FreeBSD/Linux Kernel Cross Reference
sys/lib/libkern/rb.h

     /* $NetBSD: rb.h,v 1.2 2002/10/08 11:58:54 simonb Exp $ */
     
     /*-
      * Copyright (c) 2001 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Matt Thomas <matt@3am-software.com>.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    #ifndef _LIBKERN_RB_H_
    #define _LIBKERN_RB_H_
    
    #include <sys/types.h>
    #include <sys/queue.h>
    
    struct rb_node {
            struct rb_node *rb_nodes[3];
    #define RB_LEFT         0
    #define RB_RIGHT        1
    #define RB_OTHER        1
    #define RB_PARENT       2
    #define rb_left         rb_nodes[RB_LEFT]
    #define rb_right        rb_nodes[RB_RIGHT]
    #define rb_parent       rb_nodes[RB_PARENT]
            TAILQ_ENTRY(rb_node) rb_link;
            int rb_balance : 16;
            unsigned int rb_red : 1;
            unsigned int rb_sentinel : 1;
            unsigned int rb_position : 2;
    };
    
    TAILQ_HEAD(rb_node_qh, rb_node);
    
    typedef int (*rb_compare_nodes_fn)(const struct rb_node *,
        const struct rb_node *);
    typedef int (*rb_compare_key_fn)(const struct rb_node *, const void *);
    typedef void (*rb_print_node_fn)(const struct rb_node *, const char *);
    
    struct rb_tree {
            struct rb_node *rbt_root;
            struct rb_node_qh rbt_nodes;
            rb_compare_nodes_fn rbt_compare_nodes;
            rb_compare_key_fn rbt_compare_key;
            rb_print_node_fn rbt_print_node;
            u_int rbt_count;
    };
    
    void    rb_tree_init(struct rb_tree *, rb_compare_nodes_fn, rb_compare_key_fn,
                rb_print_node_fn);
    void    rb_tree_insert_node(struct rb_tree *, struct rb_node *);
    struct rb_node  *rb_tree_find(struct rb_tree *, void *);
    void    rb_tree_remove_node(struct rb_tree *, struct rb_node *);
    
    #endif  /* _LIBKERN_RB_H_*/

Cache object: 61bbff96ccb4a30589e7e3d646b1b71b