d4af9e693f
I have worked hard to reduce diffs against the vendor branch. One notable change in that respect is that we no longer prefer DSA over RSA - the reasons for doing so went away years ago. This may cause some surprises, as ssh will warn about unknown host keys even for hosts whose keys haven't changed. MFC after: 6 weeks
613 lines
20 KiB
C
613 lines
20 KiB
C
/* $OpenBSD: queue.h,v 1.32 2007/04/30 18:42:34 pedro Exp $ */
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/* $NetBSD: queue.h,v 1.11 1996/05/16 05:17:14 mycroft 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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/* OPENBSD ORIGINAL: sys/sys/queue.h */
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#ifndef _FAKE_QUEUE_H_
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#define _FAKE_QUEUE_H_
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/*
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* Require for OS/X and other platforms that have old/broken/incomplete
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* <sys/queue.h>.
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*/
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#undef SLIST_HEAD
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#undef SLIST_HEAD_INITIALIZER
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#undef SLIST_ENTRY
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#undef SLIST_FOREACH_PREVPTR
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#undef SLIST_FIRST
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#undef SLIST_END
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#undef SLIST_EMPTY
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#undef SLIST_NEXT
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#undef SLIST_FOREACH
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#undef SLIST_INIT
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#undef SLIST_INSERT_AFTER
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#undef SLIST_INSERT_HEAD
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#undef SLIST_REMOVE_HEAD
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#undef SLIST_REMOVE
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#undef SLIST_REMOVE_NEXT
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#undef LIST_HEAD
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#undef LIST_HEAD_INITIALIZER
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#undef LIST_ENTRY
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#undef LIST_FIRST
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#undef LIST_END
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#undef LIST_EMPTY
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#undef LIST_NEXT
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#undef LIST_FOREACH
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#undef LIST_INIT
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#undef LIST_INSERT_AFTER
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#undef LIST_INSERT_BEFORE
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#undef LIST_INSERT_HEAD
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#undef LIST_REMOVE
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#undef LIST_REPLACE
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#undef SIMPLEQ_HEAD
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#undef SIMPLEQ_HEAD_INITIALIZER
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#undef SIMPLEQ_ENTRY
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#undef SIMPLEQ_FIRST
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#undef SIMPLEQ_END
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#undef SIMPLEQ_EMPTY
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#undef SIMPLEQ_NEXT
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#undef SIMPLEQ_FOREACH
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#undef SIMPLEQ_INIT
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#undef SIMPLEQ_INSERT_HEAD
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#undef SIMPLEQ_INSERT_TAIL
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#undef SIMPLEQ_INSERT_AFTER
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#undef SIMPLEQ_REMOVE_HEAD
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#undef TAILQ_HEAD
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#undef TAILQ_HEAD_INITIALIZER
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#undef TAILQ_ENTRY
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#undef TAILQ_FIRST
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#undef TAILQ_END
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#undef TAILQ_NEXT
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#undef TAILQ_LAST
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#undef TAILQ_PREV
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#undef TAILQ_EMPTY
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#undef TAILQ_FOREACH
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#undef TAILQ_FOREACH_REVERSE
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#undef TAILQ_INIT
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#undef TAILQ_INSERT_HEAD
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#undef TAILQ_INSERT_TAIL
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#undef TAILQ_INSERT_AFTER
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#undef TAILQ_INSERT_BEFORE
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#undef TAILQ_REMOVE
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#undef TAILQ_REPLACE
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#undef CIRCLEQ_HEAD
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#undef CIRCLEQ_HEAD_INITIALIZER
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#undef CIRCLEQ_ENTRY
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#undef CIRCLEQ_FIRST
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#undef CIRCLEQ_LAST
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#undef CIRCLEQ_END
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#undef CIRCLEQ_NEXT
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#undef CIRCLEQ_PREV
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#undef CIRCLEQ_EMPTY
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#undef CIRCLEQ_FOREACH
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#undef CIRCLEQ_FOREACH_REVERSE
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#undef CIRCLEQ_INIT
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#undef CIRCLEQ_INSERT_AFTER
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#undef CIRCLEQ_INSERT_BEFORE
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#undef CIRCLEQ_INSERT_HEAD
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#undef CIRCLEQ_INSERT_TAIL
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#undef CIRCLEQ_REMOVE
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#undef CIRCLEQ_REPLACE
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/*
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* This file defines five types of data structures: singly-linked lists,
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* lists, simple queues, tail queues, and circular queues.
