source: rtems/cpukit/score/src/schedulercbsattachthread.c @ 4fc370e

4.115
Last change on this file since 4fc370e was 4fc370e, checked in by Sebastian Huber <sebastian.huber@…>, on Jun 5, 2013 at 10:08:23 AM

score: Move thread dispatch content to new file

Move thread dispatch declarations and inline functions to new header
<rtems/score/threaddispatch.h> to make it independent of the
Thread_Control structure. This avoids a cyclic dependency in case
thread dispatch functions are used for the object implementation.

  • Property mode set to 100644
File size: 1.9 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Attach Scheduler CBS Thread
5 *  @ingroup ScoreScheduler
6 */
7
8/*
9 *  Copyright (C) 2011 Petr Benes.
10 *  Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.com/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/system.h>
22#include <rtems/config.h>
23#include <rtems/score/scheduler.h>
24#include <rtems/score/schedulercbs.h>
25#include <rtems/score/threaddispatch.h>
26#include <rtems/rtems/object.h>
27
28int _Scheduler_CBS_Attach_thread (
29  Scheduler_CBS_Server_id server_id,
30  rtems_id                task_id
31)
32{
33  Objects_Locations location;
34  Thread_Control *the_thread;
35  Scheduler_CBS_Per_thread *sched_info;
36
37  if ( server_id >= _Scheduler_CBS_Maximum_servers )
38    return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
39
40  the_thread = _Thread_Get(task_id, &location);
41  /* The routine _Thread_Get may disable dispatch and not enable again. */
42  if ( the_thread )
43    _Thread_Enable_dispatch();
44  if ( !the_thread )
45    return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
46
47  sched_info = (Scheduler_CBS_Per_thread *) the_thread->scheduler_info;
48
49  /* Thread is already attached to a server. */
50  if ( sched_info->cbs_server )
51    return SCHEDULER_CBS_ERROR_FULL;
52
53  /* Server is not valid. */
54  if ( !_Scheduler_CBS_Server_list[server_id] )
55    return SCHEDULER_CBS_ERROR_NOSERVER;
56
57  /* Server is already attached to a thread. */
58  if ( _Scheduler_CBS_Server_list[server_id]->task_id != -1 )
59    return SCHEDULER_CBS_ERROR_FULL;
60
61  _Scheduler_CBS_Server_list[server_id]->task_id = task_id;
62  sched_info->cbs_server = (void *) _Scheduler_CBS_Server_list[server_id];
63
64  the_thread->budget_callout   = _Scheduler_CBS_Budget_callout;
65  the_thread->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
66  the_thread->is_preemptible   = true;
67
68  return SCHEDULER_CBS_OK;
69}
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