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641.2.2
by Monty Taylor
InnoDB Plugin 1.0.3 |
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/*****************************************************************************
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Copyright (c) 2006, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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/******************************************************
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Binary buddy allocator for compressed pages
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Created December 2006 by Marko Makela
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*******************************************************/
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#ifndef buf0buddy_h
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#define buf0buddy_h
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#ifdef UNIV_MATERIALIZE
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# undef UNIV_INLINE
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# define UNIV_INLINE
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#endif
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#include "univ.i" |
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#include "buf0types.h" |
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/**************************************************************************
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Allocate a block. The thread calling this function must hold
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buf_pool_mutex and must not hold buf_pool_zip_mutex or any
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block->mutex. The buf_pool_mutex may only be released and reacquired
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if lru != NULL. This function should only be used for allocating
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compressed page frames or control blocks (buf_page_t). Allocated
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control blocks must be properly initialized immediately after
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buf_buddy_alloc() has returned the memory, before releasing
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buf_pool_mutex. */
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UNIV_INLINE
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void* |
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buf_buddy_alloc( |
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/*============*/
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/* out: allocated block,
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possibly NULL if lru == NULL */
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ulint size, /* in: block size, up to UNIV_PAGE_SIZE */ |
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ibool* lru) /* in: pointer to a variable that will be assigned |
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TRUE if storage was allocated from the LRU list
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and buf_pool_mutex was temporarily released,
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or NULL if the LRU list should not be used */
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__attribute__((malloc)); |
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/**************************************************************************
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Release a block. */
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UNIV_INLINE
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void
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buf_buddy_free( |
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/*===========*/
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void* buf, /* in: block to be freed, must not be |
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pointed to by the buffer pool */
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ulint size) /* in: block size, up to UNIV_PAGE_SIZE */ |
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__attribute__((nonnull)); |
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/** Statistics of buddy blocks of a given size. */
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struct buf_buddy_stat_struct { |
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/** Number of blocks allocated from the buddy system. */
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ulint used; |
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/** Number of blocks relocated by the buddy system. */
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ib_uint64_t relocated; |
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/** Total duration of block relocations, in microseconds. */
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ib_uint64_t relocated_usec; |
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};
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typedef struct buf_buddy_stat_struct buf_buddy_stat_t; |
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/** Statistics of the buddy system, indexed by block size.
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Protected by buf_pool_mutex. */
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extern buf_buddy_stat_t buf_buddy_stat[BUF_BUDDY_SIZES + 1]; |
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#ifndef UNIV_NONINL
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# include "buf0buddy.ic"
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#endif
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#endif /* buf0buddy_h */ |