Andrew Morton | e0deaff4 | 2008-07-25 01:45:24 -0700 | [diff] [blame] | 1 | #ifndef TYPECHECK_H_INCLUDED |
| 2 | #define TYPECHECK_H_INCLUDED |
| 3 | |
| 4 | /* |
| 5 | * Check at compile time that something is of a particular type. |
| 6 | * Always evaluates to 1 so you may use it easily in comparisons. |
| 7 | */ |
| 8 | #define typecheck(type,x) \ |
| 9 | ({ type __dummy; \ |
| 10 | typeof(x) __dummy2; \ |
| 11 | (void)(&__dummy == &__dummy2); \ |
| 12 | 1; \ |
| 13 | }) |
| 14 | |
| 15 | /* |
| 16 | * Check at compile time that 'function' is a certain type, or is a pointer |
| 17 | * to that type (needs to use typedef for the function type.) |
| 18 | */ |
| 19 | #define typecheck_fn(type,function) \ |
| 20 | ({ typeof(type) __tmp = function; \ |
| 21 | (void)__tmp; \ |
| 22 | }) |
| 23 | |
| 24 | #endif /* TYPECHECK_H_INCLUDED */ |