[singleton/function_types] How to get and try out?
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
Replied off-list, yesterday. Forwarding to the (slightly edited) message to the list: Johan Franzén wrote:
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).
FunctionTypes is a boost library now. It will be part of Boost 1.35. http://www.boost.org/more/formal_review_schedule.html
So now to my questions:
* Is this singleton in vault/X-Files working and worth a try?
Yes, I hope so (the test suite is known to pass with MacOS X / GCC4 and Vista / MSVC8). 'thread_specific_singleton' is currently not working reliable with some platforms because of (what seems to be) a bug in Boost.Thread.
Or is it more of a scetch or something?
No it's finished, but it's pretty new, still. BTW: For this reason I'd be thankful for some feedback :-).
* If yes, how can i get a copy of its prerequisite function_types?
I've just uploaded a backport to Boost 1.34 to the vault: http://tinyurl.com/qaf5f
And are there more prerequisites not in the 1.34.1 release?
No.
* Can I use the 1.34.1 boost release and patch in the needed files?
Yes.
* Is the singleton scheduled for a review? There really ought to be a singleton in boost!
Planned to be scheduled for review.
* Last resort - if this singleton isn't really usable as is, does anyone know of one that is and fits my requirements above?
The only ones I can currently think of are those in Loki... Regards, Tobias
participants (2)
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Johan Franzén -
Tobias Schwinger