1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/genericopenlibs/openenvcore/include/sys/queue.h Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,548 @@
1.4 +/*-
1.5 + * Copyright (c) 1991, 1993
1.6 + * The Regents of the University of California. All rights reserved.
1.7 + *
1.8 + * Redistribution and use in source and binary forms, with or without
1.9 + * modification, are permitted provided that the following conditions
1.10 + * are met:
1.11 + * 1. Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + * 2. Redistributions in binary form must reproduce the above copyright
1.14 + * notice, this list of conditions and the following disclaimer in the
1.15 + * documentation and/or other materials provided with the distribution.
1.16 + * 4. Neither the name of the University nor the names of its contributors
1.17 + * may be used to endorse or promote products derived from this software
1.18 + * without specific prior written permission.
1.19 + *
1.20 + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1.21 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.22 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.23 + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1.24 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.25 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.26 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.27 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.28 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.29 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.30 + * SUCH DAMAGE.
1.31 + * © * © * Portions Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
1.32 + * @(#)queue.h 8.5 (Berkeley) 8/20/94
1.33 + * $FreeBSD: src/sys/sys/queue.h,v 1.60.2.1 2005/08/16 22:41:39 phk Exp $
1.34 + */
1.35 +
1.36 +#ifndef _SYS_QUEUE_H_
1.37 +#define _SYS_QUEUE_H_
1.38 +
1.39 +#include <sys/cdefs.h>
1.40 +
1.41 +/*
1.42 + * This file defines four types of data structures: singly-linked lists,
1.43 + * singly-linked tail queues, lists and tail queues.
1.44 + *
1.45 + * A singly-linked list is headed by a single forward pointer. The elements
1.46 + * are singly linked for minimum space and pointer manipulation overhead at
1.47 + * the expense of O(n) removal for arbitrary elements. New elements can be
1.48 + * added to the list after an existing element or at the head of the list.
1.49 + * Elements being removed from the head of the list should use the explicit
1.50 + * macro for this purpose for optimum efficiency. A singly-linked list may
1.51 + * only be traversed in the forward direction. Singly-linked lists are ideal
1.52 + * for applications with large datasets and few or no removals or for
1.53 + * implementing a LIFO queue.
1.54 + *
1.55 + * A singly-linked tail queue is headed by a pair of pointers, one to the
1.56 + * head of the list and the other to the tail of the list. The elements are
1.57 + * singly linked for minimum space and pointer manipulation overhead at the
1.58 + * expense of O(n) removal for arbitrary elements. New elements can be added
1.59 + * to the list after an existing element, at the head of the list, or at the
1.60 + * end of the list. Elements being removed from the head of the tail queue
1.61 + * should use the explicit macro for this purpose for optimum efficiency.
1.62 + * A singly-linked tail queue may only be traversed in the forward direction.
1.63 + * Singly-linked tail queues are ideal for applications with large datasets
1.64 + * and few or no removals or for implementing a FIFO queue.
1.65 + *
1.66 + * A list is headed by a single forward pointer (or an array of forward
1.67 + * pointers for a hash table header). The elements are doubly linked
1.68 + * so that an arbitrary element can be removed without a need to
1.69 + * traverse the list. New elements can be added to the list before
1.70 + * or after an existing element or at the head of the list. A list
1.71 + * may only be traversed in the forward direction.
1.72 + *
1.73 + * A tail queue is headed by a pair of pointers, one to the head of the
1.74 + * list and the other to the tail of the list. The elements are doubly
1.75 + * linked so that an arbitrary element can be removed without a need to
1.76 + * traverse the list. New elements can be added to the list before or
1.77 + * after an existing element, at the head of the list, or at the end of
1.78 + * the list. A tail queue may be traversed in either direction.
1.79 + *
1.80 + * For details on the use of these macros, see the queue(3) manual page.
