mirror of
https://github.com/MariaDB/server.git
synced 2025-08-05 01:51:36 +02:00
3c67d73aad
As noted in commit c36834c832
the MemorySanitizer instrumented builds so far only work with
the synchronous I/O interface (innodb_use_native_aio=OFF).
It is not that hard to make WITH_MSAN=ON work with the
Linux libaio, without even instrumenting that library itself.
aio_linux::getevent_thread_routine(): Declare the buffer that
is returned by my_getevents() as initialized. Declare
the data returned by a successful aio_opcode::AIO_PREAD as initialized.
Reviewed by: Daniel Black
73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/* Copyright (C) 2025 MariaDB Corporation.
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This program is free software; you can redistribute itand /or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 - 1301 USA*/
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/*
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This file exports create_linux_aio() function which is used to create
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an asynchronous IO implementation for Linux (currently either libaio or
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uring).
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*/
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#include "tpool.h"
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#include <stdio.h>
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namespace tpool
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{
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// Forward declarations of aio implementations
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#ifdef HAVE_LIBAIO
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// defined in aio_libaio.cc
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aio *create_libaio(thread_pool *pool, int max_io);
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#endif
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#if defined HAVE_URING
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// defined in aio_uring.cc
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aio *create_uring(thread_pool *pool, int max_io);
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#endif
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/*
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@brief
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Choose native linux aio implementation based on availability and user
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preference.
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@param pool - thread pool to use for aio operations
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@param max_io - maximum number of concurrent io operations
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@param impl - implementation to use, can be one of the following:
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@returns
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A pointer to the aio implementation object, or nullptr if no suitable
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implementation is available.
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If impl is OS_IO_DEFAULT, it will try uring first, fallback to libaio
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If impl is OS_IO_URING or OS_IO_LIBAIO, it won't fallback
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*/
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aio *create_linux_aio(thread_pool *pool, int max_io, aio_implementation impl)
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{
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#ifdef HAVE_URING
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if (impl != OS_IO_LIBAIO)
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{
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aio *ret= create_uring(pool, max_io);
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if (ret)
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return ret;
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else if (impl != OS_IO_DEFAULT)
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return nullptr; // uring is not available
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else
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fprintf(stderr, "create_uring failed: falling back to libaio\n");
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}
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#endif
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#ifdef HAVE_LIBAIO
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if (impl != OS_IO_URING)
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return create_libaio(pool, max_io);
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#endif
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return nullptr;
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}
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} // namespace tpool
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