sends analog data over TTN
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Diff: rtos/Semaphore.h
- Revision:
- 6:350b53afb889
- Child:
- 8:88a1a9c26ae3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rtos/Semaphore.h Fri Nov 23 09:57:31 2012 +0000 @@ -0,0 +1,40 @@ +/* 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