/*

 * Copyright (c) 2018, 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.

 *

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 */

#ifndef SHARE_GC_SHARED_BEHAVIOURS_HPP

#define SHARE_GC_SHARED_BEHAVIOURS_HPP

#include "memory/iterator.hpp"

#include "oops/oopsHierarchy.hpp"

// This is the behaviour for checking if a CompiledMethod is unloading

// or has unloaded due to having phantomly dead oops in it after a GC.

class IsUnloadingBehaviour {

  static IsUnloadingBehaviour* _current;

public:

  virtual bool is_unloading(CompiledMethod* cm) const = 0;

  static IsUnloadingBehaviour* current() { return _current; }

  static void set_current(IsUnloadingBehaviour* current) { _current = current; }

};

class ClosureIsUnloadingBehaviour: public IsUnloadingBehaviour {

  BoolObjectClosure *const _cl;

public:

  ClosureIsUnloadingBehaviour(BoolObjectClosure* is_alive)

    : _cl(is_alive)

  { }

  virtual bool is_unloading(CompiledMethod* cm) const;

};

#endif // SHARE_GC_SHARED_BEHAVIOURS_HPP