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| author | Giovanni Di Sirio <gdisirio@gmail.com> | 2018-03-13 09:47:32 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <gdisirio@gmail.com> | 2018-03-13 09:47:32 +0000 |
| commit | 4492ac9c2d105d06d4e7ecfb3a63f313d55963a4 (patch) | |
| tree | 3a688e592406ff05306baf697c6231eaac6234c2 /os/lib/include/chmempools.h | |
| parent | 08ad71bfe3fbffffd90fae7555282cab73ba7c4b (diff) | |
| download | ChibiOS-4492ac9c2d105d06d4e7ecfb3a63f313d55963a4.tar.gz ChibiOS-4492ac9c2d105d06d4e7ecfb3a63f313d55963a4.tar.bz2 ChibiOS-4492ac9c2d105d06d4e7ecfb3a63f313d55963a4.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11721 110e8d01-0319-4d1e-a829-52ad28d1bb01
Diffstat (limited to 'os/lib/include/chmempools.h')
| -rw-r--r-- | os/lib/include/chmempools.h | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/os/lib/include/chmempools.h b/os/lib/include/chmempools.h new file mode 100644 index 000000000..59eedc588 --- /dev/null +++ b/os/lib/include/chmempools.h @@ -0,0 +1,323 @@ +/*
+ ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio.
+
+ This file is part of ChibiOS.
+
+ ChibiOS 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 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 chmempools.h
+ * @brief Memory Pools macros and structures.
+ *
+ * @addtogroup pools
+ * @{
+ */
+
+#ifndef CHMEMPOOLS_H
+#define CHMEMPOOLS_H
+
+#if !defined(CH_CFG_USE_MEMPOOLS)
+#define CH_CFG_USE_MEMPOOLS FALSE
+#endif
+
+#if (CH_CFG_USE_MEMPOOLS == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Module constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module pre-compile time settings. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if CH_CFG_USE_MEMCORE == FALSE
+#error "CH_CFG_USE_MEMPOOLS requires CH_CFG_USE_MEMCORE"
+#endif
+
+/*===========================================================================*/
+/* Module data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Memory pool free object header.
+ */
+struct pool_header {
+ struct pool_header *next; /**< @brief Pointer to the next pool
+ header in the list. */
+};
+
+/**
+ * @brief Memory pool descriptor.
+ */
+typedef struct {
+ struct pool_header *next; /**< @brief Pointer to the header. */
+ size_t object_size; /**< @brief Memory pool objects
+ size. */
+ unsigned align; /**< @brief Required alignment. */
+ memgetfunc_t provider; /**< @brief Memory blocks provider
+ for this pool. */
+} memory_pool_t;
+
+#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief Guarded memory pool descriptor.
+ */
+typedef struct {
+ semaphore_t sem; /**< @brief Counter semaphore guarding
+ the memory pool. */
+ memory_pool_t pool; /**< @brief The memory pool itself. */
+} guarded_memory_pool_t;
+#endif /* CH_CFG_USE_SEMAPHORES == TRUE */
+
+/*===========================================================================*/
+/* Module macros. */
+/*===========================================================================*/
+
+/**
+ * @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[in] name the name of the memory pool variable
+ * @param[in] size size of the memory pool contained objects
+ * @param[in] align required memory alignment
+ * @param[in] provider memory provider function for the memory pool
+ */
+#define _MEMORYPOOL_DATA(name, size, align, provider) \
+ {NULL, size, align, provider}
+
+/**
+ * @brief Static memory pool initializer.
+ * @details Statically initialized memory pools require no explicit
+ * initialization using @p chPoolInit().
+ *
+ * @param[in] name the name of the memory pool variable
+ * @param[in] size size of the memory pool contained objects
+ * @param[in] align required memory alignment
+ * @param[in] provider memory provider function for the memory pool or @p NULL
+ * if the pool is not allowed to grow automatically
+ */
+#define MEMORYPOOL_DECL(name, size, align, provider) \
+ memory_pool_t name = _MEMORYPOOL_DATA(name, size, align, provider)
+
+#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief Data part of a static guarded memory pool initializer.
+ * @details This macro should be used when statically initializing a
+ * memory pool that is part of a bigger structure.
+ *
+ * @param[in] name the name of the memory pool variable
+ * @param[in] size size of the memory pool contained objects
+ * @param[in] align required memory alignment
+ */
+#define _GUARDEDMEMORYPOOL_DATA(name, size, align) { \
+ _SEMAPHORE_DATA(name.sem, (cnt_t)0), \
+ _MEMORYPOOL_DATA(NULL, size, align, NULL) \
+}
+
+/**
+ * @brief Static guarded memory pool initializer.
+ * @details Statically initialized guarded memory pools require no explicit
+ * initialization using @p chGuardedPoolInit().
+ *
+ * @param[in] name the name of the guarded memory pool variable
+ * @param[in] size size of the memory pool contained objects
+ * @param[in] align required memory alignment
+ */
+#define GUARDEDMEMORYPOOL_DECL(name, size, align) \
+ guarded_memory_pool_t name = _GUARDEDMEMORYPOOL_DATA(name, size, align)
+#endif /* CH_CFG_USE_SEMAPHORES == TRUE */
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void chPoolObjectInitAligned(memory_pool_t *mp, size_t size,
+ unsigned align, memgetfunc_t provider);
+ void chPoolLoadArray(memory_pool_t *mp, void *p, size_t n);
+ void *chPoolAllocI(memory_pool_t *mp);
+ void *chPoolAlloc(memory_pool_t *mp);
+ void chPoolFreeI(memory_pool_t *mp, void *objp);
+ void chPoolFree(memory_pool_t *mp, void *objp);
+#if CH_CFG_USE_SEMAPHORES == TRUE
+ void chGuardedPoolObjectInitAligned(guarded_memory_pool_t *gmp,
+ size_t size,
+ unsigned align);
+ void chGuardedPoolLoadArray(guarded_memory_pool_t *gmp, void *p, size_t n);
+ void *chGuardedPoolAllocTimeoutS(guarded_memory_pool_t *gmp,
+ sysinterval_t timeout);
+ void *chGuardedPoolAllocTimeout(guarded_memory_pool_t *gmp,
+ sysinterval_t timeout);
+ void chGuardedPoolFreeI(guarded_memory_pool_t *gmp, void *objp);
+ void chGuardedPoolFree(guarded_memory_pool_t *gmp, void *objp);
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/*===========================================================================*/
+/* Module inline functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Initializes an empty memory pool.
