MDBX_WRITEMAP) { - mdbx_flush_incoherent_cpu_writeback(); - rc = mdbx_msync(&env->me_dxb_mmap, 0, pgno_align2os_bytes(env, target_meta), - MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - } else { - const mdbx_filehandle_t fd = (env->me_dsync_fd != INVALID_HANDLE_VALUE) - ? env->me_dsync_fd - : env->me_lazy_fd; - rc = mdbx_pwrite(fd, page, env->me_psize, pgno2bytes(env, target_meta)); - if (rc == MDBX_SUCCESS && fd == env->me_lazy_fd) - rc = mdbx_fsync(env->me_lazy_fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - } - - return rc; -} - -__cold int mdbx_env_open_for_recovery(MDBX_env *env, const char *pathname, - unsigned target_meta, bool writeable) { - if (unlikely(target_meta >= NUM_METAS)) - return MDBX_EINVAL; - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - env->me_stuck_meta = (int8_t)target_meta; - return mdbx_env_open( - env, pathname, writeable ? MDBX_EXCLUSIVE : MDBX_EXCLUSIVE | MDBX_RDONLY, - 0); -} - -typedef struct { - void *buffer_for_free; - char *lck, *dxb; - size_t ent_len; -} MDBX_handle_env_pathname; - -__cold static int mdbx_handle_env_pathname(MDBX_handle_env_pathname *ctx, - const char *pathname, - MDBX_env_flags_t *flags, - const mdbx_mode_t mode) { - int rc; - memset(ctx, 0, sizeof(*ctx)); - if (unlikely(!pathname)) - return MDBX_EINVAL; - -#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; - - const DWORD dwAttrib = GetFileAttributesW(pathnameW); - if (dwAttrib == INVALID_FILE_ATTRIBUTES) { - rc = GetLastError(); - if (rc != MDBX_ENOFILE) - return rc; - if (mode == 0 || (*flags & MDBX_RDONLY) != 0) - /* can't open existing */ - return rc; - - /* auto-create directory if requested */ - if ((*flags & MDBX_NOSUBDIR) == 0 && - !CreateDirectoryW(pathnameW, nullptr)) { - rc = GetLastError(); - if (rc != ERROR_ALREADY_EXISTS) - return rc; - } - } else { - /* ignore passed MDBX_NOSUBDIR flag and set it automatically */ - *flags |= MDBX_NOSUBDIR; - if (dwAttrib & FILE_ATTRIBUTE_DIRECTORY) - *flags -= MDBX_NOSUBDIR; - } -#else - struct stat st; - if (stat(pathname, &st)) { - rc = errno; - if (rc != MDBX_ENOFILE) - return rc; - if (mode == 0 || (*flags & MDBX_RDONLY) != 0) - /* can't open existing */ - return rc; - - /* auto-create directory if requested */ - const mdbx_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 ((*flags & MDBX_NOSUBDIR) == 0 && mkdir(pathname, dir_mode)) { - rc = errno; - if (rc != EEXIST) - return rc; - } - } else { - /* ignore passed MDBX_NOSUBDIR flag and set it automatically */ - *flags |= MDBX_NOSUBDIR; - if (S_ISDIR(st.st_mode)) - *flags -= MDBX_NOSUBDIR; - } -#endif - - static const char dxb_name[] = MDBX_DATANAME; - static const size_t dxb_name_len = sizeof(dxb_name) - 1; - static const char lck_name[] = MDBX_LOCKNAME; - static const char lock_suffix[] = MDBX_LOCK_SUFFIX; - - ctx->ent_len = strlen(pathname); - if ((*flags & MDBX_NOSUBDIR) && ctx->ent_len >= dxb_name_len && - !memcmp(dxb_name, pathname + ctx->ent_len - dxb_name_len, dxb_name_len)) { - *flags -= MDBX_NOSUBDIR; - ctx->ent_len -= dxb_name_len; - } - - const size_t bytes_needed = - ctx->ent_len * 2 + ((*flags & MDBX_NOSUBDIR) - ? sizeof(lock_suffix) + 1 - : sizeof(lck_name) + sizeof(dxb_name)); - ctx->buffer_for_free = mdbx_malloc(bytes_needed); - if (!ctx->buffer_for_free) - return MDBX_ENOMEM; - - ctx->lck = ctx->buffer_for_free; - if (*flags & MDBX_NOSUBDIR) { - ctx->dxb = ctx->lck + ctx->ent_len + sizeof(lock_suffix); - sprintf(ctx->lck, "%s%s", pathname, lock_suffix); - strcpy(ctx->dxb, pathname); - } else { - ctx->dxb = ctx->lck + ctx->ent_len + sizeof(lck_name); - sprintf(ctx->lck, "%.*s%s", (int)ctx->ent_len, pathname, lck_name); - sprintf(ctx->dxb, "%.*s%s", (int)ctx->ent_len, pathname, dxb_name); - } - - return MDBX_SUCCESS; -} - -__cold int mdbx_env_delete(const char *pathname, MDBX_env_delete_mode_t mode) { - switch (mode) { - default: - return MDBX_EINVAL; - case MDBX_ENV_JUST_DELETE: - case MDBX_ENV_ENSURE_UNUSED: - case MDBX_ENV_WAIT_FOR_UNUSED: - break; - } - - MDBX_env dummy_env; - memset(&dummy_env, 0, sizeof(dummy_env)); - dummy_env.me_flags = - (mode == MDBX_ENV_ENSURE_UNUSED) ? MDBX_EXCLUSIVE : MDBX_ENV_DEFAULTS; - dummy_env.me_os_psize = (unsigned)mdbx_syspagesize(); - dummy_env.me_psize = (unsigned)mdbx_default_pagesize(); - dummy_env.me_pathname = (char *)pathname; - - MDBX_handle_env_pathname env_pathname; - STATIC_ASSERT(sizeof(dummy_env.me_flags) == sizeof(MDBX_env_flags_t)); - int rc = MDBX_RESULT_TRUE, - err = mdbx_handle_env_pathname( - &env_pathname, pathname, (MDBX_env_flags_t *)&dummy_env.me_flags, 0); - if (likely(err == MDBX_SUCCESS)) { - mdbx_filehandle_t clk_handle = INVALID_HANDLE_VALUE, - dxb_handle = INVALID_HANDLE_VALUE; - if (mode > MDBX_ENV_JUST_DELETE) { - err = mdbx_openfile(MDBX_OPEN_DELETE, &dummy_env, env_pathname.dxb, - &dxb_handle, 0); - err = (err == MDBX_ENOFILE) ? MDBX_SUCCESS : err; - if (err == MDBX_SUCCESS) { - err = mdbx_openfile(MDBX_OPEN_DELETE, &dummy_env, env_pathname.lck, - &clk_handle, 0); - err = (err == MDBX_ENOFILE) ? MDBX_SUCCESS : err; - } - if (err == MDBX_SUCCESS && clk_handle != INVALID_HANDLE_VALUE) - err = mdbx_lockfile(clk_handle, mode == MDBX_ENV_WAIT_FOR_UNUSED); - if (err == MDBX_SUCCESS && dxb_handle != INVALID_HANDLE_VALUE) - err = mdbx_lockfile(dxb_handle, mode == MDBX_ENV_WAIT_FOR_UNUSED); - } - - if (err == MDBX_SUCCESS) { - err = mdbx_removefile(env_pathname.dxb); - if (err == MDBX_SUCCESS) - rc = MDBX_SUCCESS; - else if (err == MDBX_ENOFILE) - err = MDBX_SUCCESS; - } - - if (err == MDBX_SUCCESS) { - err = mdbx_removefile(env_pathname.lck); - if (err == MDBX_SUCCESS) - rc = MDBX_SUCCESS; - else if (err == MDBX_ENOFILE) - err = MDBX_SUCCESS; - } - - if (err == MDBX_SUCCESS && !(dummy_env.me_flags & MDBX_NOSUBDIR)) { - err = mdbx_removedirectory(pathname); - if (err == MDBX_SUCCESS) - rc = MDBX_SUCCESS; - else if (err == MDBX_ENOFILE) - err = MDBX_SUCCESS; - } - - if (dxb_handle != INVALID_HANDLE_VALUE) - mdbx_closefile(dxb_handle); - if (clk_handle != INVALID_HANDLE_VALUE) - mdbx_closefile(clk_handle); - } else if (err == MDBX_ENOFILE) - err = MDBX_SUCCESS; - - mdbx_free(env_pathname.buffer_for_free); - return (err == MDBX_SUCCESS) ? rc : err; -} - -__cold int mdbx_env_open(MDBX_env *env, const char *pathname, - MDBX_env_flags_t flags, mdbx_mode_t mode) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (flags & ~ENV_USABLE_FLAGS) - return MDBX_EINVAL; - - if (env->me_lazy_fd != INVALID_HANDLE_VALUE || - (env->me_flags & MDBX_ENV_ACTIVE) != 0) - return MDBX_EPERM; - - /* pickup previously mdbx_env_set_flags(), - * but avoid MDBX_UTTERLY_NOSYNC by disjunction */ - const uint32_t saved_me_flags = env->me_flags; - flags = merge_sync_flags(flags, env->me_flags); - - MDBX_handle_env_pathname env_pathname; - rc = mdbx_handle_env_pathname(&env_pathname, pathname, &flags, mode); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - if (flags & MDBX_RDONLY) { - /* LY: silently ignore irrelevant flags when - * we're only getting read access */ - flags &= ~(MDBX_WRITEMAP | MDBX_DEPRECATED_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_flags = (flags & ~MDBX_FATAL_ERROR) | MDBX_ENV_ACTIVE; - env->me_pathname = mdbx_calloc(env_pathname.ent_len + 1, 1); - 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_pathname && env->me_dbflags && - env->me_dbiseqs)) { - rc = MDBX_ENOMEM; - goto bailout; - } - memcpy(env->me_pathname, env_pathname.dxb, env_pathname.ent_len); - env->me_dbxs[FREE_DBI].md_cmp = cmp_int_align4; /* aligned MDBX_INTEGERKEY */ - env->me_dbxs[FREE_DBI].md_dcmp = cmp_lenfast; - - rc = mdbx_openfile(F_ISSET(flags, MDBX_RDONLY) ? MDBX_OPEN_DXB_READ - : MDBX_OPEN_DXB_LAZY, - env, env_pathname.dxb, &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, env_pathname.dxb, - &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(env_pathname.dxb, 42); - if (env->me_sysv_ipc.key == -1) { - rc = errno; - goto bailout; - } -#endif /* MDBX_LOCKING */ - -#if !(defined(_WIN32) || defined(_WIN64)) - if (mode == 0) { - /* pickup mode for lck-file */ - struct stat st; - if (fstat(env->me_lazy_fd, &st)) { - rc = errno; - goto bailout; - } - mode = st.st_mode; - } - mode = (/* inherit read permissions for group and others */ mode & - (S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) | - /* always add read/write/search for owner */ S_IRUSR | S_IWUSR | - ((mode & S_IRGRP) ? /* +write if readable by group */ S_IWGRP : 0) | - ((mode & S_IROTH) ? /* +write if readable by others */ S_IWOTH : 0); -#endif /* !Windows */ - const int lck_rc = mdbx_setup_lck(env, env_pathname.lck, mode); - if (MDBX_IS_ERROR(lck_rc)) { - rc = lck_rc; - goto bailout; - } - - /* Set the position in files outside of the data to avoid corruption - * due to erroneous use of file descriptors in the application code. */ - mdbx_fseek(env->me_lfd, UINT64_C(1) << 63); - mdbx_fseek(env->me_lazy_fd, UINT64_C(1) << 63); - if (env->me_dsync_fd != INVALID_HANDLE_VALUE) - mdbx_fseek(env->me_dsync_fd, UINT64_C(1) << 63); - - const MDBX_env_flags_t rigorous_flags = - MDBX_SAFE_NOSYNC | MDBX_DEPRECATED_MAPASYNC; - const MDBX_env_flags_t 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 (atomic_load32(&env->me_lck->mti_envmode, mo_AcquireRelease) == - 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.weak ^ 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.weak ^ 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; - } - - if (unlikely(/* recovery mode */ env->me_stuck_meta >= 0) && - (lck_rc != /* exclusive */ MDBX_RESULT_TRUE || - (flags & MDBX_EXCLUSIVE) == 0)) { - mdbx_error("%s", "recovery requires exclusive mode"); - rc = MDBX_BUSY; - goto bailout; - } - - mdbx_debug("opened dbenv %p", (void *)env); - if (env->me_lck) { - if (lck_rc == MDBX_RESULT_TRUE) { - env->me_lck->mti_envmode.weak = - 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_cleanup_dead_readers(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 buffer */), - &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->tw.cursors = (MDBX_cursor **)(txn->mt_dbs + env->me_maxdbs); - txn->mt_dbiseqs = (unsigned *)(txn->tw.cursors + env->me_maxdbs); - txn->mt_dbistate = (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; - rc = mdbx_dpl_alloc(txn); - if (likely(rc == MDBX_SUCCESS)) { - txn->tw.retired_pages = mdbx_pnl_alloc(MDBX_PNL_INITIAL); - txn->tw.reclaimed_pglist = mdbx_pnl_alloc(MDBX_PNL_INITIAL); - if (unlikely(!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)unaligned_peek_u64(4, 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 | ((rc != MDBX_PANIC) ? 0 : MDBX_FATAL_ERROR); - } else { -#if defined(MDBX_USE_VALGRIND) || defined(__SANITIZE_ADDRESS__) - mdbx_txn_valgrind(env, nullptr); -#endif - } - mdbx_free(env_pathname.buffer_for_free); - return rc; -} - -/* Destroy resources from mdbx_env_open(), clear our readers & DBIs */ -static __cold int mdbx_env_close0(MDBX_env *env) { - env->me_stuck_meta = -1; - 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_pathname); - if (env->me_txn0) { - mdbx_dpl_free(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; -} - -__cold int mdbx_env_close_ex(MDBX_env *env, bool dont_sync) { - MDBX_page *dp; - int rc = MDBX_SUCCESS; - - if (unlikely(!env)) - return MDBX_EINVAL; - - if (unlikely(env->me_signature.weak != MDBX_ME_SIGNATURE)) - return MDBX_EBADSIGN; - -#if MDBX_ENV_CHECKPID || !(defined(_WIN32) || defined(_WIN64)) - /* Check the PID even if MDBX_ENV_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_ENV_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 - } - - mdbx_assert(env, env->me_signature.weak == 0); - 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_dp_reserve) != NULL) { - ASAN_UNPOISON_MEMORY_REGION(dp, env->me_psize); - VALGRIND_MAKE_MEM_DEFINED(&dp->mp_next, sizeof(dp->mp_next)); - env->me_dp_reserve = 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 __inline_mdbx_env_close(env); -} - -/* Compare two items pointing at aligned unsigned int's. */ -static int __hot 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 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 unsigned values with unknown alignment. - * - * This is also set as MDBX_INTEGERDUP|MDBX_DUPFIXED's MDBX_dbx.md_dcmp. */ -static int __hot 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 cmp_lexical(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 cmp_reverse(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); -} - -/* Fast non-lexically comparator */ -static int __hot cmp_lenfast(const MDBX_val *a, const MDBX_val *b) { - int diff = CMP2INT(a->iov_len, b->iov_len); - return likely(diff) ? diff : memcmp(a->iov_base, b->iov_base, a->iov_len); -} - -static bool unsure_equal(MDBX_cmp_func cmp, const MDBX_val *a, - const MDBX_val *b) { - return cmp == cmp_lenfast || cmp == cmp_lexical || cmp == cmp_reverse || - cmp == cmp_int_unaligned || cmp_lenfast(a, b) == 0; -} - -/* 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, const 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 == 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 = 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->tw.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 __inline 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); - 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 __inline 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, txnid_t pp_txnid) { - MDBX_txn *txn = mc->mc_txn; - if (unlikely(pgno >= txn->mt_next_pgno)) { - mdbx_error("page #%" PRIaPGNO " beyond next-pgno", pgno); - notfound: - *ret = nullptr; - txn->mt_flags |= MDBX_TXN_ERROR; - return MDBX_PAGE_NOTFOUND; - } - - MDBX_env *const env = txn->mt_env; - MDBX_page *p = nullptr; - mdbx_assert(env, ((txn->mt_flags ^ env->me_flags) & MDBX_WRITEMAP) == 0); - mdbx_assert(env, pp_txnid >= MIN_TXNID && pp_txnid <= txn->mt_txnid); - const uint16_t illegal_bits = - (txn->mt_flags & MDBX_TXN_RDONLY) - ? ~(P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW) - : ~(P_BRANCH | P_LEAF | P_LEAF2 | P_OVERFLOW | P_DIRTY); - int level; - if (unlikely((txn->mt_flags & (MDBX_TXN_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 (unlikely(txn->mt_flags & MDBX_TXN_SPILLS) && txn->tw.spill_pages && - mdbx_pnl_exist(txn->tw.spill_pages, pgno << 1)) { - pp_txnid = txn->mt_txnid; - 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: - *(lvl ? lvl : &level) = level; - *ret = p; - - if (unlikely(p->mp_pgno != pgno)) { - bad_page( - p, "mismatch actual pgno (%" PRIaPGNO ") != expected (%" PRIaPGNO ")\n", - p->mp_pgno, pgno); - goto notfound; - } - - if (unlikely(p->mp_flags & illegal_bits)) { - bad_page(p, "invalid page's flags (%u)\n", p->mp_flags); - goto corrupted; - } - - if (unlikely(p->mp_txnid > - ((p->mp_flags & P_DIRTY) ? UINT64_MAX : pp_txnid))) { - bad_page(p, "page mod-txnid (%" PRIaTXN ") > parent (%" PRIaTXN ")\n", - p->mp_txnid, pp_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))) { - bad_page(p, "invalid page lower(%u)/upper(%u) with limit (%u)\n", - p->mp_lower, p->mp_upper, page_space(env)); - goto corrupted; - } - - if (mdbx_audit_enabled()) - return mdbx_page_check(mc, p, C_UPDATING); - - return MDBX_SUCCESS; - -corrupted: - mc->mc_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, const 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, - pp_txnid4chk(mp, mc->mc_txn))) != 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))) { - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - return bad_page(mp, "index points to a page with 0x%02x flags\n", - mp->mp_flags); - } - - 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_setup_dbx(MDBX_dbx *const dbx, const MDBX_db *const db, - const unsigned pagesize) { - if (unlikely(!dbx->md_cmp)) { - dbx->md_cmp = get_default_keycmp(db->md_flags); - dbx->md_dcmp = get_default_datacmp(db->md_flags); - } - - dbx->md_klen_min = - (db->md_flags & MDBX_INTEGERKEY) ? 4 /* sizeof(uint32_t) */ : 0; - dbx->md_klen_max = mdbx_limits_keysize_max(pagesize, db->md_flags); - assert(dbx->md_klen_max != (unsigned)-1); - - dbx->md_vlen_min = (db->md_flags & MDBX_INTEGERDUP) - ? 4 /* sizeof(uint32_t) */ - : ((db->md_flags & MDBX_DUPFIXED) ? 1 : 0); - dbx->md_vlen_max = mdbx_limits_valsize_max(pagesize, db->md_flags); - assert(dbx->md_vlen_max != (unsigned)-1); - - if ((db->md_flags & (MDBX_DUPFIXED | MDBX_INTEGERDUP)) != 0 && db->md_xsize) { - if (unlikely(db->md_xsize < dbx->md_vlen_min || - db->md_xsize > dbx->md_vlen_max)) { - mdbx_error("db.md_xsize (%u) <> min/max value-length (%zu/%zu)", - db->md_xsize, dbx->md_vlen_min, dbx->md_vlen_max); - return MDBX_CORRUPTED; - } - dbx->md_vlen_min = dbx->md_vlen_max = db->md_xsize; - } - return MDBX_SUCCESS; -} - -static int mdbx_fetch_sdb(MDBX_txn *txn, MDBX_dbi dbi) { - MDBX_cursor_couple couple; - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) - return MDBX_BAD_DBI; - int rc = mdbx_cursor_init(&couple.outer, txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - MDBX_dbx *const dbx = &txn->mt_dbxs[dbi]; - rc = mdbx_page_search(&couple.outer, &dbx->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(&couple.outer, &dbx->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 */ - - const txnid_t pp_txnid = - pp_txnid4chk(couple.outer.mc_pg[couple.outer.mc_top], txn); - rc = mdbx_node_read(&couple.outer, node, &data, pp_txnid); - 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. */ - MDBX_db *const db = &txn->mt_dbs[dbi]; - if (unlikely((db->md_flags & DB_PERSISTENT_FLAGS) != md_flags)) - return MDBX_INCOMPATIBLE; - - memcpy(db, data.iov_base, sizeof(MDBX_db)); - mdbx_tassert(txn, txn->mt_txnid >= pp_txnid); - if (unlikely(db->md_mod_txnid > pp_txnid)) { - mdbx_error("db.md_mod_txnid (%" PRIaTXN ") > page-txnid (%" PRIaTXN ")", - db->md_mod_txnid, pp_txnid); - return MDBX_CORRUPTED; - } - rc = mdbx_setup_dbx(dbx, db, txn->mt_env->me_psize); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - txn->mt_dbistate[dbi] &= ~DBI_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, - pp_txnid4chk(mp, mc->mc_txn))) != 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, const 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_dbistate & DBI_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, - (/* maybe zero in legacy DB */ mc->mc_db->md_mod_txnid && - !