Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/rpst.h
Version:
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1 /* $NetBSD: rpst.h,v 1.3 2011/04/14 15:31:20 yamt Exp $ */ 2 3 /*- 4 * Copyright (c)2009 YAMAMOTO Takashi, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #if !defined(_SYS_RPST_H_) 30 #define _SYS_RPST_H_ 31 32 #if defined(_KERNEL) || defined(_STANDALONE) 33 #include <sys/types.h> 34 #else /* defined(_KERNEL) || defined(_STANDALONE) */ 35 #include <stdint.h> 36 #endif /* defined(_KERNEL) || defined(_STANDALONE) */ 37 38 struct rpst_tree { 39 struct rpst_node *t_root; 40 unsigned int t_height; 41 }; 42 43 struct rpst_node { 44 struct rpst_node *n_parent; 45 struct rpst_node *n_children[2]; 46 uint64_t n_y; 47 uint64_t n_x; 48 }; 49 50 struct rpst_iterator { 51 struct rpst_tree *it_tree; 52 struct rpst_node *it_cur; 53 unsigned int it_idx; 54 unsigned int it_level; 55 uint64_t it_max_y; 56 uint64_t it_min_x; 57 uint64_t it_max_x; 58 }; 59 60 void rpst_init_tree(struct rpst_tree *); 61 struct rpst_node *rpst_insert_node(struct rpst_tree *, struct rpst_node *); 62 void rpst_remove_node(struct rpst_tree *, struct rpst_node *); 63 struct rpst_node *rpst_iterate_first(struct rpst_tree *, uint64_t, uint64_t, 64 uint64_t, struct rpst_iterator *); 65 struct rpst_node *rpst_iterate_next(struct rpst_iterator *); 66 67 #endif /* !defined(_SYS_RPST_H_) */
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