source: rtems/cpukit/score/src/apimutexlock.c @ 25f5730f

4.11
Last change on this file since 25f5730f was 34684573, checked in by Sebastian Huber <sebastian.huber@…>, on Mar 27, 2014 at 12:38:04 PM

score: Use thread life protection for API mutexes

This prevents that asynchronous thread deletion can lead to an unusable
allocator or once mutex.

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/**
2 * @file
3 *
4 * @brief Acquires the specified API mutex.
5 *
6 * @ingroup ScoreAPIMutex
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/apimutex.h>
23#include <rtems/score/coremuteximpl.h>
24#include <rtems/score/threadimpl.h>
25
26void _API_Mutex_Lock( API_Mutex_Control *the_mutex )
27{
28  bool previous_thread_life_protection;
29  ISR_Level level;
30
31  previous_thread_life_protection = _Thread_Set_life_protection( true );
32
33  #if defined(RTEMS_SMP)
34    _Thread_Disable_dispatch();
35  #endif
36
37  _ISR_Disable( level );
38
39  _CORE_mutex_Seize(
40    &the_mutex->Mutex,
41    _Thread_Executing,
42    the_mutex->Object.id,
43    true,
44    0,
45    level
46  );
47
48  if ( the_mutex->Mutex.nest_count == 1 ) {
49    the_mutex->previous_thread_life_protection =
50      previous_thread_life_protection;
51  }
52
53  #if defined(RTEMS_SMP)
54    _Thread_Enable_dispatch();
55  #endif
56}
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