On 18 February 2012 at 19:11, Stefan Behnel <stefan...@behnel.de> wrote: > Stefan Behnel, 18.02.2012 09:54: >> Stefan Behnel, 15.02.2012 12:32: >>> The current state of the discussion seems to be that PyPy provides ways to >>> talk to C code, but nothing as complete as CPython's C-API in the sense >>> that it allows efficient two-way communication between C code and Python >>> objects. Thus, we need to either improve this or look for alternatives. >>> >>> In order to get us more focussed on what can be done and what the >>> implications are, so that we may eventually be able to decide what should >>> be done, I started a Wiki page for a PyPy backend CEP (Cython Enhancement >>> Proposal). >>> >>> http://wiki.cython.org/enhancements/pypy >> >> The discussion so far makes me rather certain that the most promising >> short-term solution is to make Cython generate C code that PyPy's cpyext >> can handle. This should get us a rather broad set of running code somewhat >> quickly, while requiring the least design-from-scratch type of work in a >> direction that does not yet allow us to see if it will really make existing >> code work or not. > > Update: > > Amaury Forgeot d'Arc fiddled out a couple of fixes and hacks to make it run > (although with some clear bugs in the exception handling code). There is a > Jenkins job now to (try to) run the test suite of my own branch in the > latest PyPy nightly build: > > https://sage.math.washington.edu:8091/hudson/view/dev-scoder/job/cython-scoder-pypy-nightly/ > > It currently crashes rather badly at some point, but at least it looks like > it's actually getting somewhere. >
One thing that Cython developers really need is PyPy defining a macro such as PYPY_VERSION_HEX in such a way us we can properly use conditional compilation. For example, a few days ago I was pushing PyPy fixes to Cython. I tried to use _PyLong_Sign in my patch, but the interpreter broke at runtime. This issue will be eventually fixed, I hope. Unce that happens, how can we know it is save to use the call for that pypy version and upwards? I mean, Cython should still support previous PyPy releases... -- Lisandro Dalcin ============ Research Scientist Computer, Electrical and Mathematical Sciences & Engineering (CEMSE) Numerical Porous Media Center (NumPor) King Abdullah University of Science and Technology (KAUST) http://numpor.kaust.edu.sa/ 4700 King Abdullah University of Science and Technology al-Khawarizmi Bldg (Bldg 1), Office # 4332 Thuwal 23955-6900, Kingdom of Saudi Arabia http://www.kaust.edu.sa Office Phone: +966 12 808-0459 _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