(*mc->mc_dbistate & DBI_DIRTY)) - ? mc->mc_db->md_mod_txnid - : mc->mc_txn->mt_txnid)) != 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, - const txnid_t pp_txnid) { - 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, pp_txnid); - 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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - 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_equal_or_great(MDBX_txn *txn, MDBX_dbi dbi, MDBX_val *key, - MDBX_val *data) { - 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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - 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; - - return mdbx_cursor_get(&cx.outer, key, data, MDBX_SET_LOWERBOUND); -} - -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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - 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] dir SIBLING_LEFT or SIBLING_RIGHT. - * - * Returns 0 on success, non-zero on failure. */ -static int mdbx_cursor_sibling(MDBX_cursor *mc, int dir) { - int rc; - MDBX_node *node; - MDBX_page *mp; - assert(dir == SIBLING_LEFT || dir == SIBLING_RIGHT); - - 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 ((dir == SIBLING_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 aside, moving to next %s sibling", - dir ? "right" : "left"); - if (unlikely((rc = mdbx_cursor_sibling(mc, dir)) != MDBX_SUCCESS)) { - /* undo cursor_pop before returning */ - mc->mc_top++; - mc->mc_snum++; - return rc; - } - } else { - assert((dir - 1) == -1 || (dir - 1) == 1); - mc->mc_ki[mc->mc_top] += (indx_t)(dir - 1); - mdbx_debug("just moving to %s index key %u", - (dir == SIBLING_RIGHT) ? "right" : "left", - mc->mc_ki[mc->mc_top]); - } - mdbx_cassert(mc, IS_BRANCH(mc->mc_pg[mc->mc_top])); - - node = page_node(mp = mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]); - if (unlikely((rc = mdbx_page_get(mc, node_pgno(node), &mp, NULL, - pp_txnid4chk(mp, mc->mc_txn))) != 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; - - mc->mc_ki[mc->mc_top] = - (indx_t)((dir == SIBLING_LEFT) ? page_numkeys(mp) - 1 : 0); - 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; - } - - int ki = mc->mc_ki[mc->mc_top]; - mc->mc_ki[mc->mc_top] = (indx_t)++ki; - const int numkeys = page_numkeys(mp); - if (unlikely(ki >= numkeys)) { - mdbx_debug("%s", "=====> move to next sibling page"); - mc->mc_ki[mc->mc_top] = (indx_t)(numkeys - 1); - if (unlikely((rc = mdbx_cursor_sibling(mc, SIBLING_RIGHT)) != - 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]); - } - -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 (unlikely(!IS_LEAF(mp))) - return MDBX_CORRUPTED; - - 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; - } - - node = page_node(mp, mc->mc_ki[mc->mc_top]); - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } else if (likely(data)) { - if (unlikely((rc = mdbx_node_read(mc, node, data, - pp_txnid4chk(mp, mc->mc_txn))) != - 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); - - int ki = mc->mc_ki[mc->mc_top]; - mc->mc_ki[mc->mc_top] = (indx_t)--ki; - if (unlikely(ki < 0)) { - mc->mc_ki[mc->mc_top] = 0; - mdbx_debug("%s", "=====> move to prev sibling page"); - if ((rc = mdbx_cursor_sibling(mc, SIBLING_LEFT)) != MDBX_SUCCESS) - return rc; - mp = mc->mc_pg[mc->mc_top]; - mdbx_debug("prev page is %" PRIaPGNO ", key index %u", mp->mp_pgno, - 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 (unlikely(!IS_LEAF(mp))) - return MDBX_CORRUPTED; - - 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; - } - - node = page_node(mp, mc->mc_ki[mc->mc_top]); - - if (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } else if (likely(data)) { - if (unlikely((rc = mdbx_node_read(mc, node, data, - pp_txnid4chk(mp, mc->mc_txn))) != - 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 (unlikely(key->iov_len < mc->mc_dbx->md_klen_min || - key->iov_len > mc->mc_dbx->md_klen_max)) { - mdbx_cassert(mc, !"Invalid key-size"); - return MDBX_BAD_VALSIZE; - } - - MDBX_val aligned_key = *key; - uint64_t aligned_keybytes; - if (mc->mc_db->md_flags & MDBX_INTEGERKEY) { - switch (aligned_key.iov_len) { - default: - mdbx_cassert(mc, !"key-size is invalid for MDBX_INTEGERKEY"); - return MDBX_BAD_VALSIZE; - case 4: - if (unlikely(3 & (uintptr_t)aligned_key.iov_base)) - /* copy instead of return error to avoid break compatibility */ - aligned_key.iov_base = - memcpy(&aligned_keybytes, aligned_key.iov_base, 4); - break; - case 8: - if (unlikely(7 & (uintptr_t)aligned_key.iov_base)) - /* copy instead of return error to avoid break compatibility */ - aligned_key.iov_base = - memcpy(&aligned_keybytes, aligned_key.iov_base, 8); - break; - } - } - - 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 (unlikely(!page_numkeys(mp))) { - mc->mc_ki[mc->mc_top] = 0; - mc->mc_flags |= C_EOF; - 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(&aligned_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; - mdbx_cassert(mc, mc->mc_ki[mc->mc_top] < - page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - 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(&aligned_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; - mdbx_cassert(mc, mc->mc_ki[mc->mc_top] < - page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - 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(&aligned_key, &nodekey); - if (rc == 0) { - /* current node was the one we wanted */ - *exactp = 1; - mdbx_cassert(mc, mc->mc_ki[mc->mc_top] < - page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - 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; - mc->mc_flags |= C_EOF; - return MDBX_NOTFOUND; - } - } - if (!mc->mc_top) { - /* There are no other pages */ - mc->mc_ki[mc->mc_top] = 0; - if (op == MDBX_SET_RANGE) { - rc = 0; - goto set1; - } else { - mdbx_cassert(mc, mc->mc_ki[mc->mc_top] < - page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - return MDBX_NOTFOUND; - } - } - } else { - mc->mc_pg[0] = 0; - } - - rc = mdbx_page_search(mc, &aligned_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, &aligned_key, exactp); - if (!*exactp && op != MDBX_SET_RANGE) { - /* MDBX_SET specified and not an exact match. */ - if (unlikely(mc->mc_ki[mc->mc_top] >= page_numkeys(mc->mc_pg[mc->mc_top]))) - mc->mc_flags |= C_EOF; - return MDBX_NOTFOUND; - } - - if (node == NULL) { - mdbx_debug("%s", "===> inexact leaf not found, goto sibling"); - if (unlikely((rc = mdbx_cursor_sibling(mc, SIBLING_RIGHT)) != - 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)); - if (!IS_LEAF2(mp)) - node = page_node(mp, 0); - } - mdbx_cassert(mc, - mc->mc_ki[mc->mc_top] < page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - -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, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if (op == MDBX_SET || op == MDBX_SET_KEY || op == MDBX_SET_RANGE) { - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - } else { - rc = mdbx_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, - MDBX_SET_RANGE, NULL); - } - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } else if (likely(data)) { - if (op == MDBX_GET_BOTH || op == MDBX_GET_BOTH_RANGE) { - if (unlikely(data->iov_len < mc->mc_dbx->md_vlen_min || - data->iov_len > mc->mc_dbx->md_vlen_max)) { - mdbx_cassert(mc, !"Invalid data-size"); - return MDBX_BAD_VALSIZE; - } - MDBX_val aligned_data = *data; - uint64_t aligned_databytes; - if (mc->mc_db->md_flags & MDBX_INTEGERDUP) { - switch (aligned_data.iov_len) { - default: - mdbx_cassert(mc, !"data-size is invalid for MDBX_INTEGERDUP"); - return MDBX_BAD_VALSIZE; - case 4: - if (unlikely(3 & (uintptr_t)aligned_data.iov_base)) - /* copy instead of return error to avoid break compatibility */ - aligned_data.iov_base = - memcpy(&aligned_databytes, aligned_data.iov_base, 4); - break; - case 8: - if (unlikely(7 & (uintptr_t)aligned_data.iov_base)) - /* copy instead of return error to avoid break compatibility */ - aligned_data.iov_base = - memcpy(&aligned_databytes, aligned_data.iov_base, 8); - break; - } - } - MDBX_val olddata; - if (unlikely((rc = mdbx_node_read( - mc, node, &olddata, - pp_txnid4chk(mc->mc_pg[mc->mc_top], mc->mc_txn))) != - MDBX_SUCCESS)) - return rc; - rc = mc->mc_dbx->md_dcmp(&aligned_data, &olddata); - if (rc) { - mdbx_cassert(mc, mc->mc_ki[mc->mc_top] < - page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - if (op != MDBX_GET_BOTH_RANGE || rc > 0) - return MDBX_NOTFOUND; - *exactp = 0; - rc = 0; - } - *data = olddata; - } else if (unlikely((rc = mdbx_node_read(mc, node, data, - pp_txnid4chk(mc->mc_pg[mc->mc_top], - mc->mc_txn))) != - 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; - } - - if (unlikely(!IS_LEAF(mc->mc_pg[mc->mc_top]))) - return MDBX_CORRUPTED; - - 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])) { - if (likely(key)) { - 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 (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node, mc->mc_pg[mc->mc_top]); - 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 (likely(data)) { - if (unlikely((rc = mdbx_node_read( - mc, node, data, - pp_txnid4chk(mc->mc_pg[mc->mc_top], mc->mc_txn))) != - 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 (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { - rc = mdbx_page_search(mc, NULL, MDBX_PS_LAST); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - } - - if (unlikely(!IS_LEAF(mc->mc_pg[mc->mc_top]))) - return MDBX_CORRUPTED; - - 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])) { - if (likely(key)) { - 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 (F_ISSET(node_flags(node), F_DUPDATA)) { - rc = mdbx_xcursor_init1(mc, node, mc->mc_pg[mc->mc_top]); - 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 (likely(data)) { - if (unlikely((rc = mdbx_node_read( - mc, node, data, - pp_txnid4chk(mc->mc_pg[mc->mc_top], mc->mc_txn))) != - 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_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : 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_ENODATA; - 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; - mc->mc_flags |= C_EOF; - 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, mp); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL); - if (unlikely(rc)) - return rc; - } else { - rc = mdbx_cursor_get(&mc->mc_xcursor->mx_cursor, data, NULL, - MDBX_GET_CURRENT); - if (unlikely(rc)) - return rc; - } - } else { - rc = mdbx_node_read(mc, node, data, pp_txnid4chk(mp, mc->mc_txn)); - 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, &exact); - if (mc->mc_flags & C_INITIALIZED) { - mdbx_cassert(mc, mc->mc_snum > 0 && mc->mc_top < mc->mc_snum); - mdbx_cassert(mc, mc->mc_ki[mc->mc_top] < - page_numkeys(mc->mc_pg[mc->mc_top]) || - (mc->mc_flags & C_EOF)); - } - 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 | C_EOF)) != - C_INITIALIZED) - 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, SIBLING_LEFT); - 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]); - mc->mc_flags |= C_EOF; - 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, - pp_txnid4chk(mc->mc_pg[mc->mc_top], mc->mc_txn)); - 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; - case MDBX_SET_LOWERBOUND: { - if (unlikely(key == NULL || data == NULL)) - return MDBX_EINVAL; - MDBX_val save_data = *data; - rc = mdbx_cursor_set(mc, key, data, MDBX_SET_RANGE, &exact); - if (rc == MDBX_SUCCESS && exact && mc->mc_xcursor) { - mc->mc_flags &= ~C_DEL; - if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) { - *data = save_data; - exact = 0; - rc = mdbx_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, - MDBX_SET_RANGE, &exact); - if (rc == MDBX_NOTFOUND) { - mdbx_cassert(mc, !exact); - rc = mdbx_cursor_next(mc, key, data, MDBX_NEXT_NODUP); - } - } else { - int cmp = mc->mc_dbx->md_dcmp(&save_data, data); - exact = (cmp == 0); - if (cmp > 0) - rc = mdbx_cursor_next(mc, key, data, MDBX_NEXT_NODUP); - } - } - if (rc == MDBX_SUCCESS && !exact) - rc = MDBX_RESULT_TRUE; - break; - } - 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_dbistate & (DBI_DIRTY | DBI_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; - *mc->mc_dbistate |= DBI_DIRTY; - mc->mc_txn->mt_flags |= MDBX_TXN_DIRTY; - rc = mdbx_page_search(&cx.outer, &mc->mc_dbx->md_name, MDBX_PS_MODIFY); - if (unlikely(rc)) - return rc; - } - 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; - int rc2; - DKBUF; - - if (unlikely(mc == NULL || key == NULL || data == NULL)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : MDBX_EBADSIGN; - - int rc = check_txn_rw(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi))) - return MDBX_BAD_DBI; - - mdbx_cassert(mc, cursor_is_tracked(mc)); - env = mc->mc_txn->mt_env; - - /* Check this first so counter will always be zero on any early failures. */ - size_t mcount = 0, dcount = 0; - if (unlikely(flags & MDBX_MULTIPLE)) { - if (unlikely(flags & MDBX_RESERVE)) - return MDBX_EINVAL; - if (unlikely(!F_ISSET(mc->mc_db->md_flags, MDBX_DUPFIXED))) - return MDBX_INCOMPATIBLE; - dcount = data[1].iov_len; - if (unlikely(dcount < 2 || data->iov_len == 0)) - return MDBX_BAD_VALSIZE; - if (unlikely(mc->mc_db->md_xsize != data->iov_len) && mc->mc_db->md_xsize) - return MDBX_BAD_VALSIZE; - if (unlikely(dcount > - MAX_MAPSIZE / 2 / (BRANCH_NODEMAX(MAX_PAGESIZE) - NODESIZE))) { - /* checking for multiplication overflow */ - if (unlikely(dcount > MAX_MAPSIZE / 2 / data->iov_len)) - return MDBX_TOO_LARGE; - } - data[1].iov_len = 0 /* reset done item counter */; - } - - if (flags & MDBX_RESERVE) { - if (unlikely(mc->mc_db->md_flags & (MDBX_DUPSORT | MDBX_REVERSEDUP | - MDBX_INTEGERDUP | MDBX_DUPFIXED))) - return MDBX_INCOMPATIBLE; - data->iov_base = nullptr; - } - - const unsigned nospill = flags & MDBX_NOSPILL; - flags -= nospill; - - if (unlikely(mc->mc_txn->mt_flags & (MDBX_TXN_RDONLY | MDBX_TXN_BLOCKED))) - return (mc->mc_txn->mt_flags & MDBX_TXN_RDONLY) ? MDBX_EACCESS - : MDBX_BAD_TXN; - - uint64_t aligned_keybytes, aligned_databytes; - MDBX_val aligned_key, aligned_data; - if (likely((mc->mc_flags & C_SUB) == 0)) { - if (unlikely(key->iov_len < mc->mc_dbx->md_klen_min || - key->iov_len > mc->mc_dbx->md_klen_max)) { - mdbx_cassert(mc, !"Invalid key-size"); - return MDBX_BAD_VALSIZE; - } - if (unlikely(data->iov_len < mc->mc_dbx->md_vlen_min || - data->iov_len > mc->mc_dbx->md_vlen_max)) { - mdbx_cassert(mc, !"Invalid data-size"); - return MDBX_BAD_VALSIZE; - } - - if (mc->mc_db->md_flags & MDBX_INTEGERKEY) { - switch (key->iov_len) { - default: - mdbx_cassert(mc, !"key-size is invalid for MDBX_INTEGERKEY"); - return MDBX_BAD_VALSIZE; - case 4: - if (unlikely(3 & (uintptr_t)key->iov_base)) { - /* copy instead of return error to avoid break compatibility */ - aligned_key.iov_base = - memcpy(&aligned_keybytes, key->iov_base, aligned_key.iov_len = 4); - key = &aligned_key; - } - break; - case 8: - if (unlikely(7 & (uintptr_t)key->iov_base)) { - /* copy instead of return error to avoid break compatibility */ - aligned_key.iov_base = - memcpy(&aligned_keybytes, key->iov_base, aligned_key.iov_len = 8); - key = &aligned_key; - } - break; - } - } - if (mc->mc_db->md_flags & MDBX_INTEGERDUP) { - switch (data->iov_len) { - default: - mdbx_cassert(mc, !"data-size is invalid for MDBX_INTEGERKEY"); - return MDBX_BAD_VALSIZE; - case 4: - if (unlikely(3 & (uintptr_t)data->iov_base)) { - if (unlikely(flags & MDBX_MULTIPLE)) - return MDBX_BAD_VALSIZE; - /* copy instead of return error to avoid break compatibility */ - aligned_data.iov_base = memcpy(&aligned_databytes, data->iov_base, - aligned_data.iov_len = 4); - data = &aligned_data; - } - break; - case 8: - if (unlikely(7 & (uintptr_t)data->iov_base)) { - if (unlikely(flags & MDBX_MULTIPLE)) - return MDBX_BAD_VALSIZE; - /* copy instead of return error to avoid break compatibility */ - aligned_data.iov_base = memcpy(&aligned_databytes, data->iov_base, - aligned_data.iov_len = 8); - data = &aligned_data; - } - break; - } - } - } - - 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) { - if (unlikely(flags & (MDBX_APPEND | MDBX_NOOVERWRITE))) - return MDBX_EINVAL; - /* 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 (unlikely((flags & MDBX_MULTIPLE))) - goto drop_current; - - 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 обновления требуется удаление и - * последующая вставка. */ - if (mc->mc_xcursor->mx_db.md_entries > 1 || - current_data.iov_len != data->iov_len) { - drop_current: - rc = mdbx_cursor_del(mc, flags & MDBX_ALLDUPS); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - flags -= MDBX_CURRENT; - goto skip_check_samedata; - } - } else if (unlikely(node_size(key, data) > - /* See note inside leaf_size() */ - env->me_branch_nodemax)) { - rc = mdbx_cursor_del(mc, 0); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - flags -= MDBX_CURRENT; - goto skip_check_samedata; - } - } - if (!(flags & MDBX_RESERVE) && - unlikely(cmp_lenfast(¤t_data, data) == 0)) - return MDBX_SUCCESS /* the same data, nothing to update */; - skip_check_samedata:; - } - - 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 = false; - if ((flags & MDBX_APPEND) && mc->mc_db->md_entries > 0) { - rc = mdbx_cursor_last(mc, &dkey, &olddata); - if (likely(rc == MDBX_SUCCESS)) { - rc = mc->mc_dbx->md_cmp(key, &dkey); - if (likely(rc > 0)) { - mc->mc_ki[mc->mc_top]++; /* step forward for appending */ - rc = MDBX_NOTFOUND; - } else { - if (unlikely(rc != MDBX_SUCCESS || !(flags & MDBX_APPENDDUP))) - /* new-key < last-key - * or new-key == last-key without MDBX_APPENDDUP */ - return MDBX_EKEYMISMATCH; - exact = true; - } - } - } else { - rc = mdbx_cursor_set(mc, (MDBX_val *)key, &olddata, MDBX_SET, &exact); - } - if (likely(rc == MDBX_SUCCESS)) { - if (exact) { - if (unlikely(flags & MDBX_NOOVERWRITE)) { - mdbx_debug("duplicate key [%s]", DKEY(key)); - *data = olddata; - return MDBX_KEYEXIST; - } - if (unlikely(mc->mc_flags & C_SUB)) { - /* nested subtree of DUPSORT-database with the same key, - * nothing to update */ - mdbx_assert(env, data->iov_len == 0 && olddata.iov_len == 0); - return MDBX_SUCCESS; - } - if (unlikely(flags & MDBX_ALLDUPS) && mc->mc_xcursor && - (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) { - rc = mdbx_cursor_del(mc, MDBX_ALLDUPS); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - flags -= MDBX_ALLDUPS; - rc = MDBX_NOTFOUND; - exact = false; - } else /* checking for early exit without dirtying pages */ - if (!(flags & (MDBX_RESERVE | MDBX_MULTIPLE)) && - unlikely(mc->mc_dbx->md_dcmp(data, &olddata) == 0)) { - if (!mc->mc_xcursor) - /* the same data, nothing to update */ - return MDBX_SUCCESS; - if (flags & MDBX_NODUPDATA) - return MDBX_KEYEXIST; - if (flags & MDBX_APPENDDUP) - return MDBX_EKEYMISMATCH; - if (likely(unsure_equal(mc->mc_dbx->md_dcmp, data, &olddata))) - /* data is match exactly byte-to-byte, nothing to update */ - return MDBX_SUCCESS; - else { - /* The data has differences, but the user-provided comparator - * considers them equal. So continue update since called without. - * Continue to update since was called without MDBX_NODUPDATA. */ - } - } - } - } else if (unlikely(rc != MDBX_NOTFOUND)) - return rc; - } - - mc->mc_flags &= ~C_DEL; - - /* Cursor is positioned, check for room in the dirty list */ - if (!nospill) { - if (unlikely(flags & MDBX_MULTIPLE)) { - rdata = &xdata; - xdata.iov_len = data->iov_len * dcount; - } else { - rdata = data; - } - if (unlikely(rc2 = mdbx_cursor_spill(mc, key, rdata))) - return rc2; - } - - if (unlikely(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++; - if (mc->mc_db->md_flags & MDBX_INTEGERKEY) { - assert(key->iov_len >= mc->mc_dbx->md_klen_min && - key->iov_len <= mc->mc_dbx->md_klen_max); - mc->mc_dbx->md_klen_min = mc->mc_dbx->md_klen_max = key->iov_len; - } - if (mc->mc_db->md_flags & (MDBX_INTEGERDUP | MDBX_DUPFIXED)) { - assert(data->iov_len >= mc->mc_dbx->md_vlen_min && - data->iov_len <= mc->mc_dbx->md_vlen_max); - assert(mc->mc_xcursor != NULL); - mc->mc_db->md_xsize = mc->mc_xcursor->mx_db.md_xsize = - (unsigned)(mc->mc_dbx->md_vlen_min = mc->mc_dbx->md_vlen_max = - mc->mc_xcursor->mx_dbx.md_klen_min = - mc->mc_xcursor->mx_dbx.md_klen_max = - data->iov_len); - } - 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 = pp_txnid2chk(mc->mc_txn); - 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 = - (mc->mc_db->md_flags & MDBX_DUPFIXED) ? (uint16_t)data->iov_len : 0; - 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, 0); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - return MDBX_SUCCESS; - } - - more:; - if (mdbx_audit_enabled()) { - int err = mdbx_cursor_check(mc, 0); - 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, - pp_txnid4chk(mc->mc_pg[mc->mc_top], mc->mc_txn))) != 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, 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; - mdbx_cassert(mc, mdbx_dirtylist_check(mc->mc_txn)); - } - 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, 0); - 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)) { - - /* does data match? */ - const int cmp = mc->mc_dbx->md_dcmp(data, &olddata); - if ((flags & MDBX_APPENDDUP) && unlikely(cmp <= 0)) - return MDBX_EKEYMISMATCH; - if (cmp == 0) { - if (flags & MDBX_NODUPDATA) - return MDBX_KEYEXIST; - if (likely(unsure_equal(mc->mc_dbx->md_dcmp, data, &olddata))) { - /* data is match exactly byte-to-byte, nothing to update */ - if (unlikely(flags & MDBX_MULTIPLE)) { - rc = MDBX_SUCCESS; - goto continue_multiple; - } - return MDBX_SUCCESS; - } else { - /* The data has differences, but the user-provided comparator - * considers them equal. So continue update since called without. - * Continue to update since was called without MDBX_NODUPDATA. */ - } - mdbx_cassert( - mc, - node_size(key, data) <= - /* See note inside leaf_size() */ env->me_branch_nodemax); - goto current; - } - - /* 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; - } - - /* 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 = flags_db2sub(mc->mc_db->md_flags); - if (mc->mc_db->md_flags & MDBX_DUPFIXED) { - fp_flags |= P_LEAF2; - nested_dupdb.md_xsize = fp->mp_leaf2_ksize; - } - 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 = 0; - nested_dupdb.md_mod_txnid = pp_txnid2chk(mc->mc_txn); - 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, 0); - if (unlikely(err != MDBX_SUCCESS)) - return err; - } - return MDBX_SUCCESS; - } - } - mdbx_node_del(mc, 0); - } - - rdata = data; - -new_sub:; - unsigned nflags = flags & NODE_ADD_FLAGS; - size_t 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, 0); - } 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 */ - const MDBX_dbi dbi = mc->mc_dbi; - const unsigned i = mc->mc_top; - MDBX_page *const mp = mc->mc_pg[i]; - for (MDBX_cursor *m2 = mc->mc_txn->tw.