Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/rtos/Mutex.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

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marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2006-2012 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
marcozecchini 0:9fca2b23d0ba 5 * of this software and associated documentation files (the "Software"), to deal
marcozecchini 0:9fca2b23d0ba 6 * in the Software without restriction, including without limitation the rights
marcozecchini 0:9fca2b23d0ba 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
marcozecchini 0:9fca2b23d0ba 8 * copies of the Software, and to permit persons to whom the Software is
marcozecchini 0:9fca2b23d0ba 9 * furnished to do so, subject to the following conditions:
marcozecchini 0:9fca2b23d0ba 10 *
marcozecchini 0:9fca2b23d0ba 11 * The above copyright notice and this permission notice shall be included in
marcozecchini 0:9fca2b23d0ba 12 * all copies or substantial portions of the Software.
marcozecchini 0:9fca2b23d0ba 13 *
marcozecchini 0:9fca2b23d0ba 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
marcozecchini 0:9fca2b23d0ba 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
marcozecchini 0:9fca2b23d0ba 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
marcozecchini 0:9fca2b23d0ba 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
marcozecchini 0:9fca2b23d0ba 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
marcozecchini 0:9fca2b23d0ba 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
marcozecchini 0:9fca2b23d0ba 20 * SOFTWARE.
marcozecchini 0:9fca2b23d0ba 21 */
marcozecchini 0:9fca2b23d0ba 22 #include "rtos/Mutex.h"
marcozecchini 0:9fca2b23d0ba 23
marcozecchini 0:9fca2b23d0ba 24 #include <string.h>
marcozecchini 0:9fca2b23d0ba 25 #include "mbed_error.h"
marcozecchini 0:9fca2b23d0ba 26 #include "mbed_assert.h"
marcozecchini 0:9fca2b23d0ba 27
marcozecchini 0:9fca2b23d0ba 28 namespace rtos {
marcozecchini 0:9fca2b23d0ba 29
marcozecchini 0:9fca2b23d0ba 30 Mutex::Mutex(): _count(0)
marcozecchini 0:9fca2b23d0ba 31 {
marcozecchini 0:9fca2b23d0ba 32 constructor();
marcozecchini 0:9fca2b23d0ba 33 }
marcozecchini 0:9fca2b23d0ba 34
marcozecchini 0:9fca2b23d0ba 35 Mutex::Mutex(const char *name)
marcozecchini 0:9fca2b23d0ba 36 {
marcozecchini 0:9fca2b23d0ba 37 constructor(name);
marcozecchini 0:9fca2b23d0ba 38 }
marcozecchini 0:9fca2b23d0ba 39
marcozecchini 0:9fca2b23d0ba 40 void Mutex::constructor(const char *name)
marcozecchini 0:9fca2b23d0ba 41 {
marcozecchini 0:9fca2b23d0ba 42 memset(&_obj_mem, 0, sizeof(_obj_mem));
marcozecchini 0:9fca2b23d0ba 43 osMutexAttr_t attr = { 0 };
marcozecchini 0:9fca2b23d0ba 44 attr.name = name ? name : "aplication_unnamed_mutex";
marcozecchini 0:9fca2b23d0ba 45 attr.cb_mem = &_obj_mem;
marcozecchini 0:9fca2b23d0ba 46 attr.cb_size = sizeof(_obj_mem);
marcozecchini 0:9fca2b23d0ba 47 attr.attr_bits = osMutexRecursive | osMutexPrioInherit | osMutexRobust;
marcozecchini 0:9fca2b23d0ba 48 _id = osMutexNew(&attr);
marcozecchini 0:9fca2b23d0ba 49 MBED_ASSERT(_id);
marcozecchini 0:9fca2b23d0ba 50 }
marcozecchini 0:9fca2b23d0ba 51
marcozecchini 0:9fca2b23d0ba 52 osStatus Mutex::lock(uint32_t millisec) {
marcozecchini 0:9fca2b23d0ba 53 osStatus status = osMutexAcquire(_id, millisec);
marcozecchini 0:9fca2b23d0ba 54 if (osOK == status) {
marcozecchini 0:9fca2b23d0ba 55 _count++;
marcozecchini 0:9fca2b23d0ba 56 }
marcozecchini 0:9fca2b23d0ba 57 return status;
marcozecchini 0:9fca2b23d0ba 58 }
marcozecchini 0:9fca2b23d0ba 59
marcozecchini 0:9fca2b23d0ba 60 bool Mutex::trylock() {
marcozecchini 0:9fca2b23d0ba 61 if (osMutexAcquire(_id, 0) == osOK) {
marcozecchini 0:9fca2b23d0ba 62 _count++;
marcozecchini 0:9fca2b23d0ba 63 return true;
marcozecchini 0:9fca2b23d0ba 64 } else {
marcozecchini 0:9fca2b23d0ba 65 return false;
marcozecchini 0:9fca2b23d0ba 66 }
marcozecchini 0:9fca2b23d0ba 67 }
marcozecchini 0:9fca2b23d0ba 68
marcozecchini 0:9fca2b23d0ba 69 osStatus Mutex::unlock() {
marcozecchini 0:9fca2b23d0ba 70 _count--;
marcozecchini 0:9fca2b23d0ba 71 return osMutexRelease(_id);
marcozecchini 0:9fca2b23d0ba 72 }
marcozecchini 0:9fca2b23d0ba 73
marcozecchini 0:9fca2b23d0ba 74 osThreadId Mutex::get_owner() {
marcozecchini 0:9fca2b23d0ba 75 return osMutexGetOwner(_id);
marcozecchini 0:9fca2b23d0ba 76 }
marcozecchini 0:9fca2b23d0ba 77
marcozecchini 0:9fca2b23d0ba 78 Mutex::~Mutex() {
marcozecchini 0:9fca2b23d0ba 79 osMutexDelete(_id);
marcozecchini 0:9fca2b23d0ba 80 }
marcozecchini 0:9fca2b23d0ba 81
marcozecchini 0:9fca2b23d0ba 82 }