Dream team / mbed-rtos

Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.

Fork of mbed-rtos by mbed official

rtos/Mutex.cpp@111:de54bc598ef1, 2016-04-29 (annotated)

Committer:
acarter2
Date:
Fri Apr 29 14:04:02 2016 +0000
Revision:
111:de54bc598ef1
current code 2;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
acarter2 111:de54bc598ef1 1 /* mbed Microcontroller Library
acarter2 111:de54bc598ef1 2 * Copyright (c) 2006-2012 ARM Limited
acarter2 111:de54bc598ef1 3 *
acarter2 111:de54bc598ef1 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
acarter2 111:de54bc598ef1 5 * of this software and associated documentation files (the "Software"), to deal
acarter2 111:de54bc598ef1 6 * in the Software without restriction, including without limitation the rights
acarter2 111:de54bc598ef1 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
acarter2 111:de54bc598ef1 8 * copies of the Software, and to permit persons to whom the Software is
acarter2 111:de54bc598ef1 9 * furnished to do so, subject to the following conditions:
acarter2 111:de54bc598ef1 10 *
acarter2 111:de54bc598ef1 11 * The above copyright notice and this permission notice shall be included in
acarter2 111:de54bc598ef1 12 * all copies or substantial portions of the Software.
acarter2 111:de54bc598ef1 13 *
acarter2 111:de54bc598ef1 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
acarter2 111:de54bc598ef1 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
acarter2 111:de54bc598ef1 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
acarter2 111:de54bc598ef1 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
acarter2 111:de54bc598ef1 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
acarter2 111:de54bc598ef1 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
acarter2 111:de54bc598ef1 20 * SOFTWARE.
acarter2 111:de54bc598ef1 21 */
acarter2 111:de54bc598ef1 22 #include "Mutex.h"
acarter2 111:de54bc598ef1 23
acarter2 111:de54bc598ef1 24 #include <string.h>
acarter2 111:de54bc598ef1 25 #include "mbed_error.h"
acarter2 111:de54bc598ef1 26
acarter2 111:de54bc598ef1 27 namespace rtos {
acarter2 111:de54bc598ef1 28
acarter2 111:de54bc598ef1 29 Mutex::Mutex() {
acarter2 111:de54bc598ef1 30 #ifdef CMSIS_OS_RTX
acarter2 111:de54bc598ef1 31 memset(_mutex_data, 0, sizeof(_mutex_data));
acarter2 111:de54bc598ef1 32 _osMutexDef.mutex = _mutex_data;
acarter2 111:de54bc598ef1 33 #endif
acarter2 111:de54bc598ef1 34 _osMutexId = osMutexCreate(&_osMutexDef);
acarter2 111:de54bc598ef1 35 if (_osMutexId == NULL) {
acarter2 111:de54bc598ef1 36 error("Error initializing the mutex object\n");
acarter2 111:de54bc598ef1 37 }
acarter2 111:de54bc598ef1 38 }
acarter2 111:de54bc598ef1 39
acarter2 111:de54bc598ef1 40 osStatus Mutex::lock(uint32_t millisec) {
acarter2 111:de54bc598ef1 41 return osMutexWait(_osMutexId, millisec);
acarter2 111:de54bc598ef1 42 }
acarter2 111:de54bc598ef1 43
acarter2 111:de54bc598ef1 44 bool Mutex::trylock() {
acarter2 111:de54bc598ef1 45 return (osMutexWait(_osMutexId, 0) == osOK);
acarter2 111:de54bc598ef1 46 }
acarter2 111:de54bc598ef1 47
acarter2 111:de54bc598ef1 48 osStatus Mutex::unlock() {
acarter2 111:de54bc598ef1 49 return osMutexRelease(_osMutexId);
acarter2 111:de54bc598ef1 50 }
acarter2 111:de54bc598ef1 51
acarter2 111:de54bc598ef1 52 Mutex::~Mutex() {
acarter2 111:de54bc598ef1 53 osMutexDelete(_osMutexId);
acarter2 111:de54bc598ef1 54 }
acarter2 111:de54bc598ef1 55
acarter2 111:de54bc598ef1 56 }