+++ /dev/null
-/* $NetBSD: queue.h,v 1.53 2011/11/19 22:51:31 tls Exp $ */
-
-/*
- * Copyright (c) 1991, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 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.
- * 3. 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
- */
-
-#ifndef _SYS_QUEUE_H_
-#define _SYS_QUEUE_H_
-
-/*
- * This file defines five types of data structures: singly-linked lists,
- * lists, simple queues, tail queues, and circular 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 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 simple queue is headed by a pair of pointers, one the head of the
- * list and the other to the tail of the list. The elements are singly
- * linked to save space, so elements can only be removed from the
- * head of the list. 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. A simple queue 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.
- *
- * A circle 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 circle queue may be traversed in either direction, but has a more
- * complex end of list detection.
- *
- * For details on the use of these macros, see the queue(3) manual page.
- */
-
-/*
- * List definitions.
- */
-#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(QUEUEDEBUG)
-#define QUEUEDEBUG_LIST_INSERT_HEAD(head, elm, field) \
- if ((head)->lh_first && \
- (head)->lh_first->field.le_prev != &(head)->lh_first) \
- panic("LIST_INSERT_HEAD %p %s:%d", (head), __FILE__, __LINE__);
-#define QUEUEDEBUG_LIST_OP(elm, field) \
- if ((elm)->field.le_next && \
- (elm)->field.le_next->field.le_prev != \
- &(elm)->field.le_next) \
- panic("LIST_* forw %p %s:%d", (elm), __FILE__, __LINE__);\
- if (*(elm)->field.le_prev != (elm)) \
- panic("LIST_* back %p %s:%d", (elm), __FILE__, __LINE__);
-#define QUEUEDEBUG_LIST_POSTREMOVE(elm, field) \
- (elm)->field.le_next = (void *)1L; \
- (elm)->field.le_prev = (void *)1L;
-#else
-#define QUEUEDEBUG_LIST_INSERT_HEAD(head, elm, field)
-#define QUEUEDEBUG_LIST_OP(elm, field)
-#define QUEUEDEBUG_LIST_POSTREMOVE(elm, field)
-#endif
-
-#define LIST_INIT(head) do { \
- (head)->lh_first = NULL; \
-} while (/*CONSTCOND*/0)
-
-#define LIST_INSERT_AFTER(listelm, elm, field) do { \
- QUEUEDEBUG_LIST_OP((listelm), field) \
- if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \
- (listelm)->field.le_next->field.le_prev = \
- &(elm)->field.le_next; \
- (listelm)->field.le_next = (elm); \
- (elm)->field.le_prev = &(listelm)->field.le_next; \
-} while (/*CONSTCOND*/0)
-
-#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
- QUEUEDEBUG_LIST_OP((listelm), field) \
- (elm)->field.le_prev = (listelm)->field.le_prev; \
- (elm)->field.le_next = (listelm); \
- *(listelm)->field.le_prev = (elm); \
- (listelm)->field.le_prev = &(elm)->field.le_next; \
-} while (/*CONSTCOND*/0)
-
-#define LIST_INSERT_HEAD(head, elm, field) do { \
- QUEUEDEBUG_LIST_INSERT_HEAD((head), (elm), field) \
- if (((elm)->field.le_next = (head)->lh_first) != NULL) \
- (head)->lh_first->field.le_prev = &(elm)->field.le_next;\
- (head)->lh_first = (elm); \
- (elm)->field.le_prev = &(head)->lh_first; \
-} while (/*CONSTCOND*/0)
-
-#define LIST_REMOVE(elm, field) do { \
- QUEUEDEBUG_LIST_OP((elm), field) \
- if ((elm)->field.le_next != NULL) \
- (elm)->field.le_next->field.le_prev = \
- (elm)->field.le_prev; \
- *(elm)->field.le_prev = (elm)->field.le_next; \
- QUEUEDEBUG_LIST_POSTREMOVE((elm), field) \
-} while (/*CONSTCOND*/0)
-
-#define LIST_FOREACH(var, head, field) \
- for ((var) = ((head)->lh_first); \
- (var); \
- (var) = ((var)->field.le_next))
-
-#define LIST_FOREACH_SAFE(var, head, field, tvar) \
- for ((var) = LIST_FIRST((head)); \
- (var) && ((tvar) = LIST_NEXT((var), field), 1); \
- (var) = (tvar))
-/*
- * List access methods.
