source: rtems/cpukit/score/src/userextremoveset.c @ 2548d14

5
Last change on this file since 2548d14 was 709f38a, checked in by Sebastian Huber <sebastian.huber@…>, on 04/13/16 at 04:48:58

score: Use chain iterator for user extensions

Add a lock and use a chain iterator for safe iteration during concurrent
user extension addition and removal.

Ensure that dynamically added thread delete and fatal extensions are
called in reverse order.

Update #2555.
Update #2692.

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup ScoreUserExt
5 *
6 * @brief User Extension Handler implementation.
7 */
8
9/*
10 *  COPYRIGHT (c) 1989-2007.
11 *  On-Line Applications Research Corporation (OAR).
12 *
13 *  The license and distribution terms for this file may be
14 *  found in the file LICENSE in this distribution or at
15 *  http://www.rtems.org/license/LICENSE.
16 */
17
18#if HAVE_CONFIG_H
19#include "config.h"
20#endif
21
22#include <rtems/score/userextimpl.h>
23#include <rtems/score/percpu.h>
24
25void _User_extensions_Remove_set (
26  User_extensions_Control  *the_extension
27)
28{
29  ISR_lock_Context lock_context;
30
31  _User_extensions_Acquire( &lock_context );
32  _Chain_Iterator_registry_update(
33    &_User_extensions_List.Iterators,
34    &the_extension->Node
35  );
36  _Chain_Extract_unprotected( &the_extension->Node );
37  _User_extensions_Release( &lock_context );
38
39  /*
40   * If a switch handler is present, remove it.
41   */
42
43  if ( the_extension->Callouts.thread_switch != NULL ) {
44    ISR_Level level;
45
46    _Per_CPU_Acquire_all( level );
47    _Chain_Extract_unprotected( &the_extension->Switch.Node );
48    _Per_CPU_Release_all( level );
49  }
50}
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