[Quantlib-dev] Poll: Remove support for sessionId()

[Peter C. <pca...@gm...>]

Hi all

When QuantLib is built with enabled QL_ENABLE_SESSIONS, users have to
provide an implementation of sessionId(). Usually the sessions are
used to enable thread-local singleton instances and consequently
sessionId() will be implemented such that the current thread id is
returned. More recent versions of QuantLib require C++11 as the
minimum language standard and with that we are able to simplify the
singleton implementation while always ensuring a thread-safe
initialization of singleton instances. The proposed change is this

https://github.com/lballabio/QuantLib/pull/1377

and comes with a removal of the sessionId() and a hard-wired
assumption that there is a 1:1 relation between sessions and threads.
The question for you is whether there are other uses of sessions out
there which wouldn't be supported after the above change, i.e. where
you use sessions differently from what I described above.

Thanks
Peter