X-Git-Url: http://git.tuebingen.mpg.de/?p=osl.git;a=blobdiff_plain;f=rbtree.h;h=109dd856c1c99aa450fb05abb5e5f32f1eb3df06;hp=38b7752b245c5a44f603eceb74e75e60eaf5dded;hb=23dc00453efa7eb5a19036a4c90ca409225189cb;hpb=5952112a37ecdaedf3b76e08f97d307f1056c512

diff --git a/rbtree.h b/rbtree.h
index 38b7752..109dd85 100644
--- a/rbtree.h
+++ b/rbtree.h
@@ -147,12 +147,12 @@ extern void rb_insert_color(struct rb_node *, struct rb_root *);
 extern void rb_erase(struct rb_node *, struct rb_root *);
 
 /* Find logical next and previous nodes in a tree */
-extern struct rb_node *rb_next(struct rb_node *);
-extern struct rb_node *rb_prev(struct rb_node *);
-extern struct rb_node *rb_first(struct rb_root *);
-extern struct rb_node *rb_last(struct rb_root *);
-extern struct rb_node *rb_nth(struct rb_node *node, unsigned n);
-extern int rb_rank(struct rb_node *node, unsigned *rank);
+extern struct rb_node *rb_next(const struct rb_node *);
+extern struct rb_node *rb_prev(const struct rb_node *);
+extern struct rb_node *rb_first(const struct rb_root *);
+extern struct rb_node *rb_last(const struct rb_root *);
+extern struct rb_node *rb_nth(const struct rb_node *node, unsigned n);
+extern int rb_rank(const struct rb_node *node, unsigned *rank);
 
 /* Fast replacement of a single node without remove/rebalance/add/rebalance */
 extern void rb_replace_node(struct rb_node *victim, struct rb_node *new,