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_snum < mc->mc_snum || m3->mc_pg[i] != mp) - continue; - if (m3->mc_ki[i] >= mc->mc_ki[i]) - m3->mc_ki[i] += insert_key; - 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]); -#define SHIFT_MDBX_NODUPDATA_TO_MDBX_NOOVERWRITE 1 - STATIC_ASSERT( - (MDBX_NODUPDATA >> SHIFT_MDBX_NODUPDATA_TO_MDBX_NOOVERWRITE) == - MDBX_NOOVERWRITE); - xflags = MDBX_CURRENT | MDBX_NOSPILL | - ((flags & MDBX_NODUPDATA) >> - SHIFT_MDBX_NODUPDATA_TO_MDBX_NOOVERWRITE); - if ((flags & MDBX_CURRENT) == 0) { - xflags -= MDBX_CURRENT; - rc2 = mdbx_xcursor_init1(mc, node, mc->mc_pg[mc->mc_top]); - if (unlikely(rc2 != MDBX_SUCCESS)) - return rc2; - } - 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->tw.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; -#define SHIFT_MDBX_APPENDDUP_TO_MDBX_APPEND 1 - STATIC_ASSERT((MDBX_APPENDDUP >> SHIFT_MDBX_APPENDDUP_TO_MDBX_APPEND) == - MDBX_APPEND); - xflags |= (flags & MDBX_APPENDDUP) >> SHIFT_MDBX_APPENDDUP_TO_MDBX_APPEND; - rc = mdbx_cursor_put(&mc->mc_xcursor->mx_cursor, data, &xdata, xflags); - if (flags & F_SUBDATA) { - void *db = node_data(node); - mc->mc_xcursor->mx_db.md_mod_txnid = pp_txnid2chk(mc->mc_txn); - 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) { - continue_multiple: - 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, 0); - 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, MDBX_put_flags_t flags) { - if (unlikely(!mc)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : MDBX_EBADSIGN; - - int rc = check_txn_rw(mc->mc_txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi))) - return MDBX_BAD_DBI; - - if (unlikely(!(mc->mc_flags & C_INITIALIZED))) - return MDBX_ENODATA; - - 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_cursor_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 (unlikely(!IS_LEAF(mp))) - return MDBX_CORRUPTED; - 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_ALLDUPS | /* for compatibility */ 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); - mc->mc_xcursor->mx_db.md_mod_txnid = pp_txnid2chk(mc->mc_txn); - 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->tw.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)) - return MDBX_INCOMPATIBLE; - - /* 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, - pp_txnid4chk(mp, mc->mc_txn))) || - (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("db %u allocated new page %" PRIaPGNO ", num %u", mc->mc_dbi, - np->mp_pgno, num); - 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_dbistate |= DBI_DIRTY; - mc->mc_txn->mt_flags |= MDBX_TXN_DIRTY; - 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; - 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_ensure(mc->mc_txn->mt_env, - !F_ISSET(mc->mc_db->md_flags, MDBX_DUPSORT)); - if (unlikely(flags & (F_DUPDATA | F_SUBDATA))) - return MDBX_PROBLEM; - 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 && - data->iov_len /* to avoid UBSAN traps*/ != 0)) - 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 && - data->iov_len /* to avoid UBSAN traps*/ != 0)) - 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; - -#if MDBX_DEBUG > 0 - if (mdbx_audit_enabled()) { - int page_check_err = mdbx_page_check(mc, mp, C_UPDATING); - mdbx_cassert(mc, page_check_err == MDBX_SUCCESS); - } -#endif -} - -/* 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 <lower nodes...initial part of subpage> 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)) { - mdbx_error("unexpected dupsort-page for non-dupsort db/cursor (dbi %u)", - mc->mc_dbi); - 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_dbistate = &mx->mx_dbistate; - mx->mx_cursor.mc_snum = 0; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = C_SUB | (mc->mc_flags & (C_COPYING | C_SKIPORD)); - 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; - mx->mx_dbx.md_klen_min = INT_MAX; - mx->mx_dbx.md_vlen_min = mx->mx_dbx.md_klen_max = mx->mx_dbx.md_vlen_max = 0; - 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, - const MDBX_page *mp) { - MDBX_xcursor *mx = mc->mc_xcursor; - if (unlikely(mx == nullptr)) { - mdbx_error("unexpected dupsort-page for non-dupsort db/cursor (dbi %u)", - mc->mc_dbi); - return MDBX_CORRUPTED; - } - - const uint8_t flags = node_flags(node); - switch (flags) { - default: - mdbx_error("invalid node flags %u", flags); - return MDBX_CORRUPTED; - case F_DUPDATA | F_SUBDATA: - if (unlikely(node_ds(node) != sizeof(MDBX_db))) { - mdbx_error("invalid nested-db record size %zu", node_ds(node)); - return MDBX_CORRUPTED; - } - memcpy(&mx->mx_db, node_data(node), sizeof(MDBX_db)); - const txnid_t pp_txnid = IS_DIRTY(mp) ? mc->mc_txn->mt_txnid : mp->mp_txnid; - if (unlikely(mx->mx_db.md_mod_txnid > pp_txnid)) { - mdbx_error("nested-db.md_mod_txnid (%" PRIaTXN ") > page-txnid (%" PRIaTXN - ")", - mx->mx_db.md_mod_txnid, pp_txnid); - return MDBX_CORRUPTED; - } - 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 | (mc->mc_flags & (C_COPYING | C_SKIPORD)); - break; - case F_DUPDATA: - if (unlikely(node_ds(node) <= PAGEHDRSZ)) { - mdbx_error("invalid nested-page size %zu", node_ds(node)); - return MDBX_CORRUPTED; - } - MDBX_page *fp = node_data(node); - 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_db.md_mod_txnid = mp->mp_txnid; - mx->mx_cursor.mc_snum = 1; - mx->mx_cursor.mc_top = 0; - mx->mx_cursor.mc_flags = - C_INITIALIZED | C_SUB | (mc->mc_flags & (C_COPYING | C_SKIPORD)); - mx->mx_cursor.mc_pg[0] = fp; - mx->mx_cursor.mc_ki[0] = 0; - mx->mx_db.md_flags = flags_db2sub(mc->mc_db->md_flags); - mx->mx_db.md_xsize = - (mc->mc_db->md_flags & MDBX_DUPFIXED) ? fp->mp_leaf2_ksize : 0; - break; - } - - if (unlikely(mx->mx_db.md_xsize != mc->mc_db->md_xsize)) { - if (unlikely(mc->mc_db->md_xsize != 0)) { - mdbx_error("cursor mismatched nested-db md_xsize %u", - mc->mc_db->md_xsize); - return MDBX_CORRUPTED; - } - if (unlikely((mc->mc_db->md_flags & MDBX_DUPFIXED) == 0)) { - mdbx_error("mismatched nested-db md_flags %u", mc->mc_db->md_flags); - return MDBX_CORRUPTED; - } - if (unlikely(mx->mx_db.md_xsize < mc->mc_dbx->md_vlen_min || - mx->mx_db.md_xsize > mc->mc_dbx->md_vlen_max)) { - mdbx_error("mismatched nested-db.md_xsize (%u) <> min/max value-length " - "(%zu/%zu)", - mx->mx_db.md_xsize, mc->mc_dbx->md_vlen_min, - mc->mc_dbx->md_vlen_max); - return MDBX_CORRUPTED; - } - mc->mc_db->md_xsize = mx->mx_db.md_xsize; - mc->mc_dbx->md_vlen_min = mc->mc_dbx->md_vlen_max = mx->mx_db.md_xsize; - } - mx->mx_dbx.md_klen_min = mc->mc_dbx->md_vlen_min; - mx->mx_dbx.md_klen_max = mc->mc_dbx->md_vlen_max; - - mdbx_debug("Sub-db -%u root page %" PRIaPGNO, mx->mx_cursor.mc_dbi, - mx->mx_db.md_root); - mx->mx_dbistate = DBI_VALID | DBI_USRVALID | DBI_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, - bool new_dupdata) { - MDBX_xcursor *mx = mc->mc_xcursor; - if (unlikely(mx == nullptr)) { - mdbx_error("unexpected dupsort-page for non-dupsort db/cursor (dbi %u)", - mc->mc_dbi); - 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_dbistate = DBI_VALID | DBI_USRVALID | DBI_DUPDATA; - } - - mx->mx_dbx.md_klen_min = src_mx->mx_dbx.md_klen_min; - mx->mx_dbx.md_klen_max = src_mx->mx_dbx.md_klen_max; - mx->mx_dbx.md_cmp = src_mx->mx_dbx.md_cmp; - mx->mx_db = src_mx->mx_db; - mx->mx_cursor.mc_pg[0] = src_mx->mx_cursor.mc_pg[0]; - if (mx->mx_cursor.mc_flags & C_INITIALIZED) { - mdbx_debug("Sub-db -%u root page %" PRIaPGNO, mx->mx_cursor.mc_dbi, - mx->mx_db.md_root); - } - return MDBX_SUCCESS; -} - -static __inline int mdbx_couple_init(MDBX_cursor_couple *couple, - const MDBX_dbi dbi, MDBX_txn *const txn, - MDBX_db *const db, MDBX_dbx *const dbx, - uint8_t *const dbstate) { - couple->outer.mc_signature = MDBX_MC_LIVE; - couple->outer.mc_next = NULL; - couple->outer.mc_backup = NULL; - couple->outer.mc_dbi = dbi; - couple->outer.mc_txn = txn; - couple->outer.mc_db = db; - couple->outer.mc_dbx = dbx; - couple->outer.mc_dbistate = dbstate; - couple->outer.mc_snum = 0; - couple->outer.mc_top = 0; - couple->outer.mc_pg[0] = 0; - couple->outer.mc_flags = 0; - couple->outer.mc_ki[0] = 0; - couple->outer.mc_xcursor = NULL; - - int rc = MDBX_SUCCESS; - if (unlikely(*couple->outer.mc_dbistate & DBI_STALE)) { - rc = mdbx_page_search(&couple->outer, NULL, MDBX_PS_ROOTONLY); - rc = (rc != MDBX_NOTFOUND) ? rc : MDBX_SUCCESS; - } else if (unlikely(couple->outer.mc_dbx->md_klen_max == 0)) { - rc = mdbx_setup_dbx(couple->outer.mc_dbx, couple->outer.mc_db, - txn->mt_env->me_psize); - } - - if (couple->outer.mc_db->md_flags & MDBX_DUPSORT) { - couple->inner.mx_cursor.mc_signature = MDBX_MC_LIVE; - couple->outer.mc_xcursor = &couple->inner; - rc = mdbx_xcursor_init0(&couple->outer); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - couple->inner.mx_dbx.md_klen_min = couple->outer.mc_dbx->md_vlen_min; - couple->inner.mx_dbx.md_klen_max = couple->outer.mc_dbx->md_vlen_max; - } - return rc; -} - -/* Initialize a cursor for a given transaction and database. */ -static int mdbx_cursor_init(MDBX_cursor *mc, MDBX_txn *txn, MDBX_dbi dbi) { - STATIC_ASSERT(offsetof(MDBX_cursor_couple, outer) == 0); - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) - return MDBX_BAD_DBI; - - return mdbx_couple_init(container_of(mc, MDBX_cursor_couple, outer), dbi, txn, - &txn->mt_dbs[dbi], &txn->mt_dbxs[dbi], - &txn->mt_dbistate[dbi]); -} - -MDBX_cursor *mdbx_cursor_create(void *context) { - MDBX_cursor_couple *couple = mdbx_calloc(1, sizeof(MDBX_cursor_couple)); - if (unlikely(!couple)) - return nullptr; - - couple->outer.mc_signature = MDBX_MC_READY4CLOSE; - couple->outer.mc_dbi = UINT_MAX; - couple->mc_userctx = context; - return &couple->outer; -} - -int mdbx_cursor_set_userctx(MDBX_cursor *mc, void *ctx) { - if (unlikely(!mc)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_READY4CLOSE && - mc->mc_signature != MDBX_MC_LIVE)) - return MDBX_EBADSIGN; - - MDBX_cursor_couple *couple = container_of(mc, MDBX_cursor_couple, outer); - couple->mc_userctx = ctx; - return MDBX_SUCCESS; -} - -void *mdbx_cursor_get_userctx(const MDBX_cursor *mc) { - if (unlikely(!mc)) - return nullptr; - - if (unlikely(mc->mc_signature != MDBX_MC_READY4CLOSE && - mc->mc_signature != MDBX_MC_LIVE)) - return nullptr; - - MDBX_cursor_couple *couple = container_of(mc, MDBX_cursor_couple, outer); - return couple->mc_userctx; -} - -int mdbx_cursor_bind(MDBX_txn *txn, MDBX_cursor *mc, MDBX_dbi dbi) { - if (unlikely(!mc)) - return MDBX_EINVAL; - - if (unlikely(mc->mc_signature != MDBX_MC_READY4CLOSE && - mc->mc_signature != MDBX_MC_LIVE)) - return MDBX_EBADSIGN; - - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DBI_VALID))) - return MDBX_BAD_DBI; - - if (unlikely(dbi == FREE_DBI && !F_ISSET(txn->mt_flags, MDBX_TXN_RDONLY))) - return MDBX_EACCESS; - - if (unlikely(mc->mc_backup)) /* Cursor from parent transaction */ { - mdbx_cassert(mc, mc->mc_signature == MDBX_MC_LIVE); - if (unlikely(mc->mc_dbi != dbi || - /* paranoia */ mc->mc_signature != MDBX_MC_LIVE || - mc->mc_txn != txn)) - return MDBX_EINVAL; - - assert(mc->mc_db == &txn->mt_dbs[dbi]); - assert(mc->mc_dbx == &txn->mt_dbxs[dbi]); - assert(mc->mc_dbi == dbi); - assert(mc->mc_dbistate == &txn->mt_dbistate[dbi]); - return likely(mc->mc_dbi == dbi && - /* paranoia */ mc->mc_signature == MDBX_MC_LIVE && - mc->mc_txn == txn) - ? MDBX_SUCCESS - : MDBX_EINVAL /* Disallow change DBI in nested transactions */; - } - - if (mc->mc_signature == MDBX_MC_LIVE) { - if (unlikely(!mc->mc_txn || mc->mc_txn->mt_signature != MDBX_MT_SIGNATURE)) - return MDBX_PROBLEM; - if (mc->mc_flags & C_UNTRACK) { - mdbx_cassert(mc, !(mc->mc_txn->mt_flags & MDBX_TXN_RDONLY)); - MDBX_cursor **prev = &mc->mc_txn->tw.cursors[mc->mc_dbi]; - while (*prev && *prev != mc) - prev = &(*prev)->mc_next; - mdbx_cassert(mc, *prev == mc); - *prev = mc->mc_next; - } - mc->mc_signature = MDBX_MC_READY4CLOSE; - mc->mc_flags = 0; - mc->mc_dbi = UINT_MAX; - mc->mc_next = NULL; - mc->mc_db = NULL; - mc->mc_dbx = NULL; - mc->mc_dbistate = NULL; - } - mdbx_cassert(mc, !(mc->mc_flags & C_UNTRACK)); - - rc = mdbx_cursor_init(mc, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (!(txn->mt_flags & MDBX_TXN_RDONLY)) { - mc->mc_next = txn->tw.cursors[dbi]; - txn->tw.cursors[dbi] = mc; - mc->mc_flags |= C_UNTRACK; - } - - return MDBX_SUCCESS; -} - -int mdbx_cursor_open(MDBX_txn *txn, MDBX_dbi dbi, MDBX_cursor **ret) { - if (unlikely(!ret)) - return MDBX_EINVAL; - *ret = NULL; - - MDBX_cursor *const mc = mdbx_cursor_create(nullptr); - if (unlikely(!mc)) - return MDBX_ENOMEM; - - int rc = mdbx_cursor_bind(txn, mc, dbi); - if (unlikely(rc != MDBX_SUCCESS)) { - mdbx_cursor_close(mc); - return rc; - } - - *ret = mc; - return MDBX_SUCCESS; -} - -int mdbx_cursor_renew(MDBX_txn *txn, MDBX_cursor *mc) { - return likely(mc) ? mdbx_cursor_bind(txn, mc, mc->mc_dbi) : MDBX_EINVAL; -} - -int mdbx_cursor_copy(const MDBX_cursor *src, MDBX_cursor *dest) { - if (unlikely(!src)) - return MDBX_EINVAL; - if (unlikely(src->mc_signature != MDBX_MC_LIVE)) - return (src->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : MDBX_EBADSIGN; - - int rc = mdbx_cursor_bind(src->mc_txn, dest, src->mc_dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - assert(dest->mc_db == src->mc_db); - assert(dest->mc_dbi == src->mc_dbi); - assert(dest->mc_dbx == src->mc_dbx); - assert(dest->mc_dbistate == src->mc_dbistate); -again: - assert(dest->mc_txn == src->mc_txn); - dest->mc_flags ^= (dest->mc_flags ^ src->mc_flags) & ~C_UNTRACK; - dest->mc_top = src->mc_top; - dest->mc_snum = src->mc_snum; - for (unsigned i = 0; i < src->mc_snum; ++i) { - dest->mc_ki[i] = src->mc_ki[i]; - dest->mc_pg[i] = src->mc_pg[i]; - } - - if (src->mc_xcursor) { - dest->mc_xcursor->mx_db = src->mc_xcursor->mx_db; - dest->mc_xcursor->mx_dbx = src->mc_xcursor->mx_dbx; - src = &src->mc_xcursor->mx_cursor; - dest = &dest->mc_xcursor->mx_cursor; - goto again; - } - - return MDBX_SUCCESS; -} - -void mdbx_cursor_close(MDBX_cursor *mc) { - if (likely(mc)) { - mdbx_ensure(NULL, mc->mc_signature == MDBX_MC_LIVE || - mc->mc_signature == MDBX_MC_READY4CLOSE); - MDBX_txn *const txn = mc->mc_txn; - if (!mc->mc_backup) { - mc->mc_txn = NULL; - /* 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) { - mdbx_ensure(txn->mt_env, check_txn_rw(txn, 0) == MDBX_SUCCESS); - MDBX_cursor **prev = &txn->tw.cursors[mc->mc_dbi]; - while (*prev && *prev != mc) - prev = &(*prev)->mc_next; - mdbx_tassert(txn, *prev == mc); - *prev = mc->mc_next; - } - mc->mc_signature = 0; - mc->mc_next = mc; - mdbx_free(mc); - } else { - /* Cursor closed before nested txn ends */ - mdbx_tassert(txn, mc->mc_signature == MDBX_MC_LIVE); - mdbx_ensure(txn->mt_env, check_txn_rw(txn, 0) == MDBX_SUCCESS); - mc->mc_signature = MDBX_MC_WAIT4EOT; - } - } -} - -MDBX_txn *mdbx_cursor_txn(const MDBX_cursor *mc) { - if (unlikely(!mc || mc->mc_signature != MDBX_MC_LIVE)) - 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_LIVE)) - return UINT_MAX; - return 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_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : 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; -} - -/* 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; - - mdbx_cassert(mc, cursor_is_tracked(mc)); - 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 (offset %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, C_UPDATING); - 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); - - if (likely(key->iov_len /* to avoid UBSAN traps*/ != 0)) - 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 unsigned 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 unsigned snum = cdst->mc_snum; - mdbx_cassert(csrc, snum > 0); - MDBX_cursor mn; - cursor_copy_internal(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]; - - WITH_CURSOR_TRACKING(mn, 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->tw.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->tw.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; - cursor_copy_internal(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; - cursor_copy_internal(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); - mdbx_cassert(csrc, cursor_is_tracked(csrc)); - mdbx_cassert(cdst, cursor_is_tracked(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; - cursor_copy_internal(csrc, &mn); - mn.mc_xcursor = NULL; - /* must find the lowest key below src */ - rc = mdbx_page_search_lowest(&mn); - if (unlikely(rc)) - return rc; - - const MDBX_page *mp = mn.mc_pg[mn.mc_top]; - if (likely(!IS_LEAF2(mp))) { - mdbx_cassert(&mn, IS_LEAF(mp)); - const MDBX_node *lowest = page_node(mp, 0); - key.iov_len = node_ks(lowest); - key.iov_base = node_key(lowest); - } else { - mdbx_cassert(&mn, mn.mc_top > csrc->mc_top); - key.iov_len = mp->mp_leaf2_ksize; - key.iov_base = page_leaf2key(mp, mn.mc_ki[mn.mc_top], key.iov_len); - } - mdbx_cassert(&mn, key.iov_len >= csrc->mc_dbx->md_klen_min); - mdbx_cassert(&mn, key.iov_len <= csrc->mc_dbx->md_klen_max); - - 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->tw.