From: Yohanes Santoso <ysantoso-rubytalk@...>
Date: 2005-02-27T17:43:47+09:00
Subject: Re: assignments and thread safety

Csaba Henk <csaba@phony_for_avoiding_spam.org> writes:

> Is "$a ||= 1" thread safe? I'd guess so, as "||=" is one piece of

It is not guaranteed to be thread-safe, although in current official
ruby vm it is 'atomic'.

> Is it just an accident, or we can know somehow that this code is thread
> safe? Where do the limits of thread safety lie?

Treat it as an accident and don't depend on this behaviour. You should
synchronise access to shared resources.

> Csaba

Yours,

YS.