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#include_next <sys/time.h>
#define	timespeccmp(tsp, usp, cmp)					\
	(((tsp)->tv_sec == (usp)->tv_sec) ?				\
	    ((tsp)->tv_nsec cmp (usp)->tv_nsec) :			\
	    ((tsp)->tv_sec cmp (usp)->tv_sec))
#define	timespecsub(tsp, usp, vsp)					\
	do {								\
		(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;		\
		(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;	\
		if ((vsp)->tv_nsec < 0) {				\
			(vsp)->tv_sec--;				\
			(vsp)->tv_nsec += 1000000000L;			\
		}							\
	} while (0)