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HxRefCountBase.h

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/*
 *  Copyright (c) 2000, University of Amsterdam, The Netherlands.
 *  All rights reserved.
 *
 *
 *  Author(s):
 *  Marc Navarro            (mnavarro@wins.uva.nl)
 */

#ifndef HxRefCountBase_h
#define HxRefCountBase_h


class HxRefCountBase
{
public:

    virtual void            addRef(int num = 1);
    virtual void            removeRef(); // also with num?
    virtual void            destroy() = 0;

    int                     refCnt() const;
protected:
                            HxRefCountBase();
    virtual                 ~HxRefCountBase();

private:
    int                     _refCnt;
};


inline
HxRefCountBase::HxRefCountBase() : _refCnt(0)
{
}

inline
HxRefCountBase::~HxRefCountBase()
{
}

inline void
HxRefCountBase::addRef(int num)
{ 
    _refCnt += num; 
} 

inline void
HxRefCountBase::removeRef()
{ 
    std::cout << "removing ref from " << _refCnt << std::endl;
    if (--_refCnt <= 0) 
        destroy(); 
}

inline int
HxRefCountBase::refCnt() const
{
    return _refCnt;
}

#endif

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