On 13 February 2012 23:04, Antonio Cuni <anto.c...@gmail.com> wrote: > On 02/13/2012 11:26 PM, Stefan Behnel wrote: >>> >>> > Last time I looked, Cython still generates code that PyPy cannot >>> > handle: >>> > for example, it explicitly messes with tstate->curexc_type&co, >>> > Couldn't PyErr_Fetch() and PyErr_Restore() be used instead? >> >> Just two general comments on this, because these internals are really >> off-topic for this list and much better suited for the cython-dev list. >> >> 1) These things are usually done for two reasons: sometimes for better >> performance (inlining!), but also because there are cases where CPython >> fails to match its own Python-level semantics at the C-API level (simply >> because no-one else but Cython actually needs them there). So we sometimes >> end up rewriting parts of its C-API in a way that allows us to reimplement >> the correct Python semantics on top of them. > > > what about wrapping these "cython hacks" into some macros (which would be > defined only when compiling against CPython)? This way, they would still > have the same semantic/performance when compiling for CPython, but that > would still allow PyPy to implement them. > > Basically, I'm proposing to unoficially extend a bit the C API so that PyPy > and Cython can meet. I agree that in the long run this is probably not the > best solution, however it might be interesting in the short run.
That would be neat, interfacing at the C level is much easier than at a Python + ctypes level in many ways for Cython. Forgive my ignorance, but is there a complete-ish overview of which parts of the CPython C API are available? Perhaps the generated C code can also appease the GC in some way instead of refcounting the objects? As a further point of interest, is there any support for the buffer interface (PEP 3118)? On a side note, me and Dag Sverre will be at PyCon this year to attend the main conference and to do some sprinting on Cython. Perhaps we could draw up a concrete proposal that could make pypy and Cython work together. > ciao, > anto > > _______________________________________________ > pypy-dev mailing list > pypy-dev@python.org > http://mail.python.org/mailman/listinfo/pypy-dev _______________________________________________ pypy-dev mailing list pypy-dev@python.org http://mail.python.org/mailman/listinfo/pypy-dev