- */
-#define LIST_EMPTY(head) ((head)->lh_first == NULL)
-#define LIST_FIRST(head) ((head)->lh_first)
-#define LIST_NEXT(elm, field) ((elm)->field.le_next)
-
-
-/*
- * Singly-linked List definitions.
- */
-#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_INIT(head) do { \
- (head)->slh_first = NULL; \
-} while (/*CONSTCOND*/0)
-
-#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \
- (elm)->field.sle_next = (slistelm)->field.sle_next; \
- (slistelm)->field.sle_next = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define SLIST_INSERT_HEAD(head, elm, field) do { \
- (elm)->field.sle_next = (head)->slh_first; \
- (head)->slh_first = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define SLIST_REMOVE_HEAD(head, field) do { \
- (head)->slh_first = (head)->slh_first->field.sle_next; \
-} while (/*CONSTCOND*/0)
-
-#define SLIST_REMOVE(head, elm, type, field) do { \
- if ((head)->slh_first == (elm)) { \
- SLIST_REMOVE_HEAD((head), field); \
- } \
- else { \
- struct type *curelm = (head)->slh_first; \
- while(curelm->field.sle_next != (elm)) \
- curelm = curelm->field.sle_next; \
- curelm->field.sle_next = \
- curelm->field.sle_next->field.sle_next; \
- } \
-} while (/*CONSTCOND*/0)
-
-#define SLIST_REMOVE_AFTER(slistelm, field) do { \
- (slistelm)->field.sle_next = \
- SLIST_NEXT(SLIST_NEXT((slistelm), field), field); \
-} while (/*CONSTCOND*/0)
-
-#define SLIST_FOREACH(var, head, field) \
- for((var) = (head)->slh_first; (var); (var) = (var)->field.sle_next)
-
-#define SLIST_FOREACH_SAFE(var, head, field, tvar) \
- for ((var) = SLIST_FIRST((head)); \
- (var) && ((tvar) = SLIST_NEXT((var), field), 1); \
- (var) = (tvar))
-
-/*
- * Singly-linked List access methods.
- */
-#define SLIST_EMPTY(head) ((head)->slh_first == NULL)
-#define SLIST_FIRST(head) ((head)->slh_first)
-#define SLIST_NEXT(elm, field) ((elm)->field.sle_next)
-
-
-/*
- * 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_INIT(head) do { \
- (head)->stqh_first = NULL; \
- (head)->stqh_last = &(head)->stqh_first; \
-} while (/*CONSTCOND*/0)
-
-#define STAILQ_INSERT_HEAD(head, elm, field) do { \
- if (((elm)->field.stqe_next = (head)->stqh_first) == NULL) \
- (head)->stqh_last = &(elm)->field.stqe_next; \
- (head)->stqh_first = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define STAILQ_INSERT_TAIL(head, elm, field) do { \
- (elm)->field.stqe_next = NULL; \
- *(head)->stqh_last = (elm); \
- (head)->stqh_last = &(elm)->field.stqe_next; \
-} while (/*CONSTCOND*/0)
-
-#define STAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
- if (((elm)->field.stqe_next = (listelm)->field.stqe_next) == NULL)\
- (head)->stqh_last = &(elm)->field.stqe_next; \
- (listelm)->field.stqe_next = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define STAILQ_REMOVE_HEAD(head, field) do { \
- if (((head)->stqh_first = (head)->stqh_first->field.stqe_next) == NULL) \
- (head)->stqh_last = &(head)->stqh_first; \
-} while (/*CONSTCOND*/0)
-
-#define STAILQ_REMOVE(head, elm, type, field) do { \
- if ((head)->stqh_first == (elm)) { \
- STAILQ_REMOVE_HEAD((head), field); \
- } else { \
- struct type *curelm = (head)->stqh_first; \
- while (curelm->field.stqe_next != (elm)) \
- curelm = curelm->field.stqe_next; \
- if ((curelm->field.stqe_next = \
- curelm->field.stqe_next->field.stqe_next) == NULL) \
- (head)->stqh_last = &(curelm)->field.stqe_next; \
- } \
-} while (/*CONSTCOND*/0)
-
-#define STAILQ_FOREACH(var, head, field) \
- for ((var) = ((head)->stqh_first); \
- (var); \
- (var) = ((var)->field.stqe_next))
-
-#define STAILQ_FOREACH_SAFE(var, head, field, tvar) \
- for ((var) = STAILQ_FIRST((head)); \
- (var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
- (var) = (tvar))
-
-#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 (/*CONSTCOND*/0)
-
-#define STAILQ_LAST(head, type, field) \
- (STAILQ_EMPTY((head)) ? \
- NULL : \
- ((struct type *)(void *) \
- ((char *)((head)->stqh_last) - offsetof(struct type, field))))
-
-/*
- * Singly-linked Tail queue access methods.
