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gerrit-public.fairphone.software / kernel / msm-4.9 / a83fe32fa668c0a17b3f99a1480b006f7d649924 / . / include / linux / klist.h
blob: 06c338ef7f1b9ee62cc43fa4e30e9d79a3acc072 [file] [log] [blame]
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]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
James Bottomleyd856f1e32005-08-19 09:14:01 -0400[diff] [blame]12#ifndef _LINUX_KLIST_H
13#define _LINUX_KLIST_H
14
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]15#include <linux/spinlock.h>
16#include <linux/completion.h>
17#include <linux/kref.h>
18#include <linux/list.h>
19
James Bottomley34bb61f2005-09-06 16:56:51 -0700[diff] [blame]20struct klist_node;
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]21struct klist {
22 spinlock_t k_lock;
23 struct list_head k_list;
James Bottomley34bb61f2005-09-06 16:56:51 -0700[diff] [blame]24 void (*get)(struct klist_node *);
25 void (*put)(struct klist_node *);
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]26};
27
Tejun Heo1da43e42008-04-26 03:16:04 +0900[diff] [blame]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)
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]36
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]37extern void klist_init(struct klist *k, void (*get)(struct klist_node *),
James Bottomley34bb61f2005-09-06 16:56:51 -0700[diff] [blame]38 void (*put)(struct klist_node *));
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]39
40struct klist_node {
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]41 struct klist *n_klist;
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]42 struct list_head n_node;
43 struct kref n_ref;
44 struct completion n_removed;
45};
46
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]47extern void klist_add_tail(struct klist_node *n, struct klist *k);
48extern void klist_add_head(struct klist_node *n, struct klist *k);
Tejun Heo93dd4002008-04-22 18:58:46 +0900[diff] [blame]49extern void klist_add_after(struct klist_node *n, struct klist_node *pos);
50extern void klist_add_before(struct klist_node *n, struct klist_node *pos);
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]51
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]52extern void klist_del(struct klist_node *n);
53extern void klist_remove(struct klist_node *n);
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]54
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]55extern int klist_node_attached(struct klist_node *n);
mochel@digitalimplant.org8b0c2502005-03-24 12:58:57 -0800[diff] [blame]56
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]57
58struct klist_iter {
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]59 struct klist *i_klist;
60 struct list_head *i_head;
61 struct klist_node *i_cur;
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]62};
63
64
Greg Kroah-Hartmanc3bb7fad2008-04-30 16:43:45 -0700[diff] [blame]65extern void klist_iter_init(struct klist *k, struct klist_iter *i);
66extern void klist_iter_init_node(struct klist *k, struct klist_iter *i,
67 struct klist_node *n);
68extern void klist_iter_exit(struct klist_iter *i);
69extern struct klist_node *klist_next(struct klist_iter *i);
mochel@digitalimplant.org9a19fea2005-03-21 11:45:16 -0800[diff] [blame]70
James Bottomleyd856f1e32005-08-19 09:14:01 -0400[diff] [blame]71#endif