1/* Implementation of the BSD usleep function using nanosleep.
2 Copyright (C) 1996-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <time.h>
20#include <unistd.h>
21
22int
23usleep (useconds_t useconds)
24{
25 struct timespec ts = { .tv_sec = (long int) (useconds / 1000000),
26 .tv_nsec = (long int) (useconds % 1000000) * 1000ul };
27
28 /* Note the usleep() is a cancellation point. But since we call
29 nanosleep() which itself is a cancellation point we do not have
30 to do anything here. */
31 return __nanosleep (&ts, NULL);
32}
33