/* Change priority protocol setting in pthread_mutexattr_t.

   Copyright (C) 2006-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.

   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>

int

pthread_mutexattr_setprotocol (pthread_mutexattr_t *attr, int protocol)

{

  if (protocol != PTHREAD_PRIO_NONE

      && protocol != PTHREAD_PRIO_INHERIT

      && __builtin_expect (protocol != PTHREAD_PRIO_PROTECT, 0))

    return EINVAL;

  struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;

  iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PROTOCOL_MASK)

		      | (protocol << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT));

  return 0;

}