hello world

neo/idlib/Timer.h

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+/*
+===========================================================================
+
+Doom 3 GPL Source Code
+Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 
+
+This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  
+
+Doom 3 Source Code is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Doom 3 Source Code is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.
+
+In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.
+
+If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
+
+===========================================================================
+*/
+
+#ifndef __TIMER_H__
+#define __TIMER_H__
+
+/*
+===============================================================================
+
+	Clock tick counter. Should only be used for profiling.
+
+===============================================================================
+*/
+
+class idTimer {
+public:
+					idTimer( void );
+					idTimer( double clockTicks );
+					~idTimer( void );
+
+	idTimer			operator+( const idTimer &t ) const;
+	idTimer			operator-( const idTimer &t ) const;
+	idTimer &		operator+=( const idTimer &t );
+	idTimer &		operator-=( const idTimer &t );
+
+	void			Start( void );
+	void			Stop( void );
+	void			Clear( void );
+	double			ClockTicks( void ) const;
+	double			Milliseconds( void ) const;
+
+private:
+	static double	base;
+	enum			{
+						TS_STARTED,
+						TS_STOPPED
+					} state;
+	double			start;
+	double			clockTicks;
+
+	void			InitBaseClockTicks( void ) const;
+};
+
+/*
+=================
+idTimer::idTimer
+=================
+*/
+ID_INLINE idTimer::idTimer( void ) {
+	state = TS_STOPPED;
+	clockTicks = 0.0;
+}
+
+/*
+=================
+idTimer::idTimer
+=================
+*/
+ID_INLINE idTimer::idTimer( double _clockTicks ) {
+	state = TS_STOPPED;
+	clockTicks = _clockTicks;
+}
+
+/*
+=================
+idTimer::~idTimer
+=================
+*/
+ID_INLINE idTimer::~idTimer( void ) {
+}
+
+/*
+=================
+idTimer::operator+
+=================
+*/
+ID_INLINE idTimer idTimer::operator+( const idTimer &t ) const {
+	assert( state == TS_STOPPED && t.state == TS_STOPPED );
+	return idTimer( clockTicks + t.clockTicks );
+}
+
+/*
+=================
+idTimer::operator-
+=================
+*/
+ID_INLINE idTimer idTimer::operator-( const idTimer &t ) const {
+	assert( state == TS_STOPPED && t.state == TS_STOPPED );
+	return idTimer( clockTicks - t.clockTicks );
+}
+
+/*
+=================
+idTimer::operator+=
+=================
+*/
+ID_INLINE idTimer &idTimer::operator+=( const idTimer &t ) {
+	assert( state == TS_STOPPED && t.state == TS_STOPPED );
+	clockTicks += t.clockTicks;
+	return *this;
+}
+
+/*
+=================
+idTimer::operator-=
+=================
+*/
+ID_INLINE idTimer &idTimer::operator-=( const idTimer &t ) {
+	assert( state == TS_STOPPED && t.state == TS_STOPPED );
+	clockTicks -= t.clockTicks;
+	return *this;
+}
+
+/*
+=================
+idTimer::Start
+=================
+*/
+ID_INLINE void idTimer::Start( void ) {
+	assert( state == TS_STOPPED );
+	state = TS_STARTED;
+	start = idLib::sys->GetClockTicks();
+}
+
+/*
+=================
+idTimer::Stop
+=================
+*/
+ID_INLINE void idTimer::Stop( void ) {
+	assert( state == TS_STARTED );
+	clockTicks += idLib::sys->GetClockTicks() - start;
+	if ( base < 0.0 ) {
+		InitBaseClockTicks();
+	}
+	if ( clockTicks > base ) {
+		clockTicks -= base;
+	}
+	state = TS_STOPPED;
+}
+
+/*
+=================
+idTimer::Clear
+=================
+*/
+ID_INLINE void idTimer::Clear( void ) {
+	clockTicks = 0.0;
+}
+
+/*
+=================
+idTimer::ClockTicks
+=================
+*/
+ID_INLINE double idTimer::ClockTicks( void ) const {
+	assert( state == TS_STOPPED );
+	return clockTicks;
+}
+
+/*
+=================
+idTimer::Milliseconds
+=================
+*/
+ID_INLINE double idTimer::Milliseconds( void ) const {
+	assert( state == TS_STOPPED );
+	return clockTicks / ( idLib::sys->ClockTicksPerSecond() * 0.001 );
+}
+
+
+/*
+===============================================================================
+
+	Report of multiple named timers.
+
+===============================================================================
+*/
+
+class idTimerReport {
+public:
+					idTimerReport( void );
+					~idTimerReport( void );
+
+	void			SetReportName( const char *name );
+	int				AddReport( const char *name );
+	void			Clear( void );
+	void			Reset( void );
+	void			PrintReport( void );
+	void			AddTime( const char *name, idTimer *time );
+
+private:
+	idList<idTimer*>timers;
+	idStrList		names;
+	idStr			reportName;
+};
+
+#endif /* !__TIMER_H__ */