- * freeing the memory reserved for old node (which can be accessed with
- * cds_lfht_iter_get_node).
+ * freeing or re-using the memory reserved for old node (which can be
+ * accessed with cds_lfht_iter_get_node).
+ * Upon success, this function issues a full memory barrier before and
+ * after its atomic commit. Upon failure, this function does not issue
+ * any memory barrier.
+ */
+extern
+int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_node *node);
+
+/*
+ * cds_lfht_is_node_deleted - query whether a node is removed from hash table.
+ *
+ * Return non-zero if the node is deleted from the hash table, 0
+ * otherwise.
+ * Node can be looked up with cds_lfht_lookup and cds_lfht_next,
+ * followed by use of cds_lfht_iter_get_node.
+ * RCU read-side lock must be held between lookup and call to this
+ * function.
+ * Call with rcu_read_lock held.
+ * Threads calling this API need to be registered RCU read-side threads.
+ * This function does not issue any memory barrier.