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/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file mempools.h
* @brief Memory Pools macros and structures.
* @addtogroup pools
* @{
*/
#ifndef _MEMPOOLS_H_
#define _MEMPOOLS_H_
#if CH_USE_MEMPOOLS
/**
* @brief Memory pool free object header.
*/
struct pool_header {
struct pool_header *ph_next;
};
/**
* @brief Memory pool descriptor.
*/
typedef struct {
struct pool_header *mp_next; /**< Pointer to the header. */
size_t mp_object_size; /**< Memory pool objects size. */
#if CH_USE_MEMCORE
bool_t mp_usecore; /**< Feed from the memory code
allocator if empty. */
#endif
} MemoryPool;
/**
* @brief Data part of a static memory pool initializer.
* @details This macro should be used when statically initializing a
* memory pool that is part of a bigger structure.
*
* @param name the name of the memory pool variable
* @param size size of the memory pool contained objects
*/
#define _MEMORYPOOL_DATA(name, size) {NULL, size}
/**
* @brief Static memory pool initializer.
* @details Statically initialized memory pools require no explicit
* initialization using @p chPoolInit().
*
* @param name the name of the memory pool variable
* @param size size of the memory pool contained objects
*/
#define MEMORYPOOL_DECL(name, size) \
MemoryPool name = _MEMORYPOOL_DATA(name, size)
#if CH_USE_MEMCORE || defined(__DOXYGEN__)
/**
* @brief Enables or disables the hungry mode.
* @details If enabled, the hungry mode, makes an empty memory pool feed
* new objects from the core memory manager.
*
* @param[in] mp pointer to a @p MemoryPool structure
* @param[in] mode hungry mode flag
*/
#define chPoolSetHungryMode(mp, mode) ((mp)->mp_usecore = (mode))
#endif
#ifdef __cplusplus
extern "C" {
#endif
void chPoolInit(MemoryPool *mp, size_t size);
void *chPoolAllocI(MemoryPool *mp);
void *chPoolAlloc(MemoryPool *mp);
void chPoolFreeI(MemoryPool *mp, void *objp);
void chPoolFree(MemoryPool *mp, void *objp);
#ifdef __cplusplus
}
#endif
#endif /* CH_USE_MEMPOOLS */
#endif /* _MEMPOOLS_H_ */
/** @} */
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