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/*
* threadqueue.c
*
* $Id: thread_queue.c,v 1.1.1.1 2006/04/11 17:56:16 source Exp $
*
* Thread Queues
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#include "thread_int.h"
DK_INLINE void
thread_queue_init (thread_queue_t *thq)
{
LISTINIT (&thq->thq_head, thr_next, thr_prev);
thq->thq_count = 0;
}
/*
* Add a thread to the end of a queue
*/
DK_INLINE void
thread_queue_to (thread_queue_t *thq, thread_t *thr)
{
thq->thq_count++;
LISTPUTBEFORE (&thq->thq_head, &thr->thr_hdr, thr_next, thr_prev);
}
/*
* Remove a thread from a queue
*/
DK_INLINE thread_t *
thread_queue_remove (thread_queue_t *thq, thread_t *thr)
{
thq->thq_count--;
LISTDELETE (&thr->thr_hdr, thr_next, thr_prev);
return thr;
}
/*
* Remove a thread from the head of a queue
*/
DK_INLINE thread_t *
thread_queue_from (thread_queue_t *thq)
{
if (thq->thq_count == 0)
return NULL;
return thread_queue_remove (thq, (thread_t *) thq->thq_head.thr_next);
}
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