Robert Bradshaw, 13.04.2012 21:26: > On Fri, Apr 13, 2012 at 12:15 PM, Stefan Behnel wrote: >> Stefan Behnel, 13.04.2012 07:24: >>> Dag Sverre Seljebotn, 13.04.2012 00:34: >>>> On 04/13/2012 12:11 AM, Dag Sverre Seljebotn wrote: >>>> http://wiki.cython.org/enhancements/cep1000 >>> >>> I'm all for doing something in this direction and have been hinting at it >>> on the PyPy mailing list for a while, without reaction so far. I'll trigger >>> them again, with a pointer to this discussion and the CEP. PyPy should be >>> totally interested in a generic way to do fast calls into wrapped C code in >>> general and Cython implemented functions specifically. Their JIT would then >>> look at the function at runtime and unwrap it. >> >> I just learned that the support in PyPy would be rather straight forward. >> It already supports calling native code with a known signature through >> their "rlib/libffi.py" module, > > Cool. > >> so all that remains to be done on their side >> is mapping the encoded signature to their own signature configuration. > > Or looking into borrowing theirs? (We might want more extensibility, > e.g. declaring buffer types and nogil/exception data. I assume ctypes > has a signature declaration format as well, right?)
PyPy's ctypes implementation is based on libffi. However, I think neither of the two has a declaration format (e.g. string based) other than the object based declaration notation. You basically pass them a sequence of type objects to declare the signature. That's not really easy to map to the C level - at least not efficiently... Stefan _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
