1*5113495bSYour Name /*
2*5113495bSYour Name * Copyright (c) 1991, 1993
3*5113495bSYour Name * The Regents of the University of California. All rights reserved.
4*5113495bSYour Name *
5*5113495bSYour Name * Redistribution and use in source and binary forms, with or without
6*5113495bSYour Name * modification, are permitted provided that the following conditions
7*5113495bSYour Name * are met:
8*5113495bSYour Name * 1. Redistributions of source code must retain the above copyright
9*5113495bSYour Name * notice, this list of conditions and the following disclaimer.
10*5113495bSYour Name * 2. Redistributions in binary form must reproduce the above copyright
11*5113495bSYour Name * notice, this list of conditions and the following disclaimer in the
12*5113495bSYour Name * documentation and/or other materials provided with the distribution.
13*5113495bSYour Name * 4. Neither the name of the University nor the names of its contributors
14*5113495bSYour Name * may be used to endorse or promote products derived from this software
15*5113495bSYour Name * without specific prior written permission.
16*5113495bSYour Name *
17*5113495bSYour Name * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18*5113495bSYour Name * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19*5113495bSYour Name * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20*5113495bSYour Name * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21*5113495bSYour Name * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22*5113495bSYour Name * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23*5113495bSYour Name * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24*5113495bSYour Name * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25*5113495bSYour Name * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26*5113495bSYour Name * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27*5113495bSYour Name * SUCH DAMAGE.
28*5113495bSYour Name *
29*5113495bSYour Name * @(#)queue.h 8.5 (Berkeley) 8/20/94
30*5113495bSYour Name * $FreeBSD: src/sys/sys/queue.h,v 1.58 2004/04/07 04:19:49 imp Exp $
31*5113495bSYour Name */
32*5113495bSYour Name
33*5113495bSYour Name #ifndef _QUEUE_H_
34*5113495bSYour Name #define _QUEUE_H_
35*5113495bSYour Name
36*5113495bSYour Name /*
37*5113495bSYour Name * This file defines four types of data structures: singly-linked lists,
38*5113495bSYour Name * singly-linked tail queues, lists and tail queues.
39*5113495bSYour Name *
40*5113495bSYour Name * A singly-linked list is headed by a single forward pointer. The elements
41*5113495bSYour Name * are singly linked for minimum space and pointer manipulation overhead at
42*5113495bSYour Name * the expense of O(n) removal for arbitrary elements. New elements can be
43*5113495bSYour Name * added to the list after an existing element or at the head of the list.
44*5113495bSYour Name * Elements being removed from the head of the list should use the explicit
45*5113495bSYour Name * macro for this purpose for optimum efficiency. A singly-linked list may
46*5113495bSYour Name * only be traversed in the forward direction. Singly-linked lists are ideal
47*5113495bSYour Name * for applications with large datasets and few or no removals or for
48*5113495bSYour Name * implementing a LIFO queue.
49*5113495bSYour Name *
50*5113495bSYour Name * A singly-linked tail queue is headed by a pair of pointers, one to the
51*5113495bSYour Name * head of the list and the other to the tail of the list. The elements are
52*5113495bSYour Name * singly linked for minimum space and pointer manipulation overhead at the
53*5113495bSYour Name * expense of O(n) removal for arbitrary elements. New elements can be added
54*5113495bSYour Name * to the list after an existing element, at the head of the list, or at the
55*5113495bSYour Name * end of the list. Elements being removed from the head of the tail queue
56*5113495bSYour Name * should use the explicit macro for this purpose for optimum efficiency.
57*5113495bSYour Name * A singly-linked tail queue may only be traversed in the forward direction.
58*5113495bSYour Name * Singly-linked tail queues are ideal for applications with large datasets
59*5113495bSYour Name * and few or no removals or for implementing a FIFO queue.
60*5113495bSYour Name *
61*5113495bSYour Name * A list is headed by a single forward pointer (or an array of forward
62*5113495bSYour Name * pointers for a hash table header). The elements are doubly linked
63*5113495bSYour Name * so that an arbitrary element can be removed without a need to
64*5113495bSYour Name * traverse the list. New elements can be added to the list before
65*5113495bSYour Name * or after an existing element or at the head of the list. A list
66*5113495bSYour Name * may only be traversed in the forward direction.
67*5113495bSYour Name *
68*5113495bSYour Name * A tail queue is headed by a pair of pointers, one to the head of the
69*5113495bSYour Name * list and the other to the tail of the list. The elements are doubly
70*5113495bSYour Name * linked so that an arbitrary element can be removed without a need to
71*5113495bSYour Name * traverse the list. New elements can be added to the list before or
72*5113495bSYour Name * after an existing element, at the head of the list, or at the end of
73*5113495bSYour Name * the list. A tail queue may be traversed in either direction.