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 unsigned 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 cursor_copy_internal(const MDBX_cursor *csrc, MDBX_cursor *cdst) { - mdbx_cassert(csrc, - csrc->mc_txn->mt_txnid >= csrc->mc_txn->mt_env->me_oldest->weak); - 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; - cdst->mc_dbistate = csrc->mc_dbistate; - - 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) { - mdbx_cassert(mc, cursor_is_tracked(mc)); - 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]); - - STATIC_ASSERT(P_BRANCH == 1); - const unsigned minkeys = (pagetype & P_BRANCH) + 1; - - /* The threshold of minimum page fill factor, in form of a negative binary - * exponent, i.e. X = 2 means 1/(2**X) == 1/(2**2) == 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 room_threshold = - page_space(mc->mc_txn->mt_env) - - (page_space(mc->mc_txn->mt_env) >> threshold_fill_exp2); - - const MDBX_page *const tp = mc->mc_pg[mc->mc_top]; - mdbx_debug("rebalancing %s page %" PRIaPGNO " (has %u keys, %.1f%% full)", - (pagetype & P_LEAF) ? "leaf" : "branch", tp->mp_pgno, - page_numkeys(tp), page_fill(mc->mc_txn->mt_env, tp)); - - if (unlikely(page_numkeys(tp) < minkeys)) { - mdbx_debug("page %" PRIaPGNO " must be merged due keys < %u threshold", - tp->mp_pgno, minkeys); - } else if (unlikely(page_room(tp) > room_threshold)) { - mdbx_debug("page %" PRIaPGNO " should be merged due room %u > %u threshold", - tp->mp_pgno, page_room(tp), room_threshold); - } else { - mdbx_debug("no need to rebalance page %" PRIaPGNO - ", room %u < %u threshold", - tp->mp_pgno, page_room(tp), room_threshold); - mdbx_cassert(mc, mc->mc_db->md_entries > 0); - return MDBX_SUCCESS; - } - - int rc; - 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 */ - for (MDBX_cursor *m2 = mc->mc_txn->tw.cursors[mc->mc_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, - pp_txnid4chk(mp, mc->mc_txn)); - 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 */ - for (MDBX_cursor *m2 = mc->mc_txn->tw.cursors[mc->mc_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) { - 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; - cursor_copy_internal(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, pp_txnid4chk(mn.mc_pg[pre_top], mc->mc_txn)); - 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, pp_txnid4chk(mn.mc_pg[pre_top], mc->mc_txn)); - 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) > room_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)) { - cursor_copy_internal(&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) > room_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; - WITH_CURSOR_TRACKING(mn, 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; - WITH_CURSOR_TRACKING(mn, 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; - WITH_CURSOR_TRACKING(mn, 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) { -#if MDBX_DEBUG > 0 - if (mdbx_audit_enabled()) - return mdbx_cursor_check(mc, C_UPDATING); -#endif - 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)) { - cursor_copy_internal(&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 (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; - WITH_CURSOR_TRACKING(mn, 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_cursor *const mc, - const MDBX_page *const mp, unsigned options) { - options |= mc->mc_flags & (C_COPYING | C_UPDATING | C_RETIRING | C_SKIPORD); - MDBX_env *const env = mc->mc_txn->mt_env; - const unsigned nkeys = page_numkeys(mp); - char *const end_of_page = (char *)mp + env->me_psize; - if (unlikely(mp->mp_pgno < MIN_PAGENO || mp->mp_pgno > MAX_PAGENO)) - return bad_page(mp, "invalid pgno (%u)\n", mp->mp_pgno); - if (IS_OVERFLOW(mp)) { - if (unlikely(mp->mp_pages < 1 && mp->mp_pages >= MAX_PAGENO / 2)) - return bad_page(mp, "invalid overflow n-pages (%u)\n", mp->mp_pages); - if (unlikely(mp->mp_pgno + mp->mp_pages > mc->mc_txn->mt_next_pgno)) - return bad_page(mp, "overflow page beyond (%u) next-pgno\n", - mp->mp_pgno + mp->mp_pages); - return MDBX_SUCCESS; - } - - int rc = MDBX_SUCCESS; - if ((options & C_UPDATING) == 0 || !IS_DIRTY(mp)) { - if (unlikely(nkeys < 2 && IS_BRANCH(mp))) - rc = bad_page(mp, "branch-page nkey (%u) < 2\n", nkeys); - } - - MDBX_val here, prev = {0, 0}; - for (unsigned i = 0; i < nkeys; ++i) { - if (IS_LEAF2(mp)) { - const size_t ksize = mp->mp_leaf2_ksize; - char *const key = page_leaf2key(mp, i, ksize); - if (unlikely(end_of_page < key + ksize)) { - rc = bad_page(mp, "leaf2-key beyond (%zu) page-end\n", - key + ksize - end_of_page); - continue; - } - - if ((options & C_COPYING) == 0) { - if (unlikely(ksize != mc->mc_dbx->md_klen_min)) { - if (unlikely(ksize < mc->mc_dbx->md_klen_min || - ksize > mc->mc_dbx->md_klen_max)) - rc = bad_page( - mp, "leaf2-key size (%zu) <> min/max key-length (%zu/%zu)\n", - ksize, mc->mc_dbx->md_klen_min, mc->mc_dbx->md_klen_max); - else - mc->mc_dbx->md_klen_min = mc->mc_dbx->md_klen_max = ksize; - } - if ((options & C_SKIPORD) == 0) { - here.iov_len = ksize; - here.iov_base = key; - if (prev.iov_base && unlikely(mc->mc_dbx->md_cmp(&here, &prev) <= 0)) - rc = bad_page(mp, "leaf2-key #%u wrong order\n", i); - prev = here; - } - } - } else { - const MDBX_node *const node = page_node(mp, i); - const char *node_end = (char *)node + NODESIZE; - if (unlikely(node_end > end_of_page)) { - rc = bad_page(mp, "node (%zu) beyond page-end\n", - node_end - end_of_page); - continue; - } - if (IS_LEAF(mp) || i > 0) { - size_t ksize = node_ks(node); - char *key = node_key(node); - if (unlikely(end_of_page < key + ksize)) { - rc = bad_page(mp, "node-key (%zu) beyond page-end\n", - key + ksize - end_of_page); - continue; - } - - if ((options & C_COPYING) == 0) { - if (unlikely(ksize < mc->mc_dbx->md_klen_min || - ksize > mc->mc_dbx->md_klen_max)) - rc = bad_page( - mp, "node-key size (%zu) <> min/max key-length (%zu/%zu)\n", - ksize, mc->mc_dbx->md_klen_min, mc->mc_dbx->md_klen_max); - - if ((options & C_SKIPORD) == 0) { - here.iov_base = key; - here.iov_len = ksize; - if (prev.iov_base && - unlikely(mc->mc_dbx->md_cmp(&here, &prev) <= 0)) - rc = bad_page(mp, "node-key #%u wrong order\n", i); - prev = here; - } - } - } - if (IS_BRANCH(mp)) { - if ((options & C_RETIRING) == 0) { - const pgno_t ref = node_pgno(node); - if (unlikely(ref < MIN_PAGENO || ref >= mc->mc_txn->mt_next_pgno)) - rc = bad_page(mp, "branch-node wrong pgno (%u)\n", ref); - } - continue; - } - - switch (node_flags(node)) { - default: - rc = bad_page(mp, "invalid node flags (%u)\n", node_flags(node)); - break; - case F_BIGDATA /* data on large-page */: - case 0 /* usual */: - case F_SUBDATA /* sub-db */: - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: - case F_DUPDATA /* short sub-page */: - break; - } - - if (node_flags(node) & F_BIGDATA) { - const size_t dsize = node_ds(node); - if ((options & C_COPYING) == 0) { - if (unlikely(dsize <= mc->mc_dbx->md_vlen_min || - dsize > mc->mc_dbx->md_vlen_max)) - rc = bad_page( - mp, - "big-node data size (%zu) <> min/max value-length (%zu/%zu)\n", - dsize, mc->mc_dbx->md_vlen_min, mc->mc_dbx->md_vlen_max); - } - if ((options & C_RETIRING) == 0) { - MDBX_page *lp; - int err = mdbx_page_get(mc, node_largedata_pgno(node), &lp, NULL, - pp_txnid4chk(mp, mc->mc_txn)); - if (unlikely(err != MDBX_SUCCESS)) - return err; - if (unlikely(!IS_OVERFLOW(lp))) { - rc = bad_page(mp, "big-node refs to non-overflow page (%u)\n", - lp->mp_pgno); - continue; - } - if (unlikely(number_of_ovpages(env, dsize) > lp->mp_pages)) - rc = - bad_page(mp, "big-node size (%zu) mismatch n-pages size (%u)\n", - dsize, lp->mp_pages); - } - continue; - } - - const size_t dsize = node_ds(node); - const char *const data = node_data(node); - if (unlikely(end_of_page < data + dsize)) { - rc = bad_page(mp, - "node-data(%u of %u, %zu bytes) beyond (%zu) page-end\n", - i, nkeys, dsize, data + dsize - end_of_page); - continue; - } - - switch (node_flags(node)) { - default: - /* wrong, but already handled */ - continue; - case 0 /* usual */: - if ((options & C_COPYING) == 0) { - if (unlikely(dsize < mc->mc_dbx->md_vlen_min || - dsize > mc->mc_dbx->md_vlen_max)) { - rc = bad_page( - mp, "node-data size (%zu) <> min/max value-length (%zu/%zu)\n", - dsize, mc->mc_dbx->md_vlen_min, mc->mc_dbx->md_vlen_max); - continue; - } - } - break; - case F_SUBDATA /* sub-db */: - if (unlikely(dsize != sizeof(MDBX_db))) { - rc = bad_page(mp, "invalid sub-db record size (%zu)\n", dsize); - continue; - } - break; - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: - if (unlikely(dsize != sizeof(MDBX_db))) { - rc = bad_page(mp, "invalid nested-db record size (%zu)\n", dsize); - continue; - } - break; - case F_DUPDATA /* short sub-page */: - if (unlikely(dsize <= PAGEHDRSZ)) { - rc = bad_page(mp, "invalid nested-page record size (%zu)\n", dsize); - continue; - } 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: - rc = bad_page(mp, "invalid nested-page flags (%u)\n", sp->mp_flags); - continue; - } - - MDBX_val sub_here, sub_prev = {0, 0}; - 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); - if (unlikely(end_of_subpage < sub_key + sub_ksize)) { - rc = bad_page(mp, "nested-leaf2-key beyond (%zu) nested-page\n", - sub_key + sub_ksize - end_of_subpage); - continue; - } - - if ((options & C_COPYING) == 0) { - if (unlikely(sub_ksize != mc->mc_dbx->md_vlen_min)) { - if (unlikely(sub_ksize < mc->mc_dbx->md_vlen_min || - sub_ksize > mc->mc_dbx->md_vlen_max)) { - rc = bad_page(mp, - "nested-leaf2-key size (%zu) <> min/max " - "value-length (%zu/%zu)\n", - sub_ksize, mc->mc_dbx->md_vlen_min, - mc->mc_dbx->md_vlen_max); - continue; - } - mc->mc_dbx->md_vlen_min = mc->mc_dbx->md_vlen_max = sub_ksize; - } - if ((options & C_SKIPORD) == 0) { - sub_here.iov_len = sub_ksize; - sub_here.iov_base = sub_key; - if (sub_prev.iov_base && - unlikely(mc->mc_dbx->md_dcmp(&sub_prev, &sub_here) >= 0)) - rc = bad_page(mp, "nested-leaf2-key #%u wrong order\n", j); - sub_prev = sub_here; - } - } - } else { - const MDBX_node *const sub_node = page_node(sp, j); - const char *sub_node_end = (char *)sub_node + NODESIZE; - if (unlikely(sub_node_end > end_of_subpage)) { - rc = bad_page(mp, "nested-node beyond (%zu) nested-page\n", - end_of_subpage - sub_node_end); - continue; - } - if (unlikely(node_flags(sub_node) != 0)) - rc = bad_page(mp, "nested-node invalid flags (%u)\n", - node_flags(sub_node)); - - 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); */ - - if ((options & C_COPYING) == 0) { - if (unlikely(sub_ksize < mc->mc_dbx->md_vlen_min || - sub_ksize > mc->mc_dbx->md_vlen_max)) - rc = bad_page(mp, - "nested-node-key size (%zu) <> min/max " - "value-length (%zu/%zu)\n", - sub_ksize, mc->mc_dbx->md_vlen_min, - mc->mc_dbx->md_vlen_max); - - if ((options & C_SKIPORD) == 0) { - sub_here.iov_len = sub_ksize; - sub_here.iov_base = sub_key; - if (sub_prev.iov_base && - unlikely(mc->mc_dbx->md_dcmp(&sub_prev, &sub_here) >= 0)) - rc = bad_page(mp, "nested-node-key #%u wrong order\n", j); - sub_prev = sub_here; - } - } - if (unlikely(sub_dsize != 0)) - rc = bad_page(mp, "nested-node non-empty data size (%zu)\n", - sub_dsize); - if (unlikely(end_of_subpage < sub_key + sub_ksize)) - rc = bad_page(mp, "nested-node-key beyond (%zu) nested-page\n", - sub_key + sub_ksize - end_of_subpage); - } - } - } - break; - } - } - } - return rc; -} - -static __cold int mdbx_cursor_check(MDBX_cursor *mc, unsigned options) { - mdbx_tassert(mc->mc_txn, mc->mc_txn->mt_parent || - mc->mc_txn->tw.dirtyroom + - mc->mc_txn->tw.dirtylist->length == - mc->mc_txn->mt_env->me_options.dp_limit); - 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, (options & C_UPDATING) ? mc->mc_snum <= mc->mc_db->md_depth - : mc->mc_snum == mc->mc_db->md_depth); - if (unlikely((options & C_UPDATING) ? 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 < (int)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 ((options & C_UPDATING) == 0) { - 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, mp, options); - 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, pp_txnid4chk(mp, mc->mc_txn)); - 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, np, options); - 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_dbi dbi = mc->mc_dbi; - - mdbx_cassert(mc, cursor_is_tracked(mc)); - 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 (MDBX_cursor *m2 = mc->mc_txn->tw.cursors[dbi]; m2; m2 = m2->mc_next) { - MDBX_cursor *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 (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - - if (unlikely(!mc->mc_snum)) { - /* DB is totally empty now, just bail out. - * Other cursors adjustments were already done - * by mdbx_rebalance and aren't needed here. */ - 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_EOF; - return MDBX_SUCCESS; - } - - 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 (MDBX_cursor *m2 = mc->mc_txn->tw.cursors[dbi]; m2; m2 = m2->mc_next) { - MDBX_cursor *m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2; - if (!(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, SIBLING_RIGHT); - if (rc == MDBX_NOTFOUND) { - m3->mc_flags |= C_EOF; - rc = MDBX_SUCCESS; - continue; - } - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - if (m3->mc_ki[mc->mc_top] >= ki || - /* moved to right sibling */ m3->mc_pg[mc->mc_top] != mp) { - if (m3->mc_xcursor && !(m3->mc_flags & C_EOF)) { - 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 inited 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, m3->mc_pg[m3->mc_top]); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - rc = mdbx_cursor_first(&m3->mc_xcursor->mx_cursor, NULL, NULL); - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } - } - m3->mc_xcursor->mx_cursor.mc_flags |= C_DEL; - } - m3->mc_flags |= C_DEL; - } - } - } - - mdbx_cassert(mc, rc == MDBX_SUCCESS); - if (mdbx_audit_enabled()) - rc = mdbx_cursor_check(mc, 0); - return rc; - -bailout: - mc->mc_txn->mt_flags |= MDBX_TXN_ERROR; - 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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - if (unlikely(txn->mt_flags & (MDBX_TXN_RDONLY | MDBX_TXN_BLOCKED))) - return (txn->mt_flags & MDBX_TXN_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_ALLDUPS; - } - 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->tw.cursors[dbi]; - txn->tw.cursors[dbi] = &cx.outer; - rc = mdbx_cursor_del(&cx.outer, flags); - txn->tw.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, C_UPDATING); - 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); - } - - cursor_copy_internal(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, C_UPDATING); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - rc = mdbx_cursor_check(&mn, C_UPDATING); - 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, (int)mc->mc_snum - snum == mc->mc_db->md_depth - depth); - if (mdbx_audit_enabled()) { - rc = mdbx_cursor_check(mc, C_UPDATING); - 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, SIBLING_LEFT); - } - } - } 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 = bad_page(rp, "wrong page-type %u\n", PAGETYPE(rp)); - } - 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 = bad_page(rp, "wrong page-type %u\n", PAGETYPE(rp)); - } - 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->tw.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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - if (unlikely(flags & ~(MDBX_NOOVERWRITE | MDBX_NODUPDATA | MDBX_ALLDUPS | - MDBX_ALLDUPS | MDBX_RESERVE | MDBX_APPEND | - MDBX_APPENDDUP | MDBX_CURRENT | MDBX_MULTIPLE))) - return MDBX_EINVAL; - - if (unlikely(txn->mt_flags & (MDBX_TXN_RDONLY | MDBX_TXN_BLOCKED))) - return (txn->mt_flags & MDBX_TXN_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->tw.cursors[dbi]; - txn->tw.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) && - (flags & MDBX_ALLDUPS) == 0) { - /* 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->tw.cursors[dbi] = cx.outer.mc_next; - - return rc; -} - -/**** COPYING *****************************************************************/ - -#ifndef MDBX_WBUF -#define MDBX_WBUF ((size_t)1024 * 1024) -#endif - -/* State needed for a double-buffering compacting copy. */ -typedef struct mdbx_copy { - MDBX_env *mc_env; - MDBX_txn *mc_txn; - mdbx_condpair_t mc_condpair; - 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; - /* Error code. Never cleared if set. Both threads can set nonzero - * to fail the copy. Not mutex-protected, MDBX expects atomic int. */ - volatile int mc_error; - pgno_t mc_next_pgno; - volatile unsigned mc_head; - volatile unsigned mc_tail; -} mdbx_copy; - -/* Dedicated writer thread for compacting copy. */ -static THREAD_RESULT __cold THREAD_CALL mdbx_env_copythr(void *arg) { - mdbx_copy *my = arg; - -#if defined(EPIPE) && !(defined(_WIN32) || defined(_WIN64)) - sigset_t sigset; - sigemptyset(&sigset); - sigaddset(&sigset, SIGPIPE); - my->mc_error = pthread_sigmask(SIG_BLOCK, &sigset, NULL); -#endif /* EPIPE */ - - mdbx_condpair_lock(&my->mc_condpair); - while (!my->mc_error) { - while (my->mc_tail == my->mc_head && !my->mc_error) { - int err = mdbx_condpair_wait(&my->mc_condpair, true); - if (err != MDBX_SUCCESS) { - my->mc_error = err; - goto bailout; - } - } - const unsigned toggle = my->mc_tail & 1; - size_t wsize = my->mc_wlen[toggle]; - if (wsize == 0) { - my->mc_tail += 1; - break /* EOF */; - } - my->mc_wlen[toggle] = 0; - uint8_t *ptr = my->mc_wbuf[toggle]; - again: - if (!my->mc_error) { - int err = mdbx_write(my->mc_fd, ptr, wsize); - if (err != MDBX_SUCCESS) { -#if defined(EPIPE) && !(defined(_WIN32) || defined(_WIN64)) - if (err == EPIPE) { - /* Collect the pending SIGPIPE, - * otherwise at least OS X gives it to the process on thread-exit. */ - int unused; - sigwait(&sigset, &unused); - } -#endif /* EPIPE */ - my->mc_error = err; - goto bailout; - } - } - - /* If there's an overflow page tail, write it too */ - wsize = my->mc_olen[toggle]; - if (wsize) { - my->mc_olen[toggle] = 0; - ptr = my->mc_over[toggle]; - goto again; - } - my->mc_tail += 1; - mdbx_condpair_signal(&my->mc_condpair, false); - } -bailout: - mdbx_condpair_unlock(&my->mc_condpair); - return (THREAD_RESULT)0; -} - -/* Give buffer and/or MDBX_EOF to writer thread, await unused buffer. */ -static __cold int mdbx_env_cthr_toggle(mdbx_copy *my) { - mdbx_condpair_lock(&my->mc_condpair); - mdbx_assert(my->mc_env, my->mc_head - my->mc_tail < 2 || my->mc_error); - my->mc_head += 1; - mdbx_condpair_signal(&my->mc_condpair, true); - while (!my->mc_error && - my->mc_head - my->mc_tail == 2 /* both buffers in use */) { - int err = mdbx_condpair_wait(&my->mc_condpair, false); - if (err != MDBX_SUCCESS) - my->mc_error = err; - } - mdbx_condpair_unlock(&my->mc_condpair); - 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 __cold int mdbx_env_cwalk(mdbx_copy *my, pgno_t *pg, int flags) { - MDBX_cursor_couple couple; - MDBX_page *mo, *mp, *leaf; - char *buf, *ptr; - int rc; - unsigned i; - - /* Empty DB, nothing to do */ - if (*pg == P_INVALID) - return MDBX_SUCCESS; - - memset(&couple, 0, sizeof(couple)); - couple.outer.mc_snum = 1; - couple.outer.mc_txn = my->mc_txn; - couple.outer.mc_flags = couple.inner.mx_cursor.mc_flags = - C_COPYING | C_SKIPORD; - - rc = mdbx_page_get(&couple.outer, *pg, &couple.outer.mc_pg[0], NULL, - my->mc_txn->mt_txnid); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - rc = mdbx_page_search_root(&couple.outer, NULL, MDBX_PS_FIRST); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - /* Make cursor pages writable */ - buf = ptr = mdbx_malloc(pgno2bytes(my->mc_env, couple.outer.mc_snum)); - if (buf == NULL) - return MDBX_ENOMEM; - - for (i = 0; i < couple.outer.mc_top; i++) { - mdbx_page_copy((MDBX_page *)ptr, couple.outer.mc_pg[i], - my->mc_env->me_psize); - couple.outer.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; - - while (couple.outer.mc_snum > 0) { - mp = couple.outer.mc_pg[couple.outer.mc_top]; - unsigned 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) { - couple.outer.mc_pg[couple.outer.