4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
31 #include <sys/zfs_context.h>
37 /* The number of significant bits in each unique value. */
38 #define UNIQUE_BITS 56
40 void unique_init(void);
41 void unique_fini(void);
44 * Return a new unique value (which will not be uniquified against until
45 * it is unique_insert()-ed.
47 uint64_t unique_create(void);
49 /* Return a unique value, which equals the one passed in if possible. */
50 uint64_t unique_insert(uint64_t value);
52 /* Indicate that this value no longer needs to be uniquified against. */
53 void unique_remove(uint64_t value);
59 #endif /* _SYS_UNIQUE_H */