AF_UNIX/SOCK_DGRAM is dropping messages

[Ken Brown]

On 8/12/2021 8:56 AM, sten.kristian.ivarsson@gmail.com wrote:
> [snip]
> 
>>> I'm going to follow up on cygwin-developers.
>>
>> Great, I'll read about it there
> 
> Does anyone know anything about the progress of this issue ?

I'm afraid there has not been any progress.  We weren't able to find a solution 
using the existing AF_UNIX implementation.

The proposed implementation based on Windows named pipes (topic/af_unix branch) 
stalled because of an issue you reported, which I referred to as a performance 
problem.  But it's a pretty severe performance problem.

An alternative proposed by Mark Geisert based on Posix message queues 
(topic/af_unix_mq branch) also has issues, which may or may not be surmountable.

Sorry I don't have better news.

Ken