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386 lines
14 KiB
C
386 lines
14 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio.
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This file is part of ChibiOS.
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ChibiOS 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 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 oslib/include/chmempools.h
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* @brief Memory Pools macros and structures.
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*
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* @addtogroup oslib_mempools
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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_CFG_USE_MEMPOOLS == TRUE) || 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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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if CH_CFG_USE_MEMCORE == FALSE
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#error "CH_CFG_USE_MEMPOOLS requires CH_CFG_USE_MEMCORE"
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#endif
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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 *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 *next; /**< @brief Pointer to the header. */
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size_t object_size; /**< @brief Memory pool objects
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size. */
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unsigned align; /**< @brief Required alignment. */
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memgetfunc_t provider; /**< @brief Memory blocks provider
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for this pool. */
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} memory_pool_t;
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#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Guarded memory pool descriptor.
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*/
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typedef struct {
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semaphore_t sem; /**< @brief Counter semaphore guarding
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the memory pool. */
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memory_pool_t pool; /**< @brief The memory pool itself. */
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} guarded_memory_pool_t;
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#endif /* CH_CFG_USE_SEMAPHORES == TRUE */
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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] align required memory alignment
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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, align, provider) \
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{NULL, size, align, provider}
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/**
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* @brief Static memory pool initializer.
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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] align required memory alignment
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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, align, provider) \
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memory_pool_t name = _MEMORYPOOL_DATA(name, size, align, provider)
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#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Data part of a static guarded 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] align required memory alignment
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*/
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#define _GUARDEDMEMORYPOOL_DATA(name, size, align) { \
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_SEMAPHORE_DATA(name.sem, (cnt_t)0), \
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_MEMORYPOOL_DATA(NULL, size, align, NULL) \
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}
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/**
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* @brief Static guarded memory pool initializer.
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* @details Statically initialized guarded memory pools require no explicit
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* initialization using @p chGuardedPoolInit().
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*
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* @param[in] name the name of the guarded memory pool variable
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* @param[in] size size of the memory pool contained objects
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* @param[in] align required memory alignment
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*/
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#define GUARDEDMEMORYPOOL_DECL(name, size, align) \
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guarded_memory_pool_t name = _GUARDEDMEMORYPOOL_DATA(name, size, align)
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#endif /* CH_CFG_USE_SEMAPHORES == TRUE */
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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 chPoolObjectInitAligned(memory_pool_t *mp, size_t size,
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unsigned align, 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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#if CH_CFG_USE_SEMAPHORES == TRUE
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void chGuardedPoolObjectInitAligned(guarded_memory_pool_t *gmp,
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size_t size,
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unsigned align);
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void chGuardedPoolLoadArray(guarded_memory_pool_t *gmp, void *p, size_t n);
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void *chGuardedPoolAllocTimeoutS(guarded_memory_pool_t *gmp,
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sysinterval_t timeout);
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void *chGuardedPoolAllocTimeout(guarded_memory_pool_t *gmp,
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sysinterval_t timeout);
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void chGuardedPoolFree(guarded_memory_pool_t *gmp, void *objp);
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#endif
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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 Initializes an empty memory pool.
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*
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* @param[out] mp pointer to a @p memory_pool_t structure
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* @param[in] size the size of the objects contained in this memory pool,
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* the minimum accepted size is the size of a pointer to
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* void.
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* @param[in] provider memory provider function for the memory pool or
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* @p NULL if the pool is not allowed to grow
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* automatically
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*
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* @init
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*/
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static inline void chPoolObjectInit(memory_pool_t *mp,
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size_t size,
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memgetfunc_t provider) {
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chPoolObjectInitAligned(mp, size, PORT_NATURAL_ALIGN, provider);
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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 properly aligned.
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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 properly aligned.
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* @note This function is just an alias for @p chPoolFreeI() 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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chPoolFreeI(mp, objp);
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}
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#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Initializes an empty guarded memory pool.
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*
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* @param[out] gmp pointer to a @p guarded_memory_pool_t structure
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* @param[in] size the size of the objects contained in this guarded
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* memory pool, the minimum accepted size is the size
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* of a pointer to void.
