custom transport receiving issues

Hi,

I’m trying to write a custom transport which works over a character device (in this case a serial port exposed by qemu into windows). The basic idea here is that I need to use CreateFile/ReadFile/WriteFile to transfer data over a “file” provided by the driver. In order to work with the file it has to be opened in “overlapped” mode, and by nature reads and write are asynchronous. I’ve implemented all of this wrapped in a Stream subclass, for writes I just send-and-forget, whereas for reads I have an internal long running Task which reads from the file periodically and buffers the results to an internal circular buffer.

For the past hour I’ve been scratching my head because my custom transport was throwing an ObjectDisposedException and I couldn’t for the life of my figure out where I had screwed the code up. It finally occurred to me to check the source for this library and I found the following: https://github.com/Azure/amqpnetlite/blob/master/src/Framing/Reader.cs#L56. What I think is happening is that AMQP.Net Lite is trying to make a read before the internal thread has picked up any response, getting a read size of 0 and throwing the ObjectDisposedException. I’m not sure how to get around this problem, so any help would be welcome!

Are there any specific notes on requirements for implementing a custom transport?

UPDATE: I should have mentioned this is being implemented against .NET 4.0

[mbroadst]

@xinchen10

Custom transport communicating over a virtio-serial port in windows on the right side. A small proxy I wrote using amqp10 in node.js on the top left, which proxies to a local qpidd instance. Bottom left is a listener using amq10 again to receive messages off the amq.topic exchange. Looks like the experiment worked 😃

[mbroadst]

I’m definitely willing to contribute code to that, this stuff is by no means proprietary or otherwise encumbered. Plus, I’d appreciate if someone who knows C# better than I would look it over for obvious inefficiencies 😄