1246423Sattilio/* 2248134Salc * Copyright (c) 2013 EMC Corp. 3246423Sattilio * Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org> 4246423Sattilio * Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com> 5246423Sattilio * All rights reserved. 6246423Sattilio * 7246423Sattilio * Redistribution and use in source and binary forms, with or without 8246423Sattilio * modification, are permitted provided that the following conditions 9246423Sattilio * are met: 10246423Sattilio * 1. Redistributions of source code must retain the above copyright 11246423Sattilio * notice, this list of conditions and the following disclaimer. 12246423Sattilio * 2. Redistributions in binary form must reproduce the above copyright 13246423Sattilio * notice, this list of conditions and the following disclaimer in the 14246423Sattilio * documentation and/or other materials provided with the distribution. 15246423Sattilio * 16246423Sattilio * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17246423Sattilio * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18246423Sattilio * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19246423Sattilio * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20246423Sattilio * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21246423Sattilio * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22246423Sattilio * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23246423Sattilio * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24246423Sattilio * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25246423Sattilio * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26246423Sattilio * SUCH DAMAGE. 27246423Sattilio * 28248448Sattilio * $FreeBSD$ 29246423Sattilio */ 30246423Sattilio 31250551Sjeff#ifndef __SYS_PCTRIE_H_ 32250551Sjeff#define __SYS_PCTRIE_H_ 33246423Sattilio 34246423Sattilio/* 35246478Sattilio * Radix tree root. 36246423Sattilio */ 37250551Sjeffstruct pctrie { 38250551Sjeff uintptr_t pt_root; 39246423Sattilio}; 40246423Sattilio 41248223Sattilio#ifdef _KERNEL 42248223Sattilio 43248134Salcstatic __inline boolean_t 44250551Sjeffpctrie_is_empty(struct pctrie *ptree) 45248134Salc{ 46248134Salc 47250551Sjeff return (ptree->pt_root == 0); 48248134Salc} 49248134Salc 50248223Sattilio#endif /* _KERNEL */ 51250551Sjeff#endif /* !__SYS_PCTRIE_H_ */ 52