1.81 + *
1.82 + *
1.83 + * SLIST LIST STAILQ TAILQ
1.84 + * _HEAD + + + +
1.85 + * _HEAD_INITIALIZER + + + +
1.86 + * _ENTRY + + + +
1.87 + * _INIT + + + +
1.88 + * _EMPTY + + + +
1.89 + * _FIRST + + + +
1.90 + * _NEXT + + + +
1.91 + * _PREV - - - +
1.92 + * _LAST - - + +
1.93 + * _FOREACH + + + +
1.94 + * _FOREACH_SAFE + + + +
1.95 + * _FOREACH_REVERSE - - - +
1.96 + * _FOREACH_REVERSE_SAFE - - - +
1.97 + * _INSERT_HEAD + + + +
1.98 + * _INSERT_BEFORE - + - +
1.99 + * _INSERT_AFTER + + + +
1.100 + * _INSERT_TAIL - - + +
1.101 + * _CONCAT - - + +
1.102 + * _REMOVE_HEAD + - + -
1.103 + * _REMOVE + + + +
1.104 + *
1.105 + */
1.106 +#define QUEUE_MACRO_DEBUG 0
1.107 +#if QUEUE_MACRO_DEBUG
1.108 +/* Store the last 2 places the queue element or head was altered */
1.109 +struct qm_trace {
1.110 + char * lastfile;
1.111 + int lastline;
1.112 + char * prevfile;
1.113 + int prevline;
1.114 +};
1.115 +
1.116 +#define TRACEBUF struct qm_trace trace;
1.117 +#define TRASHIT(x) do {(x) = (void *)-1;} while (0)
1.118 +
1.119 +#define QMD_TRACE_HEAD(head) do { \
1.120 + (head)->trace.prevline = (head)->trace.lastline; \
1.121 + (head)->trace.prevfile = (head)->trace.lastfile; \
1.122 + (head)->trace.lastline = __LINE__; \
1.123 + (head)->trace.lastfile = __FILE__; \
1.124 +} while (0)
1.125 +
1.126 +#define QMD_TRACE_ELEM(elem) do { \
1.127 + (elem)->trace.prevline = (elem)->trace.lastline; \
1.128 + (elem)->trace.prevfile = (elem)->trace.lastfile; \
1.129 + (elem)->trace.lastline = __LINE__; \
1.130 + (elem)->trace.lastfile = __FILE__; \
1.131 +} while (0)
1.132 +
1.133 +#else
1.134 +#define QMD_TRACE_ELEM(elem)
1.135 +#define QMD_TRACE_HEAD(head)
1.136 +#define TRACEBUF
1.137 +#define TRASHIT(x)
1.138 +#endif /* QUEUE_MACRO_DEBUG */
1.139 +
1.140 +/*
1.141 + * Singly-linked List declarations.
1.142 + */
1.143 +#define SLIST_HEAD(name, type) \
1.144 +struct name { \
1.145 + struct type *slh_first; /* first element */ \
1.146 +}
1.147 +
1.148 +#define SLIST_HEAD_INITIALIZER(head) \
1.149 + { NULL }
1.150 +
1.151 +#define SLIST_ENTRY(type) \
1.152 +struct { \
1.153 + struct type *sle_next; /* next element */ \
1.154 +}
1.155 +
1.156 +/*
1.157 + * Singly-linked List functions.
1.158 + */
1.159 +#define SLIST_EMPTY(head) ((head)->slh_first == NULL)
1.160 +
1.161 +#define SLIST_FIRST(head) ((head)->slh_first)
1.162 +
1.163 +#define SLIST_FOREACH(var, head, field) \
1.164 + for ((var) = SLIST_FIRST((head)); \
1.165 + (var); \
1.166 + (var) = SLIST_NEXT((var), field))
1.167 +
1.168 +#define SLIST_FOREACH_SAFE(var, head, field, tvar) \
1.169 + for ((var) = SLIST_FIRST((head)); \
1.170 + (var) && ((tvar) = SLIST_NEXT((var), field), 1); \
1.171 + (var) = (tvar))
1.172 +
1.173 +#define SLIST_FOREACH_PREVPTR(var, varp, head, field) \
1.174 + for ((varp) = &SLIST_FIRST((head)); \
1.175 + ((var) = *(varp)) != NULL; \
1.176 + (varp) = &SLIST_NEXT((var), field))
1.177 +
1.178 +#define SLIST_INIT(head) do { \
1.179 + SLIST_FIRST((head)) = NULL; \
1.180 +} while (0)
1.181 +
1.182 +#define SLIST_INSERT_AFTER(slistelm, elm, field) do { \
1.183 + SLIST_NEXT((elm), field) = SLIST_NEXT((slistelm), field); \
1.184 + SLIST_NEXT((slistelm), field) = (elm); \
1.185 +} while (0)
1.186 +
1.187 +#define SLIST_INSERT_HEAD(head, elm, field) do { \
1.188 + SLIST_NEXT((elm), field) = SLIST_FIRST((head)); \
1.189 + SLIST_FIRST((head)) = (elm); \
