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d79865b9 MD |
1 | #ifndef _BABELTRACE_COMPILER_H |
2 | #define _BABELTRACE_COMPILER_H | |
3 | ||
ccd7e1c8 MD |
4 | /* |
5 | * compiler.h | |
6 | * | |
7 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
8 | * | |
9 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
10 | * of this software and associated documentation files (the "Software"), to deal | |
11 | * in the Software without restriction, including without limitation the rights | |
12 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
13 | * copies of the Software, and to permit persons to whom the Software is | |
14 | * furnished to do so, subject to the following conditions: | |
15 | * | |
16 | * The above copyright notice and this permission notice shall be included in | |
17 | * all copies or substantial portions of the Software. | |
18 | */ | |
19 | ||
334c0a83 MD |
20 | #include <stddef.h> /* for offsetof */ |
21 | ||
d79865b9 MD |
22 | #define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)])) |
23 | ||
fc93b2bd MD |
24 | #ifndef container_of |
25 | #define container_of(ptr, type, member) \ | |
26 | ({ \ | |
27 | const typeof(((type *)NULL)->member) * __ptr = (ptr); \ | |
28 | (type *)((char *)__ptr - offsetof(type, member)); \ | |
29 | }) | |
30 | #endif | |
31 | ||
d79865b9 | 32 | #endif /* _BABELTRACE_COMPILER_H */ |