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*
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*
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* A singly-linked list is headed by a single forward pointer. The elements
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* are singly linked for minimum space and pointer manipulation overhead at
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* the expense of O(n) removal for arbitrary elements. New elements can be
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* added to the list after an existing element or at the head of the list.
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* Elements being removed from the head of the list should use the explicit
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* macro for this purpose for optimum efficiency. A singly-linked list may
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* only be traversed in the forward direction. Singly-linked lists are ideal
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* for applications with large datasets and few or no removals or for
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* implementing a LIFO queue.
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*
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* A list is headed by a single forward pointer (or an array of forward
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* pointers for a hash table header). The elements are doubly linked
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* so that an arbitrary element can be removed without a need to
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* traverse the list. New elements can be added to the list before
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* or after an existing element or at the head of the list. A list
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* may only be traversed in the forward direction.
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*
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* A simple queue is headed by a pair of pointers, one the head of the
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* list and the other to the tail of the list. The elements are singly
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* linked to save space, so elements can only be removed from the
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* head of the list. New elements can be added to the list before or after
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* an existing element, at the head of the list, or at the end of the
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* list. A simple queue may only be traversed in the forward direction.
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*
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* A tail queue is headed by a pair of pointers, one to the head of the
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* list and the other to the tail of the list. The elements are doubly
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* linked so that an arbitrary element can be removed without a need to
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* traverse the list. New elements can be added to the list before or
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* after an existing element, at the head of the list, or at the end of
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* the list. A tail queue may be traversed in either direction.
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*
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* A circle queue is headed by a pair of pointers, one to the head of the
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* list and the other to the tail of the list. The elements are doubly
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* linked so that an arbitrary element can be removed without a need to
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* traverse the list. New elements can be added to the list before or after
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* an existing element, at the head of the list, or at the end of the list.
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* A circle queue may be traversed in either direction, but has a more
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* complex end of list detection.
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*
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* For details on the use of these macros, see the queue(3) manual page.
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*/
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#if defined(QUEUE_MACRO_DEBUG) || (defined(_KERNEL) && defined(DIAGNOSTIC))
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#define _Q_INVALIDATE(a) (a) = ((void *)-1)
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#else
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#define _Q_INVALIDATE(a)
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#endif
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/*
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* Singly-linked List definitions.
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*/
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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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#define SLIST_HEAD_INITIALIZER(head) \
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{ NULL }
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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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/*
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* Singly-linked List access methods.
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*/
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#define SLIST_FIRST(head) ((head)->slh_first)
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#define SLIST_END(head) NULL
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#define SLIST_EMPTY(head) (SLIST_FIRST(head) == SLIST_END(head))
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#define SLIST_NEXT(elm, field) ((elm)->field.sle_next)
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#define SLIST_FOREACH(var, head, field) \
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for((var) = SLIST_FIRST(head); \
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(var) != SLIST_END(head); \
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(var) = SLIST_NEXT(var, field))
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#define SLIST_FOREACH_PREVPTR(var, varp, head, field) \
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for ((varp) = &SLIST_FIRST((head)); \
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((var) = *(varp)) != SLIST_END(head); \
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(varp) = &SLIST_NEXT((var), field))
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/*
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* Singly-linked List functions.