74*5113495bSYour Name *
75*5113495bSYour Name * For details on the use of these macros, see the queue(3) manual page.
76*5113495bSYour Name *
77*5113495bSYour Name *
78*5113495bSYour Name * SLIST LIST STAILQ TAILQ
79*5113495bSYour Name * _HEAD + + + +
80*5113495bSYour Name * _HEAD_INITIALIZER + + + +
81*5113495bSYour Name * _ENTRY + + + +
82*5113495bSYour Name * _INIT + + + +
83*5113495bSYour Name * _EMPTY + + + +
84*5113495bSYour Name * _FIRST + + + +
85*5113495bSYour Name * _NEXT + + + +
86*5113495bSYour Name * _PREV - - - +
87*5113495bSYour Name * _LAST - - + +
88*5113495bSYour Name * _FOREACH + + + +
89*5113495bSYour Name * _FOREACH_SAFE + + + +
90*5113495bSYour Name * _FOREACH_REVERSE - - - +
91*5113495bSYour Name * _FOREACH_REVERSE_SAFE - - - +
92*5113495bSYour Name * _INSERT_HEAD + + + +
93*5113495bSYour Name * _INSERT_BEFORE - + - +
94*5113495bSYour Name * _INSERT_AFTER + + + +
95*5113495bSYour Name * _INSERT_TAIL - - + +
96*5113495bSYour Name * _CONCAT - - + +
97*5113495bSYour Name * _REMOVE_HEAD + - + -
98*5113495bSYour Name * _REMOVE + + + +
99*5113495bSYour Name *
100*5113495bSYour Name */
101*5113495bSYour Name #define QUEUE_MACRO_DEBUG 0
102*5113495bSYour Name #if QUEUE_MACRO_DEBUG
103*5113495bSYour Name /*
104*5113495bSYour Name * Store the last 2 places the queue element or head was altered
105*5113495bSYour Name */
106*5113495bSYour Name struct qm_trace {
107*5113495bSYour Name char *lastfile;
108*5113495bSYour Name int lastline;
109*5113495bSYour Name char *prevfile;
110*5113495bSYour Name int prevline;
111*5113495bSYour Name };
112*5113495bSYour Name
113*5113495bSYour Name #define TRACEBUF struct qm_trace trace;
114*5113495bSYour Name #define TRASHIT(x) do {(x) = (void *)NULL; } while (0)
115*5113495bSYour Name
116*5113495bSYour Name #define QMD_TRACE_HEAD(head) do { \
117*5113495bSYour Name (head)->trace.prevline = (head)->trace.lastline; \
118*5113495bSYour Name (head)->trace.prevfile = (head)->trace.lastfile; \
119*5113495bSYour Name (head)->trace.lastline = __LINE__; \
120*5113495bSYour Name (head)->trace.lastfile = __FILE__; \
121*5113495bSYour Name } while (0)
122*5113495bSYour Name
123*5113495bSYour Name #define QMD_TRACE_ELEM(elem) do { \
124*5113495bSYour Name (elem)->trace.prevline = (elem)->trace.lastline; \
125*5113495bSYour Name (elem)->trace.prevfile = (elem)->trace.lastfile; \
126*5113495bSYour Name (elem)->trace.lastline = __LINE__; \
127*5113495bSYour Name (elem)->trace.lastfile = __FILE__; \
128*5113495bSYour Name } while (0)
129*5113495bSYour Name
130*5113495bSYour Name #else
131*5113495bSYour Name #define QMD_TRACE_ELEM(elem)
132*5113495bSYour Name #define QMD_TRACE_HEAD(head)
133*5113495bSYour Name #define TRACEBUF
134*5113495bSYour Name #define TRASHIT(x) do {(x) = (void *)0; } while (0)
135*5113495bSYour Name #endif /* QUEUE_MACRO_DEBUG */
136*5113495bSYour Name
137*5113495bSYour Name #ifdef ATHR_RNWF
138*5113495bSYour Name /*
139*5113495bSYour Name * NDIS contains a defn for SLIST_ENTRY and SINGLE_LIST_ENTRY
140*5113495bSYour Name */
141*5113495bSYour Name #endif
142*5113495bSYour Name
143*5113495bSYour Name /*
144*5113495bSYour Name * Singly-linked List declarations.
