Re: [9fans] Fwd: lib9p: Add clunk callback to Srv struct

[Tiago Natel <tiago.natel@neoway.com.br>]

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2016-02-01 20:03 GMT-02:00 <cinap_lenrek@felloff.net>:

> > Is there a reason why lib9p doesn't have a clunk function pointer in Srv
> struct?
>
> what about Srv.destroyfid()?
>
>           Destroyfid
>                When a Fid's reference count drops to zero (i.e., it
>                has been clunked and there are no outstanding requests
>                referring to it), destroyfid is called to allow the
>                program to dispose of the fid->aux pointer.
>
>
Thanks for your help! I'd tried using destroyfid to achieve what I need but
failed. I tried today again implement with destroyfid but realized that it
will not fully support what I need.

I'm using a file server for exchange data between 9P clients. When a new
file is created, I create a plan9 channel and two threads (one for handle
reads and other for writes), a write(2) to the file is translated into a
sendp and a read(2) is translated into a recvp on the channel. The channel
could be buffered or not, and then I want to maintain data allocated (aux
related data) anyway, because the file server is a queueing system when
channel have a buffer bigger than zero.

Apart from that, I want to know how many clients have each file opened to
update my stats file. It's possible in any way without a clunk callback?

I'm trying to replace a rabbitmq server with this system, but I have a
requirement for some way of monitoring of queues size, performance of
channels, number of clients connected to each channel (file on dchan), etc,
I need this kind of information for make a comparison with the current
queue system...

Thanks!

--
> cinap
>
>

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