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 "memory/allocation.hpp"
  30 
  31 // A closure class for processing card table entries.  Note that we don't
  32 // require these closure objects to be stack-allocated.
  33 class G1CardTableEntryClosure: public CHeapObj<mtGC> {
  34 public:
  35   typedef CardTable::CardValue CardValue;
  36 
  37   // Process the card whose card table entry is "card_ptr".  If returns
  38   // "false", terminate the iteration early.
  39   virtual bool do_card_ptr(CardValue* card_ptr, uint worker_id) = 0;
  40 };
  41 
  42 #endif // SHARE_GC_G1_G1CARDTABLEENTRYCLOSURE_HPP