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diff --git a/ace/Singleton.h b/ace/Singleton.h
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+/* -*- C++ -*- */
+// $Id$
+
+
+// ============================================================================
+//
+// = LIBRARY
+//    ace
+// 
+// = FILENAME
+//    Singleton.h
+//
+// = DESCRIPTION
+//
+// = AUTHOR
+//    Tim Harrison (harrison@cs.wustl.edu) and Douglas C. Schmidt
+// 
+// ============================================================================
+
+#if !defined (ACE_SINGLETON_H)
+#define ACE_SINGLETON_H
+
+#include "ace/ACE.h"
+
+template <class TYPE, class LOCK>
+class ACE_Singleton
+  // = TITLE
+  //     A Singleton Adapter.
+  //   
+  // = DESCRIPTION
+  //     Uses the Adapter pattern to turn ordinary classes into
+  //     Singletons optimized with the Double-Check pattern.
+{
+public:
+  static TYPE *instance (void);
+  // Global access point to the Singleton.
+
+  void dump (void) const;
+  // Dump the state of the object.
+
+protected:
+#if !defined (ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES)
+  static TYPE *instance_;
+  // Pointer to the Singleton instance.
+
+  static LOCK ace_singleton_lock_;
+  // Lock the creation of the singleton.  
+#endif /* ACE_LACKS_STATIC_DATA_MEMBER_TEMPLATES */
+};
+
+#if defined (__ACE_INLINE__)
+#include "ace/Singleton.i"
+#endif /* __ACE_INLINE__ */
+
+#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
+#include "ace/Singleton.cpp"
+#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
+
+#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
+#pragma implementation ("Singleton.cpp")
+#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
+
+#endif /* ACE_SINGLETON_H */
+
+