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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2015 Joyent, Inc.
*/
#ifndef _SYS_REFHASH_H
#define _SYS_REFHASH_H
#include <sys/types.h>
#include <sys/list.h>
#define RHL_F_DEAD 0x01
typedef struct refhash_link {
list_node_t rhl_chain_link;
list_node_t rhl_global_link;
uint_t rhl_flags;
uint_t rhl_refcnt;
} refhash_link_t;
typedef uint64_t (*refhash_hash_f)(const void *);
typedef int (*refhash_cmp_f)(const void *, const void *);
typedef void (*refhash_dtor_f)(void *);
typedef int (*refhash_eval_f)(const void *, void *);
typedef struct refhash {
list_t *rh_buckets;
uint_t rh_bucket_count;
list_t rh_objs;
size_t rh_obj_size; /* used by mdb */
size_t rh_link_off;
size_t rh_tag_off;
refhash_hash_f rh_hash;
refhash_cmp_f rh_cmp;
refhash_dtor_f rh_dtor;
} refhash_t;
extern refhash_t *refhash_create(uint_t, refhash_hash_f, refhash_cmp_f,
refhash_dtor_f, size_t, size_t, size_t, int);
extern void refhash_destroy(refhash_t *);
extern void refhash_insert(refhash_t *, void *);
extern void refhash_remove(refhash_t *, void *);
extern void *refhash_lookup(refhash_t *, const void *);
extern void *refhash_linear_search(refhash_t *, refhash_eval_f, void *);
extern void refhash_hold(refhash_t *, void *);
extern void refhash_rele(refhash_t *, void *);
extern void *refhash_first(refhash_t *);
extern void *refhash_next(refhash_t *, void *);
extern boolean_t refhash_obj_valid(refhash_t *hp, const void *);
#endif /* _SYS_REFHASH_H */
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