/*

 * Copyright (c) 2019, Red Hat, Inc. All rights reserved.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

#include "gc/shenandoah/shenandoahClosures.inline.hpp"

#include "gc/shenandoah/shenandoahCodeRoots.hpp"

#include "gc/shenandoah/shenandoahEvacOOMHandler.hpp"

#include "gc/shenandoah/shenandoahParallelCleaning.hpp"

#include "runtime/safepoint.hpp"

ShenandoahClassUnloadingTask::ShenandoahClassUnloadingTask(BoolObjectClosure* is_alive,

                                                           uint num_workers,

                                                           bool unloading_occurred) :

  AbstractGangTask("Parallel Class Unloading Task"),

  _unloading_occurred(unloading_occurred),

  _code_cache_task(num_workers, is_alive, unloading_occurred),

  _klass_cleaning_task() {

  assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");

}

void ShenandoahClassUnloadingTask::work(uint worker_id) {

  ShenandoahEvacOOMScope scope;

  _code_cache_task.work(worker_id);

  // Clean all klasses that were not unloaded.

  // The weak metadata in klass doesn't need to be

  // processed if there was no unloading.

  if (_unloading_occurred) {

    _klass_cleaning_task.work();

  }

}