source: rtems/cpukit/posix/src/mutexsetprioceiling.c @ 860c34e

4.104.114.9
Last change on this file since 860c34e was 860c34e, checked in by Glenn Humphrey <glenn.humphrey@…>, on Nov 30, 2007 at 8:34:13 PM

2007-11-30 Glenn Humphrey <glenn.humphrey@…>

  • posix/include/rtems/posix/mutex.h, posix/include/rtems/posix/semaphore.h, posix/src/cancel.c, posix/src/conddestroy.c, posix/src/condsignalsupp.c, posix/src/condwaitsupp.c, posix/src/keydelete.c, posix/src/keygetspecific.c, posix/src/keysetspecific.c, posix/src/mqueueclose.c, posix/src/mqueuegetattr.c, posix/src/mqueuenotify.c, posix/src/mqueuerecvsupp.c, posix/src/mqueuesendsupp.c, posix/src/mqueuesetattr.c, posix/src/mqueuetranslatereturncode.c, posix/src/mutexdestroy.c, posix/src/mutexgetprioceiling.c, posix/src/mutexinit.c, posix/src/mutexlocksupp.c, posix/src/mutexsetprioceiling.c, posix/src/mutexunlock.c, posix/src/pbarrierdestroy.c, posix/src/pbarriertranslatereturncode.c, posix/src/pbarrierwait.c, posix/src/prwlockdestroy.c, posix/src/prwlockrdlock.c, posix/src/prwlocktimedrdlock.c, posix/src/prwlocktimedwrlock.c, posix/src/prwlocktranslatereturncode.c, posix/src/prwlocktryrdlock.c, posix/src/prwlocktrywrlock.c, posix/src/prwlockunlock.c, posix/src/prwlockwrlock.c, posix/src/pspindestroy.c, posix/src/pspinlock.c, posix/src/pspinlocktranslatereturncode.c, posix/src/pspintrylock.c, posix/src/pspinunlock.c, posix/src/pthreaddetach.c, posix/src/pthreadequal.c, posix/src/pthreadgetschedparam.c, posix/src/pthreadjoin.c, posix/src/pthreadkill.c, posix/src/pthreadsetschedparam.c, posix/src/ptimer1.c, posix/src/semaphorewaitsupp.c, posix/src/semclose.c, posix/src/semdestroy.c, posix/src/semgetvalue.c, posix/src/sempost.c, posix/src/types.c, rtems/src/msgqtranslatereturncode.c, rtems/src/semobtain.c, rtems/src/timerfireafter.c, score/include/rtems/system.h, score/include/rtems/score/corebarrier.h, score/include/rtems/score/coremsg.h, score/include/rtems/score/coremutex.h, score/include/rtems/score/coresem.h: Restructed to move the OBJECTS_LOCAL case to the top of the switch statement and eliminate the fall-through return of POSIX_BOTTOM_REACHED. These changes produced simplier assembly code and allowed for complete test coverage. Also applied some consistency to the functions that translate the core status codes to POSIX status codes.
  • posix/src/mutextranslatereturncode.c, posix/src/semaphoretranslatereturncode.c: New files.
  • posix/src/mutexfromcorestatus.c: Removed.
  • Property mode set to 100644
File size: 1.7 KB
Line 
1/*
2 *  $Id$
3 */
4
5#if HAVE_CONFIG_H
6#include "config.h"
7#endif
8
9#include <errno.h>
10#include <pthread.h>
11
12#include <rtems/system.h>
13#include <rtems/score/coremutex.h>
14#include <rtems/score/watchdog.h>
15#if defined(RTEMS_MULTIPROCESSING)
16#include <rtems/score/mpci.h>
17#endif
18#include <rtems/posix/mutex.h>
19#include <rtems/posix/priority.h>
20#include <rtems/posix/time.h>
21
22/*PAGE
23 *
24 *  13.6.2 Change the Priority Ceiling of a Mutex, P1003.1c/Draft 10, p. 131
25 */
26
27int pthread_mutex_setprioceiling(
28  pthread_mutex_t   *mutex,
29  int                prioceiling,
30  int               *old_ceiling
31)
32{
33  register POSIX_Mutex_Control *the_mutex;
34  Objects_Locations             location;
35  Priority_Control              the_priority;
36  int                           status;
37
38  if ( !old_ceiling )
39    return EINVAL;
40
41  if ( !_POSIX_Priority_Is_valid( prioceiling ) )
42    return EINVAL;
43
44  the_priority = _POSIX_Priority_To_core( prioceiling );
45
46  /*
47   *  Must acquire the mutex before we can change it's ceiling
48   */
49
50  status = pthread_mutex_lock( mutex );
51  if ( status )
52    return status;
53
54  the_mutex = _POSIX_Mutex_Get( mutex, &location );
55  switch ( location ) {
56
57    case OBJECTS_LOCAL:
58      *old_ceiling = _POSIX_Priority_From_core(
59        the_mutex->Mutex.Attributes.priority_ceiling
60      );
61      the_mutex->Mutex.Attributes.priority_ceiling = the_priority;
62      _CORE_mutex_Surrender(
63        &the_mutex->Mutex,
64        the_mutex->Object.id,
65#if defined(RTEMS_MULTIPROCESSING)
66        _POSIX_Threads_mutex_MP_support
67#else
68        NULL
69#endif
70      );
71      _Thread_Enable_dispatch();
72      return 0;
73
74#if defined(RTEMS_MULTIPROCESSING)
75    case OBJECTS_REMOTE:  /* impossible to get here */
76#endif
77    case OBJECTS_ERROR:
78      break;
79  }
80
81  return EINVAL;
82}
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