Clone of mbed rtos 2 for easy accessibility.
Fork of mbed-rtos by
rtos/Semaphore.h
- Committer:
- emilmont
- Date:
- 2012-11-23
- Revision:
- 6:350b53afb889
- Child:
- 8:88a1a9c26ae3
File content as of revision 6:350b53afb889:
/* Copyright (c) 2012 mbed.org */ #ifndef SEMAPHORE_H #define SEMAPHORE_H #include <stdint.h> #include "cmsis_os.h" namespace rtos { /*! The Semaphore class is used to manage and protect access to a set of shared resources. */ class Semaphore { public: /*! Create and Initialize a Semaphore object used for managing resources. \param number of available resources; maximum index value is (count-1). */ Semaphore(int32_t count); /*! Wait until a Semaphore resource becomes available. \param millisec timeout value or 0 in case of no time-out. (default: osWaitForever). \return number of available tokens, or -1 in case of incorrect parameters */ int32_t wait(uint32_t millisec=osWaitForever); /*! Release a Semaphore resource that was obtain with Semaphore::wait. \return status code that indicates the execution status of the function. */ osStatus release(void); ~Semaphore(); private: osSemaphoreId _osSemaphoreId; osSemaphoreDef_t _osSemaphoreDef; #ifdef CMSIS_OS_RTX uint32_t _semaphore_data[2]; #endif }; } #endif