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bc621e545b
This is needed for incoming extent-cache infrastructure. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Marek Behún <marek.behun@nic.cz>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/*
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* Copyright (C) 2014 Facebook. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __RBTREE_UTILS__
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#define __RBTREE_UTILS__
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#include <linux/rbtree.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* The common insert/search/free functions */
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typedef int (*rb_compare_nodes)(struct rb_node *node1, struct rb_node *node2);
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typedef int (*rb_compare_keys)(struct rb_node *node, void *key);
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typedef void (*rb_free_node)(struct rb_node *node);
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int rb_insert(struct rb_root *root, struct rb_node *node,
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rb_compare_nodes comp);
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/*
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* In some cases, we need return the next node if we don't find the node we
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* specify. At this time, we can use next_ret.
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*/
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struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp,
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struct rb_node **next_ret);
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void rb_free_nodes(struct rb_root *root, rb_free_node free_node);
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#define FREE_RB_BASED_TREE(name, free_func) \
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static void free_##name##_tree(struct rb_root *root) \
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{ \
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rb_free_nodes(root, free_func); \
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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