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1 | #ifndef _LTTNG_ERROR_H |
2 | #define _LTTNG_ERROR_H | |
3 | ||
4 | /* | |
5 | * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; only | |
10 | * version 2.1 of the License. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <urcu/compiler.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | #define MAX_ERRNO 4095 | |
26 | ||
27 | static inline | |
28 | int IS_ERR_VALUE(long value) | |
29 | { | |
30 | if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO)) | |
31 | return 1; | |
32 | else | |
33 | return 0; | |
34 | } | |
35 | ||
36 | static inline | |
37 | void *ERR_PTR(long error) | |
38 | { | |
39 | return (void *) error; | |
40 | } | |
41 | ||
42 | static inline | |
43 | long PTR_ERR(const void *ptr) | |
44 | { | |
45 | return (long) ptr; | |
46 | } | |
47 | ||
48 | static inline | |
49 | int IS_ERR(const void *ptr) | |
50 | { | |
51 | return IS_ERR_VALUE((long) ptr); | |
52 | } | |
53 | ||
54 | #endif /* _LTTNG_ERROR_H */ |