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1 | /* SPDX-License-Identifier: GPL-2.0 */ | |
2 | #ifndef TYPECHECK_H_INCLUDED | |
3 | #define TYPECHECK_H_INCLUDED | |
4 | ||
5 | /* | |
6 | * Check at compile time that something is of a particular type. | |
7 | * Always evaluates to 1 so you may use it easily in comparisons. | |
8 | */ | |
9 | #define typecheck(type,x) \ | |
10 | ({ type __dummy; \ | |
11 | typeof(x) __dummy2; \ | |
12 | (void)(&__dummy == &__dummy2); \ | |
13 | 1; \ | |
14 | }) | |
15 | ||
16 | /* | |
17 | * Check at compile time that 'function' is a certain type, or is a pointer | |
18 | * to that type (needs to use typedef for the function type.) | |
19 | */ | |
20 | #define typecheck_fn(type,function) \ | |
21 | ({ typeof(type) __tmp = function; \ | |
22 | (void)__tmp; \ | |
23 | }) | |
24 | ||
25 | #endif /* TYPECHECK_H_INCLUDED */ |