actor isolation
An actor protects its mutable state through an isolation boundary.
Use this when Concurrent Swift tasks read and write the same mutable object.
without the term
“Swift is warning about data races because several tasks read and write the same cache object. Can you make access to it safe without just slapping @MainActor on everything?”
with the term · How do you ask a model for actor isolation?
Put this shared mutable state behind actor isolation. Remove unsynchronized access and review invariants across every await.
What is actor isolation?
Actor-isolated state is accessed according to the actor’s executor and isolation rules, preventing unsynchronized access to that state.
Why does actor isolation matter when vibe coding?
Adding async does not by itself make shared mutable state safe.
How do you do actor isolation?
Give the state one isolation owner and expose operations through it. Check assumptions across suspension points.
What goes wrong with actor isolation?
Assuming actor isolation makes a multi-step operation atomic across await.