GeezerVison is showing codebrowser.dev — typecheck.h source code [linux/include/linux/typecheck.h] - Codebrowser
| 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 | /* |
|---|
| 26 | * Check at compile time that something is a pointer type. |
|---|
| 27 | */ |
|---|
| 28 | #define typecheck_pointer(x) \ |
|---|
| 29 | ({ typeof(x) __dummy; \ |
|---|
| 30 | (void)sizeof(*__dummy); \ |
|---|
| 31 | 1; \ |
|---|
| 32 | }) |
|---|
| 33 | |
|---|
| 34 | #endif /* TYPECHECK_H_INCLUDED */ |
|---|
| 35 | |
|---|
