glibc/nptl/pthread_barrier_init.c
Paul Eggert 2b778ceb40 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

65 lines
2.1 KiB
C

/* Copyright (C) 2002-2021 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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include "pthreadP.h"
#include <futex-internal.h>
#include <kernel-features.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;
}
weak_alias (__pthread_barrier_init, pthread_barrier_init)