/* Examine and change blocked signals for a thread.  Generic POSIX version.

   Copyright (C) 2014-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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>

#if defined SIGCANCEL || defined SIGTIMER || defined SIGSETXID

# error "This implementation assumes no internal-only signal numbers."

#endif

int

pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)

{

  /* Here we assume that sigprocmask actually does everything right.

     The only difference is the return value protocol.  */

  int result = sigprocmask (how, newmask, oldmask);

  if (result < 0)

    result = errno;

  return result;

}