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Diffstat (limited to 'storage/innobase/buf/buf0block_hint.cc')
-rw-r--r-- | storage/innobase/buf/buf0block_hint.cc | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/storage/innobase/buf/buf0block_hint.cc b/storage/innobase/buf/buf0block_hint.cc deleted file mode 100644 index 6bd01faa..00000000 --- a/storage/innobase/buf/buf0block_hint.cc +++ /dev/null @@ -1,59 +0,0 @@ -/***************************************************************************** - -Copyright (c) 2020, Oracle and/or its affiliates. All Rights Reserved. -Copyright (c) 2020, 2021, MariaDB Corporation. - -This program is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License, version 2.0, as published by the -Free Software Foundation. - -This program is also distributed with certain software (including but not -limited to OpenSSL) that is licensed under separate terms, as designated in a -particular file or component or in included license documentation. The authors -of MySQL hereby grant you an additional permission to link the program and -your derivative works with the separately licensed software that they have -included with MySQL. - -This program is distributed in the hope that it will be useful, but WITHOUT -ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0, -for more details. - -You should have received a copy of the GNU General Public License along with -this program; if not, write to the Free Software Foundation, Inc., -51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - -*****************************************************************************/ - -#include "buf0block_hint.h" -namespace buf { - -TRANSACTIONAL_TARGET -void Block_hint::buffer_fix_block_if_still_valid() -{ - /* To check if m_block belongs to the current buf_pool, we must - prevent freeing memory while we check, and until we buffer-fix the - block. For this purpose it is enough to latch any of the many - latches taken by buf_pool_t::resize(). - - Similar to buf_page_optimistic_get(), we must validate - m_block->page.id() after acquiring the hash_lock, because the object - may have been freed and not actually attached to buf_pool.page_hash - at the moment. (The block could have been reused to store a - different page, and that slice of buf_pool.page_hash could be protected - by another hash_lock that we are not holding.) - - Finally, we must ensure that the block is not being freed. */ - if (m_block) - { - auto &cell= buf_pool.page_hash.cell_get(m_page_id.fold()); - transactional_shared_lock_guard<page_hash_latch> g - {buf_pool.page_hash.lock_get(cell)}; - if (buf_pool.is_uncompressed(m_block) && m_page_id == m_block->page.id() && - m_block->page.frame && m_block->page.in_file()) - m_block->page.fix(); - else - clear(); - } -} -} // namespace buf |