/* 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> #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