Re: [boost] [atomic] Probable documentation issue: how do weknowatomic is safe and/or efficient?

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 have been required, but I know I'm out of date on this stuff!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.
>
> http://msdn.microsoft.com/en-us/library/12a04hfd.aspx

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

John.