Add tests for strfrom functions
[glibc.git] / nptl / pthread_barrier_init.c
blob822e17e49549ebba1d5b693dab9a71602149b19e
1 /* Copyright (C) 2002-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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.
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.
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 <http://www.gnu.org/licenses/>. */
19 #include <errno.h>
20 #include "pthreadP.h"
21 #include <futex-internal.h>
22 #include <kernel-features.h>
25 static const struct pthread_barrierattr default_barrierattr =
27 .pshared = PTHREAD_PROCESS_PRIVATE
31 int
32 __pthread_barrier_init (pthread_barrier_t *barrier,
33 const pthread_barrierattr_t *attr, unsigned int count)
35 struct pthread_barrier *ibarrier;
37 /* XXX EINVAL is not specified by POSIX as a possible error code for COUNT
38 being too large. See pthread_barrier_wait for the reason for the
39 comparison with BARRIER_IN_THRESHOLD. */
40 if (__glibc_unlikely (count == 0 || count >= BARRIER_IN_THRESHOLD))
41 return EINVAL;
43 const struct pthread_barrierattr *iattr
44 = (attr != NULL
45 ? (struct pthread_barrierattr *) attr
46 : &default_barrierattr);
48 ibarrier = (struct pthread_barrier *) barrier;
50 /* Initialize the individual fields. */
51 ibarrier->in = 0;
52 ibarrier->out = 0;
53 ibarrier->count = count;
54 ibarrier->current_round = 0;
55 ibarrier->shared = (iattr->pshared == PTHREAD_PROCESS_PRIVATE
56 ? FUTEX_PRIVATE : FUTEX_SHARED);
58 return 0;
60 weak_alias (__pthread_barrier_init, pthread_barrier_init)