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*/
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#define SLIST_INIT(head) { \
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SLIST_FIRST(head) = SLIST_END(head); \
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}
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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 (0)
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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 (0)
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#define SLIST_REMOVE_NEXT(head, elm, field) do { \
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(elm)->field.sle_next = (elm)->field.sle_next->field.sle_next; \
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} while (0)
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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 (0)
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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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} else { \
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struct type *curelm = (head)->slh_first; \
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\
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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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_Q_INVALIDATE((elm)->field.sle_next); \
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} \
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} while (0)
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/*
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* List definitions.
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*/
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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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#define LIST_HEAD_INITIALIZER(head) \
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{ NULL }
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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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/*
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* List access methods
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*/
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#define LIST_FIRST(head) ((head)->lh_first)
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#define LIST_END(head) NULL
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#define LIST_EMPTY(head) (LIST_FIRST(head) == LIST_END(head))
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#define LIST_NEXT(elm, field) ((elm)->field.le_next)
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#define LIST_FOREACH(var, head, field) \
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for((var) = LIST_FIRST(head); \
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(var)!= LIST_END(head); \
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(var) = LIST_NEXT(var, field))
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/*
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* List functions.
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*/
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#define LIST_INIT(head) do { \
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LIST_FIRST(head) = LIST_END(head); \
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} while (0)
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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 (0)
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#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
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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 (0)
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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 (0)
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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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_Q_INVALIDATE((elm)->field.le_prev); \
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_Q_INVALIDATE((elm)->field.le_next); \
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} while (0)
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#define LIST_REPLACE(elm, elm2, field) do { \
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if (((elm2)->field.le_next = (elm)->field.le_next) != NULL) \
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(elm2)->field.le_next->field.le_prev = \
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&(elm2)->field.le_next; \
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(elm2)->field.le_prev = (elm)->field.le_prev; \
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*(elm2)->field.le_prev = (elm2); \
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_Q_INVALIDATE((elm)->field.le_prev); \
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_Q_INVALIDATE((elm)->field.le_next); \
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} while (0)
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/*
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* Simple queue definitions.
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*/
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#define SIMPLEQ_HEAD(name, type) \
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struct name { \
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struct type *sqh_first; /* first element */ \
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struct type **sqh_last; /* addr of last next element */ \
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}
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#define SIMPLEQ_HEAD_INITIALIZER(head) \
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{ NULL, &(head).sqh_first }
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#define SIMPLEQ_ENTRY(type) \
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struct { \
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struct type *sqe_next; /* next element */ \
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}
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/*
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* Simple queue access methods.
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*/
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#define SIMPLEQ_FIRST(head) ((head)->sqh_first)
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#define SIMPLEQ_END(head) NULL
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#define SIMPLEQ_EMPTY(head) (SIMPLEQ_FIRST(head) == SIMPLEQ_END(head))
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#define SIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next)
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#define SIMPLEQ_FOREACH(var, head, field) \
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for((var) = SIMPLEQ_FIRST(head); \
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(var) != SIMPLEQ_END(head); \
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(var) = SIMPLEQ_NEXT(var, field))
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/*
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* Simple queue functions.
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*/
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#define SIMPLEQ_INIT(head) do { \
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(head)->sqh_first = NULL; \
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(head)->sqh_last = &(head)->sqh_first; \
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} while (0)
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#define SIMPLEQ_INSERT_HEAD(head, elm, field) do { \
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if (((elm)->field.sqe_next = (head)->sqh_first) == NULL) \
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(head)->sqh_last = &(elm)->field.sqe_next; \
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(head)->sqh_first = (elm); \
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} while (0)
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#define SIMPLEQ_INSERT_TAIL(head, elm, field) do { \
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(elm)->field.sqe_next = NULL; \
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*(head)->sqh_last = (elm); \
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(head)->sqh_last = &(elm)->field.sqe_next; \
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} while (0)
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#define SIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do { \
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if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL)\
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(head)->sqh_last = &(elm)->field.sqe_next; \
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(listelm)->field.sqe_next = (elm); \
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} while (0)
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#define SIMPLEQ_REMOVE_HEAD(head, field) do { \
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if (((head)->sqh_first = (head)->sqh_first->field.sqe_next) == NULL) \
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(head)->sqh_last = &(head)->sqh_first; \
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} while (0)
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/*
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* Tail queue definitions.
