X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=rcuja%2Frcuja-internal.h;h=80202ed0f9683eacaf3d888a512406e676f05f91;hb=e1db2db589f05c48ae9e8b0199989d76bb2f7b14;hp=c03045103484cc4b505b076273ac8901b4524de8;hpb=511b4dcca9e6b2ed4c71f3e19a60c4db8e4ba064;p=userspace-rcu.git

diff --git a/rcuja/rcuja-internal.h b/rcuja/rcuja-internal.h
index c030451..80202ed 100644
--- a/rcuja/rcuja-internal.h
+++ b/rcuja/rcuja-internal.h
@@ -33,18 +33,51 @@ struct rcu_ja_node_flag;
  * Shadow node contains mutex and call_rcu head associated with a node.
  */
 struct rcu_ja_shadow_node {
-	pthread_mutex_t lock;	/* mutual exclusion on node */
-	struct rcu_head head;	/* for deferred node and shadow node reclaim */
+	struct cds_lfht_node ht_node;	/* hash table node */
+	struct rcu_ja_node *node;	/* reverse mapping and hash table key */
+	/*
+	 * mutual exclusion on all nodes belonging to the same tree
+	 * position (e.g. both nodes before and after recompaction
+	 * use the same lock).
+	 */
+	pthread_mutex_t *lock;
+	unsigned int nr_child;		/* number of children in node */
+	struct rcu_head head;		/* for deferred node and shadow node reclaim */
 };
 
 struct rcu_ja {
 	struct rcu_ja_node_flag *root;
 	/*
-	 * We use a hash table to associate nodes to their respective
-	 * shadow node. This helps reducing lookup hot path cache
-	 * footprint, especially for very small nodes.
+	 * We use a hash table to associate node keys to their
+	 * respective shadow node. This helps reducing lookup hot path
+	 * cache footprint, especially for very small nodes.
 	 */
 	struct cds_lfht *ht;
 };
 
+__attribute__((visibility("protected")))
+struct rcu_ja_shadow_node *rcuja_shadow_lookup_lock(struct cds_lfht *ht,
+		struct rcu_ja_node *node);
+__attribute__((visibility("protected")))
+void rcuja_shadow_unlock(struct rcu_ja_shadow_node *shadow_node);
+__attribute__((visibility("protected")))
+int rcuja_shadow_set(struct cds_lfht *ht,
+		struct rcu_ja_node *new_node,
+		struct rcu_ja_shadow_node *inherit_from);
+__attribute__((visibility("protected")))
+
+/* rcuja_shadow_clear flags */
+enum {
+	RCUJA_SHADOW_CLEAR_FREE_NODE = (1U << 0),
+	RCUJA_SHADOW_CLEAR_FREE_LOCK = (1U << 1),
+};
+
+int rcuja_shadow_clear(struct cds_lfht *ht,
+		struct rcu_ja_node *node,
+		unsigned int flags);
+__attribute__((visibility("protected")))
+struct cds_lfht *rcuja_create_ht(const struct rcu_flavor_struct *flavor);
+__attribute__((visibility("protected")))
+void rcuja_delete_ht(struct cds_lfht *ht);
+
 #endif /* _URCU_RCUJA_INTERNAL_H */