1 files changed, 78 insertions, 0 deletions
diff --git a/c/src/exec/score/src/watchdogtickle.c b/c/src/exec/score/src/watchdogtickle.c
new file mode 100644
index 0000000000..e50c8de43e
--- /dev/null
+++ b/c/src/exec/score/src/watchdogtickle.c
@@ -0,0 +1,78 @@
+/*
+ *  Watchdog Handler
+ *
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/watchdog.h>
+
+/*PAGE
+ *
+ *  _Watchdog_Tickle
+ *
+ *  This routine decrements the delta counter in response to a tick.  The
+ *  delta chain is updated accordingly.
+ *
+ *  Input parameters:
+ *    header - pointer to the delta chain to be tickled
+ *
+ *  Output parameters: NONE
+ */
+
+void _Watchdog_Tickle(
+  Chain_Control *header
+)
+{
+  Watchdog_Control *the_watchdog;
+
+  if ( _Chain_Is_empty( header ) )
+    return;
+
+  the_watchdog = _Watchdog_First( header );
+  the_watchdog->delta_interval--;
+  if ( the_watchdog->delta_interval != 0 )
+    return;
+
+  do {
+     switch( _Watchdog_Remove( the_watchdog ) ) {
+       case WATCHDOG_ACTIVE:
+         (*the_watchdog->routine)(
+           the_watchdog->id,
+           the_watchdog->user_data
+         );
+         break;
+
+       case WATCHDOG_INACTIVE:
+         /*
+          *  This state indicates that the watchdog is not on any chain.
+          *  Thus, it is NOT on a chain being tickled.  This case should 
+          *  never occur.
+          */
+         break;
+
+       case WATCHDOG_BEING_INSERTED:
+         /*
+          *  This state indicates that the watchdog is in the process of
+          *  BEING inserted on the chain.  Thus, it can NOT be on a chain
+          *  being tickled.  This case should never occur.
+          */
+         break;
+
+       case WATCHDOG_REMOVE_IT:
+         break;
+     }
+     the_watchdog = _Watchdog_First( header );
+   } while ( !_Chain_Is_empty( header ) &&
+             (the_watchdog->delta_interval == 0) );
+}