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Ship a compat queue.h for older systems without any TAILQ support.
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Roy Marples
parent
fbc3019cc1
commit
4f6c549e86
164
compat/queue.h
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164
compat/queue.h
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/* $NetBSD: queue.h,v 1.65 2013/12/25 17:19:34 christos Exp $ */
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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 COMPAT_QUEUE_H
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#define COMPAT_QUEUE_H
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/*
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* Tail queue definitions.
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*/
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#ifndef TAILQ_HEAD
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#define _TAILQ_HEAD(name, type, qual) \
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struct name { \
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qual type *tqh_first; /* first element */ \
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qual type *qual *tqh_last; /* addr of last next element */ \
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}
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#define TAILQ_HEAD(name, type) _TAILQ_HEAD(name, struct type,)
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#define TAILQ_HEAD_INITIALIZER(head) \
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{ TAILQ_END(head), &(head).tqh_first }
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#define _TAILQ_ENTRY(type, qual) \
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struct { \
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qual type *tqe_next; /* next element */ \
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qual type *qual *tqe_prev; /* address of previous next element */\
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}
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#define TAILQ_ENTRY(type) _TAILQ_ENTRY(struct type,)
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/*
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* Tail queue access methods.
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*/
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#define TAILQ_FIRST(head) ((head)->tqh_first)
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#define TAILQ_END(head) (NULL)
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#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
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#define TAILQ_LAST(head, headname) \
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(*(((struct headname *)((head)->tqh_last))->tqh_last))
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#define TAILQ_PREV(elm, headname, field) \
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(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
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#define TAILQ_EMPTY(head) (TAILQ_FIRST(head) == TAILQ_END(head))
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#define TAILQ_FOREACH(var, head, field) \
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for ((var) = ((head)->tqh_first); \
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(var) != TAILQ_END(head); \
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(var) = ((var)->field.tqe_next))
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#define 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) != TAILQ_END(head); \
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(var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
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#define TAILQ_INIT(head) do { \
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(head)->tqh_first = TAILQ_END(head); \
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(head)->tqh_last = &(head)->tqh_first; \
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} while (/*CONSTCOND*/0)
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#define TAILQ_INSERT_HEAD(head, elm, field) do { \
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if (((elm)->field.tqe_next = (head)->tqh_first) != TAILQ_END(head))\
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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 TAILQ_INSERT_TAIL(head, elm, field) do { \
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(elm)->field.tqe_next = TAILQ_END(head); \
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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 TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
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if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != \
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TAILQ_END(head)) \
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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 TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
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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 TAILQ_REMOVE(head, elm, field) do { \
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if (((elm)->field.tqe_next) != TAILQ_END(head)) \
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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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} while (/*CONSTCOND*/0)
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#define TAILQ_REPLACE(head, elm, elm2, field) do { \
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if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != \
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TAILQ_END(head)) \
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(elm2)->field.tqe_next->field.tqe_prev = \
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&(elm2)->field.tqe_next; \
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else \
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(head)->tqh_last = &(elm2)->field.tqe_next; \
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(elm2)->field.tqe_prev = (elm)->field.tqe_prev; \
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*(elm2)->field.tqe_prev = (elm2); \
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} while (/*CONSTCOND*/0)
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#endif /* !TAILQ_HEAD */
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#ifndef TAILQ_FOREACH_SAFE
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#define TAILQ_FOREACH_SAFE(var, head, field, next) \
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for ((var) = TAILQ_FIRST(head); \
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(var) != TAILQ_END(head) && \
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((next) = TAILQ_NEXT(var, field), 1); (var) = (next))
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#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, prev) \
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for ((var) = TAILQ_LAST((head), headname); \
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(var) != TAILQ_END(head) && \
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((prev) = TAILQ_PREV((var), headname, field), 1); (var) = (prev))
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#endif /* !TAILQ_FOREACH_SAFE */
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#ifndef TAILQ_CONCAT
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#define TAILQ_CONCAT(head1, head2, field) do { \
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if (!TAILQ_EMPTY(head2)) { \
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*(head1)->tqh_last = (head2)->tqh_first; \
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(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
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(head1)->tqh_last = (head2)->tqh_last; \
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TAILQ_INIT((head2)); \
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} \
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} while (/*CONSTCOND*/0)
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#endif /* !TAILQ_CONCAT */
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#endif /* !COMAPT_QUEUE_H */
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26
configure
vendored
26
configure
vendored
@ -548,19 +548,6 @@ EOF
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echo "$TAILQ_FOREACH_SAFE"
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rm -f _queue.c _queue
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fi
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if [ "$TAILQ_FOREACH_SAFE" = no ]; then
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cat <<EOF >>$CONFIG_H
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#define TAILQ_FOREACH_SAFE(var, head, field, next) \\
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for ((var) = TAILQ_FIRST((head)); \\
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(var) && ((next) = TAILQ_NEXT((var), field), 1); \\
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(var) = (next))
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#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, prev) \\
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for ((var) = TAILQ_LAST((head), headname); \\
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(var) && ((prev) = TAILQ_PREV((var), headname, field), 1); \\
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(var) = (prev))
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EOF
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fi
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if [ -z "$TAILQ_CONCAT" ]; then
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printf "Testing for TAILQ_CONCAT ..."
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cat <<EOF >_queue.c
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@ -580,17 +567,8 @@ EOF
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echo "$TAILQ_CONCAT"
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rm -f _queue.c _queue
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fi
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if [ "$TAILQ_CONCAT" = no ]; then
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cat <<EOF >>$CONFIG_H
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#define TAILQ_CONCAT(head1, head2, field) do { \\
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if (!TAILQ_EMPTY(head2)) { \\
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*(head1)->tqh_last = (head2)->tqh_first; \\
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(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \\
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(head1)->tqh_last = (head2)->tqh_last; \\
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TAILQ_INIT((head2)); \\
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} \\
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} while (/*CONSTCOND*/0)
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EOF
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if [ "$TAILQ_FOREACH_SAFE" = no -o "$TAILQ_CONCAT" = no ]; then
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echo "#include \"compat/queue.h\"">>$CONFIG_H
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fi
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if [ -z "$POSIX_SPAWN" ]; then
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