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