1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* list.c - Doubly linked list implementation
* Copyright (C) 2013-2015 Jiri Pirko <jiri@resnulli.us>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _LIST_H_
#define _LIST_H_
#include <stdbool.h>
struct list_item {
struct list_item *prev;
struct list_item *next;
};
static inline void list_init(struct list_item *head)
{
head->prev = head;
head->next = head;
}
static inline bool list_empty(struct list_item *head)
{
return head->next == head;
}
static inline void __list_add(struct list_item *new_node,
struct list_item *prev_node,
struct list_item *next_node)
{
new_node->prev = prev_node;
new_node->next = next_node;
prev_node->next = new_node;
next_node->prev = new_node;
}
static inline void list_add(struct list_item *head, struct list_item *node)
{
__list_add(node, head, head->next);
}
static inline void list_add_tail(struct list_item *head, struct list_item *node)
{
__list_add(node, head->prev, head);
}
static inline void list_del(struct list_item *node)
{
node->prev->next = node->next;
node->next->prev = node->prev;
}
static inline void list_move_nodes(struct list_item *dst_head,
struct list_item *src_head)
{
if (list_empty(src_head))
return;
dst_head->prev->next = src_head->next;
src_head->next->prev = dst_head->prev;
dst_head->prev = src_head->prev;
src_head->prev->next = dst_head;
list_init(src_head);
}
static inline struct list_item *list_get_next_node(struct list_item *head,
struct list_item *node)
{
if (node->next == head)
return NULL;
return node->next;
}
#define list_for_each_node(node, head) \
for (node = list_get_next_node(head, head); \
node; \
node = list_get_next_node(head, node))
#define in_struct_offset(struct_type, struct_member) \
((size_t) (&((struct_type *) 0)->struct_member))
#define get_container(ptr, struct_type, struct_member) \
((struct_type *) ( \
((size_t) ptr) - \
in_struct_offset(struct_type, struct_member)))
#define list_get_node_entry(node, struct_type, struct_member) \
get_container(node, struct_type, struct_member)
#define list_for_each_node_entry(entry, head, struct_member) \
for (entry = list_get_node_entry((head)->next, typeof(*entry), \
struct_member); \
&entry->struct_member != (head); \
entry = list_get_node_entry(entry->struct_member.next, \
typeof(*entry), struct_member))
#define list_for_each_node_entry_continue_reverse(entry, head, struct_member) \
for (entry = list_get_node_entry(entry->struct_member.prev, \
typeof(*entry), struct_member); \
&entry->struct_member != (head); \
entry = list_get_node_entry(entry->struct_member.prev, \
typeof(*entry), struct_member))
#define list_for_each_node_entry_safe(entry, tmp, head, struct_member) \
for (entry = list_get_node_entry((head)->next, \
typeof(*entry), struct_member), \
tmp = list_get_node_entry(entry->struct_member.next, \
typeof(*entry), struct_member); \
&entry->struct_member != (head); \
entry = tmp, \
tmp = list_get_node_entry(entry->struct_member.next, \
typeof(*entry), struct_member))
#define list_get_next_node_entry(head, entry, struct_member) ({ \
struct list_item *next = (entry ? &entry->struct_member : (head))->next;\
(next == (head)) ? NULL : list_get_node_entry(next, typeof(*entry), \
struct_member);})
#endif /* _LIST_H_ */
|
