score: Simplify SMP processor allocation

Avoid copy and paste and set the scheduler node state in one place.

cpukit/score/include/rtems/score/schedulersmpimpl.h

@@ -313,8 +313,8 @@ typedef void ( *Scheduler_SMP_Enqueue )(
 
 typedef void ( *Scheduler_SMP_Allocate_processor )(
   Scheduler_Context *context,
-  Scheduler_Node    *scheduled,
-  Scheduler_Node    *victim
+  Thread_Control    *scheduled,
+  Thread_Control    *victim
 );
 
 static inline bool _Scheduler_SMP_Insert_priority_lifo_order(
@@ -410,24 +410,17 @@ static inline bool _Scheduler_SMP_Is_processor_owned_by_us(
   return cpu->scheduler_context == context;
 }
 
-static inline void _Scheduler_SMP_Allocate_processor(
+static inline void _Scheduler_SMP_Allocate_processor_lazy(
   Scheduler_Context *context,
-  Scheduler_Node    *scheduled,
-  Scheduler_Node    *victim
+  Thread_Control    *scheduled_thread,
+  Thread_Control    *victim_thread
 )
 {
-  Thread_Control *scheduled_thread = _Scheduler_Node_get_owner( scheduled );
-  Thread_Control *victim_thread = _Scheduler_Node_get_owner( victim );
   Per_CPU_Control *scheduled_cpu = _Thread_Get_CPU( scheduled_thread );
   Per_CPU_Control *victim_cpu = _Thread_Get_CPU( victim_thread );
   Per_CPU_Control *cpu_self = _Per_CPU_Get();
   Thread_Control *heir;
 
-  _Scheduler_SMP_Node_change_state(
-    _Scheduler_SMP_Node_downcast( scheduled ),
-    SCHEDULER_SMP_NODE_SCHEDULED
-  );
-
   _Assert( _ISR_Get_level() != 0 );
 
   if ( _Thread_Is_executing_on_a_processor( scheduled_thread ) ) {
@@ -455,6 +448,24 @@ static inline void _Scheduler_SMP_Allocate_processor(
   }
 }
 
+static inline void _Scheduler_SMP_Allocate_processor(
+  Scheduler_Context                *context,
+  Scheduler_Node                   *scheduled,
+  Scheduler_Node                   *victim,
+  Scheduler_SMP_Allocate_processor  allocate_processor
+)
+{
+  Thread_Control *scheduled_thread = _Scheduler_Node_get_owner( scheduled );
+  Thread_Control *victim_thread = _Scheduler_Node_get_owner( victim );
+
+  _Scheduler_SMP_Node_change_state(
+    _Scheduler_SMP_Node_downcast( scheduled ),
+    SCHEDULER_SMP_NODE_SCHEDULED
+  );
+
+  ( *allocate_processor )( context, scheduled_thread, victim_thread );
+}
+
 static inline Scheduler_Node *_Scheduler_SMP_Get_lowest_scheduled(
   Scheduler_Context *context,
   Scheduler_Node    *filter,
@@ -514,7 +525,14 @@ static inline void _Scheduler_SMP_Enqueue_ordered(
       _Scheduler_SMP_Node_downcast( lowest_scheduled ),
       SCHEDULER_SMP_NODE_READY
     );
-    ( *allocate_processor )( context, node, lowest_scheduled );
+
+    _Scheduler_SMP_Allocate_processor(
+      context,
+      node,
+      lowest_scheduled,
+      allocate_processor
+    );
+
     ( *insert_scheduled )( context, node );
     ( *move_from_scheduled_to_ready )( context, lowest_scheduled );
   } else {
@@ -565,7 +583,14 @@ static inline void _Scheduler_SMP_Enqueue_scheduled_ordered(
       _Scheduler_SMP_Node_downcast( node ),
       SCHEDULER_SMP_NODE_READY
     );
-    ( *allocate_processor) ( context, highest_ready, node );
+
+    _Scheduler_SMP_Allocate_processor(
+      context,
+      highest_ready,
+      node,
+      allocate_processor
+    );
+
     ( *insert_ready )( context, node );
     ( *move_from_ready_to_scheduled )( context, highest_ready );
   }
@@ -588,7 +613,13 @@ static inline void _Scheduler_SMP_Schedule_highest_ready(
 {
   Scheduler_Node *highest_ready = ( *get_highest_ready )( context, victim );
 
