public void OnSubscribe(IDisposable d)
{
upstream = d as IFuseableDisposable <T>;
if (upstream != null)
{
try
{
var m = upstream.RequestFusion(boundary ? FusionSupport.AnyBoundary : FusionSupport.Any);
if (m != FusionSupport.None)
{
upstream.IsEmpty();
upstream.TryPoll(out var _);
upstream.Clear();
upstream.IsEmpty();
upstream.TryPoll(out var _);
try
{
upstream.TryOffer(default(T));
}
catch (InvalidOperationException)
{
// expected
}
}
}
catch (Exception ex)
{
error = ex;
}
}
else
{
error = new Exception("Upstream not fuseable");
}
}
public void Clear()
{
queue.Clear();
}