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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include "pthreadP.h"
#include <futex-internal.h>
#include <kernel-features.h>
#include <shlib-compat.h>
static const struct pthread_barrierattr default_barrierattr =
{
.pshared = PTHREAD_PROCESS_PRIVATE
};
int
___pthread_barrier_init (pthread_barrier_t *barrier,
const pthread_barrierattr_t *attr, unsigned int count)
{
ASSERT_TYPE_SIZE (pthread_barrier_t, __SIZEOF_PTHREAD_BARRIER_T);
ASSERT_PTHREAD_INTERNAL_SIZE (pthread_barrier_t,
struct pthread_barrier);
struct pthread_barrier *ibarrier;
/* XXX EINVAL is not specified by POSIX as a possible error code for COUNT
being too large. See pthread_barrier_wait for the reason for the
comparison with BARRIER_IN_THRESHOLD. */
if (__glibc_unlikely (count == 0 || count >= BARRIER_IN_THRESHOLD))
return EINVAL;
const struct pthread_barrierattr *iattr
= (attr != NULL
? (struct pthread_barrierattr *) attr
: &default_barrierattr);
ibarrier = (struct pthread_barrier *) barrier;
/* Initialize the individual fields. */
ibarrier->in = 0;
ibarrier->out = 0;
ibarrier->count = count;
ibarrier->current_round = 0;
ibarrier->shared = (iattr->pshared == PTHREAD_PROCESS_PRIVATE
? FUTEX_PRIVATE : FUTEX_SHARED);
return 0;
}
versioned_symbol (libc, ___pthread_barrier_init, pthread_barrier_init,
GLIBC_2_34);
libc_hidden_ver (___pthread_barrier_init, __pthread_barrier_init)
#ifndef SHARED
strong_alias (___pthread_barrier_init, __pthread_barrier_init)
#endif
#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
compat_symbol (libpthread, ___pthread_barrier_init, pthread_barrier_init,
GLIBC_2_2);
#endif
|
