/*

 * Copyright (c) 2019, Oracle and/or its affiliates. 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.

 *

 */

#ifndef SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP

#define SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP

#include "gc/shared/cardTable.hpp"

#include "gc/shared/ptrQueue.hpp"

#include "memory/allocation.hpp"

// A closure class for processing card table entries.  Note that we don't

// require these closure objects to be stack-allocated.

class G1CardTableEntryClosure: public CHeapObj<mtGC> {

public:

  typedef CardTable::CardValue CardValue;

  // Process the card whose card table entry is "card_ptr".

  virtual void do_card_ptr(CardValue* card_ptr, uint worker_id) = 0;

  // Process all the card_ptrs in node.

  void apply_to_buffer(BufferNode* node, size_t buffer_size, uint worker_id) {

    void** buffer = BufferNode::make_buffer_from_node(node);

    for (size_t i = node->index(); i < buffer_size; ++i) {

      CardValue* card_ptr = static_cast<CardValue*>(buffer[i]);

      do_card_ptr(card_ptr, worker_id);

    }

  }

};

#endif // SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP