jdk-24/hotspot/src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp

/*
 * Copyright 2001-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
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// The Concurrent Mark GC Thread (could be several in the future).
// This is copied from the Concurrent Mark Sweep GC Thread
// Still under construction.

class ConcurrentMark;

class ConcurrentMarkThread: public ConcurrentGCThread {
  friend class VMStructs;

  double _vtime_start;  // Initial virtual time.
  double _vtime_accum;  // Accumulated virtual time.

  double _vtime_mark_accum;
  double _vtime_count_accum;

 public:
  virtual void run();

 private:
  ConcurrentMark*                  _cm;
  bool                             _started;
  bool                             _in_progress;

  void sleepBeforeNextCycle();

  static SurrogateLockerThread*         _slt;

 public:
  // Constructor
  ConcurrentMarkThread(ConcurrentMark* cm);

  static void makeSurrogateLockerThread(TRAPS);
  static SurrogateLockerThread* slt() { return _slt; }

  // Printing
  void print_on(outputStream* st) const;
  void print() const;

  // Total virtual time so far.
  double vtime_accum();
  // Marking virtual time so far
  double vtime_mark_accum();
  // Counting virtual time so far.
  double vtime_count_accum() { return _vtime_count_accum; }

  ConcurrentMark* cm()                           { return _cm;     }

  void            set_started()                  { _started = true;   }
  void            clear_started()                { _started = false;  }
  bool            started()                      { return _started;   }

  void            set_in_progress()              { _in_progress = true;   }
  void            clear_in_progress()            { _in_progress = false;  }
  bool            in_progress()                  { return _in_progress;   }

  // Yield for GC
  void            yield();

  // shutdown
  void stop();
};