* cds_lfht_replace - replace a node pointer to by iter within hash table.
* @ht: the hash table.
* @old_iter: the iterator position of the node to replace.
- * @now_node: the new node to try using for replacement.
+ * @hash: the node's hash.
+ * @match: the key match function.
+ * @key: the node's key.
+ * @new_node: the new node to use as replacement.
*
* Return 0 if replacement is successful, negative value otherwise.
- * Replacing a NULL old node or an already removed node will fail with a
- * negative value.
+ * Replacing a NULL old node or an already removed node will fail with
+ * -ENOENT.
+ * If the hash or value of the node to replace and the new node differ,
+ * this function returns -EINVAL without proceeding to the replacement.
* Old node can be looked up with cds_lfht_lookup and cds_lfht_next.
* RCU read-side lock must be held between lookup and replacement.
* Call with rcu_read_lock held.
* guarantee that a combination of add_replace and add_unique updates
* will never generate duplicated keys.
*/
-int cds_lfht_replace(struct cds_lfht *ht, struct cds_lfht_iter *old_iter,
+int cds_lfht_replace(struct cds_lfht *ht,
+ struct cds_lfht_iter *old_iter,
+ unsigned long hash,
+ cds_lfht_match_fct match,
+ const void *key,
struct cds_lfht_node *new_node);
/*
*/
int cds_lfht_del(struct cds_lfht *ht, struct cds_lfht_node *node);
+/*
+ * cds_lfht_is_node_deleted - query if 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.
+ */
+int cds_lfht_is_node_deleted(struct cds_lfht_node *node);
+
/*
* cds_lfht_resize - Force a hash table resize
* @ht: the hash table.