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-rw-r--r--scripts/kconfig/list.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/scripts/kconfig/list.h b/scripts/kconfig/list.h
new file mode 100644
index 000000000000..0ae730be5f49
--- /dev/null
+++ b/scripts/kconfig/list.h
@@ -0,0 +1,91 @@
1#ifndef LIST_H
2#define LIST_H
3
4/*
5 * Copied from include/linux/...
6 */
7
8#undef offsetof
9#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
10
11/**
12 * container_of - cast a member of a structure out to the containing structure
13 * @ptr: the pointer to the member.
14 * @type: the type of the container struct this is embedded in.
15 * @member: the name of the member within the struct.
16 *
17 */
18#define container_of(ptr, type, member) ({ \
19 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
20 (type *)( (char *)__mptr - offsetof(type,member) );})
21
22
23struct list_head {
24 struct list_head *next, *prev;
25};
26
27
28#define LIST_HEAD_INIT(name) { &(name), &(name) }
29
30#define LIST_HEAD(name) \
31 struct list_head name = LIST_HEAD_INIT(name)
32
33/**
34 * list_entry - get the struct for this entry
35 * @ptr: the &struct list_head pointer.
36 * @type: the type of the struct this is embedded in.
37 * @member: the name of the list_struct within the struct.
38 */
39#define list_entry(ptr, type, member) \
40 container_of(ptr, type, member)
41
42/**
43 * list_for_each_entry - iterate over list of given type
44 * @pos: the type * to use as a loop cursor.
45 * @head: the head for your list.
46 * @member: the name of the list_struct within the struct.
47 */
48#define list_for_each_entry(pos, head, member) \
49 for (pos = list_entry((head)->next, typeof(*pos), member); \
50 &pos->member != (head); \
51 pos = list_entry(pos->member.next, typeof(*pos), member))
52
53/**
54 * list_empty - tests whether a list is empty
55 * @head: the list to test.
56 */
57static inline int list_empty(const struct list_head *head)
58{
59 return head->next == head;
60}
61
62/*
63 * Insert a new entry between two known consecutive entries.
64 *
65 * This is only for internal list manipulation where we know
66 * the prev/next entries already!
67 */
68static inline void __list_add(struct list_head *_new,
69 struct list_head *prev,
70 struct list_head *next)
71{
72 next->prev = _new;
73 _new->next = next;
74 _new->prev = prev;
75 prev->next = _new;
76}
77
78/**
79 * list_add_tail - add a new entry
80 * @new: new entry to be added
81 * @head: list head to add it before
82 *
83 * Insert a new entry before the specified head.
84 * This is useful for implementing queues.
85 */
86static inline void list_add_tail(struct list_head *_new, struct list_head *head)
87{
88 __list_add(_new, head->prev, head);
89}
90
91#endif