git.rot13.org Git - librfid/blob - src/usleep.c

   1 #include <windows.h>
   2 #include <errno.h>
   3
   4 void usleep(unsigned long usec)
   5 {
   6     int msec;
   7
   8     msec=usec/1000;
   9     usec=usec%1000;
  10
  11     if(msec)
  12     {
  13         if(usec)
  14             msec++;
  15     }
  16     else
  17     {
  18         LARGE_INTEGER current,freq,end;
  19
  20         QueryPerformanceFrequency(&freq);
  21         QueryPerformanceCounter(&end);
  22
  23         end.QuadPart+=(freq.QuadPart*usec)/1000000;
  24         while(QueryPerformanceCounter(&current) && (current.QuadPart<=end.QuadPart))
  25         {
  26         }
  27     }
  28
  29     Sleep(msec);
  30 }