PYTHON setup.py build_ext --inplace

PYTHON -c "import counting_atomic"

PYTHON -c "import counting_locked"

######## setup.py ########

from distutils.core import setup

from Cython.Distutils import build_ext

from Cython.Distutils.extension import Extension

setup(

    ext_modules = [

        Extension("counting_atomic", ["counting_atomic.pyx"]),

        Extension("counting_locked", ["counting_locked.pyx"],

                  define_macros=[('CYTHON_ATOMICS', '0')])

    ],

    cmdclass={'build_ext': build_ext},

)

######## counting_atomic.pyx ########

include "counting.pxi"

######## counting_locked.pyx ########

include "counting.pxi"

######## counting.pxi ########

cimport cython

from cython.parallel cimport prange

cdef int[100] a

cdef int[:] m = a

cdef Py_ssize_t i

for i in prange(1000000, nogil=True, num_threads=16):

    use_slice(m[::2])

cdef int use_slice(int[:] m) nogil except -1:

    cdef int[:] m2 = m[1:]

    m = m2[:-1]

    del m, m2

    return 0