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/*
* Copyright (C) 2011 Petr Benes.
* Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/config.h>
#include <rtems/score/scheduler.h>
#include <rtems/score/schedulercbs.h>
#include <rtems/rtems/object.h>
int _Scheduler_CBS_Attach_thread (
Scheduler_CBS_Server_id server_id,
rtems_id task_id
)
{
Objects_Locations location;
Thread_Control *the_thread;
Scheduler_CBS_Per_thread *sched_info;
if ( server_id < 0 || server_id >= _Scheduler_CBS_Maximum_servers )
return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
the_thread = _Thread_Get(task_id, &location);
/* The routine _Thread_Get may disable dispatch and not enable again. */
if ( the_thread )
_Thread_Enable_dispatch();
if ( !the_thread )
return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
sched_info = (Scheduler_CBS_Per_thread *) the_thread->scheduler_info;
/* Thread is already attached to a server. */
if ( sched_info->cbs_server )
return SCHEDULER_CBS_ERROR_FULL;
/* Server is not valid. */
if ( !_Scheduler_CBS_Server_list[server_id] )
return SCHEDULER_CBS_ERROR_NOSERVER;
/* Server is already attached to a thread. */
if ( _Scheduler_CBS_Server_list[server_id]->task_id != -1 )
return SCHEDULER_CBS_ERROR_FULL;
_Scheduler_CBS_Server_list[server_id]->task_id = task_id;
sched_info->cbs_server = (void *) _Scheduler_CBS_Server_list[server_id];
the_thread->budget_callout = _Scheduler_CBS_Budget_callout;
the_thread->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
the_thread->is_preemptible = true;
return SCHEDULER_CBS_OK;
}
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