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- /* 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));
- }
-