blob: 3a3cd202c9e1d9bafe62f6ea945ab77053a687c6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
/* Implementation of the BSD usleep function using nanosleep.
Copyright (C) 1996-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <time.h>
#include <unistd.h>
int
usleep (useconds_t useconds)
{
struct timespec ts = { .tv_sec = (long int) (useconds / 1000000),
.tv_nsec = (long int) (useconds % 1000000) * 1000ul };
/* Note the usleep() is a cancellation point. But since we call
nanosleep() which itself is a cancellation point we do not have
to do anything here. */
return __nanosleep (&ts, NULL);
}
|