145*5113495bSYour Name */
146*5113495bSYour Name #define SLIST_HEAD(name, type) \
147*5113495bSYour Name struct name { \
148*5113495bSYour Name struct type *slh_first; /* first element */ \
149*5113495bSYour Name }
150*5113495bSYour Name
151*5113495bSYour Name #define SLIST_HEAD_INITIALIZER(head) \
152*5113495bSYour Name { NULL }
153*5113495bSYour Name
154*5113495bSYour Name #define SING_LIST_ENTRY(type) \
155*5113495bSYour Name struct { \
156*5113495bSYour Name struct type *sle_next; /* next element */ \
157*5113495bSYour Name }
158*5113495bSYour Name
159*5113495bSYour Name /*
160*5113495bSYour Name * Singly-linked List functions.
161*5113495bSYour Name */
162*5113495bSYour Name #define SLIST_EMPTY(head) ((head)->slh_first == NULL)
163*5113495bSYour Name
164*5113495bSYour Name #define SLIST_FIRST(head) ((head)->slh_first)
165*5113495bSYour Name
166*5113495bSYour Name #define SLIST_FOREACH(var, head, field) \
167*5113495bSYour Name for ((var) = SLIST_FIRST((head)); \
168*5113495bSYour Name (var); \
169*5113495bSYour Name (var) = SLIST_NEXT((var), field))
170*5113495bSYour Name
171*5113495bSYour Name #define SLIST_FOREACH_SAFE(var, head, field, tvar) \
172*5113495bSYour Name for ((var) = SLIST_FIRST((head)); \
173*5113495bSYour Name (var) && ((tvar) = SLIST_NEXT((var), field), 1); \
174*5113495bSYour Name (var) = (tvar))
175*5113495bSYour Name
176*5113495bSYour Name #define SLIST_FOREACH_PREVPTR(var, varp, head, field) \
177*5113495bSYour Name for ((varp) = &SLIST_FIRST((head)); \
178*5113495bSYour Name ((var) = *(varp)) != NULL; \
179*5113495bSYour Name (varp) = &SLIST_NEXT((var), field))
180*5113495bSYour Name
181*5113495bSYour Name #define SLIST_INIT(head) do { \
182*5113495bSYour Name SLIST_FIRST((head)) = NULL; \
183*5113495bSYour Name } while (0)
184*5113495bSYour Name
185*5113495bSYour Name #define SLIST_INSERT_AFTER(slistelm, elm, field) do { \
186*5113495bSYour Name SLIST_NEXT((elm), field) = SLIST_NEXT((slistelm), field); \
187*5113495bSYour Name SLIST_NEXT((slistelm), field) = (elm); \
188*5113495bSYour Name } while (0)
189*5113495bSYour Name
190*5113495bSYour Name #define SLIST_INSERT_HEAD(head, elm, field) do { \
191*5113495bSYour Name SLIST_NEXT((elm), field) = SLIST_FIRST((head)); \
192*5113495bSYour Name SLIST_FIRST((head)) = (elm); \
193*5113495bSYour Name } while (0)
194*5113495bSYour Name
195*5113495bSYour Name #define SLIST_NEXT(elm, field) ((elm)->field.sle_next)
196*5113495bSYour Name
197*5113495bSYour Name #define SLIST_REMOVE(head, elm, type, field) do { \
198*5113495bSYour Name if (SLIST_FIRST((head)) == (elm)) { \
199*5113495bSYour Name SLIST_REMOVE_HEAD((head), field); \
200*5113495bSYour Name } \
201*5113495bSYour Name else { \
202*5113495bSYour Name struct type *curelm = SLIST_FIRST((head)); \
203*5113495bSYour Name while (SLIST_NEXT(curelm, field) != (elm)) \
204*5113495bSYour Name curelm = SLIST_NEXT(curelm, field); \
205*5113495bSYour Name SLIST_NEXT(curelm, field) = \
206*5113495bSYour Name SLIST_NEXT(SLIST_NEXT(curelm, field), field);\
207*5113495bSYour Name } \
208*5113495bSYour Name } while (0)
209*5113495bSYour Name
210*5113495bSYour Name #define SLIST_REMOVE_HEAD(head, field) do { \
211*5113495bSYour Name SLIST_FIRST((head)) = SLIST_NEXT(SLIST_FIRST((head)), \
212*5113495bSYour Name field); \
213*5113495bSYour Name } while (0)
214*5113495bSYour Name
215*5113495bSYour Name /*
216*5113495bSYour Name * Singly-linked Tail queue declarations.
