enable_shared_from_this.h
#ifndef BOOSTER_SMART_PTR_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
#define BOOSTER_SMART_PTR_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
//
// enable_shared_from_this.hpp
//
// Copyright 2002, 2009 Peter Dimov
//
// 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
//
// http://www.boost.org/libs/smart_ptr/enable_shared_from_this.html
//
#include <booster/weak_ptr.h>
#include <booster/shared_ptr.h>
#include <assert.h>
#include <booster/config.h>
namespace booster
{
template<class T> class enable_shared_from_this
{
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()
{
}
public:
shared_ptr<T> shared_from_this()
{
shared_ptr<T> p( weak_this_ );
assert( p.get() == this );
return p;
}
shared_ptr<T const> shared_from_this() const
{
shared_ptr<T const> p( weak_this_ );
assert( p.get() == this );
return p;
}
public: // actually private, but avoids compiler template friendship issues
// Note: invoked automatically by shared_ptr; do not call
template<class X, class Y> void _internal_accept_owner( shared_ptr<X> const * ppx, Y * py ) const
{
if( weak_this_.expired() )
{
weak_this_ = shared_ptr<T>( *ppx, py );
}
}
private:
mutable weak_ptr<T> weak_this_;
};
} // namespace boost
#endif // #ifndef BOOST_SMART_PTR_ENABLE_SHARED_FROM_THIS_HPP_INCLUDED
booster::shared_ptr
Definition: log.h:25
booster::weak_ptr
Definition: log.h:27
booster::enable_shared_from_this
This class is borrowed from boost.
Definition: enable_shared_from_this.h:30