/*
 * Copyright (c) 2020, Red Hat, Inc. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * 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/shared/markBitMap.inline.hpp"
#include "gc/shenandoah/shenandoahHeap.hpp"
#include "gc/shenandoah/shenandoahObjectMarker.hpp"

bool ShenandoahObjectMarker::init() {
  assert(SafepointSynchronize::is_at_safepoint(), "safe iteration is only available during safepoints");
  // Bailout if failed to commit aux bitmap
  if (!_heap->commit_aux_bitmap()) {
    _bit_map = NULL;
    return false;
  }
  _bit_map->clear();
  return true;
}

void ShenandoahObjectMarker::done() {
  if (_bit_map != NULL) {
    _heap->uncommit_aux_bit_map();
  }
  delete this;
}

bool ShenandoahObjectMarker::mark(oop o) {
  assert(_bit_map != NULL, "Should have been bailed out");
  if (_bit_map->is_marked(o)) return false;
  _bit_map->mark(o);
  return true;
}

bool ShenandoahObjectMarker::marked(oop o) {
  assert(_bit_map != NULL, "Should have been bailed out");
  return _bit_map->is_marked(o);
}