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110 lines
3.4 KiB
110 lines
3.4 KiB
3 years ago
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/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*=============================================================================
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VideoCore OS Abstraction Layer - memory pool support
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=============================================================================*/
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#ifndef VCOS_MEMPOOL_H
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#define VCOS_MEMPOOL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "interface/vcos/vcos_types.h"
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#include "vcos.h"
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/** \file
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*
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* Memory pools - variable sized allocator.
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*
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* A very basic memory pool API.
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*
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* This interface is deliberately not thread safe - clients should add
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* their own locking, if required.
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*
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*
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* \fixme: Add fixed-size allocator.
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*
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*/
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/** Initialize a memory pool. The control data is taken from the memory
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* supplied itself.
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*
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* Note: the dmalloc pool uses the memory supplied for its control
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* area. This is probably a bit broken, as it stops you creating
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* a pool in some "special" area of memory, while leaving the control
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* information in normal memory.
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*
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* @param pool Pointer to pool object.
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*
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* @param name Name for the pool. Used for diagnostics.
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*
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* @param start Starting address. Must be at least 8byte aligned.
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*
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* @param size Size of pool in bytes.
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*
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* @return VCOS_SUCCESS if pool was created.
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*/
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VCOS_INLINE_DECL
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VCOS_STATUS_T vcos_mempool_create(VCOS_MEMPOOL_T *pool, const char *name, void *start, VCOS_UNSIGNED size);
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/** Allocate some memory from a pool. If no memory is available, it
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* returns NULL.
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*
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* @param pool Pool to allocate from
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* @param len Length of memory to allocate
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*
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*/
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VCOS_INLINE_DECL
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void *vcos_mempool_alloc(VCOS_MEMPOOL_T *pool, VCOS_UNSIGNED len);
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/** Free some memory back to a pool.
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*
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* @param pool Pool to return to
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* @param mem Memory to return
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*/
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VCOS_INLINE_DECL
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void vcos_mempool_free(VCOS_MEMPOOL_T *pool, void *mem);
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/** Deinitialize a memory pool.
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*
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* @param pool Pool to return to
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*/
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VCOS_INLINE_DECL
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void vcos_mempool_delete(VCOS_MEMPOOL_T *pool);
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#ifdef __cplusplus
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}
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#endif
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#endif
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