| /* Copyright (C) 2005-2021 Free Software Foundation, Inc. |
| Contributed by Richard Henderson <rth@redhat.com>. |
| |
| This file is part of the GNU Offloading and Multi Processing Library |
| (libgomp). |
| |
| Libgomp is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| Libgomp 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 General Public License for |
| more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* This is a generic implementation of the public OpenMP locking primitives in |
| terms of internal gomp_mutex_t. It is not meant to be compiled on its own. |
| It is #include'd from config/{linux,nvptx}/lock.c. */ |
| |
| #include <string.h> |
| #include "libgomp.h" |
| |
| /* The internal gomp_mutex_t and the external non-recursive omp_lock_t |
| have the same form. Re-use it. */ |
| |
| void |
| gomp_init_lock_30 (omp_lock_t *lock) |
| { |
| gomp_mutex_init (lock); |
| } |
| |
| void |
| gomp_destroy_lock_30 (omp_lock_t *lock) |
| { |
| gomp_mutex_destroy (lock); |
| } |
| |
| void |
| gomp_set_lock_30 (omp_lock_t *lock) |
| { |
| gomp_mutex_lock (lock); |
| } |
| |
| void |
| gomp_unset_lock_30 (omp_lock_t *lock) |
| { |
| gomp_mutex_unlock (lock); |
| } |
| |
| int |
| gomp_test_lock_30 (omp_lock_t *lock) |
| { |
| int oldval = 0; |
| |
| return __atomic_compare_exchange_n (lock, &oldval, 1, false, |
| MEMMODEL_ACQUIRE, MEMMODEL_RELAXED); |
| } |
| |
| void |
| gomp_init_nest_lock_30 (omp_nest_lock_t *lock) |
| { |
| memset (lock, '\0', sizeof (*lock)); |
| } |
| |
| void |
| gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock) |
| { |
| } |
| |
| void |
| gomp_set_nest_lock_30 (omp_nest_lock_t *lock) |
| { |
| void *me = gomp_icv (true); |
| |
| if (lock->owner != me) |
| { |
| gomp_mutex_lock (&lock->lock); |
| lock->owner = me; |
| } |
| |
| lock->count++; |
| } |
| |
| void |
| gomp_unset_nest_lock_30 (omp_nest_lock_t *lock) |
| { |
| if (--lock->count == 0) |
| { |
| lock->owner = NULL; |
| gomp_mutex_unlock (&lock->lock); |
| } |
| } |
| |
| int |
| gomp_test_nest_lock_30 (omp_nest_lock_t *lock) |
| { |
| void *me = gomp_icv (true); |
| int oldval; |
| |
| if (lock->owner == me) |
| return ++lock->count; |
| |
| oldval = 0; |
| if (__atomic_compare_exchange_n (&lock->lock, &oldval, 1, false, |
| MEMMODEL_ACQUIRE, MEMMODEL_RELAXED)) |
| { |
| lock->owner = me; |
| lock->count = 1; |
| return 1; |
| } |
| |
| return 0; |
| } |