1 files changed, 39 insertions, 0 deletions
diff --git a/cpukit/score/src/userextthreadswitch.c b/cpukit/score/src/userextthreadswitch.c
new file mode 100644
index 0000000000..2a88c9f4f9
--- /dev/null
+++ b/cpukit/score/src/userextthreadswitch.c
@@ -0,0 +1,39 @@
+/*
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/system.h>
+#include <rtems/score/userext.h>
+
+/**
+ *  This routine is used to invoke the user extension which
+ *  is invoked when a context switch occurs.
+ */
+void _User_extensions_Thread_switch (
+  Thread_Control *executing,
+  Thread_Control *heir
+)
+{
+  Chain_Node                     *the_node;
+  User_extensions_Switch_control *the_extension_switch;
+  
+  for ( the_node = _User_extensions_Switches_list.first ;
+        !_Chain_Is_tail( &_User_extensions_Switches_list, the_node ) ;
+        the_node = the_node->next ) {
+
+    the_extension_switch = (User_extensions_Switch_control *) the_node;
+
+    (*the_extension_switch->thread_switch)( executing, heir );
+  }
+}