+ *
+ * @param[out] mp pointer to a @p memory_pool_t structure
+ * @param[in] size the size of the objects contained in this memory pool,
+ * the minimum accepted size is the size of a pointer to
+ * void.
+ * @param[in] provider memory provider function for the memory pool or
+ * @p NULL if the pool is not allowed to grow
+ * automatically
+ *
+ * @init
+ */
+static inline void chPoolObjectInit(memory_pool_t *mp,
+ size_t size,
+ memgetfunc_t provider) {
+
+ chPoolObjectInitAligned(mp, size, PORT_NATURAL_ALIGN, provider);
+}
+
+/**
+ * @brief Adds an object to a memory pool.
+ * @pre The memory pool must be already been initialized.
+ * @pre The added object must be of the right size for the specified
+ * memory pool.
+ * @pre The added object must be memory aligned to the size of
+ * @p stkalign_t type.
+ * @note This function is just an alias for @p chPoolFree() and has been
+ * added for clarity.
+ *
+ * @param[in] mp pointer to a @p memory_pool_t structure
+ * @param[in] objp the pointer to the object to be added
+ *
+ * @api
+ */
+static inline void chPoolAdd(memory_pool_t *mp, void *objp) {
+
+ chPoolFree(mp, objp);
+}
+
+/**
+ * @brief Adds an object to a memory pool.
+ * @pre The memory pool must be already been initialized.
+ * @pre The added object must be of the right size for the specified
+ * memory pool.
+ * @pre The added object must be memory aligned to the size of
+ * @p stkalign_t type.
+ * @note This function is just an alias for @p chPoolFreeI() and has been
+ * added for clarity.
+ *
+ * @param[in] mp pointer to a @p memory_pool_t structure
+ * @param[in] objp the pointer to the object to be added
+ *
+ * @iclass
+ */
+static inline void chPoolAddI(memory_pool_t *mp, void *objp) {
+
+ chPoolFreeI(mp, objp);
+}
+
+#if (CH_CFG_USE_SEMAPHORES == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief Initializes an empty guarded memory pool.
+ *
+ * @param[out] gmp pointer to a @p guarded_memory_pool_t structure
+ * @param[in] size the size of the objects contained in this guarded
+ * memory pool, the minimum accepted size is the size
+ * of a pointer to void.
+ *
+ * @init
+ */
+static inline void chGuardedPoolObjectInit(guarded_memory_pool_t *gmp,
+ size_t size) {
+
+ chGuardedPoolObjectInitAligned(gmp, size, PORT_NATURAL_ALIGN);
+}
+
+/**
+ * @brief Adds an object to a guarded memory pool.
+ * @pre The guarded memory pool must be already been initialized.
+ * @pre The added object must be of the right size for the specified
+ * guarded memory pool.
+ * @pre The added object must be properly aligned.
+ * @note This function is just an alias for @p chGuardedPoolFree() and
+ * has been added for clarity.
+ *
+ * @param[in] gmp pointer to a @p guarded_memory_pool_t structure
+ * @param[in] objp the pointer to the object to be added
+ *
+ * @api
+ */
+static inline void chGuardedPoolAdd(guarded_memory_pool_t *gmp, void *objp) {
+
+ chGuardedPoolFree(gmp, objp);
+}
+
+/**
+ * @brief Adds an object to a guarded memory pool.
+ * @pre The guarded memory pool must be already been initialized.
+ * @pre The added object must be of the right size for the specified
+ * guarded memory pool.
+ * @pre The added object must be properly aligned.
+ * @note This function is just an alias for @p chGuardedPoolFreeI() and
+ * has been added for clarity.
+ *
+ * @param[in] gmp pointer to a @p guarded_memory_pool_t structure
+ * @param[in] objp the pointer to the object to be added
+ *
+ * @iclass
+ */
+static inline void chGuardedPoolAddI(guarded_memory_pool_t *gmp, void *objp) {
+
+ chGuardedPoolFreeI(gmp, objp);
+}
+
+/**
+ * @brief Allocates an object from a guarded memory pool.
+ * @pre The guarded memory pool must be already been initialized.
+ *
+ * @param[in] gmp pointer to a @p guarded_memory_pool_t structure
+ * @return The pointer to the allocated object.
+ * @retval NULL if the pool is empty.
+ *
+ * @iclass
+ */
+static inline void *chGuardedPoolAllocI(guarded_memory_pool_t *gmp) {
+ void *p;
+
+ p = chPoolAllocI(&gmp->pool);
+ if (p != NULL) {
+ chSemFastWaitI(&gmp->sem);
+ chDbgAssert(chSemGetCounterI(&gmp->sem) >= (cnt_t)0,
+ "semaphore out of sync");
+ }
+ return p;
+}
+#endif /* CH_CFG_USE_SEMAPHORES == TRUE */
+
+#endif /* CH_CFG_USE_MEMPOOLS == TRUE */
+
+#endif /* CHMEMPOOLS_H */
+
+/** @} */
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