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77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/*****************************************************************************
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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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/**************************************************//**
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@file include/buf0buddy.h
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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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@return allocated block, possibly NULL if lru == NULL */
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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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buf_pool_t* buf_pool,
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/*!< buffer pool in which the block resides */
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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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buf_pool_t* buf_pool,
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/*!< buffer pool in which the block resides */
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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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#ifndef UNIV_NONINL
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# include "buf0buddy.ic"
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#endif
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#endif /* buf0buddy_h */
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