170 lines
6.6 KiB
C
170 lines
6.6 KiB
C
/* $NetBSD: heimqueue.h,v 1.1.1.2 2011/04/14 14:08:07 elric Exp $ */
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/* NetBSD: queue.h,v 1.38 2004/04/18 14:12:05 lukem Exp */
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/* Id */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)queue.h 8.5 (Berkeley) 8/20/94
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*/
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#ifndef _HEIM_QUEUE_H_
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#define _HEIM_QUEUE_H_
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/*
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* Tail queue definitions.
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*/
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#define HEIM_TAILQ_HEAD(name, type) \
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struct name { \
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struct type *tqh_first; /* first element */ \
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struct type **tqh_last; /* addr of last next element */ \
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}
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#define HEIM_TAILQ_HEAD_INITIALIZER(head) \
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{ NULL, &(head).tqh_first }
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#define HEIM_TAILQ_ENTRY(type) \
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struct { \
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struct type *tqe_next; /* next element */ \
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struct type **tqe_prev; /* address of previous next element */ \
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}
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/*
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* Tail queue functions.
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*/
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#if defined(_KERNEL) && defined(QUEUEDEBUG)
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#define QUEUEDEBUG_HEIM_TAILQ_INSERT_HEAD(head, elm, field) \
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if ((head)->tqh_first && \
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(head)->tqh_first->field.tqe_prev != &(head)->tqh_first) \
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panic("HEIM_TAILQ_INSERT_HEAD %p %s:%d", (head), __FILE__, __LINE__);
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#define QUEUEDEBUG_HEIM_TAILQ_INSERT_TAIL(head, elm, field) \
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if (*(head)->tqh_last != NULL) \
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panic("HEIM_TAILQ_INSERT_TAIL %p %s:%d", (head), __FILE__, __LINE__);
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#define QUEUEDEBUG_HEIM_TAILQ_OP(elm, field) \
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if ((elm)->field.tqe_next && \
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(elm)->field.tqe_next->field.tqe_prev != \
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&(elm)->field.tqe_next) \
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panic("HEIM_TAILQ_* forw %p %s:%d", (elm), __FILE__, __LINE__);\
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if (*(elm)->field.tqe_prev != (elm)) \
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panic("HEIM_TAILQ_* back %p %s:%d", (elm), __FILE__, __LINE__);
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#define QUEUEDEBUG_HEIM_TAILQ_PREREMOVE(head, elm, field) \
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if ((elm)->field.tqe_next == NULL && \
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(head)->tqh_last != &(elm)->field.tqe_next) \
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panic("HEIM_TAILQ_PREREMOVE head %p elm %p %s:%d", \
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(head), (elm), __FILE__, __LINE__);
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#define QUEUEDEBUG_HEIM_TAILQ_POSTREMOVE(elm, field) \
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(elm)->field.tqe_next = (void *)1L; \
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(elm)->field.tqe_prev = (void *)1L;
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#else
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#define QUEUEDEBUG_HEIM_TAILQ_INSERT_HEAD(head, elm, field)
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#define QUEUEDEBUG_HEIM_TAILQ_INSERT_TAIL(head, elm, field)
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#define QUEUEDEBUG_HEIM_TAILQ_OP(elm, field)
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#define QUEUEDEBUG_HEIM_TAILQ_PREREMOVE(head, elm, field)
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#define QUEUEDEBUG_HEIM_TAILQ_POSTREMOVE(elm, field)
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#endif
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#define HEIM_TAILQ_INIT(head) do { \
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(head)->tqh_first = NULL; \
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(head)->tqh_last = &(head)->tqh_first; \
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} while (/*CONSTCOND*/0)
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#define HEIM_TAILQ_INSERT_HEAD(head, elm, field) do { \
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QUEUEDEBUG_HEIM_TAILQ_INSERT_HEAD((head), (elm), field) \
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if (((elm)->field.tqe_next = (head)->tqh_first) != NULL) \
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(head)->tqh_first->field.tqe_prev = \
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&(elm)->field.tqe_next; \
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else \
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(head)->tqh_last = &(elm)->field.tqe_next; \
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(head)->tqh_first = (elm); \
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(elm)->field.tqe_prev = &(head)->tqh_first; \
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} while (/*CONSTCOND*/0)
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#define HEIM_TAILQ_INSERT_TAIL(head, elm, field) do { \
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QUEUEDEBUG_HEIM_TAILQ_INSERT_TAIL((head), (elm), field) \
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(elm)->field.tqe_next = NULL; \
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(elm)->field.tqe_prev = (head)->tqh_last; \
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*(head)->tqh_last = (elm); \
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(head)->tqh_last = &(elm)->field.tqe_next; \
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} while (/*CONSTCOND*/0)
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#define HEIM_TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
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QUEUEDEBUG_HEIM_TAILQ_OP((listelm), field) \
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if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
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(elm)->field.tqe_next->field.tqe_prev = \
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&(elm)->field.tqe_next; \
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else \
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(head)->tqh_last = &(elm)->field.tqe_next; \
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(listelm)->field.tqe_next = (elm); \
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(elm)->field.tqe_prev = &(listelm)->field.tqe_next; \
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} while (/*CONSTCOND*/0)
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#define HEIM_TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
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QUEUEDEBUG_HEIM_TAILQ_OP((listelm), field) \
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(elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
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(elm)->field.tqe_next = (listelm); \
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*(listelm)->field.tqe_prev = (elm); \
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(listelm)->field.tqe_prev = &(elm)->field.tqe_next; \
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} while (/*CONSTCOND*/0)
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#define HEIM_TAILQ_REMOVE(head, elm, field) do { \
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QUEUEDEBUG_HEIM_TAILQ_PREREMOVE((head), (elm), field) \
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QUEUEDEBUG_HEIM_TAILQ_OP((elm), field) \
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if (((elm)->field.tqe_next) != NULL) \
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(elm)->field.tqe_next->field.tqe_prev = \
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(elm)->field.tqe_prev; \
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else \
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(head)->tqh_last = (elm)->field.tqe_prev; \
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*(elm)->field.tqe_prev = (elm)->field.tqe_next; \
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QUEUEDEBUG_HEIM_TAILQ_POSTREMOVE((elm), field); \
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} while (/*CONSTCOND*/0)
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#define HEIM_TAILQ_FOREACH(var, head, field) \
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for ((var) = ((head)->tqh_first); \
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(var); \
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(var) = ((var)->field.tqe_next))
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#define HEIM_TAILQ_FOREACH_REVERSE(var, head, headname, field) \
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for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last)); \
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(var); \
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(var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
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/*
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* Tail queue access methods.
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*/
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#define HEIM_TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
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#define HEIM_TAILQ_FIRST(head) ((head)->tqh_first)
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#define HEIM_TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
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#define HEIM_TAILQ_LAST(head, headname) \
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(*(((struct headname *)((head)->tqh_last))->tqh_last))
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#define HEIM_TAILQ_PREV(elm, headname, field) \
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(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
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#endif /* !_HEIM_QUEUE_H_ */
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