Dan's thread proposal mentions: > =item Automatic PMC sharing will be provided > > When a PMC is placed into a container which is shared (including > lexical pads and global namespaces) then that PMC will automatically > be marked as shared. It is acceptable for this to trigger an > exception if for some reason a PMC should not be shared between > interpreters. > > PMCs are, by default, not shared. This avoids sharing overhead for > PMCs which are only used as temporaries and not shared. (Note that > this is dangerous, and may end up not being done, due to the sharing > of continuations)
I don't know why this is dangerous. A continuation is a data structure just like an array or a hash. When you share it, everything "inside" it gets shared, too. For a continuation, this could be an awful lot of stuff, but it's the safe way. Luke
