ACE/ace/Active_Map_Manager.h

   1 /* -*- C++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Active_Map_Manager.h
   6  *
   7  *  @author Irfan Pyarali
   8  */
   9 //=============================================================================
  10
  11
  12 #ifndef ACE_ACTIVE_MAP_MANAGER_H
  13 #define ACE_ACTIVE_MAP_MANAGER_H
  14 #include /**/ "ace/pre.h"
  15
  16 #include /**/ "ace/ACE_export.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 # pragma once
  20 #endif /* ACE_LACKS_PRAGMA_ONCE */
  21
  22 #include "ace/Basic_Types.h"
  23
  24 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  25
  26 /**
  27  * @class ACE_Active_Map_Manager_Key
  28  *
  29  * @brief Key used in the Active Object Map.
  30  *
  31  * This key keeps information of the index and the generation
  32  * count of the slot it represents.  Since the index information
  33  * is part of the key, lookups are super fast and predictable,
  34  */
  35 class ACE_Export ACE_Active_Map_Manager_Key
  36 {
  37 public:
  38   /// Default constructor.
  39   ACE_Active_Map_Manager_Key ();
  40
  41   /**
  42    * Constructor given the @a slot_index and @a slot_generation number.
  43    * This is useful once the user has somehow recovered the
  44    * @a slot_index and @a slot_generation number from the client.
  45    */
  46   ACE_Active_Map_Manager_Key (ACE_UINT32 slot_index,
  47                               ACE_UINT32 slot_generation);
  48
  49   /// Get the slot_index.
  50   ACE_UINT32 slot_index () const;
  51
  52   /// Set the slot_index.
  53   void slot_index (ACE_UINT32 i);
  54
  55   /// Get the slot_generation number.
  56   ACE_UINT32 slot_generation () const;
  57
  58   /// Set the slot_generation number.
  59   void slot_generation (ACE_UINT32 g);
  60
  61   /// Size required to store information about active key.
  62   static size_t size ();
  63
  64   /// Recover state of active key from @a data.  User must make sure
  65   /// that @a data encoded using the encode() method.
  66   void decode (const void *data);
  67
  68   /// Encode state of the active key into @a data.  @a data must be as
  69   /// big as the value returned from size().
  70   void encode (void *data) const;
  71
  72   /// Compare keys.
  73   bool operator== (const ACE_Active_Map_Manager_Key &rhs) const;
  74   bool operator!= (const ACE_Active_Map_Manager_Key &rhs) const;
  75
  76   // = This really should be protected but because of template
  77   // friends, they are not.
  78
  79   /// Increment the slot_generation number.
  80   void increment_slot_generation_count ();
  81
  82 private:
  83   /**
  84    * @brief Data for the Active Object Map Key.
  85    *
  86    * This separate structure makes it easier to manage copying
  87    *  the index and the generation to and from the user buffer.
  88    *
  89    */
  90   struct key_data
  91   {
  92     /// Slot index in the active map.
  93     ACE_UINT32 slot_index_;
  94
  95     /// Slot generation number of @c slot_index_ slot in the active map.
  96     ACE_UINT32 slot_generation_;
  97   };
  98
  99   /// Data for the Active Object Map Key.
 100   key_data key_data_;
 101 };
 102
 103 ACE_END_VERSIONED_NAMESPACE_DECL
 104
 105 #if defined (__ACE_INLINE__)
 106 #include "ace/Active_Map_Manager.inl"
 107 #endif /* __ACE_INLINE__ */
 108
 109 // Include the templates here.
 110 #include "ace/Active_Map_Manager_T.h"
 111
 112 #include /**/ "ace/post.h"
 113 #endif /* ACE_ACTIVE_MAP_MANAGER_H */