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NNTP-Posting-Date: Tue, 17 Jan 2012 16:55:09 -0600
Date: Tue, 17 Jan 2012 14:55:04 -0800
From: Patricia Shanahan <pats@acm.org>
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Subject: Re: Volatile happens before question
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On 1/17/2012 12:09 PM, markspace wrote:
> On 1/17/2012 11:06 AM, Daniel Pitts wrote:
...
>> If b=1, that means a MUST be true.
>
> No, if b = 1, it could just be a random value made up by the CPU.

That is one of the few behaviors that is specifically excluded. "Each
read sees a write to the same variable in the execution.",
http://java.sun.com/docs/books/jls/third_edition/html/memory.html#17.4.7

Patricia