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1 | c616bbe1 | Pierre Riteau | /* $NetBSD: queue.h,v 1.52 2009/04/20 09:56:08 mschuett Exp $ */
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2 | fc56ef08 | blueswir1 | |
3 | fc56ef08 | blueswir1 | /*
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4 | fc56ef08 | blueswir1 | * Qemu version: Copy from netbsd, removed debug code, removed some of
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5 | c616bbe1 | Pierre Riteau | * the implementations. Left in lists, simple queues, tail queues and
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6 | c616bbe1 | Pierre Riteau | * circular queues.
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7 | fc56ef08 | blueswir1 | */
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8 | fc56ef08 | blueswir1 | |
9 | fc56ef08 | blueswir1 | /*
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10 | fc56ef08 | blueswir1 | * Copyright (c) 1991, 1993
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11 | fc56ef08 | blueswir1 | * The Regents of the University of California. All rights reserved.
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12 | fc56ef08 | blueswir1 | *
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13 | fc56ef08 | blueswir1 | * Redistribution and use in source and binary forms, with or without
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14 | fc56ef08 | blueswir1 | * modification, are permitted provided that the following conditions
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15 | fc56ef08 | blueswir1 | * are met:
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16 | fc56ef08 | blueswir1 | * 1. Redistributions of source code must retain the above copyright
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17 | fc56ef08 | blueswir1 | * notice, this list of conditions and the following disclaimer.
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18 | fc56ef08 | blueswir1 | * 2. Redistributions in binary form must reproduce the above copyright
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19 | fc56ef08 | blueswir1 | * notice, this list of conditions and the following disclaimer in the
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20 | fc56ef08 | blueswir1 | * documentation and/or other materials provided with the distribution.
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21 | fc56ef08 | blueswir1 | * 3. Neither the name of the University nor the names of its contributors
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22 | fc56ef08 | blueswir1 | * may be used to endorse or promote products derived from this software
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23 | fc56ef08 | blueswir1 | * without specific prior written permission.
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24 | fc56ef08 | blueswir1 | *
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25 | fc56ef08 | blueswir1 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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26 | fc56ef08 | blueswir1 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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27 | fc56ef08 | blueswir1 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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28 | fc56ef08 | blueswir1 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 | fc56ef08 | blueswir1 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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30 | fc56ef08 | blueswir1 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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31 | fc56ef08 | blueswir1 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 | fc56ef08 | blueswir1 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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33 | fc56ef08 | blueswir1 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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34 | fc56ef08 | blueswir1 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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35 | fc56ef08 | blueswir1 | * SUCH DAMAGE.
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36 | fc56ef08 | blueswir1 | *
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37 | fc56ef08 | blueswir1 | * @(#)queue.h 8.5 (Berkeley) 8/20/94
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38 | fc56ef08 | blueswir1 | */
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39 | fc56ef08 | blueswir1 | |
40 | 72cf2d4f | Blue Swirl | #ifndef QEMU_SYS_QUEUE_H_
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41 | 72cf2d4f | Blue Swirl | #define QEMU_SYS_QUEUE_H_
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42 | fc56ef08 | blueswir1 | |
43 | fc56ef08 | blueswir1 | /*
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44 | c616bbe1 | Pierre Riteau | * This file defines four types of data structures:
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45 | c616bbe1 | Pierre Riteau | * lists, simple queues, tail queues, and circular queues.
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46 | fc56ef08 | blueswir1 | *
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47 | fc56ef08 | blueswir1 | * A list is headed by a single forward pointer (or an array of forward
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48 | fc56ef08 | blueswir1 | * pointers for a hash table header). The elements are doubly linked
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49 | fc56ef08 | blueswir1 | * so that an arbitrary element can be removed without a need to
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50 | fc56ef08 | blueswir1 | * traverse the list. New elements can be added to the list before
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51 | fc56ef08 | blueswir1 | * or after an existing element or at the head of the list. A list
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52 | fc56ef08 | blueswir1 | * may only be traversed in the forward direction.
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53 | fc56ef08 | blueswir1 | *
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54 | c616bbe1 | Pierre Riteau | * A simple queue is headed by a pair of pointers, one the head of the
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55 | c616bbe1 | Pierre Riteau | * list and the other to the tail of the list. The elements are singly
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56 | c616bbe1 | Pierre Riteau | * linked to save space, so elements can only be removed from the
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57 | c616bbe1 | Pierre Riteau | * head of the list. New elements can be added to the list after
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58 | c616bbe1 | Pierre Riteau | * an existing element, at the head of the list, or at the end of the
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59 | c616bbe1 | Pierre Riteau | * list. A simple queue may only be traversed in the forward direction.
