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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-06-08 22:22:46 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2016-06-22 14:44:56 +0200 |
commit | 9bfad8cd519f17cbb26a672868169fcd304d5bd5 (patch) | |
tree | 3a07add3fb0cdf47fe4d5c9432ad931429c05d65 /cpukit/score/include/rtems/score/schedulersimplesmp.h | |
parent | score: Move _RBTree_Find() (diff) | |
download | rtems-9bfad8cd519f17cbb26a672868169fcd304d5bd5.tar.bz2 |
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counter ensures that the scheduler discards out-of-date priorities.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.
Diffstat (limited to 'cpukit/score/include/rtems/score/schedulersimplesmp.h')
-rw-r--r-- | cpukit/score/include/rtems/score/schedulersimplesmp.h | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/cpukit/score/include/rtems/score/schedulersimplesmp.h b/cpukit/score/include/rtems/score/schedulersimplesmp.h index 31c837d00d..0a05546c46 100644 --- a/cpukit/score/include/rtems/score/schedulersimplesmp.h +++ b/cpukit/score/include/rtems/score/schedulersimplesmp.h @@ -66,13 +66,12 @@ typedef struct { _Scheduler_simple_SMP_Yield, \ _Scheduler_simple_SMP_Block, \ _Scheduler_simple_SMP_Unblock, \ - _Scheduler_simple_SMP_Change_priority, \ + _Scheduler_simple_SMP_Update_priority, \ _Scheduler_default_Map_priority, \ _Scheduler_default_Unmap_priority, \ _Scheduler_simple_SMP_Ask_for_help, \ _Scheduler_simple_SMP_Node_initialize, \ _Scheduler_default_Node_destroy, \ - _Scheduler_simple_SMP_Update_priority, \ _Scheduler_default_Release_job, \ _Scheduler_default_Tick, \ _Scheduler_SMP_Start_idle \ @@ -83,7 +82,8 @@ void _Scheduler_simple_SMP_Initialize( const Scheduler_Control *scheduler ); void _Scheduler_simple_SMP_Node_initialize( const Scheduler_Control *scheduler, - Thread_Control *the_thread + Thread_Control *the_thread, + Priority_Control priority ); void _Scheduler_simple_SMP_Block( @@ -96,11 +96,9 @@ Thread_Control *_Scheduler_simple_SMP_Unblock( Thread_Control *thread ); -Thread_Control *_Scheduler_simple_SMP_Change_priority( +Thread_Control *_Scheduler_simple_SMP_Update_priority( const Scheduler_Control *scheduler, - Thread_Control *the_thread, - Priority_Control new_priority, - bool prepend_it + Thread_Control *the_thread ); Thread_Control *_Scheduler_simple_SMP_Ask_for_help( @@ -109,12 +107,6 @@ Thread_Control *_Scheduler_simple_SMP_Ask_for_help( Thread_Control *needs_help ); -void _Scheduler_simple_SMP_Update_priority( - const Scheduler_Control *scheduler, - Thread_Control *thread, - Priority_Control new_priority -); - Thread_Control *_Scheduler_simple_SMP_Yield( const Scheduler_Control *scheduler, Thread_Control *thread |