///////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2002-2016, Open Design Alliance (the "Alliance").
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// All rights reserved.
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//
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// This software and its documentation and related materials are owned by
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// the Alliance. The software may only be incorporated into application
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// programs owned by members of the Alliance, subject to a signed
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// Membership Agreement and Supplemental Software License Agreement with the
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// Alliance. The structure and organization of this software are the valuable
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// trade secrets of the Alliance and its suppliers. The software is also
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// protected by copyright law and international treaty provisions. Application
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// programs incorporating this software must include the following statement
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// with their copyright notices:
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//
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// This application incorporates Teigha(R) software pursuant to a license
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// agreement with Open Design Alliance.
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// Teigha(R) Copyright (C) 2002-2016 by Open Design Alliance.
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// All rights reserved.
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//
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// By use of this software, its documentation or related materials, you
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// acknowledge and accept the above terms.
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///////////////////////////////////////////////////////////////////////////////
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#if !defined(_ODREFCOUNTIMPL_INCLUDED_)
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#define _ODREFCOUNTIMPL_INCLUDED_
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#include "TD_PackPush.h"
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#include "RxObject.h"
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/** \details
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Template class that provides the reference counting functionality needed
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to instantiate objects that are descended from OdRxObject.
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<group OdRx_Classes>
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*/
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template<class T, class TInterface = T>
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class OdRefCountImpl : public T
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{
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/** \details
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Allows to create OdRefCountImpl<T> instances inside this class only.
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*/
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OdUInt32 m_nRefCounter;
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/** \details
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Assignment operator prohibited.
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*/
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OdRefCountImpl& operator = (const OdRefCountImpl&);
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/** \details
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Allows to create OdRefCountImpl<T> instances inside this class only.
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*/
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ODRX_HEAP_OPERATORS();
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/** \details
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Constructor. Sets the reference count to one.
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*/
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OdRefCountImpl() : m_nRefCounter(1) {}
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public:
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/** \details
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Increments the reference count.
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*/
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void addRef()
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{
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++m_nRefCounter;
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}
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/** \details
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Decrements the reference count, and deletes this object if the reference count
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reaches zero.
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*/
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void release()
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{
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ODA_ASSERT((m_nRefCounter > 0));
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if (!(--m_nRefCounter))
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{
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T::onFinalRelease();
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delete this;
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}
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}
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long numRefs() const { return m_nRefCounter; }
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/** \details
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Creates an instance of OdRefCountImpl<T, TInterface>
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and returns SmartPointer to it.
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*/
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static OdSmartPtr<TInterface> createObject()
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{
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return OdSmartPtr<TInterface>(static_cast<TInterface*>(new OdRefCountImpl<T, TInterface>), kOdRxObjAttach);
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}
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};
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#define ODREFCOUNTIMPL_CONSTR(CLASS, pRes) pRes = OdRefCountImpl<CLASS>::createObject()
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#include "TD_PackPop.h"
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#endif // !defined(_ODREFCOUNTIMPL_INCLUDED_)
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