Hey Wes,

I don't have much experience doing C + Python + Cython development, so I am
probably missing something obvious, but reading the Cython docs,
seems like I can only access types marked as public from C code. When I
compile arrow locally, I do get some C++ headers for the plasma code, but I
don't think I can use them from C code either.


On Tue, Mar 6, 2018 at 3:12 PM Wes McKinney <wesmck...@gmail.com> wrote:

> hi Saul,
> Are you able to use the buffer/memoryview protocol? Instances of
> pyarrow.Buffer, like PlasmaBuffer, support this
> https://github.com/apache/arrow/blob/master/python/pyarrow/plasma.pyx#L182
> - Wes
> On Tue, Mar 6, 2018 at 3:09 PM, Saul Shanabrook <s.shanabr...@gmail.com>
> wrote:
> > I am trying to use the Plasma store to back xnd objects. Xnd (
> > https://xnd.readthedocs.io/en/latest/xnd/index.html) is a container
> library
> > in C that has Python bindings. I would like to get a pointer to the
> > allocated memory after creating or get an object in Plasma. I see that
> this
> > is supported in the C++ API (
> >
> https://arrow.apache.org/docs/cpp/classplasma_1_1_plasma_client.html#ac18ab9cc792c620a97a3dcb165e0ecd7
> )
> > but not in the python API (as far as I can tell). Is it possible to use
> the
> > C++ Plasma API from a C project? If not, would it make sense to expose
> > pointer access on the Python API using capsules
> > https://docs.python.org/3.6/c-api/capsule.html
> > <https://docs.python.org/3.6/c-api/capsule.html#capsules>?

Reply via email to