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555 lines
27 KiB
C
555 lines
27 KiB
C
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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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* $FreeBSD: stable/9/sys/sys/queue.h 252365 2013-06-29 04:25:40Z lstewart $
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*/
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#ifndef QUEUE_H
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#define QUEUE_H
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/* #include <sys/cdefs.h> */
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#define __containerof(ptr, type, field) ((type *)((char *)(ptr) - ((char *)&((type *)0)->field)))
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/*
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* This file defines four types of data structures: singly-linked lists,
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* singly-linked tail queues, lists and tail queues.
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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 singly-linked tail queue is headed by a pair of pointers, one to the
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* head of the list and the other to the tail of the list. The elements are
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* singly linked for minimum space and pointer manipulation overhead at the
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* expense of O(n) removal for arbitrary elements. New elements can be added
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* to the list after an existing element, at the head of the list, or at the
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* end of the list. Elements being removed from the head of the tail queue
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* should use the explicit macro for this purpose for optimum efficiency.
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* A singly-linked tail queue may only be traversed in the forward direction.
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* Singly-linked tail queues are ideal for applications with large datasets
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* and few or no removals or for implementing a FIFO 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 be traversed in either 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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* For details on the use of these macros, see the queue(3) manual page.
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*
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* SLIST LIST STAILQ TAILQ
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* _HEAD + + + +
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* _HEAD_INITIALIZER + + + +
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* _ENTRY + + + +
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* _INIT + + + +
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* _EMPTY + + + +
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* _FIRST + + + +
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* _NEXT + + + +
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* _PREV - + - +
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* _LAST - - + +
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* _FOREACH + + + +
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* _FOREACH_FROM + + + +
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* _FOREACH_SAFE + + + +
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* _FOREACH_FROM_SAFE + + + +
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* _FOREACH_REVERSE - - - +
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* _FOREACH_REVERSE_FROM - - - +
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* _FOREACH_REVERSE_SAFE - - - +
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* _FOREACH_REVERSE_FROM_SAFE - - - +
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* _INSERT_HEAD + + + +
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* _INSERT_BEFORE - + - +
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* _INSERT_AFTER + + + +
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* _INSERT_TAIL - - + +
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* _CONCAT - - + +
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* _REMOVE_AFTER + - + -
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* _REMOVE_HEAD + - + -
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* _REMOVE + + + +
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* _SWAP + + + +
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*
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*/
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/*
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* Singly-linked List declarations.
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*/
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#define SLIST_HEAD(name, type, qual) \
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struct name { \
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struct type *qual 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, qual) \
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struct { \
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struct type *qual sle_next; /* next element */ \
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}
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/*
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* Singly-linked List functions.
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*/
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#define SLIST_INIT(head) do { \
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SLIST_FIRST((head)) = NULL; \
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} while (0)
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#define SLIST_EMPTY(head) ((head)->slh_first == NULL)
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#define SLIST_FIRST(head) ((head)->slh_first)
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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); \
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(var) = SLIST_NEXT((var), field))
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#define SLIST_FOREACH_FROM(var, head, field) \
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for ((var) = ((var) ? (var) : SLIST_FIRST((head))); \
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(var); \
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(var) = SLIST_NEXT((var), field))
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#define SLIST_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = SLIST_FIRST((head)); \
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(var) && ((tvar) = SLIST_NEXT((var), field), 1); \
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(var) = (tvar))
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#define SLIST_FOREACH_FROM_SAFE(var, head, field, tvar) \
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for ((var) = ((var) ? (var) : SLIST_FIRST((head))); \
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(var) && ((tvar) = SLIST_NEXT((var), field), 1); \
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(var) = (tvar))
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#define SLIST_INSERT_HEAD(head, elm, field) do { \
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SLIST_NEXT((elm), field) = SLIST_FIRST((head)); \
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SLIST_FIRST((head)) = (elm); \
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} while (0)
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#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \
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SLIST_NEXT((elm), field) = SLIST_NEXT((slistelm), field); \
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SLIST_NEXT((slistelm), field) = (elm); \
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} while (0)
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#define SLIST_REMOVE_AFTER(elm, field) do { \
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SLIST_NEXT(elm, field) = \
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SLIST_NEXT(SLIST_NEXT(elm, field), field); \
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} while (0)
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#define SLIST_REMOVE_HEAD(head, field) do { \
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SLIST_FIRST((head)) = SLIST_NEXT(SLIST_FIRST((head)), field); \
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} while (0)
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#define SLIST_REMOVE(head, elm, type, field) do { \
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if (SLIST_FIRST((head)) == (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 = SLIST_FIRST((head)); \
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while (SLIST_NEXT(curelm, field) != (elm)) \
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curelm = SLIST_NEXT(curelm, field); \
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SLIST_REMOVE_AFTER(curelm, field); \
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} \
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} while (0)
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#define SLIST_SWAP(head1, head2, type) do { \
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struct type *swap_first = SLIST_FIRST(head1); \
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SLIST_FIRST(head1) = SLIST_FIRST(head2); \
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SLIST_FIRST(head2) = swap_first; \
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} while (0)
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/*
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* List declarations.
