boost/statechart/event_processor.hpp

   1 #ifndef BOOST_STATECHART_EVENT_PROCESSOR_INCLUDED
   2 #define BOOST_STATECHART_EVENT_PROCESSOR_INCLUDED
   3 //////////////////////////////////////////////////////////////////////////////
   4 // Copyright 2002-2008 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 namespace boost
  12 {
  13 namespace statechart
  14 {
  15
  16
  17
  18 class event_base;
  19
  20
  21
  22 //////////////////////////////////////////////////////////////////////////////
  23 template< class Scheduler >
  24 class event_processor
  25 {
  26   public:
  27     //////////////////////////////////////////////////////////////////////////
  28     virtual ~event_processor() {}
  29
  30     Scheduler & my_scheduler() const
  31     {
  32       return myScheduler_;
  33     }
  34
  35     typedef typename Scheduler::processor_handle processor_handle;
  36
  37     processor_handle my_handle() const
  38     {
  39       return myHandle_;
  40     }
  41
  42     void initiate()
  43     {
  44       initiate_impl();
  45     }
  46
  47     void process_event( const event_base & evt )
  48     {
  49       process_event_impl( evt );
  50     }
  51
  52     void terminate()
  53     {
  54       terminate_impl();
  55     }
  56
  57   protected:
  58     //////////////////////////////////////////////////////////////////////////
  59     typedef const typename Scheduler::processor_context & my_context;
  60
  61     event_processor( my_context ctx ) :
  62       myScheduler_( ctx.my_scheduler() ),
  63       myHandle_( ctx.my_handle() )
  64     {
  65     }
  66
  67   private:
  68     //////////////////////////////////////////////////////////////////////////
  69     virtual void initiate_impl() = 0;
  70     virtual void process_event_impl( const event_base & evt ) = 0;
  71     virtual void terminate_impl() = 0;
  72
  73     // avoids C4512 (assignment operator could not be generated)
  74     event_processor & operator=( const event_processor & );
  75
  76     Scheduler & myScheduler_;
  77     const processor_handle myHandle_;
  78 };
  79
  80
  81
  82 } // namespace statechart
  83 } // namespace boost
  84
  85
  86
  87 #endif