96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/*
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* Copyright (c) 1997-2012, 2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief Memory Pools
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*/
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#ifndef _MEMORY_POOL_H
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#define _MEMORY_POOL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Memory Pools
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* @defgroup microkernel_memorypool Microkernel Memory Pools
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* @ingroup microkernel_services
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* @{
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*/
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/**
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* @brief Return memory pool block
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*
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* This routine returns a block to the memory pool it was allocated from.
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*
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* @param b Pointer to block descriptor.
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*
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* @return N/A
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*/
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extern void task_mem_pool_free(struct k_block *b);
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/**
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* @brief Defragment memory pool
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*
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* This routine concatenates unused blocks that can be merged in memory pool
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* @a p.
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*
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* Doing a complete defragmentation of a memory pool before allocating a set
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* of blocks may be more efficient than having the pool do an implicit
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* partial defragmentation each time a block is allocated.
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*
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* @param p Memory pool name.
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*
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* @return N/A
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*/
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extern void task_mem_pool_defragment(kmemory_pool_t p);
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/**
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* @brief Allocate memory pool block
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*
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* This routine allocates a block of at least @a reqsize bytes from memory pool
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* @a pool_id, and saves its information in block descriptor @a blockptr. If no
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* such block is available the routine either waits until one can be allocated,
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* or until the specified time limit is reached.
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*
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* @param blockptr Pointer to block descriptor.
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* @param pool_id Memory pool name.
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* @param reqsize Requested block size, in bytes.
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* @param timeout Affects the action taken should the memory pool be exhausted.
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* If TICKS_NONE, then return immediately. If TICKS_UNLIMITED, then wait as
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* long as necessary. Otherwise wait up to the specified number of ticks before
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* timing out.
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*
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* @retval RC_OK Successfully allocated memory block
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* @retval RC_TIME Timed out while waiting for memory block
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* @retval RC_FAIL Failed to immediately allocate memory block when
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* @a timeout = TICKS_NONE
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*/
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extern int task_mem_pool_alloc(struct k_block *blockptr, kmemory_pool_t pool_id,
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int reqsize, int32_t timeout);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _MEMORY_POOL_H */
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