Jack Diederich wrote: > On Fri, Aug 18, 2006 at 02:21:40PM -0700, Bryan wrote: >> i've written a program that uses python c api code that lives in a >> shared library that is loaded by a custom apache module (mod_xxx). this >> python c api code all works correctly under our test server and under >> apache but only if mod_python isn't loaded. when apache loads >> mod_python as shown in the http.conf snippet below, >> PyThreadState_Swap(NULL) in mod_xxx returns NULL. when the snippet of >> code in http.conf is commented out, it works again. what do i have to >> do to have mod_xxx code work correctly when apache loads mod_python? >> >> >> failure case when apache loads mod_python: >> Py_Initialize() succeeded >> PyThreadState_Swap(NULL) failed >> >> >> sucess case when apache doesn't load mod_python: >> Py_Initialize() succeeded >> PyThreadState_Swap(NULL) succeeded >> > > Running multiple python interpreters in the same process isn't supported. > It works OK for most things but some low-level guts are shared between > interpreters so it is possible to run into trouble. > > You aren't running multiple interpreters in the same process. You and > mod_python both think you are in charge and end up nuking each other's > states. Py_Initialize() resets the global state and shouldn't be called > more than once. You can create more than one sub-interpreter (check out > the mod_python source for how, the source is small and readable). > > The best thing to do would be to load your module last and conitionally > call Py_Initialize() if someone else hasn't already. > > -Jack
thanks for replying jack. i tested what you suggested. i put our module after mod_python, commented out Py_Initialize(), and Py_IsInitialized() returned True, but PyThreadState_Swap() failed. i put our module before mod_python, called Py_Initialize(), and Py_IsInitialized() returned True, but PyThreadState_Swap() failed. i removed mod_python and our module succeeded. i even tested combinations of calling and PyEval_InitThreads() but didn't work either. bryan -- http://mail.python.org/mailman/listinfo/python-list
