10. Ringkasan

// Counter sederhana — gunakan Atomic
let counter = Atomic(0)
counter.add(1, ordering: .relaxed)

// State dengan beberapa field — gunakan Mutex
let state = Mutex(MyState())
state.withLock { $0.field = newValue }

// Non-blocking attempt
if let result = mutex.withLockIfAvailable({ $0.value }) {
    use(result)
}

// CAS untuk lock-free check-and-update
let (success, _) = atomic.compareExchange(
    expected: oldValue,
    desired: newValue,
    ordering: .acquiringAndReleasing
)