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/* ----------------------------------------------------------------------- *
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 * This file is part of GEL, http://www.imm.dtu.dk/GEL
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 * Copyright (C) the authors and DTU Informatics
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 * For license and list of authors, see ../../doc/intro.pdf
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 * ----------------------------------------------------------------------- */
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/**
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 * @file Timer.h
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 * @brief Wall clock timing.
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 */
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#ifndef __UTIL_OSTIMER_H__
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#define __UTIL_OSTIMER_H__
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// Created by bdl 5. april 2002
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// The purpose of this file is to make a timer function that is as
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// precise as posible on any given platform
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#if (_MSC_VER >= 1200)
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#pragma warning (disable: 4244)
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#endif
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#ifdef WIN32
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#include <windows.h>
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static LARGE_INTEGER	largeInteger;
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#else
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#include <sys/time.h>
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#endif
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namespace Util{
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	class Timer {
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#ifdef WIN32
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		double freq;
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		double start_count;
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#else
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		timeval start_time;
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#endif
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	public:
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		void start() {
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#ifdef WIN32
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			QueryPerformanceFrequency(&largeInteger);
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			freq = largeInteger.QuadPart;
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			QueryPerformanceCounter(&largeInteger);
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			start_count = largeInteger.QuadPart;
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#else
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			gettimeofday(&start_time,0);
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#endif
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		}
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		float get_secs() {
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#ifdef WIN32
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			QueryPerformanceCounter(&largeInteger);
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			double now_count = largeInteger.QuadPart;
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			return (float)((now_count-start_count)/freq);
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#else
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			timeval now;
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			gettimeofday(&now,0);
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			return (now.tv_sec-start_time.tv_sec) +
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				(now.tv_usec-start_time.tv_usec)/1.0e6;
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#endif
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		}
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	};
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}
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#endif