rcuja: test duplicate node/key support

[urcu.git] / urcu / rcuhlist.h

diff --git a/urcu/rcuhlist.h b/urcu/rcuhlist.h
index 83b13632536cb15a3a398505da960f4e3417c086..06359d5b2bd95d15296132c8c260a1abae5d90e1 100644 (file)
--- a/urcu/rcuhlist.h
+++ b/urcu/rcuhlist.h
@@ -50,16 +50,40 @@ static inline void cds_hlist_del_rcu(struct cds_hlist_node *elem)
        elem->prev->next = elem->next;
 }
 
+/*
+ * Get first element from a RCU hlist. Assumes the hlist is not empty.
+ * This must be done while rcu_read_lock() is held.
+ */
+#define cds_hlist_first_rcu(ptr, type, member)                         \
+       rcu_dereference((ptr)->next)
+
+/*
+ * Get first entry from a RCU hlist. Assumes the hlist is not empty.
+ * This must be done while rcu_read_lock() is held.
+ */
+#define cds_hlist_first_entry_rcu(ptr, type, member)                   \
+       cds_hlist_entry(rcu_dereference((ptr)->next), type, member)
 
-/* Iterate through elements of the list.
+/*
+ * Iterate through nodes of the list.
+ * This must be done while rcu_read_lock() is held.
+ */
+
+#define cds_hlist_for_each_rcu(pos, head, member)                      \
+       for (pos = rcu_dereference((head)->next);                       \
+            pos != NULL;                                               \
+            pos = rcu_dereference(pos->next))
+
+/*
+ * Iterate through elements of the list.
  * This must be done while rcu_read_lock() is held.
  */
 
 #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);      \
+                    entry = cds_hlist_entry(pos, __typeof__(*entry), member);  \
             pos != NULL;                                               \
             pos = rcu_dereference(pos->next),                          \
-                    entry = cds_hlist_entry(pos, typeof(*entry), member))
+                    entry = cds_hlist_entry(pos, __typeof__(*entry), member))
 
 #endif /* _URCU_RCUHLIST_H */