src/apps/mediaplayer/support/EventQueue.h

   1 /*
   2  * Copyright (c) 2000-2008, Ingo Weinhold <ingo_weinhold@gmx.de>,
   3  * Copyright (c) 2000-2008, Stephan Aßmus <superstippi@gmx.de>,
   4  * All Rights Reserved. Distributed under the terms of the MIT license.
   5  */
   6 #ifndef EVENT_QUEUE_H
   7 #define EVENT_QUEUE_H
   8
   9
  10 #include <List.h>
  11 #include <Locker.h>
  12 #include <OS.h>
  13
  14
  15 class Event;
  16
  17
  18 class EventQueue : public BLocker {
  19  public:
  20                                                                 EventQueue();
  21         virtual                                         ~EventQueue();
  22
  23                         status_t                        InitCheck();
  24
  25         static  EventQueue*                     CreateDefault();
  26         static  void                            DeleteDefault();
  27         static  EventQueue&                     Default();
  28
  29                         void                            AddEvent(Event* event);
  30                         bool                            RemoveEvent(Event* event);
  31                         void                            ChangeEvent(Event* event,
  32                                                                         bigtime_t newTime);
  33
  34  private:
  35                         void                            _AddEvent(Event* event);
  36                         Event*                          _EventAt(int32 index) const;
  37
  38         static  int32                           _execute_events_(void *cookie);
  39                         int32                           _ExecuteEvents();
  40                         void                            _Reschedule();
  41
  42                         BList                           fEvents;
  43                         thread_id                       fEventExecutor;
  44                         sem_id                          fThreadControl;
  45         volatile bigtime_t                      fNextEventTime;
  46                         status_t                        fStatus;
  47         static  EventQueue*                     fDefaultQueue;
  48 };
  49
  50 #endif  // EVENT_QUEUE_H