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PYTHON setup.py build_ext --inplace
PYTHON -c "import foo"
PYTHON -c "import a"
PYTHON -c "import b"
######## setup.py ########
from Cython.Build import cythonize
from distutils.core import setup
setup(
ext_modules = cythonize("*.pyx"),
)
######## foo.pxd ########
cdef int bar() except *
cdef extern from "bar_impl.c":
struct mystruct:
int (*func_ptr)(int param) nogil
######## foo.pyx ########
cdef extern from "bar_impl.c":
int bar() except *
######## bar_impl.c ########
static int bar() { return -1; }
typedef struct mystruct {
int (*func_ptr)(int param);
} mystruct_t;
######## a.pyx ########
cimport cython
from foo cimport bar
assert bar() == -1
######## b.pyx ########
from foo cimport mystruct
cdef int cb(int param) noexcept nogil:
return param
cdef mystruct ms = mystruct(&cb)
assert ms.func_ptr(5) == 5
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