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 >>> >>> ######################################################################## >>> Use REPLY-ALL to reply to list >>> >>> To unsubscribe from the QSERV-L list, click the following link: >>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1 >> >> >> ------------------------------------------------------------------------ >> >> Use REPLY-ALL to reply to list >> >> To unsubscribe from the QSERV-L list, click the following link: >> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1 >> > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1