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*/
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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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#define TAILQ_HEAD_INITIALIZER(head) \
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{ NULL, &(head).tqh_first }
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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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/*
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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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/* XXX */
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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) \
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(TAILQ_FIRST(head) == TAILQ_END(head))
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#define TAILQ_FOREACH(var, head, field) \
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for((var) = TAILQ_FIRST(head); \
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(var) != TAILQ_END(head); \
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(var) = TAILQ_NEXT(var, field))
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#define TAILQ_FOREACH_REVERSE(var, head, headname, field) \
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for((var) = TAILQ_LAST(head, headname); \
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(var) != TAILQ_END(head); \
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(var) = TAILQ_PREV(var, headname, field))
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/*
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* Tail queue functions.
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*/
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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 (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) != 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 (0)
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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; \
|
|
} while (0)
|
|
|
|
#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
|
|
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 (0)
|
|
|
|
#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
|
|
(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 (0)
|
|
|
|
#define TAILQ_REMOVE(head, elm, field) do { \
|
|
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; \
|
|
_Q_INVALIDATE((elm)->field.tqe_prev); \
|
|
_Q_INVALIDATE((elm)->field.tqe_next); \
|
|
} while (0)
|
|
|
|
#define TAILQ_REPLACE(head, elm, elm2, field) do { \
|
|
if (((elm2)->field.tqe_next = (elm)->field.tqe_next) != NULL) \
|
|
(elm2)->field.tqe_next->field.tqe_prev = \
|
|
&(elm2)->field.tqe_next; \
|
|
else \
|
|
(head)->tqh_last = &(elm2)->field.tqe_next; \
|
|
(elm2)->field.tqe_prev = (elm)->field.tqe_prev; \
|
|
*(elm2)->field.tqe_prev = (elm2); \
|
|
_Q_INVALIDATE((elm)->field.tqe_prev); \
|
|
_Q_INVALIDATE((elm)->field.tqe_next); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Circular queue definitions.
|
|
*/
|
|
#define CIRCLEQ_HEAD(name, type) \
|
|
struct name { \
|
|
struct type *cqh_first; /* first element */ \
|
|
struct type *cqh_last; /* last element */ \
|
|
}
|
|
|
|
#define CIRCLEQ_HEAD_INITIALIZER(head) \
|
|
{ CIRCLEQ_END(&head), CIRCLEQ_END(&head) }
|
|
|
|
#define CIRCLEQ_ENTRY(type) \
|
|
struct { \
|
|
struct type *cqe_next; /* next element */ \
|
|
struct type *cqe_prev; /* previous element */ \
|
|
}
|
|
|
|
/*
|
|
* Circular queue access methods
|
|
*/
|
|
#define CIRCLEQ_FIRST(head) ((head)->cqh_first)
|
|
#define CIRCLEQ_LAST(head) ((head)->cqh_last)
|
|
#define CIRCLEQ_END(head) ((void *)(head))
|
|
#define CIRCLEQ_NEXT(elm, field) ((elm)->field.cqe_next)
|
|
#define CIRCLEQ_PREV(elm, field) ((elm)->field.cqe_prev)
|
|
#define CIRCLEQ_EMPTY(head) \
|
|
(CIRCLEQ_FIRST(head) == CIRCLEQ_END(head))
|
|
|
|
#define CIRCLEQ_FOREACH(var, head, field) \
|
|
for((var) = CIRCLEQ_FIRST(head); \
|
|
(var) != CIRCLEQ_END(head); \
|
|
(var) = CIRCLEQ_NEXT(var, field))
|
|
|
|
#define CIRCLEQ_FOREACH_REVERSE(var, head, field) \
|
|
for((var) = CIRCLEQ_LAST(head); \
|
|
(var) != CIRCLEQ_END(head); \
|
|
(var) = CIRCLEQ_PREV(var, field))
|
|
|
|
/*
|
|
* Circular queue functions.
