KeosSmartPtr.h

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/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program 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 2 of the License, or (at your option) any later
 * version.
 *
 * This program 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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#ifndef KEOS_SMARTPTR_H
#define KEOS_SMARTPTR_H

#include "KeosSmartPtrPolicies.h"
#include "KeosException.h"

namespace Keos
{
  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership = CRefCount >
  class CSmartPtr : public Ownership<T>
  {
  public :

    CSmartPtr();

    CSmartPtr(const CSmartPtr& Copy);

    CSmartPtr(T* pPointer);

    ~CSmartPtr();

    T& operator * () const;

    T* operator ->() const;

    const CSmartPtr& operator =(const CSmartPtr& Pointer);

    operator T*() const;

  private :

    void Swap(CSmartPtr& Ptr);

    T* m_pData;
  };


  //=======================================================================
  // CSmartPtr inline functions
  //=======================================================================

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline CSmartPtr<T, Ownership>::CSmartPtr() :
      m_pData(NULL)
  {}

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline CSmartPtr<T, Ownership>::CSmartPtr(const CSmartPtr<T, Ownership>& Copy) :
      Ownership<T>(Copy),
      m_pData      (Clone(Copy.m_pData))
  {}

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline CSmartPtr<T, Ownership>::CSmartPtr(T* pPointer) :
      m_pData(pPointer)
  {}

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline CSmartPtr<T, Ownership>::~CSmartPtr()
  {
    Release(m_pData);
  }

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline void CSmartPtr<T, Ownership>::Swap(CSmartPtr<T, Ownership>& Ptr)
  {
    Ownership<T>::Swap(Ptr);
    std::swap(m_pData, Ptr.m_pData);
  }

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline T& CSmartPtr<T, Ownership>::operator *() const
  {
    Assert(m_pData != NULL);

    return *m_pData;
  }

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline T* CSmartPtr<T, Ownership>::operator ->() const
  {
    Assert(m_pData != NULL);

    return m_pData;
  }

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline const CSmartPtr<T, Ownership>& CSmartPtr<T, Ownership>::operator =(const CSmartPtr<T, Ownership>& Pointer)
  {
    CSmartPtr<T, Ownership>(Pointer).Swap(*this);

    return *this;
  }

  //-----------------------------------------------------------------------
  template <class T, template <class> class Ownership >
  inline CSmartPtr<T, Ownership>::operator T*() const
  {
    return m_pData;
  }

} // namespace Keos

#endif // KEOS_SMARTPTR_H

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