217*5113495bSYour Name */
218*5113495bSYour Name #define STAILQ_HEAD(name, type) \
219*5113495bSYour Name struct name { \
220*5113495bSYour Name struct type *stqh_first; \
221*5113495bSYour Name struct type **stqh_last; \
222*5113495bSYour Name }
223*5113495bSYour Name
224*5113495bSYour Name #define STAILQ_HEAD_INITIALIZER(head) \
225*5113495bSYour Name { NULL, &(head).stqh_first }
226*5113495bSYour Name
227*5113495bSYour Name #define STAILQ_ENTRY(type) \
228*5113495bSYour Name struct { \
229*5113495bSYour Name struct type *stqe_next; /* next element */ \
230*5113495bSYour Name }
231*5113495bSYour Name
232*5113495bSYour Name /*
233*5113495bSYour Name * Singly-linked Tail queue functions.
234*5113495bSYour Name */
235*5113495bSYour Name #define STAILQ_CONCAT(head1, head2) do { \
236*5113495bSYour Name if (!STAILQ_EMPTY((head2))) { \
237*5113495bSYour Name *(head1)->stqh_last = (head2)->stqh_first; \
238*5113495bSYour Name (head1)->stqh_last = (head2)->stqh_last; \
239*5113495bSYour Name STAILQ_INIT((head2)); \
240*5113495bSYour Name } \
241*5113495bSYour Name } while (0)
242*5113495bSYour Name
243*5113495bSYour Name #define STAILQ_EMPTY(head) ((head)->stqh_first == NULL)
244*5113495bSYour Name
245*5113495bSYour Name #define STAILQ_FIRST(head) ((head)->stqh_first)
246*5113495bSYour Name
247*5113495bSYour Name #define STAILQ_FOREACH(var, head, field) \
248*5113495bSYour Name for ((var) = STAILQ_FIRST((head)); \
249*5113495bSYour Name (var); \
250*5113495bSYour Name (var) = STAILQ_NEXT((var), field))
251*5113495bSYour Name
252*5113495bSYour Name #define STAILQ_FOREACH_SAFE(var, head, field, tvar) \
253*5113495bSYour Name for ((var) = STAILQ_FIRST((head)); \
254*5113495bSYour Name (var) && ((tvar) = STAILQ_NEXT((var), field), 1); \
255*5113495bSYour Name (var) = (tvar))
256*5113495bSYour Name
257*5113495bSYour Name #define STAILQ_INIT(head) do { \
258*5113495bSYour Name STAILQ_FIRST((head)) = NULL; \
259*5113495bSYour Name (head)->stqh_last = &STAILQ_FIRST((head)); \
260*5113495bSYour Name } while (0)
261*5113495bSYour Name
262*5113495bSYour Name #define STAILQ_INSERT_AFTER(head, tqelm, elm, field) do { \
263*5113495bSYour Name if ((STAILQ_NEXT((elm), field) = STAILQ_NEXT((tqelm), \
264*5113495bSYour Name field)) == NULL) \
265*5113495bSYour Name (head)->stqh_last = &STAILQ_NEXT((elm), field); \
266*5113495bSYour Name STAILQ_NEXT((tqelm), field) = (elm); \
267*5113495bSYour Name } while (0)
268*5113495bSYour Name
269*5113495bSYour Name #define STAILQ_INSERT_HEAD(head, elm, field) do { \
270*5113495bSYour Name if ((STAILQ_NEXT((elm), field) = STAILQ_FIRST((head))) == \
271*5113495bSYour Name NULL) \
272*5113495bSYour Name (head)->stqh_last = &STAILQ_NEXT((elm), field); \
273*5113495bSYour Name STAILQ_FIRST((head)) = (elm); \
274*5113495bSYour Name } while (0)
275*5113495bSYour Name
276*5113495bSYour Name #define STAILQ_INSERT_TAIL(head, elm, field) do { \
277*5113495bSYour Name STAILQ_NEXT((elm), field) = NULL; \
278*5113495bSYour Name *(head)->stqh_last = (elm); \
279*5113495bSYour Name (head)->stqh_last = &STAILQ_NEXT((elm), field); \
280*5113495bSYour Name } while (0)
281*5113495bSYour Name
