swift-concurrency

To fix data races in Swift, use actors to isolate shared mutable state and add Sendable conformance to safely pass data across concurrent tasks. This prevents thread safety issues and concurrent access violations.

Migrating legacy callback-based code to Swift async/await requires refactoring closures into async functions and using tasks to bridge asynchronous operations. This modernization improves code readability and error handling.

Use @MainActor in Swift concurrency to isolate UI updates and ensure tasks execute on the main thread. It prevents data races when updating shared state and maintains thread safety for user interface operations.

Swift 6 enforces strict Sendable conformance and actor isolation at compile time to eliminate data races. This migration requires explicit annotations to ensure safe concurrent code execution across asynchronous tasks.

Sendable warnings occur when passing non-Sendable closures between Swift concurrent tasks. Resolve these by making types Sendable, using actors for isolation, or refactoring closures to async/await for safe cross-task data sharing.