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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* vi: set sw=4 ts=4: */
/* sigwait
*
* Copyright (C) 2006 by Steven J. Hill <sjhill@realitydiluted.com>
* Copyright (C) 2003-2005 by Erik Andersen <andersen@uclibc.org>
*
* This program 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 <errno.h>
#include <signal.h>
#include <string.h>
libc_hidden_proto(sigwaitinfo)
#ifdef __UCLIBC_HAS_THREADS_NATIVE__
# include <sysdep-cancel.h>
# ifdef __NR_rt_sigtimedwait
/* Return any pending signal or wait for one for the given time. */
static int do_sigwait(const sigset_t *set, int *sig)
{
int ret;
# ifdef SIGCANCEL
sigset_t tmpset;
if (set != NULL
&& (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
# ifdef SIGSETXID
|| __builtin_expect (__sigismember (set, SIGSETXID), 0)
# endif
))
{
/* Create a temporary mask without the bit for SIGCANCEL set. */
// We are not copying more than we have to.
memcpy(&tmpset, set, _NSIG / 8);
__sigdelset(&tmpset, SIGCANCEL);
# ifdef SIGSETXID
__sigdelset(&tmpset, SIGSETXID);
# endif
set = &tmpset;
}
# endif
/* XXX The size argument hopefully will have to be changed to the
real size of the user-level sigset_t. */
# ifdef INTERNAL_SYSCALL
INTERNAL_SYSCALL_DECL(err);
do
ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, set, NULL,
NULL, _NSIG / 8);
while (INTERNAL_SYSCALL_ERROR_P (ret, err)
&& INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR);
if (! INTERNAL_SYSCALL_ERROR_P (ret, err))
{
*sig = ret;
ret = 0;
}
else
ret = INTERNAL_SYSCALL_ERRNO (ret, err);
# else
# error INTERNAL_SYSCALL must be defined!!!
# endif
return ret;
}
int __sigwait (const sigset_t *set, int *sig) attribute_hidden;
int __sigwait (const sigset_t *set, int *sig)
{
if(SINGLE_THREAD_P)
return do_sigwait(set, sig);
int oldtype = LIBC_CANCEL_ASYNC();
int result = do_sigwait(set, sig);
LIBC_CANCEL_RESET(oldtype);
return result;
}
# else
# error We must have rt_sigtimedwait defined!!!
# endif
#else
# undef sigwait
int __sigwait (const sigset_t *set, int *sig) attribute_hidden;
int __sigwait (const sigset_t *set, int *sig)
{
int ret = 1;
if ((ret = sigwaitinfo(set, NULL)) != -1) {
*sig = ret;
return 0;
}
return 1;
}
#endif
libc_hidden_proto(sigwait)
weak_alias(__sigwait,sigwait)
libc_hidden_def(sigwait)
|