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60 | c616bbe1 | Pierre Riteau | *
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61 | fc56ef08 | blueswir1 | * A tail queue is headed by a pair of pointers, one to the head of the
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62 | fc56ef08 | blueswir1 | * list and the other to the tail of the list. The elements are doubly
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63 | fc56ef08 | blueswir1 | * linked so that an arbitrary element can be removed without a need to
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64 | fc56ef08 | blueswir1 | * traverse the list. New elements can be added to the list before or
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65 | fc56ef08 | blueswir1 | * after an existing element, at the head of the list, or at the end of
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66 | fc56ef08 | blueswir1 | * the list. A tail queue may be traversed in either direction.
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67 | fc56ef08 | blueswir1 | *
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68 | fc56ef08 | blueswir1 | * A circle queue is headed by a pair of pointers, one to the head of the
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69 | fc56ef08 | blueswir1 | * list and the other to the tail of the list. The elements are doubly
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70 | fc56ef08 | blueswir1 | * linked so that an arbitrary element can be removed without a need to
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71 | fc56ef08 | blueswir1 | * traverse the list. New elements can be added to the list before or after
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72 | fc56ef08 | blueswir1 | * an existing element, at the head of the list, or at the end of the list.
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73 | fc56ef08 | blueswir1 | * A circle queue may be traversed in either direction, but has a more
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74 | fc56ef08 | blueswir1 | * complex end of list detection.
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75 | fc56ef08 | blueswir1 | *
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76 | fc56ef08 | blueswir1 | * For details on the use of these macros, see the queue(3) manual page.
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77 | fc56ef08 | blueswir1 | */
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78 | fc56ef08 | blueswir1 | |
79 | fc56ef08 | blueswir1 | /*
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80 | fc56ef08 | blueswir1 | * List definitions.
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81 | fc56ef08 | blueswir1 | */
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82 | 72cf2d4f | Blue Swirl | #define QLIST_HEAD(name, type) \
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83 | fc56ef08 | blueswir1 | struct name { \
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84 | fc56ef08 | blueswir1 | struct type *lh_first; /* first element */ \ |
85 | fc56ef08 | blueswir1 | } |
86 | fc56ef08 | blueswir1 | |
87 | 72cf2d4f | Blue Swirl | #define QLIST_HEAD_INITIALIZER(head) \
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88 | fc56ef08 | blueswir1 | { NULL }
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89 | fc56ef08 | blueswir1 | |
90 | 72cf2d4f | Blue Swirl | #define QLIST_ENTRY(type) \
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91 | fc56ef08 | blueswir1 | struct { \
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92 | fc56ef08 | blueswir1 | struct type *le_next; /* next element */ \ |
93 | fc56ef08 | blueswir1 | struct type **le_prev; /* address of previous next element */ \ |
94 | fc56ef08 | blueswir1 | } |
95 | fc56ef08 | blueswir1 | |
96 | fc56ef08 | blueswir1 | /*
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97 | fc56ef08 | blueswir1 | * List functions.
