MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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Marko Mäkelä 638c62acac MDEV-34983: Remove x86 asm from InnoDB
Starting with GCC 7 and clang 15, single-bit operations such as
fetch_or(1) & 1 are translated into 80386 instructions such as
LOCK BTS, instead of using the generic translation pattern
of emitting a loop around LOCK CMPXCHG.

Given that the oldest currently supported GNU/Linux distributions
ship GCC 7, and that older versions of GCC are out of support,
let us remove some work-arounds that are not strictly necessary.
If someone compiles the code using an older compiler, it will work
but possibly less efficiently.

srw_mutex_impl::HOLDER: Changed from 1U<<31 to 1 in order to
work around https://github.com/llvm/llvm-project/issues/37322
which is specific to setting the most significant bit.

srw_mutex_impl::WAITER: A multiplier of waiting requests.
This used to be 1, which would now collide with HOLDER.

fil_space_t::set_stopping(): Remove this unused function.

In MSVC we need _interlockedbittestandset() for LOCK BTS.
2024-09-23 12:51:27 +03:00
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MariaDB: The innovative open source database

MariaDB was designed as a drop-in replacement of MySQL(R) with more features, new storage engines, fewer bugs, and better performance.

MariaDB is brought to you by the MariaDB Foundation and the MariaDB Corporation. Please read the CREDITS file for details about the MariaDB Foundation, and who is developing MariaDB.

MariaDB is developed by many of the original developers of MySQL who now work for the MariaDB Corporation, the MariaDB Foundation and by many people in the community.

MySQL, which is the base of MariaDB, is a product and trademark of Oracle Corporation, Inc. For a list of developers and other contributors, see the Credits appendix. You can also run 'SHOW authors' to get a list of active contributors.

A description of the MariaDB project and a manual can be found at:

https://mariadb.org

https://mariadb.com/kb/en/

https://mariadb.com/kb/en/mariadb-vs-mysql-features/

https://mariadb.com/kb/en/mariadb-versus-mysql-compatibility/

https://mariadb.com/kb/en/new-and-old-releases/

Getting the code, building it and testing it

Refer to the following guide: https://mariadb.org/get-involved/getting-started-for-developers/get-code-build-test/ which outlines how to build the source code correctly and run the MariaDB testing framework, as well as which branch to target for your contributions.

Help

More help is available from the Maria Discuss mailing list https://lists.mariadb.org/postorius/lists/discuss.lists.mariadb.org/ and MariaDB's Zulip instance, https://mariadb.zulipchat.com/

Licensing


MariaDB is specifically available only under version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.) This is inherited from MySQL. Please see the README file in the MySQL distribution for more information.

License information can be found in the COPYING file. Third party license information can be found in the THIRDPARTY file.


Bug Reports

Bug and/or error reports regarding MariaDB should be submitted at: https://jira.mariadb.org

For reporting security vulnerabilities see: https://mariadb.org/about/security-policy/

The code for MariaDB, including all revision history, can be found at: https://github.com/MariaDB/server