1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/mach/usleep.c b/sysdeps/mach/usleep.c
new file mode 100644
index 0000000000..90d47d8c24
--- /dev/null
+++ b/sysdeps/mach/usleep.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 1992, 1993, 1994 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 <errno.h>
+#include <mach.h>
+#include <sys/time.h>
+
+/* Sleep USECONDS microseconds, or until a previously set timer goes off.  */
+unsigned int
+DEFUN(usleep, (useconds), unsigned int useconds)
+{
+  mach_port_t recv;
+  struct timeval before, after;
+
+  recv = __mach_reply_port ();
+
+  if (__gettimeofday (&before, NULL) < 0)
+    return useconds;
+  (void) __mach_msg (NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT,
+		     0, 0, recv, (useconds + 999) / 1000, MACH_PORT_NULL);
+  __mach_port_destroy (mach_task_self (), recv);
+  if (__gettimeofday (&after, NULL) < 0)
+    return 0;
+
+  return useconds - (((after.tv_sec - before.tv_sec) * 1000000) +
+		     (after.tv_usec - before.tv_usec));
+}