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idr.h revision 1.1.2.6 
      1 /*	$NetBSD: idr.h,v 1.1.2.6 2013/07/24 03:13:59 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_IDR_H_
     33 #define _LINUX_IDR_H_
     34 
     35 #include <sys/types.h>
     36 #include <sys/rwlock.h>
     37 #include <sys/rbtree.h>
     38 
     39 /* XXX Stupid expedient algorithm should be replaced by something better.  */
     40 
     41 struct idr {
     42 	krwlock_t idr_lock;
     43 	rb_tree_t idr_tree;
     44 	struct idr_node *idr_temp;
     45 };
     46 
     47 /* XXX Make the nm output a little more greppable...  */
     48 #define	idr_init		linux_idr_init
     49 #define	idr_destroy		linux_idr_destroy
     50 #define	idr_find		linux_idr_find
     51 #define	idr_replace		linux_idr_replace
     52 #define	idr_remove		linux_idr_remove
     53 #define	idr_remove_all		linux_idr_remove_all
     54 #define	idr_pre_get		linux_idr_pre_get
     55 #define	idr_get_new_above	linux_idr_get_new_above
     56 #define	idr_for_each		linux_idr_for_each
     57 
     58 void	idr_init(struct idr *);
     59 void	idr_destroy(struct idr *);
     60 void	*idr_find(struct idr *, int);
     61 void	*idr_replace(struct idr *, void *, int);
     62 void	idr_remove(struct idr *, int);
     63 void	idr_remove_all(struct idr *);
     64 int	idr_pre_get(struct idr *, int);
     65 int	idr_get_new_above(struct idr *, void *, int, int *);
     66 int	idr_for_each(struct idr *, int (*)(int, void *, void *), void *);
     67 
     68 #endif  /* _LINUX_IDR_H_ */
     69