1 /*
   2  * Copyright (c) 2001, 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_G1CONCURRENTREFINETHREAD_HPP
  26 #define SHARE_GC_G1_G1CONCURRENTREFINETHREAD_HPP
  27 
  28 #include "gc/g1/dirtyCardQueue.hpp"
  29 #include "gc/shared/concurrentGCThread.hpp"
  30 
  31 // Forward Decl.
  32 class CardTableEntryClosure;
  33 class G1ConcurrentRefine;
  34 
  35 // One or more G1 Concurrent Refinement Threads may be active if concurrent
  36 // refinement is in progress.
  37 class G1ConcurrentRefineThread: public ConcurrentGCThread {
  38   friend class VMStructs;
  39   friend class G1CollectedHeap;
  40 
  41   double _vtime_start;  // Initial virtual time.
  42   double _vtime_accum;  // Accumulated virtual time.
  43   uint _worker_id;
  44 
  45   bool _active;
  46   Monitor* _monitor;
  47   G1ConcurrentRefine* _cr;
  48 
  49   void wait_for_completed_buffers();
  50 
  51   void set_active(bool x) { _active = x; }
  52   // Deactivate this thread.
  53   void deactivate();
  54 
  55   bool is_primary() { return (_worker_id == 0); }
  56 
  57   void run_service();
  58   void stop_service();
  59 public:
  60   G1ConcurrentRefineThread(G1ConcurrentRefine* cg1r, uint worker_id);
  61 
  62   bool is_active();
  63   // Activate this thread.
  64   void activate();
  65 
  66   // Total virtual time so far.
  67   double vtime_accum() { return _vtime_accum; }
  68 };
  69 
  70 #endif // SHARE_GC_G1_G1CONCURRENTREFINETHREAD_HPP