RefManager.h

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/*
* This file is part of Project SkyFire https://www.projectskyfire.org.
* See LICENSE.md file for Copyright information
*/
 
#ifndef _REFMANAGER_H
#define _REFMANAGER_H
//=====================================================
 
#include "Dynamic/LinkedList.h"
#include "Dynamic/LinkedReference/Reference.h"
 
template <class TO, class FROM> class RefManager : public LinkedListHead
{
public:
    typedef LinkedListHead::Iterator< Reference<TO, FROM> > iterator;
    RefManager() { }
    virtual ~RefManager() { clearReferences(); }
 
    Reference<TO, FROM>* getFirst() { return ((Reference<TO, FROM>*) LinkedListHead::getFirst()); }
    Reference<TO, FROM> const* getFirst() const { return ((Reference<TO, FROM> const*) LinkedListHead::getFirst()); }
    Reference<TO, FROM>* getLast() { return ((Reference<TO, FROM>*) LinkedListHead::getLast()); }
    Reference<TO, FROM> const* getLast() const { return ((Reference<TO, FROM> const*) LinkedListHead::getLast()); }
 
    iterator begin() { return iterator(getFirst()); }
    iterator end() { return iterator(NULL); }
    iterator rbegin() { return iterator(getLast()); }
    iterator rend() { return iterator(NULL); }
 
    void clearReferences()
    {
        LinkedListElement* ref;
        while ((ref = getFirst()) != NULL)
        {
            ((Reference<TO, FROM>*) ref)->invalidate();
            ref->delink();                              // the delink might be already done by invalidate(), but doing it here again does not hurt and insures an empty list
        }
    }
};
 
//=====================================================
#endif