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98 | fc56ef08 | blueswir1 | */
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99 | 72cf2d4f | Blue Swirl | #define QLIST_INIT(head) do { \ |
100 | fc56ef08 | blueswir1 | (head)->lh_first = NULL; \
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101 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
102 | fc56ef08 | blueswir1 | |
103 | 72cf2d4f | Blue Swirl | #define QLIST_INSERT_AFTER(listelm, elm, field) do { \ |
104 | fc56ef08 | blueswir1 | if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \ |
105 | fc56ef08 | blueswir1 | (listelm)->field.le_next->field.le_prev = \ |
106 | fc56ef08 | blueswir1 | &(elm)->field.le_next; \ |
107 | fc56ef08 | blueswir1 | (listelm)->field.le_next = (elm); \ |
108 | fc56ef08 | blueswir1 | (elm)->field.le_prev = &(listelm)->field.le_next; \ |
109 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
110 | fc56ef08 | blueswir1 | |
111 | 72cf2d4f | Blue Swirl | #define QLIST_INSERT_BEFORE(listelm, elm, field) do { \ |
112 | fc56ef08 | blueswir1 | (elm)->field.le_prev = (listelm)->field.le_prev; \ |
113 | fc56ef08 | blueswir1 | (elm)->field.le_next = (listelm); \ |
114 | fc56ef08 | blueswir1 | *(listelm)->field.le_prev = (elm); \ |
115 | fc56ef08 | blueswir1 | (listelm)->field.le_prev = &(elm)->field.le_next; \ |
116 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
117 | fc56ef08 | blueswir1 | |
118 | 72cf2d4f | Blue Swirl | #define QLIST_INSERT_HEAD(head, elm, field) do { \ |
119 | fc56ef08 | blueswir1 | if (((elm)->field.le_next = (head)->lh_first) != NULL) \ |
120 | fc56ef08 | blueswir1 | (head)->lh_first->field.le_prev = &(elm)->field.le_next;\ |
121 | fc56ef08 | blueswir1 | (head)->lh_first = (elm); \ |
122 | fc56ef08 | blueswir1 | (elm)->field.le_prev = &(head)->lh_first; \ |
123 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
124 | fc56ef08 | blueswir1 | |
125 | 72cf2d4f | Blue Swirl | #define QLIST_REMOVE(elm, field) do { \ |
126 | fc56ef08 | blueswir1 | if ((elm)->field.le_next != NULL) \ |
127 | fc56ef08 | blueswir1 | (elm)->field.le_next->field.le_prev = \ |
128 | fc56ef08 | blueswir1 | (elm)->field.le_prev; \ |
129 | fc56ef08 | blueswir1 | *(elm)->field.le_prev = (elm)->field.le_next; \ |
130 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
131 | fc56ef08 | blueswir1 | |
132 | 72cf2d4f | Blue Swirl | #define QLIST_FOREACH(var, head, field) \
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133 | fc56ef08 | blueswir1 | for ((var) = ((head)->lh_first); \
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134 | fc56ef08 | blueswir1 | (var); \ |
135 | fc56ef08 | blueswir1 | (var) = ((var)->field.le_next)) |
136 | fc56ef08 | blueswir1 | |
137 | 72cf2d4f | Blue Swirl | #define QLIST_FOREACH_SAFE(var, head, field, next_var) \
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138 | bb150dc8 | Juan Quintela | for ((var) = ((head)->lh_first); \
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139 | bb150dc8 | Juan Quintela | (var) && ((next_var) = ((var)->field.le_next), 1); \
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140 | bb150dc8 | Juan Quintela | (var) = (next_var)) |
141 | bb150dc8 | Juan Quintela | |
142 | fc56ef08 | blueswir1 | /*
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143 | fc56ef08 | blueswir1 | * List access methods.
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144 | fc56ef08 | blueswir1 | */
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145 | 72cf2d4f | Blue Swirl | #define QLIST_EMPTY(head) ((head)->lh_first == NULL) |
146 | 72cf2d4f | Blue Swirl | #define QLIST_FIRST(head) ((head)->lh_first)
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147 | 72cf2d4f | Blue Swirl | #define QLIST_NEXT(elm, field) ((elm)->field.le_next)
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148 | fc56ef08 | blueswir1 | |
149 | fc56ef08 | blueswir1 | |
150 | fc56ef08 | blueswir1 | /*
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151 | c616bbe1 | Pierre Riteau | * Simple queue definitions.
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152 | c616bbe1 | Pierre Riteau | */
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153 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_HEAD(name, type) \
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154 | c616bbe1 | Pierre Riteau | struct name { \
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155 | c616bbe1 | Pierre Riteau | struct type *sqh_first; /* first element */ \ |
156 | c616bbe1 | Pierre Riteau | struct type **sqh_last; /* addr of last next element */ \ |
157 | c616bbe1 | Pierre Riteau | } |
158 | c616bbe1 | Pierre Riteau | |
159 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_HEAD_INITIALIZER(head) \
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160 | c616bbe1 | Pierre Riteau | { NULL, &(head).sqh_first }
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161 | c616bbe1 | Pierre Riteau | |
162 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_ENTRY(type) \
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163 | c616bbe1 | Pierre Riteau | struct { \
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164 | c616bbe1 | Pierre Riteau | struct type *sqe_next; /* next element */ \ |
165 | c616bbe1 | Pierre Riteau | } |
166 | c616bbe1 | Pierre Riteau | |
167 | c616bbe1 | Pierre Riteau | /*
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168 | c616bbe1 | Pierre Riteau | * Simple queue functions.
