Dario Sassi
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
//----------------------------------------------------------------------------
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// EgalTech 2013-2023
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//----------------------------------------------------------------------------
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// File : EgtPointerOwner.h Data : 27.03.23 Versione : 2.5c3
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// Contenuto : Dichiarazione classe template per puntatore con auto rilascio.
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//
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//
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//
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// Modifiche : 25.11.13 DS Creazione modulo.
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// 27.03.23 DS Aggiunta Set( PtrOwner<T2>& RPT).
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//
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//----------------------------------------------------------------------------
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#pragma once
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//----------------------------------------------------------------------------
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template <class T>
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class PtrOwner
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{
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public :
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explicit PtrOwner( void) : m_pT( nullptr) {}
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explicit PtrOwner( T* pT) : m_pT( pT) {}
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PtrOwner( PtrOwner<T>&& RPT) noexcept : m_pT( Release( RPT)) {}
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PtrOwner( const PtrOwner<T>& RPT) = delete ;
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~PtrOwner( void) { Reset() ; }
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bool Set( T* pT) { Reset() ; m_pT = pT ; return ( m_pT != nullptr) ; }
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template <class T2> bool Set( PtrOwner<T2>& RPT)
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{ if ( (void*) this == (void*) &RPT)
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return true ;
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return Set( Release( RPT)) ;
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}
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void Reset( void) { if ( m_pT != nullptr) delete m_pT ; m_pT = nullptr ; }
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T& operator*() const { return *m_pT ; }
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T* operator->() const { return m_pT ; }
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operator T*() const { return m_pT ; }
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PtrOwner<T>& operator=( PtrOwner<T>&& RPT)
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{ if ( this != &RPT)
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Set( Release( RPT)) ;
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return (*this) ;
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}
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PtrOwner<T>& operator=( const PtrOwner<T>& RPT) = delete ;
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private :
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T* m_pT ;
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template <class T> friend bool IsNull( PtrOwner<T>& RPT) ;
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template <class T> friend T* Get( PtrOwner<T>& RPT) ;
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template <class T> friend T* Release( PtrOwner<T>& RPT) ;
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} ;
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//----------------------------------------------------------------------------
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template <class T>
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bool
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IsNull( PtrOwner<T>& RPT)
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{
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return ( RPT.m_pT == nullptr) ;
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}
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//----------------------------------------------------------------------------
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template <class T>
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T*
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Get( PtrOwner<T>& RPT)
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{
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return RPT.m_pT ;
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}
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//----------------------------------------------------------------------------
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template <class T>
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T*
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Release( PtrOwner<T>& RPT)
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{
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T* pT = RPT.m_pT ;
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RPT.m_pT = nullptr ;
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return pT ;
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}
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