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Swift Concurrency
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swift_concurrency.md

Swift Concurrency

Flavors of tasks

Type Launched by Launchable from Lifetime Cancellation Inherits from origin
async-let tasks async let async functions scoped by statement automatic prioprity, task-local values
Group tasks group.async withTaskGroup scoped by task group automatic prioprity, task-local values
Unstructured tasks Task.init anywhere unscoped Task.cancel() prioprity, task-local values, actor
Detached tasks Task.detached anywhere unscoped Task.cancel() nothing

Presrving the runtime contracts

Swift concurrency: Behind the scenes at 24:40

✅ Safe primitives ⚠️ Caution required 🚫 Unsafe Primitives
await, Actors, Task groups os_unfair_lock, NSLock in synchronus code DispatchSemaphore, pthread_cond, NSCondition, pthread_rw_lock, etc
Compiler enforced No compiler support No compiler support

WWDC

WWDC21

Platforms: iOS 15, macOS 12

WWDC22

Platforms: iOS 16, macOS 13

Conferences

Books

Podcasts

Proposals

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