1/* Implementation of the BSD usleep function using nanosleep.
2 Copyright (C) 1996-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <time.h>
21#include <unistd.h>
22
23int
24usleep (useconds_t useconds)
25{
26 struct timespec ts = { .tv_sec = (long int) (useconds / 1000000),
27 .tv_nsec = (long int) (useconds % 1000000) * 1000ul };
28
29 /* Note the usleep() is a cancellation point. But since we call
30 nanosleep() which itself is a cancellation point we do not have
31 to do anything here. */
32 return __nanosleep (&ts, NULL);
33}
34