187 lines
6.7 KiB
C
187 lines
6.7 KiB
C
/*-
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Part of:
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* $FreeBSD: head/sys/sys/queue.h 251887 2013-06-18 02:57:56Z lstewart $
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*/
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#ifdef NTIMED_QUEUE_H
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#error "ntimed_queue.h included multiple times"
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#endif
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#define NTIMED_QUEUE_H
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/*
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* Tail queue declarations.
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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 functions.
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*/
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#define TAILQ_CONCAT(head1, head2, field) do { \
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if (!TAILQ_EMPTY(head2)) { \
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*(head1)->tqh_last = (head2)->tqh_first; \
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(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
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(head1)->tqh_last = (head2)->tqh_last; \
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TAILQ_INIT((head2)); \
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} \
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} while (0)
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#define TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
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#define TAILQ_FIRST(head) ((head)->tqh_first)
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#define TAILQ_FOREACH(var, head, field) \
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for ((var) = TAILQ_FIRST((head)); \
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(var); \
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(var) = TAILQ_NEXT((var), field))
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#define TAILQ_FOREACH_FROM(var, head, field) \
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for ((var) = ((var) ? (var) : TAILQ_FIRST((head))); \
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(var); \
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(var) = TAILQ_NEXT((var), field))
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#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
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for ((var) = TAILQ_FIRST((head)); \
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(var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
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(var) = (tvar))
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#define TAILQ_FOREACH_FROM_SAFE(var, head, field, tvar) \
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for ((var) = ((var) ? (var) : TAILQ_FIRST((head))); \
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(var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
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(var) = (tvar))
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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); \
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(var) = TAILQ_PREV((var), headname, field))
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#define TAILQ_FOREACH_REVERSE_FROM(var, head, headname, field) \
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for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname)); \
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(var); \
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(var) = TAILQ_PREV((var), headname, field))
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#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \
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for ((var) = TAILQ_LAST((head), headname); \
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(var) && ((tvar) = TAILQ_PREV((var), headname, field), 1); \
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(var) = (tvar))
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#define TAILQ_FOREACH_REVERSE_FROM_SAFE(var, head, headname, field, tvar) \
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for ((var) = ((var) ? (var) : TAILQ_LAST((head), headname)); \
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(var) && ((tvar) = TAILQ_PREV((var), headname, field), 1); \
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(var) = (tvar))
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#define TAILQ_INIT(head) do { \
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TAILQ_FIRST((head)) = NULL; \
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(head)->tqh_last = &TAILQ_FIRST((head)); \
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} while (0)
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#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
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if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field)) != NULL)\
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TAILQ_NEXT((elm), field)->field.tqe_prev = \
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&TAILQ_NEXT((elm), field); \
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else { \
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(head)->tqh_last = &TAILQ_NEXT((elm), field); \
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} \
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TAILQ_NEXT((listelm), field) = (elm); \
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(elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \
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} while (0)
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#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
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(elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
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TAILQ_NEXT((elm), field) = (listelm); \
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*(listelm)->field.tqe_prev = (elm); \
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(listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field); \
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} while (0)
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#define TAILQ_INSERT_HEAD(head, elm, field) do { \
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if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL) \
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TAILQ_FIRST((head))->field.tqe_prev = \
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&TAILQ_NEXT((elm), field); \
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else \
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(head)->tqh_last = &TAILQ_NEXT((elm), field); \
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TAILQ_FIRST((head)) = (elm); \
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(elm)->field.tqe_prev = &TAILQ_FIRST((head)); \
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} while (0)
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#define TAILQ_INSERT_TAIL(head, elm, field) do { \
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TAILQ_NEXT((elm), field) = 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 = &TAILQ_NEXT((elm), field); \
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} while (0)
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#define TAILQ_LAST(head, headname) \
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(*(((struct headname *)((head)->tqh_last))->tqh_last))
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#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
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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_REMOVE(head, elm, field) do { \
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if ((TAILQ_NEXT((elm), field)) != NULL) \
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TAILQ_NEXT((elm), field)->field.tqe_prev = \
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(elm)->field.tqe_prev; \
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else { \
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(head)->tqh_last = (elm)->field.tqe_prev; \
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} \
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*(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \
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} while (0)
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#define TAILQ_SWAP(head1, head2, type, field) do { \
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struct type *swap_first = (head1)->tqh_first; \
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struct type **swap_last = (head1)->tqh_last; \
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(head1)->tqh_first = (head2)->tqh_first; \
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(head1)->tqh_last = (head2)->tqh_last; \
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(head2)->tqh_first = swap_first; \
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(head2)->tqh_last = swap_last; \
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if ((swap_first = (head1)->tqh_first) != NULL) \
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swap_first->field.tqe_prev = &(head1)->tqh_first; \
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else \
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(head1)->tqh_last = &(head1)->tqh_first; \
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if ((swap_first = (head2)->tqh_first) != NULL) \
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swap_first->field.tqe_prev = &(head2)->tqh_first; \
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else \
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(head2)->tqh_last = &(head2)->tqh_first; \
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} while (0)
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