- */
-#define STAILQ_EMPTY(head) ((head)->stqh_first == NULL)
-#define STAILQ_FIRST(head) ((head)->stqh_first)
-#define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
-
-
-/*
- * Simple queue definitions.
- */
-#define SIMPLEQ_HEAD(name, type) \
-struct name { \
- struct type *sqh_first; /* first element */ \
- struct type **sqh_last; /* addr of last next element */ \
-}
-
-#define SIMPLEQ_HEAD_INITIALIZER(head) \
- { NULL, &(head).sqh_first }
-
-#define SIMPLEQ_ENTRY(type) \
-struct { \
- struct type *sqe_next; /* next element */ \
-}
-
-/*
- * Simple queue functions.
- */
-#define SIMPLEQ_INIT(head) do { \
- (head)->sqh_first = NULL; \
- (head)->sqh_last = &(head)->sqh_first; \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_INSERT_HEAD(head, elm, field) do { \
- if (((elm)->field.sqe_next = (head)->sqh_first) == NULL) \
- (head)->sqh_last = &(elm)->field.sqe_next; \
- (head)->sqh_first = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_INSERT_TAIL(head, elm, field) do { \
- (elm)->field.sqe_next = NULL; \
- *(head)->sqh_last = (elm); \
- (head)->sqh_last = &(elm)->field.sqe_next; \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do { \
- if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL)\
- (head)->sqh_last = &(elm)->field.sqe_next; \
- (listelm)->field.sqe_next = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_REMOVE_HEAD(head, field) do { \
- if (((head)->sqh_first = (head)->sqh_first->field.sqe_next) == NULL) \
- (head)->sqh_last = &(head)->sqh_first; \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_REMOVE(head, elm, type, field) do { \
- if ((head)->sqh_first == (elm)) { \
- SIMPLEQ_REMOVE_HEAD((head), field); \
- } else { \
- struct type *curelm = (head)->sqh_first; \
- while (curelm->field.sqe_next != (elm)) \
- curelm = curelm->field.sqe_next; \
- if ((curelm->field.sqe_next = \
- curelm->field.sqe_next->field.sqe_next) == NULL) \
- (head)->sqh_last = &(curelm)->field.sqe_next; \
- } \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_FOREACH(var, head, field) \
- for ((var) = ((head)->sqh_first); \
- (var); \
- (var) = ((var)->field.sqe_next))
-
-#define SIMPLEQ_FOREACH_SAFE(var, head, field, next) \
- for ((var) = ((head)->sqh_first); \
- (var) && ((next = ((var)->field.sqe_next)), 1); \
- (var) = (next))
-
-#define SIMPLEQ_CONCAT(head1, head2) do { \
- if (!SIMPLEQ_EMPTY((head2))) { \
- *(head1)->sqh_last = (head2)->sqh_first; \
- (head1)->sqh_last = (head2)->sqh_last; \
- SIMPLEQ_INIT((head2)); \
- } \
-} while (/*CONSTCOND*/0)
-
-#define SIMPLEQ_LAST(head, type, field) \
- (SIMPLEQ_EMPTY((head)) ? \
- NULL : \
- ((struct type *)(void *) \
- ((char *)((head)->sqh_last) - offsetof(struct type, field))))
-
-/*
- * Simple queue access methods.
- */
-#define SIMPLEQ_EMPTY(head) ((head)->sqh_first == NULL)
-#define SIMPLEQ_FIRST(head) ((head)->sqh_first)
-#define SIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next)
-
-
-/*
- * Tail queue definitions.
- */
-#define _TAILQ_HEAD(name, type, qual) \
-struct name { \
- qual type *tqh_first; /* first element */ \
- qual type *qual *tqh_last; /* addr of last next element */ \
-}
-#define TAILQ_HEAD(name, type) _TAILQ_HEAD(name, struct type,)
-
-#define TAILQ_HEAD_INITIALIZER(head) \
- { NULL, &(head).tqh_first }
-
-#define _TAILQ_ENTRY(type, qual) \
-struct { \
- qual type *tqe_next; /* next element */ \
- qual type *qual *tqe_prev; /* address of previous next element */\
-}
-#define TAILQ_ENTRY(type) _TAILQ_ENTRY(struct type,)
-
-/*
- * Tail queue functions.
