Commit 7fe1e133 authored by David Woodhouse's avatar David Woodhouse

[RBTREE] Add accessor macros for colour and parent fields of rb_node

This is in preparation for merging those fields into a single
'unsigned long', because using a whole machine-word for a single bit
of colour information is wasteful.
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent f4ffaa45
...@@ -107,6 +107,15 @@ struct rb_node ...@@ -107,6 +107,15 @@ struct rb_node
struct rb_node *rb_left; struct rb_node *rb_left;
}; };
#define rb_parent(r) ((r)->rb_parent)
#define rb_set_parent(r,p) do { (r)->rb_parent = p; } while (0)
#define rb_colour(r) ((r)->rb_colour)
#define rb_is_red(r) ((r)->colour == RB_RED)
#define rb_is_black(r) ((r)->colour == RB_BLACK)
#define rb_set_red(r) do { (r)->colour = RB_RED; } while (0)
#define rb_set_black(r) do { (r)->colour = RB_BLACK; } while (0)
#define rb_set_colour(r,c) do { (r)->colour = (c); } while (0)
struct rb_root struct rb_root
{ {
struct rb_node *rb_node; struct rb_node *rb_node;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment