wintimer.cpp
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上传日期:2022-07-26
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- // wintimer.h
- //
- // Copyright (C) 2001, Chris Laurel <claurel@shatters.net>
- //
- // 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.
- #include <windows.h>
- #include "timer.h"
- class WindowsTimer : public Timer
- {
- public:
- WindowsTimer();
- ~WindowsTimer();
- double getTime() const;
- void reset();
- private:
- LARGE_INTEGER freq;
- LARGE_INTEGER start;
- };
- WindowsTimer::WindowsTimer()
- {
- QueryPerformanceFrequency(&freq);
- reset();
- }
- WindowsTimer::~WindowsTimer()
- {
- }
- double WindowsTimer::getTime() const
- {
- LARGE_INTEGER t;
- QueryPerformanceCounter(&t);
- return (double) (t.QuadPart - start.QuadPart) / (double) freq.QuadPart;
- }
- void WindowsTimer::reset()
- {
- QueryPerformanceCounter(&start);
- }
- Timer* CreateTimer()
- {
- return new WindowsTimer();
- }