usr/src/uts/common/fs/zfs/sys/unique.h
author ahrens
Mon, 09 Oct 2006 10:56:01 -0700
changeset 2885 c0259887ebbc
parent 789 b348f31ed315
child 4787 602d3f97842c
permissions -rw-r--r--
6460059 zfs destroy <snapshot> leaves behind kruft 6463788 'zfs recv -d' fails if some ancestors already exist 6464897 assertion failed: "BP_GET_COMPRESS(bp) == compress" zio.c, line:897 6472843 panic when write to zvol snapshot 6475506 panic in dmu_recvbackup due to NULL pointer dereference 6475942 need more assertions in dnode_destroy() 6477102 recvbackup ioctl does not advance file offset 6477103 read-only properties should be passed as nvlist 6477900 want more /etc/system tunables for ZFS performance analysis 6479497 ::abuf_find is broken

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef	_SYS_UNIQUE_H
#define	_SYS_UNIQUE_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <sys/zfs_context.h>

#ifdef	__cplusplus
extern "C" {
#endif

/* The number of significant bits in each unique value. */
#define	UNIQUE_BITS	56

void unique_init(void);

/* Return a new unique value. */
uint64_t unique_create(void);

/* Return a unique value, which equals the one passed in if possible. */
uint64_t unique_insert(uint64_t value);

/* Indicate that this value no longer needs to be uniquified against. */
void unique_remove(uint64_t value);

#ifdef	__cplusplus
}
#endif

#endif /* _SYS_UNIQUE_H */