]>
Commit | Line | Data |
---|---|---|
f7a9f785 | 1 | /* Copyright (C) 1997-2016 Free Software Foundation, Inc. |
76e34a5d UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
76e34a5d UD |
17 | |
18 | #include <errno.h> | |
19 | #include <signal.h> | |
20 | #define __need_NULL | |
21 | #include <stddef.h> | |
6080ecdf | 22 | #include <string.h> |
76e34a5d | 23 | |
08192659 | 24 | #include <nptl/pthreadP.h> |
6ee8d334 | 25 | #include <sysdep-cancel.h> |
76e34a5d | 26 | #include <sys/syscall.h> |
76e34a5d UD |
27 | |
28 | #ifdef __NR_rt_sigtimedwait | |
76e34a5d UD |
29 | |
30 | /* Return any pending signal or wait for one for the given time. */ | |
6ee8d334 UD |
31 | static int |
32 | do_sigwait (const sigset_t *set, int *sig) | |
76e34a5d | 33 | { |
76e34a5d UD |
34 | int ret; |
35 | ||
aa3cee21 UD |
36 | #ifdef SIGCANCEL |
37 | sigset_t tmpset; | |
53b4fed6 UD |
38 | if (set != NULL |
39 | && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) | |
40 | # ifdef SIGSETXID | |
41 | || __builtin_expect (__sigismember (set, SIGSETXID), 0) | |
42 | # endif | |
43 | )) | |
aa3cee21 UD |
44 | { |
45 | /* Create a temporary mask without the bit for SIGCANCEL set. */ | |
46 | // We are not copying more than we have to. | |
47 | memcpy (&tmpset, set, _NSIG / 8); | |
48 | __sigdelset (&tmpset, SIGCANCEL); | |
53b4fed6 UD |
49 | # ifdef SIGSETXID |
50 | __sigdelset (&tmpset, SIGSETXID); | |
51 | # endif | |
aa3cee21 UD |
52 | set = &tmpset; |
53 | } | |
54 | #endif | |
55 | ||
76e34a5d UD |
56 | /* XXX The size argument hopefully will have to be changed to the |
57 | real size of the user-level sigset_t. */ | |
f4447671 | 58 | #ifdef INTERNAL_SYSCALL |
6aca81bb | 59 | INTERNAL_SYSCALL_DECL (err); |
4978fb0c | 60 | do |
32a45bea | 61 | ret = INTERNAL_SYSCALL (rt_sigtimedwait, err, 4, set, |
4978fb0c UD |
62 | NULL, NULL, _NSIG / 8); |
63 | while (INTERNAL_SYSCALL_ERROR_P (ret, err) | |
64 | && INTERNAL_SYSCALL_ERRNO (ret, err) == EINTR); | |
6aca81bb | 65 | if (! INTERNAL_SYSCALL_ERROR_P (ret, err)) |
f4447671 UD |
66 | { |
67 | *sig = ret; | |
68 | ret = 0; | |
69 | } | |
70 | else | |
6aca81bb | 71 | ret = INTERNAL_SYSCALL_ERRNO (ret, err); |
f4447671 | 72 | #else |
4978fb0c | 73 | do |
32a45bea | 74 | ret = INLINE_SYSCALL (rt_sigtimedwait, 4, set, NULL, NULL, _NSIG / 8); |
4978fb0c | 75 | while (ret == -1 && errno == EINTR); |
8a815198 UD |
76 | if (ret != -1) |
77 | { | |
78 | *sig = ret; | |
79 | ret = 0; | |
80 | } | |
81 | else | |
82 | ret = errno; | |
f4447671 | 83 | #endif |
76e34a5d UD |
84 | |
85 | return ret; | |
86 | } | |
6ee8d334 UD |
87 | |
88 | int | |
14bb4e57 | 89 | __sigwait (const sigset_t *set, int *sig) |
6ee8d334 UD |
90 | { |
91 | if (SINGLE_THREAD_P) | |
92 | return do_sigwait (set, sig); | |
93 | ||
94 | int oldtype = LIBC_CANCEL_ASYNC (); | |
95 | ||
96 | int result = do_sigwait (set, sig); | |
97 | ||
98 | LIBC_CANCEL_RESET (oldtype); | |
99 | ||
100 | return result; | |
101 | } | |
6166815d | 102 | libc_hidden_def (__sigwait) |
76e34a5d UD |
103 | weak_alias (__sigwait, sigwait) |
104 | #else | |
105 | # include <sysdeps/posix/sigwait.c> | |
106 | #endif | |
e5e45b53 | 107 | strong_alias (__sigwait, __libc_sigwait) |