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(&couple.outer, pgno, &omp, NULL, - pp_txnid4chk(mp, my->mc_txn)); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - unsigned toggle = my->mc_head & 1; - if (my->mc_wlen[toggle] + my->mc_env->me_psize > MDBX_WBUF) { - rc = mdbx_env_cthr_toggle(my); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - toggle = my->mc_head & 1; - } - 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; - 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); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - toggle = my->mc_head & 1; - } - } 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) { - couple.outer.mc_pg[couple.outer.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)); - rc = mdbx_env_cwalk(my, &db.md_root, node_flags(node) & F_DUPDATA); - if (rc) - goto done; - memcpy(node_data(node), &db, sizeof(MDBX_db)); - } - } - } - } else { - couple.outer.mc_ki[couple.outer.mc_top]++; - if (couple.outer.mc_ki[couple.outer.mc_top] < n) { - again: - rc = mdbx_page_get( - &couple.outer, - node_pgno(page_node(mp, couple.outer.mc_ki[couple.outer.mc_top])), - &mp, NULL, pp_txnid4chk(mp, my->mc_txn)); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - couple.outer.mc_top++; - couple.outer.mc_snum++; - couple.outer.mc_ki[couple.outer.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(couple.outer.mc_pg[couple.outer.mc_top], mp, - my->mc_env->me_psize); - goto again; - } else - couple.outer.mc_pg[couple.outer.mc_top] = mp; - continue; - } - } - unsigned toggle = my->mc_head & 1; - if (my->mc_wlen[toggle] + my->mc_wlen[toggle] > MDBX_WBUF) { - rc = mdbx_env_cthr_toggle(my); - if (unlikely(rc != MDBX_SUCCESS)) - goto done; - toggle = my->mc_head & 1; - } - mo = (MDBX_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]); - mdbx_page_copy(mo, mp, my->mc_env->me_psize); - mo->mp_pgno = my->mc_next_pgno++; - my->mc_wlen[toggle] += my->mc_env->me_psize; - if (couple.outer.mc_top) { - /* Update parent if there is one */ - node_set_pgno(page_node(couple.outer.mc_pg[couple.outer.mc_top - 1], - couple.outer.mc_ki[couple.outer.mc_top - 1]), - mo->mp_pgno); - mdbx_cursor_pop(&couple.outer); - } 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) { - meta->mm_geo.now = meta->mm_geo.next; - const pgno_t aligner = - meta->mm_geo.grow ? meta->mm_geo.grow : meta->mm_geo.shrink; - if (aligner) { - 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); - unaligned_poke_u64(4, meta->mm_datasync_sign, mdbx_meta_sign(meta)); -} - -/* Make resizeable */ -static __cold void make_sizeable(MDBX_meta *meta) { - meta->mm_geo.lower = MIN_PAGENO; - if (meta->mm_geo.grow == 0) { - const size_t step = 1 + (meta->mm_geo.upper - meta->mm_geo.lower) / 42; - meta->mm_geo.grow = (step < UINT16_MAX) ? (uint16_t)step : UINT16_MAX; - } - if (meta->mm_geo.shrink == 0) { - const size_t step = meta->mm_geo.grow + meta->mm_geo.grow; - meta->mm_geo.shrink = (step < UINT16_MAX) ? (uint16_t)step : UINT16_MAX; - } -} - -/* Copy environment with compaction. */ -static __cold int mdbx_env_compact(MDBX_env *env, MDBX_txn *read_txn, - mdbx_filehandle_t fd, uint8_t *buffer, - const bool dest_is_pipe, const int flags) { - 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); - mdbx_meta_set_txnid(env, meta, read_txn->mt_txnid); - - if (flags & MDBX_CP_FORCE_DYNAMIC_SIZE) - make_sizeable(meta); - - /* copy canary sequences 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_couple couple; - MDBX_val key, data; - - int rc = mdbx_cursor_init(&couple.outer, read_txn, FREE_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - while ((rc = mdbx_cursor_get(&couple.outer, &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_condpair_init(&ctx.mc_condpair); - 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); - mdbx_env_cthr_toggle(&ctx); - thread_err = mdbx_thread_join(thread); - mdbx_assert(env, (ctx.mc_tail == ctx.mc_head && - ctx.mc_wlen[ctx.mc_head & 1] == 0) || - ctx.mc_error); - mdbx_condpair_destroy(&ctx.mc_condpair); - } - 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_warning("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 avoid 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 __cold int mdbx_env_copy_asis(MDBX_env *env, MDBX_txn *read_txn, - mdbx_filehandle_t fd, uint8_t *buffer, - const bool dest_is_pipe, const int flags) { - /* 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_TXN_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 snapshot copy */ - (MDBX_meta *)(buffer + ((uint8_t *)mdbx_meta_head(env) - env->me_map)); - mdbx_txn_unlock(env); - - if (flags & MDBX_CP_FORCE_DYNAMIC_SIZE) - make_sizeable(headcopy); - /* Update signature to steady */ - unaligned_poke_u64(4, headcopy->mm_datasync_sign, mdbx_meta_sign(headcopy)); - - /* 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 MDBX_USE_SENDFILE - static bool sendfile_unavailable; - if (dest_is_pipe && likely(!sendfile_unavailable)) { - off_t in_offset = offset; - const ssize_t written = - sendfile(fd, env->me_lazy_fd, &in_offset, used_size - offset); - if (likely(written > 0)) { - offset = in_offset; - continue; - } - rc = MDBX_ENODATA; - if (written == 0 || ignore_enosys(rc = errno) != MDBX_RESULT_TRUE) - break; - sendfile_unavailable = true; - } -#endif /* MDBX_USE_SENDFILE */ - -#if MDBX_USE_COPYFILERANGE - static bool copyfilerange_unavailable; - if (!dest_is_pipe && likely(!copyfilerange_unavailable)) { - 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 (likely(bytes_copied > 0)) { - offset = in_offset; - continue; - } - rc = MDBX_ENODATA; - if (bytes_copied == 0 || ignore_enosys(rc = errno) != MDBX_RESULT_TRUE) - break; - copyfilerange_unavailable = true; - } -#endif /* MDBX_USE_COPYFILERANGE */ - - /* fallback to portable */ - const size_t chunk = - (MDBX_WBUF < used_size - offset) ? MDBX_WBUF : used_size - offset; - /* copy to avoid 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 avoid EFAULT in case swapped-out */ - rc = mdbx_write(fd, data_buffer, chunk); - offset += chunk; - } - } - } - - return rc; -} - -__cold int mdbx_env_copy2fd(MDBX_env *env, mdbx_filehandle_t fd, - unsigned flags) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - const int dest_is_pipe = mdbx_is_pipe(fd); - if (MDBX_IS_ERROR(dest_is_pipe)) - return dest_is_pipe; - - if (!dest_is_pipe) { - 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; - 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_TXN_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 : mdbx_env_copy_asis)( - env, read_txn, fd, buffer, dest_is_pipe, flags); - } - mdbx_txn_abort(read_txn); - - if (!dest_is_pipe) { - if (likely(rc == MDBX_SUCCESS)) - rc = mdbx_fsync(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_fsync(fd, MDBX_SYNC_DATA | MDBX_SYNC_IODQ); - } - - mdbx_memalign_free(buffer); - return rc; -} - -__cold int mdbx_env_copy(MDBX_env *env, const char *dest_path, - MDBX_copy_flags_t flags) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!dest_path)) - return MDBX_EINVAL; - - /* 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; - rc = mdbx_openfile(MDBX_OPEN_COPY, env, dest_path, &newfd, -#if defined(_WIN32) || defined(_WIN64) - (mdbx_mode_t)-1 -#else - S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP -#endif - ); - - if (rc == MDBX_SUCCESS) { -#if defined(_WIN32) || defined(_WIN64) - OVERLAPPED ov; - memset(&ov, 0, sizeof(ov)); - if (!LockFileEx(newfd, LOCKFILE_EXCLUSIVE_LOCK | LOCKFILE_FAIL_IMMEDIATELY, - 0, 0, INT32_MAX, &ov)) - rc = GetLastError(); -#else - struct flock lock_op; - memset(&lock_op, 0, sizeof(lock_op)); - lock_op.l_type = F_WRLCK; - lock_op.l_whence = SEEK_SET; - lock_op.l_start = 0; - lock_op.l_len = - (sizeof(lock_op.l_len) > 4 ? INT64_MAX : INT32_MAX) & ~(size_t)0xffff; - if (fcntl(newfd, F_SETLK, &lock_op) -#if (defined(__linux__) || defined(__gnu_linux__)) && defined(LOCK_EX) && \ - (!defined(__ANDROID_API__) || __ANDROID_API__ >= 24) - || flock(newfd, LOCK_EX | LOCK_NB) -#endif /* Linux */ - ) - rc = errno; -#endif /* Windows / POSIX */ - } - - 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; -} - -/******************************************************************************/ - -__cold int mdbx_env_set_flags(MDBX_env *env, MDBX_env_flags_t flags, - bool onoff) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(flags & ~ENV_CHANGEABLE_FLAGS)) - 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; - - rc = mdbx_txn_lock(env, false); - if (unlikely(rc)) - return rc; - - if (onoff) - env->me_flags = merge_sync_flags(env->me_flags, flags); - else - env->me_flags &= ~flags; - - mdbx_txn_unlock(env); - return MDBX_SUCCESS; -} - -__cold int mdbx_env_get_flags(const MDBX_env *env, unsigned *arg) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!arg)) - return MDBX_EINVAL; - - *arg = env->me_flags & ENV_USABLE_FLAGS; - return MDBX_SUCCESS; -} - -__cold int mdbx_env_set_userctx(MDBX_env *env, void *ctx) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - env->me_userctx = ctx; - return MDBX_SUCCESS; -} - -void *__cold mdbx_env_get_userctx(const MDBX_env *env) { - return env ? env->me_userctx : NULL; -} - -__cold int mdbx_env_set_assert(MDBX_env *env, MDBX_assert_func *func) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - -#if MDBX_DEBUG - env->me_assert_func = func; - return MDBX_SUCCESS; -#else - (void)func; - return MDBX_ENOSYS; -#endif -} - -__cold int mdbx_env_get_path(const MDBX_env *env, const char **arg) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!arg)) - return MDBX_EINVAL; - - *arg = env->me_pathname; - return MDBX_SUCCESS; -} - -__cold int mdbx_env_get_fd(const MDBX_env *env, mdbx_filehandle_t *arg) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!arg)) - return MDBX_EINVAL; - - *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; -} - -__cold int mdbx_env_stat(const MDBX_env *env, MDBX_stat *stat, size_t bytes) { - return __inline_mdbx_env_stat(env, stat, bytes); -} - -__cold int 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) { - int err = check_env(env); - if (unlikely(err != MDBX_SUCCESS)) - return err; - 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; - } -} - -__cold int mdbx_dbi_dupsort_depthmask(MDBX_txn *txn, MDBX_dbi dbi, - uint32_t *mask) { - int rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mask)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DBI_VALID))) - return MDBX_BAD_DBI; - - MDBX_cursor_couple cx; - rc = mdbx_cursor_init(&cx.outer, txn, dbi); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - if ((cx.outer.mc_db->md_flags & MDBX_DUPSORT) == 0) - return MDBX_RESULT_TRUE; - - MDBX_val key, data; - rc = mdbx_cursor_first(&cx.outer, &key, &data); - *mask = 0; - while (rc == MDBX_SUCCESS) { - const MDBX_node *node = page_node(cx.outer.mc_pg[cx.outer.mc_top], - cx.outer.mc_ki[cx.outer.mc_top]); - const MDBX_db *db = node_data(node); - const unsigned flags = node_flags(node); - switch (flags) { - case F_BIGDATA: - case 0: - /* single-value entry, deep = 0 */ - *mask |= 1 << 0; - break; - case F_DUPDATA: - /* single sub-page, deep = 1 */ - *mask |= 1 << 1; - break; - case F_DUPDATA | F_SUBDATA: - /* sub-tree */ - *mask |= 1 << unaligned_peek_u16(1, &db->md_depth); - break; - default: - mdbx_error("wrong node-flags %u", flags); - return MDBX_CORRUPTED; - } - rc = mdbx_cursor_next(&cx.outer, &key, &data, MDBX_NEXT_NODUP); - } - - return (rc == MDBX_NOTFOUND) ? MDBX_SUCCESS : rc; -} - -__cold int mdbx_env_info(const MDBX_env *env, MDBX_envinfo *info, - size_t bytes) { - return __inline_mdbx_env_info(env, info, bytes); -} - -__cold int 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) { - int err = check_env(env); - if (unlikely(err != MDBX_SUCCESS)) - return err; - 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 = unaligned_peek_u64(4, meta0->mm_datasync_sign); - arg->mi_meta1_txnid = mdbx_meta_txnid_fluid(env, meta1); - arg->mi_meta1_sign = unaligned_peek_u64(4, meta1->mm_datasync_sign); - arg->mi_meta2_txnid = mdbx_meta_txnid_fluid(env, meta2); - arg->mi_meta2_sign = unaligned_peek_u64(4, meta2->mm_datasync_sign); - if (likely(bytes > size_before_bootid)) { - memcpy(&arg->mi_bootid.meta0, &meta0->mm_bootid, 16); - memcpy(&arg->mi_bootid.meta1, &meta1->mm_bootid, 16); - memcpy(&arg->mi_bootid.meta2, &meta2->mm_bootid, 16); - } - - 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_TXN_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 = atomic_load32(env->me_unsynced_pages, mo_Relaxed) + - (atomic_load32(env->me_meta_sync_txnid, mo_Relaxed) != - (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 == - unaligned_peek_u64(4, meta0->mm_datasync_sign) && - arg->mi_meta1_txnid == mdbx_meta_txnid_fluid(env, meta1) && - arg->mi_meta1_sign == - unaligned_peek_u64(4, meta1->mm_datasync_sign) && - arg->mi_meta2_txnid == mdbx_meta_txnid_fluid(env, meta2) && - arg->mi_meta2_sign == - unaligned_peek_u64(4, 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 ? atomic_load32(&env->me_lck->mti_numreaders, mo_Relaxed) - : 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 - atomic_load64(env->me_sync_timestamp, mo_Relaxed)); - arg->mi_since_reader_check_seconds16dot16 = - lck ? mdbx_osal_monotime_to_16dot16( - monotime_now - - atomic_load64(&lck->mti_reader_check_timestamp, mo_Relaxed)) - : 0; - arg->mi_autosync_threshold = - pgno2bytes(env, atomic_load32(env->me_autosync_threshold, mo_Relaxed)); - arg->mi_autosync_period_seconds16dot16 = mdbx_osal_monotime_to_16dot16( - atomic_load64(env->me_autosync_period, mo_Relaxed)); - arg->mi_bootid.current.x = bootid.x; - arg->mi_bootid.current.y = bootid.y; - arg->mi_mode = lck ? lck->mti_envmode.weak : 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 = - atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease); - 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 __inline MDBX_cmp_func *get_default_keycmp(unsigned flags) { - return (flags & MDBX_REVERSEKEY) - ? cmp_reverse - : (flags & MDBX_INTEGERKEY) ? cmp_int_align2 : cmp_lexical; -} - -static __inline MDBX_cmp_func *get_default_datacmp(unsigned flags) { - return !(flags & MDBX_DUPSORT) - ? cmp_lenfast - : ((flags & MDBX_INTEGERDUP) - ? cmp_int_unaligned - : ((flags & MDBX_REVERSEDUP) ? cmp_reverse : cmp_lexical)); -} - -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) & DB_PERSISTENT_FLAGS) { - /* flags are differs, check other conditions */ - if ((!user_flags && (!keycmp || keycmp == txn->mt_dbxs[dbi].md_cmp) && - (!datacmp || datacmp == txn->mt_dbxs[dbi].md_dcmp)) || - user_flags == MDBX_ACCEDE) { - /* 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_TXN_RDONLY) - return /* FIXME: return extended info */ MDBX_EACCESS; - /* make sure flags changes get committed */ - txn->mt_dbs[dbi].md_flags = user_flags & DB_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 - : get_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 - : get_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; -} - -static int dbi_open(MDBX_txn *txn, const char *table_name, unsigned user_flags, - MDBX_dbi *dbi, MDBX_cmp_func *keycmp, - MDBX_cmp_func *datacmp) { - int rc = MDBX_EINVAL; - if (unlikely(!dbi)) - return rc; - - if (unlikely((user_flags & ~DB_USABLE_FLAGS) != 0)) { - early_bailout: - *dbi = 0; - return rc; - } - - rc = check_txn(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - goto early_bailout; - - switch (user_flags & (MDBX_INTEGERDUP | MDBX_DUPFIXED | MDBX_DUPSORT | - MDBX_REVERSEDUP | MDBX_ACCEDE)) { - case MDBX_ACCEDE: - if ((user_flags & MDBX_CREATE) == 0) - break; - __fallthrough /* fall through */; - default: - rc = MDBX_EINVAL; - goto early_bailout; - - 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 (unlikely(rc != MDBX_SUCCESS)) - goto early_bailout; - *dbi = MAIN_DBI; - return rc; - } - - if (txn->mt_dbxs[MAIN_DBI].md_cmp == NULL) { - txn->mt_dbxs[MAIN_DBI].md_cmp = - get_default_keycmp(txn->mt_dbs[MAIN_DBI].md_flags); - txn->mt_dbxs[MAIN_DBI].md_dcmp = - get_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)) { - rc = mdbx_dbi_bind(txn, scan, user_flags, keycmp, datacmp); - if (unlikely(rc != MDBX_SUCCESS)) - goto early_bailout; - *dbi = scan; - return rc; - } - } - - /* Fail, if no free slot and max hit */ - MDBX_env *env = txn->mt_env; - if (unlikely(slot >= env->me_maxdbs)) { - rc = MDBX_DBS_FULL; - goto early_bailout; - } - - /* Cannot mix named table with some main-table flags */ - if (unlikely(txn->mt_dbs[MAIN_DBI].md_flags & - (MDBX_DUPSORT | MDBX_INTEGERKEY))) { - rc = (user_flags & MDBX_CREATE) ? MDBX_INCOMPATIBLE : MDBX_NOTFOUND; - goto early_bailout; - } - - /* Find the DB info */ - int exact = 0; - MDBX_val key, data; - key.iov_len = len; - key.iov_base = (void *)table_name; - MDBX_cursor_couple couple; - rc = mdbx_cursor_init(&couple.outer, txn, MAIN_DBI); - if (unlikely(rc != MDBX_SUCCESS)) - goto early_bailout; - rc = mdbx_cursor_set(&couple.outer, &key, &data, MDBX_SET, &exact); - if (unlikely(rc != MDBX_SUCCESS)) { - if (rc != MDBX_NOTFOUND || !(user_flags & MDBX_CREATE)) - goto early_bailout; - } else { - /* make sure this is actually a table */ - MDBX_node *node = page_node(couple.outer.mc_pg[couple.outer.mc_top], - couple.outer.mc_ki[couple.outer.mc_top]); - if (unlikely((node_flags(node) & (F_DUPDATA | F_SUBDATA)) != F_SUBDATA)) { - rc = MDBX_INCOMPATIBLE; - goto early_bailout; - } - if (unlikely(data.iov_len != sizeof(MDBX_db))) { - rc = MDBX_CORRUPTED; - goto early_bailout; - } - } - - if (rc != MDBX_SUCCESS && unlikely(txn->mt_flags & MDBX_TXN_RDONLY)) { - rc = MDBX_EACCESS; - goto early_bailout; - } - - /* Done here so we cannot fail after creating a new DB */ - char *namedup = mdbx_strdup(table_name); - if (unlikely(!namedup)) { - rc = MDBX_ENOMEM; - goto early_bailout; - } - - int err = mdbx_fastmutex_acquire(&env->me_dbi_lock); - if (unlikely(err != MDBX_SUCCESS)) { - rc = err; - mdbx_free(namedup); - goto early_bailout; - } - - /* Import handles from env */ - dbi_import_locked(txn); - - /* Rescan after mutex acquisition & import handles */ - 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)) { - rc = mdbx_dbi_bind(txn, scan, user_flags, keycmp, datacmp); - if (unlikely(rc != MDBX_SUCCESS)) - goto later_bailout; - *dbi = scan; - goto later_exit; - } - } - - if (unlikely(slot >= env->me_maxdbs)) { - rc = MDBX_DBS_FULL; - goto later_bailout; - } - - unsigned dbiflags = DBI_FRESH | DBI_VALID | DBI_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 & DB_PERSISTENT_FLAGS; - data.iov_len = sizeof(db_dummy); - data.iov_base = &db_dummy; - WITH_CURSOR_TRACKING(couple.outer, - rc = mdbx_cursor_put(&couple.outer, &key, &data, - F_SUBDATA | MDBX_NOOVERWRITE)); - - if (unlikely(rc != MDBX_SUCCESS)) - goto later_bailout; - - dbiflags |= DBI_DIRTY | DBI_CREAT; - txn->mt_flags |= MDBX_TXN_DIRTY; - } - - /* Got info, register DBI in this txn */ - memset(txn->mt_dbxs + slot, 0, sizeof(MDBX_dbx)); - 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, (dbiflags & DBI_CREAT) == 0); - later_bailout: - *dbi = 0; - later_exit: - mdbx_free(namedup); - } else { - txn->mt_dbistate[slot] = (uint8_t)dbiflags; - txn->mt_dbxs[slot].md_name.iov_base = namedup; - txn->mt_dbxs[slot].md_name.iov_len = len; - txn->mt_dbiseqs[slot] = ++env->me_dbiseqs[slot]; - if (!(dbiflags & DBI_CREAT)) - env->me_dbflags[slot] = txn->mt_dbs[slot].md_flags | DB_VALID; - if (txn->mt_numdbs == slot) { - mdbx_compiler_barrier(); - txn->mt_numdbs = env->me_numdbs = slot + 1; - if (!