1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/unix/bsd/ualarm.c b/sysdeps/unix/bsd/ualarm.c
new file mode 100644
index 0000000000..8d8e01d475
--- /dev/null
+++ b/sysdeps/unix/bsd/ualarm.c
@@ -0,0 +1,42 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <sys/time.h>
+
+/* Set an alarm to go off (generating a SIGALRM signal) in VALUE microseconds.
+   If INTERVAL is nonzero, when the alarm goes off, the timer is reset to go
+   off every INTERVAL microseconds thereafter.
+
+   Returns the number of microseconds remaining before the alarm.  */
+unsigned int
+DEFUN(ualarm, (value, interval),
+      unsigned int value AND unsigned int interval)
+{
+  struct itimerval timer, otimer;
+
+  timer.it_value.tv_sec = 0;
+  timer.it_value.tv_usec = value;
+  timer.it_interval.tv_sec = 0;
+  timer.it_interval.tv_usec = interval;
+
+  if (setitimer(ITIMER_REAL, &timer, &otimer) < 0)
+    return -1;
+
+  return (otimer.it_value.tv_sec * 1000) + otimer.it_value.tv_usec;
+}