Hi boosters and Tobias, I'm in search of a singleton working with multi-threading. I've tried Loki's SingletonHolder, but that one doesn't seem to work with code executed before start of main(), at least not with the ClassLevelLockable ThreadingModel, but it might as well be my bad as it's not really very well documented (I don't have an MC++D handy). Anyhow; I stumbled upon the singleton in boost vault/X-Files which felt promising after reading the docs. But it seems to also require some Boost.FunctionTypes library which seems to be kind-of-almost accepted into boost (See http://lists.boost.org/boost-announce/2005/06/0066.php). So now to my questions: * Is this singleton in vault/X-Files working and worth a try? Or is it more of a scetch or something? * If yes, how can i get a copy of its prerequisite function_types? And are there more prerequisites not in the 1.34.1 release? * Can I use the 1.34.1 boost release and patch in the needed files? * Is the singleton scheduled for a review? There really ought to be a singleton in boost! * Last resort - if this singleton isn't really usable as is, does anyone know of one that is and fits my requirements above? Thanks in advance for any answers, Johan Franzén