Actors

In the last posts we looked at running work in parallel with async let and TaskGroup, and then how Sendable ensures the data we share across tasks is safe. The next piece of Swift’s structured concurrency story is actors. Actors provide isolation for mutable state, making them one of the core building blocks for avoiding data races. What is an Actor? An actor is like a class, but with one key difference: only one task at a time can interact with its mutable state. This guarantees thread safety without you having to add locks manually. ...