동구의 블로그

#include "Sleep.h"
#include <stdio.h>
 
 
void main()
{
	int i=0;
	if(InitSleep() == 0)
	{
		printf("Error\n");
		return;
	}
 
	printf("Start");
	USleep(1000000);
	printf("Stop");
}

#include "Sleep.h"
 
static LARGE_INTEGER freq;
static long ufreq;
static long mfreq;
 
int InitSleep()
{
	if (QueryPerformanceFrequency(&freq) == 0)
	{
		return 0;
	}
	ufreq = freq.QuadPart / 1000000;
	mfreq = freq.QuadPart / 1000;
 
	return 1;
}
 
void USleep(double us)
{
	LARGE_INTEGER startTime;
	LARGE_INTEGER nowTime;
	memset(&startTime,0,sizeof(LARGE_INTEGER));
	memset(&nowTime,0,sizeof(LARGE_INTEGER));
 
	QueryPerformanceCounter(&startTime);
 
	while (((nowTime.QuadPart - startTime.QuadPart) / ufreq) < us)
	{
		QueryPerformanceCounter(&nowTime);
	}
}
 
void MSleep(double ms)
{
	LARGE_INTEGER startTime;
	LARGE_INTEGER nowTime;
	memset(&startTime,0,sizeof(LARGE_INTEGER));
	memset(&nowTime,0,sizeof(LARGE_INTEGER));
 
	QueryPerformanceCounter(&startTime);
 
	while (((nowTime.QuadPart - startTime.QuadPart) / mfreq) < ms)
	{
		QueryPerformanceCounter(&nowTime);
	}
}

#include <Windows.h>
 
int InitSleep();
void USleep(double us);
void MSleep(double ms);