mirror of
https://github.com/MariaDB/server.git
synced 2025-11-09 15:26:11 +01:00
173 lines
4.1 KiB
Text
173 lines
4.1 KiB
Text
/*****************************************************************************
|
|
|
|
Copyright (c) 1995, 2014, Oracle and/or its affiliates. All Rights Reserved.
|
|
Copyright (c) 2017, 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 as published by the Free Software
|
|
Foundation; version 2 of the License.
|
|
|
|
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 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 Street, Fifth Floor, Boston, MA 02110-1335 USA
|
|
|
|
*****************************************************************************/
|
|
|
|
/**************************************************//**
|
|
@file include/mtr0mtr.ic
|
|
Mini-transaction buffer
|
|
|
|
Created 11/26/1995 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#include "buf0buf.h"
|
|
|
|
/** Check if a mini-transaction is dirtying a clean page.
|
|
@return true if the mtr is dirtying a clean page. */
|
|
inline bool mtr_t::is_block_dirtied(const buf_block_t *block)
|
|
{
|
|
ut_ad(block->page.state() == BUF_BLOCK_FILE_PAGE);
|
|
ut_ad(block->page.buf_fix_count());
|
|
return block->page.oldest_modification() <= 1;
|
|
}
|
|
|
|
/**
|
|
Pushes an object to an mtr memo stack. */
|
|
void
|
|
mtr_t::memo_push(void* object, mtr_memo_type_t type)
|
|
{
|
|
ut_ad(is_active());
|
|
ut_ad(object != NULL);
|
|
ut_ad(type >= MTR_MEMO_PAGE_S_FIX);
|
|
ut_ad(type <= MTR_MEMO_SPACE_S_LOCK);
|
|
ut_ad(ut_is_2pow(type));
|
|
|
|
/* If this mtr has x-fixed a clean page then we set
|
|
the made_dirty flag. This tells us if we need to
|
|
grab log_sys.flush_order_mutex at mtr_t::commit() so that we
|
|
can insert the dirtied page into the flush list. */
|
|
|
|
if ((type == MTR_MEMO_PAGE_X_FIX || type == MTR_MEMO_PAGE_SX_FIX)
|
|
&& !m_made_dirty) {
|
|
|
|
m_made_dirty = is_block_dirtied(
|
|
reinterpret_cast<const buf_block_t*>(object));
|
|
}
|
|
|
|
mtr_memo_slot_t* slot = m_memo.push<mtr_memo_slot_t*>(sizeof(*slot));
|
|
|
|
slot->type = type;
|
|
slot->object = object;
|
|
}
|
|
|
|
/**
|
|
Releases the (index tree) s-latch stored in an mtr memo after a
|
|
savepoint. */
|
|
void
|
|
mtr_t::release_s_latch_at_savepoint(
|
|
ulint savepoint,
|
|
index_lock* lock)
|
|
{
|
|
ut_ad(is_active());
|
|
ut_ad(m_memo.size() > savepoint);
|
|
|
|
mtr_memo_slot_t* slot = m_memo.at<mtr_memo_slot_t*>(savepoint);
|
|
|
|
ut_ad(slot->object == lock);
|
|
ut_ad(slot->type == MTR_MEMO_S_LOCK);
|
|
|
|
lock->s_unlock();
|
|
|
|
slot->object = NULL;
|
|
}
|
|
|
|
/**
|
|
SX-latches the not yet latched block after a savepoint. */
|
|
|
|
void
|
|
mtr_t::sx_latch_at_savepoint(
|
|
ulint savepoint,
|
|
buf_block_t* block)
|
|
{
|
|
ut_ad(is_active());
|
|
ut_ad(m_memo.size() > savepoint);
|
|
|
|
ut_ad(!memo_contains_flagged(
|
|
block,
|
|
MTR_MEMO_PAGE_S_FIX
|
|
| MTR_MEMO_PAGE_X_FIX
|
|
| MTR_MEMO_PAGE_SX_FIX));
|
|
|
|
mtr_memo_slot_t* slot = m_memo.at<mtr_memo_slot_t*>(savepoint);
|
|
|
|
ut_ad(slot->object == block);
|
|
|
|
/* == RW_NO_LATCH */
|
|
ut_a(slot->type == MTR_MEMO_BUF_FIX);
|
|
|
|
block->lock.u_lock();
|
|
|
|
if (!m_made_dirty) {
|
|
m_made_dirty = is_block_dirtied(block);
|
|
}
|
|
|
|
slot->type = MTR_MEMO_PAGE_SX_FIX;
|
|
}
|
|
|
|
/**
|
|
X-latches the not yet latched block after a savepoint. */
|
|
|
|
void
|
|
mtr_t::x_latch_at_savepoint(
|
|
ulint savepoint,
|
|
buf_block_t* block)
|
|
{
|
|
ut_ad(is_active());
|
|
ut_ad(m_memo.size() > savepoint);
|
|
|
|
ut_ad(!memo_contains_flagged(
|
|
block,
|
|
MTR_MEMO_PAGE_S_FIX
|
|
| MTR_MEMO_PAGE_X_FIX
|
|
| MTR_MEMO_PAGE_SX_FIX));
|
|
|
|
mtr_memo_slot_t* slot = m_memo.at<mtr_memo_slot_t*>(savepoint);
|
|
|
|
ut_ad(slot->object == block);
|
|
|
|
/* == RW_NO_LATCH */
|
|
ut_a(slot->type == MTR_MEMO_BUF_FIX);
|
|
|
|
block->lock.x_lock();
|
|
|
|
if (!m_made_dirty) {
|
|
m_made_dirty = is_block_dirtied(block);
|
|
}
|
|
|
|
slot->type = MTR_MEMO_PAGE_X_FIX;
|
|
}
|
|
|
|
/**
|
|
Releases the block in an mtr memo after a savepoint. */
|
|
|
|
void
|
|
mtr_t::release_block_at_savepoint(
|
|
ulint savepoint,
|
|
buf_block_t* block)
|
|
{
|
|
ut_ad(is_active());
|
|
|
|
mtr_memo_slot_t* slot = m_memo.at<mtr_memo_slot_t*>(savepoint);
|
|
|
|
ut_a(slot->object == block);
|
|
|
|
buf_page_release_latch(block, slot->type);
|
|
|
|
reinterpret_cast<buf_block_t*>(block)->unfix();
|
|
|
|
slot->object = NULL;
|
|
}
|