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From: Paul Rubin <no.email@nospam.invalid>
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Subject: Re: Unfeasible?
Date: Fri, 04 Dec 2015 21:13:42 -0800
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Julian Fondren <julian.fondren@gmail.com> writes:
> Then I got into the industry and it's CGI-handled PHP from one
> horizon to the other.

Typically it's mod_php in apache or php/fastcgi in nginx.

>> flock(2) ?
> Nah.  Linux is available.

Ok, what do you have in mind?  I do have some vague memory of a new
kernel service to deliver sequence numbers, but can't find any info and
might be imagining it.

I guess you could use mmap or shm with appropriate protection but that's
not a lot different from using flock.