Copyright (C) 2009 Pierre-Marc Fournier
Conversion to RCU list.
+ Copyright (C) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
/* Add new element at the head of the list.
*/
-static inline void list_add_rcu(list_t *newp, list_t *head)
+static inline void cds_list_add_rcu(struct cds_list_head *newp, struct cds_list_head *head)
{
newp->next = head->next;
newp->prev = head;
- smp_wmb();
+ cmm_smp_wmb();
head->next->prev = newp;
head->next = newp;
}
+/* replace an old entry atomically.
+ */
+static inline void cds_list_replace_rcu(struct cds_list_head *old, struct cds_list_head *_new)
+{
+ _new->next = old->next;
+ _new->prev = old->prev;
+ rcu_assign_pointer(_new->prev->next, _new);
+ _new->next->prev = _new;
+}
/* Remove element from list. */
-static inline void list_del_rcu(list_t *elem)
+static inline void cds_list_del_rcu(struct cds_list_head *elem)
{
elem->next->prev = elem->prev;
elem->prev->next = elem->next;
}
+/*
+ * Iteration through all elements of the list must be done while rcu_read_lock()
+ * is held.
+ */
+
+/* Iterate forward over the elements of the list. */
+#define cds_list_for_each_rcu(pos, head) \
+ for (pos = rcu_dereference((head)->next); pos != (head); \
+ pos = rcu_dereference(pos->next))
+
/* Iterate through elements of the list.
- * This must be done while rcu_read_lock() is held.
*/
-
-#define list_for_each_entry_rcu(pos, head, member) \
- for (pos = list_entry(rcu_dereference((head)->next), typeof(*pos), member); \
+#define cds_list_for_each_entry_rcu(pos, head, member) \
+ for (pos = cds_list_entry(rcu_dereference((head)->next), typeof(*pos), member); \
&pos->member != (head); \
- pos = list_entry(rcu_dereference(pos->member.next), typeof(*pos), member))
+ pos = cds_list_entry(rcu_dereference(pos->member.next), typeof(*pos), member))
#endif /* _URCU_RCULIST_H */