rcuhlist: add head name fix
[urcu.git] / urcu / rcuhlist.h
1 /* Copyright (C) 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 Copyright (C) 2009 Pierre-Marc Fournier
6 Conversion to RCU list.
7 Copyright (C) 2010 Mathieu Desnoyers
8
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 The GNU C Library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with the GNU C Library; if not, write to the Free
21 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 02111-1307 USA. */
23
24 #ifndef _URCU_RCUHLIST_H
25 #define _URCU_RCUHLIST_H
26
27 #include <urcu/hlist.h>
28 #include <urcu/arch.h>
29 #include <urcu-pointer.h>
30
31 /* Add new element at the head of the list.
32 */
33 static inline void hlist_add_head_rcu(struct hlist_node *newp,
34 struct hlist_head *head)
35 {
36 newp->next = head->next;
37 newp->prev = (struct hlist_node *)head;
38 smp_wmb();
39 if (head->next)
40 head->next->prev = newp;
41 head->next = newp;
42 }
43
44 /* Remove element from list. */
45 static inline void hlist_del_rcu(struct hlist_node *elem)
46 {
47 if (elem->next)
48 elem->next->prev = elem->prev;
49 elem->prev->next = elem->next;
50 }
51
52
53 /* Iterate through elements of the list.
54 * This must be done while rcu_read_lock() is held.
55 */
56
57 #define hlist_for_each_entry_rcu(entry, pos, head, member) \
58 for (pos = rcu_dereference((head)->next), \
59 entry = hlist_entry(pos, typeof(*entry), member); \
60 pos != NULL; \
61 pos = rcu_dereference(pos->next), \
62 entry = hlist_entry(pos, typeof(*entry), member))
63
64 #endif /* _URCU_RCUHLIST_H */
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