RtTimer.h

/**********************************************************************/
/**********************************************************************/

#ifndef RTTIMER_H
#define RTTIMER_H

#include "RtError.h"
#include <string>

class RtTimer
{
public:

    static const int MIN_PERIOD = 1;
    static const int MAX_PERIOD = 5000;

    RtTimer();
        virtual ~RtTimer();


    typedef void (*RtTimerCallback)( double delta,
                                     double timeStamp,
                                     void *userData );


        void setCallback( RtTimerCallback callback, void *userData = 0 );


        void cancelCallback();


        void start(unsigned int period);


        void stop(void);


        double getTimestamp();

    // The RtTimerData structure is used to pass private class data to
    // the timer handling function or thread.
    struct RtTimerData {
        void *apiData;
        void *userCallback;
        void *userData;
        bool doInput;
        bool firstMessage;
        // Default constructor.
        RtTimerData() : apiData(0),
                        userCallback(0),
                        userData(0),
                        doInput(false),
                        firstMessage(true) {}
     };

    void *apiData_;
    std::string errorString_;

private:
    // A basic error reporting function for internal use.
    void error( RtError::Type type );

    RtTimerData inputData_;
};

#endif /* RTTIMER_H */

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