source: rtems/cpukit/score/src/threadqfirst.c @ fa6b0f5

4.104.114.84.95
Last change on this file since fa6b0f5 was a8eed23, checked in by Ralf Corsepius <ralf.corsepius@…>, on 01/27/05 at 05:57:05

Include config.h.

  • Property mode set to 100644
File size: 1.4 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#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
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(
43  Thread_queue_Control *the_thread_queue
44)
45{
46  Thread_Control *the_thread;
47
48  switch ( the_thread_queue->discipline ) {
49    case THREAD_QUEUE_DISCIPLINE_FIFO:
50      the_thread = _Thread_queue_First_fifo( the_thread_queue );
51      break;
52    case THREAD_QUEUE_DISCIPLINE_PRIORITY:
53      the_thread = _Thread_queue_First_priority( the_thread_queue );
54      break;
55    default:              /* this is only to prevent warnings */
56      the_thread = NULL;
57      break;
58  }
59
60  return the_thread;
61}
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