Department of Electrical Eng University of Moratuwa / Mbed 2 deprecated Theekshana_AI_data

rtos sd encoder systems

Dependencies:   mbed

mbed-rtos/rtos/Semaphore.h@0:5459cdde6298, 2019-08-01 (annotated)

Committer:
eembed
Date:
Thu Aug 01 08:00:33 2019 +0000
Revision:
0:5459cdde6298
first commit

Who changed what in which revision?

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eembed 0:5459cdde6298 1 /* mbed Microcontroller Library
eembed 0:5459cdde6298 2 * Copyright (c) 2006-2012 ARM Limited
eembed 0:5459cdde6298 3 *
eembed 0:5459cdde6298 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
eembed 0:5459cdde6298 5 * of this software and associated documentation files (the "Software"), to deal
eembed 0:5459cdde6298 6 * in the Software without restriction, including without limitation the rights
eembed 0:5459cdde6298 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
eembed 0:5459cdde6298 8 * copies of the Software, and to permit persons to whom the Software is
eembed 0:5459cdde6298 9 * furnished to do so, subject to the following conditions:
eembed 0:5459cdde6298 10 *
eembed 0:5459cdde6298 11 * The above copyright notice and this permission notice shall be included in
eembed 0:5459cdde6298 12 * all copies or substantial portions of the Software.
eembed 0:5459cdde6298 13 *
eembed 0:5459cdde6298 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
eembed 0:5459cdde6298 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
eembed 0:5459cdde6298 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
eembed 0:5459cdde6298 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
eembed 0:5459cdde6298 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
eembed 0:5459cdde6298 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
eembed 0:5459cdde6298 20 * SOFTWARE.
eembed 0:5459cdde6298 21 */
eembed 0:5459cdde6298 22 #ifndef SEMAPHORE_H
eembed 0:5459cdde6298 23 #define SEMAPHORE_H
eembed 0:5459cdde6298 24
eembed 0:5459cdde6298 25 #include <stdint.h>
eembed 0:5459cdde6298 26 #include "cmsis_os.h"
eembed 0:5459cdde6298 27
eembed 0:5459cdde6298 28 namespace rtos {
eembed 0:5459cdde6298 29
eembed 0:5459cdde6298 30 /** The Semaphore class is used to manage and protect access to a set of shared resources. */
eembed 0:5459cdde6298 31 class Semaphore {
eembed 0:5459cdde6298 32 public:
eembed 0:5459cdde6298 33 /** Create and Initialize a Semaphore object used for managing resources.
eembed 0:5459cdde6298 34 @param number of available resources; maximum index value is (count-1).
eembed 0:5459cdde6298 35 */
eembed 0:5459cdde6298 36 Semaphore(int32_t count);
eembed 0:5459cdde6298 37
eembed 0:5459cdde6298 38 /** Wait until a Semaphore resource becomes available.
eembed 0:5459cdde6298 39 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
eembed 0:5459cdde6298 40 @return number of available tokens, or -1 in case of incorrect parameters
eembed 0:5459cdde6298 41 */
eembed 0:5459cdde6298 42 int32_t wait(uint32_t millisec=osWaitForever);
eembed 0:5459cdde6298 43
eembed 0:5459cdde6298 44 /** Release a Semaphore resource that was obtain with Semaphore::wait.
eembed 0:5459cdde6298 45 @return status code that indicates the execution status of the function.
eembed 0:5459cdde6298 46 */
eembed 0:5459cdde6298 47 osStatus release(void);
eembed 0:5459cdde6298 48
eembed 0:5459cdde6298 49 ~Semaphore();
eembed 0:5459cdde6298 50
eembed 0:5459cdde6298 51 private:
eembed 0:5459cdde6298 52 osSemaphoreId _osSemaphoreId;
eembed 0:5459cdde6298 53 osSemaphoreDef_t _osSemaphoreDef;
eembed 0:5459cdde6298 54 #ifdef CMSIS_OS_RTX
eembed 0:5459cdde6298 55 uint32_t _semaphore_data[2];
eembed 0:5459cdde6298 56 #endif
eembed 0:5459cdde6298 57 };
eembed 0:5459cdde6298 58
eembed 0:5459cdde6298 59 }
eembed 0:5459cdde6298 60 #endif