Fix: tests: invoke destroy APIs for queues/stacks
[urcu.git] / urcu / rcuhlist.h
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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 */
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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
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32/* Add new element at the head of the list. */
33static inline
34void cds_hlist_add_head_rcu(struct cds_hlist_node *newp,
35 struct cds_hlist_head *head)
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36{
37 newp->next = head->next;
16aa9ee8 38 newp->prev = (struct cds_hlist_node *)head;
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39 if (head->next)
40 head->next->prev = newp;
90bdf188 41 rcu_assign_pointer(head->next, newp);
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42}
43
44/* Remove element from list. */
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45static inline
46void cds_hlist_del_rcu(struct cds_hlist_node *elem)
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47{
48 if (elem->next)
49 elem->next->prev = elem->prev;
90bdf188 50 CMM_STORE_SHARED(elem->prev->next, elem->next);
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51}
52
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53/*
54 * Iterate through elements of the list.
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55 * This must be done while rcu_read_lock() is held.
56 */
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57#define cds_hlist_for_each_rcu(pos, head) \
58 for (pos = rcu_dereference((head)->next); pos != NULL; \
59 pos = rcu_dereference(pos->next))
60
61/*
62 * cds_hlist_for_each_entry_rcu takes 4 arguments, while the Linux
63 * kernel API only takes 3.
64 * We implement cds_hlist_for_each_entry_rcu_2() to follow the Linux
65 * kernel APIs.
66 */
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67#define cds_hlist_for_each_entry_rcu(entry, pos, head, member) \
68 for (pos = rcu_dereference((head)->next), \
69 entry = cds_hlist_entry(pos, __typeof__(*entry), member); \
70 pos != NULL; \
71 pos = rcu_dereference(pos->next), \
72 entry = cds_hlist_entry(pos, __typeof__(*entry), member))
5db941e8 73
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74#define cds_hlist_for_each_entry_rcu_2(entry, head, member) \
75 for (entry = cds_hlist_entry(rcu_dereference((head)->next), \
76 __typeof__(*entry), member); \
77 &entry->member != NULL; \
78 entry = cds_hlist_entry(rcu_dereference(entry->member.next), \
79 __typeof__(*entry), member))
80
5db941e8 81#endif /* _URCU_RCUHLIST_H */
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