private static void OnAppDomainUnhandledException(object sender, UnhandledExceptionEventArgs e)
{
if (!(e.ExceptionObject is Exception exception))
{
// while in C# what you throw must be an Exception, the CLR does not require this (see: https://stackoverflow.com/questions/913472/why-is-unhandledexceptioneventargs-exceptionobject-an-object-and-not-an-exception)
exception = new Exception($"Exception object is not an Exception! ({e.ExceptionObject?.ToString()})");
}
if (e.IsTerminating)
{
// save critical work first, hopefully handle regular events afterwards
MainEventQueue.EventHandling.Suspend();
try
{
MainEventQueue.HandleCritical(new CriticalUnhandledExceptionEvent(exception));
MoveToState(AppState.Shutdown);
}
finally
{
MainEventQueue.EventHandling.Resume();
}
}
else
{
EnqueueException(exception);
}
}
/// <summary>
/// Initializes the (Mechanical4) app.
/// </summary>
/// <param name="eventQueue">The <see cref="EventQueueBase"/> to wrap.</param>
protected static void Initialize(EventQueueBase eventQueue)
{
var wrapper = new MainEventQueue(eventQueue); // tests the argument implicitly
isInitialized.SetIfEquals(newValue: true, comparand: false, out bool oldValue);
if (oldValue)
{
throw new InvalidOperationException("The (Mechanical4) app may only be initialized once!");
}
mainEventQueue = wrapper;
InitializeUnhandledExceptionCatching();
}
internal Regular(MainEventQueue mainQueue)
{
this.mainEventQueue = mainQueue ?? throw Exc.Null(nameof(mainQueue));
}