// ===========================================================================
//  (C) 1999 Vienna University of Technology
// ===========================================================================
//  NAME:       BenchTimer
//  TYPE:       c++ header
//  PROJECT:    Urban Viz/yare (yet another rendering engine)
//  CONTENT:    Very accurate timer for Win32 systems
//				(uses QueryPerformanceCounter, usually microseconds)
//  VERSION:    0.1
// ===========================================================================
//  AUTHORS:    mw      Michael Wimmer
// ===========================================================================
//  HISTORY:
//
//  15-jul-99 14:00:00  mw      created
// ===========================================================================
//  $Header: /usr/local/cvsyare/cvsyare/src/yareutils/BenchTimer.h,v 1.1 2002/09/24 16:53:56 wimmer Exp $ 
// ===========================================================================

#ifndef NO_PRAGMA_ONCE
#pragma once
#endif

#ifndef _BENCHTIMER_H
#define _BENCHTIMER_H

#ifdef WIN32

#if !(_MSC_VER >= 1200)
#define __forceinline inline 
#endif

// we definitely want timers to be inlined!
#define PERFTIMER_INLINE __forceinline


	#define WIN32_LEAN_AND_MEAN
	#define NOMINMAX
	#include <windows.h>	// for LARGE_INTEGER

	#define PERFTIMER BenchTimer
	
	#define TIMEVAL_T LARGE_INTEGER
	#define TIMEVAL_ZERO(__timval) (__timval).QuadPart = 0;
	#define TIMEVAL_GET(__timval) QueryPerformanceCounter(&__timval);
	#define TIMEVAL_TODOUBLE(__timval) 	((double)__timval.QuadPart / (double)frequency.QuadPart)
	#define TIMEVAL_ASSIGN(__timval1, __timval2) __timval1.QuadPart = __timval2.QuadPart;

	#define TIMEVAL_ADD(total, end, start) \
		if (end.QuadPart > start.QuadPart) \
			total.QuadPart += end.QuadPart - start.QuadPart; \
		else \
			total.QuadPart += MAXLONGLONG - end.QuadPart + start.QuadPart;
	
	#include "PerfTimerSkeleton.h"

#else
	#define DUMMY_TIMER
	#include "PerfTimerSkeleton.h"
	#undef DUMMY_TIMER
#endif

#undef PERFTIMER
#undef TIMEVAL_ZERO
//#undef TIMEVAL_GET
#undef TIMEVAL_TODOUBLE
#undef TIMEVAL_ASSIGN
//#undef TIMEVAL_ADD

#endif	// _BENCHTIMER_H