source: rtems/cpukit/score/src/threadsuspend.c @ a8eed23

4.104.114.84.95
Last change on this file since a8eed23 was a8eed23, checked in by Ralf Corsepius <ralf.corsepius@…>, on 01/27/05 at 05:57:05

Include config.h.

  • Property mode set to 100644
File size: 1.9 KB
Line 
1/*
2 *  Thread Handler
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 found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#if HAVE_CONFIG_H
16#include "config.h"
17#endif
18
19#include <rtems/system.h>
20#include <rtems/score/apiext.h>
21#include <rtems/score/context.h>
22#include <rtems/score/interr.h>
23#include <rtems/score/isr.h>
24#include <rtems/score/object.h>
25#include <rtems/score/priority.h>
26#include <rtems/score/states.h>
27#include <rtems/score/sysstate.h>
28#include <rtems/score/thread.h>
29#include <rtems/score/threadq.h>
30#include <rtems/score/userext.h>
31#include <rtems/score/wkspace.h>
32
33/*PAGE
34 *
35 * _Thread_Suspend
36 *
37 * This kernel routine sets the SUSPEND state in the THREAD.  The
38 * THREAD chain and suspend count are adjusted if necessary.
39 *
40 * Input parameters:
41 *   the_thread   - pointer to thread control block
42 *
43 * Output parameters:  NONE
44 *
45 *  INTERRUPT LATENCY:
46 *    ready chain
47 *    select map
48 */
49
50void _Thread_Suspend(
51  Thread_Control   *the_thread
52)
53{
54  ISR_Level      level;
55  Chain_Control *ready;
56
57  ready = the_thread->ready;
58  _ISR_Disable( level );
59  the_thread->suspend_count++;
60  if ( !_States_Is_ready( the_thread->current_state ) ) {
61    the_thread->current_state =
62       _States_Set( STATES_SUSPENDED, the_thread->current_state );
63    _ISR_Enable( level );
64    return;
65  }
66
67  the_thread->current_state = STATES_SUSPENDED;
68
69  if ( _Chain_Has_only_one_node( ready ) ) {
70
71    _Chain_Initialize_empty( ready );
72    _Priority_Remove_from_bit_map( &the_thread->Priority_map );
73
74  } else
75    _Chain_Extract_unprotected( &the_thread->Object.Node );
76
77  _ISR_Flash( level );
78
79  if ( _Thread_Is_heir( the_thread ) )
80     _Thread_Calculate_heir();
81
82  if ( _Thread_Is_executing( the_thread ) )
83    _Context_Switch_necessary = TRUE;
84
85  _ISR_Enable( level );
86}
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