source: rtems/cpukit/score/src/threadclearstate.c @ 6af81435

4.104.114.84.95
Last change on this file since 6af81435 was 05df0a8, checked in by Joel Sherrill <joel.sherrill@…>, on 05/17/99 at 20:41:13

Thread Handler split into multiple files. Eventually, as RTEMS is
split into one function per file, this will decrease the size of executables.

  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2 *  Thread Handler
3 *
4 *
5 *  COPYRIGHT (c) 1989-1998.
6 *  On-Line Applications Research Corporation (OAR).
7 *  Copyright assigned to U.S. Government, 1994.
8 *
9 *  The license and distribution terms for this file may be
10 *  found in found in the file LICENSE in this distribution or at
11 *  http://www.OARcorp.com/rtems/license.html.
12 *
13 *  $Id$
14 */
15
16#include <rtems/system.h>
17#include <rtems/score/apiext.h>
18#include <rtems/score/context.h>
19#include <rtems/score/interr.h>
20#include <rtems/score/isr.h>
21#include <rtems/score/object.h>
22#include <rtems/score/priority.h>
23#include <rtems/score/states.h>
24#include <rtems/score/sysstate.h>
25#include <rtems/score/thread.h>
26#include <rtems/score/threadq.h>
27#include <rtems/score/userext.h>
28#include <rtems/score/wkspace.h>
29
30/*PAGE
31 *
32 *  _Thread_Clear_state
33 *
34 *  This kernel routine clears the appropriate states in the
35 *  requested thread.  The thread ready chain is adjusted if
36 *  necessary and the Heir thread is set accordingly.
37 *
38 *  Input parameters:
39 *    the_thread - pointer to thread control block
40 *    state      - state set to clear
41 *
42 *  Output parameters:  NONE
43 *
44 *  INTERRUPT LATENCY:
45 *    priority map
46 *    select heir
47 */
48
49
50void _Thread_Clear_state(
51  Thread_Control *the_thread,
52  States_Control  state
53)
54{
55  ISR_Level       level;
56  States_Control  current_state;
57
58  _ISR_Disable( level );
59    current_state = the_thread->current_state;
60   
61    if ( current_state & state ) {
62      current_state =
63      the_thread->current_state = _States_Clear( state, current_state );
64
65      if ( _States_Is_ready( current_state ) ) {
66
67        _Priority_Add_to_bit_map( &the_thread->Priority_map );
68
69        _Chain_Append_unprotected(the_thread->ready, &the_thread->Object.Node);
70
71        _ISR_Flash( level );
72
73        if ( the_thread->current_priority < _Thread_Heir->current_priority ) {
74          _Thread_Heir = the_thread;
75          if ( _Thread_Executing->is_preemptible ||
76               the_thread->current_priority == 0 )
77            _Context_Switch_necessary = TRUE;
78        }
79      }
80  }
81  _ISR_Enable( level );
82}
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