469 lines
14 KiB
C
469 lines
14 KiB
C
/* $NetBSD: queue.h,v 1.8 2009/03/02 13:54:56 joerg 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. 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 University of
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* California, Berkeley and its contributors.
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* 4. 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 _NBCOMPAT_QUEUE_H
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#define _NBCOMPAT_QUEUE_H
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#if HAVE_SYS_QUEUE_H
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# include <sys/queue.h>
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#endif
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/*
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* Provide any macros missing from <sys/queue.h>.
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*/
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#ifndef LIST_HEAD
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#define LIST_HEAD(name, type) \
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struct name { \
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struct type *lh_first; /* first element */ \
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}
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#endif
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#ifndef LIST_HEAD_INITIALIZER
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#define LIST_HEAD_INITIALIZER(head) \
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{ NULL }
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#endif
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#ifndef LIST_ENTRY
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#define LIST_ENTRY(type) \
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struct { \
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struct type *le_next; /* next element */ \
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struct type **le_prev; /* address of previous next element */ \
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}
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#endif
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#ifndef LIST_INIT
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#define LIST_INIT(head) do { \
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(head)->lh_first = NULL; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef LIST_INSERT_AFTER
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#define LIST_INSERT_AFTER(listelm, elm, field) do { \
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if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \
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(listelm)->field.le_next->field.le_prev = \
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&(elm)->field.le_next; \
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(listelm)->field.le_next = (elm); \
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(elm)->field.le_prev = &(listelm)->field.le_next; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef LIST_INSERT_BEFORE
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#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
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QUEUEDEBUG_LIST_OP((listelm), field) \
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(elm)->field.le_prev = (listelm)->field.le_prev; \
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(elm)->field.le_next = (listelm); \
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*(listelm)->field.le_prev = (elm); \
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(listelm)->field.le_prev = &(elm)->field.le_next; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef LIST_INSERT_HEAD
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#define LIST_INSERT_HEAD(head, elm, field) do { \
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if (((elm)->field.le_next = (head)->lh_first) != NULL) \
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(head)->lh_first->field.le_prev = &(elm)->field.le_next;\
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(head)->lh_first = (elm); \
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(elm)->field.le_prev = &(head)->lh_first; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef LIST_REMOVE
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#define LIST_REMOVE(elm, field) do { \
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if ((elm)->field.le_next != NULL) \
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(elm)->field.le_next->field.le_prev = \
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(elm)->field.le_prev; \
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*(elm)->field.le_prev = (elm)->field.le_next; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef LIST_FOREACH
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#define LIST_FOREACH(var, head, field) \
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for ((var) = ((head)->lh_first); \
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(var); \
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(var) = ((var)->field.le_next))
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#endif
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#ifndef LIST_EMPTY
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#define LIST_EMPTY(head) ((head)->lh_first == NULL)
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#endif
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#ifndef LIST_FIRST
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#define LIST_FIRST(head) ((head)->lh_first)
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#endif
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#ifndef LIST_NEXT
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#define LIST_NEXT(elm, field) ((elm)->field.le_next)
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#endif
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#ifndef SLIST_HEAD
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#define SLIST_HEAD(name, type) \
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struct name { \
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struct type *slh_first; /* first element */ \
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}
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#endif
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#ifndef SLIST_HEAD_INITIALIZER
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#define SLIST_HEAD_INITIALIZER(head) \
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{ NULL }
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#endif
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#ifndef SLIST_ENTRY
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#define SLIST_ENTRY(type) \
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struct { \
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struct type *sle_next; /* next element */ \
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}
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#endif
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#ifndef SLIST_INIT
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#define SLIST_INIT(head) do { \
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(head)->slh_first = NULL; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef SLIST_INSERT_AFTER
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#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \
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(elm)->field.sle_next = (slistelm)->field.sle_next; \
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(slistelm)->field.sle_next = (elm); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef SLIST_INSERT_HEAD
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#define SLIST_INSERT_HEAD(head, elm, field) do { \
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(elm)->field.sle_next = (head)->slh_first; \
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(head)->slh_first = (elm); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef SLIST_REMOVE_HEAD
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#define SLIST_REMOVE_HEAD(head, field) do { \
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(head)->slh_first = (head)->slh_first->field.sle_next; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef SLIST_REMOVE
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#define SLIST_REMOVE(head, elm, type, field) do { \
