What is the recommended way to ensure atomic execution? DispatchQueue? UnfairLock? Other locks? Other ways?
Asked on 08/08/2024
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The recommended way to ensure atomic execution in Swift, as presented at WWDC, involves using the new low-level synchronization primitives introduced in Swift 6. Specifically, the synchronization module introduces atomics and mutexes:
-
Atomics: These are generic over any type that provides an efficient, lock-free implementation on the platform. Atomic values should always be stored in
letproperties for safe concurrent access. All operations on atomics are explicit with memory ordering arguments. -
Mutexes: Similar to atomics, a mutex should be stored in a
letproperty and can be safely accessed concurrently. All accesses to the storage protected by the mutex are via the closure passed to thewithLockmethod, which ensures mutually exclusive access.
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