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Subject: Re: [boost] [any] new version
From: Kim Barrett (kab.conundrums_at_[hidden])
Date: 2011-09-05 15:08:34

On Sep 5, 2011, at 2:17 PM, Dave Abrahams wrote:
> on Mon Sep 05 2011, Mathias Gaunard <> wrote:
>> The C++11 standard (the only one aware of multithreading) mandates
>> that initialization of static variables at function scope is
>> thread-safe.
> Really? I didn't pay attention to ever twist or turn of the process of
> standardizing multithreading, but it greatly surprises me to hear that,
> because it would impose an overhead on those function-static variables
> that don't need synchronization. Can you cite the paragraphs that give
> this guarantee?

SC-22-N-411, 6.7/4 "Declaration statement" says, while discussing initialization
of an object with static storage duration the first time control passes through its

    If control enters the declaration concurrently while the object is being
    initialized, the concurrent execution shall wait for completion of the

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