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/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <signal.h>
#include <pthreadP.h>
#include <sysdep.h>
int
pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
{
sigset_t local_newmask;
/* The only thing we have to make sure here is that SIGCANCEL and
SIGSETXID is not blocked. */
if (newmask != NULL
&& (__builtin_expect (__sigismember (newmask, SIGCANCEL), 0)
|| __builtin_expect (__sigismember (newmask, SIGSETXID), 0)))
{
local_newmask = *newmask;
__sigdelset (&local_newmask, SIGCANCEL);
__sigdelset (&local_newmask, SIGSETXID);
newmask = &local_newmask;
}
/* We know that realtime signals are available if NPTL is used. */
int result = INTERNAL_SYSCALL_CALL (rt_sigprocmask, how, newmask,
oldmask, _NSIG / 8);
return (INTERNAL_SYSCALL_ERROR_P (result)
? INTERNAL_SYSCALL_ERRNO (result)
: 0);
}
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