UnsafeAtomicLazyReference

These values can be set (initialized) exactly once, but read many times.

Related Types

• typealias Value

  The value logically stored in an atomic lazy reference value.

Initializers

• init(at: UnsafeMutablePointer<UnsafeAtomicLazyReference<Instance>.Storage>)

  Initialize an unsafe atomic lazy reference that uses the supplied memory location for storage. The storage location must already be initialized to represent a valid atomic value.

Shorthand Methods for Dynamically Allocating Storage

• static func create() -> UnsafeAtomicLazyReference<Instance>

  Create a new UnsafeAtomicLazyReference value by dynamically allocating storage for it.

• func destroy() -> UnsafeAtomicLazyReference<Instance>.Value

  Disposes of the current value of the storage location corresponding to this unsafe atomic lazy reference, then deinitializes and deallocates the storage.

Atomic Operations

• func load() -> Instance?

  Atomically loads and returns the current value of this reference.

• func storeIfNilThenLoad(Instance) -> Instance

  Atomically initializes this reference if its current value is nil, then returns the initialized value. If this reference is already initialized, then storeIfNilThenLoad(_:) discards its supplied argument and returns the current value without updating it.