On Friday, May 13, 2016 at 2:04:53 AM UTC+2, Sturla Molden wrote:
> You must own the GIL before you can safely use the Python C API, object
> creation and refcounting in particular. Use the "Simplified GIL API" to
> grab the GIL and release it when you are done.
I've now read about the GIL and it looks like I am in deep problems.
I've added the GILState lock to the threaded loop like this:
#pragma omp parallel for
for( int i = 0; i < 10; i++ ){
PyGILState_STATE gstate;
gstate = PyGILState_Ensure();
PyObject *ret = PyObject_CallMethod( mult_obj, "do_multiply", "i", i );
if( !ret ){
printf("Cannot call 'do_multiply'\n");
continue;
}
printf("The value calculated in Python was: %3d\n", (int)
PyLong_AsLong(ret));
Py_DECREF(ret);
PyGILState_Release(gstate);
}
.... but still no success. Have I done it right?
regs,
-Øystein
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