1.190 +} while (0)
1.191 +
1.192 +#define SLIST_NEXT(elm, field) ((elm)->field.sle_next)
1.193 +
1.194 +#define SLIST_REMOVE(head, elm, type, field) do { \
1.195 + if (SLIST_FIRST((head)) == (elm)) { \
1.196 + SLIST_REMOVE_HEAD((head), field); \
1.197 + } \
1.198 + else { \
1.199 + struct type *curelm = SLIST_FIRST((head)); \
1.200 + while (SLIST_NEXT(curelm, field) != (elm)) \
1.201 + curelm = SLIST_NEXT(curelm, field); \
1.202 + SLIST_NEXT(curelm, field) = \
1.203 + SLIST_NEXT(SLIST_NEXT(curelm, field), field); \
1.204 + } \
1.205 +} while (0)
1.206 +
1.207 +#define SLIST_REMOVE_HEAD(head, field) do { \
1.208 + SLIST_FIRST((head)) = SLIST_NEXT(SLIST_FIRST((head)), field); \
1.209 +} while (0)
1.210 +
1.211 +/*
1.212 + * Singly-linked Tail queue declarations.
1.213 + */
1.214 +#define STAILQ_HEAD(name, type) \
1.215 +struct name { \
1.216 + struct type *stqh_first;/* first element */ \
1.217 + struct type **stqh_last;/* addr of last next element */ \
1.218 +}
1.219 +
1.220 +#define STAILQ_HEAD_INITIALIZER(head) \
1.221 + { NULL, &(head).stqh_first }
1.222 +
1.223 +#define STAILQ_ENTRY(type) \
1.224 +struct { \
1.225 + struct type *stqe_next; /* next element */ \
1.226 +}
1.227 +
1.228 +/*
1.229 + * Singly-linked Tail queue functions.
1.230 + */
1.231 +#define STAILQ_CONCAT(head1, head2) do { \
1.232 + if (!STAILQ_EMPTY((head2))) { \
1.233 + *(head1)->stqh_last = (head2)->stqh_first; \
1.234 + (head1)->stqh_last = (head2)->stqh_last; \
1.235 + STAILQ_INIT((head2)); \
1.236 + } \
1.237 +} while (0)
1.238 +
1.239 +#define STAILQ_EMPTY(head) ((head)->stqh_first == NULL)
1.240 +
1.241 +#define STAILQ_FIRST(head) ((head)->stqh_first)
1.242 +
1.243 +#define STAILQ_FOREACH(var, head, field) \
1.244 + for((var) = STAILQ_FIRST((head)); \
1.245 + (var); \
1.246 + (var) = STAILQ_NEXT((var), field))
1.247 +
1.248 +
1.249 +#define STAILQ_FOREACH_SAFE(var, head, field, tvar) \
1.250 + for ((var) = STAILQ_FIRST((head)); \
1.251 + (var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
1.252 + (var) = (tvar))
1.253 +
1.254 +#define STAILQ_INIT(head) do { \
1.255 + STAILQ_FIRST((head)) = NULL; \
1.256 + (head)->stqh_last = &STAILQ_FIRST((head)); \
1.257 +} while (0)
1.258 +
1.259 +#define STAILQ_INSERT_AFTER(head, tqelm, elm, field) do { \
1.260 + if ((STAILQ_NEXT((elm), field) = STAILQ_NEXT((tqelm), field)) == NULL)\
1.261 + (head)->stqh_last = &STAILQ_NEXT((elm), field); \
1.262 + STAILQ_NEXT((tqelm), field) = (elm); \
1.263 +} while (0)
1.264 +
1.265 +#define STAILQ_INSERT_HEAD(head, elm, field) do { \
1.266 + if ((STAILQ_NEXT((elm), field) = STAILQ_FIRST((head))) == NULL) \
1.267 + (head)->stqh_last = &STAILQ_NEXT((elm), field); \
1.268 + STAILQ_FIRST((head)) = (elm); \
1.269 +} while (0)
1.270 +
1.271 +#define STAILQ_INSERT_TAIL(head, elm, field) do { \
1.272 + STAILQ_NEXT((elm), field) = NULL; \
1.273 + *(head)->stqh_last = (elm); \
1.274 + (head)->stqh_last = &STAILQ_NEXT((elm), field); \
1.275 +} while (0)
1.276 +
1.277 +#define STAILQ_LAST(head, type, field) \
1.278 + (STAILQ_EMPTY((head)) ? \
1.279 + NULL : \
1.280 + ((struct type *) \
1.281 + ((char *)((head)->stqh_last) - __offsetof(struct type, field))))
1.282 +
1.283 +#define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
1.284 +
1.285 +#define STAILQ_REMOVE(head, elm, type, field) do { \
