1/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include "pthreadP.h"
21
22
23int
24pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref)
25{
26 struct pthread_rwlockattr *iattr;
27
28 if (pref != PTHREAD_RWLOCK_PREFER_READER_NP
29 && pref != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
30 && __builtin_expect (pref != PTHREAD_RWLOCK_PREFER_WRITER_NP, 0))
31 return EINVAL;
32
33 iattr = (struct pthread_rwlockattr *) attr;
34
35 iattr->lockkind = pref;
36
37 return 0;
38}
39