score: Introduce map priority scheduler operation

Introduce map/unmap priority scheduler operations to map thread priority
values from/to the user domain to/from the scheduler domain.  Use the
map priority operation to validate the thread priority.  The EDF
schedulers use this new operation to distinguish between normal
priorities and priorities obtain through a job release.

Update #2173.
Update #2556.

1 files changed, 8 insertions, 4 deletions

diff --git a/cpukit/posix/src/mutexgetprioceiling.c b/cpukit/posix/src/mutexgetprioceiling.c
index eda02cba83..dfff98f9b7 100644
--- a/cpukit/posix/src/mutexgetprioceiling.c
+++ b/cpukit/posix/src/mutexgetprioceiling.c
@@ -45,10 +45,14 @@ int pthread_mutex_getprioceiling(
 
   _POSIX_Mutex_Acquire_critical( the_mutex, &queue_context );
 
-  *prioceiling = _POSIX_Priority_From_core(
-    &_Scheduler_Table[ 0 ],
-    the_mutex->Mutex.priority_ceiling
-  );
+  if ( the_mutex->protocol == POSIX_MUTEX_PRIORITY_CEILING ) {
+    *prioceiling = _POSIX_Priority_From_core(
+      _CORE_ceiling_mutex_Get_scheduler( &the_mutex->Mutex ),
+      _CORE_ceiling_mutex_Get_priority( &the_mutex->Mutex )
+    );
+  } else {
+    *prioceiling = 0;
+  }
 
   _POSIX_Mutex_Release( the_mutex, &queue_context );