object.h

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/*
 * /phoenix/include/triton/object.h
 *
 * This file is a part of Phoenix operating system.
 * Copyright (c) 2011-2012, Artyom Lebedev <artyom.lebedev@gmail.com>
 * All rights reserved.
 * See COPYING file for copyright details.
 */

#ifndef OBJECT_H_
#define OBJECT_H_

namespace triton {

class Object {
private:
    int _refCount = 0;
public:

    Object() {}

    virtual
    ~Object()
    {
        /* Should be destructed only when last reference released. */
        ASSERT(!_refCount);
    }

    inline void
    AddRef()
    {
        _refCount++;
    }

    inline int
    Release()
    {
        ASSERT(_refCount);
        return --_refCount;
    }

    virtual const char *
    __name__() const
    {
        return "Object";
    }

    typedef u64 hash_t;

    virtual hash_t
    __hash__() const
    {
        /* Default implementation returns constant value. */
        return 1;
    }
};

inline Object::hash_t
hash(Object &obj)
{
    return obj.__hash__();
}

inline Object::hash_t
hash(Object &&obj)
{
    return obj.__hash__();
}

class Container: public Object {
public:
    virtual size_t
    __len__()
    {
        return 0;
    }
};

inline size_t
len(Container &obj)
{
    return obj.__len__();
}

inline size_t
len(Container &&obj)
{
    return obj.__len__();
}

class Iterable: public Container {
    //XXX
};

} /* namespace triton */

#endif /* OBJECT_H_ */