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58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Copyright (C) 2005-2019 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This file contains helpers for the ATOMIC construct. */
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#include "libgomp.h"
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/* This mutex is used when atomic operations don't exist for the target
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in the mode requested. The result is not globally atomic, but works so
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long as all parallel references are within #pragma omp atomic directives.
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According to responses received from omp@openmp.org, appears to be within
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spec. Which makes sense, since that's how several other compilers
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handle this situation as well. */
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static gomp_mutex_t atomic_lock;
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void
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GOMP_atomic_start (void)
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{
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gomp_mutex_lock (&atomic_lock);
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}
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void
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GOMP_atomic_end (void)
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{
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gomp_mutex_unlock (&atomic_lock);
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}
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#if !GOMP_MUTEX_INIT_0
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static void __attribute__((constructor))
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initialize_atomic (void)
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{
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gomp_mutex_init (&atomic_lock);
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}
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#endif
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