cebri alyac / mbed-rtos

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Dependents:   Asservissement_Gyro

rtos/Semaphore.h@0:77205fc699b9, 2022-05-08 (annotated)

Committer:
braichi13
Date:
Sun May 08 14:39:47 2022 +0000
Revision:
0:77205fc699b9
Programme du Gyropode

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braichi13 0:77205fc699b9 1 /* mbed Microcontroller Library
braichi13 0:77205fc699b9 2 * Copyright (c) 2006-2012 ARM Limited
braichi13 0:77205fc699b9 3 *
braichi13 0:77205fc699b9 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
braichi13 0:77205fc699b9 5 * of this software and associated documentation files (the "Software"), to deal
braichi13 0:77205fc699b9 6 * in the Software without restriction, including without limitation the rights
braichi13 0:77205fc699b9 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
braichi13 0:77205fc699b9 8 * copies of the Software, and to permit persons to whom the Software is
braichi13 0:77205fc699b9 9 * furnished to do so, subject to the following conditions:
braichi13 0:77205fc699b9 10 *
braichi13 0:77205fc699b9 11 * The above copyright notice and this permission notice shall be included in
braichi13 0:77205fc699b9 12 * all copies or substantial portions of the Software.
braichi13 0:77205fc699b9 13 *
braichi13 0:77205fc699b9 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
braichi13 0:77205fc699b9 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
braichi13 0:77205fc699b9 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
braichi13 0:77205fc699b9 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
braichi13 0:77205fc699b9 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
braichi13 0:77205fc699b9 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
braichi13 0:77205fc699b9 20 * SOFTWARE.
braichi13 0:77205fc699b9 21 */
braichi13 0:77205fc699b9 22 #ifndef SEMAPHORE_H
braichi13 0:77205fc699b9 23 #define SEMAPHORE_H
braichi13 0:77205fc699b9 24
braichi13 0:77205fc699b9 25 #include <stdint.h>
braichi13 0:77205fc699b9 26 #include "cmsis_os.h"
braichi13 0:77205fc699b9 27
braichi13 0:77205fc699b9 28 namespace rtos {
braichi13 0:77205fc699b9 29 /** \addtogroup rtos */
braichi13 0:77205fc699b9 30 /** @{*/
braichi13 0:77205fc699b9 31
braichi13 0:77205fc699b9 32 /** The Semaphore class is used to manage and protect access to a set of shared resources. */
braichi13 0:77205fc699b9 33 class Semaphore {
braichi13 0:77205fc699b9 34 public:
braichi13 0:77205fc699b9 35 /** Create and Initialize a Semaphore object used for managing resources.
braichi13 0:77205fc699b9 36 @param number of available resources; maximum index value is (count-1). (default: 0).
braichi13 0:77205fc699b9 37 */
braichi13 0:77205fc699b9 38 Semaphore(int32_t count=0);
braichi13 0:77205fc699b9 39
braichi13 0:77205fc699b9 40 /** Wait until a Semaphore resource becomes available.
braichi13 0:77205fc699b9 41 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
braichi13 0:77205fc699b9 42 @return number of available tokens, or -1 in case of incorrect parameters
braichi13 0:77205fc699b9 43 */
braichi13 0:77205fc699b9 44 int32_t wait(uint32_t millisec=osWaitForever);
braichi13 0:77205fc699b9 45
braichi13 0:77205fc699b9 46 /** Release a Semaphore resource that was obtain with Semaphore::wait.
braichi13 0:77205fc699b9 47 @return status code that indicates the execution status of the function.
braichi13 0:77205fc699b9 48 */
braichi13 0:77205fc699b9 49 osStatus release(void);
braichi13 0:77205fc699b9 50
braichi13 0:77205fc699b9 51 ~Semaphore();
braichi13 0:77205fc699b9 52
braichi13 0:77205fc699b9 53 private:
braichi13 0:77205fc699b9 54 osSemaphoreId _osSemaphoreId;
braichi13 0:77205fc699b9 55 osSemaphoreDef_t _osSemaphoreDef;
braichi13 0:77205fc699b9 56 #ifdef CMSIS_OS_RTX
braichi13 0:77205fc699b9 57 uint32_t _semaphore_data[2];
braichi13 0:77205fc699b9 58 #endif
braichi13 0:77205fc699b9 59 };
braichi13 0:77205fc699b9 60
braichi13 0:77205fc699b9 61 }
braichi13 0:77205fc699b9 62 #endif
braichi13 0:77205fc699b9 63
braichi13 0:77205fc699b9 64 /** @}*/