ACE/ace/Notification_Strategy.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file   Notification_Strategy.h
   6  *
   7  *  @author Doug Schmidt
   8  */
   9 //=============================================================================
  10 #ifndef ACE_NOTIFICATION_STRATEGY_H
  11 #define ACE_NOTIFICATION_STRATEGY_H
  12 #include /**/ "ace/pre.h"
  13
  14 #include "ace/Event_Handler.h"
  15
  16 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  17 # pragma once
  18 #endif /* ACE_LACKS_PRAGMA_ONCE */
  19
  20 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  21
  22 // Forward decls.
  23 class ACE_Reactor;
  24
  25 /**
  26  * @class ACE_Notification_Strategy
  27  *
  28  * @brief Abstract class used for notifying an interested party
  29  *
  30  * A vehicle for extending the behavior of ACE_Message_Queue wrt
  31  * notification *without subclassing*.  Thus, it's an example of
  32  * the Bridge/Strategy patterns.
  33  */
  34 class ACE_Export ACE_Notification_Strategy
  35 {
  36 public:
  37   /// Constructor.
  38   ACE_Notification_Strategy (ACE_Event_Handler *eh, ACE_Reactor_Mask mask);
  39
  40   /// Destructor.
  41   virtual ~ACE_Notification_Strategy () = default;
  42
  43   virtual int notify () = 0;
  44   virtual int notify (ACE_Event_Handler *, ACE_Reactor_Mask mask) = 0;
  45
  46   /// Get the event handler.
  47   ACE_Event_Handler *event_handler ();
  48
  49   /// Set the event handler.
  50   void event_handler (ACE_Event_Handler *eh);
  51
  52   /// Get the reactor mask.
  53   ACE_Reactor_Mask mask () const;
  54
  55   /// Set the reactor mask.
  56   void mask (ACE_Reactor_Mask m);
  57
  58 protected:
  59   /// The event handler.
  60   ACE_Event_Handler *eh_;
  61
  62   /// The reactor mask.
  63   ACE_Reactor_Mask mask_;
  64 };
  65
  66 ACE_END_VERSIONED_NAMESPACE_DECL
  67
  68 #if defined (__ACE_INLINE__)
  69 #include "ace/Notification_Strategy.inl"
  70 #endif /* __ACE_INLINE __ */
  71
  72 #include /**/ "ace/post.h"
  73 #endif /*ACE_NOTIFICATION_STRATEGY_H */