1.286 + if (STAILQ_FIRST((head)) == (elm)) { \
1.287 + STAILQ_REMOVE_HEAD((head), field); \
1.288 + } \
1.289 + else { \
1.290 + struct type *curelm = STAILQ_FIRST((head)); \
1.291 + while (STAILQ_NEXT(curelm, field) != (elm)) \
1.292 + curelm = STAILQ_NEXT(curelm, field); \
1.293 + if ((STAILQ_NEXT(curelm, field) = \
1.294 + STAILQ_NEXT(STAILQ_NEXT(curelm, field), field)) == NULL)\
1.295 + (head)->stqh_last = &STAILQ_NEXT((curelm), field);\
1.296 + } \
1.297 +} while (0)
1.298 +
1.299 +#define STAILQ_REMOVE_HEAD(head, field) do { \
1.300 + if ((STAILQ_FIRST((head)) = \
1.301 + STAILQ_NEXT(STAILQ_FIRST((head)), field)) == NULL) \
1.302 + (head)->stqh_last = &STAILQ_FIRST((head)); \
1.303 +} while (0)
1.304 +
1.305 +#define STAILQ_REMOVE_HEAD_UNTIL(head, elm, field) do { \
1.306 + if ((STAILQ_FIRST((head)) = STAILQ_NEXT((elm), field)) == NULL) \
1.307 + (head)->stqh_last = &STAILQ_FIRST((head)); \
1.308 +} while (0)
1.309 +
1.310 +/*
1.311 + * List declarations.
1.312 + */
1.313 +#define LIST_HEAD(name, type) \
1.314 +struct name { \
1.315 + struct type *lh_first; /* first element */ \
1.316 +}
1.317 +
1.318 +#define LIST_HEAD_INITIALIZER(head) \
1.319 + { NULL }
1.320 +
1.321 +#define LIST_ENTRY(type) \
1.322 +struct { \
1.323 + struct type *le_next; /* next element */ \
1.324 + struct type **le_prev; /* address of previous next element */ \
1.325 +}
1.326 +
1.327 +/*
1.328 + * List functions.
1.329 + */
1.330 +
1.331 +#define LIST_EMPTY(head) ((head)->lh_first == NULL)
1.332 +
1.333 +#define LIST_FIRST(head) ((head)->lh_first)
1.334 +
1.335 +#define LIST_FOREACH(var, head, field) \
1.336 + for ((var) = LIST_FIRST((head)); \
1.337 + (var); \
1.338 + (var) = LIST_NEXT((var), field))
1.339 +
1.340 +#define LIST_FOREACH_SAFE(var, head, field, tvar) \
1.341 + for ((var) = LIST_FIRST((head)); \
1.342 + (var) && ((tvar) = LIST_NEXT((var), field), 1); \
1.343 + (var) = (tvar))
1.344 +
1.345 +#define LIST_INIT(head) do { \
1.346 + LIST_FIRST((head)) = NULL; \
1.347 +} while (0)
1.348 +
1.349 +#define LIST_INSERT_AFTER(listelm, elm, field) do { \
1.350 + if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL)\
1.351 + LIST_NEXT((listelm), field)->field.le_prev = \
1.352 + &LIST_NEXT((elm), field); \
1.353 + LIST_NEXT((listelm), field) = (elm); \
1.354 + (elm)->field.le_prev = &LIST_NEXT((listelm), field); \
1.355 +} while (0)
1.356 +
1.357 +#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
1.358 + (elm)->field.le_prev = (listelm)->field.le_prev; \
1.359 + LIST_NEXT((elm), field) = (listelm); \
1.360 + *(listelm)->field.le_prev = (elm); \
1.361 + (listelm)->field.le_prev = &LIST_NEXT((elm), field); \
1.362 +} while (0)
1.363 +
1.364 +#define LIST_INSERT_HEAD(head, elm, field) do { \
1.365 + if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \
1.366 + LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field);\
1.367 + LIST_FIRST((head)) = (elm); \
1.368 + (elm)->field.le_prev = &LIST_FIRST((head)); \
1.369 +} while (0)
1.370 +
1.371 +#define LIST_NEXT(elm, field) ((elm)->field.le_next)
1.372 +
1.373 +#define LIST_REMOVE(elm, field) do { \
1.374 + if (LIST_NEXT((elm), field) != NULL) \
1.375 + LIST_NEXT((elm), field)->field.le_prev = \
1.376 + (elm)->field.le_prev; \
1.377 + *(elm)->field.le_prev = LIST_NEXT((elm), field); \
1.378 +} while (0)
1.379 +
1.380 +/*
1.381 + * Tail queue declarations.
