Cregit: Linux 6.10: typecheck.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Chuck Ebbert	11	26.83%	1	16.67%
David S. Miller	10	24.39%	1	16.67%
Kumar Kartikeya Dwivedi	9	21.95%	1	16.67%
Andrew Morton	9	21.95%	1	16.67%
Greg Kroah-Hartman	1	2.44%	1	16.67%
Jörn Engel	1	2.44%	1	16.67%
Total	41		6

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef TYPECHECK_H_INCLUDED
#define TYPECHECK_H_INCLUDED

/*
 * Check at compile time that something is of a particular type.
 * Always evaluates to 1 so you may use it easily in comparisons.
 */
#define typecheck(type,x) \
({	type __dummy; \
	typeof(x) __dummy2; \
	(void)(&__dummy == &__dummy2); \
	1; \
})

/*
 * Check at compile time that 'function' is a certain type, or is a pointer
 * to that type (needs to use typedef for the function type.)
 */
#define typecheck_fn(type,function) \
({	typeof(type) __tmp = function; \
	(void)__tmp; \
})

/*
 * Check at compile time that something is a pointer type.
 */
#define typecheck_pointer(x) \
({	typeof(x) __dummy; \
	(void)sizeof(*__dummy); \
	1; \
})

#endif		/* TYPECHECK_H_INCLUDED */