Need some help with Python/C api and threading
steve.menard at videotron.ca
Wed Jun 16 21:30:43 CEST 2004
Here is my problem.
I have this library thats hosts another language within python, and
allows that language to call back INTO python.
All is good as long as the other languages calls back on the same
thread. If the callback arrives on a different thread, all hell break
loose and the program dies horribly.
looking at the C api documentation, I came upon the following block of
/* interp is your reference to an interpreter object. */
tstate = PyThreadState_New(interp);
/* Perform Python actions here. */
result = CallSomeFunction();
/* evaluate result */
/* Release the thread. No Python API allowed beyond this point. */
/* You can either delete the thread state, or save it
until you need it the next time. */
Which would seem to be what I need. However, I have no idea how to get
at that interp pointer. I tried the following :
PyInterpreterState* interp = PyInterpreterState_New();
PyThreadState *tstate = PyThreadState_New(interp);
but then it crashes on the second line ...
Anybody ever done this? As a side note, the hosted language can start an
arbitrary number of threads ...
More information about the Python-list