pycapnp/capnp/helpers/non_circular.pxd
Lasse Blaauwbroek aafec2281e Make reraise_kj_exception available to downstream
I'm using Pycapnp in a project, where we compile `.capnp` files directly to
Cython instead of using the dynamic interface (for speed). For this, we need
access to the `reraise_kj_exception` C function defined by Pycapnp. This is not
possible, because Cython does not automatically make this function available to
downstream users.

My previous solution, in #301, was rather flawed. The  file `capabilityHelper.cpp`, where
`reraise_kj_exception` is defined, was bundled into the distribution, so that
this file could be included in downstream libraries. This turns out to be a
terrible idea, because it redefines a bunch of other things like
`ReadPromiseAdapter`. For reasons not entirely clear to me, this leads to
segmentation faults. This PR revers #301.

Instead, in this PR I've made `reraise_kj_exception` a Cython-level function,
that can be used by downstream libraries. The C-level variant has been renamed
to `c_reraise_kj_exception`.
2023-11-05 13:58:13 -08:00

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Cython

from cpython.ref cimport PyObject
from libcpp cimport bool
cdef extern from "capnp/helpers/capabilityHelper.h":
void c_reraise_kj_exception()
cdef cppclass PyRefCounter:
PyRefCounter(PyObject *)
PyObject * obj