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*/
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#define LIST_HEAD(name, type, qual) \
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struct name { \
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struct type *qual 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, qual) \
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struct { \
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struct type *qual le_next; /* next element */ \
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struct type *qual *le_prev; /* address of previous next element */ \
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}
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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)) = NULL; \
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} while (0)
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#define LIST_EMPTY(head) ((head)->lh_first == NULL)
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#define LIST_FIRST(head) ((head)->lh_first)
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#define LIST_NEXT(elm, field) ((elm)->field.le_next)
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#define LIST_PREV(elm, head, type, field) \
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((elm)->field.le_prev == &LIST_FIRST((head)) ? NULL : \
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__containerof((elm)->field.le_prev, struct type, 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); \
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(var) = LIST_NEXT((var), field))
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#define LIST_FOREACH_FROM(var, head, field) \
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for ((var) = ((var) ? (var) : LIST_FIRST((head))); \
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(var); \
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(var) = LIST_NEXT((var), field))
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#define LIST_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = LIST_FIRST((head)); \
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(var) && ((tvar) = LIST_NEXT((var), field), 1); \
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(var) = (tvar))
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#define LIST_FOREACH_FROM_SAFE(var, head, field, tvar) \
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for ((var) = ((var) ? (var) : LIST_FIRST((head))); \
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(var) && ((tvar) = LIST_NEXT((var), field), 1); \
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(var) = (tvar))
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#define LIST_INSERT_HEAD(head, elm, field) do { \
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if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \
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LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field); \
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LIST_FIRST((head)) = (elm); \
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(elm)->field.le_prev = &LIST_FIRST((head)); \
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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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LIST_NEXT((elm), field) = (listelm); \
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*(listelm)->field.le_prev = (elm); \
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(listelm)->field.le_prev = &LIST_NEXT((elm), field); \
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} while (0)
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#define LIST_INSERT_AFTER(listelm, elm, field) do { \
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if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL) \
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LIST_NEXT((listelm), field)->field.le_prev = \
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&LIST_NEXT((elm), field); \
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LIST_NEXT((listelm), field) = (elm); \
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(elm)->field.le_prev = &LIST_NEXT((listelm), field); \
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} while (0)
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#define LIST_REMOVE(elm, field) do { \
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if (LIST_NEXT((elm), field) != NULL) \
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LIST_NEXT((elm), field)->field.le_prev = \
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(elm)->field.le_prev; \
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*(elm)->field.le_prev = LIST_NEXT((elm), field); \
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} while (0)
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#define LIST_SWAP(head1, head2, type, field) do { \
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struct type *swap_tmp = LIST_FIRST((head1)); \
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LIST_FIRST((head1)) = LIST_FIRST((head2)); \
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LIST_FIRST((head2)) = swap_tmp; \
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if ((swap_tmp = LIST_FIRST((head1))) != NULL) \
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swap_tmp->field.le_prev = &LIST_FIRST((head1)); \
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if ((swap_tmp = LIST_FIRST((head2))) != NULL) \
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swap_tmp->field.le_prev = &LIST_FIRST((head2)); \
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} while (0)
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/*
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* Singly-linked Tail queue declarations.
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*/
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#define STAILQ_HEAD(name, type, qual) \
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struct name { \
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struct type *qual stqh_first;/* first element */ \
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struct type *qual *stqh_last;/* addr of last next element */ \
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}
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#define STAILQ_HEAD_INITIALIZER(head) \
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{ NULL, &(head).stqh_first }
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#define STAILQ_ENTRY(type, qual) \
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struct { \
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struct type *qual stqe_next; /* next element */ \
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}
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/*
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* Singly-linked Tail queue functions.
