Official mbed Real Time Operating System based on the RTX implementation of the CMSIS-RTOS API open standard.
Dependents: denki-yohou_b TestY201 Network-RTOS NTPClient_HelloWorld ... more
Mutex.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2012 ARM Limited 00003 * 00004 * Permission is hereby granted, free of charge, to any person obtaining a copy 00005 * of this software and associated documentation files (the "Software"), to deal 00006 * in the Software without restriction, including without limitation the rights 00007 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00008 * copies of the Software, and to permit persons to whom the Software is 00009 * furnished to do so, subject to the following conditions: 00010 * 00011 * The above copyright notice and this permission notice shall be included in 00012 * all copies or substantial portions of the Software. 00013 * 00014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00015 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00016 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00017 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00018 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00019 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 00020 * SOFTWARE. 00021 */ 00022 #include "rtos/Mutex.h" 00023 00024 #include <string.h> 00025 #include "platform/mbed_error.h" 00026 00027 namespace rtos { 00028 00029 Mutex::Mutex() { 00030 #ifdef CMSIS_OS_RTX 00031 memset(_mutex_data, 0, sizeof(_mutex_data)); 00032 _osMutexDef.mutex = _mutex_data; 00033 #endif 00034 _osMutexId = osMutexCreate(&_osMutexDef); 00035 if (_osMutexId == NULL) { 00036 error("Error initializing the mutex object\n"); 00037 } 00038 } 00039 00040 osStatus Mutex::lock(uint32_t millisec) { 00041 return osMutexWait(_osMutexId, millisec); 00042 } 00043 00044 bool Mutex::trylock() { 00045 return (osMutexWait(_osMutexId, 0) == osOK); 00046 } 00047 00048 osStatus Mutex::unlock() { 00049 return osMutexRelease(_osMutexId); 00050 } 00051 00052 Mutex::~Mutex() { 00053 osMutexDelete(_osMutexId); 00054 } 00055 00056 }
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