score: Rework _Thread_Change_priority()

Move the writes to Thread_Control::current_priority and
Thread_Control::real_priority into _Thread_Change_priority() under the
protection of the thread lock.  Add a filter function to
_Thread_Change_priority() to enable specialized variants.

Avoid race conditions during a thread priority restore with the new
Thread_Control::priority_restore_hint for an important average case
optimizations used by priority inheritance mutexes.

Update #2273.

1 files changed, 2 insertions, 2 deletions

diff --git a/cpukit/score/src/scheduleredfreleasejob.c b/cpukit/score/src/scheduleredfreleasejob.c
index 6c1b642890..2c3db65b64 100644
--- a/cpukit/score/src/scheduleredfreleasejob.c
+++ b/cpukit/score/src/scheduleredfreleasejob.c
@@ -29,6 +29,7 @@ void _Scheduler_EDF_Release_job(
 )
 {
   Priority_Control new_priority;
+  Priority_Control unused;
 
   (void) scheduler;
 
@@ -42,6 +43,5 @@ void _Scheduler_EDF_Release_job(
     new_priority = the_thread->Start.initial_priority;
   }
 
-  the_thread->real_priority = new_priority;
-  _Thread_Change_priority(the_thread, new_priority, true);
+  _Thread_Set_priority( the_thread, new_priority, &unused, true );
 }