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Dependencies:   PWM_Tone_Library DHT

mbed-rtos/rtos/Semaphore.h@5:569a4894abc1, 2019-03-08 (annotated)

Committer:
aziz111
Date:
Fri Mar 08 17:15:02 2019 +0000
Revision:
5:569a4894abc1
Parent:
3:78f223d34f36 
Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ethaderu 3:78f223d34f36 1 /* mbed Microcontroller Library
ethaderu 3:78f223d34f36 2 * Copyright (c) 2006-2012 ARM Limited
ethaderu 3:78f223d34f36 3 *
ethaderu 3:78f223d34f36 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
ethaderu 3:78f223d34f36 5 * of this software and associated documentation files (the "Software"), to deal
ethaderu 3:78f223d34f36 6 * in the Software without restriction, including without limitation the rights
ethaderu 3:78f223d34f36 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ethaderu 3:78f223d34f36 8 * copies of the Software, and to permit persons to whom the Software is
ethaderu 3:78f223d34f36 9 * furnished to do so, subject to the following conditions:
ethaderu 3:78f223d34f36 10 *
ethaderu 3:78f223d34f36 11 * The above copyright notice and this permission notice shall be included in
ethaderu 3:78f223d34f36 12 * all copies or substantial portions of the Software.
ethaderu 3:78f223d34f36 13 *
ethaderu 3:78f223d34f36 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ethaderu 3:78f223d34f36 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ethaderu 3:78f223d34f36 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ethaderu 3:78f223d34f36 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ethaderu 3:78f223d34f36 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ethaderu 3:78f223d34f36 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
ethaderu 3:78f223d34f36 20 * SOFTWARE.
ethaderu 3:78f223d34f36 21 */
ethaderu 3:78f223d34f36 22 #ifndef SEMAPHORE_H
ethaderu 3:78f223d34f36 23 #define SEMAPHORE_H
ethaderu 3:78f223d34f36 24
ethaderu 3:78f223d34f36 25 #include <stdint.h>
ethaderu 3:78f223d34f36 26 #include "cmsis_os.h"
ethaderu 3:78f223d34f36 27
ethaderu 3:78f223d34f36 28 namespace rtos {
ethaderu 3:78f223d34f36 29
ethaderu 3:78f223d34f36 30 /** The Semaphore class is used to manage and protect access to a set of shared resources. */
ethaderu 3:78f223d34f36 31 class Semaphore {
ethaderu 3:78f223d34f36 32 public:
ethaderu 3:78f223d34f36 33 /** Create and Initialize a Semaphore object used for managing resources.
ethaderu 3:78f223d34f36 34 @param number of available resources; maximum index value is (count-1).
ethaderu 3:78f223d34f36 35 */
ethaderu 3:78f223d34f36 36 Semaphore(int32_t count);
ethaderu 3:78f223d34f36 37
ethaderu 3:78f223d34f36 38 /** Wait until a Semaphore resource becomes available.
ethaderu 3:78f223d34f36 39 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
ethaderu 3:78f223d34f36 40 @return number of available tokens, or -1 in case of incorrect parameters
ethaderu 3:78f223d34f36 41 */
ethaderu 3:78f223d34f36 42 int32_t wait(uint32_t millisec=osWaitForever);
ethaderu 3:78f223d34f36 43
ethaderu 3:78f223d34f36 44 /** Release a Semaphore resource that was obtain with Semaphore::wait.
ethaderu 3:78f223d34f36 45 @return status code that indicates the execution status of the function.
ethaderu 3:78f223d34f36 46 */
ethaderu 3:78f223d34f36 47 osStatus release(void);
ethaderu 3:78f223d34f36 48
ethaderu 3:78f223d34f36 49 ~Semaphore();
ethaderu 3:78f223d34f36 50
ethaderu 3:78f223d34f36 51 private:
ethaderu 3:78f223d34f36 52 osSemaphoreId _osSemaphoreId;
ethaderu 3:78f223d34f36 53 osSemaphoreDef_t _osSemaphoreDef;
ethaderu 3:78f223d34f36 54 #ifdef CMSIS_OS_RTX
ethaderu 3:78f223d34f36 55 uint32_t _semaphore_data[2];
ethaderu 3:78f223d34f36 56 #endif
ethaderu 3:78f223d34f36 57 };
ethaderu 3:78f223d34f36 58
ethaderu 3:78f223d34f36 59 }
ethaderu 3:78f223d34f36 60 #endif