source: rtems/cpukit/rtems/src/taskmode.c @ e980b219

4.104.114.84.95
Last change on this file since e980b219 was e980b219, checked in by Joel Sherrill <joel.sherrill@…>, on 05/06/04 at 19:21:40

2004-05-06 Joel Sherrill <joel@…>

PR 618/rtems

  • rtems/include/rtems/rtems/status.h, rtems/src/clockget.c, rtems/src/clockset.c, rtems/src/dpmemcreate.c, rtems/src/dpmemexternal2internal.c, rtems/src/dpmeminternal2external.c, rtems/src/eventmp.c, rtems/src/eventreceive.c, rtems/src/eventsend.c, rtems/src/msgqbroadcast.c, rtems/src/msgqcreate.c, rtems/src/msgqflush.c, rtems/src/msgqgetnumberpending.c, rtems/src/msgqreceive.c, rtems/src/msgqsubmit.c, rtems/src/partcreate.c, rtems/src/partdelete.c, rtems/src/partgetbuffer.c, rtems/src/ratemoncancel.c, rtems/src/ratemoncreate.c, rtems/src/ratemondelete.c, rtems/src/ratemongetstatus.c, rtems/src/ratemonident.c, rtems/src/ratemonperiod.c, rtems/src/regioncreate.c, rtems/src/regiondelete.c, rtems/src/regionextend.c, rtems/src/regiongetsegment.c, rtems/src/regiongetsegmentsize.c, rtems/src/regionreturnsegment.c, rtems/src/semcreate.c, rtems/src/semdelete.c, rtems/src/semflush.c, rtems/src/semident.c, rtems/src/taskcreate.c, rtems/src/taskgetnote.c, rtems/src/taskmode.c, rtems/src/taskrestart.c, rtems/src/taskresume.c, rtems/src/tasksetnote.c, rtems/src/tasksuspend.c, rtems/src/taskvariableadd.c, rtems/src/taskvariabledelete.c, rtems/src/taskvariableget.c, rtems/src/taskwakewhen.c, rtems/src/timercreate.c, rtems/src/timerdelete.c, rtems/src/timerfireafter.c, rtems/src/timerfirewhen.c, rtems/src/timerserverfireafter.c, rtems/src/timerserverfirewhen.c, score/include/rtems/score/object.h, score/src/coretodvalidate.c, score/src/objectnametoid.c: Add NULL checks.
  • Property mode set to 100644
File size: 3.2 KB
Line 
1/*
2 *  RTEMS Task Manager
3 *
4 *
5 *  COPYRIGHT (c) 1989-1999.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#include <rtems/system.h>
16#include <rtems/rtems/status.h>
17#include <rtems/rtems/support.h>
18#include <rtems/rtems/modes.h>
19#include <rtems/score/object.h>
20#include <rtems/score/stack.h>
21#include <rtems/score/states.h>
22#include <rtems/rtems/tasks.h>
23#include <rtems/score/thread.h>
24#include <rtems/score/threadq.h>
25#include <rtems/score/tod.h>
26#include <rtems/score/userext.h>
27#include <rtems/score/wkspace.h>
28#include <rtems/score/apiext.h>
29#include <rtems/score/sysstate.h>
30
31/*PAGE
32 *
33 *  rtems_task_mode
34 *
35 *  This directive enables and disables several modes of
36 *  execution for the requesting thread.
37 *
38 *  Input parameters:
39 *    mode_set          - new mode
40 *    mask              - mask
41 *    previous_mode_set - address of previous mode set
42 *
43 *  Output:
44 *    *previous_mode_set - previous mode set
45 *     always return RTEMS_SUCCESSFUL;
46 */
47
48rtems_status_code rtems_task_mode(
49  rtems_mode  mode_set,
50  rtems_mode  mask,
51  rtems_mode *previous_mode_set
52)
53{
54  Thread_Control     *executing;
55  RTEMS_API_Control  *api;
56  ASR_Information    *asr;
57  boolean             is_asr_enabled = FALSE;
58  boolean             needs_asr_dispatching = FALSE;
59  rtems_mode          old_mode;
60
61  if ( !previous_mode_set )
62    return RTEMS_INVALID_ADDRESS;
63
64  executing     = _Thread_Executing;
65  api = executing->API_Extensions[ THREAD_API_RTEMS ];
66  asr = &api->Signal;
67
68  old_mode  = (executing->is_preemptible) ? RTEMS_PREEMPT : RTEMS_NO_PREEMPT;
69
70  if ( executing->budget_algorithm == THREAD_CPU_BUDGET_ALGORITHM_NONE )
71    old_mode |= RTEMS_NO_TIMESLICE;
72  else
73    old_mode |= RTEMS_TIMESLICE;
74
75  old_mode |= (asr->is_enabled) ? RTEMS_ASR : RTEMS_NO_ASR;
76  old_mode |= _ISR_Get_level();
77
78  *previous_mode_set = old_mode;
79
80  /*
81   *  These are generic thread scheduling characteristics.
82   */
83
84  if ( mask & RTEMS_PREEMPT_MASK )
85    executing->is_preemptible = _Modes_Is_preempt(mode_set) ? TRUE : FALSE;
86
87  if ( mask & RTEMS_TIMESLICE_MASK ) {
88    if ( _Modes_Is_timeslice(mode_set) )
89      executing->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE;
90    else
91      executing->budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE;
92  }
93
94  /*
95   *  Set the new interrupt level
96   */
97
98  if ( mask & RTEMS_INTERRUPT_MASK )
99    _Modes_Set_interrupt_level( mode_set );
100
101  /*
102   *  This is specific to the RTEMS API
103   */
104
105  is_asr_enabled = FALSE;
106  needs_asr_dispatching = FALSE;
107
108  if ( mask & RTEMS_ASR_MASK ) {
109    is_asr_enabled = _Modes_Is_asr_disabled( mode_set ) ? FALSE : TRUE;
110    if ( is_asr_enabled != asr->is_enabled ) {
111      asr->is_enabled = is_asr_enabled;
112      _ASR_Swap_signals( asr );
113      if ( _ASR_Are_signals_pending( asr ) ) {
114        needs_asr_dispatching = TRUE;
115        executing->do_post_task_switch_extension = TRUE;
116      }
117    }
118  }
119
120  if ( _System_state_Is_up(_System_state_Current) )
121    if ( _Thread_Evaluate_mode() || needs_asr_dispatching )
122      _Thread_Dispatch();
123
124  return RTEMS_SUCCESSFUL;
125}
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