tests: update writer cs len script for 64-core ppc
[urcu.git] / urcu / hlist.h
CommitLineData
63ff4873
MD
1#ifndef _KCOMPAT_HLIST_H
2#define _KCOMPAT_HLIST_H
3
4/*
5 * Kernel sourcecode compatible lightweight single pointer list head useful
6 * for implementing hash tables
7 *
8 * Copyright (C) 2009 Novell Inc.
9 *
10 * Author: Jan Blunck <jblunck@suse.de>
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU Lesser General Public License version 2.1 as
14 * published by the Free Software Foundation.
15 */
16
17struct hlist_head
18{
19 struct hlist_node *next;
20};
21
22struct hlist_node
23{
24 struct hlist_node *next;
25 struct hlist_node *prev;
26};
27
28/* Initialize a new list head. */
29static inline void INIT_HLIST_HEAD(struct hlist_head *ptr)
30{
31 ptr->next = NULL;
32}
33
34/* Get typed element from list at a given position. */
35#define hlist_entry(ptr, type, member) \
36 ((type *) ((char *) (ptr) - (unsigned long) (&((type *) 0)->member)))
37
38/* Add new element at the head of the list. */
39static inline void hlist_add_head (struct hlist_node *newp,
40 struct hlist_head *head)
41{
42 if (head->next)
43 head->next->prev = newp;
44
45 newp->next = head->next;
46 newp->prev = (struct hlist_node *)head;
47 head->next = newp;
48}
49
50/* Remove element from list. */
51static inline void hlist_del (struct hlist_node *elem)
52{
53 if (elem->next)
54 elem->next->prev = elem->prev;
55
56 elem->prev->next = elem->next;
57}
58
59#define hlist_for_each_entry(entry, pos, head, member) \
60 for (pos = (head)->next, \
61 entry = hlist_entry(pos, typeof(*entry), member); \
62 pos != NULL; \
63 pos = pos->next, \
64 entry = hlist_entry(pos, typeof(*entry), member))
65
66#define hlist_for_each_entry_safe(entry, pos, p, head, member) \
67 for (pos = (head)->next, \
68 entry = hlist_entry(pos, typeof(*entry), member); \
69 (pos != NULL) && ({ p = pos->next; 1;}); \
70 pos = p, \
71 entry = hlist_entry(pos, typeof(*entry), member))
72
73#endif /* _KCOMPAT_HLIST_H */
This page took 0.024698 seconds and 4 git commands to generate.