Pierre Provent / USBHost

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Dependents:   TEST_USB_Nucleo_F429ZI Essais_USB_Nucleo_F429ZI SID_V3_Nucleo_F429ZI SID_V4_Nucleo_F429ZI_copy

mbed-rtos/rtos/Semaphore.h@0:77ca32e8e04e, 2020-09-25 (annotated)

Committer:
pierreprovent
Date:
Fri Sep 25 10:17:49 2020 +0000
Revision:
0:77ca32e8e04e
Programme acquisition en enregistrement sur clef USB carte Nucleo F429ZI cours ELE118 Cnam

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pierreprovent 0:77ca32e8e04e 1 /* mbed Microcontroller Library
pierreprovent 0:77ca32e8e04e 2 * Copyright (c) 2006-2012 ARM Limited
pierreprovent 0:77ca32e8e04e 3 *
pierreprovent 0:77ca32e8e04e 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
pierreprovent 0:77ca32e8e04e 5 * of this software and associated documentation files (the "Software"), to deal
pierreprovent 0:77ca32e8e04e 6 * in the Software without restriction, including without limitation the rights
pierreprovent 0:77ca32e8e04e 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
pierreprovent 0:77ca32e8e04e 8 * copies of the Software, and to permit persons to whom the Software is
pierreprovent 0:77ca32e8e04e 9 * furnished to do so, subject to the following conditions:
pierreprovent 0:77ca32e8e04e 10 *
pierreprovent 0:77ca32e8e04e 11 * The above copyright notice and this permission notice shall be included in
pierreprovent 0:77ca32e8e04e 12 * all copies or substantial portions of the Software.
pierreprovent 0:77ca32e8e04e 13 *
pierreprovent 0:77ca32e8e04e 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pierreprovent 0:77ca32e8e04e 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pierreprovent 0:77ca32e8e04e 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pierreprovent 0:77ca32e8e04e 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pierreprovent 0:77ca32e8e04e 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pierreprovent 0:77ca32e8e04e 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
pierreprovent 0:77ca32e8e04e 20 * SOFTWARE.
pierreprovent 0:77ca32e8e04e 21 */
pierreprovent 0:77ca32e8e04e 22 #ifndef SEMAPHORE_H
pierreprovent 0:77ca32e8e04e 23 #define SEMAPHORE_H
pierreprovent 0:77ca32e8e04e 24
pierreprovent 0:77ca32e8e04e 25 #include <stdint.h>
pierreprovent 0:77ca32e8e04e 26 #include "cmsis_os.h"
pierreprovent 0:77ca32e8e04e 27
pierreprovent 0:77ca32e8e04e 28 namespace rtos {
pierreprovent 0:77ca32e8e04e 29 /** \addtogroup rtos */
pierreprovent 0:77ca32e8e04e 30 /** @{*/
pierreprovent 0:77ca32e8e04e 31
pierreprovent 0:77ca32e8e04e 32 /** The Semaphore class is used to manage and protect access to a set of shared resources. */
pierreprovent 0:77ca32e8e04e 33 class Semaphore {
pierreprovent 0:77ca32e8e04e 34 public:
pierreprovent 0:77ca32e8e04e 35 /** Create and Initialize a Semaphore object used for managing resources.
pierreprovent 0:77ca32e8e04e 36 @param number of available resources; maximum index value is (count-1). (default: 0).
pierreprovent 0:77ca32e8e04e 37 */
pierreprovent 0:77ca32e8e04e 38 Semaphore(int32_t count=0);
pierreprovent 0:77ca32e8e04e 39
pierreprovent 0:77ca32e8e04e 40 /** Wait until a Semaphore resource becomes available.
pierreprovent 0:77ca32e8e04e 41 @param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
pierreprovent 0:77ca32e8e04e 42 @return number of available tokens, or -1 in case of incorrect parameters
pierreprovent 0:77ca32e8e04e 43 */
pierreprovent 0:77ca32e8e04e 44 int32_t wait(uint32_t millisec=osWaitForever);
pierreprovent 0:77ca32e8e04e 45
pierreprovent 0:77ca32e8e04e 46 /** Release a Semaphore resource that was obtain with Semaphore::wait.
pierreprovent 0:77ca32e8e04e 47 @return status code that indicates the execution status of the function.
pierreprovent 0:77ca32e8e04e 48 */
pierreprovent 0:77ca32e8e04e 49 osStatus release(void);
pierreprovent 0:77ca32e8e04e 50
pierreprovent 0:77ca32e8e04e 51 ~Semaphore();
pierreprovent 0:77ca32e8e04e 52
pierreprovent 0:77ca32e8e04e 53 private:
pierreprovent 0:77ca32e8e04e 54 osSemaphoreId _osSemaphoreId;
pierreprovent 0:77ca32e8e04e 55 osSemaphoreDef_t _osSemaphoreDef;
pierreprovent 0:77ca32e8e04e 56 #ifdef CMSIS_OS_RTX
pierreprovent 0:77ca32e8e04e 57 uint32_t _semaphore_data[2];
pierreprovent 0:77ca32e8e04e 58 #endif
pierreprovent 0:77ca32e8e04e 59 };
pierreprovent 0:77ca32e8e04e 60
pierreprovent 0:77ca32e8e04e 61 }
pierreprovent 0:77ca32e8e04e 62 #endif
pierreprovent 0:77ca32e8e04e 63
pierreprovent 0:77ca32e8e04e 64 /** @}*/