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Subject: Re: [boost] [atomic] Probable documentation issue: how do weknowatomic is safe and/or efficient?
From: John Maddock (john_at_[hidden])
Date: 2013-12-24 12:17:37

>> I'm sure the answer to (a) is that it is correct, but I was surprised
>> that atomic<int> relied on the volatile modifier for thread safe
>> load/stores on MSVC, I had assumed that something more than that would
>> have been required, but I know I'm out of date on this stuff!
> "volatile" was changed in VC++ 8.0 to guarantee acquire/release semantics,
> then changed back in 2012 to only do so when /volatile:ms is active, which
> it is by default, except on ARM.

So does this mean that Boost.Atomic is perhaps not safe after all?


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