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// 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__ */