source: rtems/cpukit/posix/src/condwaitsupp.c @ 0e87deaa

4.104.114.95
Last change on this file since 0e87deaa was 0e87deaa, checked in by Joel Sherrill <joel.sherrill@…>, on 10/26/07 at 20:19:02

2007-10-26 Joel Sherrill <joel.sherrill@…>

  • itron/src/can_wup.c, itron/src/chg_pri.c, itron/src/del_mbf.c, itron/src/del_mbx.c, itron/src/del_sem.c, itron/src/del_tsk.c, itron/src/frsm_tsk.c, itron/src/ref_mbf.c, itron/src/ref_mbx.c, itron/src/ref_sem.c, itron/src/ref_tsk.c, itron/src/rel_wai.c, itron/src/rsm_tsk.c, itron/src/sig_sem.c, itron/src/snd_mbx.c, itron/src/sta_tsk.c, itron/src/sus_tsk.c, itron/src/ter_tsk.c, itron/src/trcv_mbf.c, itron/src/trcv_mbx.c, itron/src/tsnd_mbf.c, itron/src/twai_sem.c, posix/src/cancel.c, posix/src/conddestroy.c, posix/src/condinit.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/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/pbarrierwait.c, posix/src/prwlockdestroy.c, posix/src/prwlockrdlock.c, posix/src/prwlocktimedrdlock.c, posix/src/prwlocktimedwrlock.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/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/barrierdelete.c, rtems/src/barrierrelease.c, rtems/src/barrierwait.c, rtems/src/dpmemdelete.c, rtems/src/dpmemexternal2internal.c, rtems/src/dpmeminternal2external.c, rtems/src/eventsend.c, rtems/src/eventtimeout.c, rtems/src/msgqbroadcast.c, rtems/src/msgqdelete.c, rtems/src/msgqflush.c, rtems/src/msgqgetnumberpending.c, rtems/src/msgqreceive.c, rtems/src/msgqsend.c, rtems/src/msgqurgent.c, rtems/src/partdelete.c, rtems/src/partgetbuffer.c, rtems/src/partreturnbuffer.c, rtems/src/ratemoncancel.c, rtems/src/ratemondelete.c, rtems/src/ratemongetstatistics.c, rtems/src/ratemongetstatus.c, rtems/src/ratemonperiod.c, rtems/src/ratemonresetstatistics.c, rtems/src/ratemontimeout.c, rtems/src/regiondelete.c, rtems/src/regionextend.c, rtems/src/regiongetfreeinfo.c, rtems/src/regiongetinfo.c, rtems/src/regiongetsegment.c, rtems/src/regiongetsegmentsize.c, rtems/src/regionresizesegment.c, rtems/src/regionreturnsegment.c, rtems/src/semdelete.c, rtems/src/semflush.c, rtems/src/semobtain.c, rtems/src/semrelease.c, rtems/src/signalsend.c, rtems/src/taskdelete.c, rtems/src/taskgetnote.c, rtems/src/taskissuspended.c, rtems/src/taskrestart.c, rtems/src/taskresume.c, rtems/src/tasksetnote.c, rtems/src/tasksetpriority.c, rtems/src/taskstart.c, rtems/src/tasksuspend.c, rtems/src/taskvariableadd.c, rtems/src/taskvariabledelete.c, rtems/src/taskvariableget.c, rtems/src/timercancel.c, rtems/src/timerdelete.c, rtems/src/timerfireafter.c, rtems/src/timerfirewhen.c, rtems/src/timergetinfo.c, rtems/src/timerreset.c, rtems/src/timerserverfireafter.c, rtems/src/timerserverfirewhen.c, sapi/src/extensiondelete.c, score/include/rtems/score/object.h, score/src/corerwlocktimeout.c, score/src/mpci.c, score/src/objectgetnameasstring.c, score/src/threaddelayended.c, score/src/threadqtimeout.c: When multiprocessing is disabled, do not even allow the constant OBJECTS_REMOTE to appear in the source. Even at -O2, the presence of a case OBJECTS_REMOTE in each id->pointer _Objects_Get switch results in the generation of binary code which can NOT be reached.
  • Property mode set to 100644
File size: 2.6 KB
Line 
1/*
2 *  $Id$
3 */
4
5#if HAVE_CONFIG_H
6#include "config.h"
7#endif
8
9#include <pthread.h>
10#include <errno.h>
11
12#include <rtems/system.h>
13#include <rtems/score/object.h>
14#include <rtems/score/states.h>
15#include <rtems/score/watchdog.h>
16#include <rtems/posix/cond.h>
17#include <rtems/posix/time.h>
18#include <rtems/posix/mutex.h>
19
20/*PAGE
21 *
22 *  _POSIX_Condition_variables_Wait_support
23 *
24 *  A support routine which implements guts of the blocking, non-blocking, and
25 *  timed wait version of condition variable wait routines.
26 */
27
28int _POSIX_Condition_variables_Wait_support(
29  pthread_cond_t            *cond,
30  pthread_mutex_t           *mutex,
31  Watchdog_Interval          timeout,
32  boolean                    already_timedout
33)
34{
35  register POSIX_Condition_variables_Control *the_cond;
36  Objects_Locations                           location;
37  int                                         status;
38  int                                         mutex_status;
39
40  if ( !_POSIX_Mutex_Get( mutex, &location ) ) {
41     return EINVAL;
42  }
43
44  _Thread_Unnest_dispatch();
45
46  the_cond = _POSIX_Condition_variables_Get( cond, &location );
47  switch ( location ) {
48#if defined(RTEMS_MULTIPROCESSING)
49    case OBJECTS_REMOTE:
50      _Thread_Dispatch();
51      return POSIX_MP_NOT_IMPLEMENTED();
52      return EINVAL;
53#endif
54    case OBJECTS_ERROR:
55      return EINVAL;
56    case OBJECTS_LOCAL:
57
58      if ( the_cond->Mutex && ( the_cond->Mutex != *mutex ) ) {
59        _Thread_Enable_dispatch();
60        return EINVAL;
61      }
62
63      (void) pthread_mutex_unlock( mutex );
64/* XXX ignore this for now  since behavior is undefined
65      if ( mutex_status ) {
66        _Thread_Enable_dispatch();
67        return EINVAL;
68      }
69*/
70
71      if ( !already_timedout ) {
72        the_cond->Mutex = *mutex;
73
74        _Thread_queue_Enter_critical_section( &the_cond->Wait_queue );
75        _Thread_Executing->Wait.return_code = 0;
76        _Thread_Executing->Wait.queue       = &the_cond->Wait_queue;
77        _Thread_Executing->Wait.id          = *cond;
78
79        _Thread_queue_Enqueue( &the_cond->Wait_queue, timeout );
80
81        _Thread_Enable_dispatch();
82
83        /*
84         *  Switch ourself out because we blocked as a result of the
85         *  _Thread_queue_Enqueue.
86         */
87
88        status = _Thread_Executing->Wait.return_code;
89        if ( status && status != ETIMEDOUT )
90          return status;
91
92      } else {
93        _Thread_Enable_dispatch();
94        status = ETIMEDOUT;
95      }
96
97      /*
98       *  When we get here the dispatch disable level is 0.
99       */
100
101      mutex_status = pthread_mutex_lock( mutex );
102      if ( mutex_status )
103        return EINVAL;
104
105      return status;
106  }
107  return POSIX_BOTTOM_REACHED();
108}
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