Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

rtos/Mutex.cpp@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2012 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
elessair 0:f269e3021894 5 * of this software and associated documentation files (the "Software"), to deal
elessair 0:f269e3021894 6 * in the Software without restriction, including without limitation the rights
elessair 0:f269e3021894 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
elessair 0:f269e3021894 8 * copies of the Software, and to permit persons to whom the Software is
elessair 0:f269e3021894 9 * furnished to do so, subject to the following conditions:
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * The above copyright notice and this permission notice shall be included in
elessair 0:f269e3021894 12 * all copies or substantial portions of the Software.
elessair 0:f269e3021894 13 *
elessair 0:f269e3021894 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
elessair 0:f269e3021894 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
elessair 0:f269e3021894 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
elessair 0:f269e3021894 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
elessair 0:f269e3021894 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
elessair 0:f269e3021894 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
elessair 0:f269e3021894 20 * SOFTWARE.
elessair 0:f269e3021894 21 */
elessair 0:f269e3021894 22 #include "rtos/Mutex.h"
elessair 0:f269e3021894 23
elessair 0:f269e3021894 24 #include <string.h>
elessair 0:f269e3021894 25 #include "platform/mbed_error.h"
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 namespace rtos {
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 Mutex::Mutex() {
elessair 0:f269e3021894 30 #ifdef CMSIS_OS_RTX
elessair 0:f269e3021894 31 memset(_mutex_data, 0, sizeof(_mutex_data));
elessair 0:f269e3021894 32 _osMutexDef.mutex = _mutex_data;
elessair 0:f269e3021894 33 #endif
elessair 0:f269e3021894 34 _osMutexId = osMutexCreate(&_osMutexDef);
elessair 0:f269e3021894 35 if (_osMutexId == NULL) {
elessair 0:f269e3021894 36 error("Error initializing the mutex object\n");
elessair 0:f269e3021894 37 }
elessair 0:f269e3021894 38 }
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 osStatus Mutex::lock(uint32_t millisec) {
elessair 0:f269e3021894 41 return osMutexWait(_osMutexId, millisec);
elessair 0:f269e3021894 42 }
elessair 0:f269e3021894 43
elessair 0:f269e3021894 44 bool Mutex::trylock() {
elessair 0:f269e3021894 45 return (osMutexWait(_osMutexId, 0) == osOK);
elessair 0:f269e3021894 46 }
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 osStatus Mutex::unlock() {
elessair 0:f269e3021894 49 return osMutexRelease(_osMutexId);
elessair 0:f269e3021894 50 }
elessair 0:f269e3021894 51
elessair 0:f269e3021894 52 Mutex::~Mutex() {
elessair 0:f269e3021894 53 osMutexDelete(_osMutexId);
elessair 0:f269e3021894 54 }
elessair 0:f269e3021894 55
elessair 0:f269e3021894 56 }