FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_radix.h

     /*
      * Copyright (c) 2013 EMC Corp.
      * Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org>
      * Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com>
      * All rights reserved.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _VM_RADIX_H_
    #define _VM_RADIX_H_
    
    #include <vm/_vm_radix.h>
    
    #ifdef _KERNEL
    
    int             vm_radix_insert(struct vm_radix *rtree, vm_page_t page);
    void            vm_radix_wait(void);
    boolean_t       vm_radix_is_singleton(struct vm_radix *rtree);
    vm_page_t       vm_radix_lookup(struct vm_radix *rtree, vm_pindex_t index);
    vm_page_t       vm_radix_lookup_ge(struct vm_radix *rtree, vm_pindex_t index);
    vm_page_t       vm_radix_lookup_le(struct vm_radix *rtree, vm_pindex_t index);
    void            vm_radix_reclaim_allnodes(struct vm_radix *rtree);
    vm_page_t       vm_radix_remove(struct vm_radix *rtree, vm_pindex_t index);
    vm_page_t       vm_radix_replace(struct vm_radix *rtree, vm_page_t newpage);
    void            vm_radix_zinit(void);
    
    static __inline void
    vm_radix_init(struct vm_radix *rtree)
    {
    
            rtree->rt_root = 0;
    }
    
    static __inline boolean_t
    vm_radix_is_empty(struct vm_radix *rtree)
    {
    
            return (rtree->rt_root == 0);
    }
    
    #endif /* _KERNEL */
    #endif /* !_VM_RADIX_H_ */

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