diff options
Diffstat (limited to 'storage/xtradb/include/buf0buf.h')
| -rw-r--r-- | storage/xtradb/include/buf0buf.h | 59 |
1 files changed, 20 insertions, 39 deletions
diff --git a/storage/xtradb/include/buf0buf.h b/storage/xtradb/include/buf0buf.h index 838dd7f3900..e3039fe520c 100644 --- a/storage/xtradb/include/buf0buf.h +++ b/storage/xtradb/include/buf0buf.h @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 1995, 2012, 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 @@ -11,8 +11,8 @@ 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., 59 Temple -Place, Suite 330, Boston, MA 02111-1307 USA +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA *****************************************************************************/ @@ -120,13 +120,11 @@ buf_pool_free(void); /*===============*/ /********************************************************************//** -Drops the adaptive hash index. To prevent a livelock, this function -is only to be called while holding btr_search_latch and while -btr_search_enabled == FALSE. */ +Clears the adaptive hash index on all pages in the buffer pool. */ UNIV_INTERN void -buf_pool_drop_hash_index(void); -/*==========================*/ +buf_pool_clear_hash_index(void); +/*===========================*/ /********************************************************************//** Relocate a buffer control block. Relocates the block on the LRU list @@ -372,15 +370,6 @@ buf_page_peek( /*==========*/ ulint space, /*!< in: space id */ ulint offset);/*!< in: page number */ -/********************************************************************//** -Resets the check_index_page_at_flush field of a page if found in the buffer -pool. */ -UNIV_INTERN -void -buf_reset_check_index_page_at_flush( -/*================================*/ - ulint space, /*!< in: space id */ - ulint offset);/*!< in: page number */ #if defined UNIV_DEBUG_FILE_ACCESSES || defined UNIV_DEBUG /********************************************************************//** Sets file_page_was_freed TRUE if the page is found in the buffer pool. @@ -449,17 +438,6 @@ buf_page_peek_if_too_old( /*=====================*/ const buf_page_t* bpage); /*!< in: block to make younger */ /********************************************************************//** -Returns the current state of is_hashed of a page. FALSE if the page is -not in the pool. NOTE that this operation does not fix the page in the -pool if it is found there. -@return TRUE if page hash index is built in search system */ -UNIV_INTERN -ibool -buf_page_peek_if_search_hashed( -/*===========================*/ - ulint space, /*!< in: space id */ - ulint offset);/*!< in: page number */ -/********************************************************************//** Gets the youngest modification log sequence number for a frame. Returns zero if not file page or no modification occurred yet. @return newest modification to page */ @@ -1296,13 +1274,16 @@ struct buf_block_struct{ /* @} */ /** @name Hash search fields - These 6 fields may only be modified when we have + These 5 fields may only be modified when we have an x-latch on btr_search_latch AND - we are holding an s-latch or x-latch on buf_block_struct::lock or - we know that buf_block_struct::buf_fix_count == 0. An exception to this is when we init or create a page - in the buffer pool in buf0buf.c. */ + in the buffer pool in buf0buf.c. + + Another exception is that assigning block->index = NULL + is allowed whenever holding an x-latch on btr_search_latch. */ /* @{ */ @@ -1311,20 +1292,20 @@ struct buf_block_struct{ pointers in the adaptive hash index pointing to this frame */ #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */ - unsigned is_hashed:1; /*!< TRUE if hash index has - already been built on this - page; note that it does not - guarantee that the index is - complete, though: there may - have been hash collisions, - record deletions, etc. */ unsigned curr_n_fields:10;/*!< prefix length for hash indexing: number of full fields */ unsigned curr_n_bytes:15;/*!< number of bytes in hash indexing */ unsigned curr_left_side:1;/*!< TRUE or FALSE in hash indexing */ - dict_index_t* index; /*!< Index for which the adaptive - hash index has been created. */ + dict_index_t* index; /*!< Index for which the + adaptive hash index has been + created, or NULL if the page + does not exist in the + index. Note that it does not + guarantee that the index is + complete, though: there may + have been hash collisions, + record deletions, etc. */ /* @} */ # ifdef UNIV_SYNC_DEBUG /** @name Debug fields */ |