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if ((head)->slh_first == (elm)) { \
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SLIST_REMOVE_HEAD((head), field); \
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} \
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else { \
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struct type *curelm = (head)->slh_first; \
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while(curelm->field.sle_next != (elm)) \
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curelm = curelm->field.sle_next; \
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curelm->field.sle_next = \
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curelm->field.sle_next->field.sle_next; \
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} \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef SLIST_REMOVE_AFTER
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#define SLIST_REMOVE_AFTER(slistelm, field) do { \
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(slistelm)->field.sle_next = \
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SLIST_NEXT(SLIST_NEXT((slistelm), field), field); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef SLIST_FOREACH
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#define SLIST_FOREACH(var, head, field) \
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for((var) = (head)->slh_first; (var); (var) = (var)->field.sle_next)
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#endif
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#ifndef SLIST_EMPTY
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#define SLIST_EMPTY(head) ((head)->slh_first == NULL)
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#endif
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#ifndef SLIST_FIRST
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#define SLIST_FIRST(head) ((head)->slh_first)
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#endif
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#ifndef SLIST_NEXT
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#define SLIST_NEXT(elm, field) ((elm)->field.sle_next)
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#endif
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#ifndef TAILQ_HEAD
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#define 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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#endif
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#ifndef TAILQ_HEAD_INITIALIZER
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#define TAILQ_HEAD_INITIALIZER(head) \
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{ NULL, &(head).tqh_first }
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#endif
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#ifndef TAILQ_ENTRY
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#define 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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#endif
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#ifndef TAILQ_INIT
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#define 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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#endif
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#ifndef TAILQ_INSERT_HEAD
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#define TAILQ_INSERT_HEAD(head, elm, field) do { \
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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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#endif
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#ifndef TAILQ_INSERT_TAIL
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#define TAILQ_INSERT_TAIL(head, elm, field) do { \
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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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#endif
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#ifndef TAILQ_INSERT_AFTER
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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) != 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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#endif
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#ifndef TAILQ_INSERT_BEFORE
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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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#endif
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#ifndef TAILQ_REMOVE
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#define TAILQ_REMOVE(head, elm, field) do { \
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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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} while (/*CONSTCOND*/0)
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#endif
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#ifndef TAILQ_FOREACH
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#define 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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#endif
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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) = ((head)->tqh_first); \
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(var) != NULL && ((next) = TAILQ_NEXT(var, field), 1); \
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(var) = (next))
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#endif
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#ifndef TAILQ_FOREACH_REVERSE
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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); \
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(var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
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#endif
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#ifndef TAILQ_EMPTY
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#define TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
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#endif
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#ifndef TAILQ_FIRST
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#define TAILQ_FIRST(head) ((head)->tqh_first)
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#endif
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#ifndef TAILQ_NEXT
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#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
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#endif
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#ifndef TAILQ_LAST
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#define TAILQ_LAST(head, headname) \
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(*(((struct headname *)((head)->tqh_last))->tqh_last))
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#endif
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#ifndef CIRCLEQ_HEAD
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#define CIRCLEQ_HEAD(name, type) \
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struct name { \
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struct type *cqh_first; /* first element */ \
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struct type *cqh_last; /* last element */ \
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}
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#endif
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#ifndef CIRCLEQ_HEAD_INITIALIZER
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#define CIRCLEQ_HEAD_INITIALIZER(head) \
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{ (void *)&head, (void *)&head }
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#endif
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#ifndef CIRCLEQ_ENTRY
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#define CIRCLEQ_ENTRY(type) \
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struct { \
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struct type *cqe_next; /* next element */ \
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struct type *cqe_prev; /* previous element */ \
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}
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#endif
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/*
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* Circular queue functions.
