mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-24 23:32:06 +00:00
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/* Copyright (C) 2005-2019 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;
|
|
}
|