-  ( *allocate_processor )( context, highest_ready, victim );
+  _Scheduler_SMP_Allocate_processor(
+    context,
+    highest_ready,
+    victim,
+    allocate_processor
+  );
+
   ( *move_from_ready_to_scheduled )( context, highest_ready );
 }
 

cpukit/score/src/schedulerpriorityaffinitysmp.c

@@ -104,28 +104,22 @@ void _Scheduler_priority_affinity_SMP_Node_initialize(
 }
 
 /*
- * This method is slightly different from _Scheduler_SMP_Allocate_processor()
- * in that it does what it is asked to do. _Scheduler_SMP_Allocate_processor()
- * attempts to prevent migrations but does not take into account affinity
+ * This method is slightly different from
+ * _Scheduler_SMP_Allocate_processor_lazy() in that it does what it is asked to
+ * do. _Scheduler_SMP_Allocate_processor_lazy() attempts to prevent migrations
+ * but does not take into account affinity
  */
 static inline void _Scheduler_SMP_Allocate_processor_exact(
   Scheduler_Context *context,
-   Scheduler_Node    *scheduled,
-   Scheduler_Node    *victim
+  Thread_Control    *scheduled_thread,
+  Thread_Control    *victim_thread
 )
 {
-  Thread_Control  *victim_thread = _Scheduler_Node_get_owner( victim );
-  Thread_Control  *scheduled_thread = _Scheduler_Node_get_owner( scheduled );
   Per_CPU_Control *victim_cpu = _Thread_Get_CPU( victim_thread );
   Per_CPU_Control *cpu_self = _Per_CPU_Get();
 
   (void) context;
 
-  _Scheduler_SMP_Node_change_state(
-    _Scheduler_SMP_Node_downcast( scheduled ),
-    SCHEDULER_SMP_NODE_SCHEDULED
-  );
-
   _Thread_Set_CPU( scheduled_thread, victim_cpu );
   _Thread_Dispatch_update_heir( cpu_self, victim_cpu, scheduled_thread );
 }
@@ -358,10 +352,11 @@ static void _Scheduler_priority_affinity_SMP_Check_for_migrations(
       SCHEDULER_SMP_NODE_READY
     );
 
-    _Scheduler_SMP_Allocate_processor_exact(
+    _Scheduler_SMP_Allocate_processor(
       context,
       highest_ready,
-      lowest_scheduled
+      lowest_scheduled,
+      _Scheduler_SMP_Allocate_processor_exact
     );
 
     _Scheduler_priority_SMP_Move_from_ready_to_scheduled(

cpukit/score/src/schedulerprioritysmp.c

@@ -93,7 +93,7 @@ void _Scheduler_priority_SMP_Block(
     _Scheduler_priority_SMP_Extract_from_ready,
     _Scheduler_priority_SMP_Get_highest_ready,
     _Scheduler_priority_SMP_Move_from_ready_to_scheduled,
-    _Scheduler_SMP_Allocate_processor
+    _Scheduler_SMP_Allocate_processor_lazy
   );
 }
 
@@ -113,7 +113,7 @@ static void _Scheduler_priority_SMP_Enqueue_ordered(
     insert_scheduled,
     _Scheduler_priority_SMP_Move_from_scheduled_to_ready,
     _Scheduler_SMP_Get_lowest_scheduled,
-    _Scheduler_SMP_Allocate_processor
+    _Scheduler_SMP_Allocate_processor_lazy
   );
 }
 
@@ -161,7 +161,7 @@ static void _Scheduler_priority_SMP_Enqueue_scheduled_ordered(
     insert_ready,
     insert_scheduled,
     _Scheduler_priority_SMP_Move_from_ready_to_scheduled,
-    _Scheduler_SMP_Allocate_processor
+    _Scheduler_SMP_Allocate_processor_lazy
   );
 }
 

cpukit/score/src/schedulersimplesmp.c

@@ -175,7 +175,7 @@ void _Scheduler_simple_SMP_Block(
     _Scheduler_simple_SMP_Extract_from_ready,
     _Scheduler_simple_SMP_Get_highest_ready,
     _Scheduler_simple_SMP_Move_from_ready_to_scheduled,
-    _Scheduler_SMP_Allocate_processor
+    _Scheduler_SMP_Allocate_processor_lazy
   );
 }
 
@@ -195,7 +195,7 @@ static void _Scheduler_simple_SMP_Enqueue_ordered(
     insert_scheduled,
     _Scheduler_simple_SMP_Move_from_scheduled_to_ready,
     _Scheduler_SMP_Get_lowest_scheduled,
-    _Scheduler_SMP_Allocate_processor
+    _Scheduler_SMP_Allocate_processor_lazy
   );
 }
 
@@ -243,7 +243,7 @@ static void _Scheduler_simple_SMP_Enqueue_scheduled_ordered(
     insert_ready,
     insert_scheduled,
     _Scheduler_simple_SMP_Move_from_ready_to_scheduled,
-    _Scheduler_SMP_Allocate_processor
+    _Scheduler_SMP_Allocate_processor_lazy
   );
 }