170 lines
6.4 KiB
C
170 lines
6.4 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file chmempools.h
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* @brief Memory Pools macros and structures.
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*
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* @addtogroup pools
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* @{
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*/
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#ifndef _CHMEMPOOLS_H_
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#define _CHMEMPOOLS_H_
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#if CH_USE_MEMPOOLS || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Module constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module pre-compile time settings. */
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/*===========================================================================*/
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#if !CH_USE_MEMCORE
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#error "CH_USE_MEMPOOLS requires CH_USE_MEMCORE"
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#endif
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Memory pool free object header.
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*/
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struct pool_header {
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struct pool_header *ph_next; /**< @brief Pointer to the next pool
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header in the list. */
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};
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/**
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* @brief Memory pool descriptor.
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*/
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typedef struct {
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struct pool_header *mp_next; /**< @brief Pointer to the header. */
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size_t mp_object_size; /**< @brief Memory pool objects
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size. */
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memgetfunc_t mp_provider; /**< @brief Memory blocks provider
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for this pool. */
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} memory_pool_t;
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/*===========================================================================*/
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/* Module macros. */
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/*===========================================================================*/
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/**
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* @brief Data part of a static memory pool initializer.
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* @details This macro should be used when statically initializing a
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* memory pool that is part of a bigger structure.
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*
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* @param[in] name the name of the memory pool variable
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* @param[in] size size of the memory pool contained objects
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* @param[in] provider memory provider function for the memory pool
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*/
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#define _MEMORYPOOL_DATA(name, size, provider) \
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{NULL, size, provider}
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/**
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* @brief Static memory pool initializer in hungry mode.
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* @details Statically initialized memory pools require no explicit
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* initialization using @p chPoolInit().
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*
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* @param[in] name the name of the memory pool variable
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* @param[in] size size of the memory pool contained objects
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* @param[in] provider memory provider function for the memory pool or @p NULL
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* if the pool is not allowed to grow automatically
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*/
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#define MEMORYPOOL_DECL(name, size, provider) \
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memory_pool_t name = _MEMORYPOOL_DATA(name, size, provider)
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void chPoolInit(memory_pool_t *mp, size_t size, memgetfunc_t provider);
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void chPoolLoadArray(memory_pool_t *mp, void *p, size_t n);
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void *chPoolAllocI(memory_pool_t *mp);
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void *chPoolAlloc(memory_pool_t *mp);
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void chPoolFreeI(memory_pool_t *mp, void *objp);
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void chPoolFree(memory_pool_t *mp, void *objp);
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#ifdef __cplusplus
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}
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#endif
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/*===========================================================================*/
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/* Module inline functions. */
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/*===========================================================================*/
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/**
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* @brief Adds an object to a memory pool.
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* @pre The memory pool must be already been initialized.
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* @pre The added object must be of the right size for the specified
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* memory pool.
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* @pre The added object must be memory aligned to the size of
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* @p stkalign_t type.
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* @note This function is just an alias for @p chPoolFree() and has been
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* added for clarity.
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*
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* @param[in] mp pointer to a @p memory_pool_t structure
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* @param[in] objp the pointer to the object to be added
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*
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* @api
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*/
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static inline void chPoolAdd(memory_pool_t *mp, void *objp) {
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chPoolFree(mp, objp);
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}
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/**
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* @brief Adds an object to a memory pool.
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* @pre The memory pool must be already been initialized.
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* @pre The added object must be of the right size for the specified
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* memory pool.
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* @pre The added object must be memory aligned to the size of
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* @p stkalign_t type.
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* @note This function is just an alias for @p chPoolFree() and has been
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* added for clarity.
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*
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* @param[in] mp pointer to a @p memory_pool_t structure
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* @param[in] objp the pointer to the object to be added
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*
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* @iclass
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*/
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static inline void chPoolAddI(memory_pool_t *mp, void *objp) {
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chDbgCheckClassI();
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chPoolFreeI(mp, objp);
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}
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#endif /* CH_USE_MEMPOOLS */
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#endif /* _CHMEMPOOLS_H_ */
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/** @} */
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