1/* Copyright (C) 2002-2019 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
25int
26pthread_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