defer.h


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#ifndef __DEFER_H__
#define __DEFER_H__

#ifndef __unused
#define __unused	__attribute__((unused))
#endif

#define __cleanup(f)	__attribute__((cleanup(f)))

#define CAT(a, b)	CAT_(a, b)
#define CAT_(a, b)	a ## b

#define UNIQ(name)	CAT(name, __LINE__)

#define defer						\
    auto void UNIQ(defer_func)(int *);			\
    int UNIQ(defer_var) __cleanup(UNIQ(defer_func));	\
    void UNIQ(defer_func)(int *__arg __unused)

#endif