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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* Implementation of the POSIX sleep function using nanosleep.
Copyright (C) 1996-1999, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <time.h>
/* The default implementation of sleep() in sysdeps/posix/sleep.c, based on
SIGALRM, does not mix well with threads. Therefore we use the nanosleep()
system call. */
unsigned int
__sleep (unsigned int seconds)
{
struct timespec ts = { tv_sec: seconds, tv_nsec: 0 };
int ret;
/* This is not necessary but some buggy programs depend on this. */
if (__builtin_expect (seconds == 0, 0))
{
#ifdef CANCELLATION_P
CANCELLATION_P (THREAD_SELF);
#endif
return 0;
}
ret = __nanosleep (&ts, &ts);
if (ret == 0)
return 0;
/* Round remaining time. */
return (unsigned int) ts.tv_sec + (ts.tv_nsec >= 500000000L);
}
weak_alias (__sleep, sleep)
|
