From: Robert Klemme <shortcutter@...>
Date: 2012-06-11T16:52:47+09:00
Subject: Re: Is "a,b=c,d" atomic? or do I need a Mutex?

On Sun, Jun 10, 2012 at 7:52 PM, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> 2012/6/10 Bartosz Dziewoński <matma.rex@gmail.com>:
>> It is atomic on MRI. It may or may not be on other interpreters, if
>> you care about them. (But probably should be as an element of the
>> syntax.)
>>
>> Array#<< may or may not be atomic as well. (It is on MRI.)
>
> Thanks, so I've no problem since I'm coding for MRI.

Sorry, but I think this is the wrong attitude.  Even MRI's
implementation can change and the default should be to properly
synchronize access to shared resources - if only for documenting the
shared access.  Note also that multiple threads may invoke #method2
which makes synchronization necessary even in absence of swapping.

Kind regards

robert

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