99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
/**
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* @file BinarySempahore.h
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*
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* @date 25.02.2020
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*/
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#ifndef FRAMEWORK_OSAL_FREERTOS_BINARYSEMPAHORE_H_
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#define FRAMEWORK_OSAL_FREERTOS_BINARYSEMPAHORE_H_
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#include <framework/returnvalues/HasReturnvaluesIF.h>
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#include <FreeRTOS.h>
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#include "semphr.h"
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/**
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* @brief OS Tool to achieve synchronization of between tasks or between task and ISR
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* @details
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* Documentation: https://www.freertos.org/Embedded-RTOS-Binary-Semaphores.html
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* @ingroup osal
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*/
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class BinarySemaphore: public HasReturnvaluesIF {
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public:
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static const uint8_t INTERFACE_ID = CLASS_ID::SEMAPHORE_IF;
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/** Semaphore object not found */
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static const ReturnValue_t SEMAPHORE_NOT_FOUND = MAKE_RETURN_CODE(1);
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/** Semaphore timeout */
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static const ReturnValue_t SEMAPHORE_TIMEOUT = MAKE_RETURN_CODE(2);
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/** The current semaphore can not be given, because it is not owned */
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static const ReturnValue_t SEMAPHORE_NOT_OWNED = MAKE_RETURN_CODE(3);
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/**
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* Create a binary semaphore
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*/
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BinarySemaphore();
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/**
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* Delete the binary semaphore to prevent a memory leak
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*/
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~BinarySemaphore();
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/**
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* Take the binary semaphore.
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* If the semaphore has already been taken, the task will be blocked for a maximum
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* of #timeoutMs or until the semaphore is given back,
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* for example by an ISR or another task.
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* @param timeoutMs
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* @return -@c RETURN_OK on success
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* -@c RETURN_FAILED on failure
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*/
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ReturnValue_t takeBinarySemaphore(uint32_t timeoutMs);
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/**
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* Same as lockBinarySemaphore() with timeout in FreeRTOS ticks.
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* @param timeoutTicks
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* @return -@c RETURN_OK on success
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* -@c RETURN_FAILED on failure
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*/
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ReturnValue_t takeBinarySemaphoreTickTimeout(TickType_t timeoutTicks);
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/**
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* Give back the binary semaphore
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* @return -@c RETURN_OK on success
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* -@c RETURN_FAILED on failure
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*/
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ReturnValue_t giveBinarySemaphore();
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/**
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* Get Handle to the semaphore.
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* @return
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*/
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SemaphoreHandle_t getSemaphore();
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/**
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* Wrapper function to give back semaphore from handle
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* @param semaphore
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* @return -@c RETURN_OK on success
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* -@c RETURN_FAILED on failure
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*/
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static ReturnValue_t giveBinarySemaphore(SemaphoreHandle_t semaphore);
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/**
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* Wrapper function to give back semaphore from handle when called from an ISR
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* @param semaphore
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* @param higherPriorityTaskWoken This will be set to pdPASS if a task with a higher priority
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* was unblocked
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* @return -@c RETURN_OK on success
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* -@c RETURN_FAILED on failure
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*/
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static ReturnValue_t giveBinarySemaphoreFromISR(SemaphoreHandle_t semaphore,
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BaseType_t * higherPriorityTaskWoken);
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private:
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SemaphoreHandle_t handle;
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};
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#endif /* FRAMEWORK_OSAL_FREERTOS_BINARYSEMPAHORE_H_ */
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