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