128 lines
2.9 KiB
C++
128 lines
2.9 KiB
C++
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#ifndef BOOST_STATECHART_EVENT_BASE_HPP_INCLUDED
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#define BOOST_STATECHART_EVENT_BASE_HPP_INCLUDED
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//////////////////////////////////////////////////////////////////////////////
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// Copyright 2002-2006 Andreas Huber Doenni
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// Distributed under the Boost Software License, Version 1.0. (See accompany-
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// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//////////////////////////////////////////////////////////////////////////////
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#include <boost/statechart/detail/rtti_policy.hpp>
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#include <boost/statechart/detail/counted_base.hpp>
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#include <boost/assert.hpp>
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#include <boost/intrusive_ptr.hpp>
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#include <boost/config.hpp>
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namespace boost
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{
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namespace statechart
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{
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namespace detail
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{
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// This helper is necessary because there doesn't seem to be consensus among
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// compilers on how a friend declaration for a function in another namespace
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// has to look like.
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class delete_helper
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{
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public:
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template< class T >
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static void delete_object( const T * pObject )
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{
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delete pObject;
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}
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};
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} // namespace detail
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//////////////////////////////////////////////////////////////////////////////
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class event_base : public detail::rtti_policy::rtti_base_type<
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detail::counted_base<> >
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{
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typedef detail::rtti_policy::rtti_base_type<
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detail::counted_base<> > base_type;
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public:
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//////////////////////////////////////////////////////////////////////////
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intrusive_ptr< const event_base > intrusive_from_this() const;
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protected:
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//////////////////////////////////////////////////////////////////////////
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event_base( detail::rtti_policy::id_provider_type idProvider ) :
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base_type( idProvider )
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{
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}
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virtual ~event_base() {}
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private:
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//////////////////////////////////////////////////////////////////////////
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virtual intrusive_ptr< const event_base > clone() const = 0;
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friend class detail::delete_helper;
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};
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#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
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} // namespace statechart
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#endif
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inline void intrusive_ptr_add_ref( const ::boost::statechart::event_base * pBase )
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{
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pBase->add_ref();
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}
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inline void intrusive_ptr_release( const ::boost::statechart::event_base * pBase )
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{
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if ( pBase->release() )
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{
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::boost::statechart::detail::delete_helper::delete_object( pBase );
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}
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}
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#ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
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} // namespace statechart
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#endif
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namespace statechart
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{
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// We're implementing this here so that GCC3.4.2 can find
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// intrusive_ptr_add_ref, which is indirectly called from the intrusive_ptr
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// ctor.
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inline intrusive_ptr< const event_base > event_base::intrusive_from_this() const
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{
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if ( base_type::ref_counted() )
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{
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return intrusive_ptr< const event_base >( this );
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}
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else
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{
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return clone();
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}
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}
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} // namespace statechart
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} // namespace boost
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#endif
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