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#ifndef __INCLUDED_TIMER_H__
#define __INCLUDED_TIMER_H__

#include <sys/time.h>


/// a timer measures that intervals in seconds
/*! A timer class measures the time elapsed
* between the last two calls to its mark() function.
*/
class Timer {
public:
	/// Constructor
	Timer();
	/// Destructor
	~Timer();

	/// mark the current time as zero
	/*! Reset the timer, all subsequent calls too elapsed() will
	 * use now as a reference
	* that must be timed.
	*/
	void mark();

	/*! return the time elapsed since the last mark
	* @see mark()
	*/
	float elapsed();

	/// suspend calling process for a number of seconds
	void sleep(float seconds);

private:
	float 				timer_elapsed;
	struct timezone 		timer_tz;
	struct timeval 			timer_tick;
}; // class Timer


#endif // __INCLUDED_TIMER_H__