|
|
*/
|
|
#define CIRCLEQ_INIT(head) do { \
|
|
(head)->cqh_first = CIRCLEQ_END(head); \
|
|
(head)->cqh_last = CIRCLEQ_END(head); \
|
|
} while (0)
|
|
|
|
#define CIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do { \
|
|
(elm)->field.cqe_next = (listelm)->field.cqe_next; \
|
|
(elm)->field.cqe_prev = (listelm); \
|
|
if ((listelm)->field.cqe_next == CIRCLEQ_END(head)) \
|
|
(head)->cqh_last = (elm); \
|
|
else \
|
|
(listelm)->field.cqe_next->field.cqe_prev = (elm); \
|
|
(listelm)->field.cqe_next = (elm); \
|
|
} while (0)
|
|
|
|
#define CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do { \
|
|
(elm)->field.cqe_next = (listelm); \
|
|
(elm)->field.cqe_prev = (listelm)->field.cqe_prev; \
|
|
if ((listelm)->field.cqe_prev == CIRCLEQ_END(head)) \
|
|
(head)->cqh_first = (elm); \
|
|
else \
|
|
(listelm)->field.cqe_prev->field.cqe_next = (elm); \
|
|
(listelm)->field.cqe_prev = (elm); \
|
|
} while (0)
|
|
|
|
#define CIRCLEQ_INSERT_HEAD(head, elm, field) do { \
|
|
(elm)->field.cqe_next = (head)->cqh_first; \
|
|
(elm)->field.cqe_prev = CIRCLEQ_END(head); \
|
|
if ((head)->cqh_last == CIRCLEQ_END(head)) \
|
|
(head)->cqh_last = (elm); \
|
|
else \
|
|
(head)->cqh_first->field.cqe_prev = (elm); \
|
|
(head)->cqh_first = (elm); \
|
|
} while (0)
|
|
|
|
#define CIRCLEQ_INSERT_TAIL(head, elm, field) do { \
|
|
(elm)->field.cqe_next = CIRCLEQ_END(head); \
|
|
(elm)->field.cqe_prev = (head)->cqh_last; \
|
|
if ((head)->cqh_first == CIRCLEQ_END(head)) \
|
|
(head)->cqh_first = (elm); \
|
|
else \
|
|
(head)->cqh_last->field.cqe_next = (elm); \
|
|
(head)->cqh_last = (elm); \
|
|
} while (0)
|
|
|
|
#define CIRCLEQ_REMOVE(head, elm, field) do { \
|
|
if ((elm)->field.cqe_next == CIRCLEQ_END(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 == CIRCLEQ_END(head)) \
|
|
(head)->cqh_first = (elm)->field.cqe_next; \
|
|
else \
|
|
(elm)->field.cqe_prev->field.cqe_next = \
|
|
(elm)->field.cqe_next; \
|
|
_Q_INVALIDATE((elm)->field.cqe_prev); \
|
|
_Q_INVALIDATE((elm)->field.cqe_next); \
|
|
} while (0)
|
|
|
|
#define CIRCLEQ_REPLACE(head, elm, elm2, field) do { \
|
|
if (((elm2)->field.cqe_next = (elm)->field.cqe_next) == \
|
|
CIRCLEQ_END(head)) \
|
|
(head).cqh_last = (elm2); \
|
|
else \
|
|
(elm2)->field.cqe_next->field.cqe_prev = (elm2); \
|
|
if (((elm2)->field.cqe_prev = (elm)->field.cqe_prev) == \
|
|
CIRCLEQ_END(head)) \
|
|
(head).cqh_first = (elm2); \
|
|
else \
|
|
(elm2)->field.cqe_prev->field.cqe_next = (elm2); \
|
|
_Q_INVALIDATE((elm)->field.cqe_prev); \
|
|
_Q_INVALIDATE((elm)->field.cqe_next); \
|
|
} while (0)
|
|
|
|
#endif /* !_FAKE_QUEUE_H_ */
|