+/* Copyright (C) 2002 Free Software Foundation, Inc.
+ This file is 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
+
+ The GNU C 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.
+
+ The GNU C 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 the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 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 hlist_add_head(struct hlist_node *newp,
+ struct hlist_head *head)
+{
+ newp->next = head->next;
+ newp->prev = (struct hlist_node *)head;
+ smp_wmb();
+ if (head->next)
+ head->next->prev = newp;
+ head->next = newp;
+}
+
+/* Remove element from list. */
+static inline void hlist_del_rcu(struct hlist_node *elem)
+{
+ if (elem->next)
+ elem->next->prev = elem->prev;
+ elem->prev->next = elem->next;
+}
+
+
+/* Iterate through elements of the list.
+ * This must be done while rcu_read_lock() is held.
+ */
+
+#define hlist_for_each_entry_rcu(entry, pos, head, member) \
+ for (pos = rcu_dereference((head)->next), \
+ entry = hlist_entry(pos, typeof(*entry), member); \
+ pos != NULL; \
+ pos = rcu_dereference(pos->next), \
+ entry = hlist_entry(pos, typeof(*entry), member))
+
+#endif /* _URCU_RCUHLIST_H */