/* * 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 https://opensource.org/licenses/CDDL-1.0. * 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 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef _SYS_UNIQUE_H #define _SYS_UNIQUE_H #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); void unique_fini(void); /* * Return a new unique value (which will not be uniquified against until * it is unique_insert()-ed). */ 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 */