(txn->mt_flags & MDBX_TXN_RDONLY)) - txn->tw.cursors[slot] = NULL; - } - mdbx_assert(env, env->me_numdbs > 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, - MDBX_db_flags_t table_flags, MDBX_dbi *dbi) { - return dbi_open(txn, table_name, table_flags, dbi, nullptr, nullptr); -} - -int mdbx_dbi_open_ex(MDBX_txn *txn, const char *table_name, - MDBX_db_flags_t table_flags, MDBX_dbi *dbi, - MDBX_cmp_func *keycmp, MDBX_cmp_func *datacmp) { - return dbi_open(txn, table_name, table_flags, dbi, keycmp, datacmp); -} - -__cold int 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, DBI_VALID))) - return MDBX_BAD_DBI; - - 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_dbistate[dbi] & DBI_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_dbiseqs[dbi]++; - env->me_dbxs[dbi].md_name.iov_len = 0; - mdbx_memory_fence(false, true); - env->me_dbxs[dbi].md_name.iov_base = NULL; - mdbx_free(ptr); - - if (env->me_numdbs == dbi + 1) - env->me_numdbs = dbi; - - return MDBX_SUCCESS; -} - -int mdbx_dbi_close(MDBX_env *env, MDBX_dbi dbi) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(dbi < CORE_DBS || dbi >= env->me_maxdbs)) - return MDBX_BAD_DBI; - - rc = mdbx_fastmutex_acquire(&env->me_dbi_lock); - if (likely(rc == MDBX_SUCCESS)) { - rc = (dbi < env->me_maxdbs && (env->me_dbflags[dbi] & DB_VALID)) - ? mdbx_dbi_close_locked(env, dbi) - : MDBX_BAD_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, DBI_VALID))) - return MDBX_BAD_DBI; - - *flags = txn->mt_dbs[dbi].md_flags & DB_PERSISTENT_FLAGS; - *state = - txn->mt_dbistate[dbi] & (DBI_FRESH | DBI_CREAT | DBI_DIRTY | DBI_STALE); - - return MDBX_SUCCESS; -} - -int mdbx_dbi_flags(MDBX_txn *txn, MDBX_dbi dbi, unsigned *flags) { - return __inline_mdbx_dbi_flags(txn, dbi, flags); -} - -/* 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; - - cursor_copy_internal(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, - pp_txnid4chk(mp, mc->mc_txn)); - 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, mp); - 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, SIBLING_RIGHT); - 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, bool del) { - int rc = check_txn_rw(txn, MDBX_TXN_BLOCKED); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DBI_USRVALID))) - return MDBX_BAD_DBI; - - 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, DBI_USRVALID))) { - rc = MDBX_BAD_DBI; - 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->tw.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_dbistate[dbi] = DBI_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_dbistate[dbi] |= DBI_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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - 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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - txn->mt_dbxs[dbi].md_dcmp = cmp; - return MDBX_SUCCESS; -} - -__cold int mdbx_reader_list(const MDBX_env *env, MDBX_reader_list_func *func, - void *ctx) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (unlikely(!func)) - return MDBX_EINVAL; - - rc = MDBX_RESULT_TRUE; - int serial = 0; - if (likely(env->me_lck)) { - const unsigned snap_nreaders = - atomic_load32(&env->me_lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; i++) { - const MDBX_reader *r = env->me_lck->mti_readers + i; - retry_reader:; - const uint32_t pid = atomic_load32(&r->mr_pid, mo_AcquireRelease); - if (!pid) - continue; - txnid_t txnid = safe64_read(&r->mr_txnid); - const uint64_t tid = atomic_load64(&r->mr_tid, mo_Relaxed); - const pgno_t pages_used = - atomic_load32(&r->mr_snapshot_pages_used, mo_Relaxed); - const uint64_t reader_pages_retired = - atomic_load64(&r->mr_snapshot_pages_retired, mo_Relaxed); - if (unlikely( - txnid != safe64_read(&r->mr_txnid) || - pid != atomic_load32(&r->mr_pid, mo_AcquireRelease) || - tid != atomic_load64(&r->mr_tid, mo_Relaxed) || - pages_used != - atomic_load32(&r->mr_snapshot_pages_used, mo_Relaxed) || - reader_pages_retired != - atomic_load64(&r->mr_snapshot_pages_retired, mo_Relaxed))) - 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 = - unaligned_peek_u64(4, 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 != - unaligned_peek_u64(4, 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 bool __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 false; - } - } - - if (val > 0) - ++cursor; - - ids[0]++; - for (n = ids[0]; n > cursor; n--) - ids[n] = ids[n - 1]; - ids[n] = pid; - return true; -} - -__cold int mdbx_reader_check(MDBX_env *env, int *dead) { - if (dead) - *dead = 0; - return mdbx_cleanup_dead_readers(env, false, dead); -} - -/* Return: - * MDBX_RESULT_TRUE - done and mutex recovered - * MDBX_SUCCESS - done - * Otherwise errcode. */ -MDBX_INTERNAL_FUNC __cold int -mdbx_cleanup_dead_readers(MDBX_env *env, int rdt_locked, int *dead) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - mdbx_assert(env, rdt_locked >= 0); - MDBX_lockinfo *const lck = env->me_lck; - if (unlikely(lck == NULL)) { - /* exclusive mode */ - if (dead) - *dead = 0; - return MDBX_SUCCESS; - } - - const unsigned snap_nreaders = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - 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 count = 0; - for (unsigned i = 0; i < snap_nreaders; i++) { - const uint32_t pid = - atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease); - if (pid == 0) - continue /* skip empty */; - if (pid == env->me_pid) - continue /* skip self */; - if (!mdbx_pid_insert(pids, pid)) - 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.weak != 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.weak == pid) { - mdbx_debug("clear stale reader pid %" PRIuPTR " txn %" PRIaTXN, - (size_t)pid, lck->mti_readers[j].mr_txnid.weak); - atomic_store32(&lck->mti_readers[j].mr_pid, 0, mo_AcquireRelease); - atomic_store32(&lck->mti_readers_refresh_flag, true, mo_AcquireRelease); - count++; - } - } - } - - if (likely(!MDBX_IS_ERROR(rc))) - atomic_store64(&lck->mti_reader_check_timestamp, mdbx_osal_monotime(), - mo_AcquireRelease); - - if (rdt_locked < 0) - mdbx_rdt_unlock(env); - - if (pids != pidsbuf_onstask) - mdbx_free(pids); - - if (dead) - *dead = count; - return rc; -} - -__cold int mdbx_setup_debug(int loglevel, int flags, MDBX_debug_func *logger) { - const int rc = mdbx_runtime_flags | (mdbx_loglevel << 16); - - if (loglevel != MDBX_LOG_DONTCHANGE) - mdbx_loglevel = (uint8_t)loglevel; - - 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_kick_longlived_readers(MDBX_env *env, - const txnid_t laggard) { - mdbx_debug("DB size maxed out by reading #%" PRIaTXN, laggard); - - 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->weak); - if (oldest == laggard || unlikely(!env->me_lck /* without-LCK mode */)) - return oldest; - - if (MDBX_IS_ERROR(mdbx_cleanup_dead_readers(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 = - atomic_load32(&lck->mti_numreaders, mo_AcquireRelease); - for (unsigned i = 0; i < snap_nreaders; ++i) { - retry: - if (atomic_load32(&lck->mti_readers[i].mr_pid, mo_AcquireRelease)) { - /* mdbx_jitter4testing(true); */ - const uint64_t snap_retired = atomic_load64( - &lck->mti_readers[i].mr_snapshot_pages_retired, mo_Relaxed); - const txnid_t snap_txnid = safe64_read(&lck->mti_readers[i].mr_txnid); - if (unlikely(snap_retired != - atomic_load64( - &lck->mti_readers[i].mr_snapshot_pages_retired, - mo_AcquireRelease) || - 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_hsr_callback) { - /* LY: notify end of hsr-loop */ - const txnid_t gap = oldest - laggard; - env->me_hsr_callback(env, env->me_txn, 0, 0, laggard, - (gap < UINT_MAX) ? (unsigned)gap : UINT_MAX, 0, - -retry); - } - mdbx_notice("hsr-kick: update oldest %" PRIaTXN " -> %" PRIaTXN, - env->me_oldest->weak, oldest); - mdbx_assert(env, env->me_oldest->weak <= oldest); - return atomic_store64(env->me_oldest, oldest, mo_AcquireRelease); - } - - if (!env->me_hsr_callback) - break; - - uint32_t pid = atomic_load32(&asleep->mr_pid, mo_AcquireRelease); - uint64_t tid = asleep->mr_tid.weak; - 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 = - unaligned_peek_u64(4, 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_hsr_callback( - env, env->me_txn, 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); - atomic_store64(&asleep->mr_tid, 0, mo_Relaxed); - atomic_store32(&asleep->mr_pid, 0, mo_Relaxed); - } - atomic_store32(&lck->mti_readers_refresh_flag, true, mo_AcquireRelease); - } - } - - if (retry && env->me_hsr_callback) { - /* LY: notify end of hsr-loop */ - env->me_hsr_callback(env, env->me_txn, 0, 0, laggard, 0, 0, -retry); - } - return mdbx_find_oldest(env->me_txn); -} - -__cold int mdbx_env_set_syncbytes(MDBX_env *env, size_t threshold) { - return __inline_mdbx_env_set_syncbytes(env, threshold); -} - -__cold int mdbx_env_set_syncperiod(MDBX_env *env, unsigned seconds_16dot16) { - return __inline_mdbx_env_set_syncperiod(env, seconds_16dot16); -} - -__cold int mdbx_env_set_hsr(MDBX_env *env, MDBX_hsr_func *hsr) { - int rc = check_env(env); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - env->me_hsr_callback = hsr; - return MDBX_SUCCESS; -} - -MDBX_hsr_func *__cold mdbx_env_get_hsr(const MDBX_env *env) { - return likely(env && env->me_signature.weak == MDBX_ME_SIGNATURE) - ? env->me_hsr_callback - : 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_TXN_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_txn *mw_txn; - MDBX_cursor *mw_cursor; - bool mw_dont_check_keys_ordering; -} mdbx_walk_ctx_t; - -static __cold int mdbx_walk_sdb(mdbx_walk_ctx_t *ctx, MDBX_db *const db, - const char *name, int deep); - -static MDBX_page_type_t walk_page_type(const MDBX_page *mp) { - if (mp) - switch (mp->mp_flags) { - case P_BRANCH: - return MDBX_page_branch; - case P_LEAF: - return MDBX_page_leaf; - case P_LEAF | P_LEAF2: - return MDBX_page_dupfixed_leaf; - case P_OVERFLOW: - return MDBX_page_large; - case P_META: - return MDBX_page_meta; - } - return MDBX_page_broken; -} - -/* Depth-first tree traversal. */ -static __cold int mdbx_walk_tree(mdbx_walk_ctx_t *ctx, const pgno_t pgno, - const char *name, int deep, - txnid_t parent_txnid) { - assert(pgno != P_INVALID); - MDBX_page *mp = nullptr; - int rc, err = mdbx_page_get(ctx->mw_cursor, pgno, &mp, NULL, parent_txnid); - if (err == MDBX_SUCCESS) - err = mdbx_page_check(ctx->mw_cursor, mp, 0); - - MDBX_page_type_t type = walk_page_type(mp); - const int nentries = (mp && !IS_OVERFLOW(mp)) ? page_numkeys(mp) : 1; - unsigned npages = (mp && IS_OVERFLOW(mp)) ? mp->mp_pages : 1; - size_t pagesize = pgno2bytes(ctx->mw_txn->mt_env, npages); - size_t header_size = (mp && !IS_LEAF2(mp) && !IS_OVERFLOW(mp)) - ? PAGEHDRSZ + mp->mp_lower - : PAGEHDRSZ; - size_t payload_size = 0; - size_t unused_size = - (mp && !IS_OVERFLOW(mp) ? page_room(mp) : pagesize - header_size) - - payload_size; - size_t align_bytes = 0; - - if (err == MDBX_SUCCESS) { - /* 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) { - default: - err = MDBX_CORRUPTED; - break; - case P_BRANCH: - if (unlikely(nentries < 2)) - err = MDBX_CORRUPTED; - case P_LEAF: - case P_LEAF | P_LEAF2: - break; - } - } - - for (int i = 0; err == MDBX_SUCCESS && i < nentries; - 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); - const size_t over_payload = node_ds(node); - const size_t over_header = PAGEHDRSZ; - npages = 1; - - MDBX_page *op; - err = mdbx_page_get(ctx->mw_cursor, large_pgno, &op, NULL, - pp_txnid4chk(mp, ctx->mw_txn)); - if (err == MDBX_SUCCESS) - err = mdbx_page_check(ctx->mw_cursor, op, 0); - if (err == MDBX_SUCCESS) { - /* 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 (P_OVERFLOW != op->mp_flags) - err = bad_page(mp, "wrong page type %d for large data", op->mp_flags); - else - npages = op->mp_pages; - } - - pagesize = pgno2bytes(ctx->mw_txn->mt_env, npages); - const size_t over_unused = pagesize - over_payload - over_header; - rc = ctx->mw_visitor(large_pgno, npages, ctx->mw_user, deep, name, - pagesize, MDBX_page_large, err, 1, over_payload, - over_header, over_unused); - if (unlikely(rc != MDBX_SUCCESS)) - return (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc; - } break; - - case F_SUBDATA /* sub-db */: { - const size_t namelen = node_ks(node); - payload_size += node_ds(node); - if (unlikely(namelen == 0 || node_ds(node) != sizeof(MDBX_db))) - err = MDBX_CORRUPTED; - } break; - - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: - payload_size += sizeof(MDBX_db); - if (unlikely(node_ds(node) != sizeof(MDBX_db))) - err = MDBX_CORRUPTED; - break; - - case F_DUPDATA /* short sub-page */: { - if (unlikely(node_ds(node) <= PAGEHDRSZ)) { - err = MDBX_CORRUPTED; - break; - } - - 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: - subtype = MDBX_subpage_broken; - err = MDBX_CORRUPTED; - } - - for (int j = 0; err == MDBX_SUCCESS && 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)) - err = MDBX_CORRUPTED; - } - } - - rc = ctx->mw_visitor(pgno, 0, ctx->mw_user, deep + 1, name, node_ds(node), - subtype, err, nsubkeys, subpayload_size, - subheader_size, subunused_size + subalign_bytes); - if (unlikely(rc != MDBX_SUCCESS)) - return (rc == MDBX_RESULT_TRUE) ? MDBX_SUCCESS : rc; - header_size += subheader_size; - unused_size += subunused_size; - payload_size += subpayload_size; - align_bytes += subalign_bytes; - } break; - - default: - err = MDBX_CORRUPTED; - } - } - - rc = ctx->mw_visitor(pgno, 1, ctx->mw_user, deep, name, - ctx->mw_txn->mt_env->me_psize, type, err, nentries, - 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; err == MDBX_SUCCESS && i < nentries; i++) { - if (type == MDBX_page_dupfixed_leaf) - continue; - - MDBX_node *node = page_node(mp, i); - if (type == MDBX_page_branch) { - err = mdbx_walk_tree(ctx, node_pgno(node), name, deep + 1, - pp_txnid4chk(mp, ctx->mw_txn)); - if (unlikely(err != MDBX_SUCCESS)) { - if (err == MDBX_RESULT_TRUE) - break; - return err; - } - 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))) { - err = MDBX_CORRUPTED; - break; - } - - char namebuf_onstask[64]; - char *const sub_name = (namelen < sizeof(namebuf_onstask)) - ? namebuf_onstask - : mdbx_malloc(namelen + 1); - if (sub_name) { - memcpy(sub_name, node_key(node), namelen); - sub_name[namelen] = 0; - memcpy(&db, node_data(node), sizeof(db)); - err = mdbx_walk_sdb(ctx, &db, sub_name, deep + 1); - if (sub_name != namebuf_onstask) - mdbx_free(sub_name); - } else { - err = MDBX_ENOMEM; - } - } break; - - case F_SUBDATA | F_DUPDATA /* dupsorted sub-tree */: - if (unlikely(node_ds(node) != sizeof(MDBX_db) || - ctx->mw_cursor->mc_xcursor == NULL)) - err = MDBX_CORRUPTED; - else { - memcpy(&db, node_data(node), sizeof(db)); - assert(ctx->mw_cursor->mc_xcursor == - &container_of(ctx->mw_cursor, MDBX_cursor_couple, outer)->inner); - ctx->mw_cursor = &ctx->mw_cursor->mc_xcursor->mx_cursor; - err = mdbx_walk_tree(ctx, db.md_root, name, deep + 1, - pp_txnid4chk(mp, ctx->mw_txn)); - MDBX_xcursor *inner_xcursor = - container_of(ctx->mw_cursor, MDBX_xcursor, mx_cursor); - MDBX_cursor_couple *couple = - container_of(inner_xcursor, MDBX_cursor_couple, inner); - ctx->mw_cursor = &couple->outer; - } - break; - } - } - - return MDBX_SUCCESS; -} - -static __cold int mdbx_walk_sdb(mdbx_walk_ctx_t *ctx, MDBX_db *const db, - const char *name, int deep) { - if (unlikely(db->md_root == P_INVALID)) - return MDBX_SUCCESS; /* empty db */ - - MDBX_cursor_couple couple; - MDBX_dbx dbx = {.md_klen_min = INT_MAX}; - uint8_t dbistate = DBI_VALID | DBI_AUDITED; - int rc = mdbx_couple_init(&couple, ~0u, ctx->mw_txn, db, &dbx, &dbistate); - if (unlikely(rc != MDBX_SUCCESS)) - return rc; - - if (ctx->mw_dont_check_keys_ordering) { - couple.outer.mc_flags |= C_SKIPORD; - couple.inner.mx_cursor.mc_flags |= C_SKIPORD; - } - couple.outer.mc_next = ctx->mw_cursor; - ctx->mw_cursor = &couple.outer; - rc = mdbx_walk_tree(ctx, db->md_root, name, deep, ctx->mw_txn->mt_txnid); - ctx->mw_cursor = couple.outer.mc_next; - return rc; -} - -__cold int mdbx_env_pgwalk(MDBX_txn *txn, MDBX_pgvisitor_func *visitor, - void *user, bool dont_check_keys_ordering) { - 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_txn = txn; - ctx.mw_user = user; - ctx.mw_visitor = visitor; - ctx.mw_dont_check_keys_ordering = dont_check_keys_ordering; - - rc = visitor(0, NUM_METAS, user, 0, MDBX_PGWALK_META, - pgno2bytes(txn->mt_env, NUM_METAS), MDBX_page_meta, MDBX_SUCCESS, - 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_walk_sdb(&ctx, &txn->mt_dbs[FREE_DBI], MDBX_PGWALK_GC, 0); - if (!MDBX_IS_ERROR(rc)) - rc = mdbx_walk_sdb(&ctx, &txn->mt_dbs[MAIN_DBI], MDBX_PGWALK_MAIN, 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_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : MDBX_EBADSIGN; - - if (!(mc->mc_flags & C_INITIALIZED)) - return mc->mc_db->md_entries ? MDBX_RESULT_FALSE : MDBX_RESULT_TRUE; - - 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_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : MDBX_EBADSIGN; - - if (!(mc->mc_flags & C_INITIALIZED)) - return mc->mc_db->md_entries ? MDBX_RESULT_FALSE : MDBX_RESULT_TRUE; - - 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_LIVE)) - return (mc->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : 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; - unsigned 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(x->mc_signature != MDBX_MC_LIVE)) - return (x->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : MDBX_EBADSIGN; - - if (unlikely(y->mc_signature != MDBX_MC_LIVE)) - return (y->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : 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 = (ptrdiff_t)db->md_depth - 2 - (ptrdiff_t)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 & last->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_LIVE)) - return (cursor->mc_signature == MDBX_MC_READY4CLOSE) ? MDBX_EINVAL - : 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; - cursor_copy_internal(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; - cursor_copy_internal(&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); -} - -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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - 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 || - begin.outer.mc_dbx->md_cmp(begin_key, end_key) == 0)) { - /* 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_ex(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, - MDBX_val *new_data, MDBX_val *old_data, - MDBX_put_flags_t flags, MDBX_preserve_func preserver, - void *preserver_context) { - 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 | MDBX_RESERVE)) != MDBX_CURRENT)) - return MDBX_EINVAL; - - if (unlikely(!mdbx_txn_dbi_exists(txn, dbi, DBI_USRVALID))) - return MDBX_BAD_DBI; - - if (unlikely(flags & - ~(MDBX_NOOVERWRITE | MDBX_NODUPDATA | MDBX_ALLDUPS | - 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->tw.cursors[dbi]; - txn->tw.