#include "timer.h"

LARGE_INTEGER timerLast;
LARGE_INTEGER timerThis;
LARGE_INTEGER timerFreq;
int timerReady = 0;

void TimerPrep(void)
{
	QueryPerformanceFrequency(&timerFreq);
	QueryPerformanceCounter(&timerThis);
	timerReady = 1;
}

LONGLONG TimerTick(void)
{
	if(timerReady == 0) {return 0;}
	// LAST = THIS so that THIS can be updated and the difference returned
	timerLast = timerThis;
	// Update THIS
	QueryPerformanceCounter(&timerThis);
	// Return the Difference
	return ((timerThis.QuadPart - timerLast.QuadPart) / timerFreq.QuadPart);
}

Quote:Original post by Daniel Miller
This doesn't answer your question, but I've heard that QueryPerformanceCounter/QueryPerformanceFrequency shouldn't be used anymore (the timer frequency changes mid-program). I could easily be wrong on this, so I'd wait for someone else to confirm it.

Quote:Original post by Conner McCloud

Quote:Original post by Daniel Miller
This doesn't answer your question, but I've heard that QueryPerformanceCounter/QueryPerformanceFrequency shouldn't be used anymore (the timer frequency changes mid-program). I could easily be wrong on this, so I'd wait for someone else to confirm it.

This is mostly an issue with laptops, I believe. The processors can actually slow themselves down in order to conserve energy, but Windows queries the frequency once at startup and just remembers the value.

To the OP: I am unaware of anything that would help. I believe VC++ can automagically print LONGLONG values using cout, but I don't recall for sure. If not, create a string just like any other integer type. [hint: cout << x%10; x /=10...there are gotcha's, but that's a start]

CM

#include <stdio.h>#include <stdlib.h>#include <windows.h>LARGE_INTEGER timerLast;LARGE_INTEGER timerThis;LARGE_INTEGER timerFreq;int timerReady = 0;/* * * */void TimerPrep(void){	QueryPerformanceFrequency(&timerFreq);	QueryPerformanceCounter(&timerThis);	timerReady = 1;}/* * * */float TimerTick(void){	if(timerReady == 0) {return 0;}	// LAST = THIS so that THIS can be updated and the difference returned	timerLast = timerThis;	// Update THIS	QueryPerformanceCounter(&timerThis);	// Return the Difference	return (((double)timerThis.QuadPart - (double)timerLast.QuadPart) / (double)timerFreq.QuadPart);}/* * * */int main(int argc, char *argv[]){  float laa;  TimerPrep();  system("PAUSE");  laa = TimerTick();  printf("Took %f\n", laa);  //printf("%d %d", sizeof(int), sizeof(double));  system("PAUSE");  return 0;}