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9a19fea4 PM |
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 | ||
d856f1e3 JB |
12 | #ifndef _LINUX_KLIST_H |
13 | #define _LINUX_KLIST_H | |
14 | ||
9a19fea4 PM |
15 | #include <linux/spinlock.h> |
16 | #include <linux/completion.h> | |
17 | #include <linux/kref.h> | |
18 | #include <linux/list.h> | |
19 | ||
34bb61f9 | 20 | struct klist_node; |
9a19fea4 PM |
21 | struct klist { |
22 | spinlock_t k_lock; | |
23 | struct list_head k_list; | |
34bb61f9 JB |
24 | void (*get)(struct klist_node *); |
25 | void (*put)(struct klist_node *); | |
9a19fea4 PM |
26 | }; |
27 | ||
1da43e4a TH |
28 | #define KLIST_INIT(_name, _get, _put) \ |
29 | { .k_lock = __SPIN_LOCK_UNLOCKED(_name.k_lock), \ | |
30 | .k_list = LIST_HEAD_INIT(_name.k_list), \ | |
31 | .get = _get, \ | |
32 | .put = _put, } | |
33 | ||
34 | #define DEFINE_KLIST(_name, _get, _put) \ | |
35 | struct klist _name = KLIST_INIT(_name, _get, _put) | |
9a19fea4 | 36 | |
34bb61f9 JB |
37 | extern void klist_init(struct klist * k, void (*get)(struct klist_node *), |
38 | void (*put)(struct klist_node *)); | |
9a19fea4 PM |
39 | |
40 | struct klist_node { | |
41 | struct klist * n_klist; | |
42 | struct list_head n_node; | |
43 | struct kref n_ref; | |
44 | struct completion n_removed; | |
45 | }; | |
46 | ||
d856f1e3 JB |
47 | extern void klist_add_tail(struct klist_node * n, struct klist * k); |
48 | extern void klist_add_head(struct klist_node * n, struct klist * k); | |
93dd4001 TH |
49 | extern void klist_add_after(struct klist_node *n, struct klist_node *pos); |
50 | extern void klist_add_before(struct klist_node *n, struct klist_node *pos); | |
9a19fea4 PM |
51 | |
52 | extern void klist_del(struct klist_node * n); | |
53 | extern void klist_remove(struct klist_node * n); | |
54 | ||
8b0c250b PM |
55 | extern int klist_node_attached(struct klist_node * n); |
56 | ||
9a19fea4 PM |
57 | |
58 | struct klist_iter { | |
59 | struct klist * i_klist; | |
60 | struct list_head * i_head; | |
61 | struct klist_node * i_cur; | |
62 | }; | |
63 | ||
64 | ||
65 | extern void klist_iter_init(struct klist * k, struct klist_iter * i); | |
66 | extern void klist_iter_init_node(struct klist * k, struct klist_iter * i, | |
67 | struct klist_node * n); | |
68 | extern void klist_iter_exit(struct klist_iter * i); | |
69 | extern struct klist_node * klist_next(struct klist_iter * i); | |
70 | ||
d856f1e3 | 71 | #endif |