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; - } 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) { - /* disallow update/delete for multi-values */ - 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; - } - } - /* 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. */ - } - } - - if (IS_DIRTY(page)) { - if (new_data && cmp_lenfast(&present_data, new_data) == 0) { - /* если данные совпадают, то ничего делать не надо */ - *old_data = *new_data; - goto bailout; - } - rc = preserver ? preserver(preserver_context, old_data, - present_data.iov_base, present_data.iov_len) - : MDBX_SUCCESS; - if (unlikely(rc != MDBX_SUCCESS)) - goto bailout; - } else { - *old_data = present_data; - } - flags |= MDBX_CURRENT; - } - } - - if (likely(new_data)) - rc = mdbx_cursor_put(&cx.outer, key, new_data, flags); - else - rc = mdbx_cursor_del(&cx.outer, flags & MDBX_ALLDUPS); - -bailout: - txn->tw.cursors[dbi] = cx.outer.mc_next; - return rc; -} - -static int default_value_preserver(void *context, MDBX_val *target, - const void *src, size_t bytes) { - (void)context; - if (unlikely(target->iov_len < bytes)) { - target->iov_base = nullptr; - target->iov_len = bytes; - return MDBX_RESULT_TRUE; - } - memcpy(target->iov_base, src, target->iov_len = bytes); - return MDBX_SUCCESS; -} - -int mdbx_replace(MDBX_txn *txn, MDBX_dbi dbi, const MDBX_val *key, - MDBX_val *new_data, MDBX_val *old_data, - MDBX_put_flags_t flags) { - return mdbx_replace_ex(txn, dbi, key, new_data, old_data, flags, - default_value_preserver, nullptr); -} - -/* 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; - - 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)) { - if (txn->mt_flags & MDBX_TXN_RDONLY) - return MDBX_RESULT_FALSE; - - 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 | P_META))) - 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() - * вызывается после операции, в ходе которой грязная 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 режима WRITE_MAP режима 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, DBI_USRVALID))) - return MDBX_BAD_DBI; - - if (unlikely(TXN_DBI_CHANGED(txn, dbi))) - return MDBX_BAD_DBI; - - if (unlikely(txn->mt_dbistate[dbi] & DBI_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_TXN_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_dbistate[dbi] |= DBI_DIRTY; - } - - return MDBX_SUCCESS; -} - -/*----------------------------------------------------------------------------*/ - -__cold MDBX_NOTHROW_CONST_FUNCTION intptr_t mdbx_limits_pgsize_min(void) { - return __inline_mdbx_limits_pgsize_min(); -} - -__cold MDBX_NOTHROW_CONST_FUNCTION intptr_t mdbx_limits_pgsize_max(void) { - return __inline_mdbx_limits_pgsize_max(); -} - -__cold intptr_t mdbx_limits_dbsize_min(intptr_t pagesize) { - if (pagesize < 1) - pagesize = (intptr_t)mdbx_default_pagesize(); - 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_default_pagesize(); - else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - STATIC_ASSERT(MAX_MAPSIZE < INTPTR_MAX); - 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_default_pagesize(); - else if (unlikely(pagesize < (intptr_t)MIN_PAGESIZE || - pagesize > (intptr_t)MAX_PAGESIZE || - !is_powerof2((size_t)pagesize))) - return -1; - - STATIC_ASSERT(MAX_MAPSIZE < INTPTR_MAX); - const uint64_t limit = pagesize * (uint64_t)(MDBX_PGL_LIMIT - 1); - return (limit < (intptr_t)MAX_MAPSIZE) ? (intptr_t)limit - : (intptr_t)MAX_MAPSIZE; -} - -/*** Key-making functions to avoid custom comparators *************************/ - -static __always_inline double key2double(const int64_t key) { - union { - uint64_t u; - double f; - } casting; - - casting.u = (key < 0) ? key + UINT64_C(0x8000000000000000) - : UINT64_C(0xffffFFFFffffFFFF) - key; - return casting.f; -} - -static __always_inline uint64_t double2key(const double *const ptr) { - STATIC_ASSERT(sizeof(double) == sizeof(int64_t)); - const int64_t i = *(const int64_t *)ptr; - const uint64_t u = (i < 0) ? UINT64_C(0xffffFFFFffffFFFF) - i - : i + UINT64_C(0x8000000000000000); - if (mdbx_assert_enabled()) { - const double f = key2double(u); - assert(memcmp(&f, ptr, 8) == 0); - } - return u; -} - -static __always_inline float key2float(const int32_t key) { - union { - uint32_t u; - float f; - } casting; - - casting.u = - (key < 0) ? key + UINT32_C(0x80000000) : UINT32_C(0xffffFFFF) - key; - return casting.f; -} - -static __always_inline uint32_t float2key(const float *const ptr) { - STATIC_ASSERT(sizeof(float) == sizeof(int32_t)); - const int32_t i = *(const int32_t *)ptr; - const uint32_t u = - (i < 0) ? UINT32_C(0xffffFFFF) - i : i + UINT32_C(0x80000000); - if (mdbx_assert_enabled()) { - const float f = key2float(u); - assert(memcmp(&f, ptr, 4) == 0); - } - return u; -} - -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); -} - -MDBX_NOTHROW_CONST_FUNCTION uint64_t mdbx_key_from_int64(const int64_t i64) { - return __inline_mdbx_key_from_int64(i64); -} - -MDBX_NOTHROW_CONST_FUNCTION uint32_t mdbx_key_from_int32(const int32_t i32) { - return __inline_mdbx_key_from_int32(i32); -} - -#define IEEE754_DOUBLE_MANTISSA_SIZE 52 -#define IEEE754_DOUBLE_EXPONENTA_BIAS 0x3FF -#define IEEE754_DOUBLE_EXPONENTA_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 __inline 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 bias = 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_EXPONENTA_BIAS + IEEE754_DOUBLE_MANTISSA_SIZE - shift; - assert(exponent > 0 && exponent <= IEEE754_DOUBLE_EXPONENTA_MAX); - const uint64_t key = bias + (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_EXPONENTA_BIAS + IEEE754_DOUBLE_MANTISSA_SIZE - shift; - assert(exponent > 0 && exponent <= IEEE754_DOUBLE_EXPONENTA_MAX); - const uint64_t key = bias - 1 - (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 bias; -} - -int64_t mdbx_jsonInteger_from_key(const MDBX_val v) { - assert(v.iov_len == 8); - const uint64_t key = unaligned_peek_u64(2, v.iov_base); - const uint64_t bias = UINT64_C(0x8000000000000000); - const uint64_t covalent = (key > bias) ? key - bias : bias - key - 1; - const int shift = IEEE754_DOUBLE_EXPONENTA_BIAS + 63 - - (IEEE754_DOUBLE_EXPONENTA_MAX & - (int)(covalent >> IEEE754_DOUBLE_MANTISSA_SIZE)); - if (unlikely(shift < 1)) - return (key < bias) ? INT64_MIN : INT64_MAX; - if (unlikely(shift > 63)) - return 0; - - const uint64_t unscaled = ((covalent & IEEE754_DOUBLE_MANTISSA_MASK) - << (63 - IEEE754_DOUBLE_MANTISSA_SIZE)) + - bias; - const int64_t absolute = unscaled >> shift; - const int64_t value = (key < bias) ? -absolute : absolute; - assert(key == mdbx_key_from_jsonInteger(value) || - (mdbx_key_from_jsonInteger(value - 1) < key && - key < mdbx_key_from_jsonInteger(value + 1))); - return value; -} - -double mdbx_double_from_key(const MDBX_val v) { - assert(v.iov_len == 8); - return key2double(unaligned_peek_u64(2, v.iov_base)); -} - -float mdbx_float_from_key(const MDBX_val v) { - assert(v.iov_len == 4); - return key2float(unaligned_peek_u32(2, v.iov_base)); -} - -int32_t mdbx_int32_from_key(const MDBX_val v) { - assert(v.iov_len == 4); - return (int32_t)(unaligned_peek_u32(2, v.iov_base) - UINT32_C(0x80000000)); -} - -int64_t mdbx_int64_from_key(const MDBX_val v) { - assert(v.iov_len == 8); - return (int64_t)(unaligned_peek_u64(2, v.iov_base) - - UINT64_C(0x8000000000000000)); -} - -__cold MDBX_cmp_func *mdbx_get_keycmp(unsigned flags) { - return get_default_keycmp(flags); -} - -__cold MDBX_cmp_func *mdbx_get_datacmp(unsigned flags) { - return get_default_datacmp(flags); -} - -__cold int mdbx_env_set_option(MDBX_env *env, const MDBX_option_t option, - const uint64_t value) { - int err = check_env(env); - if (unlikely(err != MDBX_SUCCESS)) - return err; - - const bool lock_needed = (env->me_map && env->me_txn0 && - env->me_txn0->mt_owner != mdbx_thread_self()); - bool should_unlock = false; - switch (option) { - case MDBX_opt_sync_bytes: - if (unlikely(env->me_flags & MDBX_RDONLY)) - return MDBX_EACCESS; - if (unlikely(!env->me_autosync_threshold)) - return MDBX_EPERM; - if (sizeof(value) > sizeof(size_t) && unlikely(value != (size_t)value)) - return MDBX_TOO_LARGE; - if (atomic_store32(env->me_autosync_threshold, - bytes2pgno(env, (size_t)value + env->me_psize - 1), - mo_Relaxed) != 0) { - err = mdbx_env_sync_poll(env); - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } - break; - - case MDBX_opt_sync_period: - if (unlikely(env->me_flags & MDBX_RDONLY)) - return MDBX_EACCESS; - if (unlikely(!env->me_autosync_period)) - return MDBX_EPERM; - if (unlikely(value > UINT32_MAX)) - return MDBX_TOO_LARGE; - if (atomic_store64(env->me_autosync_period, - mdbx_osal_16dot16_to_monotime((uint32_t)value), - mo_Relaxed) != 0) { - err = mdbx_env_sync_poll(env); - if (unlikely(MDBX_IS_ERROR(err))) - return err; - } - break; - - case MDBX_opt_max_db: - if (unlikely(value > MDBX_MAX_DBI)) - return MDBX_EINVAL; - if (unlikely(env->me_map)) - return MDBX_EPERM; - env->me_maxdbs = (unsigned)value + CORE_DBS; - break; - - case MDBX_opt_max_readers: - if (unlikely(value < 1 || value > MDBX_READERS_LIMIT)) - return MDBX_EINVAL; - if (unlikely(env->me_map)) - return MDBX_EPERM; - env->me_maxreaders = (unsigned)value; - break; - - case MDBX_opt_dp_reserve_limit: - if (unlikely(value > INT_MAX)) - return MDBX_EINVAL; - if (env->me_options.dp_reserve_limit != (unsigned)value) { - if (lock_needed) { - err = mdbx_txn_lock(env, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - should_unlock = true; - } - env->me_options.dp_reserve_limit = (unsigned)value; - while (env->me_dp_reserve_len > env->me_options.dp_reserve_limit) { - mdbx_assert(env, env->me_dp_reserve != NULL); - MDBX_page *dp = env->me_dp_reserve; - ASAN_UNPOISON_MEMORY_REGION(dp, env->me_psize); - VALGRIND_MAKE_MEM_DEFINED(&dp->mp_next, sizeof(dp->mp_next)); - env->me_dp_reserve = dp->mp_next; - VALGRIND_MEMPOOL_FREE(env, dp); - mdbx_free(dp); - env->me_dp_reserve_len -= 1; - } - } - break; - - case MDBX_opt_rp_augment_limit: - if (unlikely(value > MDBX_PGL_LIMIT)) - return MDBX_EINVAL; - env->me_options.rp_augment_limit = (unsigned)value; - break; - - case MDBX_opt_txn_dp_limit: - case MDBX_opt_txn_dp_initial: - if (unlikely(value > MDBX_PGL_LIMIT || value < CURSOR_STACK * 4 || - value > bytes2pgno(env, env->me_dbgeo.upper) - NUM_METAS)) - return MDBX_EINVAL; - if (unlikely(env->me_txn0 == NULL)) - return MDBX_EACCESS; - if (lock_needed) { - err = mdbx_txn_lock(env, false); - if (unlikely(err != MDBX_SUCCESS)) - return err; - should_unlock = true; - } - if (env->me_txn) - err = MDBX_EPERM /* unable change during transaction */; - else { - mdbx_dpl_clear(env->me_txn0->tw.dirtylist); - const unsigned value32 = (unsigned)value; - if (option == MDBX_opt_txn_dp_initial && - env->me_options.dp_initial != value32) { - if (env->me_options.dp_limit < value32) - env->me_options.dp_limit = value32; - if (env->me_txn0->tw.dirtylist->allocated < value32 && - !mdbx_dpl_reserve(env->me_txn0, value32)) - err = MDBX_ENOMEM; - else - env->me_options.dp_initial = value32; - } - if (option == MDBX_opt_txn_dp_limit && - env->me_options.dp_limit != value32) { - if (env->me_txn0->tw.dirtylist->allocated > value32 && - !mdbx_dpl_reserve(env->me_txn0, value32)) - err = MDBX_ENOMEM; - else { - if (env->me_options.dp_initial > value32) - env->me_options.dp_initial = value32; - env->me_options.dp_limit = value32; - } - } - } - break; - - case MDBX_opt_spill_max_denominator: - if (unlikely(value > 255)) - return MDBX_EINVAL; - env->me_options.spill_max_denominator = (uint8_t)value; - break; - case MDBX_opt_spill_min_denominator: - if (unlikely(value > 255)) - return MDBX_EINVAL; - env->me_options.spill_min_denominator = (uint8_t)value; - break; - case MDBX_opt_spill_parent4child_denominator: - if (unlikely(value > 255)) - return MDBX_EINVAL; - env->me_options.spill_parent4child_denominator = (uint8_t)value; - break; - - case MDBX_opt_loose_limit: - if (unlikely(value > 255)) - return MDBX_EINVAL; - env->me_options.dp_loose_limit = (uint8_t)value; - break; - - default: - return MDBX_EINVAL; - } - - if (should_unlock) - mdbx_txn_unlock(env); - return err; -} - -__cold int mdbx_env_get_option(const MDBX_env *env, const MDBX_option_t option, - uint64_t *value) { - int err = check_env(env); - if (unlikely(err != MDBX_SUCCESS)) - return err; - if (unlikely(!value)) - return MDBX_EINVAL; - - switch (option) { - case MDBX_opt_sync_bytes: - if (unlikely(!env->me_autosync_threshold)) - return MDBX_EPERM; - *value = - pgno2bytes(env, atomic_load32(env->me_autosync_threshold, mo_Relaxed)); - break; - - case MDBX_opt_sync_period: - if (unlikely(!env->me_autosync_period)) - return MDBX_EPERM; - *value = mdbx_osal_monotime_to_16dot16( - atomic_load64(env->me_autosync_period, mo_Relaxed)); - break; - - case MDBX_opt_max_db: - *value = env->me_maxdbs - CORE_DBS; - break; - - case MDBX_opt_max_readers: - *value = env->me_maxreaders; - break; - - case MDBX_opt_dp_reserve_limit: - *value = env->me_options.dp_reserve_limit; - break; - - case MDBX_opt_rp_augment_limit: - *value = env->me_options.rp_augment_limit; - break; - - case MDBX_opt_txn_dp_limit: - *value = env->me_options.dp_limit; - break; - case MDBX_opt_txn_dp_initial: - *value = env->me_options.dp_initial; - break; - - case MDBX_opt_spill_max_denominator: - *value = env->me_options.spill_max_denominator; - break; - case MDBX_opt_spill_min_denominator: - *value = env->me_options.spill_min_denominator; - break; - case MDBX_opt_spill_parent4child_denominator: - *value = env->me_options.spill_parent4child_denominator; - break; - - case MDBX_opt_loose_limit: - *value = env->me_options.dp_loose_limit; - break; - - default: - return MDBX_EINVAL; - } - - return MDBX_SUCCESS; -} - -/*** 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, MDBX_put_flags_t 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, MDBX_put_flags_t 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, MDBX_put_flags_t 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_EBADSIGN; - - if (unlikely(!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))) - return MDBX_BAD_DBI; - - if (unlikely(txn->mt_flags & (MDBX_TXN_RDONLY | MDBX_TXN_BLOCKED))) - return (txn->mt_flags & MDBX_TXN_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->tw.cursors[dbi]; - txn->tw.cursors[dbi] = &cx.outer; - rc = mdbx_cursor_put_attr(&cx.outer, key, data, attr, 0); - txn->tw.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->tw.cursors[dbi]; - txn->tw.cursors[dbi] = &cx.outer; - rc = mdbx_cursor_put_attr(&cx.outer, key, data ? data : &old_data, attr, - MDBX_CURRENT); - txn->tw.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 struct 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) - " 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_ENV_CHECKPID=" MDBX_ENV_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 - " MDBX_ENABLE_REFUND=" STRINGIFY(MDBX_ENABLE_REFUND) -#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)" -#ifdef _MSC_VER -#pragma message("warning: Build flags undefined. Please use correct build script") -#else -#warning "Build flags undefined. Please use correct build script" -#endif // _MSC_VER -#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 */ -/* https://en.wikipedia.org/wiki/Operating_system_abstraction_layer */ - -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru> - * 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 - * <http://www.OpenLDAP.org/license.html>. - */ - - -#if defined(_WIN32) || defined(_WIN64) - -#include <winioctl.h> - -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 <wdm.h> and <ntifs.h> - * 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 STATUS_NOT_SUPPORTED -#define STATUS_NOT_SUPPORTED ((NTSTATUS)0xC00000BBL) -#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 defined(__UCLIBC__) -__extern_C void __assert(const char *, const char *, unsigned int, const char *) -#ifdef __THROW - __THROW -#else - __nothrow -#endif /* __THROW */ - MDBX_NORETURN; -#define __assert_fail(assertion, file, line, function) \ - __assert(assertion, file, line, function) - -#elif _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 */ - MDBX_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 - MDBX_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) MDBX_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 - MDBX_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 - -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 = "<troubles with assertion-message preparation>"; - 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 */ - -__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) ? "<troubles with panic-message preparation>" - : message; - -#if defined(_WIN32) || defined(_WIN64) - OutputDebugStringA("\r\nMDBX-PANIC: "); - OutputDebugStringA(const_message); - if (IsDebuggerPresent()) - DebugBreak(); - FatalExit(ERROR_UNHANDLED_ERROR); -#else -#if defined(__ANDROID_API__) - __android_log_assert("panic", "mdbx", "%s", const_message); -#else - __assert_fail(const_message, "mdbx", 0, "panic"); -#endif /* __ANDROID_API__ */ - 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, 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_condpair_init(mdbx_condpair_t *condpair) { - int rc; - memset(condpair, 0, sizeof(mdbx_condpair_t)); -#if defined(_WIN32) || defined(_WIN64) - if ((condpair->mutex = CreateMutexW(NULL, FALSE, NULL)) == NULL) { - rc = GetLastError(); - goto bailout_mutex; - } - if ((condpair->event[0] = CreateEventW(NULL, FALSE, FALSE, NULL)) == NULL) { - rc = GetLastError(); - goto bailout_event; - } - if ((condpair->event[1] = CreateEventW(NULL, FALSE, FALSE, NULL)) != NULL) - return MDBX_SUCCESS; - - rc = GetLastError(); - (void)CloseHandle(condpair->event[0]); -bailout_event: - (void)CloseHandle(condpair->mutex); -#else - rc = pthread_mutex_init(&condpair->mutex, NULL); - if (unlikely(rc != 0)) - goto bailout_mutex; - rc = pthread_cond_init(&condpair->cond[0], NULL); - if (unlikely(rc != 0)) - goto bailout_cond; - rc = pthread_cond_init(&condpair->cond[1], NULL); - if (likely(rc == 0)) - return MDBX_SUCCESS; - - (void)pthread_cond_destroy(&condpair->cond[0]); -bailout_cond: - (void)pthread_mutex_destroy(&condpair->mutex); -#endif -bailout_mutex: - memset(condpair, 0, sizeof(mdbx_condpair_t)); - return rc; -} - -MDBX_INTERNAL_FUNC int mdbx_condpair_destroy(mdbx_condpair_t *condpair) { -#if defined(_WIN32) || defined(_WIN64) - int rc = CloseHandle(condpair->mutex) ? MDBX_SUCCESS : GetLastError(); - rc = CloseHandle(condpair->event[0]) ? rc : GetLastError(); - rc = CloseHandle(condpair->event[1]) ? rc : GetLastError(); -#else - int err, rc = pthread_mutex_destroy(&condpair->mutex); - rc = (err = pthread_cond_destroy(&condpair->cond[0])) ? err : rc; - rc = (err = pthread_cond_destroy(&condpair->cond[1])) ? err : rc; -#endif - memset(condpair, 0, sizeof(mdbx_condpair_t)); - return rc; -} - -MDBX_INTERNAL_FUNC int mdbx_condpair_lock(mdbx_condpair_t *condpair) { -#if defined(_WIN32) || defined(_WIN64) - DWORD code = WaitForSingleObject(condpair->mutex, INFINITE); - return waitstatus2errcode(code); -#else - return pthread_mutex_lock(&condpair->mutex); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_condpair_unlock(mdbx_condpair_t *condpair) { -#if defined(_WIN32) || defined(_WIN64) - return ReleaseMutex(condpair->mutex) ? MDBX_SUCCESS : GetLastError(); -#else - return pthread_mutex_unlock(&condpair->mutex); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_condpair_signal(mdbx_condpair_t *condpair, - bool part) { -#if defined(_WIN32) || defined(_WIN64) - return SetEvent(condpair->event[part]) ? MDBX_SUCCESS : GetLastError(); -#else - return pthread_cond_signal(&condpair->cond[part]); -#endif -} - -MDBX_INTERNAL_FUNC int mdbx_condpair_wait(mdbx_condpair_t *condpair, - bool part) { -#if defined(_WIN32) || defined(_WIN64) - DWORD code = SignalObjectAndWait(condpair->mutex, condpair->event[part], - INFINITE, FALSE); - if (code == WAIT_OBJECT_0) { - code = WaitForSingleObject(condpair->mutex, INFINITE); - if (code == WAIT_OBJECT_0) - return MDBX_SUCCESS; - } - return waitstatus2errcode(code); -#else - return pthread_cond_wait(&condpair->cond[part], &condpair->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) - __try { - EnterCriticalSection(fastmutex); - } __except ( - (GetExceptionCode() == - 0xC0000194 /* STATUS_POSSIBLE_DEADLOCK / EXCEPTION_POSSIBLE_DEADLOCK */) - ? EXCEPTION_EXECUTE_HANDLER - : EXCEPTION_CONTINUE_SEARCH) { - return ERROR_POSSIBLE_DEADLOCK; - } - 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 -} - -#if !(defined(_WIN32) || defined(_WIN64)) -static bool is_valid_fd(int fd) { return !