/* Copyright (C) 2002-2018 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 <pthreadP.h>

#include <futex-internal.h>

int

pthread_mutexattr_setpshared (pthread_mutexattr_t *attr, int pshared)

{

  struct pthread_mutexattr *iattr;

  int err = futex_supports_pshared (pshared);

  if (err != 0)

    return err;

  iattr = (struct pthread_mutexattr *) attr;

  if (pshared == PTHREAD_PROCESS_PRIVATE)

    iattr->mutexkind &= ~PTHREAD_MUTEXATTR_FLAG_PSHARED;

  else

    iattr->mutexkind |= PTHREAD_MUTEXATTR_FLAG_PSHARED;

  return 0;

}