SPUG: Does tie() do file-locking?

[Christopher Maujean]

Probably wouldn't take much to subclass the DB_File class and make a
Locking_DB_File tie...

-----Original Message-----
From: Tim Maher/CONSULTIX [mailto:tim at consultix-inc.com]
Sent: Wednesday, June 14, 2000 11:29 AM
To: spug-list at pm.org
Subject: RE: SPUG: Does tie() do file-locking?


>Tim,

>Camel p155 (dbmopen) says something about this. Not a lot, but hope it
>helps.

>Brian

Aha!  p. 155 points me to p. 392-393 for details on DB_File, where
there's an example showing how you can lock the tied-hash's entire file.

The upshot is that all you have to do is toggle whole-file locks before
and after every modification to your tied-hash and you can feel safe
(Unfortunately, doing so completely shatters the illusion that you're
dealing with a hash!)

I was hoping for something more automatic and sophisticated than this. . .
Since the DB_File module knows as well as I do when I'm changing the hash,
why can't I just tell it to do the locking for me?

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