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d614a753 | 1 | /* Copyright (C) 2002-2020 Free Software Foundation, Inc. |
8badf496 | 2 | This file is part of the GNU C Library. |
e4b3707c | 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
8badf496 RM |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
8badf496 RM |
18 | |
19 | #include <errno.h> | |
20 | #include <signal.h> | |
7b052e33 | 21 | #include <pthreadP.h> |
e4b3707c | 22 | #include <sysdep.h> |
8badf496 RM |
23 | |
24 | ||
25 | int | |
26 | pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask) | |
27 | { | |
e4b3707c FW |
28 | sigset_t local_newmask; |
29 | ||
30 | /* The only thing we have to make sure here is that SIGCANCEL and | |
31 | SIGSETXID is not blocked. */ | |
32 | if (newmask != NULL | |
33 | && (__builtin_expect (__sigismember (newmask, SIGCANCEL), 0) | |
34 | || __builtin_expect (__sigismember (newmask, SIGSETXID), 0))) | |
35 | { | |
36 | local_newmask = *newmask; | |
37 | __sigdelset (&local_newmask, SIGCANCEL); | |
38 | __sigdelset (&local_newmask, SIGSETXID); | |
39 | newmask = &local_newmask; | |
40 | } | |
41 | ||
42 | #ifdef INTERNAL_SYSCALL | |
43 | /* We know that realtime signals are available if NPTL is used. */ | |
44 | INTERNAL_SYSCALL_DECL (err); | |
45 | int result = INTERNAL_SYSCALL (rt_sigprocmask, err, 4, how, newmask, | |
46 | oldmask, _NSIG / 8); | |
47 | ||
48 | return (INTERNAL_SYSCALL_ERROR_P (result, err) | |
49 | ? INTERNAL_SYSCALL_ERRNO (result, err) | |
50 | : 0); | |
51 | #else | |
52 | return sigprocmask (how, newmask, oldmask) == -1 ? errno : 0; | |
53 | #endif | |
8badf496 | 54 | } |