swh:1:snp:c3bf2749e3476071fa748f67b0ffa2fdc5fe49d9
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Tip revision: 67b8d5c7081221efa252e111cd52532ec6d4266f authored by Linus Torvalds on 13 May 2018, 23:15:17 UTC
Linux 4.17-rc5
Tip revision: 67b8d5c
typecheck.h
/* 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; \
})

#endif		/* TYPECHECK_H_INCLUDED */
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