source: rtems/cpukit/score/src/threadqfirstpriority.c @ 749d64a

4.104.115
Last change on this file since 749d64a was 3168deaa, checked in by Joel Sherrill <joel.sherrill@…>, on 01/22/08 at 18:28:53

2008-01-22 Joel Sherrill <joel.sherrill@…>

  • rtems/include/rtems/rtems/event.h, rtems/inline/rtems/rtems/eventset.inl, rtems/src/event.c, rtems/src/eventseize.c, rtems/src/eventsurrender.c, rtems/src/eventtimeout.c, score/Makefile.am, score/preinstall.am, score/include/rtems/score/interr.h, score/include/rtems/score/thread.h, score/include/rtems/score/threadq.h, score/include/rtems/score/tqdata.h, score/inline/rtems/score/threadq.inl, score/inline/rtems/score/tqdata.inl, score/src/threadq.c, score/src/threadqdequeue.c, score/src/threadqdequeuefifo.c, score/src/threadqdequeuepriority.c, score/src/threadqenqueue.c, score/src/threadqenqueuefifo.c, score/src/threadqenqueuepriority.c, score/src/threadqextract.c, score/src/threadqextractfifo.c, score/src/threadqextractpriority.c, score/src/threadqextractwithproxy.c, score/src/threadqfirst.c, score/src/threadqfirstfifo.c, score/src/threadqfirstpriority.c, score/src/threadqflush.c, score/src/threadqrequeue.c, score/src/threadqtimeout.c: Refactor thread queue enqueue and event blocking synchronization critical sections. This resulted in three copies of essentially the same hard to test critical section code becoming the one shared routine _Thread_blocking_operation_Cancel. In addition, the thread queue and event code now share a common synchronization enumerated type. Along the way, switches were reworked to eliminate dead code generated by gcc and comments and copyrights were updated.
  • score/include/rtems/score/threadsync.h, score/src/threadblockingoperationcancel.c: New files.
  • Property mode set to 100644
File size: 1.2 KB
Line 
1/*
2 *  Thread Queue Handler
3 *
4 *
5 *  COPYRIGHT (c) 1989-2008.
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#if HAVE_CONFIG_H
16#include "config.h"
17#endif
18
19#include <rtems/system.h>
20#include <rtems/score/chain.h>
21#include <rtems/score/isr.h>
22#include <rtems/score/object.h>
23#include <rtems/score/states.h>
24#include <rtems/score/thread.h>
25#include <rtems/score/threadq.h>
26#include <rtems/score/tqdata.h>
27
28/*PAGE
29 *
30 *  _Thread_queue_First_priority
31 *
32 *  This routines returns a pointer to the first thread on the
33 *  specified threadq.
34 *
35 *  Input parameters:
36 *    the_thread_queue - pointer to thread queue
37 *
38 *  Output parameters:
39 *    returns - first thread or NULL
40 */
41
42Thread_Control *_Thread_queue_First_priority (
43  Thread_queue_Control *the_thread_queue
44)
45{
46  uint32_t   index;
47
48  for( index=0 ;
49       index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ;
50       index++ ) {
51    if ( !_Chain_Is_empty( &the_thread_queue->Queues.Priority[ index ] ) )
52      return (Thread_Control *)
53        the_thread_queue->Queues.Priority[ index ].first;
54  }
55  return NULL;
56}
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