Commit | Line | Data |
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8f3f8c99 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8f3f8c99 | 3 | * |
c0c0989a | 4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
8f3f8c99 MD |
5 | */ |
6 | ||
9c4fe08d MJ |
7 | #ifndef _UST_COMMON_ERR_PTR_H |
8 | #define _UST_COMMON_ERR_PTR_H | |
c0c0989a | 9 | |
8f3f8c99 MD |
10 | #include <urcu/compiler.h> |
11 | #include <unistd.h> | |
12 | ||
13 | #define MAX_ERRNO 4095 | |
14 | ||
15 | static inline | |
16 | int IS_ERR_VALUE(long value) | |
17 | { | |
18 | if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO)) | |
19 | return 1; | |
20 | else | |
21 | return 0; | |
22 | } | |
23 | ||
24 | static inline | |
25 | void *ERR_PTR(long error) | |
26 | { | |
27 | return (void *) error; | |
28 | } | |
29 | ||
30 | static inline | |
31 | long PTR_ERR(const void *ptr) | |
32 | { | |
33 | return (long) ptr; | |
34 | } | |
35 | ||
36 | static inline | |
37 | int IS_ERR(const void *ptr) | |
38 | { | |
39 | return IS_ERR_VALUE((long) ptr); | |
40 | } | |
41 | ||
9c4fe08d | 42 | #endif /* _UST_COMMON_ERR_PTR_H */ |