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`.
Circular imports make import pxd's order sensitive, and violating this
order results in hard to understand errors. As far as I can tell, this
rearrangement removes the circular nature, and has no other side
affects.
Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>
- Basic tests are working
- May need some adjustments to get all tests working
- Cleaned up bundling to take Python arch into account when building
with multiple architectures
This change was a bit complicated because of a bug in cython fused
types. I had to flatten DynamicStruct.Builder to DynamicStruct_Builder
in order to get fused template specialization working.
