fsfw/osal/rtems/PollingTask.h

86 lines
2.9 KiB
C++

#ifndef POLLINGTASK_H_
#define POLLINGTASK_H_
#include "../../devicehandlers/FixedSlotSequence.h"
#include "../../tasks/FixedTimeslotTaskIF.h"
#include "TaskBase.h"
class PollingTask: public TaskBase, public FixedTimeslotTaskIF {
public:
/**
* @brief The standard constructor of the class.
*
* @details This is the general constructor of the class. In addition to the TaskBase parameters,
* the following variables are passed:
*
* @param (*setDeadlineMissedFunc)() The function pointer to the deadline missed function that shall be assigned.
*
* @param getPst The object id of the completely initialized polling sequence.
*/
PollingTask( const char *name, rtems_task_priority setPriority, size_t setStackSize, uint32_t overallPeriod, void (*setDeadlineMissedFunc)());
/**
* @brief The destructor of the class.
*
* @details The destructor frees all heap memory that was allocated on thread initialization for the PST and
* the device handlers. This is done by calling the PST's destructor.
*/
virtual ~PollingTask( void );
ReturnValue_t startTask( void );
/**
* This static function can be used as #deadlineMissedFunc.
* It counts missedDeadlines and prints the number of missed deadlines every 10th time.
*/
static void missedDeadlineCounter();
/**
* A helper variable to count missed deadlines.
*/
static uint32_t deadlineMissedCount;
ReturnValue_t addSlot(object_id_t componentId, uint32_t slotTimeMs, int8_t executionStep);
uint32_t getPeriodMs() const;
ReturnValue_t checkSequence() const;
ReturnValue_t sleepFor(uint32_t ms);
protected:
/**
* @brief id of the associated OS period
*/
rtems_id periodId;
FixedSlotSequence pst;
/**
* @brief This attribute holds a function pointer that is executed when a deadline was missed.
*
* @details Another function may be announced to determine the actions to perform when a deadline was missed.
* Currently, only one function for missing any deadline is allowed.
* If not used, it shall be declared NULL.
*/
void ( *deadlineMissedFunc )( void );
/**
* @brief This is the entry point in a new polling thread.
*
* @details This method, that is the generalOSAL::checkAndRestartPeriod( this->periodId, interval ); entry point in the new thread, is here set to generate
* and link the Polling Sequence Table to the thread object and start taskFunctionality()
* on success. If operation of the task is ended for some reason,
* the destructor is called to free allocated memory.
*/
static rtems_task taskEntryPoint( rtems_task_argument argument );
/**
* @brief This function holds the main functionality of the thread.
*
*
* @details Holding the main functionality of the task, this method is most important.
* It links the functionalities provided by FixedSlotSequence with the OS's System Calls
* to keep the timing of the periods.
*/
void taskFunctionality( void );
};
#endif /* POLLINGTASK_H_ */