I tried both, I ended up doing Serge's, as it makes code easier

Thanks,
Jacek


On 05/07/2015 11:42 PM, Mueller, Fritz wrote:
> See also call_once(), Stroustrup 4e 42.3.3...
>
>> On May 7, 2015, at 10:59 PM, Serge Monkewitz <[log in to unmask]
>> <mailto:[log in to unmask]>> wrote:
>>
>> I believe the intent is to make sure that the local static Config (in
>> getConfigHelper()) is initialized in a thread safe way (i.e. 2 threads
>> don’t both try to call the constructor). In C++03, that isn’t actually
>> guaranteed, but in C++11, it is (see e.g.
>> http://stackoverflow.com/questions/8102125/is-local-static-variable-initialization-thread-safe-in-c11)
>>
>>
>> I think what you should do is remove configHelperFla,
>> getConfigHelper() and callOnceHelper(), and change getConfig() to read:
>>
>> Config & getConfig() {
>>     static Config c;
>>     return c;
>> }
>>
>>> On May 7, 2015, at 10:12 PM, Jacek Becla <[log in to unmask]
>>> <mailto:[log in to unmask]>> wrote:
>>>
>>> I'd also welcome help with migrating this line:
>>>
>>> boost::once_flag configHelperFlag = BOOST_ONCE_INIT;
>>>
>>> (it is in core/modules/wconfig/Config.cc <http://config.cc/>)
>>>
>>> std does not have equivalent, so it is a bit
>>> unclear how to migrate it (to me anyway)
>>>
>>> Related reading
>>> http://stackoverflow.com/questions/4200813/stdonce-flag-equivalent-of-boost-once-init
>>>
>>> Jacek
>>>
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