The current threadmodule.c does not seem to correctly support multiple (sub) interpreters.
This became apparent when using jep - (a Java/Python bridge) and also seems to cause problems with mod_python. The incompatibility began in Python version 2.3.5 and has been traced to changes to the 2.4 threadmodule.c that were backported to the 2.3 delivery. A bug report was raised on 2005-03-15 (http://sourceforge.net/tracker/index.php?func=detail&aid=1163563&group_id=5470&atid=105470) which covers the problem in more detail. I've just submitted a patch (I hope it's correctly formatted) for threadmodule.c (http://sourceforge.net/tracker/index.php?func=detail&aid=1203393&group_id=5470&atid=305470) adapted from the pre-2.3.5 threadmodule.c (replacing the PyGILState_XXX calls with those from the earlier thread module). The patch works correctly but it will probably re-introduce the problem that the change for threadmodule.c version 2.59 fixed.("Fix for [ 1010677 ] thread Module Breaks PyGILState_Ensure(),and a test case.When booting a new thread, use the PyGILState API to manage the GIL."). The documentation (http://docs.python.org/api/threads.html) states "Note that the PyGILState_*() functions assume there is only one global interpreter (created automatically by Py_Initialize()). Python still supports the creation of additional interpreters (using Py_NewInterpreter()), but mixing multiple interpreters and the PyGILState_*() API is unsupported. ", so it looks like that using the PyGilState_XXX functions in the core threadmodule.c means the Py_NewInterpreter() call (i.e. multiple interpreters) is no longer supported when threads are involved. This problem is preventing us upgrading to Python 2.4 so we'd obviously like to see a resolution the next Python release if that were possible... Cheers, Max _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