282*5113495bSYour Name #define STAILQ_LAST(head, type, field) \
283*5113495bSYour Name (STAILQ_EMPTY((head)) ? \
284*5113495bSYour Name NULL : \
285*5113495bSYour Name ((struct type *) \
286*5113495bSYour Name ((char *)((head)->stqh_last) - __offsetof(struct type, field))))
287*5113495bSYour Name
288*5113495bSYour Name #define STAILQ_NEXT(elm, field) ((elm)->field.stqe_next)
289*5113495bSYour Name
290*5113495bSYour Name #define STAILQ_REMOVE(head, elm, type, field) do { \
291*5113495bSYour Name if (STAILQ_FIRST((head)) == (elm)) { \
292*5113495bSYour Name STAILQ_REMOVE_HEAD((head), field); \
293*5113495bSYour Name } \
294*5113495bSYour Name else { \
295*5113495bSYour Name struct type *curelm = STAILQ_FIRST((head)); \
296*5113495bSYour Name while (STAILQ_NEXT(curelm, field) != (elm)) \
297*5113495bSYour Name curelm = STAILQ_NEXT(curelm, field); \
298*5113495bSYour Name if ((STAILQ_NEXT(curelm, field) = \
299*5113495bSYour Name STAILQ_NEXT(STAILQ_NEXT(curelm, field), \
300*5113495bSYour Name field)) == NULL) \
301*5113495bSYour Name (head)->stqh_last = &STAILQ_NEXT((curelm),\
302*5113495bSYour Name field); \
303*5113495bSYour Name } \
304*5113495bSYour Name } while (0)
305*5113495bSYour Name
306*5113495bSYour Name #define STAILQ_REMOVE_AFTER(head, elm, field) do { \
307*5113495bSYour Name if (STAILQ_NEXT(elm, field)) { \
308*5113495bSYour Name if ((STAILQ_NEXT(elm, field) = \
309*5113495bSYour Name STAILQ_NEXT(STAILQ_NEXT(elm, field), \
310*5113495bSYour Name field)) == NULL) \
311*5113495bSYour Name (head)->stqh_last = \
312*5113495bSYour Name &STAILQ_NEXT((elm), field); \
313*5113495bSYour Name } \
314*5113495bSYour Name } while (0)
315*5113495bSYour Name
316*5113495bSYour Name #define STAILQ_REMOVE_HEAD(head, field) do { \
317*5113495bSYour Name if ((STAILQ_FIRST((head)) = \
318*5113495bSYour Name STAILQ_NEXT(STAILQ_FIRST((head)), field)) == \
319*5113495bSYour Name NULL)\
320*5113495bSYour Name (head)->stqh_last = &STAILQ_FIRST((head)); \
321*5113495bSYour Name } while (0)
322*5113495bSYour Name
323*5113495bSYour Name #define STAILQ_REMOVE_HEAD_UNTIL(head, elm, field) do { \
324*5113495bSYour Name if ((STAILQ_FIRST((head)) = \
325*5113495bSYour Name STAILQ_NEXT((elm), field)) == NULL) \
326*5113495bSYour Name (head)->stqh_last = &STAILQ_FIRST((head)); \
327*5113495bSYour Name } while (0)
328*5113495bSYour Name
329*5113495bSYour Name /*
330*5113495bSYour Name * List declarations.
331*5113495bSYour Name */
332*5113495bSYour Name #define ATH_LIST_HEAD(name, type) \
333*5113495bSYour Name struct name { \
334*5113495bSYour Name struct type *lh_first; \
335*5113495bSYour Name }
336*5113495bSYour Name
337*5113495bSYour Name #ifndef LIST_HEAD
338*5113495bSYour Name #define LIST_HEAD ATH_LIST_HEAD
339*5113495bSYour Name #endif
340*5113495bSYour Name
341*5113495bSYour Name #define LIST_HEAD_INITIALIZER(head) \
342*5113495bSYour Name { NULL }
343*5113495bSYour Name
344*5113495bSYour Name #define LIST_ENTRY(type) \
345*5113495bSYour Name struct { \
346*5113495bSYour Name struct type *le_next; \
347*5113495bSYour Name struct type **le_prev; \
348*5113495bSYour Name }
349*5113495bSYour Name
350*5113495bSYour Name /*
351*5113495bSYour Name * List functions.
