diff options
Diffstat (limited to 'storage/xtradb/include/buf0buddy.ic')
| -rw-r--r-- | storage/xtradb/include/buf0buddy.ic | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/storage/xtradb/include/buf0buddy.ic b/storage/xtradb/include/buf0buddy.ic index 69659fb69d6..63241311e1f 100644 --- a/storage/xtradb/include/buf0buddy.ic +++ b/storage/xtradb/include/buf0buddy.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved. +Copyright (c) 2006, 2011, 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 @@ -36,8 +36,8 @@ Created December 2006 by Marko Makela /**********************************************************************//** Allocate a block. The thread calling this function must hold buf_pool_mutex and must not hold buf_pool_zip_mutex or any block->mutex. -The buf_pool_mutex may only be released and reacquired if lru != NULL. -@return allocated block, possibly NULL if lru==NULL */ +The buf_pool_mutex may be released and reacquired. +@return allocated block, never NULL */ UNIV_INTERN void* buf_buddy_alloc_low( @@ -46,10 +46,9 @@ buf_buddy_alloc_low( or BUF_BUDDY_SIZES */ ibool* lru, /*!< in: pointer to a variable that will be assigned TRUE if storage was allocated from the LRU list - and buf_pool_mutex was temporarily released, - or NULL if the LRU list should not be used */ + and buf_pool_mutex was temporarily released */ ibool have_page_hash_mutex) - __attribute__((malloc)); + __attribute__((malloc, nonnull)); /**********************************************************************//** Deallocate a block. */ @@ -76,6 +75,8 @@ buf_buddy_get_slot( ulint i; ulint s; + ut_ad(size >= PAGE_ZIP_MIN_SIZE); + for (i = 0, s = BUF_BUDDY_LOW; s < size; i++, s <<= 1) { } @@ -86,27 +87,26 @@ buf_buddy_get_slot( /**********************************************************************//** Allocate a block. The thread calling this function must hold buf_pool_mutex and must not hold buf_pool_zip_mutex or any -block->mutex. The buf_pool_mutex may only be released and reacquired -if lru != NULL. This function should only be used for allocating -compressed page frames or control blocks (buf_page_t). Allocated -control blocks must be properly initialized immediately after -buf_buddy_alloc() has returned the memory, before releasing -buf_pool_mutex. -@return allocated block, possibly NULL if lru == NULL */ +block->mutex. The buf_pool_mutex may be released and reacquired. +This function should only be used for allocating compressed page frames. +@return allocated block, never NULL */ UNIV_INLINE void* buf_buddy_alloc( /*============*/ - ulint size, /*!< in: block size, up to UNIV_PAGE_SIZE */ + ulint size, /*!< in: compressed page size + (between PAGE_ZIP_MIN_SIZE and UNIV_PAGE_SIZE) */ ibool* lru, /*!< in: pointer to a variable that will be assigned TRUE if storage was allocated from the LRU list - and buf_pool_mutex was temporarily released, - or NULL if the LRU list should not be used */ + and buf_pool_mutex was temporarily released */ ibool have_page_hash_mutex) { //ut_ad(buf_pool_mutex_own()); + ut_ad(ut_is_2pow(size)); + ut_ad(size >= PAGE_ZIP_MIN_SIZE); + ut_ad(size <= UNIV_PAGE_SIZE); - return(buf_buddy_alloc_low(buf_buddy_get_slot(size), lru, have_page_hash_mutex)); + return((byte*) buf_buddy_alloc_low(buf_buddy_get_slot(size), lru, have_page_hash_mutex)); } /**********************************************************************//** @@ -121,6 +121,9 @@ buf_buddy_free( ibool have_page_hash_mutex) { //ut_ad(buf_pool_mutex_own()); + ut_ad(ut_is_2pow(size)); + ut_ad(size >= PAGE_ZIP_MIN_SIZE); + ut_ad(size <= UNIV_PAGE_SIZE); if (!have_page_hash_mutex) { mutex_enter(&LRU_list_mutex); |