Allocated Unfair Lock Shim

Shims OSAllocatedUnfairLock in a struct AllocatedUnfairLock for the following platforms:

• .macOS 10.15+
• .iOS 13+
• .tvOS 13+
• .watchOS 6+

This package might also be of use when Swift 6's Mutex is unavailable.

Usage example

1. Add the following dependency to your Package.swift file:

    .package(url: "https://github.com/Akazm/allocated-unfair-lock", from: "1.2.0")

2. Add AllocatedUnfairLockShim to the target dependencies.

3. AllocatedUnfairLock should be available within your project.

import AllocatedUnfairLockShim

let myLock: AllocatedUnfairLock<Int> = AllocatedUnfairLock(initialState: 20)

/*
Happy locking on older platforms! 

For API reference, see https://developer.apple.com/documentation/os/osallocatedunfairlock
*/

AllocatedUnfairLock automatically falls back to lower level C-APIs (os_unfair_lock et. al) in case the requirements for OSAllocatedUnfairLock are not satisfied for your current target.