On Thu, 2012-08-02 at 15:34 -0700, Michel Lespinasse wrote:
> +static void augment_propagate(struct rb_node *rb, struct rb_node *stop)
> +{
> + while (rb != stop) {
> + struct interval_tree_node *node =
> + rb_entry(rb, struct interval_tree_node, rb);
> + unsigned long subtree_last = compute_subtree_last(node);
> + if (node->__subtree_last == subtree_last)
> + break;
> + node->__subtree_last = subtree_last;
> + rb = rb_parent(&node->rb);
> + }
> +}
> +
> +static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new)
> +{
> + struct interval_tree_node *old =
> + rb_entry(rb_old, struct interval_tree_node, rb);
> + struct interval_tree_node *new =
> + rb_entry(rb_new, struct interval_tree_node, rb);
> +
> + new->__subtree_last = old->__subtree_last;
> +}
> +
> +static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new)
> +{
> + struct interval_tree_node *old =
> + rb_entry(rb_old, struct interval_tree_node, rb);
> + struct interval_tree_node *new =
> + rb_entry(rb_new, struct interval_tree_node, rb);
> +
> + new->__subtree_last = old->__subtree_last;
> + old->__subtree_last = compute_subtree_last(old);
> +}
I still don't get why we need the 3 callbacks when both propagate and
rotate are simple variants of the original callback
(compute_subtree_last, in this instance).
Why would every user need to replicate the propagate and rotate
boilerplate?
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