projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Copyright (C) 2001 Momchil Velikov | |
| 3 | * Portions Copyright (C) 2001 Christoph Hellwig | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 7 | * published by the Free Software Foundation; either version 2, or (at | |
| 8 | * your option) any later version. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, but | |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | * General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 18 | */ | |
| 19 | #ifndef _LINUX_RADIX_TREE_H | |
| 20 | #define _LINUX_RADIX_TREE_H | |
| 21 | ||
| 095975da | 22 | #include <linux/sched.h> |
| 1da177e4 LT |
23 | #include <linux/preempt.h> |
| 24 | #include <linux/types.h> | |
| 25 | ||
| 26 | struct radix_tree_root { | |
| 27 | unsigned int height; | |
| fd4f2df2 | 28 | gfp_t gfp_mask; |
| 1da177e4 LT |
29 | struct radix_tree_node *rnode; |
| 30 | }; | |
| 31 | ||
| 32 | #define RADIX_TREE_INIT(mask) { \ | |
| 33 | .height = 0, \ | |
| 34 | .gfp_mask = (mask), \ | |
| 35 | .rnode = NULL, \ | |
| 36 | } | |
| 37 | ||
| 38 | #define RADIX_TREE(name, mask) \ | |
| 39 | struct radix_tree_root name = RADIX_TREE_INIT(mask) | |
| 40 | ||
| 41 | #define INIT_RADIX_TREE(root, mask) \ | |
| 42 | do { \ | |
| 43 | (root)->height = 0; \ | |
| 44 | (root)->gfp_mask = (mask); \ | |
| 45 | (root)->rnode = NULL; \ | |
| 46 | } while (0) | |
| 47 | ||
| 48 | int radix_tree_insert(struct radix_tree_root *, unsigned long, void *); | |
| 49 | void *radix_tree_lookup(struct radix_tree_root *, unsigned long); | |
| a4331366 | 50 | void **radix_tree_lookup_slot(struct radix_tree_root *, unsigned long); |
| 1da177e4 LT |
51 | void *radix_tree_delete(struct radix_tree_root *, unsigned long); |
| 52 | unsigned int | |
| 53 | radix_tree_gang_lookup(struct radix_tree_root *root, void **results, | |
| 54 | unsigned long first_index, unsigned int max_items); | |
| dd0fc66f | 55 | int radix_tree_preload(gfp_t gfp_mask); |
| 1da177e4 LT |
56 | void radix_tree_init(void); |
| 57 | void *radix_tree_tag_set(struct radix_tree_root *root, | |
| 58 | unsigned long index, int tag); | |
| 59 | void *radix_tree_tag_clear(struct radix_tree_root *root, | |
| 60 | unsigned long index, int tag); | |
| 61 | int radix_tree_tag_get(struct radix_tree_root *root, | |
| 62 | unsigned long index, int tag); | |
| 63 | unsigned int | |
| 64 | radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results, | |
| 65 | unsigned long first_index, unsigned int max_items, int tag); | |
| 66 | int radix_tree_tagged(struct radix_tree_root *root, int tag); | |
| 67 | ||
| 68 | static inline void radix_tree_preload_end(void) | |
| 69 | { | |
| 70 | preempt_enable(); | |
| 71 | } | |
| 72 | ||
| 73 | #endif /* _LINUX_RADIX_TREE_H */ |