SmrtPtr.h

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/*
* True Reality Open Source Game and Simulation Engine
* Copyright © 2021 Acid Rain Studios LLC
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3.0 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @author Maxim Serebrennik
*/

#pragma once

#include <trUtil/Hash.h>

#include <osg/ref_ptr>

#include <iostream>

namespace trBase
{
    template<class T>
    class SmrtPtr
    {
    public:

        SmrtPtr() { mOSGSmartPtr = nullptr; }

        SmrtPtr(T* t) { mOSGSmartPtr = t;}


        SmrtPtr(const SmrtPtr& smPt) { mOSGSmartPtr = smPt.Get(); }

        T* Get() const { return mOSGSmartPtr.get(); }

        T* Release() { return mOSGSmartPtr.release(); }

        void Swap(SmrtPtr& sp) { mOSGSmartPtr.swap(sp); }

        bool Valid() const { return mOSGSmartPtr.valid(); }

        bool operator ! () const { return mOSGSmartPtr.operator!(); }

        T& operator * () const { return mOSGSmartPtr.operator*(); }

        T* operator -> () const { return mOSGSmartPtr.get(); }

        operator T* () const { return mOSGSmartPtr; }

        operator osg::ref_ptr<T> () const { return mOSGSmartPtr;}

        operator osg::ref_ptr<T>& () { return mOSGSmartPtr; }

        operator const osg::ref_ptr<T>& () const { return mOSGSmartPtr; }

        operator osg::ref_ptr<T>* () { return &mOSGSmartPtr; }

        friend inline std::ostream& operator<<(std::ostream& ios, const SmrtPtr& smPt)
        {
            ios << smPt.get();
            return ios;
        }

    private:

        osg::ref_ptr<T> mOSGSmartPtr;  //Pointer to the internal OSG smart pointer

    };
}

namespace trUtil
{
    template<class _Key> struct hash<trBase::SmrtPtr<_Key> >
    {
        size_t operator()(const trBase::SmrtPtr<_Key>& keyPtr) const
        {
            return size_t(keyPtr.Get());
        }
    };

    template<class _Key> struct hash<osg::ref_ptr<_Key> >
    {
        size_t operator()(const trBase::SmrtPtr<_Key>& keyPtr) const
        {
            return size_t(keyPtr.Get());
        }
    };
}