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/* Copyright (C) 2005 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 OpenMP Library (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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) 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 Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with libgomp; see the file COPYING.LIB. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* As a special exception, if you link this library with other files, some
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of which are compiled with GCC, to produce an executable, this library
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does not by itself cause the resulting executable to be covered by the
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GNU General Public License. This exception does not however invalidate
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any other reasons why the executable file might be covered by the GNU
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General Public License. */
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/* This is the default PTHREADS implementation of the public OpenMP
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locking primitives.
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Because OpenMP uses different entry points for normal and recursive
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locks, and pthreads uses only one entry point, a system may be able
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to do better and streamline the locking as well as reduce the size
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of the types exported. */
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/* We need Unix98 extensions to get recursive locks. On Tru64 UNIX V4.0F,
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the declarations are available without _XOPEN_SOURCE, which actually
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breaks compilation. */
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#ifndef __osf__
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#define _XOPEN_SOURCE 500
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#endif
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#include "libgomp.h"
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void
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omp_init_lock (omp_lock_t *lock)
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{
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pthread_mutex_init (lock, NULL);
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}
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void
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omp_destroy_lock (omp_lock_t *lock)
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{
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pthread_mutex_destroy (lock);
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}
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void
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omp_set_lock (omp_lock_t *lock)
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{
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pthread_mutex_lock (lock);
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}
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void
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omp_unset_lock (omp_lock_t *lock)
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{
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pthread_mutex_unlock (lock);
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}
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int
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omp_test_lock (omp_lock_t *lock)
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{
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return pthread_mutex_trylock (lock) == 0;
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}
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void
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omp_init_nest_lock (omp_nest_lock_t *lock)
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{
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pthread_mutexattr_t attr;
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pthread_mutexattr_init (&attr);
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pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
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pthread_mutex_init (&lock->lock, &attr);
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lock->count = 0;
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pthread_mutexattr_destroy (&attr);
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}
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void
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omp_destroy_nest_lock (omp_nest_lock_t *lock)
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{
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pthread_mutex_destroy (&lock->lock);
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}
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void
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omp_set_nest_lock (omp_nest_lock_t *lock)
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{
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pthread_mutex_lock (&lock->lock);
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lock->count++;
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}
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void
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omp_unset_nest_lock (omp_nest_lock_t *lock)
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{
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lock->count--;
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pthread_mutex_unlock (&lock->lock);
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}
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int
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omp_test_nest_lock (omp_nest_lock_t *lock)
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{
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if (pthread_mutex_trylock (&lock->lock) == 0)
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return ++lock->count;
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return 0;
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}
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ialias (omp_init_lock)
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ialias (omp_init_nest_lock)
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ialias (omp_destroy_lock)
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ialias (omp_destroy_nest_lock)
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ialias (omp_set_lock)
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ialias (omp_set_nest_lock)
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ialias (omp_unset_lock)
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ialias (omp_unset_nest_lock)
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ialias (omp_test_lock)
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ialias (omp_test_nest_lock)
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