85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
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/* $NetBSD: _que.c,v 1.1 2001/08/12 08:35:34 jdolecek Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Use <sys/queue.h> macros for new code, queue functions provided here
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* are obsolete. Once the remaining code using this would be converted
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* to use <sys/queue.h>, this would be removed.
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*/
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#include <sys/types.h>
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#include <sys/systm.h>
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struct queue {
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struct queue *q_next, *q_prev;
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};
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/*
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* insert an element into a queue
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*/
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void
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_insque(v1, v2)
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void *v1;
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void *v2;
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{
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struct queue *elem = v1, *head = v2;
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struct queue *next;
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next = head->q_next;
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elem->q_next = next;
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head->q_next = elem;
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elem->q_prev = head;
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next->q_prev = elem;
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}
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/*
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* remove an element from a queue
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*/
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void
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_remque(v)
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void *v;
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{
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struct queue *elem = v;
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struct queue *next, *prev;
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next = elem->q_next;
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prev = elem->q_prev;
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next->q_prev = prev;
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prev->q_next = next;
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elem->q_prev = 0;
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}
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