| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2001 Momchil Velikov |
| * Portions Copyright (C) 2001 Christoph Hellwig |
| */ |
| #ifndef __LIBFROG_RADIX_TREE_H__ |
| #define __LIBFROG_RADIX_TREE_H__ |
| |
| #define RADIX_TREE_TAGS |
| |
| struct radix_tree_root { |
| unsigned int height; |
| struct radix_tree_node *rnode; |
| }; |
| |
| #define RADIX_TREE_INIT(mask) { \ |
| .height = 0, \ |
| .rnode = NULL, \ |
| } |
| |
| #define RADIX_TREE(name, mask) \ |
| struct radix_tree_root name = RADIX_TREE_INIT(mask) |
| |
| #define INIT_RADIX_TREE(root, mask) \ |
| do { \ |
| (root)->height = 0; \ |
| (root)->rnode = NULL; \ |
| } while (0) |
| |
| #ifdef RADIX_TREE_TAGS |
| #define RADIX_TREE_MAX_TAGS 2 |
| #endif |
| |
| int radix_tree_insert(struct radix_tree_root *, unsigned long, void *); |
| void *radix_tree_lookup(struct radix_tree_root *, unsigned long); |
| void **radix_tree_lookup_slot(struct radix_tree_root *, unsigned long); |
| void *radix_tree_lookup_first(struct radix_tree_root *, unsigned long *); |
| void *radix_tree_delete(struct radix_tree_root *, unsigned long); |
| unsigned int |
| radix_tree_gang_lookup(struct radix_tree_root *root, void **results, |
| unsigned long first_index, unsigned int max_items); |
| unsigned int |
| radix_tree_gang_lookup_ex(struct radix_tree_root *root, void **results, |
| unsigned long first_index, unsigned long last_index, |
| unsigned int max_items); |
| |
| void radix_tree_init(void); |
| |
| #ifdef RADIX_TREE_TAGS |
| void *radix_tree_tag_set(struct radix_tree_root *root, |
| unsigned long index, unsigned int tag); |
| void *radix_tree_tag_clear(struct radix_tree_root *root, |
| unsigned long index, unsigned int tag); |
| int radix_tree_tag_get(struct radix_tree_root *root, |
| unsigned long index, unsigned int tag); |
| unsigned int |
| radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results, |
| unsigned long first_index, unsigned int max_items, |
| unsigned int tag); |
| int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag); |
| #endif |
| |
| static inline int radix_tree_preload(int gfp_mask) { return 0; } |
| static inline void radix_tree_preload_end(void) { } |
| |
| #endif /* __LIBFROG_RADIX_TREE_H__ */ |