//----------------------------------------------------------------------------
//  EgalTech    2013-2013
//----------------------------------------------------------------------------
// File : EgtPointerOwner.h      Data : 04.12.13          Versione : 1.4a3
// Contenuto : Dichiarazione classe template per puntatore con auto rilascio.
//
//
//
// Modifiche : 25.11.13 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

#pragma once


//----------------------------------------------------------------------------
template <class T>
class PtrOwner
{
   public :
      explicit PtrOwner( void) : m_pT( nullptr) {}
      explicit PtrOwner( T* pT) : m_pT( pT) {}
      ~PtrOwner( void) { Reset() ; }
      bool Set( T* pT) { Reset() ; m_pT = pT ; return ( m_pT != nullptr) ; }
      void Reset( void) { if ( m_pT != nullptr) delete m_pT ; m_pT = nullptr ; } 
      T& operator*() const { return *m_pT ; }
      T* operator->() const { return m_pT ; }
      operator T*() const { return m_pT ; }
       
   private :
      T* m_pT ;

   template <class T> friend bool IsNull( PtrOwner<T>& RPT) ;
   template <class T> friend T* Get( PtrOwner<T>& RPT) ;
   template <class T> friend T* Release( PtrOwner<T>& RPT) ;
} ;

//----------------------------------------------------------------------------
template <class T>
bool
IsNull( PtrOwner<T>& RPT)
{
   return ( RPT.m_pT == nullptr) ;
}

//----------------------------------------------------------------------------
template <class T>
T*
Get( PtrOwner<T>& RPT)
{
   return RPT.m_pT ;
}

//----------------------------------------------------------------------------
template <class T>
T*
Release( PtrOwner<T>& RPT)
{
   T* pT = RPT.m_pT ;
   RPT.m_pT = nullptr ;
   return pT ;
}