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- Subject: Re: Multi-thread Semantics (Re: Selenophobia)
- From: Philipp Janda <siffiejoe@...>
- Date: Sun, 2 Apr 2017 13:55:03 +0200
Am 02.04.2017 um 12:56 schröbte steve donovan:
No reason why shared references to _user data_ could not be allowed,
although of course they need to be protected by a mutex. I like the
Rust approach, where you temporally get a mutable reference and
promise to give it back quickly
You would have to prevent them from being garbage-collected as well, and
lua_close() is forbidden until all userdatas from a particular Lua state
aren't used in other states anymore. Doable? Sure. But rather complicated.
Same goes for general tables and closures. You can get 95% right easily,
but the last 5% can drive you crazy. So I'm fine with threading
libraries drawing the line at primitive values (and maybe
arrays/dictionaries of primitive values).