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# KeosSmartPtrPolicies.h

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    00001 /*
    00002  * This source file is part of KEOS (Free 3D Engine)
    00003  * For the latest info, see http://www.keosengine.org/
    00004  * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
    00005  *
    00006  * This program is free software; you can redistribute it and/or modify it under
    00007  * the terms of the GNU Lesser General Public License as published by the Free Software
    00008  * Foundation; either version 2 of the License, or (at your option) any later
    00009  * version.
    00010  *
    00011  * This program is distributed in the hope that it will be useful, but WITHOUT
    00012  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    00013  * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
    00014  *
    00015  * You should have received a copy of the GNU Lesser General Public License along with
    00016  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
    00017  * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
    00018  * http://www.gnu.org/copyleft/lesser.txt.
    00019  *
    00020  */
    00021
    00022 #ifndef KEOS_SMARTPTRPOLICIES_H
    00023 #define KEOS_SMARTPTRPOLICIES_H
    00024
    00025 #include "KeosPrerequisites.h"
    00026
    00027 namespace Keos
    00028 {
    00029     //-----------------------------------------------------------------------
    00033     template <class T>
    00034     class CRefCount
    00035     {
    00036     public :
    00037
    00041         CRefCount() : m_pCounter(new int(1))
    00042         {
    00043         }
    00044
    00048         T* Clone(T* Ptr)
    00049         {
    00050             ++*m_pCounter;
    00051             return Ptr;
    00052         }
    00053
    00057         void Release(T* pPtr)
    00058         {
    00059             if (--*m_pCounter == 0)
    00060             {
    00061                 delete m_pCounter;
    00062                 delete pPtr;
    00063             }
    00064         }
    00065
    00069         void Swap(CRefCount& RefCount)
    00070         {
    00071             std::swap(RefCount.m_pCounter, m_pCounter);
    00072         }
    00073
    00074     private :
    00075
    00077         int* m_pCounter;
    00078     };
    00079
    00080
    00081     //-----------------------------------------------------------------------
    00085     template <class T>
    00086     class CCOMRefCounted
    00087     {
    00088     public :
    00089
    00093         static T* Clone(T* pPtr)
    00094         {
    00095             if (pPtr)
    00096                 pPtr->AddRef();
    00097             return pPtr;
    00098         }
    00099
    00103         static void Release(T* pPtr)
    00104         {
    00105             if (pPtr)
    00106                 pPtr->Release();
    00107         }
    00108
    00112         static void Swap(CCOMRefCounted&)
    00113         {
    00114         }
    00115     };
    00116
    00117 }; // namespace Keos
    00118
    00119 #endif // KEOS_SMARTPTRPOLICIES_H