hello, we are currently working on a finite difference code using arrayfire. First benchmarks showed that for small systems the C/C++ versions seems to be significantly faster than the Python version. Therefor at least the core routines should be implemented in C/C++. On the other hand the final interface should be available in Python. We typically use Cython for that purpose and we already archive to pass arrays from C to Python and call some low-level routines using cython wrappers.

Unfortunately we are not yet able to combine the cython interface with the ctypes wrappers. Finally we would like to be able to create an array from arrayfire-python. Somehow determine the address of the C/C++ array and pass this to our cython wrappers. We tried several methods to determine the address of the underlying array, and we are quite sure that one of these versions should give the correct address, but we still get the following error:

terminate called after throwing an instance of 'af::exception'
  what():  ArrayFire Exception (Unknown error:208):
In function const ArrayInfo& getInfo(af_array, bool, bool)
In file src/api/c/array.cpp:30
Input Array not created on current device

In function void af::print(const char*, const af::array&)
In file src/api/cpp/util.cpp:21
Aborted

It looks like that there are two "instances" of arrayfire which do not work together!? Does anybody have experience with arrayfire and cython? any ideas how to debug such a problem?

thanks for any suggestion
Florian