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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_MODHASH_H
#define _SYS_MODHASH_H
/*
* Generic hash implementation for the kernel.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/zfs_context.h>
/*
* Opaque data types for storing keys and values
*/
typedef void *mod_hash_val_t;
typedef void *mod_hash_key_t;
/*
* Opaque data type for reservation
*/
typedef void *mod_hash_hndl_t;
/*
* Opaque type for hash itself.
*/
struct mod_hash;
typedef struct mod_hash mod_hash_t;
/*
* String hash table
*/
mod_hash_t *mod_hash_create_strhash_nodtr(char *, size_t,
void (*)(mod_hash_val_t));
mod_hash_t *mod_hash_create_strhash(char *, size_t, void (*)(mod_hash_val_t));
void mod_hash_destroy_strhash(mod_hash_t *);
int mod_hash_strkey_cmp(mod_hash_key_t, mod_hash_key_t);
void mod_hash_strkey_dtor(mod_hash_key_t);
void mod_hash_strval_dtor(mod_hash_val_t);
uint_t mod_hash_bystr(void *, mod_hash_key_t);
/*
* Pointer hash table
*/
mod_hash_t *mod_hash_create_ptrhash(char *, size_t, void (*)(mod_hash_val_t),
size_t);
void mod_hash_destroy_ptrhash(mod_hash_t *);
int mod_hash_ptrkey_cmp(mod_hash_key_t, mod_hash_key_t);
uint_t mod_hash_byptr(void *, mod_hash_key_t);
/*
* ID hash table
*/
mod_hash_t *mod_hash_create_idhash(char *, size_t, void (*)(mod_hash_val_t));
void mod_hash_destroy_idhash(mod_hash_t *);
int mod_hash_idkey_cmp(mod_hash_key_t, mod_hash_key_t);
uint_t mod_hash_byid(void *, mod_hash_key_t);
uint_t mod_hash_iddata_gen(size_t);
/*
* Hash management functions
*/
mod_hash_t *mod_hash_create_extended(char *, size_t, void (*)(mod_hash_key_t),
void (*)(mod_hash_val_t), uint_t (*)(void *, mod_hash_key_t), void *,
int (*)(mod_hash_key_t, mod_hash_key_t), int);
void mod_hash_destroy_hash(mod_hash_t *);
void mod_hash_clear(mod_hash_t *);
/*
* Null key and value destructors
*/
void mod_hash_null_keydtor(mod_hash_key_t);
void mod_hash_null_valdtor(mod_hash_val_t);
/*
* Basic hash operations
*/
/*
* Error codes for insert, remove, find, destroy.
*/
#define MH_ERR_NOMEM -1
#define MH_ERR_DUPLICATE -2
#define MH_ERR_NOTFOUND -3
/*
* Return codes for hash walkers
*/
#define MH_WALK_CONTINUE 0
#define MH_WALK_TERMINATE 1
/*
* Basic hash operations
*/
int mod_hash_insert(mod_hash_t *, mod_hash_key_t, mod_hash_val_t);
int mod_hash_replace(mod_hash_t *, mod_hash_key_t, mod_hash_val_t);
int mod_hash_remove(mod_hash_t *, mod_hash_key_t, mod_hash_val_t *);
int mod_hash_destroy(mod_hash_t *, mod_hash_key_t);
int mod_hash_find(mod_hash_t *, mod_hash_key_t, mod_hash_val_t *);
int mod_hash_find_cb(mod_hash_t *, mod_hash_key_t, mod_hash_val_t *,
void (*)(mod_hash_key_t, mod_hash_val_t));
int mod_hash_find_cb_rval(mod_hash_t *, mod_hash_key_t, mod_hash_val_t *,
int (*)(mod_hash_key_t, mod_hash_val_t), int *);
void mod_hash_walk(mod_hash_t *,
uint_t (*)(mod_hash_key_t, mod_hash_val_t *, void *), void *);
/*
* Reserving hash operations
*/
int mod_hash_reserve(mod_hash_t *, mod_hash_hndl_t *);
int mod_hash_reserve_nosleep(mod_hash_t *, mod_hash_hndl_t *);
void mod_hash_cancel(mod_hash_t *, mod_hash_hndl_t *);
int mod_hash_insert_reserve(mod_hash_t *, mod_hash_key_t, mod_hash_val_t,
mod_hash_hndl_t);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_MODHASH_H */
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