Nicolas Borla / Mbed OS ROME2_Robot_Firmware

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mbed-os/rtos/Mutex.cpp@0:4beb2ea291ec, 2020-03-16 (annotated)

Committer:
boro
Date:
Mon Mar 16 13:12:31 2020 +0000
Revision:
0:4beb2ea291ec
a

Who changed what in which revision?

UserRevisionLine numberNew contents of line
boro 0:4beb2ea291ec 1 /* mbed Microcontroller Library
boro 0:4beb2ea291ec 2 * Copyright (c) 2006-2012 ARM Limited
boro 0:4beb2ea291ec 3 *
boro 0:4beb2ea291ec 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
boro 0:4beb2ea291ec 5 * of this software and associated documentation files (the "Software"), to deal
boro 0:4beb2ea291ec 6 * in the Software without restriction, including without limitation the rights
boro 0:4beb2ea291ec 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
boro 0:4beb2ea291ec 8 * copies of the Software, and to permit persons to whom the Software is
boro 0:4beb2ea291ec 9 * furnished to do so, subject to the following conditions:
boro 0:4beb2ea291ec 10 *
boro 0:4beb2ea291ec 11 * The above copyright notice and this permission notice shall be included in
boro 0:4beb2ea291ec 12 * all copies or substantial portions of the Software.
boro 0:4beb2ea291ec 13 *
boro 0:4beb2ea291ec 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
boro 0:4beb2ea291ec 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
boro 0:4beb2ea291ec 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
boro 0:4beb2ea291ec 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
boro 0:4beb2ea291ec 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
boro 0:4beb2ea291ec 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
boro 0:4beb2ea291ec 20 * SOFTWARE.
boro 0:4beb2ea291ec 21 */
boro 0:4beb2ea291ec 22 #include "rtos/Mutex.h"
boro 0:4beb2ea291ec 23
boro 0:4beb2ea291ec 24 #include <string.h>
boro 0:4beb2ea291ec 25 #include "mbed_error.h"
boro 0:4beb2ea291ec 26 #include "mbed_assert.h"
boro 0:4beb2ea291ec 27
boro 0:4beb2ea291ec 28 namespace rtos {
boro 0:4beb2ea291ec 29
boro 0:4beb2ea291ec 30 Mutex::Mutex(): _count(0)
boro 0:4beb2ea291ec 31 {
boro 0:4beb2ea291ec 32 constructor();
boro 0:4beb2ea291ec 33 }
boro 0:4beb2ea291ec 34
boro 0:4beb2ea291ec 35 Mutex::Mutex(const char *name)
boro 0:4beb2ea291ec 36 {
boro 0:4beb2ea291ec 37 constructor(name);
boro 0:4beb2ea291ec 38 }
boro 0:4beb2ea291ec 39
boro 0:4beb2ea291ec 40 void Mutex::constructor(const char *name)
boro 0:4beb2ea291ec 41 {
boro 0:4beb2ea291ec 42 memset(&_obj_mem, 0, sizeof(_obj_mem));
boro 0:4beb2ea291ec 43 osMutexAttr_t attr = { 0 };
boro 0:4beb2ea291ec 44 attr.name = name ? name : "aplication_unnamed_mutex";
boro 0:4beb2ea291ec 45 attr.cb_mem = &_obj_mem;
boro 0:4beb2ea291ec 46 attr.cb_size = sizeof(_obj_mem);
boro 0:4beb2ea291ec 47 attr.attr_bits = osMutexRecursive | osMutexPrioInherit | osMutexRobust;
boro 0:4beb2ea291ec 48 _id = osMutexNew(&attr);
boro 0:4beb2ea291ec 49 MBED_ASSERT(_id);
boro 0:4beb2ea291ec 50 }
boro 0:4beb2ea291ec 51
boro 0:4beb2ea291ec 52 osStatus Mutex::lock(uint32_t millisec) {
boro 0:4beb2ea291ec 53 osStatus status = osMutexAcquire(_id, millisec);
boro 0:4beb2ea291ec 54 if (osOK == status) {
boro 0:4beb2ea291ec 55 _count++;
boro 0:4beb2ea291ec 56 }
boro 0:4beb2ea291ec 57 return status;
boro 0:4beb2ea291ec 58 }
boro 0:4beb2ea291ec 59
boro 0:4beb2ea291ec 60 bool Mutex::trylock() {
boro 0:4beb2ea291ec 61 if (osMutexAcquire(_id, 0) == osOK) {
boro 0:4beb2ea291ec 62 _count++;
boro 0:4beb2ea291ec 63 return true;
boro 0:4beb2ea291ec 64 } else {
boro 0:4beb2ea291ec 65 return false;
boro 0:4beb2ea291ec 66 }
boro 0:4beb2ea291ec 67 }
boro 0:4beb2ea291ec 68
boro 0:4beb2ea291ec 69 osStatus Mutex::unlock() {
boro 0:4beb2ea291ec 70 _count--;
boro 0:4beb2ea291ec 71 return osMutexRelease(_id);
boro 0:4beb2ea291ec 72 }
boro 0:4beb2ea291ec 73
boro 0:4beb2ea291ec 74 osThreadId Mutex::get_owner() {
boro 0:4beb2ea291ec 75 return osMutexGetOwner(_id);
boro 0:4beb2ea291ec 76 }
boro 0:4beb2ea291ec 77
boro 0:4beb2ea291ec 78 Mutex::~Mutex() {
boro 0:4beb2ea291ec 79 osMutexDelete(_id);
boro 0:4beb2ea291ec 80 }
boro 0:4beb2ea291ec 81
boro 0:4beb2ea291ec 82 }