score: Rework thread priority management

Add priority nodes which contribute to the overall thread priority.

The actual priority of a thread is now an aggregation of priority nodes.
The thread priority aggregation for the home scheduler instance of a
thread consists of at least one priority node, which is normally the
real priority of the thread.  The locking protocols (e.g. priority
ceiling and priority inheritance), rate-monotonic period objects and the
POSIX sporadic server add, change and remove priority nodes.

A thread changes its priority now immediately, e.g. priority changes are
not deferred until the thread releases its last resource.

Replace the _Thread_Change_priority() function with

 * _Thread_Priority_perform_actions(),
 * _Thread_Priority_add(),
 * _Thread_Priority_remove(),
 * _Thread_Priority_change(), and
 * _Thread_Priority_update().

Update #2412.
Update #2556.

1 files changed, 1 insertions, 1 deletions

diff --git a/cpukit/posix/src/killinfo.c b/cpukit/posix/src/killinfo.c
index 7cf74eb0bf..6f45b29ec6 100644
--- a/cpukit/posix/src/killinfo.c
+++ b/cpukit/posix/src/killinfo.c
@@ -153,7 +153,7 @@ int _POSIX_signals_Send(
           the_node = the_node->next ) {
       Scheduler_Node *scheduler_node;
 
-      scheduler_node = SCHEDULER_NODE_OF_WAIT_CHAIN_NODE( the_node );
+      scheduler_node = SCHEDULER_NODE_OF_WAIT_PRIORITY_NODE( the_node );
       the_thread = _Scheduler_Node_get_owner( scheduler_node );
       api = the_thread->API_Extensions[ THREAD_API_POSIX ];