1 | /* $NetBSD: err.h,v 1.1 2015/08/18 21:10:56 skrll 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_ERR_H_ |
33 | #define _LINUX_ERR_H_ |
34 | |
35 | /* XXX Linux uses long and int inconsistently here. Hope this works out. */ |
36 | |
37 | #include <sys/types.h> |
38 | #include <sys/errno.h> |
39 | #include <sys/systm.h> |
40 | |
41 | #define MAX_ERRNO ELAST |
42 | |
43 | static inline bool |
44 | IS_ERR_VALUE(uintptr_t n) |
45 | { |
46 | return (n >= (uintptr_t)-MAX_ERRNO); |
47 | } |
48 | |
49 | static inline void * |
50 | ERR_PTR(long error) |
51 | { |
52 | KASSERT(error < 0); |
53 | return (void *)(intptr_t)error; |
54 | } |
55 | |
56 | static inline long |
57 | PTR_ERR(const void *ptr) |
58 | { |
59 | KASSERT(ptr == (void *)(intptr_t)(long)(intptr_t)ptr); /* XXX Hurk! */ |
60 | return (long)(intptr_t)ptr; |
61 | } |
62 | |
63 | static inline bool |
64 | IS_ERR(const void *ptr) |
65 | { |
66 | return IS_ERR_VALUE((uintptr_t)ptr); |
67 | } |
68 | |
69 | static inline bool |
70 | IS_ERR_OR_NULL(const void *ptr) |
71 | { |
72 | return ((ptr == NULL) || IS_ERR(ptr)); |
73 | } |
74 | |
75 | static inline void * |
76 | ERR_CAST(void *ptr) /* XXX Linux declares with const. */ |
77 | { |
78 | return ptr; |
79 | } |
80 | |
81 | static inline long |
82 | PTR_RET(const void *ptr) |
83 | { |
84 | return (IS_ERR(ptr)? PTR_ERR(ptr) : 0); |
85 | } |
86 | |
87 | #endif /* _LINUX_ERR_H_ */ |
88 | |