1#include_next <sys/time.h>
 2#define	timespeccmp(tsp, usp, cmp)					\
 3	(((tsp)->tv_sec == (usp)->tv_sec) ?				\
 4	    ((tsp)->tv_nsec cmp (usp)->tv_nsec) :			\
 5	    ((tsp)->tv_sec cmp (usp)->tv_sec))
 6#define	timespecsub(tsp, usp, vsp)					\
 7	do {								\
 8		(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;		\
 9		(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;	\
10		if ((vsp)->tv_nsec < 0) {				\
11			(vsp)->tv_sec--;				\
12			(vsp)->tv_nsec += 1000000000L;			\
13		}							\
14	} while (0)