tool/mbed/mbed-sdk/libraries/rtos/rtos/Semaphore.cpp

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2012 ARM Limited
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22 #include "Semaphore.h"
  23
  24 #include <string.h>
  25
  26 namespace rtos {
  27
  28 Semaphore::Semaphore(int32_t count) {
  29 #ifdef CMSIS_OS_RTX
  30     memset(_semaphore_data, 0, sizeof(_semaphore_data));
  31     _osSemaphoreDef.semaphore = _semaphore_data;
  32 #endif
  33     _osSemaphoreId = osSemaphoreCreate(&_osSemaphoreDef, count);
  34 }
  35
  36 int32_t Semaphore::wait(uint32_t millisec) {
  37     return osSemaphoreWait(_osSemaphoreId, millisec);
  38 }
  39
  40 osStatus Semaphore::release(void) {
  41     return osSemaphoreRelease(_osSemaphoreId);
  42 }
  43
  44 Semaphore::~Semaphore() {
  45     osSemaphoreDelete(_osSemaphoreId);
  46 }
  47
  48 }