FreeBSD/Linux Kernel Cross Reference
sys/dev/hptrr/list.h
1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) HighPoint Technologies, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: releng/12.0/sys/dev/hptrr/list.h 326255 2017-11-27 14:52:40Z pfg $
29 */
30 #include <dev/hptrr/hptrr_config.h>
31 /*
32 * $Id: list.h,v 1.6 2006/10/31 06:25:28 gmm Exp $
33 * Copyright (C) 2004-2005 HighPoint Technologies, Inc. All rights reserved.
34 */
35 #ifndef _HPT_LIST_H_
36 #define _HPT_LIST_H_
37
38 #ifndef _LINUX_LIST_H
39
40 #ifndef HPT_INLINE
41 #define HPT_INLINE __inline
42 #endif
43
44 struct list_head {
45 struct list_head *next, *prev;
46 };
47
48 #define INIT_LIST_HEAD(ptr) do { (ptr)->next = (ptr); (ptr)->prev = (ptr); } while (0)
49
50 static HPT_INLINE void __list_add(struct list_head * _new, struct list_head * prev, struct list_head * next)
51 {
52 next->prev = _new;
53 _new->next = next;
54 _new->prev = prev;
55 prev->next = _new;
56 }
57
58 static HPT_INLINE void list_add(struct list_head *_new, struct list_head *head)
59 {
60 __list_add(_new, head, head->next);
61 }
62
63 static HPT_INLINE void list_add_tail(struct list_head *_new, struct list_head *head)
64 {
65 __list_add(_new, head->prev, head);
66 }
67
68 static HPT_INLINE void __list_del(struct list_head * prev, struct list_head * next)
69 {
70 next->prev = prev;
71 prev->next = next;
72 }
73
74 static HPT_INLINE void list_del(struct list_head *entry)
75 {
76 __list_del(entry->prev, entry->next);
77 }
78
79 static HPT_INLINE void list_del_init(struct list_head *entry)
80 {
81 __list_del(entry->prev, entry->next);
82 INIT_LIST_HEAD(entry);
83 }
84
85 static HPT_INLINE int list_empty(struct list_head *head)
86 {
87 HPT_ASSERT(!(head->next==head && head->prev!=head));
88 return head->next == head;
89 }
90
91 static HPT_INLINE void __list_splice(struct list_head *list,
92 struct list_head *head)
93 {
94 struct list_head *first = list->next;
95 struct list_head *last = list->prev;
96 struct list_head *at = head->next;
97
98 first->prev = head;
99 head->next = first;
100
101 last->next = at;
102 at->prev = last;
103 }
104
105 static HPT_INLINE void list_splice(struct list_head *list, struct list_head *head)
106 {
107 if (!list_empty(list))
108 __list_splice(list, head);
109 }
110
111 static HPT_INLINE void list_splice_init(struct list_head *list, struct list_head *head)
112 {
113 if (!list_empty(list)) {
114 __list_splice(list, head);
115 INIT_LIST_HEAD(list);
116 }
117 }
118
119 #define list_entry(ptr, type, member) \
120 ((type *)((char *)(ptr)-(HPT_UPTR)(&((type *)0)->member)))
121
122 #define list_for_each(pos, head) \
123 for (pos = (head)->next; pos != (head); pos = pos->next)
124
125 #define list_for_each_safe(pos, n, head) \
126 for (pos = (head)->next, n = pos->next; pos != (head); \
127 pos = n, n = pos->next)
128
129 #define get_first_item(attached, type, member) \
130 ((type *)((char *)((attached)->next)-(HPT_UPTR)(&((type *)0)->member)))
131
132 #endif
133
134 #endif
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