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/**
* @file
*
* @brief Simple SMP Scheduler Implementation
*
* @ingroup ScoreSchedulerSMP
*/
/*
* 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>
#include <rtems/score/wkspace.h>
static Scheduler_simple_SMP_Control *
_Scheduler_simple_SMP_Self_from_base( Scheduler_Control *base )
{
return (Scheduler_simple_SMP_Control *) base->information;
}
static Scheduler_simple_SMP_Control *
_Scheduler_simple_SMP_Self_from_SMP_base( Scheduler_SMP_Control *smp_base )
{
return (Scheduler_simple_SMP_Control *)
( (char *) smp_base - offsetof( Scheduler_simple_SMP_Control, Base ) );
}
void _Scheduler_simple_smp_Initialize( void )
{
Scheduler_simple_SMP_Control *self =
_Workspace_Allocate_or_fatal_error( sizeof( *self ) );
_Scheduler_SMP_Initialize( &self->Base );
_Chain_Initialize_empty( &self->Ready );
_Scheduler.information = self;
}
static Thread_Control *_Scheduler_simple_smp_Get_highest_ready(
Scheduler_SMP_Control *smp_base
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_SMP_base( smp_base );
Thread_Control *highest_ready = NULL;
Chain_Control *ready = &self->Ready;
if ( !_Chain_Is_empty( ready ) ) {
highest_ready = (Thread_Control *) _Chain_First( ready );
}
return highest_ready;
}
static void _Scheduler_simple_smp_Move_from_scheduled_to_ready(
Scheduler_SMP_Control *smp_base,
Thread_Control *scheduled_to_ready
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_SMP_base( smp_base );
_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_SMP_Control *smp_base,
Thread_Control *ready_to_scheduled
)
{
_Chain_Extract_unprotected( &ready_to_scheduled->Object.Node );
_Scheduler_simple_Insert_priority_fifo(
&smp_base->Scheduled,
ready_to_scheduled
);
}
static void _Scheduler_simple_smp_Insert_ready_lifo(
Scheduler_SMP_Control *smp_base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_SMP_base( smp_base );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&thread->Object.Node,
_Scheduler_simple_Insert_priority_lifo_order
);
}
static void _Scheduler_simple_smp_Insert_ready_fifo(
Scheduler_SMP_Control *smp_base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_SMP_base( smp_base );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&thread->Object.Node,
_Scheduler_simple_Insert_priority_fifo_order
);
}
static void _Scheduler_simple_smp_Do_extract(
Scheduler_SMP_Control *smp_base,
Thread_Control *thread
)
{
(void) smp_base;
thread->is_in_the_air = thread->is_scheduled;
thread->is_scheduled = false;
_Chain_Extract_unprotected( &thread->Object.Node );
}
void _Scheduler_simple_smp_Block(
Scheduler_Control *base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_base( base );
_Scheduler_SMP_Block(
&self->Base,
thread,
_Scheduler_simple_smp_Do_extract,
_Scheduler_simple_smp_Get_highest_ready,
_Scheduler_simple_smp_Move_from_ready_to_scheduled
);
}
static void _Scheduler_simple_smp_Enqueue_ordered(
Scheduler_SMP_Control *smp_base,
Thread_Control *thread,
Chain_Node_order order,
Scheduler_SMP_Insert insert_ready,
Scheduler_SMP_Insert insert_scheduled
)
{
_Scheduler_SMP_Enqueue_ordered(
smp_base,
thread,
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
);
}
void _Scheduler_simple_smp_Enqueue_priority_lifo(
Scheduler_Control *base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_base( base );
_Scheduler_simple_smp_Enqueue_ordered(
&self->Base,
thread,
_Scheduler_simple_Insert_priority_lifo_order,
_Scheduler_simple_smp_Insert_ready_lifo,
_Scheduler_SMP_Insert_scheduled_lifo
);
}
void _Scheduler_simple_smp_Enqueue_priority_fifo(
Scheduler_Control *base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_base( base );
_Scheduler_simple_smp_Enqueue_ordered(
&self->Base,
thread,
_Scheduler_simple_Insert_priority_fifo_order,
_Scheduler_simple_smp_Insert_ready_fifo,
_Scheduler_SMP_Insert_scheduled_fifo
);
}
void _Scheduler_simple_smp_Extract(
Scheduler_Control *base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_base( base );
_Scheduler_SMP_Extract(
&self->Base,
thread,
_Scheduler_simple_smp_Do_extract
);
}
void _Scheduler_simple_smp_Yield(
Scheduler_Control *base,
Thread_Control *thread
)
{
ISR_Level level;
_ISR_Disable( level );
_Scheduler_simple_smp_Extract( base, thread );
_Scheduler_simple_smp_Enqueue_priority_fifo( base, thread );
_ISR_Enable( level );
}
void _Scheduler_simple_smp_Schedule(
Scheduler_Control *base,
Thread_Control *thread
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_base( base );
_Scheduler_SMP_Schedule(
&self->Base,
thread,
_Scheduler_simple_smp_Get_highest_ready,
_Scheduler_simple_smp_Move_from_ready_to_scheduled
);
}
void _Scheduler_simple_smp_Start_idle(
Scheduler_Control *base,
Thread_Control *thread,
Per_CPU_Control *cpu
)
{
Scheduler_simple_SMP_Control *self =
_Scheduler_simple_SMP_Self_from_base( base );
_Scheduler_SMP_Start_idle( &self->Base, thread, cpu );
}
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