Nathan Gay / mbed-rtos-fork

Lab4 RTOS

Fork of mbed-rtos by mbed official

rtos/Semaphore.h@6:350b53afb889, 2012-11-23 (annotated)

Committer:
emilmont
Date:
Fri Nov 23 09:57:31 2012 +0000
Revision:
6:350b53afb889
Child:
8:88a1a9c26ae3
Merge RTOS C++ API and RTX under the same library; Update RTX to version 4.60; Add proper Thread destructor;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 6:350b53afb889 1 /* Copyright (c) 2012 mbed.org */
emilmont 6:350b53afb889 2 #ifndef SEMAPHORE_H
emilmont 6:350b53afb889 3 #define SEMAPHORE_H
emilmont 6:350b53afb889 4
emilmont 6:350b53afb889 5 #include <stdint.h>
emilmont 6:350b53afb889 6 #include "cmsis_os.h"
emilmont 6:350b53afb889 7
emilmont 6:350b53afb889 8 namespace rtos {
emilmont 6:350b53afb889 9
emilmont 6:350b53afb889 10 /*! The Semaphore class is used to manage and protect access to a set of shared resources. */
emilmont 6:350b53afb889 11 class Semaphore {
emilmont 6:350b53afb889 12 public:
emilmont 6:350b53afb889 13 /*! Create and Initialize a Semaphore object used for managing resources.
emilmont 6:350b53afb889 14 \param number of available resources; maximum index value is (count-1).
emilmont 6:350b53afb889 15 */
emilmont 6:350b53afb889 16 Semaphore(int32_t count);
emilmont 6:350b53afb889 17
emilmont 6:350b53afb889 18 /*! Wait until a Semaphore resource becomes available.
emilmont 6:350b53afb889 19 \param millisec timeout value or 0 in case of no time-out. (default: osWaitForever).
emilmont 6:350b53afb889 20 \return number of available tokens, or -1 in case of incorrect parameters
emilmont 6:350b53afb889 21 */
emilmont 6:350b53afb889 22 int32_t wait(uint32_t millisec=osWaitForever);
emilmont 6:350b53afb889 23
emilmont 6:350b53afb889 24 /*! Release a Semaphore resource that was obtain with Semaphore::wait.
emilmont 6:350b53afb889 25 \return status code that indicates the execution status of the function.
emilmont 6:350b53afb889 26 */
emilmont 6:350b53afb889 27 osStatus release(void);
emilmont 6:350b53afb889 28
emilmont 6:350b53afb889 29 ~Semaphore();
emilmont 6:350b53afb889 30
emilmont 6:350b53afb889 31 private:
emilmont 6:350b53afb889 32 osSemaphoreId _osSemaphoreId;
emilmont 6:350b53afb889 33 osSemaphoreDef_t _osSemaphoreDef;
emilmont 6:350b53afb889 34 #ifdef CMSIS_OS_RTX
emilmont 6:350b53afb889 35 uint32_t _semaphore_data[2];
emilmont 6:350b53afb889 36 #endif
emilmont 6:350b53afb889 37 };
emilmont 6:350b53afb889 38
emilmont 6:350b53afb889 39 }
emilmont 6:350b53afb889 40 #endif