352*5113495bSYour Name */
353*5113495bSYour Name
354*5113495bSYour Name #define LIST_EMPTY(head) ((head)->lh_first == NULL)
355*5113495bSYour Name
356*5113495bSYour Name #define LIST_FIRST(head) ((head)->lh_first)
357*5113495bSYour Name
358*5113495bSYour Name #define LIST_FOREACH(var, head, field) \
359*5113495bSYour Name for ((var) = LIST_FIRST((head)); \
360*5113495bSYour Name (var); \
361*5113495bSYour Name (var) = LIST_NEXT((var), field))
362*5113495bSYour Name
363*5113495bSYour Name #define LIST_FOREACH_SAFE(var, head, field, tvar) \
364*5113495bSYour Name for ((var) = LIST_FIRST((head)); \
365*5113495bSYour Name (var) && ((tvar) = LIST_NEXT((var), field), 1); \
366*5113495bSYour Name (var) = (tvar))
367*5113495bSYour Name
368*5113495bSYour Name #define LIST_INIT(head) do { \
369*5113495bSYour Name LIST_FIRST((head)) = NULL; \
370*5113495bSYour Name } while (0)
371*5113495bSYour Name
372*5113495bSYour Name #define LIST_INSERT_AFTER(listelm, elm, field) do { \
373*5113495bSYour Name if ((LIST_NEXT((elm), field) = \
374*5113495bSYour Name LIST_NEXT((listelm), field)) != NULL) \
375*5113495bSYour Name LIST_NEXT((listelm), field)->field.le_prev = \
376*5113495bSYour Name &LIST_NEXT((elm), field); \
377*5113495bSYour Name LIST_NEXT((listelm), field) = (elm); \
378*5113495bSYour Name (elm)->field.le_prev = &LIST_NEXT((listelm), field); \
379*5113495bSYour Name } while (0)
380*5113495bSYour Name
381*5113495bSYour Name #define LIST_INSERT_BEFORE(listelm, elm, field) do { \
382*5113495bSYour Name (elm)->field.le_prev = (listelm)->field.le_prev; \
383*5113495bSYour Name LIST_NEXT((elm), field) = (listelm); \
384*5113495bSYour Name *(listelm)->field.le_prev = (elm); \
385*5113495bSYour Name (listelm)->field.le_prev = &LIST_NEXT((elm), field); \
386*5113495bSYour Name } while (0)
387*5113495bSYour Name
388*5113495bSYour Name #define LIST_INSERT_HEAD(head, elm, field) do { \
389*5113495bSYour Name if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \
390*5113495bSYour Name LIST_FIRST((head))->field.le_prev = \
391*5113495bSYour Name &LIST_NEXT((elm), field); \
392*5113495bSYour Name LIST_FIRST((head)) = (elm); \
393*5113495bSYour Name (elm)->field.le_prev = &LIST_FIRST((head)); \
394*5113495bSYour Name } while (0)
395*5113495bSYour Name
396*5113495bSYour Name #define LIST_NEXT(elm, field) ((elm)->field.le_next)
397*5113495bSYour Name
398*5113495bSYour Name #define LIST_REMOVE(elm, field) do { \
399*5113495bSYour Name if (LIST_NEXT((elm), field) != NULL) \
400*5113495bSYour Name LIST_NEXT((elm), field)->field.le_prev = \
401*5113495bSYour Name (elm)->field.le_prev; \
402*5113495bSYour Name *(elm)->field.le_prev = LIST_NEXT((elm), field); \
403*5113495bSYour Name } while (0)
404*5113495bSYour Name
405*5113495bSYour Name /*
406*5113495bSYour Name * Tail queue declarations.
407*5113495bSYour Name */
408*5113495bSYour Name #ifndef TRACE_TX_LEAK
409*5113495bSYour Name #define TRACE_TX_LEAK 0
410*5113495bSYour Name #endif
411*5113495bSYour Name
412*5113495bSYour Name #if TRACE_TX_LEAK
413*5113495bSYour Name #define HEADNAME char headname[64];
414*5113495bSYour Name #define COPY_HEADNAME(head) OS_MEMCPY((head)->headname, #head, sizeof(#head))
415*5113495bSYour Name #else
416*5113495bSYour Name #define HEADNAME
417*5113495bSYour Name #define COPY_HEADNAME(head)
418*5113495bSYour Name #endif
419*5113495bSYour Name
420*5113495bSYour Name #define TAILQ_HEAD(name, type) \
421*5113495bSYour Name struct name { \
422*5113495bSYour Name struct type *tqh_first; \
423*5113495bSYour Name struct type **tqh_last; \
424*5113495bSYour Name HEADNAME \
425*5113495bSYour Name TRACEBUF \
426*5113495bSYour Name }
427*5113495bSYour Name
428*5113495bSYour Name #define TAILQ_HEAD_INITIALIZER(head) \
429*5113495bSYour Name { NULL, &(head).tqh_first }
430*5113495bSYour Name
431*5113495bSYour Name #define TAILQ_ENTRY(type) \
432*5113495bSYour Name struct { \
433*5113495bSYour Name struct type *tqe_next; \
434*5113495bSYour Name struct type **tqe_prev; \
435*5113495bSYour Name TRACEBUF \
436*5113495bSYour Name }
437*5113495bSYour Name
438*5113495bSYour Name /*
439*5113495bSYour Name * Tail queue functions.
