Function lockmgr_xholder

freebsd/kern/kern_lock.c:250–257

}

static __inline struct thread *
lockmgr_xholder(const struct lock *lk)
{
	uintptr_t x;

	x = lockmgr_read_value(lk);
	return ((x & LK_SHARE) ? NULL : (struct thread *)LK_HOLDER(x));
}

/*
 * It assumes sleepq_lock held and returns with this one unheld.