11553Srgrimes/* 21553Srgrimes * Copyright (c) 2013 EMC Corp. 31553Srgrimes * Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org> 41553Srgrimes * Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com> 51553Srgrimes * All rights reserved. 61553Srgrimes * 71553Srgrimes * Redistribution and use in source and binary forms, with or without 81553Srgrimes * modification, are permitted provided that the following conditions 91553Srgrimes * are met: 101553Srgrimes * 1. Redistributions of source code must retain the above copyright 111553Srgrimes * notice, this list of conditions and the following disclaimer. 121553Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 131553Srgrimes * notice, this list of conditions and the following disclaimer in the 141553Srgrimes * documentation and/or other materials provided with the distribution. 151553Srgrimes * 161553Srgrimes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 171553Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 181553Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 191553Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 201553Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 211553Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 221553Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 231553Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 241553Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 251553Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 261553Srgrimes * SUCH DAMAGE. 271553Srgrimes * 281553Srgrimes * $FreeBSD$ 2950479Speter */ 301553Srgrimes 311553Srgrimes#ifndef __SYS_PCTRIE_H_ 321553Srgrimes#define __SYS_PCTRIE_H_ 3379537Sru 341553Srgrimes/* 351553Srgrimes * Radix tree root. 361553Srgrimes */ 371553Srgrimesstruct pctrie { 3868965Sru uintptr_t pt_root; 3913107Sbde}; 40129833Smaxim 41129833Smaxim#ifdef _KERNEL 421553Srgrimes 4399968Scharnierstatic __inline boolean_t 4499968Scharnierpctrie_is_empty(struct pctrie *ptree) 4599968Scharnier{ 461553Srgrimes 4729736Scharnier return (ptree->pt_root == 0); 481553Srgrimes} 491553Srgrimes 501553Srgrimes#endif /* _KERNEL */ 511553Srgrimes#endif /* !__SYS_PCTRIE_H_ */ 521553Srgrimes