1 /* Copyright (C) 1992-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <errno.h>
19 #include <mach.h>
20 #include <sys/time.h>
21 #include <unistd.h>
22 #include <sysdep-cancel.h>
23
24 /* Sleep USECONDS microseconds, or until a previously set timer goes off. */
25 int
usleep(useconds_t useconds)26 usleep (useconds_t useconds)
27 {
28 mach_port_t recv;
29 int cancel_oldtype;
30 mach_msg_timeout_t timeout = useconds / 1000 + (useconds % 1000 != 0);
31
32 recv = __mach_reply_port ();
33
34 cancel_oldtype = LIBC_CANCEL_ASYNC();
35 (void) __mach_msg (NULL, MACH_RCV_MSG|MACH_RCV_TIMEOUT|MACH_RCV_INTERRUPT,
36 0, 0, recv, timeout, MACH_PORT_NULL);
37 LIBC_CANCEL_RESET (cancel_oldtype);
38 __mach_port_destroy (mach_task_self (), recv);
39
40 return 0;
41 }
42