1 | /* Copyright (C) 2002-2017 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
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 |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <signal.h> |
21 | #include <pthreadP.h> |
22 | #include <sysdep.h> |
23 | |
24 | |
25 | int |
26 | pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask) |
27 | { |
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 |
54 | } |
55 | |