On 04/13/2012 12:11 AM, Dag Sverre Seljebotn wrote:
Travis Oliphant recently raised the issue on the NumPy list of what
mechanisms to use to box native functions produced by his Numba so that
SciPy functions can call it, e.g. (I'm making the numba part up):
@numba # Compiles function using LLVM
def f(x):
return 3 * x
print scipy.integrate.quad(f, 1, 2) # do many callbacks natively!
Obviously, we want something standard, so that Cython functions can also
be called in a fast way.
This is very similar to CEP 523
(http://wiki.cython.org/enhancements/nativecall), but rather than
Cython-to-Cython, we want something that both SciPy, NumPy, numba,
Cython, f2py, fwrap can implement.
Here's my proposal; Travis seems happy to implement something like it
for numba and parts of SciPy:
http://wiki.cython.org/enhancements/nativecall
I'm sorry. HERE is the CEP:
http://wiki.cython.org/enhancements/cep1000
Since writing that yesterday, I've moved more in the direction of
wanting a zero-terminated list of overloads instead of providing a
count, and have the fast protocol jump over the header (since version is
available elsewhere), and just demand that the structure is
sizeof(void*)-aligned in the first place rather than the complicated
padding.
Dag
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