libc/unistd/ualarm.c

   1 /*
   2  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   3  *
   4  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   5  */
   6
   7 #include <time.h>
   8 #include <sys/time.h>
   9 #include <sys/types.h>
  10 #include <unistd.h>
  11
  12
  13 useconds_t ualarm(useconds_t value, useconds_t interval)
  14 {
  15     struct itimerval otimer;
  16     const struct itimerval itimer = {
  17         { 0, interval },
  18         { 0, value}
  19     };
  20
  21     if (setitimer(ITIMER_REAL, &itimer, &otimer) < 0) {
  22         return -1;
  23     }
  24     return((otimer.it_value.tv_sec * 1000000) + otimer.it_value.tv_usec);
  25 }