vm_radix.h revision 245254
1/* 2 * Copyright (c) 2011 Jeffrey Roberson <jeff@freebsd.org> 3 * Copyright (c) 2008 Mayur Shardul <mayur.shardul@gmail.com> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 */ 28 29#ifndef _VM_RADIX_H_ 30#define _VM_RADIX_H_ 31 32/* 33 * Radix tree root. The height and pointer are set together to permit 34 * coherent lookups while the root is modified. 35 */ 36struct vm_radix { 37 uintptr_t rt_root; /* root + height */ 38}; 39 40#ifdef _KERNEL 41 42void vm_radix_init(void); 43int vm_radix_insert(struct vm_radix *, vm_pindex_t, void *); 44void *vm_radix_lookup(struct vm_radix *, vm_pindex_t); 45void *vm_radix_lookup_ge(struct vm_radix *, vm_pindex_t); 46void *vm_radix_lookup_le(struct vm_radix *, vm_pindex_t); 47void vm_radix_reclaim_allnodes(struct vm_radix *); 48void vm_radix_remove(struct vm_radix *, vm_pindex_t); 49 50#endif /* _KERNEL */ 51#endif /* !_VM_RADIX_H_ */ 52