blob: 32fe839c014cb19f3d34025c9af22e322413ff51 (
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
34
35
36
37
38
39
40
41
|
/* vi: set sw=4 ts=4: */
/*
* pause() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <unistd.h>
#include <cancel.h>
#ifdef __NR_pause
/* even if it is not obvious, glibc uses the pause syscall, see syscalls.list */
# define __NR___pause_nocancel __NR_pause
static _syscall0(int, __NC(pause))
CANCELLABLE_SYSCALL(int, pause, (void), ())
#else
# define __need_NULL
# include <stddef.h>
# include <signal.h>
int
# ifdef __LINUXTHREADS_OLD__
weak_function
# endif
pause(void)
{
sigset_t set;
/*__sigemptyset (&set); - why? */
sigprocmask (SIG_BLOCK, NULL, &set);
/* pause is a cancellation point, but so is sigsuspend.
So no need for anything special here. */
return sigsuspend(&set);
}
lt_strong_alias(pause)
LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */
#endif
|
