/usr/include/urcu/rcuhlist.h is in liburcu-dev 0.9.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | /*
* Copyright (C) 2002 Free Software Foundation, Inc.
* (originally part of the GNU C Library)
* Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
*
* Copyright (C) 2009 Pierre-Marc Fournier
* Conversion to RCU list.
* Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _URCU_RCUHLIST_H
#define _URCU_RCUHLIST_H
#include <urcu/hlist.h>
#include <urcu/arch.h>
#include <urcu-pointer.h>
/* Add new element at the head of the list. */
static inline
void cds_hlist_add_head_rcu(struct cds_hlist_node *newp,
struct cds_hlist_head *head)
{
newp->next = head->next;
newp->prev = (struct cds_hlist_node *)head;
if (head->next)
head->next->prev = newp;
rcu_assign_pointer(head->next, newp);
}
/* Remove element from list. */
static inline
void cds_hlist_del_rcu(struct cds_hlist_node *elem)
{
if (elem->next)
elem->next->prev = elem->prev;
CMM_STORE_SHARED(elem->prev->next, elem->next);
}
/*
* Iterate through elements of the list.
* This must be done while rcu_read_lock() is held.
*/
#define cds_hlist_for_each_rcu(pos, head) \
for (pos = rcu_dereference((head)->next); pos != NULL; \
pos = rcu_dereference(pos->next))
/*
* cds_hlist_for_each_entry_rcu takes 4 arguments, while the Linux
* kernel API only takes 3.
* We implement cds_hlist_for_each_entry_rcu_2() to follow the Linux
* kernel APIs.
*/
#define cds_hlist_for_each_entry_rcu(entry, pos, head, member) \
for (pos = rcu_dereference((head)->next), \
entry = cds_hlist_entry(pos, __typeof__(*entry), member); \
pos != NULL; \
pos = rcu_dereference(pos->next), \
entry = cds_hlist_entry(pos, __typeof__(*entry), member))
#define cds_hlist_for_each_entry_rcu_2(entry, head, member) \
for (entry = cds_hlist_entry(rcu_dereference((head)->next), \
__typeof__(*entry), member); \
&entry->member != NULL; \
entry = cds_hlist_entry(rcu_dereference(entry->member.next), \
__typeof__(*entry), member))
#endif /* _URCU_RCUHLIST_H */
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