440*5113495bSYour Name */
441*5113495bSYour Name
442*5113495bSYour Name #define TAILQ_EMPTY(head) ((head)->tqh_first == NULL)
443*5113495bSYour Name
444*5113495bSYour Name #define TAILQ_FIRST(head) ((head)->tqh_first)
445*5113495bSYour Name
446*5113495bSYour Name #define TAILQ_FOREACH(var, head, field) \
447*5113495bSYour Name for ((var) = TAILQ_FIRST((head)); \
448*5113495bSYour Name (var); \
449*5113495bSYour Name (var) = TAILQ_NEXT((var), field))
450*5113495bSYour Name
451*5113495bSYour Name #define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
452*5113495bSYour Name for ((var) = TAILQ_FIRST((head)); \
453*5113495bSYour Name (var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
454*5113495bSYour Name (var) = (tvar))
455*5113495bSYour Name
456*5113495bSYour Name #define TAILQ_FOREACH_REVERSE(var, head, headname, field) \
457*5113495bSYour Name for ((var) = TAILQ_LAST((head), headname); \
458*5113495bSYour Name (var); \
459*5113495bSYour Name (var) = TAILQ_PREV((var), headname, field))
460*5113495bSYour Name
461*5113495bSYour Name #define TAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, tvar) \
462*5113495bSYour Name for ((var) = TAILQ_LAST((head), headname); \
463*5113495bSYour Name (var) && ((tvar) = TAILQ_PREV((var), headname, field), 1); \
464*5113495bSYour Name (var) = (tvar))
465*5113495bSYour Name
466*5113495bSYour Name #define TAILQ_INIT(head) do { \
467*5113495bSYour Name TAILQ_FIRST((head)) = NULL; \
468*5113495bSYour Name (head)->tqh_last = &TAILQ_FIRST((head)); \
469*5113495bSYour Name COPY_HEADNAME(head); \
470*5113495bSYour Name QMD_TRACE_HEAD(head); \
471*5113495bSYour Name } while (0)
472*5113495bSYour Name
473*5113495bSYour Name #define TAILQ_INSERT_AFTER(head, listelm, elm, field) do { \
474*5113495bSYour Name if ((TAILQ_NEXT((elm), field) = TAILQ_NEXT((listelm), \
475*5113495bSYour Name field)) != NULL) \
476*5113495bSYour Name TAILQ_NEXT((elm), field)->field.tqe_prev = \
477*5113495bSYour Name &TAILQ_NEXT((elm), field); \
478*5113495bSYour Name else { \
479*5113495bSYour Name (head)->tqh_last = &TAILQ_NEXT((elm), field); \
480*5113495bSYour Name QMD_TRACE_HEAD(head); \
481*5113495bSYour Name } \
482*5113495bSYour Name TAILQ_NEXT((listelm), field) = (elm); \
483*5113495bSYour Name (elm)->field.tqe_prev = &TAILQ_NEXT((listelm), field); \
484*5113495bSYour Name QMD_TRACE_ELEM(&(elm)->field); \
485*5113495bSYour Name QMD_TRACE_ELEM(&listelm->field); \
486*5113495bSYour Name } while (0)
487*5113495bSYour Name
488*5113495bSYour Name #define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
489*5113495bSYour Name (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
490*5113495bSYour Name TAILQ_NEXT((elm), field) = (listelm); \
491*5113495bSYour Name *(listelm)->field.tqe_prev = (elm); \
492*5113495bSYour Name (listelm)->field.tqe_prev = &TAILQ_NEXT((elm), field); \
493*5113495bSYour Name QMD_TRACE_ELEM(&(elm)->field); \
494*5113495bSYour Name QMD_TRACE_ELEM(&listelm->field); \
495*5113495bSYour Name } while (0)
496*5113495bSYour Name
497*5113495bSYour Name #define TAILQ_INSERT_HEAD(head, elm, field) do { \
498*5113495bSYour Name if ((TAILQ_NEXT((elm), field) = TAILQ_FIRST((head))) != NULL)\
499*5113495bSYour Name TAILQ_FIRST((head))->field.tqe_prev = \
500*5113495bSYour Name &TAILQ_NEXT((elm), field); \
501*5113495bSYour Name else \
502*5113495bSYour Name (head)->tqh_last = &TAILQ_NEXT((elm), field); \
503*5113495bSYour Name TAILQ_FIRST((head)) = (elm); \
504*5113495bSYour Name (elm)->field.tqe_prev = &TAILQ_FIRST((head)); \
505*5113495bSYour Name QMD_TRACE_HEAD(head); \
506*5113495bSYour Name QMD_TRACE_ELEM(&(elm)->field); \
507*5113495bSYour Name } while (0)
508*5113495bSYour Name
509*5113495bSYour Name #define TAILQ_INSERT_TAIL(head, elm, field) do { \
510*5113495bSYour Name TAILQ_NEXT((elm), field) = NULL; \
511*5113495bSYour Name (elm)->field.tqe_prev = (head)->tqh_last; \
