50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
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#ifndef __reference_HXX
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#define __reference_HXX
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#pragma once
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/*
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* @(#)_reference.hxx 1.0 2/27/98
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*
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* Copyright (C) 1998,1999 Microsoft Corporation. All rights reserved. *
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*/
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void _assign(IUnknown ** ppref, IUnknown * pref);
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void _release(IUnknown ** ppref);
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template <class T>
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void assign(T ** ppref, T * pref){ _assign((IUnknown **) ppref, pref);}
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//----------------------------------------------------------------------------
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template <class T> class _reference
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{
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private:
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T * _p;
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public:
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_reference() : _p(NULL) {}
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_reference(T * p) : _p(p) { if (_p) _p->AddRef(); }
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_reference(const _reference<T> & r) { _p = r._p; if (_p) _p->AddRef(); }
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~_reference() { _release((IUnknown **)&_p); }
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operator T * () { return _p; }
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operator T * () const { return _p; }
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T & operator * () { return *_p; }
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T * operator -> () { return _p; }
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T * operator -> () const { return _p; }
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T** operator & () { return &_p; }
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_reference & operator = (T * p) { assign(&_p, p); return *this; }
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_reference & operator = (const _reference<T> & r) { return operator=(r._p); }
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};
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#endif __reference_HXX
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