1 #ifndef BOOST_STATECHART_EVENT_HPP_INCLUDED
2 #define BOOST_STATECHART_EVENT_HPP_INCLUDED
3 //////////////////////////////////////////////////////////////////////////////
4 // Copyright 2002-2007 Andreas Huber Doenni
5 // Distributed under the Boost Software License, Version 1.0. (See accompany-
6 // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7 //////////////////////////////////////////////////////////////////////////////
8 
9 
10 
11 #include <boost/statechart/event_base.hpp>
12 #include <boost/statechart/detail/rtti_policy.hpp>
13 #include <boost/statechart/detail/memory.hpp>
14 
15 #include <boost/polymorphic_cast.hpp> // boost::polymorphic_downcast
16 
17 #include <memory> // std::allocator
18 
19 
20 
21 namespace boost
22 {
23 namespace statechart
24 {
25 
26 
27 
28 //////////////////////////////////////////////////////////////////////////////
29 template< class MostDerived, class Allocator = std::allocator< void > >
30 class event : public detail::rtti_policy::rtti_derived_type<
31   MostDerived, event_base >
32 {
33   public:
34     //////////////////////////////////////////////////////////////////////////
35     // Compiler-generated copy constructor and copy assignment operator are
36     // fine
37 
operator new(std::size_t size)38     void * operator new( std::size_t size )
39     {
40       return detail::allocate< MostDerived, Allocator >( size );
41     }
42 
operator new(std::size_t,void * p)43     void * operator new( std::size_t, void * p )
44     {
45       return p;
46     }
47 
operator delete(void * pEvent)48     void operator delete( void * pEvent )
49     {
50       detail::deallocate< MostDerived, Allocator >( pEvent );
51     }
52 
operator delete(void * pEvent,void * p)53     void operator delete( void * pEvent, void * p )
54     {
55     }
56 
57   protected:
58     //////////////////////////////////////////////////////////////////////////
event()59     event() {}
~event()60     virtual ~event() {}
61 
62   private:
63     //////////////////////////////////////////////////////////////////////////
clone() const64     virtual intrusive_ptr< const event_base > clone() const
65     {
66       return intrusive_ptr< const event_base >( new MostDerived(
67         *polymorphic_downcast< const MostDerived * >( this ) ) );
68     }
69 };
70 
71 
72 
73 } // namespace statechart
74 } // namespace boost
75 
76 
77 
78 #endif
79