/* $NetBSD: rbtree.h,v 1.6 2021/12/19 01:44:26 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_RBTREE_H_
#define _LINUX_RBTREE_H_
#include <sys/rbtree.h>
struct rb_root {
struct rb_tree rbr_tree;
};
struct rb_root_cached {
struct rb_root rbrc_root;
};
static inline bool
RB_EMPTY_ROOT(struct rb_root *root)
{
return RB_TREE_MIN(&root->rbr_tree) == NULL;
}
static inline void
rb_erase(struct rb_node *rbnode, struct rb_root *root)
{
struct rb_tree *tree = &root->rbr_tree;
void *node = (char *)rbnode - tree->rbt_ops->rbto_node_offset;
rb_tree_remove_node(tree, node);
}
static inline void
rb_erase_cached(struct rb_node *rbnode, struct rb_root_cached *root)
{
rb_erase(rbnode, &root->rbrc_root);
}
#endif /* _LINUX_RBTREE_H_ */