void _Scheduler_simple_Update_priority(
const Scheduler_Control *scheduler,
Thread_Control *the_thread,
Scheduler_Node *node
)
{
Scheduler_simple_Context *context;
bool prepend_it;
if ( !_Thread_Is_ready( the_thread ) ) {
/* Nothing to do */
return;
}
context = _Scheduler_simple_Get_context( scheduler );
_Scheduler_Node_get_priority( node, &prepend_it );
_Scheduler_simple_Extract( scheduler, the_thread, node );
if ( prepend_it ) {
_Scheduler_simple_Insert_priority_lifo( &context->Ready, the_thread );
} else {
_Scheduler_simple_Insert_priority_fifo( &context->Ready, the_thread );
}
_Scheduler_simple_Schedule_body( scheduler, the_thread, false );
}
void _Scheduler_simple_Yield(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_simple_Context *context =
_Scheduler_simple_Get_context( scheduler );
ISR_Level level;
_ISR_Disable( level );
_Chain_Extract_unprotected( &the_thread->Object.Node );
_Scheduler_simple_Insert_priority_fifo( &context->Ready, the_thread );
_ISR_Flash( level );
_Scheduler_simple_Schedule_body( scheduler, the_thread, false );
_ISR_Enable( level );
}
Scheduler_Void_or_bool _Scheduler_simple_Unblock(
const Scheduler_Control *scheduler,
Thread_Control *the_thread,
Scheduler_Node *node
)
{
Scheduler_simple_Context *context;
Priority_Control priority;
(void) node;
context = _Scheduler_simple_Get_context( scheduler );
_Scheduler_simple_Insert_priority_fifo( &context->Ready, the_thread );
priority = _Thread_Get_priority( the_thread );
/*
* 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_Get_priority( _Thread_Heir ) ) {
_Scheduler_Update_heir(
the_thread,
priority == PRIORITY_PSEUDO_ISR
);
}
SCHEDULER_RETURN_VOID_OR_BOOL;
}