4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
30 #pragma ident "%Z%%M% %I% %E% SMI"
32 #include <sys/zfs_context.h>
38 /* The number of significant bits in each unique value. */
39 #define UNIQUE_BITS 56
41 void unique_init(void);
43 /* Return a new unique value. */
44 uint64_t unique_create(void);
46 /* Return a unique value, which equals the one passed in if possible. */
47 uint64_t unique_insert(uint64_t value);
49 /* Indicate that this value no longer needs to be uniquified against. */
50 void unique_remove(uint64_t value);
56 #endif /* _SYS_UNIQUE_H */