about summary refs log tree commit diff
path: root/nptl/pthread_condattr_setpshared.c
blob: 408f8237edc530d9bdd0d34242a6ccafeda9e2e1 (plain) (blame)
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
/* Copyright (C) 2002-2016 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>
#include <futex-internal.h>

int
pthread_condattr_setpshared (pthread_condattr_t *attr, int pshared)
{
  int err = futex_supports_pshared (pshared);
  if (err != 0)
    return err;

  int *valuep = &((struct pthread_condattr *) attr)->value;

  *valuep = (*valuep & ~1) | (pshared != PTHREAD_PROCESS_PRIVATE);

  return 0;
}