diff options
Diffstat (limited to '')
| -rw-r--r-- | cpukit/score/src/scheduleredfchangepriority.c | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/cpukit/score/src/scheduleredfchangepriority.c b/cpukit/score/src/scheduleredfchangepriority.c index a0f5ec7061..9a73128e4c 100644 --- a/cpukit/score/src/scheduleredfchangepriority.c +++ b/cpukit/score/src/scheduleredfchangepriority.c @@ -36,31 +36,42 @@ Priority_Control _Scheduler_EDF_Unmap_priority( return priority & ~SCHEDULER_EDF_PRIO_MSB; } -Scheduler_Void_or_thread _Scheduler_EDF_Change_priority( +Scheduler_Void_or_thread _Scheduler_EDF_Update_priority( const Scheduler_Control *scheduler, - Thread_Control *the_thread, - Priority_Control new_priority, - bool prepend_it + Thread_Control *the_thread ) { Scheduler_EDF_Context *context; Scheduler_EDF_Node *node; + Priority_Control priority; + bool prepend_it; + + if ( !_Thread_Is_ready( the_thread ) ) { + /* Nothing to do */ + SCHEDULER_RETURN_VOID_OR_NULL; + } - context = _Scheduler_EDF_Get_context( scheduler ); node = _Scheduler_EDF_Thread_get_node( the_thread ); + priority = _Scheduler_Node_get_priority( &node->Base, &prepend_it ); - if ( ( new_priority & SCHEDULER_EDF_PRIO_MSB ) != 0 ) { - node->background_priority = new_priority; + if ( priority == node->current_priority ) { + /* Nothing to do */ + SCHEDULER_RETURN_VOID_OR_NULL; } - node->current_priority = new_priority; + if ( ( priority & SCHEDULER_EDF_PRIO_MSB ) != 0 ) { + node->background_priority = priority; + } + + node->current_priority = priority; + context = _Scheduler_EDF_Get_context( scheduler ); _Scheduler_EDF_Extract( context, node ); if ( prepend_it ) { - _Scheduler_EDF_Enqueue_first( context, node, new_priority ); + _Scheduler_EDF_Enqueue_first( context, node, priority ); } else { - _Scheduler_EDF_Enqueue( context, node, new_priority ); + _Scheduler_EDF_Enqueue( context, node, priority ); } _Scheduler_EDF_Schedule_body( scheduler, the_thread, false ); |