source: rtems/cpukit/score/src/schedulercbsattachthread.c @ bbd6d27a

5
Last change on this file since bbd6d27a was 08d9760, checked in by Sebastian Huber <sebastian.huber@…>, on 07/08/14 at 12:25:55

score: Rename *_Node_get() to *_Thread_get_node()

This emphasizes that the scheduler node of a thread is returned and this
is not a function working with scheduler nodes like the other *_Node_*()
functions.

  • Property mode set to 100644
File size: 1.8 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.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/score/schedulercbsimpl.h>
22#include <rtems/score/threadimpl.h>
23
24int _Scheduler_CBS_Attach_thread (
25  Scheduler_CBS_Server_id server_id,
26  rtems_id                task_id
27)
28{
29  Objects_Locations location;
30  Thread_Control *the_thread;
31
32  if ( server_id >= _Scheduler_CBS_Maximum_servers )
33    return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
34
35  /* Server is not valid. */
36  if ( !_Scheduler_CBS_Server_list[server_id].initialized )
37    return SCHEDULER_CBS_ERROR_NOSERVER;
38
39  /* Server is already attached to a thread. */
40  if ( _Scheduler_CBS_Server_list[server_id].task_id != -1 )
41    return SCHEDULER_CBS_ERROR_FULL;
42
43  the_thread = _Thread_Get(task_id, &location);
44  /* The routine _Thread_Get may disable dispatch and not enable again. */
45  if ( the_thread ) {
46    Scheduler_CBS_Node *node = _Scheduler_CBS_Thread_get_node( the_thread );
47
48    /* Thread is already attached to a server. */
49    if ( node->cbs_server ) {
50      _Objects_Put( &the_thread->Object );
51      return SCHEDULER_CBS_ERROR_FULL;
52    }
53
54    _Scheduler_CBS_Server_list[server_id].task_id = task_id;
55    node->cbs_server = &_Scheduler_CBS_Server_list[server_id];
56
57    the_thread->budget_callout   = _Scheduler_CBS_Budget_callout;
58    the_thread->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
59    the_thread->is_preemptible   = true;
60
61    _Objects_Put( &the_thread->Object );
62  } else {
63    return SCHEDULER_CBS_ERROR_INVALID_PARAMETER;
64  }
65
66  return SCHEDULER_CBS_OK;
67}
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