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Subject:	Re: Sv: Named pipes and multiple writers
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From:	Ken Brown via Cygwin <cygwin AT cygwin DOT com>
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On 3/26/2020 10:06 AM, Ken Brown via Cygwin wrote:
> [Let's keep the discussion on the list in case others have suggestions.]
> 
> On 3/25/2020 9:41 AM, sten DOT kristian DOT ivarsson AT gmail DOT com wrote:
>> [snip]
>>>> As far as I can see, reading through history, this have been a known
>>>> issue for quite some time, but it seems like there have been some
>>>> attempts to solve it, e.g. in the branch topic/fifo (by Ken Brown)
>>
>> [snip]
>>>> Does anyone have any knowledge about if this (topic/fifo branch) is
>>>> working and/or if it is somehow planned to make it into the master
>>>> branch and end up in a future release ?
>>
>>> That branch is obsolete.  Support for multiple writers was added to Cygwin
>> as of release 3.1.0.
>>
>> Ok, thanks, but we're running 3.1.4 (and tested 3.1.5) but do still have
>> problems (experiencing ENXIO (No such device or address)) but actually (as
>> far as we see) with the 3:rd writer ?
>>
>> We need to investigate the issue more thoroughly and might get back when we
>> have more knowledge
> 
> Does the ENXIO come from fhandler_fifo::wait?  If so, it's quite possible that 
> there's a bug involving read_ready in my code.

BTW, I've been working on adding support for multiple readers.  I expect to have 
a first cut ready within a week or two.  Would you have any use for that?  If 
so, I could revive the topic/fifo branch and push my patches there for you to test.

Ken
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