BA / Mbed OS BaBoRo_test2

mbed-os/rtos/Semaphore.cpp@0:02dd72d1d465, 2018-04-24 (annotated)

Committer:
borlanic
Date:
Tue Apr 24 11:45:18 2018 +0000
Revision:
0:02dd72d1d465
BaBoRo_test2 - backup 1

Who changed what in which revision?

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borlanic 0:02dd72d1d465 1 /* mbed Microcontroller Library
borlanic 0:02dd72d1d465 2 * Copyright (c) 2006-2012 ARM Limited
borlanic 0:02dd72d1d465 3 *
borlanic 0:02dd72d1d465 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
borlanic 0:02dd72d1d465 5 * of this software and associated documentation files (the "Software"), to deal
borlanic 0:02dd72d1d465 6 * in the Software without restriction, including without limitation the rights
borlanic 0:02dd72d1d465 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
borlanic 0:02dd72d1d465 8 * copies of the Software, and to permit persons to whom the Software is
borlanic 0:02dd72d1d465 9 * furnished to do so, subject to the following conditions:
borlanic 0:02dd72d1d465 10 *
borlanic 0:02dd72d1d465 11 * The above copyright notice and this permission notice shall be included in
borlanic 0:02dd72d1d465 12 * all copies or substantial portions of the Software.
borlanic 0:02dd72d1d465 13 *
borlanic 0:02dd72d1d465 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
borlanic 0:02dd72d1d465 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
borlanic 0:02dd72d1d465 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
borlanic 0:02dd72d1d465 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
borlanic 0:02dd72d1d465 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
borlanic 0:02dd72d1d465 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
borlanic 0:02dd72d1d465 20 * SOFTWARE.
borlanic 0:02dd72d1d465 21 */
borlanic 0:02dd72d1d465 22 #include "rtos/Semaphore.h"
borlanic 0:02dd72d1d465 23 #include "rtos/Kernel.h"
borlanic 0:02dd72d1d465 24 #include "platform/mbed_assert.h"
borlanic 0:02dd72d1d465 25
borlanic 0:02dd72d1d465 26 #include <string.h>
borlanic 0:02dd72d1d465 27
borlanic 0:02dd72d1d465 28 namespace rtos {
borlanic 0:02dd72d1d465 29
borlanic 0:02dd72d1d465 30 Semaphore::Semaphore(int32_t count) {
borlanic 0:02dd72d1d465 31 constructor(count, 0xffff);
borlanic 0:02dd72d1d465 32 }
borlanic 0:02dd72d1d465 33
borlanic 0:02dd72d1d465 34 Semaphore::Semaphore(int32_t count, uint16_t max_count) {
borlanic 0:02dd72d1d465 35 constructor(count, max_count);
borlanic 0:02dd72d1d465 36 }
borlanic 0:02dd72d1d465 37
borlanic 0:02dd72d1d465 38 void Semaphore::constructor(int32_t count, uint16_t max_count) {
borlanic 0:02dd72d1d465 39 memset(&_obj_mem, 0, sizeof(_obj_mem));
borlanic 0:02dd72d1d465 40 osSemaphoreAttr_t attr = { 0 };
borlanic 0:02dd72d1d465 41 attr.cb_mem = &_obj_mem;
borlanic 0:02dd72d1d465 42 attr.cb_size = sizeof(_obj_mem);
borlanic 0:02dd72d1d465 43 _id = osSemaphoreNew(max_count, count, &attr);
borlanic 0:02dd72d1d465 44 MBED_ASSERT(_id != NULL);
borlanic 0:02dd72d1d465 45 }
borlanic 0:02dd72d1d465 46
borlanic 0:02dd72d1d465 47 int32_t Semaphore::wait(uint32_t millisec) {
borlanic 0:02dd72d1d465 48 osStatus_t stat = osSemaphoreAcquire(_id, millisec);
borlanic 0:02dd72d1d465 49 switch (stat) {
borlanic 0:02dd72d1d465 50 case osOK:
borlanic 0:02dd72d1d465 51 return osSemaphoreGetCount(_id) + 1;
borlanic 0:02dd72d1d465 52 case osErrorTimeout:
borlanic 0:02dd72d1d465 53 case osErrorResource:
borlanic 0:02dd72d1d465 54 return 0;
borlanic 0:02dd72d1d465 55 case osErrorParameter:
borlanic 0:02dd72d1d465 56 default:
borlanic 0:02dd72d1d465 57 return -1;
borlanic 0:02dd72d1d465 58 }
borlanic 0:02dd72d1d465 59 }
borlanic 0:02dd72d1d465 60
borlanic 0:02dd72d1d465 61 int32_t Semaphore::wait_until(uint64_t millisec) {
borlanic 0:02dd72d1d465 62 uint64_t now = Kernel::get_ms_count();
borlanic 0:02dd72d1d465 63
borlanic 0:02dd72d1d465 64 if (now >= millisec) {
borlanic 0:02dd72d1d465 65 return wait(0);
borlanic 0:02dd72d1d465 66 } else if (millisec - now >= osWaitForever) {
borlanic 0:02dd72d1d465 67 // API permits early return
borlanic 0:02dd72d1d465 68 return wait(osWaitForever - 1);
borlanic 0:02dd72d1d465 69 } else {
borlanic 0:02dd72d1d465 70 return wait(millisec - now);
borlanic 0:02dd72d1d465 71 }
borlanic 0:02dd72d1d465 72 }
borlanic 0:02dd72d1d465 73
borlanic 0:02dd72d1d465 74 osStatus Semaphore::release(void) {
borlanic 0:02dd72d1d465 75 return osSemaphoreRelease(_id);
borlanic 0:02dd72d1d465 76 }
borlanic 0:02dd72d1d465 77
borlanic 0:02dd72d1d465 78 Semaphore::~Semaphore() {
borlanic 0:02dd72d1d465 79 osSemaphoreDelete(_id);
borlanic 0:02dd72d1d465 80 }
borlanic 0:02dd72d1d465 81
borlanic 0:02dd72d1d465 82 }