Scheduler_Void_or_thread _Scheduler_EDF_Yield(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_EDF_Context *context =
_Scheduler_EDF_Get_context( scheduler );
Scheduler_EDF_Node *node = _Scheduler_EDF_Thread_get_node( the_thread );
/*
* The RBTree has more than one node, enqueue behind the tasks
* with the same priority in case there are such ones.
*/
_RBTree_Extract( &context->Ready, &node->Node );
_RBTree_Insert(
&context->Ready,
&node->Node,
_Scheduler_EDF_Compare,
false
);
_Scheduler_EDF_Schedule_body( scheduler, the_thread, false );
SCHEDULER_RETURN_VOID_OR_NULL;
}
void _Scheduler_EDF_Change_priority(
const Scheduler_Control *scheduler,
Thread_Control *the_thread,
Priority_Control new_priority,
bool prepend_it
)
{
Scheduler_EDF_Context *context =
_Scheduler_EDF_Get_context( scheduler );
Scheduler_EDF_Node *node = _Scheduler_EDF_Node_get( the_thread );
_RBTree_Extract( &context->Ready, &node->Node );
_RBTree_Insert( &context->Ready, &node->Node );
}
Scheduler_Void_or_thread _Scheduler_EDF_Change_priority(
const Scheduler_Control *scheduler,
Thread_Control *the_thread,
Priority_Control new_priority,
bool prepend_it
)
{
Scheduler_EDF_Context *context =
_Scheduler_EDF_Get_context( scheduler );
Scheduler_EDF_Node *node = _Scheduler_EDF_Thread_get_node( the_thread );
_RBTree_Extract( &context->Ready, &node->Node );
_RBTree_Insert(
&context->Ready,
&node->Node,
_Scheduler_EDF_Compare,
false
);
SCHEDULER_RETURN_VOID_OR_NULL;
}
Scheduler_Void_or_thread _Scheduler_EDF_Unblock(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_EDF_Context *context;
Scheduler_EDF_Node *node;
Priority_Control priority;
bool prepend_it;
context = _Scheduler_EDF_Get_context( scheduler );
node = _Scheduler_EDF_Thread_get_node( the_thread );
priority = _Scheduler_Node_get_priority( &node->Base, &prepend_it );
(void) prepend_it;
node->current_priority = priority;
_Scheduler_EDF_Enqueue( context, node, priority );
/*
* If the thread that was unblocked is more important than the heir,
* then we have a new heir. This may or may not result in a
* context switch.
*
* Normal case:
* If the current thread is preemptible, then we need to do
* a context switch.
* Pseudo-ISR case:
* Even if the thread isn't preemptible, if the new heir is
* a pseudo-ISR system task, we need to do a context switch.
*/
if ( priority < _Thread_Heir->current_priority ) {
_Scheduler_Update_heir(
the_thread,
priority == ( SCHEDULER_EDF_PRIO_MSB | PRIORITY_PSEUDO_ISR )
);
}
SCHEDULER_RETURN_VOID_OR_NULL;
}
