xref: /freebsd/lib/libc/gen/usleep.c (revision 7d233b2220cd3d23c028bdac7eb3b6b7b2025125)
1*7d233b22SKonstantin Belousov /*-
2*7d233b22SKonstantin Belousov  * SPDX-License-Identifier: BSD-3-Clause
3*7d233b22SKonstantin Belousov  *
4*7d233b22SKonstantin Belousov  * Copyright (c) 1989, 1993
5*7d233b22SKonstantin Belousov  *	The Regents of the University of California.  All rights reserved.
6*7d233b22SKonstantin Belousov  *
7*7d233b22SKonstantin Belousov  * Redistribution and use in source and binary forms, with or without
8*7d233b22SKonstantin Belousov  * modification, are permitted provided that the following conditions
9*7d233b22SKonstantin Belousov  * are met:
10*7d233b22SKonstantin Belousov  * 1. Redistributions of source code must retain the above copyright
11*7d233b22SKonstantin Belousov  *    notice, this list of conditions and the following disclaimer.
12*7d233b22SKonstantin Belousov  * 2. Redistributions in binary form must reproduce the above copyright
13*7d233b22SKonstantin Belousov  *    notice, this list of conditions and the following disclaimer in the
14*7d233b22SKonstantin Belousov  *    documentation and/or other materials provided with the distribution.
15*7d233b22SKonstantin Belousov  * 3. Neither the name of the University nor the names of its contributors
16*7d233b22SKonstantin Belousov  *    may be used to endorse or promote products derived from this software
17*7d233b22SKonstantin Belousov  *    without specific prior written permission.
18*7d233b22SKonstantin Belousov  *
19*7d233b22SKonstantin Belousov  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20*7d233b22SKonstantin Belousov  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21*7d233b22SKonstantin Belousov  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22*7d233b22SKonstantin Belousov  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23*7d233b22SKonstantin Belousov  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24*7d233b22SKonstantin Belousov  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25*7d233b22SKonstantin Belousov  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26*7d233b22SKonstantin Belousov  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27*7d233b22SKonstantin Belousov  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28*7d233b22SKonstantin Belousov  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29*7d233b22SKonstantin Belousov  * SUCH DAMAGE.
30*7d233b22SKonstantin Belousov  */
31*7d233b22SKonstantin Belousov 
32*7d233b22SKonstantin Belousov #include "namespace.h"
33*7d233b22SKonstantin Belousov #include <time.h>
34*7d233b22SKonstantin Belousov #include <unistd.h>
35*7d233b22SKonstantin Belousov #include "un-namespace.h"
36*7d233b22SKonstantin Belousov 
37*7d233b22SKonstantin Belousov #include "libc_private.h"
38*7d233b22SKonstantin Belousov 
39*7d233b22SKonstantin Belousov int __usleep(useconds_t);
40*7d233b22SKonstantin Belousov 
41*7d233b22SKonstantin Belousov int
42*7d233b22SKonstantin Belousov __usleep(useconds_t useconds)
43*7d233b22SKonstantin Belousov {
44*7d233b22SKonstantin Belousov 	struct timespec time_to_sleep;
45*7d233b22SKonstantin Belousov 
46*7d233b22SKonstantin Belousov 	time_to_sleep.tv_nsec = (useconds % 1000000) * 1000;
47*7d233b22SKonstantin Belousov 	time_to_sleep.tv_sec = useconds / 1000000;
48*7d233b22SKonstantin Belousov 	return (((int (*)(const struct timespec *, struct timespec *))
49*7d233b22SKonstantin Belousov 	    (*__libsys_interposing_slot(INTERPOS_nanosleep)))(&time_to_sleep,
50*7d233b22SKonstantin Belousov 	    NULL));
51*7d233b22SKonstantin Belousov }
52*7d233b22SKonstantin Belousov 
53*7d233b22SKonstantin Belousov __weak_reference(__usleep, usleep);
54*7d233b22SKonstantin Belousov __weak_reference(__usleep, _usleep);
55