512*5113495bSYour Name *(head)->tqh_last = (elm); \
513*5113495bSYour Name (head)->tqh_last = &TAILQ_NEXT((elm), field); \
514*5113495bSYour Name QMD_TRACE_HEAD(head); \
515*5113495bSYour Name QMD_TRACE_ELEM(&(elm)->field); \
516*5113495bSYour Name } while (0)
517*5113495bSYour Name
518*5113495bSYour Name #define TAILQ_LAST(head, headname) \
519*5113495bSYour Name (*(((struct headname *)((head)->tqh_last))->tqh_last))
520*5113495bSYour Name
521*5113495bSYour Name #define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
522*5113495bSYour Name
523*5113495bSYour Name #define TAILQ_PREV(elm, headname, field) \
524*5113495bSYour Name (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
525*5113495bSYour Name
526*5113495bSYour Name #define TAILQ_REMOVE(head, elm, field) do { \
527*5113495bSYour Name if ((TAILQ_NEXT((elm), field)) != NULL) \
528*5113495bSYour Name TAILQ_NEXT((elm), field)->field.tqe_prev = \
529*5113495bSYour Name (elm)->field.tqe_prev; \
530*5113495bSYour Name else { \
531*5113495bSYour Name (head)->tqh_last = (elm)->field.tqe_prev; \
532*5113495bSYour Name QMD_TRACE_HEAD(head); \
533*5113495bSYour Name } \
534*5113495bSYour Name *(elm)->field.tqe_prev = TAILQ_NEXT((elm), field); \
535*5113495bSYour Name TRASHIT((elm)->field.tqe_next); \
536*5113495bSYour Name TRASHIT((elm)->field.tqe_prev); \
537*5113495bSYour Name QMD_TRACE_ELEM(&(elm)->field); \
538*5113495bSYour Name } while (0)
539*5113495bSYour Name
540*5113495bSYour Name #define TAILQ_CONCAT(head1, head2, field) do { \
541*5113495bSYour Name if (!TAILQ_EMPTY(head2)) { \
542*5113495bSYour Name *(head1)->tqh_last = (head2)->tqh_first; \
543*5113495bSYour Name (head2)->tqh_first->field.tqe_prev = (head1)->tqh_last;\
544*5113495bSYour Name (head1)->tqh_last = (head2)->tqh_last; \
545*5113495bSYour Name TAILQ_INIT((head2)); \
546*5113495bSYour Name } \
547*5113495bSYour Name } while (0)
548*5113495bSYour Name
549*5113495bSYour Name #ifdef _KERNEL
550*5113495bSYour Name
551*5113495bSYour Name /*
552*5113495bSYour Name * XXX insque() and remque() are an old way of handling certain queues.
553*5113495bSYour Name * They bogusly assumes that all queue heads look alike.
554*5113495bSYour Name */
555*5113495bSYour Name
556*5113495bSYour Name struct quehead {
557*5113495bSYour Name struct quehead *qh_link;
558*5113495bSYour Name struct quehead *qh_rlink;
559*5113495bSYour Name };
560*5113495bSYour Name
561*5113495bSYour Name #if defined(__GNUC__) || defined(__INTEL_COMPILER)
562*5113495bSYour Name
insque(void * a,void * b)563*5113495bSYour Name static inline void insque(void *a, void *b)
564*5113495bSYour Name {
565*5113495bSYour Name struct quehead *element = (struct quehead *)a,
566*5113495bSYour Name *head = (struct quehead *)b;
567*5113495bSYour Name
568*5113495bSYour Name element->qh_link = head->qh_link;
569*5113495bSYour Name element->qh_rlink = head;
570*5113495bSYour Name head->qh_link = element;
571*5113495bSYour Name element->qh_link->qh_rlink = element;
572*5113495bSYour Name }
573*5113495bSYour Name
remque(void * a)574*5113495bSYour Name static inline void remque(void *a)
575*5113495bSYour Name {
576*5113495bSYour Name struct quehead *element = (struct quehead *)a;
577*5113495bSYour Name
578*5113495bSYour Name element->qh_link->qh_rlink = element->qh_rlink;
579*5113495bSYour Name element->qh_rlink->qh_link = element->qh_link;
580*5113495bSYour Name element->qh_rlink = 0;
581*5113495bSYour Name }
582*5113495bSYour Name
583*5113495bSYour Name #else /* !(__GNUC__ || __INTEL_COMPILER) */
584*5113495bSYour Name
585*5113495bSYour Name void insque(void *a, void *b);
586*5113495bSYour Name void remque(void *a);
587*5113495bSYour Name
588*5113495bSYour Name #endif /* __GNUC__ || __INTEL_COMPILER */
589*5113495bSYour Name
590*5113495bSYour Name #endif /* _KERNEL */
591*5113495bSYour Name
592*5113495bSYour Name #endif /* _QUEUE_H_ */
593