WINGs/usleep.c

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