win32_timer_impl.cpp

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/***************************************************************************
 *   Copyright (C) 2008 by Kutumov Alexey                                  *
 *   ru.pixel@gmail.com                                                    *
 *                                                                         *
 *   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.,                                       *
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 ***************************************************************************/

#include "gpucalc/win32_timer_impl.h"

//#define WIN32_LEAN_AND_MEAN
#include <windows.h>

namespace gpucalc
{


 template<> Timer * Singleton<Timer>::mSingleton = 0;


 Timer * Timer::getSingletonPtr()
 {
  return mSingleton;
 }


 Timer & Timer::getSingleton()
 {
  assert(mSingleton);
  return(* mSingleton);
 }
 
 
 Timer::Timer(): Singleton<Timer>(_Win32TimerName)
 {
  LARGE_INTEGER start;
  LARGE_INTEGER freq;
  QueryPerformanceCounter(&start); //�������� ��������� �������� ��� ������ �������.
  QueryPerformanceFrequency(&freq); //��������� ������� �������� ����������.
  mStartTime = start.QuadPart;
  mFrequency = freq.QuadPart;
  GetProcessAffinityMask(GetCurrentProcess(), &mProcAffinity, &mSysAffinity);
  mThread = GetCurrentThread();
 }


 Timer::~Timer()
 {
 }


 double Timer::getTime()
 {
  return static_cast<double>(getCounter()) / static_cast<double>(mFrequency);
 }

 __int64 Timer::getCounter()
 {
  SetProcessAffinityMask(mThread, 1);
  LARGE_INTEGER c;
  QueryPerformanceCounter(&c); //gets current timestamp value
  SetProcessAffinityMask(mThread, mProcAffinity);
  return c.QuadPart;
 }
}