linux/include/linux/assoc_array.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Generic associative array implementation.
 *
 * See Documentation/core-api/assoc_array.rst for information.
 *
 * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#ifndef _LINUX_ASSOC_ARRAY_H
#define _LINUX_ASSOC_ARRAY_H

#ifdef CONFIG_ASSOCIATIVE_ARRAY

#include <linux/types.h>

#define ASSOC_ARRAY_KEY_CHUNK_SIZE …

/*
 * Generic associative array.
 */
struct assoc_array { … };

/*
 * Operations on objects and index keys for use by array manipulation routines.
 */
struct assoc_array_ops { … };

/*
 * Access and manipulation functions.
 */
struct assoc_array_edit;

static inline void assoc_array_init(struct assoc_array *array)
{ … }

extern int assoc_array_iterate(const struct assoc_array *array,
			       int (*iterator)(const void *object,
					       void *iterator_data),
			       void *iterator_data);
extern void *assoc_array_find(const struct assoc_array *array,
			      const struct assoc_array_ops *ops,
			      const void *index_key);
extern void assoc_array_destroy(struct assoc_array *array,
				const struct assoc_array_ops *ops);
extern struct assoc_array_edit *assoc_array_insert(struct assoc_array *array,
						   const struct assoc_array_ops *ops,
						   const void *index_key,
						   void *object);
extern void assoc_array_insert_set_object(struct assoc_array_edit *edit,
					  void *object);
extern struct assoc_array_edit *assoc_array_delete(struct assoc_array *array,
						   const struct assoc_array_ops *ops,
						   const void *index_key);
extern struct assoc_array_edit *assoc_array_clear(struct assoc_array *array,
						  const struct assoc_array_ops *ops);
extern void assoc_array_apply_edit(struct assoc_array_edit *edit);
extern void assoc_array_cancel_edit(struct assoc_array_edit *edit);
extern int assoc_array_gc(struct assoc_array *array,
			  const struct assoc_array_ops *ops,
			  bool (*iterator)(void *object, void *iterator_data),
			  void *iterator_data);

#endif /* CONFIG_ASSOCIATIVE_ARRAY */
#endif /* _LINUX_ASSOC_ARRAY_H */