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