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