/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant 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 2 of the License, or
   (at your option) any later version.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "timer.h"
#include "globaldefs.h"


#if GDEF_OS_WINDOWS

#include <windows.h>

MillisecondTime MillisecondTime::current(){
	static class Cached
	{
	LONGLONG m_frequency;
	LONGLONG m_base;
public:
	Cached(){
		QueryPerformanceFrequency( (LARGE_INTEGER *) &m_frequency );
		QueryPerformanceCounter( (LARGE_INTEGER *) &m_base );
	}
	LONGLONG frequency(){
		return m_frequency;
	}
	LONGLONG base(){
		return m_base;
	}
	} cached;

	if ( cached.frequency() > 0 ) {
		LONGLONG count;
		QueryPerformanceCounter( (LARGE_INTEGER *) &count );
		return time_from_ticks( count - cached.base(), cached.frequency() );
	}
	else
	{
#if 1
		return MillisecondTime();
#else
		return time_from_ticks( timeGetTime(), 1000 );
#endif
	}
}




#elif GDEF_OS_POSIX

#include <time.h>
#include "sys/time.h"

MillisecondTime MillisecondTime::current(){
	static class Cached
	{
	time_t m_base;
public:
	Cached(){
		time( &m_base );
	}
	time_t base(){
		return m_base;
	}
	} cached;

	timeval time;
	gettimeofday( &time, 0 );
	return MillisecondTime( ( time.tv_sec - cached.base() ) * 1000 + time.tv_usec / 1000 );
}



#else

#include <ctime>

MillisecondTime MillisecondTime::current(){
	return time_from_ticks<std::clock_t>( std::clock(), CLOCKS_PER_SEC );
}



#endif
