/* Copyright (C) 2002, 2003, 2004 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 <http://www.gnu.org/licenses/>. */ #include <errno.h> #include <signal.h> #include <pthreadP.h> #include <sysdep.h> int pthread_sigmask (how, newmask, oldmask) 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; } #ifdef INTERNAL_SYSCALL /* We know that realtime signals are available if NPTL is used. */ INTERNAL_SYSCALL_DECL (err); int result = INTERNAL_SYSCALL (rt_sigprocmask, err, 4, how, newmask, oldmask, _NSIG / 8); return (INTERNAL_SYSCALL_ERROR_P (result, err) ? INTERNAL_SYSCALL_ERRNO (result, err) : 0); #else return sigprocmask (how, newmask, oldmask) == -1 ? errno : 0; #endif }