Function _sx_slock_int

freebsd/kern/kern_sx.c:1253–1283

}

int
_sx_slock_int(struct sx *sx, int opts LOCK_FILE_LINE_ARG_DEF)
{
	struct thread *td;
	uintptr_t x;
	int error;

	KASSERT(kdb_active != 0 || SCHEDULER_STOPPED() ||
	    !TD_IS_IDLETHREAD(curthread),
	    ("sx_slock() by idle thread %p on sx %s @ %s:%d",
	    curthread, sx->lock_object.lo_name, file, line));
	KASSERT(sx->sx_lock != SX_LOCK_DESTROYED,
	    ("sx_slock() of destroyed sx @ %s:%d", file, line));
	WITNESS_CHECKORDER(&sx->lock_object, LOP_NEWORDER, file, line, NULL);

	error = 0;
	td = curthread;
	x = SX_READ_VALUE(sx);
	if (__predict_false(LOCKSTAT_PROFILE_ENABLED(sx__acquire) ||
	    !__sx_slock_try(sx, td, &x, true LOCK_FILE_LINE_ARG)))
		error = _sx_slock_hard(sx, opts, x LOCK_FILE_LINE_ARG);
	else
		lock_profile_obtain_lock_success(&sx->lock_object, 0, 0,
		    file, line);
	if (error == 0) {
		LOCK_LOG_LOCK("SLOCK", &sx->lock_object, 0, 0, file, line);
		WITNESS_LOCK(&sx->lock_object, 0, file, line);
		TD_LOCKS_INC(curthread);
	}
	return (error);
}

int
_sx_slock(struct sx *sx, int opts, const char *file, int line)