LK-Simon

import Foundation

@propertyWrapper
public struct ThreadSafe<T> {
    public var lock = DispatchSemaphore(value: 1)
    private var value: T
    
    public var wrappedValue: T {
        get {
            lock.wait()

LK-Simon

import Foundation

public protocol Observable {
    /// Registers an Observer against this Observable Type
    func addObserver<TObservationProtocol: AnyObject>(_ observer: TObservationProtocol)
    
    /// Removes an Observer from this Observable Type
    func removeObserver<TObservationProtocol: AnyObject>(_ observer: TObservationProtocol)
}

LK-Simon

import Foundation

enum MachTimerError: Error {
    case TimebaseInfoError // Only thrown where we cannot initialize the Mach Timer (shouldn't ever happen though)
}

struct MachTimer {
    // We need to know whether or not the Timer is still running or Stopped at the point of requesting a Result
    enum MachTimerState {
        case NotRunning