(isatty(fd) < 0 && errno == EBADF); } -#endif /*! Windows */ - -MDBX_INTERNAL_FUNC int mdbx_removedirectory(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 RemoveDirectoryW(pathnameW) ? MDBX_SUCCESS : GetLastError(); -#else - return rmdir(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, - mdbx_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; - case MDBX_OPEN_DELETE: - CreationDisposition = OPEN_EXISTING; - ShareMode |= FILE_SHARE_DELETE; - DesiredAccess = - FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES | DELETE | SYNCHRONIZE; - 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; - case MDBX_OPEN_DELETE: - flags = O_RDWR; - 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 */ - - /* Safeguard for https://github.com/erthink/libmdbx/issues/144 */ -#if STDIN_FILENO == 0 && STDOUT_FILENO == 1 && STDERR_FILENO == 2 - int stub_fd0 = -1, stub_fd1 = -1, stub_fd2 = -1; - static const char dev_null[] = "/dev/null"; - if (!is_valid_fd(STDIN_FILENO)) { - mdbx_warning("STD%s_FILENO/%d is invalid, open %s for temporary stub", "IN", - STDIN_FILENO, dev_null); - stub_fd0 = open(dev_null, O_RDONLY | O_NOCTTY); - } - if (!is_valid_fd(STDOUT_FILENO)) { - mdbx_warning("STD%s_FILENO/%d is invalid, open %s for temporary stub", - "OUT", STDOUT_FILENO, dev_null); - stub_fd1 = open(dev_null, O_WRONLY | O_NOCTTY); - } - if (!is_valid_fd(STDERR_FILENO)) { - mdbx_warning("STD%s_FILENO/%d is invalid, open %s for temporary stub", - "ERR", STDERR_FILENO, dev_null); - stub_fd2 = open(dev_null, O_WRONLY | O_NOCTTY); - } -#else -#error "Unexpected or unsupported UNIX or POSIX system" -#endif /* STDIN_FILENO == 0 && STDERR_FILENO == 2 */ - - *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 */ - - /* Safeguard for https://github.com/erthink/libmdbx/issues/144 */ -#if STDIN_FILENO == 0 && STDOUT_FILENO == 1 && STDERR_FILENO == 2 - if (*fd == STDIN_FILENO) { - mdbx_warning("Got STD%s_FILENO/%d, avoid using it by dup(fd)", "IN", - STDIN_FILENO); - assert(stub_fd0 == -1); - *fd = dup(stub_fd0 = *fd); - } - if (*fd == STDOUT_FILENO) { - mdbx_warning("Got STD%s_FILENO/%d, avoid using it by dup(fd)", "OUT", - STDOUT_FILENO); - assert(stub_fd1 == -1); - *fd = dup(stub_fd1 = *fd); - } - if (*fd == STDERR_FILENO) { - mdbx_warning("Got STD%s_FILENO/%d, avoid using it by dup(fd)", "ERR", - STDERR_FILENO); - assert(stub_fd2 == -1); - *fd = dup(stub_fd2 = *fd); - } - if (stub_fd0 != -1) - close(stub_fd0); - if (stub_fd1 != -1) - close(stub_fd1); - if (stub_fd2 != -1) - close(stub_fd2); - if (*fd >= STDIN_FILENO && *fd <= STDERR_FILENO) { - mdbx_error( - "Rejecting the use of a FD in the range " - "STDIN_FILENO/%d..STDERR_FILENO/%d to prevent database corruption", - STDIN_FILENO, STDERR_FILENO); - close(*fd); - return EBADF; - } -#else -#error "Unexpected or unsupported UNIX or POSIX system" -#endif /* STDIN_FILENO == 0 && STDERR_FILENO == 2 */ - - 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 - assert(fd > STDERR_FILENO); - 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_fsync(mdbx_filehandle_t fd, - enum mdbx_syncmode_bits mode_bits) { -#if defined(_WIN32) || defined(_WIN64) - if ((mode_bits & (MDBX_SYNC_DATA | MDBX_SYNC_IODQ)) && !FlushFileBuffers(fd)) - return GetLastError(); - return MDBX_SUCCESS; -#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 */ - - /* LY: This approach 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 */ - while (1) { - switch (mode_bits & (MDBX_SYNC_DATA | MDBX_SYNC_SIZE)) { - case MDBX_SYNC_NONE: - return MDBX_SUCCESS /* nothing to do */; -#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0 - case MDBX_SYNC_DATA: - if (fdatasync(fd) == 0) - return MDBX_SUCCESS; - break /* error */; -#if defined(__linux__) || defined(__gnu_linux__) - case MDBX_SYNC_SIZE: - if (mdbx_linux_kernel_version >= 0x03060000) - return MDBX_SUCCESS; - __fallthrough /* fall through */; -#endif /* Linux */ -#endif /* _POSIX_SYNCHRONIZED_IO > 0 */ - default: - if (fsync(fd) == 0) - return MDBX_SUCCESS; - } - - int rc = errno; - if (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, - enum mdbx_syncmode_bits mode_bits) { - uint8_t *ptr = (uint8_t *)map->address + offset; -#if defined(_WIN32) || defined(_WIN64) - if (!FlushViewOfFile(ptr, length)) - return GetLastError(); -#else -#if defined(__linux__) || defined(__gnu_linux__) - if (mode_bits == MDBX_SYNC_NONE && mdbx_linux_kernel_version > 0x02061300) - /* Since Linux 2.6.19, MS_ASYNC is in fact a no-op. The kernel properly - * tracks dirty pages and flushes them to storage as necessary. */ - return MDBX_SUCCESS; -#endif /* Linux */ - if (msync(ptr, length, (mode_bits & MDBX_SYNC_DATA) ? MS_SYNC : MS_ASYNC)) - return errno; - mode_bits &= ~MDBX_SYNC_DATA; -#endif - return mdbx_fsync(map->fd, mode_bits); -} - -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 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 && - rc != STATUS_NOT_SUPPORTED) - 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 mmapping. - * 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, const bool may_move) { - 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 && - /* workaround for Wine */ mdbx_NtExtendSection) { - /* growth rw-section */ - 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; - } - -retry_file_and_section: - /* 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 */; - - if (may_move) - /* the base address could be changed */ - map->address = NULL; - } - - 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 && may_move) { - /* 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; - ReservedSize = 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) - return MDBX_SUCCESS; - - if (limit < map->limit) { - /* unmap an excess at end of mapping. */ - if (unlikely(munmap(map->dxb + limit, map->limit - limit))) - return errno; - map->limit = limit; - return MDBX_SUCCESS; - } - - assert(limit > map->limit); - uint8_t *ptr = MAP_FAILED; - -#if defined(MREMAP_MAYMOVE) - ptr = mremap(map->address, map->limit, limit, may_move ? MREMAP_MAYMOVE : 0); - if (ptr == MAP_FAILED) { - const int err = errno; - switch (err) { - default: - return err; - case EAGAIN: - case ENOMEM: - return MDBX_UNABLE_EXTEND_MAPSIZE; - case EFAULT /* MADV_DODUMP / MADV_DONTDUMP are mixed for mmap-range */: - break; - } - } -#endif /* MREMAP_MAYMOVE */ - - const unsigned mmap_flags = - MAP_CONCEAL | MAP_SHARED | MAP_FILE | - (F_ISSET(flags, MDBX_UTTERLY_NOSYNC) ? MAP_NOSYNC : 0); - const unsigned mmap_prot = - (flags & MDBX_WRITEMAP) ? PROT_READ | PROT_WRITE : PROT_READ; - - if (ptr == MAP_FAILED) { - /* Try to mmap additional space beyond the end of mapping. */ - ptr = mmap(map->dxb + map->limit, limit - map->limit, mmap_prot, - mmap_flags -#if defined(MAP_FIXED_NOREPLACE) - | MAP_FIXED_NOREPLACE -#endif /* MAP_FIXED_NOREPLACE */ - , - map->fd, map->limit); - if (ptr == map->dxb + map->limit) - ptr = map->dxb; - else if (ptr != MAP_FAILED) { - /* the desired address is busy, unmap unsuitable one */ - if (unlikely(munmap(ptr, limit - map->limit))) - return errno; - ptr = MAP_FAILED; - } else { - const int err = errno; - switch (err) { - default: - return err; - case EAGAIN: - case ENOMEM: - return MDBX_UNABLE_EXTEND_MAPSIZE; - case EEXIST: /* address busy */ - case EINVAL: /* kernel don't support MAP_FIXED_NOREPLACE */ - break; - } - } - } - - if (ptr == MAP_FAILED) { - /* unmap and map again whole region */ - if (!may_move) { - /* TODO: Perhaps here it is worth to implement suspend/resume threads - * and perform unmap/map as like for Windows. */ - return MDBX_UNABLE_EXTEND_MAPSIZE; - } - - if (unlikely(munmap(map->address, map->limit))) - return errno; - - ptr = mmap(map->address, limit, mmap_prot, mmap_flags, map->fd, 0); - if (unlikely(ptr == MAP_FAILED)) { - ptr = mmap(map->address, map->limit, mmap_prot, mmap_flags, map->fd, 0); - if (unlikely(ptr == MAP_FAILED)) { - 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 mmapping. - * See https://github.com/erthink/libmdbx/pull/93#issuecomment-613687203 - */ - ASAN_UNPOISON_MEMORY_REGION(map->address, map->limit); - map->limit = 0; - map->current = 0; - map->address = nullptr; - return errno; - } - rc = MDBX_UNABLE_EXTEND_MAPSIZE; - limit = map->limit; - } - } - - assert(ptr && ptr != MAP_FAILED); - if (map->address != ptr) { - 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 mmapping. - * See https://github.com/erthink/libmdbx/pull/93#issuecomment-613687203 - */ - ASAN_UNPOISON_MEMORY_REGION(map->address, map->limit); - - VALGRIND_MAKE_MEM_DEFINED(ptr, map->current); - ASAN_UNPOISON_MEMORY_REGION(ptr, map->current); - 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 */ - -#endif /* POSIX / Windows */ - - 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 <mach/mach_time.h> -#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; -} - -static LSTATUS mdbx_RegGetValue(HKEY hKey, LPCSTR lpSubKey, LPCSTR lpValue, - PVOID pvData, LPDWORD pcbData) { - LSTATUS rc; - if (!mdbx_RegGetValueA) { - /* an old Windows 2000/XP */ - HKEY hSubKey; - rc = RegOpenKeyA(hKey, lpSubKey, &hSubKey); - if (rc == ERROR_SUCCESS) { - rc = RegQueryValueExA(hSubKey, lpValue, NULL, NULL, pvData, pcbData); - RegCloseKey(hSubKey); - } - return rc; - } - - rc = mdbx_RegGetValueA(hKey, lpSubKey, lpValue, RRF_RT_ANY, NULL, pvData, - pcbData); - if (rc != ERROR_FILE_NOT_FOUND) - return rc; - - rc = mdbx_RegGetValueA(hKey, lpSubKey, lpValue, - RRF_RT_ANY | 0x00010000 /* RRF_SUBKEY_WOW6464KEY */, - NULL, pvData, pcbData); - if (rc != ERROR_FILE_NOT_FOUND) - return rc; - return mdbx_RegGetValueA(hKey, lpSubKey, lpValue, - RRF_RT_ANY | 0x00020000 /* RRF_SUBKEY_WOW6432KEY */, - NULL, 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; - const int err = close(fd); - assert(err == 0); - (void)err; - 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", &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", &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", &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", &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", - &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", - &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; -} -/* This is CMake-template for libmdbx's version.c - ******************************************************************************/ - - -#if MDBX_VERSION_MAJOR != 0 || \ - MDBX_VERSION_MINOR != 9 -#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 struct MDBX_version_info mdbx_version = { - 0, - 9, - 2, - 136, - {"2021-01-30T02:28:12+03:00", "1ab2fa795a0dee8678b168ffcd961ca5a0fff7c5", "9f0ff865e860435b243d3d1e936e3067097a294f", - "v0.9.2-136-g9f0ff86"}, - 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; -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru> - * 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 - * <http://www.OpenLDAP.org/license.html>. - */ - -#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. */ - - -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 (MAX_PAGESIZE * NUM_METAS) -#define LCK_BODY_OFFSET LCK_META_LEN -#define LCK_BODY_LEN (LCK_MAXLEN - LCK_BODY_OFFSET) -#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 { - __try { - EnterCriticalSection(&env->me_windowsbug_lock); - } - __except ((GetExceptionCode() == - 0xC0000194 /* STATUS_POSSIBLE_DEADLOCK / EXCEPTION_POSSIBLE_DEADLOCK */) - ? EXCEPTION_EXECUTE_HANDLER - : EXCEPTION_CONTINUE_SEARCH) { - return ERROR_POSSIBLE_DEADLOCK; - } - } - - 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 */ - - /* transition 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) { - /* transition 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); -} - -MDBX_INTERNAL_FUNC int mdbx_lockfile(mdbx_filehandle_t fd, bool wait) { - return flock(fd, - wait ? LCK_EXCLUSIVE | LCK_WAITFOR - : LCK_EXCLUSIVE | LCK_DONTWAIT, - 0, LCK_MAXLEN) - ? MDBX_SUCCESS - : GetLastError(); -} - -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 + atomic_load32(&env->me_lck->mti_numreaders, mo_AcquireRelease); - 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.weak != env->me_pid || !reader->mr_tid.weak) { - skip_lck: - continue; - } - if (reader->mr_tid.weak == CurrentTid || - reader->mr_tid.weak == 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.weak == reader->mr_tid.weak) - goto skip_lck; - } - - rc = suspend_and_append(array, (mdbx_tid_t)reader->mr_tid.weak); - 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 through 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 description 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. - * - * 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 - * - * 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. - * - * The mdbx_lck_upgrade() moves the locking-FSM from "used" (i.e. shared) - * state to the "exclusive write" state. - */ - -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_WHOLE)) - ; - err = GetLastError(); - assert(err == ERROR_NOT_LOCKED || - (mdbx_RunningUnderWine() && err == ERROR_LOCK_VIOLATION)); - (void)err; - SetLastError(ERROR_SUCCESS); - } -} - -/* Seize state as 'exclusive-write' (E-E and returns MDBX_RESULT_TRUE) - * or as 'used' (S-? and returns MDBX_RESULT_FALSE). - * Otherwise 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), - * transition 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-write state (E-E) to used (S-?) */ - assert(env->me_lazy_fd != INVALID_HANDLE_VALUE); - assert(env->me_lfd != INVALID_HANDLE_VALUE); - - if (env->me_flags & MDBX_EXCLUSIVE) - return MDBX_SUCCESS /* nope since files were must be opened non-shareable */ - ; - /* 1) now at E-E (exclusive-write), transition 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()); - - /* 2) now at ?-E (middle), transition to S-E (locked) */ - if (!flock(env->me_lfd, LCK_SHARED | LCK_DONTWAIT, LCK_LOWER)) { - int rc = GetLastError() /* 3) something went wrong, give up */; - mdbx_error("%s, err %u", "?-E(middle) >> S-E(locked)", rc); - return rc; - } - - /* 4) 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 /* 5) now at S-? (used), done */; -} - -MDBX_INTERNAL_FUNC int mdbx_lck_upgrade(MDBX_env *env) { - /* Transite from used state (S-?) to exclusive-write (E-E) */ - assert(env->me_lfd != INVALID_HANDLE_VALUE); - - if (env->me_flags & MDBX_EXCLUSIVE) - return MDBX_SUCCESS /* nope since files were must be opened non-shareable */ - ; - - int rc; - /* 1) now on S-? (used), try S-E (locked) */ - mdbx_jitter4testing(false); - if (!flock(env->me_lfd, LCK_EXCLUSIVE | LCK_DONTWAIT, LCK_UPPER)) { - rc = GetLastError() /* 2) something went wrong, give up */; - mdbx_verbose("%s, err %u", "S-?(used) >> S-E(locked)", rc); - return rc; - } - - /* 3) now on S-E (locked), transition to ?-E (middle) */ - if (!funlock(env->me_lfd, LCK_LOWER)) - mdbx_panic("%s(%s) failed: err %u", __func__, "S-E(locked) >> ?-E(middle)", - GetLastError()); - - /* 4) now on ?-E (middle), try E-E (exclusive-write) */ - mdbx_jitter4testing(false); - if (!flock(env->me_lfd, LCK_EXCLUSIVE | LCK_DONTWAIT, LCK_LOWER)) { - rc = GetLastError() /* 5) something went wrong, give up */; - mdbx_verbose("%s, err %u", "?-E(middle) >> E-E(exclusive-write)", rc); - return rc; - } - - return MDBX_SUCCESS /* 6) now at E-E (exclusive-write), done */; -} - -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) { - /* 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) { - const bool synced = env->me_lck_mmap.lck->mti_unsynced_pages.weak == 0; - mdbx_munmap(&env->me_lck_mmap); - if (synced && !inprocess_neighbor && env->me_lfd != INVALID_HANDLE_VALUE && - mdbx_lck_upgrade(env) == MDBX_SUCCESS) - /* this will fail if LCK is used/mmapped by other process(es) */ - mdbx_ftruncate(env->me_lfd, 0); - } - lck_unlock(env); - return MDBX_SUCCESS; -} - -/*----------------------------------------------------------------------------*/ -/* 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 preempted). 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; -MDBX_RegGetValueA mdbx_RegGetValueA; -#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); - } - - const HINSTANCE hAdvapi32dll = GetModuleHandleA("advapi32.dll"); - GET_PROC_ADDR(hAdvapi32dll, RegGetValueA); - -#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 */ -/* - * Copyright 2015-2021 Leonid Yuriev <leo@yuriev.ru> - * 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 - * <http://www.OpenLDAP.org/license.html>. - */ - -#if !(defined(_WIN32) || defined(_WIN64)) /* !Windows LCK-implementation */ - -#include <sys/sem.h> - -/*----------------------------------------------------------------------------*/ -/* global constructor/destructor */ - -#if defined(__linux__) || defined(__gnu_linux__) - -#include <sys/utsname.h> - -#ifndef MDBX_ALLOY -uint32_t mdbx_linux_kernel_version; -bool mdbx_RunningOnWSL1; -#endif /* MDBX_ALLOY */ - -static __cold uint8_t probe_for_WSL(const char *tag) { - const char *const WSL = strstr(tag, "WSL"); - if (WSL && WSL[3] >= '2' && WSL[3] <= '9') - return WSL[3] - '0'; - const char *const wsl = strstr(tag, "wsl"); - if (wsl && wsl[3] >= '2' && wsl[3] <= '9') - return wsl[3] - '0'; - return (WSL || wsl || strcasestr(tag, "Microsoft")) ? 1 : 0; -} - -#endif /* Linux */ - -static __cold __attribute__((__constructor__)) void -mdbx_global_constructor(void) { -#if defined(__linux__) || defined(__gnu_linux__) - struct utsname buffer; - if (uname(&buffer) == 0) { - /* "Official" way of detecting WSL1 but not WSL2 - * https://github.com/Microsoft/WSL/issues/423#issuecomment-221627364 - * - * WARNING: False negative detection of WSL1 will result in DATA LOSS! - * So, the REQUIREMENTS for this code: - * 1. MUST detect WSL1 without false-negatives. - * 2. DESIRABLE detect WSL2 but without the risk of violating the first. */ - mdbx_RunningOnWSL1 = probe_for_WSL(buffer.version) == 1 || - probe_for_WSL(buffer.sysname) == 1 || - probe_for_WSL(buffer.release) == 1; - 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_lockfile(mdbx_filehandle_t fd, bool wait) { -#if MDBX_USE_OFDLOCKS - if (unlikely(op_setlk == 0)) - choice_fcntl(); -#endif /* MDBX_USE_OFDLOCKS */ - return lck_op(fd, wait ? op_setlkw : op_setlk, F_WRLCK, 0, OFF_T_MAX); -} - -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_RunningOnWSL1)) { - rc = ENOLCK /* No record locks available */; - mdbx_error("%s, err %u", - "WSL1 (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) { - const bool synced = env->me_lck_mmap.lck->mti_unsynced_pages.weak == 0; - mdbx_munmap(&env->me_lck_mmap); - if (synced) - 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 MDBX_LOCKING == MDBX_LOCKING_SYSV - int semid = -1; - /* don't initialize semaphores twice */ - (void)inprocess_neighbor; - if (global_uniqueness_flag == MDBX_RESULT_TRUE) { - 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 - (void)inprocess_neighbor; - if (global_uniqueness_flag != MDBX_RESULT_TRUE) - return MDBX_SUCCESS; -#error "FIXME: Not implemented" -#elif MDBX_LOCKING == MDBX_LOCKING_POSIX1988 - - /* don't initialize semaphores twice */ - (void)inprocess_neighbor; - 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 - if (inprocess_neighbor) - return MDBX_SUCCESS /* don't need any initialization for mutexes - if LCK already opened/used inside current process */ - ; - - /* 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_warning("%clock owner died, %s", (rlocked ? 'r' : 'w'), - (rc ? "this process' env is hosed" : "recovering")); - - int check_rc = mdbx_cleanup_dead_readers(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 -#ifdef _MSC_VER -#pragma message("warning: TODO") -#else -#warning "TODO" -#endif - (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 */ |