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// Copyright (c) 2013, Regents of the University of Pennsylvania                    //
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#ifndef _TIMER_WRAPPER_H_
#define _TIMER_WRAPPER_H_

// TODO: change to a more accurate timer lib instead of standard C lib
#include <time.h>
#include <iostream>

#include "headers\global_headers.h"

class TimerWrapper
{
public:
	inline TimerWrapper() {m_sec_per_clock = 1.0/(ScalarType)CLOCKS_PER_SEC;}
	inline virtual ~TimerWrapper() {}

	inline void Tic() {m_start = clock();m_pause_time=0;}
	inline void Toc() {m_end = clock();}
	inline void Pause() {m_pause_start=clock();}
	inline void PauseAndReport(const char* msg) 
	{ 
		m_pause_start = clock(); 
		ScalarType d = (m_pause_start - m_start - m_pause_time)*m_sec_per_clock;
		std::cout << msg << ", time elapse: " << d << " seconds" << std::endl;
	}
	inline void Resume() { m_pause_time += (clock() - m_pause_start); }
	inline ScalarType Duration() {return (m_end-m_start-m_pause_time)*m_sec_per_clock;}
	inline void Report(const char* msg, bool verbose = true) 
	{
		if (verbose)
		{
			ScalarType d = Duration();
			std::cout << msg << ", time elapse: " << d << " seconds" << std::endl;
		}
	}
	inline void TocAndReport(const char* msg, bool verbose = true) {Toc(); Report(msg, verbose);}

protected:
	clock_t m_start;
	clock_t m_end;
	clock_t m_pause_start;
	clock_t m_pause_time;
	ScalarType m_sec_per_clock;
};

#endif