2 // Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
3 // Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
4 // Stefan Bund <g0dil@berlios.de>
6 // This program is free software; you can redistribute it and/or modify
7 // it under the terms of the GNU General Public License as published by
8 // the Free Software Foundation; either version 2 of the License, or
9 // (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the
18 // Free Software Foundation, Inc.,
19 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 \brief Events public header */
29 #include "Scheduler/ClockService.hh"
32 //#include "Events.mpp"
33 ///////////////////////////////hh.p////////////////////////////////////////
38 // Implementation: The concrete EventDescriptor implementation will need to set things up so
39 // some callback (within the EventDescriptor implementation) will be called when the event
40 // happens. This setup happens in 'v_enable()'. This internal handler sets up an EventType
41 // instance if needed and calls 'callback()'.
43 // 'callback()' will access the EventBinding wrapper to find the user-callback to signal. It
44 // will do any needed internal processing, call that user callback and clean up afterwards.
46 /** \brief Generic event interface base-class
48 The EventDescriptor base-class provides an interface to control events.
53 virtual ~EventDescriptor();
55 bool enabled(); ///< Check, whether the event is currently enabled
56 void enabled(bool v); ///< Enable or disable the event
62 virtual void v_enable() = 0; ///< Called to enable the event delivery
63 virtual void v_disable() = 0; ///< Called to disable the event delivery
65 virtual bool v_isRegistered() = 0;
67 void notifyThrottle();
68 void notifyUnthrottle();
70 void registerRoute(ForwardingRoute & route);
74 typedef std::vector<ForwardingRoute*> Routes;
77 friend class ForwardingRoute;
80 /** \brief Internal: Callback forwarders
82 template <class EventType, class Self>
83 class EventImplementationHelper
86 typedef typename detail::EventArgType<EventType>::type EventArg;
88 void callback(EventArg event, ClockService::clock_type time);
89 ///< Forward event to user callback
90 /**< \param[in] event Event argument to pass to the user
92 \param[in] time Expected time of the event */
93 void callback(EventArg event); ///< Forward event to user callback
94 /**< \param[in] event Event argument to pass to the user
98 detail::EventBinding<EventType> & binding();
103 template <class Self>
104 class EventImplementationHelper<void,Self>
107 void callback(ClockService::clock_type time);
111 detail::EventBinding<void> & binding();
116 /** \brief Event implementation base class
118 EventImplementation provides the base-class for all Event implementations.
120 class SomeEvent : public EventImplementation<SomeEventArg>
126 virtual void v_enable() {
127 // register cb() to be called when the event occurs
130 virtual void v_disable() {
135 // Build event argument
136 SomeEventArg arg (...);
137 // Call the event callback
143 Every event needs to implement v_enable() and v_disable(). v_enable() should register some
144 member (in the example \c cb() ) to be called whenever the event occurs, while v_disable()
145 should unregister it.
147 The \a EventType argument to EventImplementation defines the type of argument passed to the
148 user callback. It defaults to \c void. . This user callback is called from within the
149 registered member (e.g. \c cb() ) by calling the inherited callback() member. This member
150 takes an \a EventType reference as argument which will be forwarded to the user callback. If
151 available, you should also provide the \e expected event time as a second argument.
153 template <class EventType>
154 class EventImplementation
155 : public EventDescriptor,
156 public EventImplementationHelper< EventType, EventImplementation<EventType> >
159 typedef EventType Event;
160 typedef typename detail::EventArgType<EventType>::type EventArg;
162 module::Module & module() const; ///< Module in which the event is registered
163 EventManager & manager() const; ///< EventManager of the event
166 EventImplementation();
169 virtual bool v_isRegistered();
170 void setBinding(detail::EventBinding<Event> & binding);
172 detail::EventBinding<Event> * binding_;
174 friend class EventManager;
175 friend class EventImplementationHelper< EventType, EventImplementation<EventType> >;
180 ///////////////////////////////hh.e////////////////////////////////////////
181 #include "Events.cci"
182 //#include "Events.ct"
183 #include "Events.cti"
190 // c-file-style: "senf"
191 // indent-tabs-mode: nil
192 // ispell-local-dictionary: "american"
193 // compile-command: "scons -u test"
194 // comment-column: 40