Marco Mayer / Mbed OS Queue

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mbed-os/rtos/Semaphore.cpp@0:6bf0743ece18, 2020-03-28 (annotated)

Committer:
demayer
Date:
Sat Mar 28 15:28:19 2020 +0000
Revision:
0:6bf0743ece18
IMU Thread with an event-queue running parallel to handle tasks like a 5 times blinking LED. Button with interrupt detected.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
demayer 0:6bf0743ece18 1 /* mbed Microcontroller Library
demayer 0:6bf0743ece18 2 * Copyright (c) 2006-2012 ARM Limited
demayer 0:6bf0743ece18 3 *
demayer 0:6bf0743ece18 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
demayer 0:6bf0743ece18 5 * of this software and associated documentation files (the "Software"), to deal
demayer 0:6bf0743ece18 6 * in the Software without restriction, including without limitation the rights
demayer 0:6bf0743ece18 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
demayer 0:6bf0743ece18 8 * copies of the Software, and to permit persons to whom the Software is
demayer 0:6bf0743ece18 9 * furnished to do so, subject to the following conditions:
demayer 0:6bf0743ece18 10 *
demayer 0:6bf0743ece18 11 * The above copyright notice and this permission notice shall be included in
demayer 0:6bf0743ece18 12 * all copies or substantial portions of the Software.
demayer 0:6bf0743ece18 13 *
demayer 0:6bf0743ece18 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
demayer 0:6bf0743ece18 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
demayer 0:6bf0743ece18 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
demayer 0:6bf0743ece18 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
demayer 0:6bf0743ece18 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
demayer 0:6bf0743ece18 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
demayer 0:6bf0743ece18 20 * SOFTWARE.
demayer 0:6bf0743ece18 21 */
demayer 0:6bf0743ece18 22 #include "rtos/Semaphore.h"
demayer 0:6bf0743ece18 23 #include "platform/mbed_assert.h"
demayer 0:6bf0743ece18 24
demayer 0:6bf0743ece18 25 #include <string.h>
demayer 0:6bf0743ece18 26
demayer 0:6bf0743ece18 27 namespace rtos {
demayer 0:6bf0743ece18 28
demayer 0:6bf0743ece18 29 Semaphore::Semaphore(int32_t count) {
demayer 0:6bf0743ece18 30 constructor(count, 0xffff);
demayer 0:6bf0743ece18 31 }
demayer 0:6bf0743ece18 32
demayer 0:6bf0743ece18 33 Semaphore::Semaphore(int32_t count, uint16_t max_count) {
demayer 0:6bf0743ece18 34 constructor(count, max_count);
demayer 0:6bf0743ece18 35 }
demayer 0:6bf0743ece18 36
demayer 0:6bf0743ece18 37 void Semaphore::constructor(int32_t count, uint16_t max_count) {
demayer 0:6bf0743ece18 38 memset(&_obj_mem, 0, sizeof(_obj_mem));
demayer 0:6bf0743ece18 39 osSemaphoreAttr_t attr = { 0 };
demayer 0:6bf0743ece18 40 attr.cb_mem = &_obj_mem;
demayer 0:6bf0743ece18 41 attr.cb_size = sizeof(_obj_mem);
demayer 0:6bf0743ece18 42 _id = osSemaphoreNew(max_count, count, &attr);
demayer 0:6bf0743ece18 43 MBED_ASSERT(_id != NULL);
demayer 0:6bf0743ece18 44 }
demayer 0:6bf0743ece18 45
demayer 0:6bf0743ece18 46 int32_t Semaphore::wait(uint32_t millisec) {
demayer 0:6bf0743ece18 47 osStatus_t stat = osSemaphoreAcquire(_id, millisec);
demayer 0:6bf0743ece18 48 switch (stat) {
demayer 0:6bf0743ece18 49 case osOK:
demayer 0:6bf0743ece18 50 return osSemaphoreGetCount(_id) + 1;
demayer 0:6bf0743ece18 51 case osErrorTimeout:
demayer 0:6bf0743ece18 52 case osErrorResource:
demayer 0:6bf0743ece18 53 return 0;
demayer 0:6bf0743ece18 54 case osErrorParameter:
demayer 0:6bf0743ece18 55 default:
demayer 0:6bf0743ece18 56 return -1;
demayer 0:6bf0743ece18 57 }
demayer 0:6bf0743ece18 58 }
demayer 0:6bf0743ece18 59
demayer 0:6bf0743ece18 60 osStatus Semaphore::release(void) {
demayer 0:6bf0743ece18 61 return osSemaphoreRelease(_id);
demayer 0:6bf0743ece18 62 }
demayer 0:6bf0743ece18 63
demayer 0:6bf0743ece18 64 Semaphore::~Semaphore() {
demayer 0:6bf0743ece18 65 osSemaphoreDelete(_id);
demayer 0:6bf0743ece18 66 }
demayer 0:6bf0743ece18 67
demayer 0:6bf0743ece18 68 }