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diff --git a/c/src/exec/score/inline/userext.inl b/c/src/exec/score/inline/userext.inl
new file mode 100644
index 0000000000..4f3e0fd42a
--- /dev/null
+++ b/c/src/exec/score/inline/userext.inl
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+/*  userext.inl
+ *
+ *  This file contains the macro implementation of the inlined routines
+ *  from the User Extension Handler
+ *
+ *  COPYRIGHT (c) 1989-1997.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may in
+ *  the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#ifndef __USER_EXTENSIONS_inl
+#define __USER_EXTENSIONS_inl
+
+/*PAGE
+ *
+ *  _User_extensions_Handler_initialization
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine performs the initialization necessary for this handler.
+ */
+
+RTEMS_INLINE_ROUTINE void _User_extensions_Handler_initialization (
+    User_extensions_Table  *initial_extensions
+)
+{
+  _Chain_Initialize_empty( &_User_extensions_List );
+
+  if ( initial_extensions ) {
+    _User_extensions_Initial.Callouts = *initial_extensions;
+    _Chain_Append( &_User_extensions_List, &_User_extensions_Initial.Node );
+  }
+}
+
+/*PAGE
+ *
+ *  _User_extensions_Add_set
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine is used to add a user extension set to the active list.
+ */
+
+RTEMS_INLINE_ROUTINE void _User_extensions_Add_set (
+  User_extensions_Control *the_extension,
+  User_extensions_Table   *extension_table
+)
+{
+  the_extension->Callouts = *extension_table;
+
+  _Chain_Append( &_User_extensions_List, &the_extension->Node );
+}
+
+/*PAGE
+ *
+ *  _User_extensions_Add_API_set
+ *  DESCRIPTION:
+ *
+ *  This routine is used to add an API extension set to the active list.
+ */
+ 
+RTEMS_INLINE_ROUTINE void _User_extensions_Add_API_set (
+  User_extensions_Control *the_extension
+)
+{
+  _Chain_Prepend( &_User_extensions_List, &the_extension->Node );
+}
+ 
+/*PAGE
+ *
+ *  _User_extensions_Remove_set
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine is used to remove a user extension set from the active list.
+ */
+
+RTEMS_INLINE_ROUTINE void _User_extensions_Remove_set (
+  User_extensions_Control  *the_extension
+)
+{
+  _Chain_Extract( &the_extension->Node );
+}
+
+/*PAGE
+ *
+ *  _User_extensions_Thread_switch
+ *
+ *  DESCRIPTION:
+ *
+ *  This routine is used to invoke the user extension which
+ *  is invoked when a context switch occurs.
+ */
+
+RTEMS_INLINE_ROUTINE void _User_extensions_Thread_switch (
+  Thread_Control *executing,
+  Thread_Control *heir
+)
+{
+  Chain_Node              *the_node;
+  User_extensions_Control *the_extension;
+
+  for ( the_node = _User_extensions_List.first ;
+        !_Chain_Is_tail( &_User_extensions_List, the_node ) ;
+        the_node = the_node->next ) {
+
+    the_extension = (User_extensions_Control *) the_node;
+
+    if ( the_extension->Callouts.thread_switch != NULL )
+      (*the_extension->Callouts.thread_switch)( executing, heir );
+  }
+}
+
+#endif
+/* end of include file */