blob: f1ecc4f98bb03ceb6e02dcf47a28a1215d8311aa (
plain) (
blame)
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
50
51
52
53
54
55
56
|
/* pause -- suspend the process until a signal arrives. POSIX.1 version.
Copyright (C) 2003-2016 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, see
<http://www.gnu.org/licenses/>. */
#include <signal.h>
#include <unistd.h>
#include <sysdep-cancel.h>
/* Suspend the process until a signal arrives.
This always returns -1 and sets errno to EINTR. */
int
__libc_pause (void)
{
sigset_t set;
__sigemptyset (&set);
__sigprocmask (SIG_BLOCK, NULL, &set);
/* pause is a cancellation point, but so is sigsuspend.
So no need for anything special here. */
return __sigsuspend (&set);
}
weak_alias (__libc_pause, pause)
LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */
#ifndef NO_CANCELLATION
# include <not-cancel.h>
int
__pause_nocancel (void)
{
sigset_t set;
__sigemptyset (&set);
__sigprocmask (SIG_BLOCK, NULL, &set);
return sigsuspend_not_cancel (&set);
}
#endif
|
