/*

 * Copyright (c) 2015, 2019, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_GC_G1_G1CODEBLOBCLOSURE_HPP

#define SHARE_GC_G1_G1CODEBLOBCLOSURE_HPP

#include "gc/g1/g1CollectedHeap.hpp"

#include "memory/iterator.hpp"

class G1ConcurrentMark;

class nmethod;

class G1CodeBlobClosure : public CodeBlobClosure {

  // Gather nmethod remembered set entries.

  class HeapRegionGatheringOopClosure : public OopClosure {

    G1CollectedHeap* _g1h;

    OopClosure* _work;

    nmethod* _nm;

    template <typename T>

    void do_oop_work(T* p);

  public:

    HeapRegionGatheringOopClosure(OopClosure* oc) : _g1h(G1CollectedHeap::heap()), _work(oc), _nm(NULL) {}

    void do_oop(oop* o);

    void do_oop(narrowOop* o);

    void set_nm(nmethod* nm) {

      _nm = nm;

    }

  };

  // Mark all oops below TAMS.

  class MarkingOopClosure : public OopClosure {

    G1ConcurrentMark* _cm;

    uint _worker_id;

    template <typename T>

    void do_oop_work(T* p);

  public:

    MarkingOopClosure(uint worker_id);

    void do_oop(oop* o);

    void do_oop(narrowOop* o);

  };

  HeapRegionGatheringOopClosure _oc;

  MarkingOopClosure _marking_oc;

  bool _strong;

  void do_code_blob_weak(CodeBlob* cb);

  void do_code_blob_strong(CodeBlob* cb);

public:

  G1CodeBlobClosure(uint worker_id, OopClosure* oc, bool strong) :

    _oc(oc), _marking_oc(worker_id), _strong(strong) { }

  void do_evacuation_and_fixup(nmethod* nm);

  void do_marking(nmethod* nm);

  void do_code_blob(CodeBlob* cb);

};

#endif // SHARE_GC_G1_G1CODEBLOBCLOSURE_HPP