forked from bartvdbraak/blender
93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/**
|
|
* $Id$
|
|
*
|
|
* ***** BEGIN GPL LICENSE BLOCK *****
|
|
*
|
|
* This program 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.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
|
|
* All rights reserved.
|
|
*
|
|
* The Original Code is: all of this file.
|
|
*
|
|
* Contributor(s): none yet.
|
|
*
|
|
* ***** END GPL LICENSE BLOCK *****
|
|
* Timing routine taken and modified from KX_BlenderSystem.cpp
|
|
*/
|
|
|
|
#include <windows.h>
|
|
#include "GPW_System.h"
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
GPW_System::GPW_System(void)
|
|
{
|
|
m_freq = 0;
|
|
m_lastCount = 0;
|
|
m_lastRest = 0;
|
|
m_lastTime = 0;
|
|
}
|
|
|
|
|
|
double GPW_System::GetTimeInSeconds()
|
|
{
|
|
#if 0
|
|
double secs = ::GetTickCount();
|
|
secs /= 1000.;
|
|
return secs;
|
|
#else
|
|
|
|
// 03/20/1999 Thomas Hieber: completely redone to get true Millisecond
|
|
// accuracy instead of very rough ticks. This routine will also provide
|
|
// correct wrap around at the end of "long"
|
|
|
|
// m_freq was set to -1, if the current Hardware does not support
|
|
// high resolution timers. We will use GetTickCount instead then.
|
|
if (m_freq < 0) {
|
|
return ::GetTickCount();
|
|
}
|
|
|
|
// m_freq is 0, the first time this function is being called.
|
|
if (m_freq == 0) {
|
|
// Try to determine the frequency of the high resulution timer
|
|
if (!::QueryPerformanceFrequency((LARGE_INTEGER*)&m_freq)) {
|
|
// There is no such timer....
|
|
m_freq = -1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Retrieve current count
|
|
__int64 count = 0;
|
|
::QueryPerformanceCounter((LARGE_INTEGER*)&count);
|
|
|
|
// Calculate the time passed since last call, and add the rest of
|
|
// those tics that didn't make it into the last reported time.
|
|
__int64 delta = 1000*(count-m_lastCount) + m_lastRest;
|
|
|
|
m_lastTime += (long)(delta/m_freq); // Save the new value
|
|
m_lastRest = delta%m_freq; // Save those ticks not being counted
|
|
m_lastCount = count; // Save last count
|
|
|
|
// Return a high quality measurement of time
|
|
return m_lastTime/1000.0;
|
|
#endif
|
|
}
|
|
|
|
|