public static EventSubscriptionToken FromEvent(
Action <EventHandler> addHandler,
Action <EventHandler> removeHandler,
EventHandler handler,
HandlerThreadOption threadOption)
{
var threadSpecificHandler = GetHandler(handler, threadOption);
addHandler(threadSpecificHandler);
return(new EventSubscriptionToken(() => removeHandler(threadSpecificHandler)));
}
private static EventHandler GetHandler(EventHandler handler, HandlerThreadOption threadOption)
{
switch (threadOption)
{
case HandlerThreadOption.PublisherThread:
return(handler);
case HandlerThreadOption.SubscriberThread:
return(GetCurrentThreadExecutionStrategy(handler));
case HandlerThreadOption.BackgroundThread:
return(GetBackgroundThreadExecutionStrategy(handler));
default:
throw new ArgumentOutOfRangeException("threadOption");
}
}