src/compat/utime.c

   1 #ifndef HAVE_USLEEP
   2
   3 #ifdef HAVE_SELECT
   4
   5 #ifdef HAVE_SYS_SELECT_H
   6 # include <sys/select.h>
   7 #else
   8 # include <sys/time.h>
   9 # include <sys/types.h>
  10 # include <unistd.h>
  11 #endif
  12
  13 void usleep(long usec)
  14 {
  15         struct timeval tv;
  16
  17         tv.tv_sec = usec / 1000000;
  18         tv.tv_usec = usec % 1000000;
  19         select(0, NULL, NULL, NULL, &tv);
  20 }
  21
  22 #elif defined WIN32
  23
  24 /* usleep implementation from FreeSCI */
  25
  26 #include <windows.h>
  27
  28 void usleep (long usec)
  29 {
  30         LARGE_INTEGER lFrequency;
  31         LARGE_INTEGER lEndTime;
  32         LARGE_INTEGER lCurTime;
  33
  34         QueryPerformanceFrequency (&lFrequency);
  35         if (lFrequency.QuadPart) {
  36                 QueryPerformanceCounter (&lEndTime);
  37                 lEndTime.QuadPart += (LONGLONG) usec *
  38                                         lFrequency.QuadPart / 1000000;
  39                 do {
  40                         QueryPerformanceCounter (&lCurTime);
  41                         Sleep(0);
  42                 } while (lCurTime.QuadPart < lEndTime.QuadPart);
  43         }
  44 }
  45
  46 #endif
  47
  48 #endif /* !HAVE_USLEEP */