rculfhash test: add options

[urcu.git] / urcu / rculfhash.h

diff --git a/urcu/rculfhash.h b/urcu/rculfhash.h
index fab7d82d77ddbcf7ce31759588e1f50b1929614d..6bb1ccf619b381e59f0f8d5098b643e569626233 100644 (file)
--- a/urcu/rculfhash.h
+++ b/urcu/rculfhash.h
@@ -5,12 +5,13 @@
 #include <urcu-call-rcu.h>
 
 struct rcu_ht_node {
+       /* cache-hot for iteration */
        struct rcu_ht_node *next;
-       void *key;
-       unsigned long hash;
        unsigned long reverse_hash;
+       void *key;
+       unsigned int key_len;
        unsigned int dummy;
-       void *value;
+       /* cache-cold for iteration */
        struct rcu_head head;
 };
 
@@ -21,13 +22,17 @@ struct rcu_ht;
  * Ensure reader and writer threads are registered as urcu readers.
  */
 
-typedef unsigned long (*ht_hash_fct)(void *hashseed, void *key);
+typedef unsigned long (*ht_hash_fct)(void *key, size_t length,
+                                    unsigned long seed);
+typedef unsigned long (*ht_compare_fct)(void *key1, size_t key1_len,
+                                       void *key2, size_t key2_len);
 
 static inline
-void ht_node_init(struct rcu_ht_node *node, void *key, void *value)
+void ht_node_init(struct rcu_ht_node *node, void *key,
+                 size_t key_len)
 {
        node->key = key;
-       node->value = value;
+       node->key_len = key_len;
        node->dummy = 0;
 }
 
@@ -35,18 +40,31 @@ void ht_node_init(struct rcu_ht_node *node, void *key, void *value)
  * init_size must be power of two.
  */
 struct rcu_ht *ht_new(ht_hash_fct hash_fct,
-                     void *hashseed,
+                     ht_compare_fct compare_fct,
+                     unsigned long hash_seed,
                      unsigned long init_size,
                      void (*ht_call_rcu)(struct rcu_head *head,
                                void (*func)(struct rcu_head *head)));
 
 int ht_destroy(struct rcu_ht *ht);
+/* Count the number of nodes in the hash table. Call with rcu_read_lock held. */
+void ht_count_nodes(struct rcu_ht *ht,
+               unsigned long *count,
+               unsigned long *removed);
 
 /* Call with rcu_read_lock held. */
-struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key);
+struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len);
 
 /* Call with rcu_read_lock held. */
-int ht_add(struct rcu_ht *ht, struct rcu_ht_node *node);
+void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node);
+
+/*
+ * Call with rcu_read_lock held.
+ * Returns the node added upon success.
+ * Returns the unique node already present upon failure. If ht_add_unique fails,
+ * the node passed as parameter should be freed by the caller.
+ */
+struct rcu_ht_node *ht_add_unique(struct rcu_ht *ht, struct rcu_ht_node *node);
 
 /* Call with rcu_read_lock held. */
 int ht_remove(struct rcu_ht *ht, struct rcu_ht_node *node);