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diff --git a/ace/Active_Map_Manager.h b/ace/Active_Map_Manager.h
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+/* -*- C++ -*- */
+// $Id$
+
+// ============================================================================
+//
+// = LIBRARY
+//    ace
+//
+// = FILENAME
+//    Active_Map_Manager.h
+//
+// = AUTHOR
+//    Irfan Pyarali
+//
+// ============================================================================
+
+#ifndef ACE_ACTIVE_MAP_MANAGER_H
+#define ACE_ACTIVE_MAP_MANAGER_H
+
+#include "ace/OS.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+class ACE_Export ACE_Active_Map_Manager_Key 
+{
+  // = TITLE
+  //     Key used in the Active Object Map.
+  //
+  // = DESCRIPTION
+  //     This key keeps information of the index and the generation
+  //     count of the slot it represents.  Since the index information
+  //     is part of the key, lookups are super fast and predictable,
+public:
+  ACE_Active_Map_Manager_Key (void);
+  // Default constructor.
+
+  ACE_Active_Map_Manager_Key (u_long index,
+                              u_long generation);
+  // Constructor given the index and generation number.  This is
+  // useful once the user has somehow recovered the index and
+  // generation number from the client.
+
+  u_long index (void) const;
+  // Get the index.
+  
+  u_long generation (void) const;
+  // Get the generation number.
+  
+  // = These really should be protected but because of template
+  // friends, they are not.
+
+  void index (u_long i);
+  // Set the index.
+  
+  void generation (u_long g);
+  // Set the generation number.
+
+  void increment_generation_count (void);
+  // Increment the generation number.
+
+private:
+  u_long index_;
+  // Index in the active map.
+
+  u_long generation_;
+  // Generation number of <index_> slot in the active map.
+};
+
+// Include the templates here.
+#include "ace/Active_Map_Manager_T.h"
+
+#if defined (__ACE_INLINE__)
+#include "ace/Active_Map_Manager.i"
+#endif /* __ACE_INLINE__ */
+
+#endif /* ACE_ACTIVE_MAP_MANAGER_H */