diff options
Diffstat (limited to 'include/bsd/queue.h')
| -rw-r--r-- | include/bsd/queue.h | 625 |
1 files changed, 19 insertions, 606 deletions
diff --git a/include/bsd/queue.h b/include/bsd/queue.h index f1f35c8..3db70cf 100644 --- a/include/bsd/queue.h +++ b/include/bsd/queue.h @@ -1,6 +1,5 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. +/* + * Copyright © 2009 Guillem Jover * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -10,613 +9,27 @@ * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)queue.h 8.5 (Berkeley) 8/20/94 - * $FreeBSD$ - */ - -#ifndef _SYS_QUEUE_H_ -#define _SYS_QUEUE_H_ - -#include <sys/cdefs.h> - -/* - * This file defines four types of data structures: singly-linked lists, - * singly-linked tail queues, lists and tail queues. - * - * A singly-linked list is headed by a single forward pointer. The elements - * are singly linked for minimum space and pointer manipulation overhead at - * the expense of O(n) removal for arbitrary elements. New elements can be - * added to the list after an existing element or at the head of the list. - * Elements being removed from the head of the list should use the explicit - * macro for this purpose for optimum efficiency. A singly-linked list may - * only be traversed in the forward direction. Singly-linked lists are ideal - * for applications with large datasets and few or no removals or for - * implementing a LIFO queue. - * - * A singly-linked tail queue is headed by a pair of pointers, one to the - * head of the list and the other to the tail of the list. The elements are - * singly linked for minimum space and pointer manipulation overhead at the - * expense of O(n) removal for arbitrary elements. New elements can be added - * to the list after an existing element, at the head of the list, or at the - * end of the list. Elements being removed from the head of the tail queue - * should use the explicit macro for this purpose for optimum efficiency. - * A singly-linked tail queue may only be traversed in the forward direction. - * Singly-linked tail queues are ideal for applications with large datasets - * and few or no removals or for implementing a FIFO queue. - * - * A list is headed by a single forward pointer (or an array of forward - * pointers for a hash table header). The elements are doubly linked - * so that an arbitrary element can be removed without a need to - * traverse the list. New elements can be added to the list before - * or after an existing element or at the head of the list. A list - * may only be traversed in the forward direction. - * - * A tail queue is headed by a pair of pointers, one to the head of the - * list and the other to the tail of the list. The elements are doubly - * linked so that an arbitrary element can be removed without a need to - * traverse the list. New elements can be added to the list before or - * after an existing element, at the head of the list, or at the end of - * the list. A tail queue may be traversed in either direction. - * - * For details on the use of these macros, see the queue(3) manual page. - * + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. * - * SLIST LIST STAILQ TAILQ - * _HEAD + + + + - * _HEAD_INITIALIZER + + + + - * _ENTRY + + + + - * _INIT + + + + - * _EMPTY + + + + - * _FIRST + + + + - * _NEXT + + + + - * _PREV - - - + - * _LAST - - + + - * _FOREACH + + + + - * _FOREACH_SAFE + + + + - * _FOREACH_REVERSE - - - + - * _FOREACH_REVERSE_SAFE - - - + - * _INSERT_HEAD + + + + - * _INSERT_BEFORE - + - + - * _INSERT_AFTER + + + + - * _INSERT_TAIL - - + + - * _CONCAT - - + + - * _REMOVE_AFTER + - + - - * _REMOVE_HEAD + - + - - * _REMOVE + + + + - * - */ -#ifdef QUEUE_MACRO_DEBUG -/* Store the last 2 places the queue element or head was altered */ -struct qm_trace { - char * lastfile; - int lastline; - char * prevfile; - int prevline; -}; - -#define TRACEBUF struct qm_trace trace; -#define TRASHIT(x) do {(x) = (void *)-1;} while (0) - -#define QMD_TRACE_HEAD(head) do { \ - (head)->trace.prevline = (head)->trace.lastline; \ - (head)->trace.prevfile = (head)->trace.lastfile; \ - (head)->trace.lastline = __LINE__; \ - (head)->trace.lastfile = __FILE__; \ -} while (0) - -#define QMD_TRACE_ELEM(elem) do { \ - (elem)->trace.prevline = (elem)->trace.lastline; \ - (elem)->trace.prevfile = (elem)->trace.lastfile; \ - (elem)->trace.lastline = __LINE__; \ - (elem)->trace.lastfile = __FILE__; \ -} while (0) - -#else -#define QMD_TRACE_ELEM(elem) -#define QMD_TRACE_HEAD(head) -#define TRACEBUF -#define TRASHIT(x) -#endif /* QUEUE_MACRO_DEBUG */ - -/* - * Singly-linked List declarations. - */ -#define SLIST_HEAD(name, type) \ -struct name { \ - struct type *slh_first; /* first element */ \ -} - -#define SLIST_HEAD_INITIALIZER(head) \ - { NULL } - -#define SLIST_ENTRY(type) \ -struct { \ - struct type *sle_next; /* next element */ \ -} - -/* - * Singly-linked List functions. - */ -#define SLIST_EMPTY(head) ((head)->slh_first == NULL) - -#define SLIST_FIRST(head) ((head)->slh_first) - -#define SLIST_FOREACH(var, head, field) \ - for ((var) = SLIST_FIRST((head)); \ - (var); \ - (var) = SLIST_NEXT((var), field)) - -#define SLIST_FOREACH_SAFE(var, head, field, tvar) \ - for ((var) = SLIST_FIRST((head)); \ - (var) && ((tvar) = SLIST_NEXT((var), field), 1); \ - (var) = (tvar)) - -#define SLIST_FOREACH_PREVPTR(var, varp, head, field) \ - for ((varp) = &SLIST_FIRST((head)); \ - ((var) = *(varp)) != NULL; \ - (varp) = &SLIST_NEXT((var), field)) - -#define SLIST_INIT(head) do { \ - SLIST_FIRST((head)) = NULL; \ -} while (0) - -#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \ - SLIST_NEXT((elm), field) = SLIST_NEXT((slistelm), field); \ - SLIST_NEXT((slistelm), field) = (elm); \ -} while (0) - -#define SLIST_INSERT_HEAD(head, elm, field) do { \ - SLIST_NEXT((elm), field) = SLIST_FIRST((head)); \ - SLIST_FIRST((head)) = (elm); \ -} while (0) - -#define SLIST_NEXT(elm, field) ((elm)->field.sle_next) - -#define SLIST_REMOVE(head, elm, type, field) do { \ - if (SLIST_FIRST((head)) == (elm)) { \ - SLIST_REMOVE_HEAD((head), field); \ - } \ - else { \ - struct type *curelm = SLIST_FIRST((head)); \ - while (SLIST_NEXT(curelm, field) != (elm)) \ - curelm = SLIST_NEXT(curelm, field); \ - SLIST_REMOVE_AFTER(curelm, field); \ - } \ - TRASHIT((elm)->field.sle_next); \ -} while (0) - -#define SLIST_REMOVE_AFTER(elm, field) do { \ - SLIST_NEXT(elm, field) = \ - SLIST_NEXT(SLIST_NEXT(elm, field), field); \ -} while (0) - -#define SLIST_REMOVE_HEAD(head, field) do { \ - SLIST_FIRST((head)) = SLIST_NEXT(SLIST_FIRST((head)), field); \ -} while (0) - -/* - * Singly-linked Tail queue declarations. - */ -#define STAILQ_HEAD(name, type) \ -struct name { \ - struct type *stqh_first;/* first element */ \ - struct type **stqh_last;/* addr of last next element */ \ -} - -#define STAILQ_HEAD_INITIALIZER(head) \ - { NULL, &(head).stqh_first } - -#define STAILQ_ENTRY(type) \ -struct { \ - struct type *stqe_next; /* next element */ \ -} - -/* - * Singly-linked Tail queue functions. - */ -#define STAILQ_CONCAT(head1, head2) do { \ - if (!STAILQ_EMPTY((head2))) { \ - *(head1)->stqh_last = (head2)->stqh_first; \ - (head1)->stqh_last = (head2)->stqh_last; \ - STAILQ_INIT((head2)); \ - } \ -} while (0) - -#define STAILQ_EMPTY(head) ((head)->stqh_first == NULL) - -#define STAILQ_FIRST(head) ((head)->stqh_first) - -#define STAILQ_FOREACH(var, head, field) \ - for((var) = STAILQ_FIRST((head)); \ - (var); \ - (var) = STAILQ_NEXT((var), field)) - - -#define STAILQ_FOREACH_SAFE(var, head, field, tvar) \ - for ((var) = STAILQ_FIRST((head)); \ - (var) && ((tvar) = STAILQ_NEXT((var), field), 1); \ - (var) = (tvar)) - -#define STAILQ_INIT(head) do { \ - STAILQ_FIRST((head)) = NULL; \ - (head)->stqh_last = &STAILQ_FIRST((head)); \ -} while (0) - -#define STAILQ_INSERT_AFTER(head, tqelm, elm, field) do { \ - if ((STAILQ_NEXT((elm), field) = STAILQ_NEXT((tqelm), field)) == NULL)\ - (head)->stqh_last = &STAILQ_NEXT((elm), field); \ - STAILQ_NEXT((tqelm), field) = (elm); \ -} while (0) - -#define STAILQ_INSERT_HEAD(head, elm, field) do { \ - if ((STAILQ_NEXT((elm), field) = STAILQ_FIRST((head))) == NULL) \ - (head)->stqh_last = &STAILQ_NEXT((elm), field); \ - STAILQ_FIRST((head)) = (elm); \ -} while (0) - -#define STAILQ_INSERT_TAIL(head, elm, field) do { \ - STAILQ_NEXT((elm), field) = NULL; \ - *(head)->stqh_last = (elm); \ - (head)->stqh_last = &STAILQ_NEXT((elm), field); \ -} while (0) - -#define STAILQ_LAST(head, type, field) \ - (STAILQ_EMPTY((head)) ? \ - NULL : \ - ((struct type *)(void *) \ - ((char *)((head)->stqh_last) - __offsetof(struct type, field)))) - -#define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next) - -#define STAILQ_REMOVE(head, elm, type, field) do { \ - if (STAILQ_FIRST((head)) == (elm)) { \ - STAILQ_REMOVE_HEAD((head), field); \ - } \ - else { \ - struct type *curelm = STAILQ_FIRST((head)); \ - while (STAILQ_NEXT(curelm, field) != (elm)) \ - curelm = STAILQ_NEXT(curelm, field); \ - STAILQ_REMOVE_AFTER(head, curelm, field); \ - } \ - TRASHIT((elm)->field.stqe_next); \ -} while (0) - -#define STAILQ_REMOVE_HEAD(head, field) do { \ - if ((STAILQ_FIRST((head)) = \ - STAILQ_NEXT(STAILQ_FIRST((head)), field)) == NULL) \ - (head)->stqh_last = &STAILQ_FIRST((head)); \ -} while (0) - -#define STAILQ_REMOVE_AFTER(head, elm, field) do { \ - if ((STAILQ_NEXT(elm, field) = \ - STAILQ_NEXT(STAILQ_NEXT(elm, field), field)) == NULL) \ - (head)->stqh_last = &STAILQ_NEXT((elm), field); \ -} while (0) - -#define STAILQ_SWAP(head1, head2, type) do { \ - struct type *swap_first = STAILQ_FIRST(head1); \ - struct type **swap_last = (head1)->stqh_last; \ - STAILQ_FIRST(head1) = STAILQ_FIRST(head2); \ - (head1)->stqh_last = (head2)->stqh_last; \ - STAILQ_FIRST(head2) = swap_first; \ - (head2)->stqh_last = swap_last; \ - if (STAILQ_EMPTY(head1)) \ - (head1)->stqh_last = &STAILQ_FIRST(head1); \ - if (STAILQ_EMPTY(head2)) \ - (head2)->stqh_last = &STAILQ_FIRST(head2); \ -} while (0) - - -/* - * List declarations. - */ -#define LIST_HEAD(name, type) \ -struct name { \ - struct type *lh_first; /* first element */ \ -} - -#define LIST_HEAD_INITIALIZER(head) \ - { NULL } - -#define LIST_ENTRY(type) \ -struct { \ - struct type *le_next; /* next element */ \ - struct type **le_prev; /* address of previous next element */ \ -} - -/* - * List functions. - */ - -#if (defined(_KERNEL) && defined(INVARIANTS)) -#define QMD_LIST_CHECK_HEAD(head, field) do { \ - if (LIST_FIRST((head)) != NULL && \ - LIST_FIRST((head))->field.le_prev != \ - &LIST_FIRST((head))) \ - panic("Bad list head %p first->prev != head", (head)); \ -} while (0) - -#define QMD_LIST_CHECK_NEXT(elm, field) do { \ - if (LIST_NEXT((elm), field) != NULL && \ - LIST_NEXT((elm), field)->field.le_prev != \ - &((elm)->field.le_next)) \ - panic("Bad link elm %p next->prev != elm", (elm)); \ -} while (0) - -#define QMD_LIST_CHECK_PREV(elm, field) do { \ - if (*(elm)->field.le_prev != (elm)) \ - panic("Bad link elm %p prev->next != elm", (elm)); \ -} while (0) -#else -#define QMD_LIST_CHECK_HEAD(head, field) -#define QMD_LIST_CHECK_NEXT(elm, field) -#define QMD_LIST_CHECK_PREV(elm, field) -#endif /* (_KERNEL && INVARIANTS) */ - -#define LIST_EMPTY(head) ((head)->lh_first == NULL) - -#define LIST_FIRST(head) ((head)->lh_first) - -#define LIST_FOREACH(var, head, field) \ - for ((var) = LIST_FIRST((head)); \ - (var); \ - (var) = LIST_NEXT((var), field)) - -#define LIST_FOREACH_SAFE(var, head, field, tvar) \ - for ((var) = LIST_FIRST((head)); \ - (var) && ((tvar) = LIST_NEXT((var), field), 1); \ - (var) = (tvar)) - -#define LIST_INIT(head) do { \ - LIST_FIRST((head)) = NULL; \ -} while (0) - -#define LIST_INSERT_AFTER(listelm, elm, field) do { \ - QMD_LIST_CHECK_NEXT(listelm, field); \ - if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL)\ - LIST_NEXT((listelm), field)->field.le_prev = \ - &LIST_NEXT((elm), field); \ - LIST_NEXT((listelm), field) = (elm); \ - (elm)->field.le_prev = &LIST_NEXT((listelm), field); \ -} while (0) - -#define LIST_INSERT_BEFORE(listelm, elm, field) do { \ - QMD_LIST_CHECK_PREV(listelm, field); \ - (elm)->field.le_prev = (listelm)->field.le_prev; \ - LIST_NEXT((elm), field) = (listelm); \ - *(listelm)->field.le_prev = (elm); \ - (listelm)->field.le_prev = &LIST_NEXT((elm), field); \ -} while (0) - -#define LIST_INSERT_HEAD(head, elm, field) do { \ - QMD_LIST_CHECK_HEAD((head), field); \ - if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \ - LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field);\ - LIST_FIRST((head)) = (elm); \ - (elm)->field.le_prev = &LIST_FIRST((head)); \ -} while (0) - -#define LIST_NEXT(elm, field) ((elm)->field.le_next) - -#define LIST_REMOVE(elm, field) do { \ - QMD_LIST_CHECK_NEXT(elm, field); \ - QMD_LIST_CHECK_PREV(elm, field); \ - if (LIST_NEXT((elm), field) != NULL) \ - LIST_NEXT((elm), field)->field.le_prev = \ - (elm)->field.le_prev; \ - *(elm)->field.le_prev = LIST_NEXT((elm), field); \ - TRASHIT((elm)->field.le_next); \ - TRASHIT((elm)->field.le_prev); \ -} while (0) - -#define LIST_SWAP(head1, head2, type, field) do { \ - struct type *swap_tmp = LIST_FIRST((head1)); \ - LIST_FIRST((head1)) = LIST_FIRST((head2)); \ - LIST_FIRST((head2)) = swap_tmp; \ - if ((swap_tmp = LIST_FIRST((head1))) != NULL) \ - swap_tmp->field.le_prev = &LIST_FIRST((head1)); \ - if ((swap_tmp = LIST_FIRST((head2))) != NULL) \ - swap_tmp->field.le_prev = &LIST_FIRST((head2)); \ -} while (0) - -/* - * Tail queue declarations. - */ -#define TAILQ_HEAD(name, type) \ -struct name { \ - struct type *tqh_first; /* first element */ \ - struct type **tqh_last; /* addr of last next element */ \ - TRACEBUF \ -} - -#define TAILQ_HEAD_INITIALIZER(head) \ - { NULL, &(head).tqh_first } - -#define TAILQ_ENTRY(type) \ -struct { \ - struct type *tqe_next; /* next element */ \ - struct type **tqe_prev; /* address of previous next element */ \ - TRACEBUF \ -} - -/* - * Tail queue functions. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, + * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#if (defined(_KERNEL) && defined(INVARIANTS)) -#define QMD_TAILQ_CHECK_HEAD(head, field) do { \ - if (!TAILQ_EMPTY(head) && \ - TAILQ_FIRST((head))->field.tqe_prev != \ - &TAILQ_FIRST((head))) \ - panic("Bad tailq head %p first->prev != head", (head)); \ -} while (0) - -#define QMD_TAILQ_CHECK_TAIL(head, field) do { \ - if (*(head)->tqh_last != NULL) \ - panic("Bad tailq NEXT(%p->tqh_last) != NULL", (head)); \ -} while (0) - -#define QMD_TAILQ_CHECK_NEXT(elm, field) do { \ - if (TAILQ_NEXT((elm), field) != NULL && \ - TAILQ_NEXT((elm), field)->field.tqe_prev != \ - &((elm)->field.tqe_next)) \ - panic("Bad link elm %p next->prev != elm", (elm)); \ -} while (0) - -#define QMD_TAILQ_CHECK_PREV(elm, field) do { \ - if (*(elm)->field.tqe_prev != (elm)) \ - panic("Bad link elm %p prev->next != elm", (elm)); \ -} while (0) -#else -#define QMD_TAILQ_CHECK_HEAD(head, field) -#define QMD_TAILQ_CHECK_TAIL(head, headname) -#define QMD_TAILQ_CHECK_NEXT(elm, field) -#define QMD_TAILQ_CHECK_PREV(elm, field) -#endif /* (_KERNEL && INVARIANTS) */ - -#define TAILQ_CONCAT(head1, head2, field) do { \ - if (!TAILQ_EMPTY(head2)) { \ - *(head1)->tqh_last = (head2)->tqh_first; \ - (head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \ - (head1)->tqh_last = (head2)->tqh_last; \ - TAILQ_INIT((head2)); \ - QMD_TRACE_HEAD(head1); \ - QMD_TRACE_HEAD(head2); \ - } \ -} while (0) - -#define TAILQ_EMPTY(head) ((head)->tqh_first == NULL) - -#define TAILQ_FIRST(head) ((head)->tqh_first) - -#define TAILQ_FOREACH(var, head, field) \ - for ((var) = TAILQ_FIRST((head)); \ - (var); \ - (var) = TAILQ_NEXT((var), field)) - -#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \ - for ((var) = TAILQ_FIRST((head)); \ - (var) && ((tvar) = TAILQ_NEXT((var), field), 1); \ - (var) = (tvar)) - -#define TAILQ_FOREACH_REVERSE(var, head, headname, field) \ - for ((var) = TAILQ_LAST((head), headname); \ - (var); \ - (var) = TAILQ_PREV((var), headname, field)) - -#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \ - for ((var) = TAILQ_LAST((head), headname); \ - (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1); \ - (var) = (tvar)) - -#define TAILQ_INIT(head) do { \ - TAILQ_FIRST((head)) = NULL; \ - (head)->tqh_last = &TAILQ_FIRST((head)); \ - QMD_TRACE_HEAD(head); \ -} while (0) - -#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \ - QMD_TAILQ_CHECK_NEXT(listelm, field); \ - if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field)) != NULL)\ - TAILQ_NEXT((elm), field)->field.tqe_prev = \ - &TAILQ_NEXT((elm), field); \ - else { \ - (head)->tqh_last = &TAILQ_NEXT((elm), field); \ - QMD_TRACE_HEAD(head); \ - } \ - TAILQ_NEXT((listelm), field) = (elm); \ - (elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \ - QMD_TRACE_ELEM(&(elm)->field); \ - QMD_TRACE_ELEM(&listelm->field); \ -} while (0) - -#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \ - QMD_TAILQ_CHECK_PREV(listelm, field); \ - (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \ - TAILQ_NEXT((elm), field) = (listelm); \ - *(listelm)->field.tqe_prev = (elm); \ - (listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field); \ - QMD_TRACE_ELEM(&(elm)->field); \ - QMD_TRACE_ELEM(&listelm->field); \ -} while (0) - -#define TAILQ_INSERT_HEAD(head, elm, field) do { \ - QMD_TAILQ_CHECK_HEAD(head, field); \ - if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL) \ - TAILQ_FIRST((head))->field.tqe_prev = \ - &TAILQ_NEXT((elm), field); \ - else \ - (head)->tqh_last = &TAILQ_NEXT((elm), field); \ - TAILQ_FIRST((head)) = (elm); \ - (elm)->field.tqe_prev = &TAILQ_FIRST((head)); \ - QMD_TRACE_HEAD(head); \ - QMD_TRACE_ELEM(&(elm)->field); \ -} while (0) - -#define TAILQ_INSERT_TAIL(head, elm, field) do { \ - QMD_TAILQ_CHECK_TAIL(head, field); \ - TAILQ_NEXT((elm), field) = NULL; \ - (elm)->field.tqe_prev = (head)->tqh_last; \ - *(head)->tqh_last = (elm); \ - (head)->tqh_last = &TAILQ_NEXT((elm), field); \ - QMD_TRACE_HEAD(head); \ - QMD_TRACE_ELEM(&(elm)->field); \ -} while (0) - -#define TAILQ_LAST(head, headname) \ - (*(((struct headname *)((head)->tqh_last))->tqh_last)) -#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next) +#ifndef LIBBSD_BSD_QUEUE_H +#define LIBBSD_BSD_QUEUE_H -#define TAILQ_PREV(elm, headname, field) \ - (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last)) +#warning "This header is deprecated, use the one in bsd/sys/queue.h instead." -#define TAILQ_REMOVE(head, elm, field) do { \ - QMD_TAILQ_CHECK_NEXT(elm, field); \ - QMD_TAILQ_CHECK_PREV(elm, field); \ - if ((TAILQ_NEXT((elm), field)) != NULL) \ - TAILQ_NEXT((elm), field)->field.tqe_prev = \ - (elm)->field.tqe_prev; \ - else { \ - (head)->tqh_last = (elm)->field.tqe_prev; \ - QMD_TRACE_HEAD(head); \ - } \ - *(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \ - TRASHIT((elm)->field.tqe_next); \ - TRASHIT((elm)->field.tqe_prev); \ - QMD_TRACE_ELEM(&(elm)->field); \ -} while (0) +#include <bsd/sys/queue.h> -#define TAILQ_SWAP(head1, head2, type, field) do { \ - struct type *swap_first = (head1)->tqh_first; \ - struct type **swap_last = (head1)->tqh_last; \ - (head1)->tqh_first = (head2)->tqh_first; \ - (head1)->tqh_last = (head2)->tqh_last; \ - (head2)->tqh_first = swap_first; \ - (head2)->tqh_last = swap_last; \ - if ((swap_first = (head1)->tqh_first) != NULL) \ - swap_first->field.tqe_prev = &(head1)->tqh_first; \ - else \ - (head1)->tqh_last = &(head1)->tqh_first; \ - if ((swap_first = (head2)->tqh_first) != NULL) \ - swap_first->field.tqe_prev = &(head2)->tqh_first; \ - else \ - (head2)->tqh_last = &(head2)->tqh_first; \ -} while (0) +#endif -#endif /* !_SYS_QUEUE_H_ */ |