source: rtems/cpukit/score/src/threadsuspend.c @ 2728d9cf

4.104.114.84.95
Last change on this file since 2728d9cf was 08311cc3, checked in by Joel Sherrill <joel.sherrill@…>, on 11/17/99 at 17:51:34

Updated copyright notice.

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