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 <errno.h>
20#include <pthreadP.h>
21#include <futex-internal.h>
22
23
24int
25pthread_mutexattr_setpshared (pthread_mutexattr_t *attr, int pshared)
26{
27 struct pthread_mutexattr *iattr;
28
29 int err = futex_supports_pshared (pshared);
30 if (err != 0)
31 return err;
32
33 iattr = (struct pthread_mutexattr *) attr;
34
35 if (pshared == PTHREAD_PROCESS_PRIVATE)
36 iattr->mutexkind &= ~PTHREAD_MUTEXATTR_FLAG_PSHARED;
37 else
38 iattr->mutexkind |= PTHREAD_MUTEXATTR_FLAG_PSHARED;
39
40 return 0;
41}
42