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 #if defined(HAVE_SELECT)
  16
  17 #ifdef HAVE_SYS_SELECT_H
  18 # include <sys/select.h>
  19 #endif
  20
  21 void
  22 wusleep(unsigned int microsecs)
  23 {
  24     struct timeval tv;
  25     fd_set rd, wr, ex;
  26     FD_ZERO(&rd);
  27     FD_ZERO(&wr);
  28     FD_ZERO(&ex);
  29     tv.tv_sec = microsecs / 1000000u;
  30     tv.tv_usec = microsecs % 1000000u;
  31     select(1, &rd, &wr, &ex, &tv);
  32 }
  33
  34 #else /* not HAVE_SELECT */
  35
  36 # ifdef HAVE_POLL
  37
  38 void
  39 wusleep(unsigned int microsecs)
  40 {
  41     poll((struct poll *) 0, (size_t) 0, microsecs/1000);
  42 }
  43
  44 # else /* ! HAVE_POLL */
  45
  46 oops!
  47
  48 # endif /* !HAVE_POLL */
  49 #endif /* !HAVE_SELECT */