| Qu Wenruo | bc621e5 | 2020-06-24 18:02:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Facebook. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef __RBTREE_UTILS__ |
| 20 | #define __RBTREE_UTILS__ |
| 21 | |
| 22 | #include <linux/rbtree.h> |
| 23 | |
| 24 | #ifdef __cplusplus |
| 25 | extern "C" { |
| 26 | #endif |
| 27 | |
| 28 | /* The common insert/search/free functions */ |
| 29 | typedef int (*rb_compare_nodes)(struct rb_node *node1, struct rb_node *node2); |
| 30 | typedef int (*rb_compare_keys)(struct rb_node *node, void *key); |
| 31 | typedef void (*rb_free_node)(struct rb_node *node); |
| 32 | |
| 33 | int rb_insert(struct rb_root *root, struct rb_node *node, |
| 34 | rb_compare_nodes comp); |
| 35 | /* |
| 36 | * In some cases, we need return the next node if we don't find the node we |
| 37 | * specify. At this time, we can use next_ret. |
| 38 | */ |
| 39 | struct rb_node *rb_search(struct rb_root *root, void *key, rb_compare_keys comp, |
| 40 | struct rb_node **next_ret); |
| 41 | void rb_free_nodes(struct rb_root *root, rb_free_node free_node); |
| 42 | |
| 43 | #define FREE_RB_BASED_TREE(name, free_func) \ |
| 44 | static void free_##name##_tree(struct rb_root *root) \ |
| 45 | { \ |
| 46 | rb_free_nodes(root, free_func); \ |
| 47 | } |
| 48 | |
| 49 | #ifdef __cplusplus |
| 50 | } |
| 51 | #endif |
| 52 | |
| 53 | #endif |