////////////////////////////////////////////////////////////////////////////// | |
// | |
// This file is the adaptation for Interprocess of boost/enable_shared_from_this.hpp | |
// | |
// (C) Copyright Peter Dimov 2002 | |
// (C) Copyright Ion Gaztanaga 2006. Distributed under the Boost | |
// Software License, Version 1.0. (See accompanying file | |
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
// | |
// See http://www.boost.org/libs/interprocess for documentation. | |
// | |
////////////////////////////////////////////////////////////////////////////// | |
#ifndef BOOST_INTERPROCESS_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED | |
#define BOOST_INTERPROCESS_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED | |
#include <boost/interprocess/detail/workaround.hpp> | |
#include <boost/interprocess/detail/config_begin.hpp> | |
#include <boost/assert.hpp> | |
#include <boost/interprocess/smart_ptr/weak_ptr.hpp> | |
#include <boost/interprocess/smart_ptr/shared_ptr.hpp> | |
//!\file | |
//!Describes an utility to form a shared pointer from this | |
namespace boost{ | |
namespace interprocess{ | |
//!This class is used as a base class that allows a shared_ptr to the current | |
//!object to be obtained from within a member function. | |
//!enable_shared_from_this defines two member functions called shared_from_this | |
//!that return a shared_ptr<T> and shared_ptr<T const>, depending on constness, to this. | |
template<class T, class A, class D> | |
class enable_shared_from_this | |
{ | |
/// @cond | |
protected: | |
enable_shared_from_this() | |
{} | |
enable_shared_from_this(enable_shared_from_this const &) | |
{} | |
enable_shared_from_this & operator=(enable_shared_from_this const &) | |
{ return *this; } | |
~enable_shared_from_this() | |
{} | |
/// @endcond | |
public: | |
shared_ptr<T, A, D> shared_from_this() | |
{ | |
shared_ptr<T, A, D> p(_internal_weak_this); | |
BOOST_ASSERT(detail::get_pointer(p.get()) == this); | |
return p; | |
} | |
shared_ptr<T const, A, D> shared_from_this() const | |
{ | |
shared_ptr<T const, A, D> p(_internal_weak_this); | |
BOOST_ASSERT(detail::get_pointer(p.get()) == this); | |
return p; | |
} | |
/// @cond | |
typedef T element_type; | |
mutable weak_ptr<element_type, A, D> _internal_weak_this; | |
/// @endcond | |
}; | |
} // namespace interprocess | |
} // namespace boost | |
#include <boost/interprocess/detail/config_end.hpp> | |
#endif // #ifndef BOOST_INTERPROCESS_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED | |