June 21, 2015
1:06 p.m.
Nick Coghlan schrieb am 21.06.2015 um 03:28:
* there may be restrictions on some extension modules that limit them to "main interpreter only" (e.g. if the extension module itself isn't thread-safe, then it will need to remain fully protected by the GIL)
Just an idea, but C extensions could opt-in to this. Calling into them has to go through some kind of callable type, usually PyCFunction. We could protect all calls to extension types and C functions with a global runtime lock (per process, not per interpreter) and Extensions could set a flag on their functions and methods (or get it inherited from their extension types etc.) that says "I don't need the lock". That allows for a very fine-grained transition. Stefan