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Viewing changes to storage/innobase/include/btr0sea.ic

  • Committer: brian
  • Date: 2008-06-25 05:29:13 UTC
  • Revision ID: brian@localhost.localdomain-20080625052913-6upwo0jsrl4lnapl
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storage/innobase/include/btr0sea.ic
 
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/************************************************************************
 
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The index tree adaptive search
 
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(c) 1996 Innobase Oy
 
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Created 2/17/1996 Heikki Tuuri
 
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*************************************************************************/
 
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#include "dict0mem.h"
 
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#include "btr0cur.h"
 
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#include "buf0buf.h"
 
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/*************************************************************************
 
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Updates the search info. */
 
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void
 
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btr_search_info_update_slow(
 
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/*========================*/
 
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        btr_search_t*   info,   /* in/out: search info */
 
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        btr_cur_t*      cursor);/* in: cursor which was just positioned */
 
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/************************************************************************
 
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Returns search info for an index. */
 
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UNIV_INLINE
 
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btr_search_t*
 
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btr_search_get_info(
 
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/*================*/
 
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                                /* out: search info; search mutex reserved */
 
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        dict_index_t*   index)  /* in: index */
 
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{
 
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        ut_ad(index);
 
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        return(index->search_info);
 
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}
 
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/*************************************************************************
 
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Updates the search info. */
 
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UNIV_INLINE
 
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void
 
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btr_search_info_update(
 
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/*===================*/
 
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        dict_index_t*   index,  /* in: index of the cursor */
 
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        btr_cur_t*      cursor) /* in: cursor which was just positioned */
 
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{
 
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        btr_search_t*   info;
 
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#ifdef UNIV_SYNC_DEBUG
 
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        ut_ad(!rw_lock_own(&btr_search_latch, RW_LOCK_SHARED));
 
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        ut_ad(!rw_lock_own(&btr_search_latch, RW_LOCK_EX));
 
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#endif /* UNIV_SYNC_DEBUG */
 
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        info = btr_search_get_info(index);
 
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        info->hash_analysis++;
 
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        if (info->hash_analysis < BTR_SEARCH_HASH_ANALYSIS) {
 
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                /* Do nothing */
 
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                return;
 
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        }
 
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        ut_ad(cursor->flag != BTR_CUR_HASH);
 
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        btr_search_info_update_slow(info, cursor);
 
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}