Hi,
I'm looking for someone familiar enough with the RCS/CMS/NML subsystem.
I'm looking for a way to implement the observer pattern so, what I'd need is a
way to register some callback function(s) when shared memory is written.
This is where I'm starting from :
[17:54] <alex_joni> in cms/cms_in.cc
[17:55] <alex_joni> you can probably (somehow) add your callback there
[17:55] <alex_joni> the write_raw gets called when a new function gets written
to the unbuffered channel
[17:55] <alex_joni> and queue_write_raw gets called for buffered channels
It appears that the
CMS_STATUS CMS::write_XXX
family of function would be the right places to add a callbacks queue, but I
still don't know what to do with queued writes, I'll continue to investigate.
Also, I'm looking for a good place in the server to execute my callbacks, when
idle for instance. I don't want the write function to wait for my callback to
return, which would slow down the server.
At worst I'll spawn a thread, but that means semaphores, so I'd rather used an
existing facility.
Any other input would be welcome
Thank you,
(I'm still working on a PyQ4t-based gui project, it is going on well, but
poll-based refresh is a no go for a project which main intent is a cleaner
design.)
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