# Set `self` to `a` - `b`
	fun minus(a, b: Timespec) `{
		time_t s = a->tv_sec - b->tv_sec;
		long ns = a->tv_nsec - b->tv_nsec;
		if (ns < 0) {
			s -= 1;
			ns += 1000000000l;
		}
		self->tv_sec = s;
		self->tv_nsec = ns;
	`}