- */
-#if defined(_KERNEL) && defined(QUEUEDEBUG)
-#define QUEUEDEBUG_TAILQ_INSERT_HEAD(head, elm, field) \
- if ((head)->tqh_first && \
- (head)->tqh_first->field.tqe_prev != &(head)->tqh_first) \
- panic("TAILQ_INSERT_HEAD %p %s:%d", (head), __FILE__, __LINE__);
-#define QUEUEDEBUG_TAILQ_INSERT_TAIL(head, elm, field) \
- if (*(head)->tqh_last != NULL) \
- panic("TAILQ_INSERT_TAIL %p %s:%d", (head), __FILE__, __LINE__);
-#define QUEUEDEBUG_TAILQ_OP(elm, field) \
- if ((elm)->field.tqe_next && \
- (elm)->field.tqe_next->field.tqe_prev != \
- &(elm)->field.tqe_next) \
- panic("TAILQ_* forw %p %s:%d", (elm), __FILE__, __LINE__);\
- if (*(elm)->field.tqe_prev != (elm)) \
- panic("TAILQ_* back %p %s:%d", (elm), __FILE__, __LINE__);
-#define QUEUEDEBUG_TAILQ_PREREMOVE(head, elm, field) \
- if ((elm)->field.tqe_next == NULL && \
- (head)->tqh_last != &(elm)->field.tqe_next) \
- panic("TAILQ_PREREMOVE head %p elm %p %s:%d", \
- (head), (elm), __FILE__, __LINE__);
-#define QUEUEDEBUG_TAILQ_POSTREMOVE(elm, field) \
- (elm)->field.tqe_next = (void *)1L; \
- (elm)->field.tqe_prev = (void *)1L;
-#else
-#define QUEUEDEBUG_TAILQ_INSERT_HEAD(head, elm, field)
-#define QUEUEDEBUG_TAILQ_INSERT_TAIL(head, elm, field)
-#define QUEUEDEBUG_TAILQ_OP(elm, field)
-#define QUEUEDEBUG_TAILQ_PREREMOVE(head, elm, field)
-#define QUEUEDEBUG_TAILQ_POSTREMOVE(elm, field)
-#endif
-
-#define TAILQ_INIT(head) do { \
- (head)->tqh_first = NULL; \
- (head)->tqh_last = &(head)->tqh_first; \
-} while (/*CONSTCOND*/0)
-
-#define TAILQ_INSERT_HEAD(head, elm, field) do { \
- QUEUEDEBUG_TAILQ_INSERT_HEAD((head), (elm), field) \
- if (((elm)->field.tqe_next = (head)->tqh_first) != NULL) \
- (head)->tqh_first->field.tqe_prev = \
- &(elm)->field.tqe_next; \
- else \
- (head)->tqh_last = &(elm)->field.tqe_next; \
- (head)->tqh_first = (elm); \
- (elm)->field.tqe_prev = &(head)->tqh_first; \
-} while (/*CONSTCOND*/0)
-
-#define TAILQ_INSERT_TAIL(head, elm, field) do { \
- QUEUEDEBUG_TAILQ_INSERT_TAIL((head), (elm), field) \
- (elm)->field.tqe_next = NULL; \
- (elm)->field.tqe_prev = (head)->tqh_last; \
- *(head)->tqh_last = (elm); \
- (head)->tqh_last = &(elm)->field.tqe_next; \
-} while (/*CONSTCOND*/0)
-
-#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
- QUEUEDEBUG_TAILQ_OP((listelm), field) \
- if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\
- (elm)->field.tqe_next->field.tqe_prev = \
- &(elm)->field.tqe_next; \
- else \
- (head)->tqh_last = &(elm)->field.tqe_next; \
- (listelm)->field.tqe_next = (elm); \
- (elm)->field.tqe_prev = &(listelm)->field.tqe_next; \
-} while (/*CONSTCOND*/0)
-
-#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
- QUEUEDEBUG_TAILQ_OP((listelm), field) \
- (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
- (elm)->field.tqe_next = (listelm); \
- *(listelm)->field.tqe_prev = (elm); \
- (listelm)->field.tqe_prev = &(elm)->field.tqe_next; \
-} while (/*CONSTCOND*/0)
-
-#define TAILQ_REMOVE(head, elm, field) do { \
- QUEUEDEBUG_TAILQ_PREREMOVE((head), (elm), field) \
- QUEUEDEBUG_TAILQ_OP((elm), field) \
- if (((elm)->field.tqe_next) != NULL) \
- (elm)->field.tqe_next->field.tqe_prev = \
- (elm)->field.tqe_prev; \
- else \
- (head)->tqh_last = (elm)->field.tqe_prev; \
- *(elm)->field.tqe_prev = (elm)->field.tqe_next; \
- QUEUEDEBUG_TAILQ_POSTREMOVE((elm), field); \
-} while (/*CONSTCOND*/0)
-
-#define TAILQ_FOREACH(var, head, field) \
- for ((var) = ((head)->tqh_first); \
- (var); \
- (var) = ((var)->field.tqe_next))
-
-#define TAILQ_FOREACH_SAFE(var, head, field, next) \
- for ((var) = ((head)->tqh_first); \
- (var) != NULL && ((next) = TAILQ_NEXT(var, field), 1); \
- (var) = (next))
-
-#define TAILQ_FOREACH_REVERSE(var, head, headname, field) \
- for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last)); \
- (var); \
- (var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
-
-#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, prev) \
- for ((var) = TAILQ_LAST((head), headname); \
- (var) && ((prev) = TAILQ_PREV((var), headname, field), 1);\
- (var) = (prev))
-
-#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)); \
- } \
-} while (/*CONSTCOND*/0)
-
-/*
- * Tail queue access methods.
