1/* Copyright (C) 2002-2021 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 <string.h>
20#include <pthreadP.h>
21
22
23int
24__pthread_mutexattr_init (pthread_mutexattr_t *attr)
25{
26 ASSERT_TYPE_SIZE (pthread_mutexattr_t, __SIZEOF_PTHREAD_MUTEXATTR_T);
27 ASSERT_PTHREAD_INTERNAL_SIZE (pthread_mutexattr_t,
28 struct pthread_mutexattr);
29
30 if (sizeof (struct pthread_mutexattr) != sizeof (pthread_mutexattr_t))
31 memset (attr, '\0', sizeof (*attr));
32
33 /* We use bit 31 to signal whether the mutex is going to be
34 process-shared or not. By default it is zero, i.e., the mutex is
35 not process-shared. */
36 ((struct pthread_mutexattr *) attr)->mutexkind = PTHREAD_MUTEX_NORMAL;
37
38 return 0;
39}
40weak_alias (__pthread_mutexattr_init, pthread_mutexattr_init)
41hidden_def (__pthread_mutexattr_init)
42