1 files changed, 113 insertions, 0 deletions
diff --git a/cpukit/score/src/apiext.c b/cpukit/score/src/apiext.c
new file mode 100644
index 0000000000..a08977113e
--- /dev/null
+++ b/cpukit/score/src/apiext.c
@@ -0,0 +1,113 @@
+/*  apiext.c
+ *
+ *  XXX
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  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/apiext.h>
+
+/*PAGE
+ *
+ *  _API_extensions_Initialization
+ */
+
+void _API_extensions_Initialization( void )
+{
+ _Chain_Initialize_empty( &_API_extensions_List );
+}
+
+/*PAGE
+ *
+ *  _API_extensions_Add
+ */
+
+void _API_extensions_Add(
+  API_extensions_Control *the_extension
+)
+{
+  _Chain_Append( &_API_extensions_List, &the_extension->Node );
+}
+
+#if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API)
+  /*PAGE
+   *
+   *  _API_extensions_Run_predriver
+   */
+
+  void _API_extensions_Run_predriver( void )
+  {
+    Chain_Node             *the_node;
+    API_extensions_Control *the_extension;
+
+    for ( the_node = _Chain_First( &_API_extensions_List );
+	  !_Chain_Is_tail( &_API_extensions_List, the_node ) ;
+	  the_node = the_node->next ) {
+
+      the_extension = (API_extensions_Control *) the_node;
+
+      if ( the_extension->predriver_hook )
+	(*the_extension->predriver_hook)();
+    }
+  }
+#endif
+
+/*PAGE
+ *
+ *  _API_extensions_Run_postdriver
+ */
+
+void _API_extensions_Run_postdriver( void )
+{
+  Chain_Node             *the_node;
+  API_extensions_Control *the_extension;
+
+  for ( the_node = _Chain_First( &_API_extensions_List );
+        !_Chain_Is_tail( &_API_extensions_List, the_node ) ;
+        the_node = the_node->next ) {
+
+    the_extension = (API_extensions_Control *) the_node;
+
+    /*
+     *  Currently all APIs configure this hook so it is always non-NULL.
+     */
+#if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API)
+    if ( the_extension->postdriver_hook )
+#endif
+      (*the_extension->postdriver_hook)();
+  }
+}
+
+/*PAGE
+ *
+ *  _API_extensions_Run_postswitch
+ */
+
+void _API_extensions_Run_postswitch( void )
+{
+  Chain_Node             *the_node;
+  API_extensions_Control *the_extension;
+
+  for ( the_node = _Chain_First( &_API_extensions_List );
+        !_Chain_Is_tail( &_API_extensions_List, the_node ) ;
+        the_node = the_node->next ) {
+
+    the_extension = (API_extensions_Control *) the_node;
+
+    (*the_extension->postswitch_hook)( _Thread_Executing );
+  }
+}
+
+/* end of file */