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169 | c616bbe1 | Pierre Riteau | */
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170 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_INIT(head) do { \ |
171 | c616bbe1 | Pierre Riteau | (head)->sqh_first = NULL; \
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172 | c616bbe1 | Pierre Riteau | (head)->sqh_last = &(head)->sqh_first; \ |
173 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
174 | c616bbe1 | Pierre Riteau | |
175 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_INSERT_HEAD(head, elm, field) do { \ |
176 | c616bbe1 | Pierre Riteau | if (((elm)->field.sqe_next = (head)->sqh_first) == NULL) \ |
177 | c616bbe1 | Pierre Riteau | (head)->sqh_last = &(elm)->field.sqe_next; \ |
178 | c616bbe1 | Pierre Riteau | (head)->sqh_first = (elm); \ |
179 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
180 | c616bbe1 | Pierre Riteau | |
181 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_INSERT_TAIL(head, elm, field) do { \ |
182 | c616bbe1 | Pierre Riteau | (elm)->field.sqe_next = NULL; \
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183 | c616bbe1 | Pierre Riteau | *(head)->sqh_last = (elm); \ |
184 | c616bbe1 | Pierre Riteau | (head)->sqh_last = &(elm)->field.sqe_next; \ |
185 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
186 | c616bbe1 | Pierre Riteau | |
187 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_INSERT_AFTER(head, listelm, elm, field) do { \ |
188 | c616bbe1 | Pierre Riteau | if (((elm)->field.sqe_next = (listelm)->field.sqe_next) == NULL) \ |
189 | c616bbe1 | Pierre Riteau | (head)->sqh_last = &(elm)->field.sqe_next; \ |
190 | c616bbe1 | Pierre Riteau | (listelm)->field.sqe_next = (elm); \ |
191 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
192 | c616bbe1 | Pierre Riteau | |
193 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_REMOVE_HEAD(head, field) do { \ |
194 | c616bbe1 | Pierre Riteau | if (((head)->sqh_first = (head)->sqh_first->field.sqe_next) == NULL)\ |
195 | c616bbe1 | Pierre Riteau | (head)->sqh_last = &(head)->sqh_first; \ |
196 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
197 | c616bbe1 | Pierre Riteau | |
198 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_REMOVE(head, elm, type, field) do { \ |
199 | c616bbe1 | Pierre Riteau | if ((head)->sqh_first == (elm)) { \
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200 | c616bbe1 | Pierre Riteau | QSIMPLEQ_REMOVE_HEAD((head), field); \ |
201 | c616bbe1 | Pierre Riteau | } else { \
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202 | c616bbe1 | Pierre Riteau | struct type *curelm = (head)->sqh_first; \
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203 | c616bbe1 | Pierre Riteau | while (curelm->field.sqe_next != (elm)) \
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204 | c616bbe1 | Pierre Riteau | curelm = curelm->field.sqe_next; \ |
205 | c616bbe1 | Pierre Riteau | if ((curelm->field.sqe_next = \
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206 | c616bbe1 | Pierre Riteau | curelm->field.sqe_next->field.sqe_next) == NULL) \
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207 | c616bbe1 | Pierre Riteau | (head)->sqh_last = &(curelm)->field.sqe_next; \ |
208 | c616bbe1 | Pierre Riteau | } \ |
209 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
210 | c616bbe1 | Pierre Riteau | |
211 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_FOREACH(var, head, field) \
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212 | c616bbe1 | Pierre Riteau | for ((var) = ((head)->sqh_first); \
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213 | c616bbe1 | Pierre Riteau | (var); \ |
214 | c616bbe1 | Pierre Riteau | (var) = ((var)->field.sqe_next)) |
215 | c616bbe1 | Pierre Riteau | |
216 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_FOREACH_SAFE(var, head, field, next) \
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217 | c616bbe1 | Pierre Riteau | for ((var) = ((head)->sqh_first); \
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218 | c616bbe1 | Pierre Riteau | (var) && ((next = ((var)->field.sqe_next)), 1); \
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219 | c616bbe1 | Pierre Riteau | (var) = (next)) |
220 | c616bbe1 | Pierre Riteau | |
221 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_CONCAT(head1, head2) do { \ |
222 | c616bbe1 | Pierre Riteau | if (!QSIMPLEQ_EMPTY((head2))) { \
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223 | c616bbe1 | Pierre Riteau | *(head1)->sqh_last = (head2)->sqh_first; \ |
224 | c616bbe1 | Pierre Riteau | (head1)->sqh_last = (head2)->sqh_last; \ |
225 | c616bbe1 | Pierre Riteau | QSIMPLEQ_INIT((head2)); \ |
226 | c616bbe1 | Pierre Riteau | } \ |
227 | c616bbe1 | Pierre Riteau | } while (/*CONSTCOND*/0) |
228 | c616bbe1 | Pierre Riteau | |
229 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_LAST(head, type, field) \
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230 | c616bbe1 | Pierre Riteau | (QSIMPLEQ_EMPTY((head)) ? \ |
231 | c616bbe1 | Pierre Riteau | NULL : \
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232 | c616bbe1 | Pierre Riteau | ((struct type *)(void *) \ |
233 | c616bbe1 | Pierre Riteau | ((char *)((head)->sqh_last) - offsetof(struct type, field)))) |
234 | c616bbe1 | Pierre Riteau | |
235 | c616bbe1 | Pierre Riteau | /*
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236 | c616bbe1 | Pierre Riteau | * Simple queue access methods.
