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Re: [Nmh-workers] Locking In Scripts and nmh Locking

From: Ken Hornstein
Subject: Re: [Nmh-workers] Locking In Scripts and nmh Locking
Date: Tue, 01 May 2012 15:43:55 -0400

>>But then you say (in another message) that you want nmh programs to not
>>deadlock under our hypothetical nmhlock program
>If I said something that amounted to that, it's not what I meant. I don't know
>what I might have said that led you to believe that's what I meant. Which is 
>to say that, in my confusion, I said nothing that amounted to that.

I guess I was thinking that based on this message:


I mean, why would you want nmh programs to not deadlock under mhlock unless
you wanted to run them?  That's where things get tricky.

>I also admit that I don't understand why nmh locking has to be so complicated,
>but I leave that issue to my betters.

Well, it's just as complicated as it needs to be.  The issue is that the
sequences files and context files get modified a lot, so those need to
be locked.  And (generally) sequence files are per-folder.  So I'm not
sure how you could make locking work and not make any simpler than
it is now (unless you wanted to do the equivalent of a biglock; we don't
want that, do we?).


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