what is actor isolation

Actor isolation in Swift is a concurrency feature that helps manage access to shared mutable state. Actors are similar to classes in that they are reference types, but they automatically protect their state by serializing accesses. This means that only a single task is allowed to execute at a time on an actor, which helps prevent data races and ensures thread safety.

Here are some key points about actor isolation:

Serialization of Accesses: Actors serialize access to their state, ensuring that only one task can interact with the actor's state at a time. This prevents concurrent access issues.
Asynchronous Calls: Calls to actor methods from outside the context of the actor are asynchronous. This means you need to use the await keyword when calling these methods.
Isolation Guarantees: Swift allows you to specify isolation guarantees for callbacks and delegate protocols. For example, you can annotate a delegate protocol to always be called on the main actor, ensuring that the receiver of the callback can rely on this guarantee.

For more detailed information, you can refer to the session Migrate your app to Swift 6 which discusses actor isolation and related concurrency features in Swift 6.

what is actor isolation

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