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*
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* @init
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*/
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static inline void chGuardedPoolObjectInit(guarded_memory_pool_t *gmp,
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size_t size) {
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chGuardedPoolObjectInitAligned(gmp, size, PORT_NATURAL_ALIGN);
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}
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/**
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* @brief Gets the count of objects in a guarded memory pool.
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* @pre The guarded memory pool must be already been initialized.
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*
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* @param[in] gmp pointer to a @p guarded_memory_pool_t structure
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* @return The counter of the guard semaphore.
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*
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* @iclass
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*/
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static inline cnt_t chGuardedPoolGetCounterI(guarded_memory_pool_t *gmp) {
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return chSemGetCounterI(&gmp->sem);
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}
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/**
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* @brief Allocates an object from a guarded memory pool.
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* @pre The guarded memory pool must be already been initialized.
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*
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* @param[in] gmp pointer to a @p guarded_memory_pool_t structure
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* @return The pointer to the allocated object.
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* @retval NULL if the pool is empty.
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*
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* @iclass
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*/
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static inline void *chGuardedPoolAllocI(guarded_memory_pool_t *gmp) {
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void *p;
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p = chPoolAllocI(&gmp->pool);
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if (p != NULL) {
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chSemFastWaitI(&gmp->sem);
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chDbgAssert(chSemGetCounterI(&gmp->sem) >= (cnt_t)0,
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"semaphore out of sync");
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}
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return p;
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}
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/**
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* @brief Releases an object into a guarded memory pool.
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* @pre The guarded memory pool must already be initialized.
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* @pre The freed object must be of the right size for the specified
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* guarded memory pool.
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* @pre The added object must be properly aligned.
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*
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* @param[in] gmp pointer to a @p guarded_memory_pool_t structure
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* @param[in] objp the pointer to the object to be released
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*
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* @iclass
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*/
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static inline void chGuardedPoolFreeI(guarded_memory_pool_t *gmp, void *objp) {
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chPoolFreeI(&gmp->pool, objp);
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chSemSignalI(&gmp->sem);
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}
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/**
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* @brief Releases an object into a guarded memory pool.
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* @pre The guarded memory pool must already be initialized.
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* @pre The freed object must be of the right size for the specified
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* guarded memory pool.
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* @pre The added object must be properly aligned.
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*
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* @param[in] gmp pointer to a @p guarded_memory_pool_t structure
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* @param[in] objp the pointer to the object to be released
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*
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* @sclass
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*/
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static inline void chGuardedPoolFreeS(guarded_memory_pool_t *gmp, void *objp) {
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chGuardedPoolFreeI(gmp, objp);
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chSchRescheduleS();
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}
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/**
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* @brief Adds an object to a guarded memory pool.
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* @pre The guarded 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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* guarded memory pool.
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* @pre The added object must be properly aligned.
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* @note This function is just an alias for @p chGuardedPoolFree() and
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* has been added for clarity.
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*
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* @param[in] gmp pointer to a @p guarded_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 chGuardedPoolAdd(guarded_memory_pool_t *gmp, void *objp) {
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chGuardedPoolFree(gmp, objp);
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}
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/**
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* @brief Adds an object to a guarded memory pool.
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* @pre The guarded 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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* guarded memory pool.
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* @pre The added object must be properly aligned.
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* @note This function is just an alias for @p chGuardedPoolFreeI() and
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* has been added for clarity.
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*
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* @param[in] gmp pointer to a @p guarded_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 chGuardedPoolAddI(guarded_memory_pool_t *gmp, void *objp) {
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chGuardedPoolFreeI(gmp, objp);
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}
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/**
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* @brief Adds an object to a guarded memory pool.
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* @pre The guarded 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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* guarded memory pool.
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* @pre The added object must be properly aligned.
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* @note This function is just an alias for @p chGuardedPoolFreeI() and
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* has been added for clarity.
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*
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* @param[in] gmp pointer to a @p guarded_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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* @sclass
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*/
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static inline void chGuardedPoolAddS(guarded_memory_pool_t *gmp, void *objp) {
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chGuardedPoolFreeS(gmp, objp);
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}
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#endif /* CH_CFG_USE_SEMAPHORES == TRUE */
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#endif /* CH_CFG_USE_MEMPOOLS == TRUE */
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#endif /* CHMEMPOOLS_H */
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/** @} */
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