Weiyu Liu / mbed-rtos

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rtos/MemoryPool.h@105:94371fac911d, 2016-04-29 (annotated)

Committer:
wliu88
Date:
Fri Apr 29 02:03:17 2016 +0000
Revision:
105:94371fac911d
Parent:
31:015df9e602b6 
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emilmont 8:88a1a9c26ae3 1 /* mbed Microcontroller Library
emilmont 8:88a1a9c26ae3 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 8:88a1a9c26ae3 3 *
emilmont 8:88a1a9c26ae3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 8:88a1a9c26ae3 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 8:88a1a9c26ae3 6 * in the Software without restriction, including without limitation the rights
emilmont 8:88a1a9c26ae3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 8:88a1a9c26ae3 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 8:88a1a9c26ae3 9 * furnished to do so, subject to the following conditions:
emilmont 8:88a1a9c26ae3 10 *
emilmont 8:88a1a9c26ae3 11 * The above copyright notice and this permission notice shall be included in
emilmont 8:88a1a9c26ae3 12 * all copies or substantial portions of the Software.
emilmont 8:88a1a9c26ae3 13 *
emilmont 8:88a1a9c26ae3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 8:88a1a9c26ae3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 8:88a1a9c26ae3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 8:88a1a9c26ae3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 8:88a1a9c26ae3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 8:88a1a9c26ae3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 8:88a1a9c26ae3 20 * SOFTWARE.
emilmont 8:88a1a9c26ae3 21 */
emilmont 8:88a1a9c26ae3 22 #ifndef MEMORYPOOL_H
emilmont 8:88a1a9c26ae3 23 #define MEMORYPOOL_H
emilmont 8:88a1a9c26ae3 24
emilmont 8:88a1a9c26ae3 25 #include <stdint.h>
emilmont 8:88a1a9c26ae3 26 #include <string.h>
emilmont 8:88a1a9c26ae3 27
emilmont 8:88a1a9c26ae3 28 #include "cmsis_os.h"
emilmont 8:88a1a9c26ae3 29
emilmont 8:88a1a9c26ae3 30 namespace rtos {
emilmont 8:88a1a9c26ae3 31
emilmont 8:88a1a9c26ae3 32 /** Define and manage fixed-size memory pools of objects of a given type.
emilmont 8:88a1a9c26ae3 33 @tparam T data type of a single object (element).
emilmont 8:88a1a9c26ae3 34 @tparam queue_sz maximum number of objects (elements) in the memory pool.
emilmont 8:88a1a9c26ae3 35 */
emilmont 8:88a1a9c26ae3 36 template<typename T, uint32_t pool_sz>
emilmont 8:88a1a9c26ae3 37 class MemoryPool {
emilmont 8:88a1a9c26ae3 38 public:
emilmont 8:88a1a9c26ae3 39 /** Create and Initialize a memory pool. */
emilmont 8:88a1a9c26ae3 40 MemoryPool() {
emilmont 8:88a1a9c26ae3 41 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 42 memset(_pool_m, 0, sizeof(_pool_m));
emilmont 8:88a1a9c26ae3 43 _pool_def.pool = _pool_m;
mbed_official 31:015df9e602b6 44
emilmont 8:88a1a9c26ae3 45 _pool_def.pool_sz = pool_sz;
emilmont 8:88a1a9c26ae3 46 _pool_def.item_sz = sizeof(T);
emilmont 8:88a1a9c26ae3 47 #endif
emilmont 8:88a1a9c26ae3 48 _pool_id = osPoolCreate(&_pool_def);
emilmont 8:88a1a9c26ae3 49 }
mbed_official 31:015df9e602b6 50
emilmont 8:88a1a9c26ae3 51 /** Allocate a memory block of type T from a memory pool.
emilmont 8:88a1a9c26ae3 52 @return address of the allocated memory block or NULL in case of no memory available.
emilmont 8:88a1a9c26ae3 53 */
emilmont 8:88a1a9c26ae3 54 T* alloc(void) {
emilmont 8:88a1a9c26ae3 55 return (T*)osPoolAlloc(_pool_id);
emilmont 8:88a1a9c26ae3 56 }
mbed_official 31:015df9e602b6 57
emilmont 8:88a1a9c26ae3 58 /** Allocate a memory block of type T from a memory pool and set memory block to zero.
mbed_official 31:015df9e602b6 59 @return address of the allocated memory block or NULL in case of no memory available.
emilmont 8:88a1a9c26ae3 60 */
emilmont 8:88a1a9c26ae3 61 T* calloc(void) {
emilmont 8:88a1a9c26ae3 62 return (T*)osPoolCAlloc(_pool_id);
emilmont 8:88a1a9c26ae3 63 }
mbed_official 31:015df9e602b6 64
emilmont 8:88a1a9c26ae3 65 /** Return an allocated memory block back to a specific memory pool.
emilmont 8:88a1a9c26ae3 66 @param address of the allocated memory block that is returned to the memory pool.
mbed_official 31:015df9e602b6 67 @return status code that indicates the execution status of the function.
emilmont 8:88a1a9c26ae3 68 */
emilmont 8:88a1a9c26ae3 69 osStatus free(T *block) {
emilmont 8:88a1a9c26ae3 70 return osPoolFree(_pool_id, (void*)block);
emilmont 8:88a1a9c26ae3 71 }
emilmont 8:88a1a9c26ae3 72
emilmont 8:88a1a9c26ae3 73 private:
emilmont 8:88a1a9c26ae3 74 osPoolId _pool_id;
emilmont 8:88a1a9c26ae3 75 osPoolDef_t _pool_def;
emilmont 8:88a1a9c26ae3 76 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 77 uint32_t _pool_m[3+((sizeof(T)+3)/4)*(pool_sz)];
emilmont 8:88a1a9c26ae3 78 #endif
emilmont 8:88a1a9c26ae3 79 };
emilmont 8:88a1a9c26ae3 80
emilmont 8:88a1a9c26ae3 81 }
emilmont 8:88a1a9c26ae3 82 #endif