AutoPtr.h

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#ifndef __AUTO_PTR_H
#define __AUTO_PTR_H

#include <set>
#include <esg/Export>

namespace esg {

#define INSTANTIATE_AUTOPTR_STATIC_MEMBERS(T)             \
    template<> std::set<AutoPtr<T>*> AutoPtr<T>::_repos = \
        std::set<AutoPtr<T>*>();

template <class T> class OGSCENE_EXPORT AutoPtr {
protected:
        T *                          _pObject; 
        std::set<void*>              _ref;     
        static std::set<AutoPtr<T>*> _repos;   

protected:
        void _unregister (void * pR) { _ref.erase(pR); }

        //    AutoPtr<T> (const AutoPtr<T>&);

        ~AutoPtr<T> () {
            if (_pObject) { delete _pObject; _pObject = NULL; }
            if (_ref.size()) {
                fprintf(stderr,"AutoPtr Error: Have registered references\n");
                _ref.clear();
            }
        }
    
public:
        AutoPtr<T>(T * t) : _pObject(t) { _repos.insert(this); }

        static bool destroy (AutoPtr<T>* pA, void* pR) {
            if (pA && pR) {
                pA->_unregister(pR);
                if (!pA->hasReferer()) {
                    _repos.erase(pA);
                    delete pA;
                    return true;
                }
            }
            return false;
        }

        void registerReferer (void * pR) { _ref.insert(pR); }

        int hasReferer () const { return _ref.size(); }

        T* origObject() { return _pObject; }
};

}; // namespace

#endif // __AUTO_PTR_H

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