Release v0.3.12 (stable)

libfpta's important changes:

• Rewritting filters to actually hollow fpta_filter_none without open underlying cursor.
• Rewritting filters instead of returning FPTA_ETYPE.
• Resolved all warnings and build errors for all actual version of GCC and CLANG compilers.
• Fixed test for 32-bit builds.
• Refactoring fpta_name_refresh_filter() and related functions to avoid refresh-overhead.
• Resolved all UB shown by UBSAN, unclugin unaligned access.

libmdbx's important changes:

Backward compatibility break:

The database format signature has been changed to prevent
forward-interoperability with an previous releases, which may lead to a
false positive diagnosis of database corruption
due to flaws of an old library versions. This change is mostly invisible:

• previously versions are unable to read/write a new DBs;
• but the new release is able to handle an old DBs and will silently upgrade ones.

v0.11.2.22 at 2021-12-13:

• Fixed internal collision of MDBX_SHRINK_ALLOWED with MDBX_ACCEDE.
• Fixed returning MDBX_RESULT_TRUE (unexpected -1) from mdbx_env_set_option().
• Fixed extra assertion inside mdbx_cursor_put() for MDBX_DUPFIXED cases.
• Fixed mdbx_override_meta() to avoid false-positive assertions.

v0.11.2 at 2021-12-02:

• Fixed unexpected MDBX_PROBLEM error because of update an obsolete meta-page.
• Fixed returning MDBX_NOTFOUND error in case an inexact value found for MDBX_GET_BOTH operation.

v0.11.1 at 2021-10-23:

• Fixed unaligned access regression after the #pragma pack fix for modern compilers.
• Fixed possibility of meta-pages clashing after manually turn to a particular meta-page using mdbx_chk utility.

v0.10.4 at 2021-10-10:

• Fixed possibility of looping update GC during transaction commit (no public issue since the problem was discovered inside Positive Technologies).
• In debugging builds fixed a too small (single page) by default DB shrink threshold.

v0.10.3 at 2021-08-27:

• Always setup madvise while opening DB (fixes erthink/libmdbx#231).
• Fixed checking legacy P_DIRTY flag (0x10) for nested/sub-pages.

v0.10.2 at 2021-07-26:

• Allow to predefine/override MDBX_BUILD_TIMESTAMP for builds reproducibility.

• Avoided MDBX_TXN_FULL error for large transactions when possible.

• The MDBX_READERS_LIMIT increased to 32767.

• mdbx_chk now skips iteration & checking of DB' records if corresponding page-tree is corrupted (to avoid SIGSEGV, ASAN failures, etc).

• Added more checks for rare/fuzzing corruption cases.

• Fixed excess meta-pages checks in case mdbx_chk is called to check the DB for a specific meta page and thus could prevent switching to the selected meta page, even if the check passed without errors.

• Fixed recursive use of SRW-lock on Windows cause by MDBX_NOTLS option.

• Fixed log a warning during a new DB creation.

• Fixed false-negative mdbx_cursor_eof() result.

• Fixed make install with non-GNU install utility (OSX, BSD).

• Fixed installation by CMake in special cases by complete use GNUInstallDirs's variables.

• Fixed C++ Buffer issue with std::string and alignment.

• Fixed safe64_reset() for platforms without atomic 64-bit compare-and-swap.

• Fixed hang/shutdown on big-endian platforms without __cxa_thread_atexit().

• Fixed using bad meta-pages if DB was partially/recoverable corrupted.

• Fixed bootid generation on Windows for case of change system' time.

• Fixed test framework keygen-related issue.

v0.10.1 at 2021-06-01:

• Added -p option to mdbx_stat utility for printing page operations statistic.

• Added fallback from OFD locking to legacy non-OFD POSIX file locks on an EINVAL error.

• Added Plan 9 network file system to the whitelist for an ability to open a DB in exclusive mode.

• Support for opening from WSL2 environment a DB hosted on Windows drive and mounted via DrvFs (i.e by Plan 9 noted above).

• Fixed confusing/messy errors when build library from unfit github's archives (erthink/libmdbx#197).

• Fixed #​e​l​s​i​f typo.

• Fixed rare unexpected MDBX_PROBLEM error during altering data in huge transactions due to wrong spilling/oust of dirty pages (erthink/libmdbx#195).

• Re-Fixed WSL1/WSL2 detection with distinguishing (erthink/libmdbx#97).