Synchronized.swift

import Foundation

public struct Synchronized<Value> {
    
    fileprivate let accessQueue: DispatchQueue
    fileprivate var value: Value
    
    public init(_ value: Value, queueLabel: String = "\(Value.self)SynchronizedQueue") {
        self.value = value
        self.accessQueue = DispatchQueue(label: queueLabel)
    }
    
    public func get() -> Value {
        return accessQueue.sync(execute: { return value })
    }
    
    public mutating func set(_ value: Value) {
        accessQueue.sync {
            self.value = value
        }
    }
    
    public mutating func set(_ change: (inout Value) -> ()) {
        accessQueue.sync {
            change(&value)
        }
    }

}