score: Add thread priority to scheduler nodes

The thread priority is manifest in two independent areas.  One area is
the user visible thread priority along with a potential thread queue.
The other is the scheduler.  Currently, a thread priority update via
_Thread_Change_priority() first updates the user visble thread priority
and the thread queue, then the scheduler is notified if necessary.  The
priority is passed to the scheduler via a local variable.  A generation
counter ensures that the scheduler discards out-of-date priorities.

This use of a local variable ties the update in these two areas close
together.  For later enhancements and the OMIP locking protocol
implementation we need more flexibility.  Add a thread priority
information block to Scheduler_Node and synchronize priority value
updates via a sequence lock on SMP configurations.

Update #2556.

1 files changed, 0 insertions, 38 deletions

diff --git a/cpukit/score/src/scheduleredfupdate.c b/cpukit/score/src/scheduleredfupdate.c
deleted file mode 100644
index 5d475fe5f1..0000000000
--- a/cpukit/score/src/scheduleredfupdate.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/**
- *  @file
- *
- *  @brief Scheduler EDF Update
- *  @ingroup ScoreScheduler
- */
-
-/*
- *  Copyright (C) 2011 Petr Benes.
- *  Copyright (C) 2011 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.org/license/LICENSE.
- */
-
-#if HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <rtems/score/scheduleredfimpl.h>
-
-void _Scheduler_EDF_Update_priority(
-  const Scheduler_Control *scheduler,
-  Thread_Control          *the_thread,
-  Priority_Control         new_priority
-)
-{
-  Scheduler_EDF_Node *node;
-
-  node = _Scheduler_EDF_Thread_get_node( the_thread );
-
-  if ( ( new_priority & SCHEDULER_EDF_PRIO_MSB ) != 0 ) {
-    node->background_priority = new_priority;
-  }
-
-  node->current_priority = new_priority;
-}