I get the distinct impression from the question that the intention is to leave the web server on the Windows 98 machine hence my recommendation to either start using Win32 locking or get a better operating system. A basic assumption of server-side programming is that locking is of paramount importance so this isn't a problem firebird34 can dodge.

__SIG__
use B;
printf "You are here %08x\n", unpack "L!", unpack "P4", pack
  "L!", B::svref_2object(sub{})->OUTSIDE;
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