ian rau / mbed-rto

non blocking queue

Fork of mbed-rtos by mbed official

rtos/MemoryPool.h@6:350b53afb889, 2012-11-23 (annotated)

Committer:
emilmont
Date:
Fri Nov 23 09:57:31 2012 +0000
Revision:
6:350b53afb889
Child:
8:88a1a9c26ae3
Merge RTOS C++ API and RTX under the same library; Update RTX to version 4.60; Add proper Thread destructor;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 6:350b53afb889 1 /* Copyright (c) 2012 mbed.org */
emilmont 6:350b53afb889 2 #ifndef MEMORYPOOL_H
emilmont 6:350b53afb889 3 #define MEMORYPOOL_H
emilmont 6:350b53afb889 4
emilmont 6:350b53afb889 5 #include <stdint.h>
emilmont 6:350b53afb889 6 #include <string.h>
emilmont 6:350b53afb889 7
emilmont 6:350b53afb889 8 #include "cmsis_os.h"
emilmont 6:350b53afb889 9
emilmont 6:350b53afb889 10 namespace rtos {
emilmont 6:350b53afb889 11
emilmont 6:350b53afb889 12 /*! Define and manage fixed-size memory pools of objects of a given type.
emilmont 6:350b53afb889 13 \tparam T data type of a single object (element).
emilmont 6:350b53afb889 14 \tparam queue_sz maximum number of objects (elements) in the memory pool.
emilmont 6:350b53afb889 15 */
emilmont 6:350b53afb889 16 template<typename T, uint32_t pool_sz>
emilmont 6:350b53afb889 17 class MemoryPool {
emilmont 6:350b53afb889 18 public:
emilmont 6:350b53afb889 19 /*! Create and Initialize a memory pool. */
emilmont 6:350b53afb889 20 MemoryPool() {
emilmont 6:350b53afb889 21 #ifdef CMSIS_OS_RTX
emilmont 6:350b53afb889 22 memset(_pool_m, 0, sizeof(_pool_m));
emilmont 6:350b53afb889 23 _pool_def.pool = _pool_m;
emilmont 6:350b53afb889 24
emilmont 6:350b53afb889 25 _pool_def.pool_sz = pool_sz;
emilmont 6:350b53afb889 26 _pool_def.item_sz = sizeof(T);
emilmont 6:350b53afb889 27 #endif
emilmont 6:350b53afb889 28 _pool_id = osPoolCreate(&_pool_def);
emilmont 6:350b53afb889 29 }
emilmont 6:350b53afb889 30
emilmont 6:350b53afb889 31 /*! Allocate a memory block of type T from a memory pool.
emilmont 6:350b53afb889 32 \return address of the allocated memory block or NULL in case of no memory available.
emilmont 6:350b53afb889 33 */
emilmont 6:350b53afb889 34 T* alloc(void) {
emilmont 6:350b53afb889 35 return (T*)osPoolAlloc(_pool_id);
emilmont 6:350b53afb889 36 }
emilmont 6:350b53afb889 37
emilmont 6:350b53afb889 38 /*! Allocate a memory block of type T from a memory pool and set memory block to zero.
emilmont 6:350b53afb889 39 \return address of the allocated memory block or NULL in case of no memory available.
emilmont 6:350b53afb889 40 */
emilmont 6:350b53afb889 41 T* calloc(void) {
emilmont 6:350b53afb889 42 return (T*)osPoolCAlloc(_pool_id);
emilmont 6:350b53afb889 43 }
emilmont 6:350b53afb889 44
emilmont 6:350b53afb889 45 /*! Return an allocated memory block back to a specific memory pool.
emilmont 6:350b53afb889 46 \param address of the allocated memory block that is returned to the memory pool.
emilmont 6:350b53afb889 47 \return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 48 */
emilmont 6:350b53afb889 49 osStatus free(T *block) {
emilmont 6:350b53afb889 50 return osPoolFree(_pool_id, (void*)block);
emilmont 6:350b53afb889 51 }
emilmont 6:350b53afb889 52
emilmont 6:350b53afb889 53 private:
emilmont 6:350b53afb889 54 osPoolId _pool_id;
emilmont 6:350b53afb889 55 osPoolDef_t _pool_def;
emilmont 6:350b53afb889 56 #ifdef CMSIS_OS_RTX
emilmont 6:350b53afb889 57 uint32_t _pool_m[3+((sizeof(T)+3)/4)*(pool_sz)];
emilmont 6:350b53afb889 58 #endif
emilmont 6:350b53afb889 59 };
emilmont 6:350b53afb889 60
emilmont 6:350b53afb889 61 }
emilmont 6:350b53afb889 62 #endif