public void OnError(Exception error)
{
var inner = new MaybeInnerObserver <T>(downstream);
if (Interlocked.CompareExchange(ref fallbackObserver, inner, null) == null)
{
var fb = fallback;
fallback = null;
fb.Subscribe(inner);
}
}
void Next()
{
var o = main;
main = null;
var inner = new MaybeInnerObserver <T>(downstream);
if (DisposableHelper.Replace(ref upstream, inner))
{
o.Subscribe(inner);
}
}
public void OnError(Exception error)
{
var fb = default(IMaybeSource <T>);
try
{
fb = RequireNonNullRef(handler(error), "The handler returned a null IMaybeSource");
}
catch (Exception ex)
{
downstream.OnError(new AggregateException(error, ex));
return;
}
var inner = new MaybeInnerObserver <T>(downstream);
if (Interlocked.CompareExchange(ref fallbackObserver, inner, null) == null)
{
fb.Subscribe(inner);
}
}
internal void Run()
{
if (Interlocked.CompareExchange(ref exclude, 1, 0) == 0)
{
DisposableHelper.Dispose(ref upstream);
var c = fallback;
if (c == null)
{
downstream.OnError(new TimeoutException());
}
else
{
fallback = null;
var inner = new MaybeInnerObserver <T>(downstream);
if (Interlocked.CompareExchange(ref fallbackObserver, inner, null) == null)
{
c.Subscribe(inner);
}
}
}
}
