/include/linux/typecheck.h

https://github.com/airy09/android_kernel_sony_apq8064 · C Header · 24 lines · 13 code · 3 blank · 8 comment · 1 complexity · b126b84611d4b4e30fdc865112fc72be MD5 · raw file 

    

  1. #ifndef TYPECHECK_H_INCLUDED
    2. 

  2. #define TYPECHECK_H_INCLUDED
    3. 

  3. 

  4. /*
    5. 

  5.  * Check at compile time that something is of a particular type.
    6. 

  6.  * Always evaluates to 1 so you may use it easily in comparisons.
    7. 

  7.  */
    8. 

  8. #define typecheck(type,x) \
    9. 

  9. ({	type __dummy; \
    10. 

  10. 	typeof(x) __dummy2; \
    11. 

  11. 	(void)(&__dummy == &__dummy2); \
    12. 

  12. 	1; \
    13. 

  13. })
    14. 

  14. 

  15. /*
    16. 

  16.  * Check at compile time that 'function' is a certain type, or is a pointer
    17. 

  17.  * to that type (needs to use typedef for the function type.)
    18. 

  18.  */
    19. 

  19. #define typecheck_fn(type,function) \
    20. 

  20. ({	typeof(type) __tmp = function; \
    21. 

  21. 	(void)__tmp; \
    22. 

  22. })
    23. 

  23. 

  24. #endif		/* TYPECHECK_H_INCLUDED */
    25.