1 /*
2  * Public domain
3  * sys/time.h compatibility shim
4  */
5 
6 #include_next <sys/time.h>
7 
8 #ifndef timespecsub
9 #define	timespecsub(tsp, usp, vsp)					\
10 	do {								\
11 		(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;		\
12 		(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;	\
13 		if ((vsp)->tv_nsec < 0) {				\
14 			(vsp)->tv_sec--;				\
15 			(vsp)->tv_nsec += 1000000000L;			\
16 		}							\
17 	} while (0)
18 #endif
19