diff options
Diffstat (limited to 'libc/kernel/common/linux/rbtree.h')
-rw-r--r-- | libc/kernel/common/linux/rbtree.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libc/kernel/common/linux/rbtree.h b/libc/kernel/common/linux/rbtree.h new file mode 100644 index 0000000..714ffe9 --- /dev/null +++ b/libc/kernel/common/linux/rbtree.h @@ -0,0 +1,45 @@ +/**************************************************************************** + **************************************************************************** + *** + *** This header was automatically generated from a Linux kernel header + *** of the same name, to make information necessary for userspace to + *** call into the kernel available to libc. It contains only constants, + *** structures, and macros generated from the original header, and thus, + *** contains no copyrightable information. + *** + **************************************************************************** + ****************************************************************************/ +#ifndef _LINUX_RBTREE_H +#define _LINUX_RBTREE_H + +#include <linux/kernel.h> +#include <linux/stddef.h> + +struct rb_node +{ + unsigned long rb_parent_color; +#define RB_RED 0 +#define RB_BLACK 1 + struct rb_node *rb_right; + struct rb_node *rb_left; +} __attribute__((aligned(sizeof(long)))); + +struct rb_root +{ + struct rb_node *rb_node; +}; + +#define rb_parent(r) ((struct rb_node *)((r)->rb_parent_color & ~3)) +#define rb_color(r) ((r)->rb_parent_color & 1) +#define rb_is_red(r) (!rb_color(r)) +#define rb_is_black(r) rb_color(r) +#define rb_set_red(r) do { (r)->rb_parent_color &= ~1; } while (0) +#define rb_set_black(r) do { (r)->rb_parent_color |= 1; } while (0) + +#define RB_ROOT (struct rb_root) { NULL, } +#define rb_entry(ptr, type, member) container_of(ptr, type, member) +#define RB_EMPTY_ROOT(root) ((root)->rb_node == NULL) +#define RB_EMPTY_NODE(node) (rb_parent(node) != node) +#define RB_CLEAR_NODE(node) (rb_set_parent(node, node)) + +#endif |