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Subject: Re: [boost] [thread] thread-safe static local
From: Phil Endecott (spam_from_boost_dev_at_[hidden])
Date: 2009-03-03 18:11:48

Othman, Ossama wrote:
>> As you may know, gcc creates local statics that are thread safe by
>> default.

> Is there a way to reliably determine if the gcc's thread-safe local
> statics are enabled?

No, last time I looked there didn't seem to be anything.
IIRC there's also no way to enable/disable it for individual variables
using attributes.

> If not, multithreaded library code that relies on that feature, for example,
> should hide static locals inside an out-of-line function/method in the odd
> event users of the library disable gcc's thread safe local statics for their
> own code through the '-fno-threadsafe-statics' command line option.

Yes, you need to do something like this if you can't require users to
use the default setting.


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