1.382 + */
1.383 +#define TAILQ_HEAD(name, type) \
1.384 +struct name { \
1.385 + struct type *tqh_first; /* first element */ \
1.386 + struct type **tqh_last; /* addr of last next element */ \
1.387 + TRACEBUF \
1.388 +}
1.389 +
1.390 +#define TAILQ_HEAD_INITIALIZER(head) \
1.391 + { NULL, &(head).tqh_first }
1.392 +
1.393 +#define TAILQ_ENTRY(type) \
1.394 +struct { \
1.395 + struct type *tqe_next; /* next element */ \
1.396 + struct type **tqe_prev; /* address of previous next element */ \
1.397 + TRACEBUF \
1.398 +}
1.399 +
1.400 +/*
1.401 + * Tail queue functions.
1.402 + */
1.403 +#define TAILQ_CONCAT(head1, head2, field) do { \
1.404 + if (!TAILQ_EMPTY(head2)) { \
1.405 + *(head1)->tqh_last = (head2)->tqh_first; \
1.406 + (head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
1.407 + (head1)->tqh_last = (head2)->tqh_last; \
1.408 + TAILQ_INIT((head2)); \
1.409 + QMD_TRACE_HEAD(head1); \
1.410 + QMD_TRACE_HEAD(head2); \
1.411 + } \
1.412 +} while (0)
1.413 +
1.414 +#define TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
1.415 +
1.416 +#define TAILQ_FIRST(head) ((head)->tqh_first)
1.417 +
1.418 +#define TAILQ_FOREACH(var, head, field) \
1.419 + for ((var) = TAILQ_FIRST((head)); \
1.420 + (var); \
1.421 + (var) = TAILQ_NEXT((var), field))
1.422 +
1.423 +#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
1.424 + for ((var) = TAILQ_FIRST((head)); \
1.425 + (var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
1.426 + (var) = (tvar))
1.427 +
1.428 +#define TAILQ_FOREACH_REVERSE(var, head, headname, field) \
1.429 + for ((var) = TAILQ_LAST((head), headname); \
1.430 + (var); \
1.431 + (var) = TAILQ_PREV((var), headname, field))
1.432 +
1.433 +#define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \
1.434 + for ((var) = TAILQ_LAST((head), headname); \
1.435 + (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1); \
1.436 + (var) = (tvar))
1.437 +
1.438 +#define TAILQ_INIT(head) do { \
1.439 + TAILQ_FIRST((head)) = NULL; \
1.440 + (head)->tqh_last = &TAILQ_FIRST((head)); \
1.441 + QMD_TRACE_HEAD(head); \
1.442 +} while (0)
1.443 +
1.444 +#define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
1.445 + if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), field)) != NULL)\
1.446 + TAILQ_NEXT((elm), field)->field.tqe_prev = \
1.447 + &TAILQ_NEXT((elm), field); \
1.448 + else { \
1.449 + (head)->tqh_last = &TAILQ_NEXT((elm), field); \
1.450 + QMD_TRACE_HEAD(head); \
1.451 + } \
1.452 + TAILQ_NEXT((listelm), field) = (elm); \
1.453 + (elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \
1.454 + QMD_TRACE_ELEM(&(elm)->field); \
1.455 + QMD_TRACE_ELEM(&listelm->field); \
1.456 +} while (0)
1.457 +
1.458 +#define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
1.459 + (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
1.460 + TAILQ_NEXT((elm), field) = (listelm); \
1.461 + *(listelm)->field.tqe_prev = (elm); \
