IReferenceCounted.h

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __I_IREFERENCE_COUNTED_H_INCLUDED__
#define __I_IREFERENCE_COUNTED_H_INCLUDED__

#include "irrTypes.h"

namespace irr
{


    class IReferenceCounted
    {
    public:

        IReferenceCounted()
            : DebugName(0), ReferenceCounter(1)
        {
        }

        virtual ~IReferenceCounted()
        {
        }


        void grab() const { ++ReferenceCounter; }


        bool drop() const
        {
            // someone is doing bad reference counting.
            _IRR_DEBUG_BREAK_IF(ReferenceCounter <= 0)

            --ReferenceCounter;
            if (!ReferenceCounter)
            {
                delete this;
                return true;
            }

            return false;
        }


        s32 getReferenceCount() const
        {
            return ReferenceCounter;
        }


        const c8* getDebugName() const
        {
            return DebugName;
        }

    protected:


        void setDebugName(const c8* newName)
        {
            DebugName = newName;
        }

    private:

        const c8* DebugName;

        mutable s32 ReferenceCounter;
    };

} // end namespace irr

#endif