return *v, nil
	}

	// Fetch new value asynchronously, while we do not return an error
	// if v != nil value or
	if t.opts.NoWait && v != nil && tNow-vTime < ttl.Milliseconds()*2 {
		if t.updating.TryLock() {
			go func() {
				defer t.updating.Unlock()
				t.update(context.Background())
			}()
		}
		return *v, nil
	}

	// Get lock. Either we get it or we wait for it.
	t.updating.Lock()

        }

        @Override
        boolean isLockedByCurrentThread() {
            return locked && Thread.currentThread() == owner
        }

        @Override
        boolean tryLock() {
            if (!locks.contains(this) && locked) {
                return false
            }
            locked = true
            locks.add(this)
            return true
        }

}


internal
inline fun <reified T> MethodVisitor.TRY_CATCH(
    noinline tryBlock: MethodVisitor.() -> Unit,
    noinline catchBlock: MethodVisitor.() -> Unit
) =
    TRY_CATCH(T::class.internalName, tryBlock, catchBlock)


internal
fun MethodVisitor.TRY_CATCH(
    exceptionType: InternalName,
    tryBlock: MethodVisitor.() -> Unit,
    catchBlock: MethodVisitor.() -> Unit
) {

}


internal
inline fun <reified T> MethodVisitor.TRY_CATCH(
    noinline tryBlock: MethodVisitor.() -> Unit,
    noinline catchBlock: MethodVisitor.() -> Unit
) =
    TRY_CATCH(T::class.internalName, tryBlock, catchBlock)


internal
fun MethodVisitor.TRY_CATCH(
    exceptionType: InternalName,
    tryBlock: MethodVisitor.() -> Unit,
    catchBlock: MethodVisitor.() -> Unit
) {

TEXT ·Oruintptr(SB), NOSPLIT, $0-12
	JMP	·Or32(SB)

TEXT ·spinLock(SB),NOSPLIT,$0-4
	MOVW	state+0(FP), R1
	MOVW	$1, R2
	SYNC
try_lock:
	MOVW	R2, R3
check_again:
	LL	(R1), R4
	BNE	R4, check_again
	SC	R3, (R1)
	BEQ	R3, try_lock
	SYNC
	RET

TEXT ·spinUnlock(SB),NOSPLIT,$0-4
	MOVW	state+0(FP), R1
	SYNC
	MOVW	R0, (R1)
	SYNC