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124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/* Copyright (C) 2005-2020 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 is a generic implementation of the public OpenMP locking primitives in
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terms of internal gomp_mutex_t. It is not meant to be compiled on its own.
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It is #include'd from config/{linux,nvptx}/lock.c. */
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#include <string.h>
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#include "libgomp.h"
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/* The internal gomp_mutex_t and the external non-recursive omp_lock_t
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have the same form. Re-use it. */
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void
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gomp_init_lock_30 (omp_lock_t *lock)
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{
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gomp_mutex_init (lock);
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}
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void
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gomp_destroy_lock_30 (omp_lock_t *lock)
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{
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gomp_mutex_destroy (lock);
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}
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void
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gomp_set_lock_30 (omp_lock_t *lock)
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{
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gomp_mutex_lock (lock);
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}
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void
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gomp_unset_lock_30 (omp_lock_t *lock)
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{
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gomp_mutex_unlock (lock);
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}
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int
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gomp_test_lock_30 (omp_lock_t *lock)
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{
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int oldval = 0;
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return __atomic_compare_exchange_n (lock, &oldval, 1, false,
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MEMMODEL_ACQUIRE, MEMMODEL_RELAXED);
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}
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void
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gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
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{
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memset (lock, '\0', sizeof (*lock));
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}
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void
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gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
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{
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}
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void
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gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
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{
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void *me = gomp_icv (true);
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if (lock->owner != me)
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{
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gomp_mutex_lock (&lock->lock);
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lock->owner = me;
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}
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lock->count++;
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}
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void
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gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
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{
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if (--lock->count == 0)
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{
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lock->owner = NULL;
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gomp_mutex_unlock (&lock->lock);
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}
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}
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int
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gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
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{
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void *me = gomp_icv (true);
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int oldval;
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if (lock->owner == me)
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return ++lock->count;
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oldval = 0;
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if (__atomic_compare_exchange_n (&lock->lock, &oldval, 1, false,
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MEMMODEL_ACQUIRE, MEMMODEL_RELAXED))
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{
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lock->owner = me;
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lock->count = 1;
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return 1;
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}
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return 0;
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}
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