Mark H Weaver <m...@netris.org> writes: > Andy Wingo <wi...@pobox.com> writes: > >> Sorry for asking a stupid question, but why is it that we want the >> gensym counter to be thread-local? Just to avoid the mutex? TBH I >> don't think it's that big of a point of contention. This risks >> devolution into bike-shed-landia tho... > > It's a reasonable question. I don't feel strongly about it, but I > prefer lock-free programming where practical, and in this case there's > really no need for coordination between threads. Indeed, these UUIDs > are already designed to avoid collisions between multiple _sessions_ > without coordination. So why bother with the lock?
To avoid both threads reading the same seed value before generating the same number? I have not looked at the code, but that could be a reason for serializing. -- David Kastrup