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*/
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#define STAILQ_INIT(head) do { \
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STAILQ_FIRST((head)) = NULL; \
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(head)->stqh_last = &STAILQ_FIRST((head)); \
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} while (0)
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#define STAILQ_EMPTY(head) ((head)->stqh_first == NULL)
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#define STAILQ_FIRST(head) ((head)->stqh_first)
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#define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
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#define STAILQ_LAST(head, type, field) \
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(STAILQ_EMPTY((head)) ? NULL : \
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__containerof((head)->stqh_last, struct type, field.stqe_next))
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#define STAILQ_FOREACH(var, head, field) \
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for((var) = STAILQ_FIRST((head)); \
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(var); \
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(var) = STAILQ_NEXT((var), field))
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#define STAILQ_FOREACH_FROM(var, head, field) \
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for ((var) = ((var) ? (var) : STAILQ_FIRST((head))); \
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(var); \
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(var) = STAILQ_NEXT((var), field))
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#define STAILQ_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = STAILQ_FIRST((head)); \
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(var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
|
||
|
|
(var) = (tvar))
|
||
|
|
|
||
|
|
#define STAILQ_FOREACH_FROM_SAFE(var, head, field, tvar) \
|
||
|
|
for ((var) = ((var) ? (var) : STAILQ_FIRST((head))); \
|
||
|
|
(var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
|
||
|
|
(var) = (tvar))
|
||
|
|
|
||
|
|
#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_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_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_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_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_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(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); \
|
||
|
|
} \
|
||
|
|
} 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)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Tail queue declarations.
|
||
|
|
*/
|
||
|
|
#define TAILQ_HEAD(name, type, qual) \
|
||
|
|
struct name { \
|
||
|
|
struct type *qual tqh_first; /* first element */ \
|
||
|
|
struct type *qual *tqh_last; /* addr of last next element */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define TAILQ_HEAD_INITIALIZER(head) \
|
||
|
|
{ NULL, &(head).tqh_first }
|
||
|
|
|
||
|
|
#define TAILQ_ENTRY(type, qual) \
|
||
|
|
struct { \
|
||
|
|
struct type *qual tqe_next; /* next element */ \
|
||
|
|
struct type *qual *tqe_prev; /* address of previous next element */ \
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Tail queue functions.
|
||
|
|
*/
|
||
|
|
#define TAILQ_INIT(head) do { \
|
||
|
|
TAILQ_FIRST((head)) = NULL; \
|
||
|
|
(head)->tqh_last = &TAILQ_FIRST((head)); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#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_PREV(elm, headname, field) \
|
||
|
|
(*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
|
||
|
|
|
||
|
|
#define TAILQ_LAST(head, headname) \
|
||
|
|
(*(((struct headname *)((head)->tqh_last))->tqh_last))
|
||
|
|
|
||
|
|
#define TAILQ_FOREACH(var, head, field) \
|
||
|
|
for ((var) = TAILQ_FIRST((head)); \
|
||
|
|
(var); \
|
||
|
|
(var) = TAILQ_NEXT((var), field))
|
||
|
|
|
||
|
|
#define TAILQ_FOREACH_FROM(var, head, field) \
|
||
|
|
for ((var) = ((var) ? (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_FROM_SAFE(var, head, field, tvar) \
|
||
|
|
for ((var) = ((var) ? (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_FROM(var, head, headname, field) \
|
||
|
|
for ((var) = ((var) ? (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_FOREACH_REVERSE_FROM_SAFE(var, head, headname, field, tvar) \
|
||
|
|
for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname)); \
|
||
|
|
(var) && ((tvar) = TAILQ_PREV((var), headname, field), 1); \
|
||
|
|
(var) = (tvar))
|
||
|
|
|
||
|
|
#define TAILQ_INSERT_HEAD(head, elm, field) do { \
|
||
|
|
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)); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
|
||
|
|
(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); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
|
||
|
|
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); \
|
||
|
|
TAILQ_NEXT((listelm), field) = (elm); \
|
||
|
|
(elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define TAILQ_INSERT_TAIL(head, elm, field) do { \
|
||
|
|
TAILQ_NEXT((elm), field) = NULL; \
|
||
|
|
(elm)->field.tqe_prev = (head)->tqh_last; \
|
||
|
|
*(head)->tqh_last = (elm); \
|
||
|
|
(head)->tqh_last = &TAILQ_NEXT((elm), field); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#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 (0)
|
||
|
|
|
||
|
|
#define TAILQ_REMOVE(head, elm, field) do { \
|
||
|
|
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; \
|
||
|
|
*(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#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
|