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Query Performance Counter?

Started by fizbanx Feb 24, 2003 at 9:21 PM 1 replies 500+ views

Original Post

Feb 24, 2003 at 9:21 PM

Could someone please use this in context for me please? Not sure what a (LARGE_INTEGER *lpPerformanceCount) is. Wanting to convert over from getTickCount(). Thanks.

fizbanx

Feb 24, 2003 at 9:23 PM

er....GetTickCount() with capital ''G'' of course.

Yohumbus

Feb 24, 2003 at 9:52 PM

in context eh...

here it is from my timer function. It should be pretty straightforward.

  


class PrecisionTimer{
    LARGE_INTEGER mTime;
    LARGE_INTEGER mFrequincy;
    public:
    PrecisionTimer();
    
    ~PrecisionTimer();
    
    void Reset();
    
    double Get();
    

};


PrecisionTimer::PrecisionTimer() {
	if(!QueryPerformanceFrequency((LARGE_INTEGER *) &mFrequincy)) {
		mFrequincy.QuadPart = 0;
	} else {
		mFrequincy.QuadPart /= 1000;
	}
}

PrecisionTimer::~PrecisionTimer() {

}


void PrecisionTimer::Reset() {
	if(mFrequincy.QuadPart) {
		QueryPerformanceCounter((LARGE_INTEGER *) &mTime.QuadPart);
	} else {
		mTime.QuadPart = timeGetTime();
	}
}

double PrecisionTimer::Get() {
	LARGE_INTEGER	Temp;

	if(mFrequincy.QuadPart) {
		QueryPerformanceCounter((LARGE_INTEGER *) &Temp);
		return((double)(Temp.QuadPart - mTime.QuadPart)) / (double)mFrequincy.QuadPart;
	} else {
		return((double)(timeGetTime() - mTime.QuadPart));
	}
}

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