Donatien Garnier
MemoryPool.h@0:e6ccf0b3d718, 2012-05-31 (annotated)
- Committer:
- donatien
- Date:
- Thu May 31 15:46:30 2012 +0000
- Revision:
- 0:e6ccf0b3d718
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| donatien | 0:e6ccf0b3d718 | 1 | /* Copyright (c) 2012 mbed.org */ |
| donatien | 0:e6ccf0b3d718 | 2 | #ifndef MEMORYPOOL_H |
| donatien | 0:e6ccf0b3d718 | 3 | #define MEMORYPOOL_H |
| donatien | 0:e6ccf0b3d718 | 4 | |
| donatien | 0:e6ccf0b3d718 | 5 | #include <stdint.h> |
| donatien | 0:e6ccf0b3d718 | 6 | #include <string.h> |
| donatien | 0:e6ccf0b3d718 | 7 | |
| donatien | 0:e6ccf0b3d718 | 8 | #include "cmsis_os.h" |
| donatien | 0:e6ccf0b3d718 | 9 | |
| donatien | 0:e6ccf0b3d718 | 10 | namespace rtos { |
| donatien | 0:e6ccf0b3d718 | 11 | |
| donatien | 0:e6ccf0b3d718 | 12 | /*! Define and manage fixed-size memory pools of objects of a given type. |
| donatien | 0:e6ccf0b3d718 | 13 | \tparam T data type of a single object (element). |
| donatien | 0:e6ccf0b3d718 | 14 | \tparam queue_sz maximum number of objects (elements) in the memory pool. |
| donatien | 0:e6ccf0b3d718 | 15 | */ |
| donatien | 0:e6ccf0b3d718 | 16 | template<typename T, uint32_t pool_sz> |
| donatien | 0:e6ccf0b3d718 | 17 | class MemoryPool { |
| donatien | 0:e6ccf0b3d718 | 18 | public: |
| donatien | 0:e6ccf0b3d718 | 19 | /*! Create and Initialize a memory pool. */ |
| donatien | 0:e6ccf0b3d718 | 20 | MemoryPool() { |
| donatien | 0:e6ccf0b3d718 | 21 | #ifdef CMSIS_OS_RTX |
| donatien | 0:e6ccf0b3d718 | 22 | memset(_pool_m, 0, sizeof(_pool_m)); |
| donatien | 0:e6ccf0b3d718 | 23 | _pool_def.pool = _pool_m; |
| donatien | 0:e6ccf0b3d718 | 24 | |
| donatien | 0:e6ccf0b3d718 | 25 | _pool_def.pool_sz = pool_sz; |
| donatien | 0:e6ccf0b3d718 | 26 | _pool_def.item_sz = sizeof(T); |
| donatien | 0:e6ccf0b3d718 | 27 | #endif |
| donatien | 0:e6ccf0b3d718 | 28 | _pool_id = osPoolCreate(&_pool_def); |
| donatien | 0:e6ccf0b3d718 | 29 | } |
| donatien | 0:e6ccf0b3d718 | 30 | |
| donatien | 0:e6ccf0b3d718 | 31 | /*! Allocate a memory block of type T from a memory pool. |
| donatien | 0:e6ccf0b3d718 | 32 | \return address of the allocated memory block or NULL in case of no memory available. |
| donatien | 0:e6ccf0b3d718 | 33 | */ |
| donatien | 0:e6ccf0b3d718 | 34 | T* alloc(void) { |
| donatien | 0:e6ccf0b3d718 | 35 | return (T*)osPoolAlloc(_pool_id); |
| donatien | 0:e6ccf0b3d718 | 36 | } |
| donatien | 0:e6ccf0b3d718 | 37 | |
| donatien | 0:e6ccf0b3d718 | 38 | /*! Allocate a memory block of type T from a memory pool and set memory block to zero. |
| donatien | 0:e6ccf0b3d718 | 39 | \return address of the allocated memory block or NULL in case of no memory available. |
| donatien | 0:e6ccf0b3d718 | 40 | */ |
| donatien | 0:e6ccf0b3d718 | 41 | T* calloc(void) { |
| donatien | 0:e6ccf0b3d718 | 42 | return (T*)osPoolCAlloc(_pool_id); |
| donatien | 0:e6ccf0b3d718 | 43 | } |
| donatien | 0:e6ccf0b3d718 | 44 | |
| donatien | 0:e6ccf0b3d718 | 45 | /*! Return an allocated memory block back to a specific memory pool. |
| donatien | 0:e6ccf0b3d718 | 46 | \param address of the allocated memory block that is returned to the memory pool. |
| donatien | 0:e6ccf0b3d718 | 47 | \return status code that indicates the execution status of the function. |
| donatien | 0:e6ccf0b3d718 | 48 | */ |
| donatien | 0:e6ccf0b3d718 | 49 | osStatus free(T *block) { |
| donatien | 0:e6ccf0b3d718 | 50 | return osPoolFree(_pool_id, (void*)block); |
| donatien | 0:e6ccf0b3d718 | 51 | } |
| donatien | 0:e6ccf0b3d718 | 52 | |
| donatien | 0:e6ccf0b3d718 | 53 | private: |
| donatien | 0:e6ccf0b3d718 | 54 | osPoolId _pool_id; |
| donatien | 0:e6ccf0b3d718 | 55 | osPoolDef_t _pool_def; |
| donatien | 0:e6ccf0b3d718 | 56 | #ifdef CMSIS_OS_RTX |
| donatien | 0:e6ccf0b3d718 | 57 | uint32_t _pool_m[3+((sizeof(T)+3)/4)*(pool_sz)]; |
| donatien | 0:e6ccf0b3d718 | 58 | #endif |
| donatien | 0:e6ccf0b3d718 | 59 | }; |
| donatien | 0:e6ccf0b3d718 | 60 | |
| donatien | 0:e6ccf0b3d718 | 61 | } |
| donatien | 0:e6ccf0b3d718 | 62 | #endif |