source: rtems/cpukit/score/src/threadqtimeout.c @ a6eef8b

Last change on this file since a6eef8b was a6eef8b, checked in by Joel Sherrill <joel.sherrill@…>, on 09/04/03 at 18:52:48

2003-09-04 Joel Sherrill <joel@…>

  • apiext.c, chain.c, coremsg.c, coremsgbroadcast.c, coremsgclose.c, coremsgflush.c, coremsgflushsupp.c, coremsgflushwait.c, coremsginsert.c, coremsgseize.c, coremsgsubmit.c, coremutex.c, coremutexflush.c, coremutexseize.c, coremutexsurrender.c, coresem.c, coresemflush.c, coresemseize.c, coresemsurrender.c, coretod.c, coretodset.c, coretodtickle.c, coretodtoseconds.c, coretodvalidate.c, heap.c, heapallocate.c, heapextend.c, heapfree.c, heapgetinfo.c, heapsizeofuserarea.c, heapwalk.c, interr.c, isr.c, mpci.c, object.c, objectallocate.c, objectallocatebyindex.c, objectclearname.c, objectcomparenameraw.c, objectcomparenamestring.c, objectcopynameraw.c, objectcopynamestring.c, objectextendinformation.c, objectfree.c, objectget.c, objectgetbyindex.c, objectgetisr.c, objectgetnext.c, objectgetnoprotection.c, objectinitializeinformation.c, objectmp.c, objectnametoid.c, objectshrinkinformation.c, thread.c, threadchangepriority.c, threadclearstate.c, threadclose.c, threadcreateidle.c, threaddelayended.c, threaddispatch.c, threadevaluatemode.c, threadget.c, threadhandler.c, threadidlebody.c, threadinitialize.c, threadloadenv.c, threadmp.c, threadq.c, threadqdequeue.c, threadqdequeuefifo.c, threadqdequeuepriority.c, threadqenqueue.c, threadqenqueuefifo.c, threadqenqueuepriority.c, threadqextract.c, threadqextractfifo.c, threadqextractpriority.c, threadqextractwithproxy.c, threadqfirst.c, threadqfirstfifo.c, threadqfirstpriority.c, threadqflush.c, threadqtimeout.c, threadready.c, threadreset.c, threadresettimeslice.c, threadrestart.c, threadresume.c, threadrotatequeue.c, threadsetpriority.c, threadsetstate.c, threadsettransient.c, threadstackallocate.c, threadstackfree.c, threadstart.c, threadstartmultitasking.c, threadsuspend.c, threadtickletimeslice.c, threadyieldprocessor.c, userext.c, watchdog.c, watchdogadjust.c, watchdoginsert.c, watchdogremove.c, watchdogtickle.c, wkspace.c: URL for license changed.
  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 *  Thread Queue Handler
3 *
4 *
5 *  COPYRIGHT (c) 1989-1999.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#include <rtems/system.h>
16#include <rtems/score/chain.h>
17#include <rtems/score/isr.h>
18#include <rtems/score/object.h>
19#include <rtems/score/states.h>
20#include <rtems/score/thread.h>
21#include <rtems/score/threadq.h>
22#include <rtems/score/tqdata.h>
23
24/*PAGE
25 *
26 *  _Thread_queue_Timeout
27 *
28 *  This routine processes a thread which timeouts while waiting on
29 *  a thread queue. It is called by the watchdog handler.
30 *
31 *  Input parameters:
32 *    id - thread id
33 *
34 *  Output parameters: NONE
35 */
36
37void _Thread_queue_Timeout(
38  Objects_Id  id,
39  void       *ignored
40)
41{
42  Thread_Control       *the_thread;
43  Thread_queue_Control *the_thread_queue;
44  Objects_Locations     location;
45
46  the_thread = _Thread_Get( id, &location );
47  switch ( location ) {
48    case OBJECTS_ERROR:
49    case OBJECTS_REMOTE:  /* impossible */
50      break;
51    case OBJECTS_LOCAL:
52      the_thread_queue = the_thread->Wait.queue;
53
54      /*
55       *  If the_thread_queue is not synchronized, then it is either
56       *  "nothing happened", "timeout", or "satisfied".   If the_thread
57       *  is the executing thread, then it is in the process of blocking
58       *  and it is the thread which is responsible for the synchronization
59       *  process.
60       *
61       *  If it is not satisfied, then it is "nothing happened" and
62       *  this is the "timeout" transition.  After a request is satisfied,
63       *  a timeout is not allowed to occur.
64       */
65
66      if ( the_thread_queue->sync_state != THREAD_QUEUE_SYNCHRONIZED &&
67           _Thread_Is_executing( the_thread ) ) {
68        if ( the_thread_queue->sync_state != THREAD_QUEUE_SATISFIED )
69          the_thread_queue->sync_state = THREAD_QUEUE_TIMEOUT;
70      } else {
71        the_thread->Wait.return_code = the_thread->Wait.queue->timeout_status;
72        _Thread_queue_Extract( the_thread->Wait.queue, the_thread );
73      }
74      _Thread_Unnest_dispatch();
75      break;
76  }
77}
78
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