libmdbx: switch to original amalgamated source code (v0.9.1.18)

Amalgamated source code is the recommended form for
embedding libmdbx in non-CMake build systems. This amalgamated
version contains a minimum of files, is fully ready for use,
and make impossible a number of errors.

To upgrade or switch to a different version, just unpack
to the `src` subdirectory a corresponding `libmdbx-amalgamated-X_Y_Z.zip`
at the https://github.com/erthink/libmdbx/releases.

For instance, the https://github.com/erthink/libmdbx/releases/download/v0.9.2/libmdbx-amalgamated-0_9_2.zip
for the next release.

--

Minimal changes have been made to the build configuration:

1. For use the standard `DllMain()` entry of libmdbx:
   - added the `MDBX_BUILD_SHARED_LIBRARY=1` option;
   - removed the `MDBX_CONFIG_MANUAL_TLS_CALLBACK` option;
   - deleted the `miranda.c` file containing only `DllMain()`
     with the `mdbx_dll_handle()` call, now this is done by the library itself.

2. Removed refs to extra files (that missing in the amalgamated source code):
   - for building `libmdbx.dll` only the `mdbx.h` and `mdbx.c` are used,
     but not `mdbx.c++` for a C++ API;
   - for building the `mdbx_chk`, `mdbx_load`, and `mdbx_dump` utilities
     only it own sources are used.

--

Last libmdbx changes:

 - Fixed missing installation of `mdbx.h++`.
 - Fixed use of obsolete `__noreturn`.
 - Fixed use of `yield` instruction on ARM if unsupported.
 - Added pthread workaround for buggy toolchain/cmake/buildroot.
 - Fixed use of `pthread_yield()` for non-GLIBC.
 - Fixed use of `RegGetValueA()` on Windows 2000/XP.
 - Fixed use of `GetTickCount64()` on Windows 2000/XP.
 - Fixed opening DB on a network shares (in the exclusive mode).
 - Fixed copy&paste typos.
 - Fixed minor false-positive GCC warning.

1 files changed, 0 insertions, 91 deletions

diff --git a/libs/libmdbx/src/test/jitter.cc b/libs/libmdbx/src/test/jitter.cc
deleted file mode 100644
index 71d58699de..0000000000
--- a/libs/libmdbx/src/test/jitter.cc
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * Copyright 2017-2020 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>.
- */
-
-#include "test.h"
-
-bool testcase_jitter::run() {
-  int err;
-  size_t upper_limit = config.params.size_upper;
-  if (upper_limit < 1)
-    upper_limit = config.params.size_now * 2;
-
-  while (should_continue()) {
-    jitter_delay();
-    db_open();
-
-    if (upper_limit < 1) {
-      MDBX_envinfo info;
-      err = mdbx_env_info_ex(db_guard.get(), txn_guard.get(), &info,
-                             sizeof(info));
-      if (err)
-        failure_perror("mdbx_env_info_ex()", err);
-      upper_limit = (info.mi_geo.upper < INTPTR_MAX)
-                        ? (intptr_t)info.mi_geo.upper
-                        : INTPTR_MAX;
-    }
-
-    if (flipcoin()) {
-      jitter_delay();
-      txn_begin(true);
-      fetch_canary();
-      jitter_delay();
-      txn_end(flipcoin());
-    }
-
-    const bool coin4size = flipcoin();
-    jitter_delay();
-    txn_begin(mode_readonly());
-    jitter_delay();
-    if (!mode_readonly()) {
-      fetch_canary();
-      update_canary(1);
-      err = mdbx_env_set_geometry(
-          db_guard.get(), -1, -1,
-          coin4size ? upper_limit * 2 / 3 : upper_limit * 3 / 2, -1, -1, -1);
-      if (err != MDBX_SUCCESS && err != MDBX_UNABLE_EXTEND_MAPSIZE &&
-          err != MDBX_MAP_FULL && err != MDBX_TOO_LARGE)
-        failure_perror("mdbx_env_set_geometry-1", err);
-    }
-    txn_end(flipcoin());
-
-    err = mdbx_env_set_geometry(
-        db_guard.get(), -1, -1,
-        !coin4size ? upper_limit * 2 / 3 : upper_limit * 3 / 2, -1, -1, -1);
-    if (err != MDBX_SUCCESS && err != MDBX_UNABLE_EXTEND_MAPSIZE &&
-        err != MDBX_MAP_FULL && err != MDBX_TOO_LARGE)
-      failure_perror("mdbx_env_set_geometry-2", err);
-
-    if (flipcoin()) {
-      jitter_delay();
-      txn_begin(true);
-      jitter_delay();
-      txn_end(flipcoin());
-    }
-
-    jitter_delay();
-    err =
-        mdbx_env_set_geometry(db_guard.get(), -1, -1, upper_limit, -1, -1, -1);
-    if (err != MDBX_SUCCESS && err != MDBX_UNABLE_EXTEND_MAPSIZE &&
-        err != MDBX_MAP_FULL && err != MDBX_TOO_LARGE)
-      failure_perror("mdbx_env_set_geometry-3", err);
-
-    db_close();
-
-    /* just 'align' nops with other tests with batching */
-    const auto batching =
-        std::max(config.params.batch_read, config.params.batch_write);
-    report(std::max(1u, batching / 2));
-  }
-  return true;
-}