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237 | c616bbe1 | Pierre Riteau | */
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238 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_EMPTY(head) ((head)->sqh_first == NULL) |
239 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_FIRST(head) ((head)->sqh_first)
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240 | c616bbe1 | Pierre Riteau | #define QSIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next)
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241 | c616bbe1 | Pierre Riteau | |
242 | c616bbe1 | Pierre Riteau | |
243 | c616bbe1 | Pierre Riteau | /*
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244 | fc56ef08 | blueswir1 | * Tail queue definitions.
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245 | fc56ef08 | blueswir1 | */
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246 | 72cf2d4f | Blue Swirl | #define Q_TAILQ_HEAD(name, type, qual) \
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247 | fc56ef08 | blueswir1 | struct name { \
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248 | fc56ef08 | blueswir1 | qual type *tqh_first; /* first element */ \
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249 | fc56ef08 | blueswir1 | qual type *qual *tqh_last; /* addr of last next element */ \
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250 | fc56ef08 | blueswir1 | } |
251 | 72cf2d4f | Blue Swirl | #define QTAILQ_HEAD(name, type) Q_TAILQ_HEAD(name, struct type,) |
252 | fc56ef08 | blueswir1 | |
253 | 72cf2d4f | Blue Swirl | #define QTAILQ_HEAD_INITIALIZER(head) \
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254 | fc56ef08 | blueswir1 | { NULL, &(head).tqh_first }
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255 | fc56ef08 | blueswir1 | |
256 | 72cf2d4f | Blue Swirl | #define Q_TAILQ_ENTRY(type, qual) \
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257 | fc56ef08 | blueswir1 | struct { \
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258 | fc56ef08 | blueswir1 | qual type *tqe_next; /* next element */ \
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259 | fc56ef08 | blueswir1 | qual type *qual *tqe_prev; /* address of previous next element */\
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260 | fc56ef08 | blueswir1 | } |
261 | 72cf2d4f | Blue Swirl | #define QTAILQ_ENTRY(type) Q_TAILQ_ENTRY(struct type,) |
262 | fc56ef08 | blueswir1 | |
263 | fc56ef08 | blueswir1 | /*
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264 | fc56ef08 | blueswir1 | * Tail queue functions.
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265 | fc56ef08 | blueswir1 | */
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266 | 72cf2d4f | Blue Swirl | #define QTAILQ_INIT(head) do { \ |
267 | fc56ef08 | blueswir1 | (head)->tqh_first = NULL; \
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268 | fc56ef08 | blueswir1 | (head)->tqh_last = &(head)->tqh_first; \ |
269 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
270 | fc56ef08 | blueswir1 | |
271 | 72cf2d4f | Blue Swirl | #define QTAILQ_INSERT_HEAD(head, elm, field) do { \ |
272 | fc56ef08 | blueswir1 | if (((elm)->field.tqe_next = (head)->tqh_first) != NULL) \ |
273 | fc56ef08 | blueswir1 | (head)->tqh_first->field.tqe_prev = \ |
274 | fc56ef08 | blueswir1 | &(elm)->field.tqe_next; \ |
275 | fc56ef08 | blueswir1 | else \
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276 | fc56ef08 | blueswir1 | (head)->tqh_last = &(elm)->field.tqe_next; \ |
277 | fc56ef08 | blueswir1 | (head)->tqh_first = (elm); \ |
278 | fc56ef08 | blueswir1 | (elm)->field.tqe_prev = &(head)->tqh_first; \ |
279 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
280 | fc56ef08 | blueswir1 | |
