4 void usleep(unsigned long usec)
18 LARGE_INTEGER current,freq,end;
20 QueryPerformanceFrequency(&freq);
21 QueryPerformanceCounter(&end);
23 end.QuadPart+=(freq.QuadPart*usec)/1000000;
24 while(QueryPerformanceCounter(¤t) && (current.QuadPart<=end.QuadPart))