z ysaito / 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@8:88a1a9c26ae3, 2012-11-27 (annotated)

Committer:
emilmont
Date:
Tue Nov 27 16:55:38 2012 +0000
Revision:
8:88a1a9c26ae3
Parent:
6:350b53afb889
Child:
35:b8555a5966f6
Add "Thread::get_state" method.; Update license.; Update documentation.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 8:88a1a9c26ae3 1 /* mbed Microcontroller Library
emilmont 8:88a1a9c26ae3 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 8:88a1a9c26ae3 3 *
emilmont 8:88a1a9c26ae3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 8:88a1a9c26ae3 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 8:88a1a9c26ae3 6 * in the Software without restriction, including without limitation the rights
emilmont 8:88a1a9c26ae3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 8:88a1a9c26ae3 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 8:88a1a9c26ae3 9 * furnished to do so, subject to the following conditions:
emilmont 8:88a1a9c26ae3 10 *
emilmont 8:88a1a9c26ae3 11 * The above copyright notice and this permission notice shall be included in
emilmont 8:88a1a9c26ae3 12 * all copies or substantial portions of the Software.
emilmont 8:88a1a9c26ae3 13 *
emilmont 8:88a1a9c26ae3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 8:88a1a9c26ae3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 8:88a1a9c26ae3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 8:88a1a9c26ae3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 8:88a1a9c26ae3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 8:88a1a9c26ae3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 8:88a1a9c26ae3 20 * SOFTWARE.
emilmont 8:88a1a9c26ae3 21 */
emilmont 8:88a1a9c26ae3 22 #include "Mutex.h"
emilmont 8:88a1a9c26ae3 23
emilmont 8:88a1a9c26ae3 24 #include <string.h>
emilmont 8:88a1a9c26ae3 25 #include "error.h"
emilmont 8:88a1a9c26ae3 26
emilmont 8:88a1a9c26ae3 27 namespace rtos {
emilmont 8:88a1a9c26ae3 28
emilmont 8:88a1a9c26ae3 29 Mutex::Mutex() {
emilmont 8:88a1a9c26ae3 30 #ifdef CMSIS_OS_RTX
emilmont 8:88a1a9c26ae3 31 memset(_mutex_data, 0, sizeof(_mutex_data));
emilmont 8:88a1a9c26ae3 32 _osMutexDef.mutex = _mutex_data;
emilmont 8:88a1a9c26ae3 33 #endif
emilmont 8:88a1a9c26ae3 34 _osMutexId = osMutexCreate(&_osMutexDef);
emilmont 8:88a1a9c26ae3 35 if (_osMutexId == NULL) {
emilmont 8:88a1a9c26ae3 36 error("Error initializing the mutex object\n");
emilmont 8:88a1a9c26ae3 37 }
emilmont 8:88a1a9c26ae3 38 }
emilmont 8:88a1a9c26ae3 39
emilmont 8:88a1a9c26ae3 40 osStatus Mutex::lock(uint32_t millisec) {
emilmont 8:88a1a9c26ae3 41 return osMutexWait(_osMutexId, millisec);
emilmont 8:88a1a9c26ae3 42 }
emilmont 8:88a1a9c26ae3 43
emilmont 8:88a1a9c26ae3 44 bool Mutex::trylock() {
emilmont 8:88a1a9c26ae3 45 return (osMutexWait(_osMutexId, 0) == osOK);
emilmont 8:88a1a9c26ae3 46 }
emilmont 8:88a1a9c26ae3 47
emilmont 8:88a1a9c26ae3 48 osStatus Mutex::unlock() {
emilmont 8:88a1a9c26ae3 49 return osMutexRelease(_osMutexId);
emilmont 8:88a1a9c26ae3 50 }
emilmont 8:88a1a9c26ae3 51
emilmont 8:88a1a9c26ae3 52 Mutex::~Mutex() {
emilmont 8:88a1a9c26ae3 53 osMutexDelete(_osMutexId);
emilmont 8:88a1a9c26ae3 54 }
emilmont 8:88a1a9c26ae3 55
emilmont 8:88a1a9c26ae3 56 }