281 | 72cf2d4f | Blue Swirl | #define QTAILQ_INSERT_TAIL(head, elm, field) do { \ |
282 | fc56ef08 | blueswir1 | (elm)->field.tqe_next = NULL; \
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283 | fc56ef08 | blueswir1 | (elm)->field.tqe_prev = (head)->tqh_last; \ |
284 | fc56ef08 | blueswir1 | *(head)->tqh_last = (elm); \ |
285 | fc56ef08 | blueswir1 | (head)->tqh_last = &(elm)->field.tqe_next; \ |
286 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
287 | fc56ef08 | blueswir1 | |
288 | 72cf2d4f | Blue Swirl | #define QTAILQ_INSERT_AFTER(head, listelm, elm, field) do { \ |
289 | fc56ef08 | blueswir1 | if (((elm)->field.tqe_next = (listelm)->field.tqe_next) != NULL)\ |
290 | fc56ef08 | blueswir1 | (elm)->field.tqe_next->field.tqe_prev = \ |
291 | fc56ef08 | blueswir1 | &(elm)->field.tqe_next; \ |
292 | fc56ef08 | blueswir1 | else \
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293 | fc56ef08 | blueswir1 | (head)->tqh_last = &(elm)->field.tqe_next; \ |
294 | fc56ef08 | blueswir1 | (listelm)->field.tqe_next = (elm); \ |
295 | fc56ef08 | blueswir1 | (elm)->field.tqe_prev = &(listelm)->field.tqe_next; \ |
296 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
297 | fc56ef08 | blueswir1 | |
298 | 72cf2d4f | Blue Swirl | #define QTAILQ_INSERT_BEFORE(listelm, elm, field) do { \ |
299 | fc56ef08 | blueswir1 | (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \ |
300 | fc56ef08 | blueswir1 | (elm)->field.tqe_next = (listelm); \ |
301 | fc56ef08 | blueswir1 | *(listelm)->field.tqe_prev = (elm); \ |
302 | fc56ef08 | blueswir1 | (listelm)->field.tqe_prev = &(elm)->field.tqe_next; \ |
303 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
304 | fc56ef08 | blueswir1 | |
305 | 72cf2d4f | Blue Swirl | #define QTAILQ_REMOVE(head, elm, field) do { \ |
306 | fc56ef08 | blueswir1 | if (((elm)->field.tqe_next) != NULL) \ |
307 | fc56ef08 | blueswir1 | (elm)->field.tqe_next->field.tqe_prev = \ |
308 | fc56ef08 | blueswir1 | (elm)->field.tqe_prev; \ |
309 | fc56ef08 | blueswir1 | else \
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310 | fc56ef08 | blueswir1 | (head)->tqh_last = (elm)->field.tqe_prev; \ |
311 | fc56ef08 | blueswir1 | *(elm)->field.tqe_prev = (elm)->field.tqe_next; \ |
312 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
313 | fc56ef08 | blueswir1 | |
314 | 72cf2d4f | Blue Swirl | #define QTAILQ_FOREACH(var, head, field) \
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315 | fc56ef08 | blueswir1 | for ((var) = ((head)->tqh_first); \
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316 | fc56ef08 | blueswir1 | (var); \ |
317 | fc56ef08 | blueswir1 | (var) = ((var)->field.tqe_next)) |
318 | fc56ef08 | blueswir1 | |
319 | 72cf2d4f | Blue Swirl | #define QTAILQ_FOREACH_SAFE(var, head, field, next_var) \
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320 | fc56ef08 | blueswir1 | for ((var) = ((head)->tqh_first); \
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321 | fc56ef08 | blueswir1 | (var) && ((next_var) = ((var)->field.tqe_next), 1); \
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322 | fc56ef08 | blueswir1 | (var) = (next_var)) |
323 | fc56ef08 | blueswir1 | |
324 | 72cf2d4f | Blue Swirl | #define QTAILQ_FOREACH_REVERSE(var, head, headname, field) \
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325 | fc56ef08 | blueswir1 | for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last)); \ |
326 | fc56ef08 | blueswir1 | (var); \ |
327 | fc56ef08 | blueswir1 | (var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
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328 | fc56ef08 | blueswir1 | |
329 | fc56ef08 | blueswir1 | /*
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330 | fc56ef08 | blueswir1 | * Tail queue access methods.
