Property wrapper for atomic modifications

Atomic.swift

/// Property wrapper for atomic modifications
@propertyWrapper
public struct Atomic<T> {
    private var value: T
    private let lock = NSLock()

    public init(wrappedValue value: T) {
        self.value = value
    }

    public var wrappedValue: T {
        get {
            return load()
        }
        set {
            store(newValue: newValue)
        }
    }

    func load() -> T {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }

    mutating func store(newValue: T) {
        lock.lock()
        defer {
            lock.unlock()
        }
        value = newValue
    }
}