/**
* @file
*
* @brief Simple SMP Scheduler Implementation
*
* @ingroup ScoreSchedulerSMPSimple
*/
/*
* Copyright (c) 2013-2014 embedded brains GmbH.
*
* 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/schedulersimplesmp.h>
#include <rtems/score/schedulersmpimpl.h>
static Scheduler_simple_SMP_Context *
_Scheduler_simple_SMP_Get_context( const Scheduler_Control *scheduler )
{
return (Scheduler_simple_SMP_Context *) _Scheduler_Get_context( scheduler );
}
static Scheduler_simple_SMP_Context *
_Scheduler_simple_SMP_Get_self( Scheduler_Context *context )
{
return (Scheduler_simple_SMP_Context *) context;
}
void _Scheduler_simple_SMP_Initialize( const Scheduler_Control *scheduler )
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_context( scheduler );
_Scheduler_SMP_Initialize( &self->Base );
_Chain_Initialize_empty( &self->Ready );
}
bool _Scheduler_simple_SMP_Allocate(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_SMP_Node *node = _Scheduler_SMP_Node_get( the_thread );
_Scheduler_SMP_Node_initialize( node );
return true;
}
static void _Scheduler_simple_SMP_Do_update(
Scheduler_Context *context,
Scheduler_Node *node,
Priority_Control new_priority
)
{
(void) context;
(void) node;
(void) new_priority;
}
static Thread_Control *_Scheduler_simple_SMP_Get_highest_ready(
Scheduler_Context *context
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
return (Thread_Control *) _Chain_First( &self->Ready );
}
static void _Scheduler_simple_SMP_Move_from_scheduled_to_ready(
Scheduler_Context *context,
Thread_Control *scheduled_to_ready
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Extract_unprotected( &scheduled_to_ready->Object.Node );
_Scheduler_simple_Insert_priority_lifo(
&self->Ready,
scheduled_to_ready
);
}
static void _Scheduler_simple_SMP_Move_from_ready_to_scheduled(
Scheduler_Context *context,
Thread_Control *ready_to_scheduled
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Extract_unprotected( &ready_to_scheduled->Object.Node );
_Scheduler_simple_Insert_priority_fifo(
&self->Base.Scheduled,
ready_to_scheduled
);
}
static void _Scheduler_simple_SMP_Insert_ready_lifo(
Scheduler_Context *context,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&thread->Object.Node,
_Scheduler_simple_Insert_priority_lifo_order
);
}
static void _Scheduler_simple_SMP_Insert_ready_fifo(
Scheduler_Context *context,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&thread->Object.Node,
_Scheduler_simple_Insert_priority_fifo_order
);
}
static void _Scheduler_simple_SMP_Extract_from_ready(
Scheduler_Context *context,
Thread_Control *thread
)
{
(void) context;
_Chain_Extract_unprotected( &thread->Object.Node );
}
void _Scheduler_simple_SMP_Block(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
_Scheduler_SMP_Block(
context,
thread,
_Scheduler_simple_SMP_Extract_from_ready,
_Scheduler_simple_SMP_Get_highest_ready,
_Scheduler_simple_SMP_Move_from_ready_to_scheduled
);
}
static void _Scheduler_simple_SMP_Enqueue_ordered(
Scheduler_Context *context,
Thread_Control *thread,
bool has_processor_allocated,
Chain_Node_order order,
Scheduler_SMP_Insert insert_ready,
Scheduler_SMP_Insert insert_scheduled
)
{
_Scheduler_SMP_Enqueue_ordered(
context,
thread,
has_processor_allocated,
order,
_Scheduler_simple_SMP_Get_highest_ready,
insert_ready,
insert_scheduled,
_Scheduler_simple_SMP_Move_from_ready_to_scheduled,
_Scheduler_simple_SMP_Move_from_scheduled_to_ready
);
}
static void _Scheduler_simple_SMP_Enqueue_lifo(
Scheduler_Context *context,
Thread_Control *thread,
bool has_processor_allocated
)
{
_Scheduler_simple_SMP_Enqueue_ordered(
context,
thread,
has_processor_allocated,
_Scheduler_simple_Insert_priority_lifo_order,
_Scheduler_simple_SMP_Insert_ready_lifo,
_Scheduler_SMP_Insert_scheduled_lifo
);
}
static void _Scheduler_simple_SMP_Enqueue_fifo(
Scheduler_Context *context,
Thread_Control *thread,
bool has_processor_allocated
)
{
_Scheduler_simple_SMP_Enqueue_ordered(
context,
thread,
has_processor_allocated,
_Scheduler_simple_Insert_priority_fifo_order,
_Scheduler_simple_SMP_Insert_ready_fifo,
_Scheduler_SMP_Insert_scheduled_fifo
);
}
void _Scheduler_simple_SMP_Unblock(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
_Scheduler_simple_SMP_Enqueue_fifo( context, thread, false );
}
void _Scheduler_simple_SMP_Change_priority(
const Scheduler_Control *scheduler,
Thread_Control *thread,
Priority_Control new_priority,
bool prepend_it
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
_Scheduler_SMP_Change_priority(
context,
thread,
new_priority,
prepend_it,
_Scheduler_simple_SMP_Extract_from_ready,
_Scheduler_simple_SMP_Do_update,
_Scheduler_simple_SMP_Enqueue_fifo,
_Scheduler_simple_SMP_Enqueue_lifo
);
}
void _Scheduler_simple_SMP_Yield(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
ISR_Level level;
_ISR_Disable( level );
_Scheduler_SMP_Extract_from_scheduled( thread );
_Scheduler_simple_SMP_Enqueue_fifo( context, thread, true );
_ISR_Enable( level );
}