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331 | fc56ef08 | blueswir1 | */
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332 | 72cf2d4f | Blue Swirl | #define QTAILQ_EMPTY(head) ((head)->tqh_first == NULL) |
333 | 72cf2d4f | Blue Swirl | #define QTAILQ_FIRST(head) ((head)->tqh_first)
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334 | 72cf2d4f | Blue Swirl | #define QTAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
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335 | fc56ef08 | blueswir1 | |
336 | 72cf2d4f | Blue Swirl | #define QTAILQ_LAST(head, headname) \
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337 | fc56ef08 | blueswir1 | (*(((struct headname *)((head)->tqh_last))->tqh_last))
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338 | 72cf2d4f | Blue Swirl | #define QTAILQ_PREV(elm, headname, field) \
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339 | fc56ef08 | blueswir1 | (*(((struct headname *)((elm)->field.tqe_prev))->tqh_last))
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340 | fc56ef08 | blueswir1 | |
341 | fc56ef08 | blueswir1 | |
342 | fc56ef08 | blueswir1 | /*
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343 | fc56ef08 | blueswir1 | * Circular queue definitions.
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344 | fc56ef08 | blueswir1 | */
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345 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_HEAD(name, type) \
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346 | fc56ef08 | blueswir1 | struct name { \
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347 | fc56ef08 | blueswir1 | struct type *cqh_first; /* first element */ \ |
348 | fc56ef08 | blueswir1 | struct type *cqh_last; /* last element */ \ |
349 | fc56ef08 | blueswir1 | } |
350 | fc56ef08 | blueswir1 | |
351 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_HEAD_INITIALIZER(head) \
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352 | fc56ef08 | blueswir1 | { (void *)&head, (void *)&head } |
353 | fc56ef08 | blueswir1 | |
354 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_ENTRY(type) \
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355 | fc56ef08 | blueswir1 | struct { \
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356 | fc56ef08 | blueswir1 | struct type *cqe_next; /* next element */ \ |
357 | fc56ef08 | blueswir1 | struct type *cqe_prev; /* previous element */ \ |
358 | fc56ef08 | blueswir1 | } |
359 | fc56ef08 | blueswir1 | |
360 | fc56ef08 | blueswir1 | /*
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361 | fc56ef08 | blueswir1 | * Circular queue functions.
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362 | fc56ef08 | blueswir1 | */
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363 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_INIT(head) do { \ |
364 | fc56ef08 | blueswir1 | (head)->cqh_first = (void *)(head); \
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365 | fc56ef08 | blueswir1 | (head)->cqh_last = (void *)(head); \
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366 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
367 | fc56ef08 | blueswir1 | |
368 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_INSERT_AFTER(head, listelm, elm, field) do { \ |
369 | fc56ef08 | blueswir1 | (elm)->field.cqe_next = (listelm)->field.cqe_next; \ |
370 | fc56ef08 | blueswir1 | (elm)->field.cqe_prev = (listelm); \ |
371 | fc56ef08 | blueswir1 | if ((listelm)->field.cqe_next == (void *)(head)) \ |
372 | fc56ef08 | blueswir1 | (head)->cqh_last = (elm); \ |
373 | fc56ef08 | blueswir1 | else \
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374 | fc56ef08 | blueswir1 | (listelm)->field.cqe_next->field.cqe_prev = (elm); \ |
375 | fc56ef08 | blueswir1 | (listelm)->field.cqe_next = (elm); \ |
376 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
377 | fc56ef08 | blueswir1 | |
378 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_INSERT_BEFORE(head, listelm, elm, field) do { \ |
379 | fc56ef08 | blueswir1 | (elm)->field.cqe_next = (listelm); \ |
380 | fc56ef08 | blueswir1 | (elm)->field.cqe_prev = (listelm)->field.cqe_prev; \ |
381 | fc56ef08 | blueswir1 | if ((listelm)->field.cqe_prev == (void *)(head)) \ |
382 | fc56ef08 | blueswir1 | (head)->cqh_first = (elm); \ |
383 | fc56ef08 | blueswir1 | else \
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384 | fc56ef08 | blueswir1 | (listelm)->field.cqe_prev->field.cqe_next = (elm); \ |
385 | fc56ef08 | blueswir1 | (listelm)->field.cqe_prev = (elm); \ |
386 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
387 | fc56ef08 | blueswir1 | |
388 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_INSERT_HEAD(head, elm, field) do { \ |
