A PoC highlighting that ManageAtomicLazyRef solves rentrancy problems with naive solution to Asyncronously initialized shared actor as presented here in Swift Forum Thread
Use ManagedAtomicLazyReference inside of swift-atomics
/// An actor protecting a mutable `value: Value` which is typically a struct, that has to
/// be asyncrounsly created initially
public final actor AsyncInitSharedStoreActor {
/// Swift Atomics
private static let managedAtomicLazyRef = ManagedAtomicLazyReference<AsyncInitSharedStoreActor>()
/// Some protected value, typically a struct
private var value: Value
private init() async {
/// Typically reading `value` from Keychain or some other async storage
self.value = await someMethodWhichMustBeAsync()
}
}
extension AsyncInitSharedStoreActor {
public static func shared() async -> AsyncInitSharedStoreActor {
await managedAtomicLazyRef.storeIfNilThenLoad(AsyncInitSharedStoreActor())
}
public func get() async -> Value {
value
}
public func update(_ value: Value) async {
self.value = value
}
}