1 files changed, 63 insertions, 0 deletions
diff --git a/cpukit/score/src/threadqrequeue.c b/cpukit/score/src/threadqrequeue.c
new file mode 100644
index 0000000000..96434639ef
--- /dev/null
+++ b/cpukit/score/src/threadqrequeue.c
@@ -0,0 +1,63 @@
+/*
+ *  Thread Queue Handler
+ *
+ *
+ *  COPYRIGHT (c) 1989-2006.
+ *  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.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/chain.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/object.h>
+#include <rtems/score/states.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+#include <rtems/score/tqdata.h>
+
+/*PAGE
+ *
+ *  _Thread_queue_Requeue
+ *
+ *  This routine is invoked when a thread changes priority and should be
+ *  moved to a different position on the thread queue.
+ *
+ *  Input parameters:
+ *    the_thread_queue - pointer to a threadq header
+ *    the_thread       - pointer to a thread control block
+ *
+ *  Output parameters: NONE
+ *
+ *  INTERRUPT LATENCY: NONE
+ */
+
+void _Thread_queue_Requeue(
+  Thread_queue_Control *the_thread_queue,
+  Thread_Control       *the_thread
+)
+{
+  /* just in case the thread really wasn't blocked here */
+  if ( !the_thread_queue )
+    return;
+
+  switch ( the_thread_queue->discipline ) {
+    case THREAD_QUEUE_DISCIPLINE_FIFO:
+      /* queueing by FIFO -- nothing to do */
+      break;
+    case THREAD_QUEUE_DISCIPLINE_PRIORITY: {
+      Thread_queue_Control *tq = the_thread_queue;
+
+      _Thread_queue_Enter_critical_section( tq );
+        _Thread_queue_Extract_priority_helper( tq, the_thread, TRUE );
+        _Thread_queue_Enqueue_priority( tq, the_thread );
+      }
+      break;
+   }
+}
+