AllocatedLock is a lightweight cross platform lock with an API compatible with OSAllocatedUnfairLock available in macOS Ventura, iOS 16 and later. The lock wraps os_unfair_lock_t on Darwin platforms and pthread_mutex_t on Linux.

AllocatedLock can be installed by using Swift Package Manager.

Note: AllocatedLock requires Swift 5.5 on Xcode 14+. It runs on iOS 13+, tvOS 13+, macOS 10.15+ and Linux.

To install using Swift Package Manager, add this to the dependencies: section in your Package.swift file:

.package(url: "https://github.com/swhitty/AllocatedLock.git", .upToNextMajor(from: "0.0.1"))

Usage is similar with OSAllocatedUnfairLock.

The recommended usage to create a lock that protects some state:

let state = AllocatedLock<Int>(initialState: 0)

Use .withLock to acquire the lock to read the state:

let val = state.withLock { $0 }

Or mutate the state

let val = state.withLock { $0 += 1 }

AllocatedLock is primarily the work of Simon Whitty.

(Full list of contributors)