source: rtems/cpukit/score/src/schedulercbsgetremainingbudget.c @ 25f5730f

4.11
Last change on this file since 25f5730f was e1598a6, checked in by Sebastian Huber <sebastian.huber@…>, on Apr 4, 2014 at 8:56:36 AM

score: Static scheduler configuration

Do not allocate the scheduler control structures from the workspace.
This is a preparation step for configuration of clustered/partitioned
schedulers on SMP.

  • Property mode set to 100644
File size: 1.4 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Scheduler CBS Get Remaining Budget
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/schedulercbs.h>
22#include <rtems/score/threadimpl.h>
23
24int _Scheduler_CBS_Get_remaining_budget (
25  Scheduler_CBS_Server_id  server_id,
26  time_t                  *remaining_budget
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  if ( !_Scheduler_CBS_Server_list[server_id].initialized )
35    return SCHEDULER_CBS_ERROR_NOSERVER;
36  if ( _Scheduler_CBS_Server_list[server_id].task_id == -1 ) {
37    *remaining_budget = _Scheduler_CBS_Server_list[server_id].parameters.budget;
38    return SCHEDULER_CBS_OK;
39  }
40
41  the_thread = _Thread_Get(
42                 _Scheduler_CBS_Server_list[server_id].task_id,
43                 &location
44               );
45  /* The routine _Thread_Get may disable dispatch and not enable again. */
46  if ( the_thread ) {
47    *remaining_budget = the_thread->cpu_time_budget;
48    _Objects_Put( &the_thread->Object );
49  }
50  else {
51    *remaining_budget = 0;
52  }
53
54  return SCHEDULER_CBS_OK;
55}
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