swift-actor-persistence

Thread-safe persistence in Swift is achieved using native actor isolation to serialize access to shared data, catching concurrency issues at compile time. This eliminates the need for manual synchronization with locks or DispatchQueues.

An offline-first local storage repository combines O(1) in-memory cache lookups with atomic file writes. This pattern provides fast and durable storage for user data, settings, and cached content on iOS and macOS.

Yes, Swift actors can be used for generic Codable Identifiable model types to create reusable repository implementations. This provides compile-time enforced thread safety for concurrent data access.

Manual locks or DispatchQueues are not needed for concurrent file access when using Swift's actor model. Actors handle serialized access to shared mutable state automatically, removing the risk of data races.

Atomic file writes should be used for macOS and iOS app data when you need reliable offline-first local storage. They ensure data integrity by preventing partial writes during concurrent access or unexpected failures.