atexit.h

标准c库代码,可以应用于各个系统提供了大量的基本函数

/*
 *	%G% (UofMD) %D%
 */

#define	ATEXIT_SIZE 32	/* must be at least 32 to guarantee ANSI conformance */

struct atexit {
	struct	atexit *next;		/* next in list */
	int	ind;			/* next index in this table */
	void	(*fns[ATEXIT_SIZE])();	/* the table itself */
};

struct atexit *__atexit;	/* points to head of LIFO stack */