83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
/* mbed Microcontroller Library
|
|
* Copyright (c) 2006-2012 ARM Limited
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
#ifndef MEMORYPOOL_H
|
|
#define MEMORYPOOL_H
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "cmsis_os.h"
|
|
|
|
namespace rtos {
|
|
|
|
/** Define and manage fixed-size memory pools of objects of a given type.
|
|
@tparam T data type of a single object (element).
|
|
@tparam queue_sz maximum number of objects (elements) in the memory pool.
|
|
*/
|
|
template<typename T, uint32_t pool_sz>
|
|
class MemoryPool {
|
|
public:
|
|
/** Create and Initialize a memory pool. */
|
|
MemoryPool() {
|
|
#ifdef CMSIS_OS_RTX
|
|
memset(_pool_m, 0, sizeof(_pool_m));
|
|
_pool_def.pool = _pool_m;
|
|
|
|
_pool_def.pool_sz = pool_sz;
|
|
_pool_def.item_sz = sizeof(T);
|
|
#endif
|
|
_pool_id = osPoolCreate(&_pool_def);
|
|
}
|
|
|
|
/** Allocate a memory block of type T from a memory pool.
|
|
@return address of the allocated memory block or NULL in case of no memory available.
|
|
*/
|
|
T* alloc(void) {
|
|
return (T*)osPoolAlloc(_pool_id);
|
|
}
|
|
|
|
/** Allocate a memory block of type T from a memory pool and set memory block to zero.
|
|
@return address of the allocated memory block or NULL in case of no memory available.
|
|
*/
|
|
T* calloc(void) {
|
|
return (T*)osPoolCAlloc(_pool_id);
|
|
}
|
|
|
|
/** Return an allocated memory block back to a specific memory pool.
|
|
@param address of the allocated memory block that is returned to the memory pool.
|
|
@return status code that indicates the execution status of the function.
|
|
*/
|
|
osStatus free(T *block) {
|
|
return osPoolFree(_pool_id, (void*)block);
|
|
}
|
|
|
|
private:
|
|
osPoolId _pool_id;
|
|
osPoolDef_t _pool_def;
|
|
#ifdef CMSIS_OS_RTX
|
|
uint32_t _pool_m[3+((sizeof(T)+3)/4)*(pool_sz)];
|
|
#endif
|
|
};
|
|
|
|
}
|
|
#endif
|