389 | fc56ef08 | blueswir1 | (elm)->field.cqe_next = (head)->cqh_first; \ |
390 | fc56ef08 | blueswir1 | (elm)->field.cqe_prev = (void *)(head); \
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391 | fc56ef08 | blueswir1 | if ((head)->cqh_last == (void *)(head)) \ |
392 | fc56ef08 | blueswir1 | (head)->cqh_last = (elm); \ |
393 | fc56ef08 | blueswir1 | else \
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394 | fc56ef08 | blueswir1 | (head)->cqh_first->field.cqe_prev = (elm); \ |
395 | fc56ef08 | blueswir1 | (head)->cqh_first = (elm); \ |
396 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
397 | fc56ef08 | blueswir1 | |
398 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_INSERT_TAIL(head, elm, field) do { \ |
399 | fc56ef08 | blueswir1 | (elm)->field.cqe_next = (void *)(head); \
|
400 | fc56ef08 | blueswir1 | (elm)->field.cqe_prev = (head)->cqh_last; \ |
401 | fc56ef08 | blueswir1 | if ((head)->cqh_first == (void *)(head)) \ |
402 | fc56ef08 | blueswir1 | (head)->cqh_first = (elm); \ |
403 | fc56ef08 | blueswir1 | else \
|
404 | fc56ef08 | blueswir1 | (head)->cqh_last->field.cqe_next = (elm); \ |
405 | fc56ef08 | blueswir1 | (head)->cqh_last = (elm); \ |
406 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
407 | fc56ef08 | blueswir1 | |
408 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_REMOVE(head, elm, field) do { \ |
409 | fc56ef08 | blueswir1 | if ((elm)->field.cqe_next == (void *)(head)) \ |
410 | fc56ef08 | blueswir1 | (head)->cqh_last = (elm)->field.cqe_prev; \ |
411 | fc56ef08 | blueswir1 | else \
|
412 | fc56ef08 | blueswir1 | (elm)->field.cqe_next->field.cqe_prev = \ |
413 | fc56ef08 | blueswir1 | (elm)->field.cqe_prev; \ |
414 | fc56ef08 | blueswir1 | if ((elm)->field.cqe_prev == (void *)(head)) \ |
415 | fc56ef08 | blueswir1 | (head)->cqh_first = (elm)->field.cqe_next; \ |
416 | fc56ef08 | blueswir1 | else \
|
417 | fc56ef08 | blueswir1 | (elm)->field.cqe_prev->field.cqe_next = \ |
418 | fc56ef08 | blueswir1 | (elm)->field.cqe_next; \ |
419 | fc56ef08 | blueswir1 | } while (/*CONSTCOND*/0) |
420 | fc56ef08 | blueswir1 | |
421 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_FOREACH(var, head, field) \
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422 | fc56ef08 | blueswir1 | for ((var) = ((head)->cqh_first); \
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423 | fc56ef08 | blueswir1 | (var) != (const void *)(head); \ |
424 | fc56ef08 | blueswir1 | (var) = ((var)->field.cqe_next)) |
425 | fc56ef08 | blueswir1 | |
426 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_FOREACH_REVERSE(var, head, field) \
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427 | fc56ef08 | blueswir1 | for ((var) = ((head)->cqh_last); \
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428 | fc56ef08 | blueswir1 | (var) != (const void *)(head); \ |
429 | fc56ef08 | blueswir1 | (var) = ((var)->field.cqe_prev)) |
430 | fc56ef08 | blueswir1 | |
431 | fc56ef08 | blueswir1 | /*
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432 | fc56ef08 | blueswir1 | * Circular queue access methods.
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433 | fc56ef08 | blueswir1 | */
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434 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_EMPTY(head) ((head)->cqh_first == (void *)(head)) |
435 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_FIRST(head) ((head)->cqh_first)
|
436 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_LAST(head) ((head)->cqh_last)
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437 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_NEXT(elm, field) ((elm)->field.cqe_next)
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438 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_PREV(elm, field) ((elm)->field.cqe_prev)
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439 | fc56ef08 | blueswir1 | |
440 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_LOOP_NEXT(head, elm, field) \
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441 | fc56ef08 | blueswir1 | (((elm)->field.cqe_next == (void *)(head)) \
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442 | fc56ef08 | blueswir1 | ? ((head)->cqh_first) \ |
443 | fc56ef08 | blueswir1 | : (elm->field.cqe_next)) |
444 | 72cf2d4f | Blue Swirl | #define QCIRCLEQ_LOOP_PREV(head, elm, field) \
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445 | fc56ef08 | blueswir1 | (((elm)->field.cqe_prev == (void *)(head)) \
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446 | fc56ef08 | blueswir1 | ? ((head)->cqh_last) \ |
447 | fc56ef08 | blueswir1 | : (elm->field.cqe_prev)) |
448 | fc56ef08 | blueswir1 | |
449 | 72cf2d4f | Blue Swirl | #endif /* !QEMU_SYS_QUEUE_H_ */ |