1.462 + (listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field); \
1.463 + QMD_TRACE_ELEM(&(elm)->field); \
1.464 + QMD_TRACE_ELEM(&listelm->field); \
1.465 +} while (0)
1.466 +
1.467 +#define TAILQ_INSERT_HEAD(head, elm, field) do { \
1.468 + if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL) \
1.469 + TAILQ_FIRST((head))->field.tqe_prev = \
1.470 + &TAILQ_NEXT((elm), field); \
1.471 + else \
1.472 + (head)->tqh_last = &TAILQ_NEXT((elm), field); \
1.473 + TAILQ_FIRST((head)) = (elm); \
1.474 + (elm)->field.tqe_prev = &TAILQ_FIRST((head)); \
1.475 + QMD_TRACE_HEAD(head); \
1.476 + QMD_TRACE_ELEM(&(elm)->field); \
1.477 +} while (0)
1.478 +
1.479 +#define TAILQ_INSERT_TAIL(head, elm, field) do { \
1.480 + TAILQ_NEXT((elm), field) = NULL; \
1.481 + (elm)->field.tqe_prev = (head)->tqh_last; \
1.482 + *(head)->tqh_last = (elm); \
1.483 + (head)->tqh_last = &TAILQ_NEXT((elm), field); \
1.484 + QMD_TRACE_HEAD(head); \
1.485 + QMD_TRACE_ELEM(&(elm)->field); \
1.486 +} while (0)
1.487 +
1.488 +#define TAILQ_LAST(head, headname) \
1.489 + (*(((struct headname *)((head)->tqh_last))->tqh_last))
1.490 +
1.491 +#define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
1.492 +
1.493 +#define TAILQ_PREV(elm, headname, field) \
1.494 + (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
1.495 +
1.496 +#define TAILQ_REMOVE(head, elm, field) do { \
1.497 + if ((TAILQ_NEXT((elm), field)) != NULL) \
1.498 + TAILQ_NEXT((elm), field)->field.tqe_prev = \
1.499 + (elm)->field.tqe_prev; \
1.500 + else { \
1.501 + (head)->tqh_last = (elm)->field.tqe_prev; \
1.502 + QMD_TRACE_HEAD(head); \
1.503 + } \
1.504 + *(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \
1.505 + TRASHIT((elm)->field.tqe_next); \
1.506 + TRASHIT((elm)->field.tqe_prev); \
1.507 + QMD_TRACE_ELEM(&(elm)->field); \
1.508 +} while (0)
1.509 +
1.510 +
1.511 +#ifdef _KERNEL
1.512 +
1.513 +/*
1.514 + * XXX insque() and remque() are an old way of handling certain queues.
1.515 + * They bogusly assumes that all queue heads look alike.
1.516 + */
1.517 +
1.518 +struct quehead {
1.519 + struct quehead *qh_link;
1.520 + struct quehead *qh_rlink;
1.521 +};
1.522 +
1.523 +#ifdef __CC_SUPPORTS___INLINE
1.524 +
1.525 +static __inline void
1.526 +insque(void *a, void *b)
1.527 +{
1.528 + struct quehead *element = (struct quehead *)a,
1.529 + *head = (struct quehead *)b;
1.530 +
1.531 + element->qh_link = head->qh_link;
1.532 + element->qh_rlink = head;
1.533 + head->qh_link = element;
1.534 + element->qh_link->qh_rlink = element;
1.535 +}
1.536 +
1.537 +static __inline void
1.538 +remque(void *a)
1.539 +{
1.540 + struct quehead *element = (struct quehead *)a;
1.541 +
1.542 + element->qh_link->qh_rlink = element->qh_rlink;
1.543 + element->qh_rlink->qh_link = element->qh_link;
1.544 + element->qh_rlink = 0;
1.545 +}
1.546 +
1.547 +#endif /* __CC_SUPPORTS___INLINE */
1.548 +
1.549 +#endif /* _KERNEL */
1.550 +
1.551 +#endif /* !_SYS_QUEUE_H_ */