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/**
* @file
*
* @brief Attach Scheduler CBS Thread
* @ingroup ScoreScheduler
*/
/*
* 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.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/schedulercbsimpl.h>
#include <rtems/score/threadimpl.h>
int _Scheduler_CBS_Attach_thread (
Scheduler_CBS_Server_id server_id,
rtems_id task_id
)
{
Scheduler_CBS_Server *server;
ISR_lock_Context lock_context;
Thread_Control *the_thread;
Scheduler_CBS_Node *node;
if ( server_id >= _Scheduler_CBS_Maximum_servers ) {
return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
}
server = &_Scheduler_CBS_Server_list[ server_id ];
if ( !server->initialized ) {
return SCHEDULER_CBS_ERROR_NOSERVER;
}
if ( server->task_id != -1 ) {
return SCHEDULER_CBS_ERROR_FULL;
}
the_thread = _Thread_Get( task_id, &lock_context );
if ( the_thread == NULL ) {
return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
}
node = _Scheduler_CBS_Thread_get_node( the_thread );
if ( node->cbs_server != NULL ) {
_ISR_lock_ISR_enable( &lock_context );
return SCHEDULER_CBS_ERROR_FULL;
}
node->cbs_server = server;
server->task_id = task_id;
the_thread->budget_callout = _Scheduler_CBS_Budget_callout;
the_thread->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
the_thread->is_preemptible = true;
_ISR_lock_ISR_enable( &lock_context );
return SCHEDULER_CBS_OK;
}
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