/*

 * Copyright (C) 2012 David Anderson

 *

 * This file is part of JITCraft.

 *

 * JITCraft is free software: you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free

 * Software Foundation, either version 3 of the License, or (at your option)

 * any later version.

 * 

 * Foobar 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 for more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * JITCraft. If not, see http://www.gnu.org/licenses/.

 */

#ifndef _include_jitcraft_barriers_h_

#define _include_jitcraft_barriers_h_

namespace ke {

class Object;

// Used to store unbarriered heap locations.

template <typename T>

class Unbarriered

{

    T *obj_;

  public:

    Unbarriered()

      : obj_(NULL)

    {

    }

    T *operator ->() const {

        return operator *();

    }

    T *operator *() const {

        return static_cast<T *>(obj_);

    }

    Unbarriered &operator =(T *obj) {

        obj_ = obj;

        return *this;

    }

    Object **address() {

        return reinterpret_cast<Object **>(&obj_);

    }

    operator bool () const {

        return !!obj_;

    }

    operator T*() const {

        return static_cast<T *>(obj_);

    }

};

// Used to store unbarriered heap locations.

template <typename T>

class Barriered

{

    T *obj_;

  public:

    Barriered()

      : obj_(NULL)

    {

    }

    T *operator ->() const {

        return operator *();

    }

    T *operator *() const {

        return static_cast<T *>(obj_);

    }

    Barriered &operator =(T *obj) {

        obj_ = obj;

        return *this;

    }

    Object **addr() {

        return reinterpret_cast<Object **>(&obj_);

    }

    operator bool () const {

        return !!obj_;

    }

    operator T*() const {

        return static_cast<T *>(obj_);

    }

};

}

#endif // _include_jitcraft_barriers_h_