pass numpy-object into C modules via cython

clistup.c

#include <stdio.h>

void listup(int *array, int size)
{
	int i;
	for(i = 0; i < size; i++) {
		printf("%d\n", *(array + i));
	}
}

clistup.h

void listup(int *array, int size);

compile.sh

python setup.py build_ext --inplace

listup.pyx

import numpy as np
cimport numpy as np

cdef extern from "clistup.h":
    void listup(int*,int)

cdef call_org_listup(np.ndarray py_array):
    cdef int *int_array = <int*>py_array.data
    cdef int length = len(py_array)
    listup(int_array,length)

def listup_array(np_array):
    call_org_listup(np_array)

sample.py

import numpy as np
import Listup

zero_array = np.zeros(5)

Listup.listup_array(zero_array)

print "=================================="
ar2 = np.array([1000, 1000, 1200, 1500], np.int32)

Listup.listup_array(ar2)

setup.py

from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext 

import numpy
source = ['./clistup.c', './listup.pyx']

# mac XXX ここは環境に合わせて変える
numpy_include = ['/System/Library/Frameworks/Python.framework/Versions/Current/Extras/lib/python/numpy/core/include']

setup(
    cmdclass = dict(build_ext = build_ext),
    ext_modules = [
        Extension(
            'Listup',
            source,
            include_dirs = numpy_include,
        )
    ]
)