If I make %status a shared variable, then all the status response messages go away,

Now you're cookin' on gas :)

Question: Do the shared variables and queues need locking?

Shared variables do. Queues don't.

(Or rather, they do as they are actually just shared arrays under the covers, but all the required locking is taken care of under those same covers, so you do not need to do it yourself.)

With regard to atomicity on a single-cpu system. Do not rely on it. Applying locks is very easy and not worth skipping for anything more important than trivial experiments.

there's a lot of complicated logic that would simply go away.

Indeed. The benefits of shared state and linear code flows.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^5: Win32 - flock() not FIFO? by BrowserUk
in thread Win32 - flock() not FIFO? by hennesse

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