1/* pthread_barrier_init. Generic version.
2 Copyright (C) 2002-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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 <pthread.h>
20#include <string.h>
21#include <assert.h>
22
23#include <pt-internal.h>
24
25int
26pthread_barrier_init (pthread_barrier_t *barrier,
27 const pthread_barrierattr_t *attr, unsigned count)
28{
29 ASSERT_TYPE_SIZE (pthread_barrier_t, __SIZEOF_PTHREAD_BARRIER_T);
30
31 if (count == 0)
32 return EINVAL;
33
34 memset (barrier, 0, sizeof *barrier);
35
36 barrier->__lock = PTHREAD_SPINLOCK_INITIALIZER;
37 barrier->__pending = count;
38 barrier->__count = count;
39
40 if (attr == NULL
41 || memcmp (attr, &__pthread_default_barrierattr, sizeof (*attr)) == 0)
42 /* Use the default attributes. */
43 return 0;
44
45 /* Non-default attributes. */
46
47 barrier->__attr = malloc (sizeof *attr);
48 if (barrier->__attr == NULL)
49 return ENOMEM;
50
51 *barrier->__attr = *attr;
52 return 0;
53}
54

source code of glibc/sysdeps/htl/pt-barrier-init.c