source: rtems/cpukit/score/src/threadqdequeue.c @ dfbfa2b0

4.104.114.84.95
Last change on this file since dfbfa2b0 was dfbfa2b0, checked in by Joel Sherrill <joel.sherrill@…>, on Nov 2, 1999 at 8:36:11 PM

Split threadq.c into multiple files.

  • Property mode set to 100644
File size: 1.5 KB
Line 
1/*
2 *  Thread Queue Handler
3 *
4 *
5 *  COPYRIGHT (c) 1989-1998.
6 *  On-Line Applications Research Corporation (OAR).
7 *  Copyright assigned to U.S. Government, 1994.
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.OARcorp.com/rtems/license.html.
12 *
13 *  $Id$
14 */
15
16#include <rtems/system.h>
17#include <rtems/score/chain.h>
18#include <rtems/score/isr.h>
19#include <rtems/score/object.h>
20#include <rtems/score/states.h>
21#include <rtems/score/thread.h>
22#include <rtems/score/threadq.h>
23#include <rtems/score/tqdata.h>
24
25/*PAGE
26 *
27 *  _Thread_queue_Dequeue
28 *
29 *  This routine removes a thread from the specified threadq.  If the
30 *  threadq discipline is FIFO, it unblocks a thread, and cancels its
31 *  timeout timer.  Priority discipline is processed elsewhere.
32 *
33 *  Input parameters:
34 *    the_thread_queue - pointer to threadq
35 *
36 *  Output parameters:
37 *    returns - thread dequeued or NULL
38 *
39 *  INTERRUPT LATENCY:
40 *    check sync
41 */
42
43Thread_Control *_Thread_queue_Dequeue(
44  Thread_queue_Control *the_thread_queue
45)
46{
47  Thread_Control *the_thread;
48
49  switch ( the_thread_queue->discipline ) {
50    case THREAD_QUEUE_DISCIPLINE_FIFO:
51      the_thread = _Thread_queue_Dequeue_fifo( the_thread_queue );
52      break;
53    case THREAD_QUEUE_DISCIPLINE_PRIORITY:
54      the_thread = _Thread_queue_Dequeue_priority( the_thread_queue );
55      break;
56    default:              /* this is only to prevent warnings */
57      the_thread = NULL;
58      break;
59  }
60
61  return( the_thread );
62}
63
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