1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP

    26 #define SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP

    27 

    28 #include "gc/shared/cardTable.hpp"

    29 #include "gc/shared/ptrQueue.hpp"

    30 #include "memory/allocation.hpp"

    31 

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

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

    34 class G1CardTableEntryClosure: public CHeapObj<mtGC> {

    35 public:

    36   typedef CardTable::CardValue CardValue;

    37 

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

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

    40 

    41   // Process all the card_ptrs in node.

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

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

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

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

    46       do_card_ptr(card_ptr, worker_id);

    47     }

    48   }

    49 };

    50 

    51 #endif // SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP