Re: [boost] [thread] thread-safe static local

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.

Phil.