From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-10-25T06:32:06+09:00
Subject: Re: File#flock as a cross-process mutex

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On 10/24/06, ara.t.howard@noaa.gov <ara.t.howard@noaa.gov> wrote:
>
> On Wed, 25 Oct 2006, Francis Cianfrocca wrote:
>
> > Has anyone wrapped up File#flock so it can used as a
> platform-independent
> > cross-process mutex? (I'm getting tired of writing the same code into
> every
> > app I do.) Or does anyone have a better idea?
>
> can you elaborate?  do you need to yield the resource and re-aquire it?



Most of the time I want to make sure only one process is running in a
particular directory at a time. And if another one tries to start up, it
should get an exception. And I also want it to be completely behaved in the
presence of both hangs and crashes. Sometimes I do need to yield and
re-acquire, but I'm not looking for condition variables, just mutual
exclusion.

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