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_G1SHAREDDIRTYCARDQUEUE_HPP
  26 #define SHARE_GC_G1_G1SHAREDDIRTYCARDQUEUE_HPP
  27 
  28 #include "utilities/globalDefinitions.hpp"
  29 
  30 class G1DirtyCardQueueSet;
  31 
  32 class G1SharedDirtyCardQueue {
  33   G1DirtyCardQueueSet* const _qset;
  34   void** _buffer;
  35   size_t _index;
  36 
  37   // Noncopyable
  38   G1SharedDirtyCardQueue(const G1SharedDirtyCardQueue&);
  39   G1SharedDirtyCardQueue& operator=(const G1SharedDirtyCardQueue&);
  40 
  41 public:
  42   G1SharedDirtyCardQueue(G1DirtyCardQueueSet* qset);
  43   ~G1SharedDirtyCardQueue();    // flushes the queue.
  44 
  45   void enqueue(void* card_ptr);
  46 
  47   // Flush any pending entries to the qset and remove the buffer.
  48   // Not thread-safe.
  49   void flush();
  50 
  51   // Discard any pending entries.
  52   // Not thread-safe.
  53   void reset();
  54 };
  55 
  56 #endif // SHARE_GC_G1_G1SHAREDDIRTYCARDQUEUE_HPP