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1 | /* |
2 | * klist.h - Some generic list helpers, extending struct list_head a bit. |
3 | * |
4 | * Implementations are found in lib/klist.c |
5 | * |
6 | * |
7 | * Copyright (C) 2005 Patrick Mochel |
8 | * |
9 | * This file is rleased under the GPL v2. |
10 | */ |
11 | |
12 | #ifndef _LINUX_KLIST_H |
13 | #define _LINUX_KLIST_H |
14 | |
15 | #include <linux/spinlock.h> |
16 | #include <linux/kref.h> |
17 | #include <linux/list.h> |
18 | |
19 | struct klist_node; |
20 | struct klist { |
21 | spinlock_t k_lock; |
22 | struct list_head k_list; |
23 | void (*get)(struct klist_node *); |
24 | void (*put)(struct klist_node *); |
25 | } __attribute__ ((aligned (sizeof(void *)))); |
26 | |
27 | #define KLIST_INIT(_name, _get, _put) \ |
28 | { .k_lock = __SPIN_LOCK_UNLOCKED(_name.k_lock), \ |
29 | .k_list = LIST_HEAD_INIT(_name.k_list), \ |
30 | .get = _get, \ |
31 | .put = _put, } |
32 | |
33 | #define DEFINE_KLIST(_name, _get, _put) \ |
34 | struct klist _name = KLIST_INIT(_name, _get, _put) |
35 | |
36 | extern void klist_init(struct klist *k, void (*get)(struct klist_node *), |
37 | void (*put)(struct klist_node *)); |
38 | |
39 | struct klist_node { |
40 | void *n_klist; /* never access directly */ |
41 | struct list_head n_node; |
42 | struct kref n_ref; |
43 | }; |
44 | |
45 | extern void klist_add_tail(struct klist_node *n, struct klist *k); |
46 | extern void klist_add_head(struct klist_node *n, struct klist *k); |
47 | extern void klist_add_after(struct klist_node *n, struct klist_node *pos); |
48 | extern void klist_add_before(struct klist_node *n, struct klist_node *pos); |
49 | |
50 | extern void klist_del(struct klist_node *n); |
51 | extern void klist_remove(struct klist_node *n); |
52 | |
53 | extern int klist_node_attached(struct klist_node *n); |
54 | |
55 | |
56 | struct klist_iter { |
57 | struct klist *i_klist; |
58 | struct klist_node *i_cur; |
59 | }; |
60 | |
61 | |
62 | extern void klist_iter_init(struct klist *k, struct klist_iter *i); |
63 | extern void klist_iter_init_node(struct klist *k, struct klist_iter *i, |
64 | struct klist_node *n); |
65 | extern void klist_iter_exit(struct klist_iter *i); |
66 | extern struct klist_node *klist_next(struct klist_iter *i); |
67 | |
68 | #endif |
69 |
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