Chris@16: #ifndef BOOST_STATECHART_EVENT_BASE_HPP_INCLUDED
Chris@16: #define BOOST_STATECHART_EVENT_BASE_HPP_INCLUDED
Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: // Copyright 2002-2006 Andreas Huber Doenni
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompany-
Chris@16: // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #include <boost/statechart/detail/rtti_policy.hpp>
Chris@16: #include <boost/statechart/detail/counted_base.hpp>
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/intrusive_ptr.hpp>
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: namespace statechart
Chris@16: {
Chris@16: namespace detail
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: // This helper is necessary because there doesn't seem to be consensus among
Chris@16: // compilers on how a friend declaration for a function in another namespace
Chris@16: // has to look like.
Chris@16: class delete_helper
Chris@16: {
Chris@16:   public:
Chris@16:     template< class T >
Chris@16:     static void delete_object( const T * pObject )
Chris@16:     {
Chris@16:       delete pObject;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: //////////////////////////////////////////////////////////////////////////////
Chris@16: class event_base : public detail::rtti_policy::rtti_base_type<
Chris@16:   detail::counted_base<> >
Chris@16: {
Chris@16:   typedef detail::rtti_policy::rtti_base_type<
Chris@16:     detail::counted_base<> > base_type;
Chris@16:   public:
Chris@16:     //////////////////////////////////////////////////////////////////////////
Chris@16:     intrusive_ptr< const event_base > intrusive_from_this() const;
Chris@16: 
Chris@16:   protected:
Chris@16:     //////////////////////////////////////////////////////////////////////////
Chris@16:     event_base( detail::rtti_policy::id_provider_type idProvider ) :
Chris@16:       base_type( idProvider )
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     virtual ~event_base() {}
Chris@16: 
Chris@16:   private:
Chris@16:     //////////////////////////////////////////////////////////////////////////
Chris@16:     virtual intrusive_ptr< const event_base > clone() const = 0;
Chris@16: 
Chris@16:     friend class detail::delete_helper;
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
Chris@16: } // namespace statechart
Chris@16: #endif
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: inline void intrusive_ptr_add_ref( const ::boost::statechart::event_base * pBase )
Chris@16: {
Chris@16:   pBase->add_ref();
Chris@16: }
Chris@16: 
Chris@16: inline void intrusive_ptr_release( const ::boost::statechart::event_base * pBase )
Chris@16: {
Chris@16:   if ( pBase->release() )
Chris@16:   {
Chris@16:     ::boost::statechart::detail::delete_helper::delete_object( pBase );
Chris@16:   }
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
Chris@16: } // namespace statechart
Chris@16: #endif
Chris@16: namespace statechart
Chris@16: {
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: // We're implementing this here so that GCC3.4.2 can find
Chris@16: // intrusive_ptr_add_ref, which is indirectly called from the intrusive_ptr
Chris@16: // ctor.
Chris@16: inline intrusive_ptr< const event_base > event_base::intrusive_from_this() const
Chris@16: {
Chris@16:   if ( base_type::ref_counted() )
Chris@16:   {
Chris@16:     return intrusive_ptr< const event_base >( this );
Chris@16:   }
Chris@16:   else
Chris@16:   {
Chris@16:     return clone();
Chris@16:   }
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: } // namespace statechart
Chris@16: } // namespace boost
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #endif