projects / userspace-rcu.git / blame
| Commit | Line | Data |
|---|---|---|
| a00718e7 MD |
1 | /* |
| 2 | * Copyright (C) 2002 Free Software Foundation, Inc. | |
| 3 | * (originally part of the GNU C Library) | |
| 4 | * Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
| 5 | * | |
| 6 | * Copyright (C) 2009 Pierre-Marc Fournier | |
| 7 | * Conversion to RCU list. | |
| 8 | * Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 9 | * | |
| 10 | * This library is free software; you can redistribute it and/or | |
| 11 | * modify it under the terms of the GNU Lesser General Public | |
| 12 | * License as published by the Free Software Foundation; either | |
| 13 | * version 2.1 of the License, or (at your option) any later version. | |
| 14 | * | |
| 15 | * This library is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 | * Lesser General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU Lesser General Public | |
| 21 | * License along with this library; if not, write to the Free Software | |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 23 | */ | |
| 5db941e8 MD |
24 | |
| 25 | #ifndef _URCU_RCUHLIST_H | |
| 26 | #define _URCU_RCUHLIST_H | |
| 27 | ||
| 28 | #include <urcu/hlist.h> | |
| 29 | #include <urcu/arch.h> | |
| 30 | #include <urcu-pointer.h> | |
| 31 | ||
| 32 | /* Add new element at the head of the list. | |
| 33 | */ | |
| 16aa9ee8 DG |
34 | static inline void cds_hlist_add_head_rcu(struct cds_hlist_node *newp, |
| 35 | struct cds_hlist_head *head) | |
| 5db941e8 MD |
36 | { |
| 37 | newp->next = head->next; | |
| 16aa9ee8 | 38 | newp->prev = (struct cds_hlist_node *)head; |
| 5481ddb3 | 39 | cmm_smp_wmb(); |
| 5db941e8 MD |
40 | if (head->next) |
| 41 | head->next->prev = newp; | |
| 42 | head->next = newp; | |
| 43 | } | |
| 44 | ||
| 45 | /* Remove element from list. */ | |
| 16aa9ee8 | 46 | static inline void cds_hlist_del_rcu(struct cds_hlist_node *elem) |
| 5db941e8 MD |
47 | { |
| 48 | if (elem->next) | |
| 49 | elem->next->prev = elem->prev; | |
| 50 | elem->prev->next = elem->next; | |
| 51 | } | |
| 52 | ||
| 53 | ||
| 54 | /* Iterate through elements of the list. | |
| 55 | * This must be done while rcu_read_lock() is held. | |
| 56 | */ | |
| 57 | ||
| 16aa9ee8 | 58 | #define cds_hlist_for_each_entry_rcu(entry, pos, head, member) \ |
| 5db941e8 | 59 | for (pos = rcu_dereference((head)->next), \ |
| bdffa73a | 60 | entry = cds_hlist_entry(pos, __typeof__(*entry), member); \ |
| 5db941e8 MD |
61 | pos != NULL; \ |
| 62 | pos = rcu_dereference(pos->next), \ | |
| bdffa73a | 63 | entry = cds_hlist_entry(pos, __typeof__(*entry), member)) |
| 5db941e8 MD |
64 | |
| 65 | #endif /* _URCU_RCUHLIST_H */ |