projects / urcu.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | */ | |
| a45fb1ff MD |
33 | static inline void hlist_add_head_rcu(struct hlist_node *newp, |
| 34 | struct hlist_head *head) | |
| 5db941e8 MD |
35 | { |
| 36 | newp->next = head->next; | |
| 37 | newp->prev = (struct 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. */ | |
| 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 */ |