btrfs-progs/rbtree-utils.h

46 lines
1.5 KiB
C

/*
* Copyright (C) 2014 Facebook. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef __RBTREE_UTILS__
#define __RBTREE_UTILS__
#include "rbtree.h"
/* The common insert/search/free functions */
typedef int (*rb_compare_nodes)(struct rb_node *node1, struct rb_node *node2);
typedef int (*rb_compare_keys)(struct rb_node *node, void *key);
typedef void (*rb_free_node)(struct rb_node *node);
int rb_insert(struct rb_root *root, struct rb_node *node,
rb_compare_nodes comp);
/*
* In some cases, we need return the next node if we don't find the node we
* specify. At this time, we can use next_ret.
*/
struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp,
struct rb_node **next_ret);
void rb_free_nodes(struct rb_root *root, rb_free_node free_node);
#define FREE_RB_BASED_TREE(name, free_func) \
static void free_##name##_tree(struct rb_root *root) \
{ \
rb_free_nodes(root, free_func); \
}
#endif