69 lines
1.5 KiB
C++
69 lines
1.5 KiB
C++
#ifndef BOOST_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
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#define BOOST_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
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//
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// enable_shared_from_this.hpp
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//
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// Copyright (c) 2002 Peter Dimov
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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// http://www.boost.org/libs/smart_ptr/enable_shared_from_this.html
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//
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#include <boost/weak_ptr.hpp>
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#include <boost/shared_ptr.hpp>
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#include <boost/assert.hpp>
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//#include <boost/config.hpp>
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namespace boost
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{
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template<class T> class enable_shared_from_this
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{
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protected:
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enable_shared_from_this()
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{
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}
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enable_shared_from_this(enable_shared_from_this const &)
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{
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}
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enable_shared_from_this & operator=(enable_shared_from_this const &)
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{
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return *this;
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}
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~enable_shared_from_this()
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{
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}
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public:
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shared_ptr<T> shared_from_this()
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{
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shared_ptr<T> p(_internal_weak_this);
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BOOST_ASSERT(p.get() == this);
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return p;
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}
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shared_ptr<T const> shared_from_this() const
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{
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shared_ptr<T const> p(_internal_weak_this);
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BOOST_ASSERT(p.get() == this);
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return p;
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}
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typedef T _internal_element_type; // for bcc 5.5.1
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weak_ptr<_internal_element_type> _internal_weak_this;
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};
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} // namespace boost
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#endif // #ifndef BOOST_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
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