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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * Copyright (C) 2001 Momchil Velikov |
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| 3 | * Portions Copyright (C) 2001 Christoph Hellwig |
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| 4 | * |
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| 5 | * This program is free software; you can redistribute it and/or |
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| 6 | * modify it under the terms of the GNU General Public License as |
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| 7 | * published by the Free Software Foundation; either version 2, or (at |
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| 8 | * your option) any later version. |
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| 9 | * |
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| 10 | * This program is distributed in the hope that it will be useful, but |
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| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | * General Public License for more details. |
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| 14 | * |
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| 15 | * You should have received a copy of the GNU General Public License |
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| 16 | * along with this program; if not, write to the Free Software |
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| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 18 | */ |
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| 19 | #ifndef _LINUX_RADIX_TREE_H |
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| 20 | #define _LINUX_RADIX_TREE_H |
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| 21 | |||
| 22 | #include <linux/preempt.h> |
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| 23 | |||
| 24 | struct radix_tree_node; |
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| 25 | |||
| 26 | struct radix_tree_root { |
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| 27 | unsigned int height; |
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| 28 | int gfp_mask; |
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| 29 | struct radix_tree_node *rnode; |
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| 30 | }; |
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| 31 | |||
| 32 | #define RADIX_TREE_INIT(mask) {0, (mask), NULL} |
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| 33 | |||
| 34 | #define RADIX_TREE(name, mask) \ |
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| 35 | struct radix_tree_root name = RADIX_TREE_INIT(mask) |
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| 36 | |||
| 37 | #define INIT_RADIX_TREE(root, mask) \ |
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| 38 | do { \ |
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| 39 | (root)->height = 0; \ |
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| 40 | (root)->gfp_mask = (mask); \ |
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| 41 | (root)->rnode = NULL; \ |
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| 42 | } while (0) |
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| 43 | |||
| 44 | extern int radix_tree_insert(struct radix_tree_root *, unsigned long, void *); |
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| 45 | extern void *radix_tree_lookup(struct radix_tree_root *, unsigned long); |
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| 46 | extern void *radix_tree_delete(struct radix_tree_root *, unsigned long); |
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| 47 | extern unsigned int |
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| 48 | radix_tree_gang_lookup(struct radix_tree_root *root, void **results, |
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| 49 | unsigned long first_index, unsigned int max_items); |
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| 50 | int radix_tree_preload(int gfp_mask); |
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| 51 | |||
| 52 | static inline void radix_tree_preload_end(void) |
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| 53 | { |
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| 54 | preempt_enable(); |
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| 55 | } |
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| 56 | |||
| 57 | #endif /* _LINUX_RADIX_TREE_H */ |