ACE/examples/Smart_Pointers/Gadget_Part.h

   1 /* -*- C++ -*- */
   2 //=============================================================================
   3 /**
   4  *  @file    Gadget_Part.h
   5  *
   6  *  @author Christopher Kohlhoff <chris@kohlhoff.com>
   7  */
   8 //=============================================================================
   9
  10 #ifndef GADGET_PART_H
  11 #define GADGET_PART_H
  12
  13 #include "ace/Bound_Ptr.h"
  14 #include "ace/Synch_Traits.h"
  15 #include "ace/Thread_Mutex.h"
  16
  17 /**
  18  * @class Gadget_Part
  19  *
  20  * @brief An interface for some high-level application object.
  21  */
  22 class Gadget_Part
  23 {
  24 public:
  25   /// Destructor.
  26   virtual ~Gadget_Part ();
  27
  28   /// Ask the part to print information about itself.
  29   virtual void print_info () = 0;
  30
  31   /// Ask the part to remove itself from the gadget that contains it.
  32   virtual void remove_from_owner () = 0;
  33 };
  34
  35 // The Gadget_Part_var smart pointer has shared (reference counted) ownership
  36 // semantics.
  37 typedef ACE_Strong_Bound_Ptr<Gadget_Part, ACE_SYNCH_MUTEX> Gadget_Part_var;
  38
  39 // The Gadget_Part_ptr smart pointer has no ownership semantics, but supports
  40 // conversion back into a Gadget_var.
  41 typedef ACE_Weak_Bound_Ptr<Gadget_Part, ACE_SYNCH_MUTEX> Gadget_Part_ptr;
  42
  43 #endif /* GADGET_PART_H */