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/*****************************************************************************
Copyright (c) 1995, 2015, Oracle and/or its affiliates. All Rights Reserved.
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/buf0flu.ic
The database buffer pool flush algorithm
Created 11/5/1995 Heikki Tuuri
*******************************************************/
#include "buf0buf.h"
#include "mtr0mtr.h"
#include "srv0srv.h"
#include "fsp0types.h"
/********************************************************************//**
Inserts a modified block into the flush list. */
void
buf_flush_insert_into_flush_list(
/*=============================*/
buf_pool_t* buf_pool, /*!< buffer pool instance */
buf_block_t* block, /*!< in/out: block which is modified */
lsn_t lsn); /*!< in: oldest modification */
/********************************************************************//**
This function should be called at a mini-transaction commit, if a page was
modified in it. Puts the block to the list of modified blocks, if it is not
already in it. */
UNIV_INLINE
void
buf_flush_note_modification(
/*========================*/
buf_block_t* block, /*!< in: block which is modified */
lsn_t start_lsn, /*!< in: start lsn of the mtr that
modified this block */
lsn_t end_lsn, /*!< in: end lsn of the mtr that
modified this block */
FlushObserver* observer) /*!< in: flush observer */
{
mutex_enter(&block->mutex);
ut_ad(!srv_read_only_mode
|| fsp_is_system_temporary(block->page.id.space()));
ut_ad(buf_block_get_state(block) == BUF_BLOCK_FILE_PAGE);
ut_ad(block->page.buf_fix_count > 0);
ut_ad(block->page.newest_modification <= end_lsn);
block->page.newest_modification = end_lsn;
/* Don't allow to set flush observer from non-null to null,
or from one observer to another. */
ut_ad(block->page.flush_observer == NULL
|| block->page.flush_observer == observer);
block->page.flush_observer = observer;
if (block->page.oldest_modification == 0) {
buf_pool_t* buf_pool = buf_pool_from_block(block);
buf_flush_insert_into_flush_list(buf_pool, block, start_lsn);
} else {
ut_ad(block->page.oldest_modification <= start_lsn);
}
mutex_exit(&block->mutex);
srv_stats.buf_pool_write_requests.inc();
}
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