public void Subscribe(InputSender.TransferDelegate transfer)
{
var subscriber = new Subscriber(transfer);
if (Interlocked.CompareExchange(ref _subscriber, subscriber, null) != null)
{
throw new InvalidOperationException("MessageBody.Subscribe may only be called once");
}
var continuation = Interlocked.Exchange(ref _continuation, null);
if (continuation != null)
{
continuation.Invoke();
}
}
public Subscriber(InputSender.TransferDelegate transfer)
{
_transfer = transfer;
}
