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688903eb | 1 | /* Copyright (C) 2002-2018 Free Software Foundation, Inc. |
76a50749 UD |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
76a50749 UD |
18 | |
19 | #include <errno.h> | |
20 | #include "pthreadP.h" | |
b02840ba | 21 | #include <futex-internal.h> |
d8ff3792 UD |
22 | #include <kernel-features.h> |
23 | ||
24 | ||
69854bb5 | 25 | static const struct pthread_barrierattr default_barrierattr = |
d8ff3792 UD |
26 | { |
27 | .pshared = PTHREAD_PROCESS_PRIVATE | |
28 | }; | |
76a50749 UD |
29 | |
30 | ||
31 | int | |
f63f2bfd JM |
32 | __pthread_barrier_init (pthread_barrier_t *barrier, |
33 | const pthread_barrierattr_t *attr, unsigned int count) | |
76a50749 | 34 | { |
72b3c6ee AZ |
35 | ASSERT_TYPE_SIZE (pthread_barrier_t, __SIZEOF_PTHREAD_BARRIER_T); |
36 | ASSERT_PTHREAD_INTERNAL_SIZE (pthread_barrier_t, | |
37 | struct pthread_barrier); | |
38 | ||
76a50749 UD |
39 | struct pthread_barrier *ibarrier; |
40 | ||
b02840ba TR |
41 | /* XXX EINVAL is not specified by POSIX as a possible error code for COUNT |
42 | being too large. See pthread_barrier_wait for the reason for the | |
43 | comparison with BARRIER_IN_THRESHOLD. */ | |
44 | if (__glibc_unlikely (count == 0 || count >= BARRIER_IN_THRESHOLD)) | |
76a50749 UD |
45 | return EINVAL; |
46 | ||
e51deae7 | 47 | const struct pthread_barrierattr *iattr |
d8ff3792 | 48 | = (attr != NULL |
12c3bb77 | 49 | ? (struct pthread_barrierattr *) attr |
69854bb5 | 50 | : &default_barrierattr); |
76a50749 | 51 | |
76a50749 UD |
52 | ibarrier = (struct pthread_barrier *) barrier; |
53 | ||
54 | /* Initialize the individual fields. */ | |
b02840ba TR |
55 | ibarrier->in = 0; |
56 | ibarrier->out = 0; | |
57 | ibarrier->count = count; | |
58 | ibarrier->current_round = 0; | |
59 | ibarrier->shared = (iattr->pshared == PTHREAD_PROCESS_PRIVATE | |
60 | ? FUTEX_PRIVATE : FUTEX_SHARED); | |
d8ff3792 | 61 | |
76a50749 UD |
62 | return 0; |
63 | } | |
90dd5913 | 64 | weak_alias (__pthread_barrier_init, pthread_barrier_init) |