swift-concurrency

Migrate from GCD to Swift Concurrency by replacing dispatch queues with structured concurrency patterns, utilizing async/await, Task groups, and actors to manage background tasks safely. This migration reduces data races and deadlocks while adopting Swift 6.2 approachable concurrency patterns.

Handle shared mutable state safely in Swift by using actor isolation and custom actors. Actors serialize access to their mutable state, preventing data races and deadlocks across UI code and background tasks without needing manual locking mechanisms.

Use @MainActor to confine UI updates to the main thread and Sendable types to safely pass data across concurrent tasks. This combination ensures safe concurrent execution and aligns with main-actor-by-default patterns in Swift 6.2.

Structured concurrency in Swift handles Task cancellation by propagating cancellation signals through Task groups and child tasks. You must check for cancellation within your async workflows to stop ongoing operations cleanly and avoid unnecessary background work.

Yes, you can receive code review guidance for Swift concurrency safety checks. The approach focuses on reviewing async patterns, actor isolation, and Sendable conformance to reduce concurrency-related bugs during phase-based development.

Swift Concurrency migration causes Sendable conformance errors when non-Sendable types cross actor isolation boundaries or concurrent contexts. You must ensure shared types conform to Sendable or use nonisolated functions to resolve these safety violations.