X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=rcuja%2Frcuja-internal.h;h=80202ed0f9683eacaf3d888a512406e676f05f91;hb=11c5e01644e22c2c3c372da0e93e09a8f43239ac;hp=a8402cc3faee8063e0271e45b063307788f229b0;hpb=d22c185b83a900c643c0ec6f86d65ed72f551736;p=userspace-rcu.git

diff --git a/rcuja/rcuja-internal.h b/rcuja/rcuja-internal.h
index a8402cc..80202ed 100644
--- a/rcuja/rcuja-internal.h
+++ b/rcuja/rcuja-internal.h
@@ -35,18 +35,49 @@ struct rcu_ja_node_flag;
 struct rcu_ja_shadow_node {
 	struct cds_lfht_node ht_node;	/* hash table node */
 	struct rcu_ja_node *node;	/* reverse mapping and hash table key */
-	pthread_mutex_t lock;		/* mutual exclusion on node */
+	/*
+	 * 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 */