- */
-#define TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
-#define TAILQ_FIRST(head) ((head)->tqh_first)
-#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
-
-#define TAILQ_LAST(head, headname) \
- (*(((struct headname *)((head)->tqh_last))->tqh_last))
-#define TAILQ_PREV(elm, headname, field) \
- (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
-
-
-/*
- * Circular queue definitions.
- */
-#if defined(_KERNEL) && defined(QUEUEDEBUG)
-#define QUEUEDEBUG_CIRCLEQ_HEAD(head, field) \
- if ((head)->cqh_first != (void *)(head) && \
- (head)->cqh_first->field.cqe_prev != (void *)(head)) \
- panic("CIRCLEQ head forw %p %s:%d", (head), \
- __FILE__, __LINE__); \
- if ((head)->cqh_last != (void *)(head) && \
- (head)->cqh_last->field.cqe_next != (void *)(head)) \
- panic("CIRCLEQ head back %p %s:%d", (head), \
- __FILE__, __LINE__);
-#define QUEUEDEBUG_CIRCLEQ_ELM(head, elm, field) \
- if ((elm)->field.cqe_next == (void *)(head)) { \
- if ((head)->cqh_last != (elm)) \
- panic("CIRCLEQ elm last %p %s:%d", (elm), \
- __FILE__, __LINE__); \
- } else { \
- if ((elm)->field.cqe_next->field.cqe_prev != (elm)) \
- panic("CIRCLEQ elm forw %p %s:%d", (elm), \
- __FILE__, __LINE__); \
- } \
- if ((elm)->field.cqe_prev == (void *)(head)) { \
- if ((head)->cqh_first != (elm)) \
- panic("CIRCLEQ elm first %p %s:%d", (elm), \
- __FILE__, __LINE__); \
- } else { \
- if ((elm)->field.cqe_prev->field.cqe_next != (elm)) \
- panic("CIRCLEQ elm prev %p %s:%d", (elm), \
- __FILE__, __LINE__); \
- }
-#define QUEUEDEBUG_CIRCLEQ_POSTREMOVE(elm, field) \
- (elm)->field.cqe_next = (void *)1L; \
- (elm)->field.cqe_prev = (void *)1L;
-#else
-#define QUEUEDEBUG_CIRCLEQ_HEAD(head, field)
-#define QUEUEDEBUG_CIRCLEQ_ELM(head, elm, field)
-#define QUEUEDEBUG_CIRCLEQ_POSTREMOVE(elm, field)
-#endif
-
-#define CIRCLEQ_HEAD(name, type) \
-struct name { \
- struct type *cqh_first; /* first element */ \
- struct type *cqh_last; /* last element */ \
-}
-
-#define CIRCLEQ_HEAD_INITIALIZER(head) \
- { (void *)&head, (void *)&head }
-
-#define CIRCLEQ_ENTRY(type) \
-struct { \
- struct type *cqe_next; /* next element */ \
- struct type *cqe_prev; /* previous element */ \
-}
-
-/*
- * Circular queue functions.
