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Viewing changes to storage/innobase/include/buf0flu.ic

  • Committer: Bazaar Package Importer
  • Author(s): Norbert Tretkowski
  • Date: 2010-03-17 14:56:02 UTC
  • Revision ID: james.westby@ubuntu.com-20100317145602-x7e30l1b2sb5s6w6
Tags: upstream-5.1.45
Import upstream version 5.1.45

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storage/innobase/include/buf0flu.ic
 
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/******************************************************
 
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The database buffer pool flush algorithm
 
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(c) 1995 Innobase Oy
 
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Created 11/5/1995 Heikki Tuuri
 
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*******************************************************/
 
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#include "buf0buf.h"
 
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#include "mtr0mtr.h"
 
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/************************************************************************
 
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Inserts a modified block into the flush list. */
 
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void
 
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buf_flush_insert_into_flush_list(
 
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/*=============================*/
 
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        buf_block_t*    block); /* in: block which is modified */
 
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/************************************************************************
 
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Inserts a modified block into the flush list in the right sorted position.
 
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This function is used by recovery, because there the modifications do not
 
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necessarily come in the order of lsn's. */
 
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void
 
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buf_flush_insert_sorted_into_flush_list(
 
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/*====================================*/
 
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        buf_block_t*    block); /* in: block which is modified */
 
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/************************************************************************
 
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This function should be called at a mini-transaction commit, if a page was
 
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modified in it. Puts the block to the list of modified blocks, if it is not
 
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already in it. */
 
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UNIV_INLINE
 
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void
 
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buf_flush_note_modification(
 
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/*========================*/
 
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        buf_block_t*    block,  /* in: block which is modified */
 
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        mtr_t*          mtr)    /* in: mtr */
 
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{
 
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        ut_ad(block);
 
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        ut_ad(block->state == BUF_BLOCK_FILE_PAGE);
 
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        ut_ad(block->buf_fix_count > 0);
 
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#ifdef UNIV_SYNC_DEBUG
 
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        ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
 
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#endif /* UNIV_SYNC_DEBUG */
 
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        ut_ad(mutex_own(&(buf_pool->mutex)));
 
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        ut_ad(ut_dulint_cmp(mtr->start_lsn, ut_dulint_zero) != 0);
 
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        ut_ad(mtr->modifications);
 
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        ut_ad(ut_dulint_cmp(block->newest_modification, mtr->end_lsn) <= 0);
 
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        block->newest_modification = mtr->end_lsn;
 
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        if (ut_dulint_is_zero(block->oldest_modification)) {
 
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                block->oldest_modification = mtr->start_lsn;
 
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                ut_ad(!ut_dulint_is_zero(block->oldest_modification));
 
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                buf_flush_insert_into_flush_list(block);
 
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        } else {
 
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                ut_ad(ut_dulint_cmp(block->oldest_modification,
 
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                                    mtr->start_lsn) <= 0);
 
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        }
 
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        ++srv_buf_pool_write_requests;
 
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}
 
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/************************************************************************
 
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This function should be called when recovery has modified a buffer page. */
 
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UNIV_INLINE
 
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void
 
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buf_flush_recv_note_modification(
 
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/*=============================*/
 
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        buf_block_t*    block,          /* in: block which is modified */
 
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        dulint          start_lsn,      /* in: start lsn of the first mtr in a
 
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                                        set of mtr's */
 
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        dulint          end_lsn)        /* in: end lsn of the last mtr in the
 
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                                        set of mtr's */
 
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{
 
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        ut_ad(block);
 
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        ut_ad(block->state == BUF_BLOCK_FILE_PAGE);
 
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        ut_ad(block->buf_fix_count > 0);
 
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#ifdef UNIV_SYNC_DEBUG
 
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        ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
 
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#endif /* UNIV_SYNC_DEBUG */
 
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        mutex_enter(&(buf_pool->mutex));
 
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        ut_ad(ut_dulint_cmp(block->newest_modification, end_lsn) <= 0);
 
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        block->newest_modification = end_lsn;
 
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        if (ut_dulint_is_zero(block->oldest_modification)) {
 
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                block->oldest_modification = start_lsn;
 
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                ut_ad(!ut_dulint_is_zero(block->oldest_modification));
 
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                buf_flush_insert_sorted_into_flush_list(block);
 
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        } else {
 
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                ut_ad(ut_dulint_cmp(block->oldest_modification,
 
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                                    start_lsn) <= 0);
 
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        }
 
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        mutex_exit(&(buf_pool->mutex));
 
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}