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5db941e8 MD |
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 | */ | |
16aa9ee8 DG |
33 | static inline void cds_hlist_add_head_rcu(struct cds_hlist_node *newp, |
34 | struct cds_hlist_head *head) | |
5db941e8 MD |
35 | { |
36 | newp->next = head->next; | |
16aa9ee8 | 37 | newp->prev = (struct cds_hlist_node *)head; |
5481ddb3 | 38 | cmm_smp_wmb(); |
5db941e8 MD |
39 | if (head->next) |
40 | head->next->prev = newp; | |
41 | head->next = newp; | |
42 | } | |
43 | ||
44 | /* Remove element from list. */ | |
16aa9ee8 | 45 | static inline void cds_hlist_del_rcu(struct cds_hlist_node *elem) |
5db941e8 MD |
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 | ||
16aa9ee8 | 57 | #define cds_hlist_for_each_entry_rcu(entry, pos, head, member) \ |
5db941e8 | 58 | for (pos = rcu_dereference((head)->next), \ |
16aa9ee8 | 59 | entry = cds_hlist_entry(pos, typeof(*entry), member); \ |
5db941e8 MD |
60 | pos != NULL; \ |
61 | pos = rcu_dereference(pos->next), \ | |
16aa9ee8 | 62 | entry = cds_hlist_entry(pos, typeof(*entry), member)) |
5db941e8 MD |
63 | |
64 | #endif /* _URCU_RCUHLIST_H */ |