WINGs/usleep.c

   1
   2
   3 #include "../src/config.h"
   4
   5
   6 #ifdef HAVE_SYS_TIME_H
   7 # include <sys/time.h>
   8 #endif
   9
  10 #ifdef HAVE_SYS_TYPES_H
  11 # include <sys/types.h>
  12 #endif
  13
  14
  15 #include <unistd.h>
  16 #include <string.h>
  17
  18 #if defined(HAVE_SELECT)
  19
  20 #ifdef HAVE_SYS_SELECT_H
  21 # include <sys/select.h>
  22 #endif
  23
  24 void
  25 wusleep(unsigned int microsecs)
  26 {
  27     struct timeval tv;
  28     fd_set rd, wr, ex;
  29     FD_ZERO(&rd);
  30     FD_ZERO(&wr);
  31     FD_ZERO(&ex);
  32     tv.tv_sec = microsecs / 1000000u;
  33     tv.tv_usec = microsecs % 1000000u;
  34     select(1, &rd, &wr, &ex, &tv);
  35 }
  36
  37 #else /* not HAVE_SELECT */
  38
  39 # ifdef HAVE_POLL
  40
  41 void
  42 wusleep(unsigned int microsecs)
  43 {
  44     poll((struct poll *) 0, (size_t) 0, microsecs/1000);
  45 }
  46
  47 # else /* ! HAVE_POLL */
  48
  49 oops!
  50
  51 # endif /* !HAVE_POLL */
  52 #endif /* !HAVE_SELECT */