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, <https://cython.readthedocs.io/en/latest/src/userguide/external_C_code.html#public-declarations> it 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.
Best, Saul 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>? >