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authorJoel Sherrill <joel.sherrill@OARcorp.com>1999-11-02 21:45:15 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>1999-11-02 21:45:15 +0000
commit82cb78d84c7962d2b55e1f83c9f8cbcbef386d87 (patch)
treebae0b9595689a38992ffcc4bad8ddfea285fc16b /c/src/exec/score/src/watchdogadjust.c
parentSplit Heap and Time of Day Handlers. (diff)
downloadrtems-82cb78d84c7962d2b55e1f83c9f8cbcbef386d87.tar.bz2
Split core message queue and watchdog handler objects into separate files.
Diffstat (limited to 'c/src/exec/score/src/watchdogadjust.c')
-rw-r--r--c/src/exec/score/src/watchdogadjust.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/c/src/exec/score/src/watchdogadjust.c b/c/src/exec/score/src/watchdogadjust.c
new file mode 100644
index 0000000000..83322c11e3
--- /dev/null
+++ b/c/src/exec/score/src/watchdogadjust.c
@@ -0,0 +1,63 @@
+/*
+ * 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_Adjust
+ *
+ * This routine adjusts the delta chain backward or forward in response
+ * to a time change.
+ *
+ * Input parameters:
+ * header - pointer to the delta chain to be adjusted
+ * direction - forward or backward adjustment to delta chain
+ * units - units to adjust
+ *
+ * Output parameters:
+ */
+
+void _Watchdog_Adjust(
+ Chain_Control *header,
+ Watchdog_Adjust_directions direction,
+ Watchdog_Interval units
+)
+{
+ if ( !_Chain_Is_empty( header ) ) {
+ switch ( direction ) {
+ case WATCHDOG_BACKWARD:
+ _Watchdog_First( header )->delta_interval += units;
+ break;
+ case WATCHDOG_FORWARD:
+ while ( units ) {
+ if ( units < _Watchdog_First( header )->delta_interval ) {
+ _Watchdog_First( header )->delta_interval -= units;
+ break;
+ } else {
+ units -= _Watchdog_First( header )->delta_interval;
+ _Watchdog_First( header )->delta_interval = 1;
+ _Watchdog_Tickle( header );
+ if ( _Chain_Is_empty( header ) )
+ break;
+ }
+ }
+ break;
+ }
+ }
+}
+