Symaptic: os/ossrv/ossrv_pub/boost_apis/boost/statechart/event

     1 #ifndef BOOST_STATECHART_EVENT_BASE_HPP_INCLUDED

     2 #define BOOST_STATECHART_EVENT_BASE_HPP_INCLUDED

     3 //////////////////////////////////////////////////////////////////////////////

     4 // Copyright 2002-2006 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 //////////////////////////////////////////////////////////////////////////////

    11 #include <boost/statechart/detail/rtti_policy.hpp>

    12 #include <boost/statechart/detail/counted_base.hpp>

    14 #include <boost/assert.hpp>

    15 #include <boost/intrusive_ptr.hpp>

    16 #include <boost/config.hpp>

    20 namespace boost

    21 {

    22 namespace statechart

    23 {

    24 namespace detail

    25 {

    29 // This helper is necessary because there doesn't seem to be consensus among

    30 // compilers on how a friend declaration for a function in another namespace

    31 // has to look like.

    32 class delete_helper

    33 {

    34   public:

    35     template< class T >

    36     static void delete_object( const T * pObject )

    37     {

    38       delete pObject;

    39     }

    40 };

    44 } // namespace detail

    48 //////////////////////////////////////////////////////////////////////////////

    49 class event_base : public detail::rtti_policy::rtti_base_type<

    50   detail::counted_base<> >

    51 {

    52   typedef detail::rtti_policy::rtti_base_type<

    53     detail::counted_base<> > base_type;

    54   public:

    55     //////////////////////////////////////////////////////////////////////////

    56     intrusive_ptr< const event_base > intrusive_from_this() const;

    58   protected:

    59     //////////////////////////////////////////////////////////////////////////

    60     event_base( detail::rtti_policy::id_provider_type idProvider ) :

    61       base_type( idProvider )

    62     {

    63     }

    65     virtual ~event_base() {}

    67   private:

    68     //////////////////////////////////////////////////////////////////////////

    69     virtual intrusive_ptr< const event_base > clone() const = 0;

    71     friend class detail::delete_helper;

    72 };

    76 #ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP

    77 } // namespace statechart

    78 #endif

    82 inline void intrusive_ptr_add_ref( const ::boost::statechart::event_base * pBase )

    83 {

    84   pBase->add_ref();

    85 }

    87 inline void intrusive_ptr_release( const ::boost::statechart::event_base * pBase )

    88 {

    89   if ( pBase->release() )

    90   {

    91     ::boost::statechart::detail::delete_helper::delete_object( pBase );

    92   }

    93 }

    97 #ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP

    98 } // namespace statechart

    99 #endif

   100 namespace statechart

   101 {

   105 // We're implementing this here so that GCC3.4.2 can find

   106 // intrusive_ptr_add_ref, which is indirectly called from the intrusive_ptr

   107 // ctor.

   108 inline intrusive_ptr< const event_base > event_base::intrusive_from_this() const

   109 {

   110   if ( base_type::ref_counted() )

   111   {

   112     return intrusive_ptr< const event_base >( this );

   113   }

   114   else

   115   {

   116     return clone();

   117   }

   118 }

   122 } // namespace statechart

   123 } // namespace boost

   127 #endif

author	sl
	Tue, 10 Jun 2014 14:32:02 +0200
changeset 1	260cb5ec6c19
permissions	-rw-r--r--