/**
* @file
*
* @brief Deterministic Priority SMP Scheduler Implementation
*
* @ingroup ScoreSchedulerSMP
*/
/*
* Copyright (c) 2013-2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/schedulerprioritysmp.h>
#include <rtems/score/schedulerpriorityimpl.h>
#include <rtems/score/schedulersmpimpl.h>
#include <rtems/score/wkspace.h>
static Scheduler_priority_SMP_Context *
_Scheduler_priority_SMP_Get_context( const Scheduler_Control *scheduler )
{
return (Scheduler_priority_SMP_Context *) scheduler->context;
}
static Scheduler_priority_SMP_Context *
_Scheduler_priority_SMP_Self_from_SMP_base( Scheduler_SMP_Context *smp_base )
{
return (Scheduler_priority_SMP_Context *)
( (char *) smp_base
- offsetof( Scheduler_priority_SMP_Context, Base ) );
}
void _Scheduler_priority_SMP_Initialize( const Scheduler_Control *scheduler )
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_SMP_Initialize( &self->Base );
_Priority_bit_map_Initialize( &self->Bit_map );
_Scheduler_priority_Ready_queue_initialize( &self->Ready[ 0 ] );
}
void _Scheduler_priority_SMP_Update(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_priority_Update_body(
thread,
&self->Bit_map,
&self->Ready[ 0 ]
);
}
static Thread_Control *_Scheduler_priority_SMP_Get_highest_ready(
Scheduler_SMP_Context *smp_base
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Self_from_SMP_base( smp_base );
Thread_Control *highest_ready = NULL;
if ( !_Priority_bit_map_Is_empty( &self->Bit_map ) ) {
highest_ready = _Scheduler_priority_Ready_queue_first(
&self->Bit_map,
&self->Ready[ 0 ]
);
}
return highest_ready;
}
static void _Scheduler_priority_SMP_Move_from_scheduled_to_ready(
Scheduler_SMP_Context *smp_base,
Thread_Control *scheduled_to_ready
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Self_from_SMP_base( smp_base );
_Chain_Extract_unprotected( &scheduled_to_ready->Object.Node );
_Scheduler_priority_Ready_queue_enqueue_first(
scheduled_to_ready,
&self->Bit_map
);
}
static void _Scheduler_priority_SMP_Move_from_ready_to_scheduled(
Scheduler_SMP_Context *smp_base,
Thread_Control *ready_to_scheduled
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Self_from_SMP_base( smp_base );
_Scheduler_priority_Ready_queue_extract(
ready_to_scheduled,
&self->Bit_map
);
_Scheduler_simple_Insert_priority_fifo(
&self->Base.Scheduled,
ready_to_scheduled
);
}
static void _Scheduler_priority_SMP_Insert_ready_lifo(
Scheduler_SMP_Context *smp_base,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Self_from_SMP_base( smp_base );
_Scheduler_priority_Ready_queue_enqueue( thread, &self->Bit_map );
}
static void _Scheduler_priority_SMP_Insert_ready_fifo(
Scheduler_SMP_Context *smp_base,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Self_from_SMP_base( smp_base );
_Scheduler_priority_Ready_queue_enqueue_first( thread, &self->Bit_map );
}
static void _Scheduler_priority_SMP_Do_extract(
Scheduler_SMP_Context *smp_base,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Self_from_SMP_base( smp_base );
bool is_scheduled = thread->is_scheduled;
thread->is_in_the_air = is_scheduled;
thread->is_scheduled = false;
if ( is_scheduled ) {
_Chain_Extract_unprotected( &thread->Object.Node );
} else {
_Scheduler_priority_Ready_queue_extract( thread, &self->Bit_map );
}
}
void _Scheduler_priority_SMP_Block(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_SMP_Block(
&self->Base,
thread,
_Scheduler_priority_SMP_Do_extract,
_Scheduler_priority_SMP_Get_highest_ready,
_Scheduler_priority_SMP_Move_from_ready_to_scheduled
);
}
static void _Scheduler_priority_SMP_Enqueue_ordered(
Scheduler_SMP_Context *self,
Thread_Control *thread,
Chain_Node_order order,
Scheduler_SMP_Insert insert_ready,
Scheduler_SMP_Insert insert_scheduled
)
{
_Scheduler_SMP_Enqueue_ordered(
self,
thread,
order,
_Scheduler_priority_SMP_Get_highest_ready,
insert_ready,
insert_scheduled,
_Scheduler_priority_SMP_Move_from_ready_to_scheduled,
_Scheduler_priority_SMP_Move_from_scheduled_to_ready
);
}
void _Scheduler_priority_SMP_Enqueue_lifo(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_priority_SMP_Enqueue_ordered(
&self->Base,
thread,
_Scheduler_simple_Insert_priority_lifo_order,
_Scheduler_priority_SMP_Insert_ready_lifo,
_Scheduler_SMP_Insert_scheduled_lifo
);
}
void _Scheduler_priority_SMP_Enqueue_fifo(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_priority_SMP_Enqueue_ordered(
&self->Base,
thread,
_Scheduler_simple_Insert_priority_fifo_order,
_Scheduler_priority_SMP_Insert_ready_fifo,
_Scheduler_SMP_Insert_scheduled_fifo
);
}
void _Scheduler_priority_SMP_Extract(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_SMP_Extract(
&self->Base,
thread,
_Scheduler_priority_SMP_Do_extract
);
}
void _Scheduler_priority_SMP_Yield(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
ISR_Level level;
_ISR_Disable( level );
_Scheduler_priority_SMP_Extract( scheduler, thread );
_Scheduler_priority_SMP_Enqueue_fifo( scheduler, thread );
_ISR_Enable( level );
}
void _Scheduler_priority_SMP_Schedule(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_SMP_Schedule(
&self->Base,
thread,
_Scheduler_priority_SMP_Get_highest_ready,
_Scheduler_priority_SMP_Move_from_ready_to_scheduled
);
}
void _Scheduler_priority_SMP_Start_idle(
const Scheduler_Control *scheduler,
Thread_Control *thread,
Per_CPU_Control *cpu
)
{
Scheduler_priority_SMP_Context *self =
_Scheduler_priority_SMP_Get_context( scheduler );
_Scheduler_SMP_Start_idle( &self->Base, thread, cpu );
}