Ctypes.CFUNCTYPE needs patching for iOS

[akshayaurora]

Versions

• Python : 3.9.9
• iOS version : any
• XCode Version : any
• Cython version : any

import ctypes

def functown(number: ctypes.c_int):
    print(number)

funcy = ctypes.CFUNCTYPE(None, ctypes.c_int)(functown)

This leads to a MemoryError everytime on iOS(Physical Device), only rarely on desktops/emulator. Issue is exactly as mentioned here https://bugs.python.org/issue36880

Since this is a known issue we should add it to the patches for python3 on kivy-ios.

Fix as mentioned on the issue.... https://github.com/python/cpython/pull/13364/files

[akshayaurora]

Upon further investigation including the mentioned patch does not help in fixing the issue :/ .

[akshayaurora]

Solution for me was simply to go the cython route. Keeping issue open as it's still relevant and others might come across same issue.

[dvjdjvu]

Yes, I got this problem.