From cdb9e22e292275237cbd93b9c4326382daff70f1 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Fri, 10 Oct 2014 16:57:08 -0400 Subject: Btrfs-progs: break out rbtree util functions These were added to deal with duplicated functionality within btrfs-progs, but we specifically copied rbtree.c from the kernel, so move these functions out into their own file. This will make it easier to keep rbtree.c in sync. Thanks, Signed-off-by: Josef Bacik Signed-off-by: David Sterba --- rbtree-utils.h | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 rbtree-utils.h (limited to 'rbtree-utils.h') diff --git a/rbtree-utils.h b/rbtree-utils.h new file mode 100644 index 00000000..7298c72e --- /dev/null +++ b/rbtree-utils.h @@ -0,0 +1,45 @@ +/* + * 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 -- cgit v1.2.3