From: Jamie Lokier <lk@tantalophile.demon.co.uk>
Date: Fri, 12 Apr 2002 22:22:52 +0100
I'm not advocating more locking in read() -- there's no need, and it is
quite important that it is fast! But I would very much appreciate an
understanding of the rules that relate reading, writing and truncating
processes. How much ordering & atomicity can I depend on? Anything at all?
Basically none it appears :-)
If you need to depend upon a consistent snapshot of what some other
thread writes into a file, you must have some locking protocol to use
to synchronize with that other thread.
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