/*

 * Copyright (c) 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#ifndef SHARE_GC_G1_G1FULLGCPREPARETASK_HPP

#define SHARE_GC_G1_G1FULLGCPREPARETASK_HPP

#include "gc/g1/g1FullGCCompactionPoint.hpp"

#include "gc/g1/g1FullGCScope.hpp"

#include "gc/g1/g1FullGCTask.hpp"

#include "gc/g1/g1RootProcessor.hpp"

#include "gc/g1/g1StringDedup.hpp"

#include "gc/g1/heapRegionManager.hpp"

#include "gc/shared/referenceProcessor.hpp"

class G1CMBitMap;

class G1FullGCPrepareTask : public G1FullGCTask {

protected:

  volatile bool     _freed_regions;

  HeapRegionClaimer _hrclaimer;

  void set_freed_regions();

public:

  G1FullGCPrepareTask(G1FullCollector* collector);

  void work(uint worker_id);

  void prepare_serial_compaction();

  bool has_freed_regions();

protected:

  class G1CalculatePointersClosure : public HeapRegionClosure {

  protected:

    G1CollectedHeap* _g1h;

    G1CMBitMap* _bitmap;

    G1FullGCCompactionPoint* _cp;

    uint _humongous_regions_removed;

    virtual void prepare_for_compaction(HeapRegion* hr);

    void prepare_for_compaction_work(G1FullGCCompactionPoint* cp, HeapRegion* hr);

    void free_humongous_region(HeapRegion* hr);

    void reset_region_metadata(HeapRegion* hr);

  public:

    G1CalculatePointersClosure(G1CMBitMap* bitmap,

                               G1FullGCCompactionPoint* cp);

    void update_sets();

    bool do_heap_region(HeapRegion* hr);

    bool freed_regions();

  };

  class G1PrepareCompactLiveClosure : public StackObj {

    G1FullGCCompactionPoint* _cp;

  public:

    G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp);

    size_t apply(oop object);

  };

  class G1RePrepareClosure : public StackObj {

    G1FullGCCompactionPoint* _cp;

    HeapRegion* _current;

  public:

    G1RePrepareClosure(G1FullGCCompactionPoint* hrcp,

                       HeapRegion* hr) :

        _cp(hrcp),

        _current(hr) { }

    size_t apply(oop object);

  };

};

#endif // SHARE_GC_G1_G1FULLGCPREPARETASK_HPP