X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=urcu%2Frculfhash.h;h=5c5d4eb1a57ad87a0b2ec8f7c10ed704efd6b66f;hb=1b81fe1a14149b4c3f878b53e050a6ad5374a569;hp=2e50beb27a5711c855a03f4689e11ae8c033e8ea;hpb=9b35f1e4c8561fd8937ab394e65cc9b230ea854d;p=urcu.git

diff --git a/urcu/rculfhash.h b/urcu/rculfhash.h
index 2e50beb..5c5d4eb 100644
--- a/urcu/rculfhash.h
+++ b/urcu/rculfhash.h
@@ -4,15 +4,21 @@
 #include <stdint.h>
 #include <urcu-call-rcu.h>
 
-struct rcu_ht_node {
-	/* cache-hot for iteration */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct _rcu_ht_node {
 	struct rcu_ht_node *next;
 	unsigned long reverse_hash;
+};
+
+struct rcu_ht_node {
+	/* cache-hot for iteration */
+	struct _rcu_ht_node p;          /* needs to be first field */
 	void *key;
 	unsigned int key_len;
-	unsigned int dummy;
 	/* cache-cold for iteration */
-	unsigned long hash;
 	struct rcu_head head;
 };
 
@@ -34,7 +40,6 @@ void ht_node_init(struct rcu_ht_node *node, void *key,
 {
 	node->key = key;
 	node->key_len = key_len;
-	node->dummy = 0;
 }
 
 /*
@@ -59,12 +64,21 @@ struct rcu_ht_node *ht_lookup(struct rcu_ht *ht, void *key, size_t key_len);
 /* Call with rcu_read_lock held. */
 void ht_add(struct rcu_ht *ht, struct rcu_ht_node *node);
 
-/* Call with rcu_read_lock held. */
-int ht_add_unique(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);
 
 void ht_resize(struct rcu_ht *ht, int growth);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _URCU_RCULFHASH_H */