idr.h revision 1.3
1 1.3 riastrad /* $NetBSD: idr.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_IDR_H_ 33 1.2 riastrad #define _LINUX_IDR_H_ 34 1.2 riastrad 35 1.2 riastrad #include <sys/types.h> 36 1.2 riastrad #include <sys/rwlock.h> 37 1.2 riastrad #include <sys/rbtree.h> 38 1.3 riastrad #include <sys/queue.h> 39 1.3 riastrad 40 1.3 riastrad #include <linux/gfp.h> 41 1.2 riastrad 42 1.2 riastrad /* XXX Stupid expedient algorithm should be replaced by something better. */ 43 1.2 riastrad 44 1.2 riastrad struct idr { 45 1.3 riastrad kmutex_t idr_lock; 46 1.3 riastrad rb_tree_t idr_tree; 47 1.2 riastrad }; 48 1.2 riastrad 49 1.2 riastrad /* XXX Make the nm output a little more greppable... */ 50 1.2 riastrad #define idr_init linux_idr_init 51 1.2 riastrad #define idr_destroy linux_idr_destroy 52 1.3 riastrad #define idr_is_empty linux_idr_is_empty 53 1.2 riastrad #define idr_find linux_idr_find 54 1.2 riastrad #define idr_replace linux_idr_replace 55 1.2 riastrad #define idr_remove linux_idr_remove 56 1.3 riastrad #define idr_preload linux_idr_preload 57 1.3 riastrad #define idr_alloc linux_idr_alloc 58 1.3 riastrad #define idr_preload_end linux_idr_preload_end 59 1.2 riastrad #define idr_for_each linux_idr_for_each 60 1.2 riastrad 61 1.3 riastrad int linux_idr_module_init(void); 62 1.3 riastrad void linux_idr_module_fini(void); 63 1.3 riastrad 64 1.2 riastrad void idr_init(struct idr *); 65 1.2 riastrad void idr_destroy(struct idr *); 66 1.3 riastrad bool idr_is_empty(struct idr *); 67 1.2 riastrad void *idr_find(struct idr *, int); 68 1.2 riastrad void *idr_replace(struct idr *, void *, int); 69 1.2 riastrad void idr_remove(struct idr *, int); 70 1.3 riastrad void idr_preload(gfp_t); 71 1.3 riastrad int idr_alloc(struct idr *, void *, int, int, gfp_t); 72 1.3 riastrad void idr_preload_end(void); 73 1.2 riastrad int idr_for_each(struct idr *, int (*)(int, void *, void *), void *); 74 1.2 riastrad 75 1.3 riastrad struct ida { 76 1.3 riastrad struct idr ida_idr; 77 1.3 riastrad }; 78 1.3 riastrad 79 1.3 riastrad static inline void 80 1.3 riastrad ida_init(struct ida *ida) 81 1.3 riastrad { 82 1.3 riastrad 83 1.3 riastrad idr_init(&ida->ida_idr); 84 1.3 riastrad } 85 1.3 riastrad 86 1.3 riastrad static inline void 87 1.3 riastrad ida_destroy(struct ida *ida) 88 1.3 riastrad { 89 1.3 riastrad 90 1.3 riastrad idr_destroy(&ida->ida_idr); 91 1.3 riastrad } 92 1.3 riastrad 93 1.3 riastrad static inline void 94 1.3 riastrad ida_remove(struct ida *ida, int id) 95 1.3 riastrad { 96 1.3 riastrad 97 1.3 riastrad idr_remove(&ida->ida_idr, id); 98 1.3 riastrad } 99 1.3 riastrad 100 1.3 riastrad static inline int 101 1.3 riastrad ida_simple_get(struct ida *ida, unsigned start, unsigned end, gfp_t gfp) 102 1.3 riastrad { 103 1.3 riastrad int id; 104 1.3 riastrad 105 1.3 riastrad KASSERT(start <= INT_MAX); 106 1.3 riastrad KASSERT(end <= INT_MAX); 107 1.3 riastrad 108 1.3 riastrad idr_preload(gfp); 109 1.3 riastrad id = idr_alloc(&ida->ida_idr, NULL, start, end, gfp); 110 1.3 riastrad idr_preload_end(); 111 1.3 riastrad 112 1.3 riastrad return id; 113 1.3 riastrad } 114 1.3 riastrad 115 1.2 riastrad #endif /* _LINUX_IDR_H_ */ 116
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