- */
-#define CIRCLEQ_INIT(head) do { \
- (head)->cqh_first = (void *)(head); \
- (head)->cqh_last = (void *)(head); \
-} while (/*CONSTCOND*/0)
-
-#define CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do { \
- QUEUEDEBUG_CIRCLEQ_HEAD((head), field) \
- QUEUEDEBUG_CIRCLEQ_ELM((head), (listelm), field) \
- (elm)->field.cqe_next = (listelm)->field.cqe_next; \
- (elm)->field.cqe_prev = (listelm); \
- if ((listelm)->field.cqe_next == (void *)(head)) \
- (head)->cqh_last = (elm); \
- else \
- (listelm)->field.cqe_next->field.cqe_prev = (elm); \
- (listelm)->field.cqe_next = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do { \
- QUEUEDEBUG_CIRCLEQ_HEAD((head), field) \
- QUEUEDEBUG_CIRCLEQ_ELM((head), (listelm), field) \
- (elm)->field.cqe_next = (listelm); \
- (elm)->field.cqe_prev = (listelm)->field.cqe_prev; \
- if ((listelm)->field.cqe_prev == (void *)(head)) \
- (head)->cqh_first = (elm); \
- else \
- (listelm)->field.cqe_prev->field.cqe_next = (elm); \
- (listelm)->field.cqe_prev = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define CIRCLEQ_INSERT_HEAD(head, elm, field) do { \
- QUEUEDEBUG_CIRCLEQ_HEAD((head), field) \
- (elm)->field.cqe_next = (head)->cqh_first; \
- (elm)->field.cqe_prev = (void *)(head); \
- if ((head)->cqh_last == (void *)(head)) \
- (head)->cqh_last = (elm); \
- else \
- (head)->cqh_first->field.cqe_prev = (elm); \
- (head)->cqh_first = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define CIRCLEQ_INSERT_TAIL(head, elm, field) do { \
- QUEUEDEBUG_CIRCLEQ_HEAD((head), field) \
- (elm)->field.cqe_next = (void *)(head); \
- (elm)->field.cqe_prev = (head)->cqh_last; \
- if ((head)->cqh_first == (void *)(head)) \
- (head)->cqh_first = (elm); \
- else \
- (head)->cqh_last->field.cqe_next = (elm); \
- (head)->cqh_last = (elm); \
-} while (/*CONSTCOND*/0)
-
-#define CIRCLEQ_REMOVE(head, elm, field) do { \
- QUEUEDEBUG_CIRCLEQ_HEAD((head), field) \
- QUEUEDEBUG_CIRCLEQ_ELM((head), (elm), field) \
- if ((elm)->field.cqe_next == (void *)(head)) \
- (head)->cqh_last = (elm)->field.cqe_prev; \
- else \
- (elm)->field.cqe_next->field.cqe_prev = \
- (elm)->field.cqe_prev; \
- if ((elm)->field.cqe_prev == (void *)(head)) \
- (head)->cqh_first = (elm)->field.cqe_next; \
- else \
- (elm)->field.cqe_prev->field.cqe_next = \
- (elm)->field.cqe_next; \
- QUEUEDEBUG_CIRCLEQ_POSTREMOVE((elm), field) \
-} while (/*CONSTCOND*/0)
-
-#define CIRCLEQ_FOREACH(var, head, field) \
- for ((var) = ((head)->cqh_first); \
- (var) != (const void *)(head); \
- (var) = ((var)->field.cqe_next))
-
-#define CIRCLEQ_FOREACH_REVERSE(var, head, field) \
- for ((var) = ((head)->cqh_last); \
- (var) != (const void *)(head); \
- (var) = ((var)->field.cqe_prev))
-
-/*
- * Circular queue access methods.
- */
-#define CIRCLEQ_EMPTY(head) ((head)->cqh_first == (void *)(head))
-#define CIRCLEQ_FIRST(head) ((head)->cqh_first)
-#define CIRCLEQ_LAST(head) ((head)->cqh_last)
-#define CIRCLEQ_NEXT(elm, field) ((elm)->field.cqe_next)
-#define CIRCLEQ_PREV(elm, field) ((elm)->field.cqe_prev)
-
-#define CIRCLEQ_LOOP_NEXT(head, elm, field) \
- (((elm)->field.cqe_next == (void *)(head)) \
- ? ((head)->cqh_first) \
- : (elm->field.cqe_next))
-#define CIRCLEQ_LOOP_PREV(head, elm, field) \
- (((elm)->field.cqe_prev == (void *)(head)) \
- ? ((head)->cqh_last) \
- : (elm->field.cqe_prev))
-
-#endif /* !_SYS_QUEUE_H_ */
projects / platform / upstream / nodejs.git / commitdiff