/**
* @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 );
}
void _Scheduler_simple_SMP_Node_initialize(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_SMP_Node *node = _Scheduler_SMP_Thread_get_own_node( the_thread );
_Scheduler_SMP_Node_initialize( node, the_thread );
}
static void _Scheduler_simple_SMP_Do_update(
Scheduler_Context *context,
Scheduler_Node *node_to_update,
Priority_Control new_priority
)
{
Scheduler_SMP_Node *node = _Scheduler_SMP_Node_downcast( node_to_update );
(void) context;
_Scheduler_SMP_Node_update_priority( node, new_priority );
}
void _Scheduler_simple_SMP_Update_priority(
const Scheduler_Control *scheduler,
Thread_Control *thread,
Priority_Control new_priority
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
Scheduler_Node *node = _Scheduler_Thread_get_node( thread );
_Scheduler_simple_SMP_Do_update( context, node, new_priority );
}
static Scheduler_Node *_Scheduler_simple_SMP_Get_highest_ready(
Scheduler_Context *context,
Scheduler_Node *node
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
Scheduler_Node *first = (Scheduler_Node *) _Chain_First( &self->Ready );
(void) node;
_Assert( &first->Node != _Chain_Tail( &self->Ready ) );
return first;
}
static void _Scheduler_simple_SMP_Move_from_scheduled_to_ready(
Scheduler_Context *context,
Scheduler_Node *scheduled_to_ready
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Extract_unprotected( &scheduled_to_ready->Node );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&scheduled_to_ready->Node,
_Scheduler_SMP_Insert_priority_lifo_order
);
}
static void _Scheduler_simple_SMP_Move_from_ready_to_scheduled(
Scheduler_Context *context,
Scheduler_Node *ready_to_scheduled
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Extract_unprotected( &ready_to_scheduled->Node );
_Chain_Insert_ordered_unprotected(
&self->Base.Scheduled,
&ready_to_scheduled->Node,
_Scheduler_SMP_Insert_priority_fifo_order
);
}
static void _Scheduler_simple_SMP_Insert_ready_lifo(
Scheduler_Context *context,
Scheduler_Node *node_to_insert
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&node_to_insert->Node,
_Scheduler_SMP_Insert_priority_lifo_order
);
}
static void _Scheduler_simple_SMP_Insert_ready_fifo(
Scheduler_Context *context,
Scheduler_Node *node_to_insert
)
{
Scheduler_simple_SMP_Context *self =
_Scheduler_simple_SMP_Get_self( context );
_Chain_Insert_ordered_unprotected(
&self->Ready,
&node_to_insert->Node,
_Scheduler_SMP_Insert_priority_fifo_order
);
}
static void _Scheduler_simple_SMP_Extract_from_ready(
Scheduler_Context *context,
Scheduler_Node *node_to_extract
)
{
(void) context;
_Chain_Extract_unprotected( &node_to_extract->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,
_Scheduler_SMP_Allocate_processor_lazy
);
}
static Thread_Control *_Scheduler_simple_SMP_Enqueue_ordered(
Scheduler_Context *context,
Scheduler_Node *node,
Thread_Control *needs_help,
Chain_Node_order order,
Scheduler_SMP_Insert insert_ready,
Scheduler_SMP_Insert insert_scheduled
)
{
return _Scheduler_SMP_Enqueue_ordered(
context,
node,
needs_help,
order,
insert_ready,
insert_scheduled,
_Scheduler_simple_SMP_Move_from_scheduled_to_ready,
_Scheduler_SMP_Get_lowest_scheduled,
_Scheduler_SMP_Allocate_processor_lazy
);
}
static Thread_Control *_Scheduler_simple_SMP_Enqueue_lifo(
Scheduler_Context *context,
Scheduler_Node *node,
Thread_Control *needs_help
)
{
return _Scheduler_simple_SMP_Enqueue_ordered(
context,
node,
needs_help,
_Scheduler_SMP_Insert_priority_lifo_order,
_Scheduler_simple_SMP_Insert_ready_lifo,
_Scheduler_SMP_Insert_scheduled_lifo
);
}
static Thread_Control *_Scheduler_simple_SMP_Enqueue_fifo(
Scheduler_Context *context,
Scheduler_Node *node,
Thread_Control *needs_help
)
{
return _Scheduler_simple_SMP_Enqueue_ordered(
context,
node,
needs_help,
_Scheduler_SMP_Insert_priority_fifo_order,
_Scheduler_simple_SMP_Insert_ready_fifo,
_Scheduler_SMP_Insert_scheduled_fifo
);
}
static Thread_Control *_Scheduler_simple_SMP_Enqueue_scheduled_ordered(
Scheduler_Context *context,
Scheduler_Node *node,
Chain_Node_order order,
Scheduler_SMP_Insert insert_ready,
Scheduler_SMP_Insert insert_scheduled
)
{
return _Scheduler_SMP_Enqueue_scheduled_ordered(
context,
node,
order,
_Scheduler_simple_SMP_Extract_from_ready,
_Scheduler_simple_SMP_Get_highest_ready,
insert_ready,
insert_scheduled,
_Scheduler_simple_SMP_Move_from_ready_to_scheduled,
_Scheduler_SMP_Allocate_processor_lazy
);
}
static Thread_Control *_Scheduler_simple_SMP_Enqueue_scheduled_lifo(
Scheduler_Context *context,
Scheduler_Node *node
)
{
return _Scheduler_simple_SMP_Enqueue_scheduled_ordered(
context,
node,
_Scheduler_SMP_Insert_priority_lifo_order,
_Scheduler_simple_SMP_Insert_ready_lifo,
_Scheduler_SMP_Insert_scheduled_lifo
);
}
static Thread_Control *_Scheduler_simple_SMP_Enqueue_scheduled_fifo(
Scheduler_Context *context,
Scheduler_Node *node
)
{
return _Scheduler_simple_SMP_Enqueue_scheduled_ordered(
context,
node,
_Scheduler_SMP_Insert_priority_fifo_order,
_Scheduler_simple_SMP_Insert_ready_fifo,
_Scheduler_SMP_Insert_scheduled_fifo
);
}
Thread_Control *_Scheduler_simple_SMP_Unblock(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
return _Scheduler_SMP_Unblock(
context,
thread,
_Scheduler_simple_SMP_Enqueue_fifo
);
}
Thread_Control *_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 );
return _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,
_Scheduler_simple_SMP_Enqueue_scheduled_fifo,
_Scheduler_simple_SMP_Enqueue_scheduled_lifo
);
}
Thread_Control *_Scheduler_simple_SMP_Ask_for_help(
const Scheduler_Control *scheduler,
Thread_Control *offers_help,
Thread_Control *needs_help
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
return _Scheduler_SMP_Ask_for_help(
context,
offers_help,
needs_help,
_Scheduler_simple_SMP_Enqueue_fifo
);
}
Thread_Control *_Scheduler_simple_SMP_Yield(
const Scheduler_Control *scheduler,
Thread_Control *thread
)
{
Scheduler_Context *context = _Scheduler_Get_context( scheduler );
return _Scheduler_SMP_Yield(
context,
thread,
_Scheduler_simple_SMP_Extract_from_ready,
_Scheduler_simple_SMP_Enqueue_fifo,
_Scheduler_simple_SMP_Enqueue_scheduled_fifo
);
}