A type for propagating an unmanaged object reference.
SDK
Framework
@frozen struct Unmanaged<Instance> where Instance : AnyObject
When you use this type, you become partially responsible for keeping the object alive.
func autorelease() -> Unmanaged<Instance>Performs an unbalanced autorelease of the object.
func release()Performs an unbalanced release of the object.
func retain() -> Unmanaged<Instance>Performs an unbalanced retain of the object.
func takeRetainedValue () -> InstanceGets the value of this unmanaged reference as a managed reference and consumes an unbalanced retain of it.
func takeUnretainedValue () -> InstanceGets the value of this unmanaged reference as a managed reference without consuming an unbalanced retain of it.
func toOpaque () -> UnsafeMutableRawPointer Unsafely converts an unmanaged class reference to a pointer.
static func fromOpaque (UnsafeRawPointer) -> Unmanaged<Instance> Unsafely turns an opaque C pointer into an unmanaged class reference.
static func passRetained (Instance) -> Unmanaged<Instance>Creates an unmanaged reference with an unbalanced retain.
static func passUnretained (Instance) -> Unmanaged<Instance>Creates an unmanaged reference without performing an unbalanced retain.
func withExtendedLifetime <T, Result>(T, (T) -> Result) -> ResultEvaluates a closure while ensuring that the given instance is not destroyed before the closure returns.
func withExtendedLifetime <T, Result>(T, () -> Result) -> ResultEvaluates a closure while ensuring that the given instance is not destroyed before the closure returns.