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*/
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#ifndef CIRCLEQ_INIT
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#define CIRCLEQ_INIT(head) do { \
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(head)->cqh_first = (void *)(head); \
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(head)->cqh_last = (void *)(head); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef CIRCLEQ_INSERT_AFTER
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#define CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do { \
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(elm)->field.cqe_next = (listelm)->field.cqe_next; \
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(elm)->field.cqe_prev = (listelm); \
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if ((listelm)->field.cqe_next == (void *)(head)) \
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(head)->cqh_last = (elm); \
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else \
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(listelm)->field.cqe_next->field.cqe_prev = (elm); \
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(listelm)->field.cqe_next = (elm); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef CIRCLEQ_INSERT_BEFORE
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#define CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do { \
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(elm)->field.cqe_next = (listelm); \
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(elm)->field.cqe_prev = (listelm)->field.cqe_prev; \
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if ((listelm)->field.cqe_prev == (void *)(head)) \
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(head)->cqh_first = (elm); \
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else \
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(listelm)->field.cqe_prev->field.cqe_next = (elm); \
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(listelm)->field.cqe_prev = (elm); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef CIRCLEQ_INSERT_HEAD
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#define CIRCLEQ_INSERT_HEAD(head, elm, field) do { \
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(elm)->field.cqe_next = (head)->cqh_first; \
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(elm)->field.cqe_prev = (void *)(head); \
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if ((head)->cqh_last == (void *)(head)) \
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(head)->cqh_last = (elm); \
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else \
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(head)->cqh_first->field.cqe_prev = (elm); \
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(head)->cqh_first = (elm); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef CIRCLEQ_INSERT_TAIL
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#define CIRCLEQ_INSERT_TAIL(head, elm, field) do { \
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(elm)->field.cqe_next = (void *)(head); \
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(elm)->field.cqe_prev = (head)->cqh_last; \
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if ((head)->cqh_first == (void *)(head)) \
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(head)->cqh_first = (elm); \
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else \
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(head)->cqh_last->field.cqe_next = (elm); \
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(head)->cqh_last = (elm); \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef CIRCLEQ_REMOVE
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#define CIRCLEQ_REMOVE(head, elm, field) do { \
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if ((elm)->field.cqe_next == (void *)(head)) \
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(head)->cqh_last = (elm)->field.cqe_prev; \
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else \
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(elm)->field.cqe_next->field.cqe_prev = \
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(elm)->field.cqe_prev; \
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if ((elm)->field.cqe_prev == (void *)(head)) \
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(head)->cqh_first = (elm)->field.cqe_next; \
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else \
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(elm)->field.cqe_prev->field.cqe_next = \
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(elm)->field.cqe_next; \
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} while (/*CONSTCOND*/0)
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#endif
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#ifndef CIRCLEQ_FOREACH
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#define CIRCLEQ_FOREACH(var, head, field) \
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for ((var) = ((head)->cqh_first); \
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(var) != (const void *)(head); \
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(var) = ((var)->field.cqe_next))
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#endif
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#ifndef CIRCLEQ_FOREACH_REVERSE
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#define CIRCLEQ_FOREACH_REVERSE(var, head, field) \
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for ((var) = ((head)->cqh_last); \
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(var) != (const void *)(head); \
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(var) = ((var)->field.cqe_prev))
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#endif
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#ifndef CIRCLEQ_EMPTY
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#define CIRCLEQ_EMPTY(head) ((head)->cqh_first == (void *)(head))
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#endif
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#ifndef CIRCLEQ_FIRST
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#define CIRCLEQ_FIRST(head) ((head)->cqh_first)
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#endif
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#ifndef CIRCLEQ_LAST
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#define CIRCLEQ_LAST(head) ((head)->cqh_last)
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#endif
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#ifndef CIRCLEQ_NEXT
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#define CIRCLEQ_NEXT(elm, field) ((elm)->field.cqe_next)
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#endif
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#ifndef CIRCLEQ_PREV
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#define CIRCLEQ_PREV(elm, field) ((elm)->field.cqe_prev)
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#endif
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#ifndef CIRCLEQ_LOOP_NEXT
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#define CIRCLEQ_LOOP_NEXT(head, elm, field) \
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(((elm)->field.cqe_next == (void *)(head)) \
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? ((head)->cqh_first) \
|
|
: (elm->field.cqe_next))
|
|
#endif
|
|
#ifndef CIRCLEQ_LOOP_PREV
|
|
#define CIRCLEQ_LOOP_PREV(head, elm, field) \
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|
(((elm)->field.cqe_prev == (void *)(head)) \
|
|
? ((head)->cqh_last) \
|
|
: (elm->field.cqe_prev))
|
|
#endif
|
|
|
|
#endif /* !_NBCOMPAT_QUEUE_H */
|