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b168057a | 1 | /* Copyright (C) 1997-2015 Free Software Foundation, Inc. |
cbdee279 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 | |
41bdb6e2 AJ |
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. | |
cbdee279 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
cbdee279 | 13 | |
41bdb6e2 | 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/>. */ | |
cbdee279 | 17 | |
0dee6738 | 18 | #include <errno.h> |
cbdee279 | 19 | #include <signal.h> |
6080ecdf | 20 | #include <string.h> |
cbdee279 | 21 | |
08192659 | 22 | #include <nptl/pthreadP.h> |
6ee8d334 | 23 | #include <sysdep-cancel.h> |
0dee6738 UD |
24 | #include <sys/syscall.h> |
25 | ||
655b26bb | 26 | #ifdef __NR_rt_sigtimedwait |
cbdee279 | 27 | |
bc58c14e UD |
28 | static int |
29 | do_sigtimedwait (const sigset_t *set, siginfo_t *info, | |
30 | const struct timespec *timeout) | |
31 | { | |
aa3cee21 UD |
32 | #ifdef SIGCANCEL |
33 | sigset_t tmpset; | |
53b4fed6 UD |
34 | if (set != NULL |
35 | && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) | |
36 | # ifdef SIGSETXID | |
37 | || __builtin_expect (__sigismember (set, SIGSETXID), 0) | |
38 | # endif | |
39 | )) | |
aa3cee21 UD |
40 | { |
41 | /* Create a temporary mask without the bit for SIGCANCEL set. */ | |
42 | // We are not copying more than we have to. | |
43 | memcpy (&tmpset, set, _NSIG / 8); | |
44 | __sigdelset (&tmpset, SIGCANCEL); | |
53b4fed6 UD |
45 | # ifdef SIGSETXID |
46 | __sigdelset (&tmpset, SIGSETXID); | |
47 | # endif | |
aa3cee21 UD |
48 | set = &tmpset; |
49 | } | |
50 | #endif | |
51 | ||
bc58c14e UD |
52 | /* XXX The size argument hopefully will have to be changed to the |
53 | real size of the user-level sigset_t. */ | |
32a45bea | 54 | int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set, |
f3aae3f3 | 55 | info, timeout, _NSIG / 8); |
bc58c14e UD |
56 | |
57 | /* The kernel generates a SI_TKILL code in si_code in case tkill is | |
58 | used. tkill is transparently used in raise(). Since having | |
59 | SI_TKILL as a code is useful in general we fold the results | |
60 | here. */ | |
61 | if (result != -1 && info != NULL && info->si_code == SI_TKILL) | |
62 | info->si_code = SI_USER; | |
63 | ||
64 | return result; | |
65 | } | |
66 | ||
67 | ||
cbdee279 UD |
68 | /* Return any pending signal or wait for one for the given time. */ |
69 | int | |
14bb4e57 AZ |
70 | __sigtimedwait (const sigset_t *set, siginfo_t *info, |
71 | const struct timespec *timeout) | |
cbdee279 | 72 | { |
6ee8d334 | 73 | if (SINGLE_THREAD_P) |
bc58c14e | 74 | return do_sigtimedwait (set, info, timeout); |
6ee8d334 UD |
75 | |
76 | int oldtype = LIBC_CANCEL_ASYNC (); | |
77 | ||
cbdee279 UD |
78 | /* XXX The size argument hopefully will have to be changed to the |
79 | real size of the user-level sigset_t. */ | |
bc58c14e | 80 | int result = do_sigtimedwait (set, info, timeout); |
6ee8d334 UD |
81 | |
82 | LIBC_CANCEL_RESET (oldtype); | |
83 | ||
84 | return result; | |
cbdee279 | 85 | } |
6166815d | 86 | libc_hidden_def (__sigtimedwait) |
cbdee279 | 87 | weak_alias (__sigtimedwait, sigtimedwait) |
655b26bb | 88 | #else |
2826ac7e | 89 | # include <signal/sigtimedwait.c> |
655b26bb | 90 | #endif |