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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 */ |