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/******************************************************
The database buffer pool flush algorithm
(c) 1995 Innobase Oy
Created 11/5/1995 Heikki Tuuri
*******************************************************/
#include "buf0buf.h"
#include "mtr0mtr.h"
/************************************************************************
Inserts a modified block into the flush list. */
void
buf_flush_insert_into_flush_list(
/*=============================*/
buf_block_t* block); /* in: block which is modified */
/************************************************************************
Inserts a modified block into the flush list in the right sorted position.
This function is used by recovery, because there the modifications do not
necessarily come in the order of lsn's. */
void
buf_flush_insert_sorted_into_flush_list(
/*====================================*/
buf_block_t* block); /* in: block which is modified */
/************************************************************************
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 */
mtr_t* mtr) /* in: mtr */
{
ut_ad(block);
ut_ad(block->state == BUF_BLOCK_FILE_PAGE);
ut_ad(block->buf_fix_count > 0);
#ifdef UNIV_SYNC_DEBUG
ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
ut_ad(mutex_own(&(buf_pool->mutex)));
#endif /* UNIV_SYNC_DEBUG */
ut_ad(ut_dulint_cmp(mtr->start_lsn, ut_dulint_zero) != 0);
ut_ad(mtr->modifications);
ut_ad(ut_dulint_cmp(block->newest_modification, mtr->end_lsn) <= 0);
block->newest_modification = mtr->end_lsn;
if (ut_dulint_is_zero(block->oldest_modification)) {
block->oldest_modification = mtr->start_lsn;
ut_ad(!ut_dulint_is_zero(block->oldest_modification));
buf_flush_insert_into_flush_list(block);
} else {
ut_ad(ut_dulint_cmp(block->oldest_modification,
mtr->start_lsn) <= 0);
}
++srv_buf_pool_write_requests;
}
/************************************************************************
This function should be called when recovery has modified a buffer page. */
UNIV_INLINE
void
buf_flush_recv_note_modification(
/*=============================*/
buf_block_t* block, /* in: block which is modified */
dulint start_lsn, /* in: start lsn of the first mtr in a
set of mtr's */
dulint end_lsn) /* in: end lsn of the last mtr in the
set of mtr's */
{
ut_ad(block);
ut_ad(block->state == BUF_BLOCK_FILE_PAGE);
ut_ad(block->buf_fix_count > 0);
#ifdef UNIV_SYNC_DEBUG
ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
#endif /* UNIV_SYNC_DEBUG */
mutex_enter(&(buf_pool->mutex));
ut_ad(ut_dulint_cmp(block->newest_modification, end_lsn) <= 0);
block->newest_modification = end_lsn;
if (ut_dulint_is_zero(block->oldest_modification)) {
block->oldest_modification = start_lsn;
ut_ad(!ut_dulint_is_zero(block->oldest_modification));
buf_flush_insert_sorted_into_flush_list(block);
} else {
ut_ad(ut_dulint_cmp(block->oldest_modification,
start_lsn) <= 0);
}
mutex_exit(&(buf_pool->mutex));
}
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