eventsource.h
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1 /*
2  * Copyright (C) 2006-2007 Laurentiu-Gheorghe Crisan
3  * Copyright (C) 2006-2008 Marc Boris Duerner
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
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11  * software library without restriction. Specifically, if other files
12  * instantiate templates or use macros or inline functions from this
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14  * produce an executable, this file does not by itself cause the
15  * resulting executable to be covered by the GNU General Public
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18  * General Public License.
19  *
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21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23  * Lesser General Public License for more details.
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28  */
29 #ifndef CXXTOOLS_EVENTSOURCE_H
30 #define CXXTOOLS_EVENTSOURCE_H
31 
32 #include <cxxtools/event.h>
33 #include <cxxtools/signal.h>
34 #include <cxxtools/mutex.h>
35 #include <cxxtools/eventsink.h>
36 #include <map>
37 #include <typeinfo>
38 
39 namespace cxxtools {
40 
41 class EventSink;
42 
52 class EventSource : protected NonCopyable
53 {
54  friend class EventSink;
55 
56  public:
57  EventSource();
58 
59  ~EventSource();
60 
61  void send(const cxxtools::Event& ev);
62 
63  void connect(EventSink& sink);
64 
65  void disconnect(EventSink& sink);
66 
67  template <typename EventT>
68  void subscribe(EventSink& sink)
69  {
70  subscribe( sink, typeid(EventT) );
71  }
72 
73  template <typename EventT>
74  void unsubscribe(EventSink& sink)
75  {
76  unsubscribe( sink, typeid(EventT) );
77  }
78 
79  private:
80  bool tryDisconnect(EventSink& sink);
81 
82  void subscribe(EventSink& sink, const std::type_info& ti);
83 
84  void unsubscribe(EventSink& sink, const std::type_info& ti);
85 
86  private:
87  struct Sentry;
88 
89  typedef std::multimap< const std::type_info*,
90  EventSink*,
91  CompareEventTypeInfo > SinkMap;
92 
93  mutable RecursiveMutex _mutex;
94  mutable RecursiveMutex* _dmutex;
95  mutable SinkMap _sinks;
96  mutable Sentry* _sentry;
97  mutable bool _dirty;
98 };
99 
100 } // namespace cxxtools
101 
102 #endif
103