aboutsummaryrefslogtreecommitdiff
path: root/nptl/pthread_rwlockattr_setkind_np.c
blob: 6ef82667b06b7c3344404890243d0bd018d11e8b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
/* Copyright (C) 2002-2015 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"


int
pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref)
{
  struct pthread_rwlockattr *iattr;

  if (pref != PTHREAD_RWLOCK_PREFER_READER_NP
      && pref != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
      && __builtin_expect  (pref != PTHREAD_RWLOCK_PREFER_WRITER_NP, 0))
    return EINVAL;

  iattr = (struct pthread_rwlockattr *) attr;

  iattr->lockkind = pref;

  return 0;
}