"""utils fonctions non windows-related"""
import ctypes


def fixedpropety(f):
    cache_name = "_" + f.__name__

    def prop(self):
        try:
            return getattr(self, cache_name)
        except AttributeError:
            setattr(self, cache_name, f(self))
            return getattr(self, cache_name)
    return property(prop, doc=f.__doc__)


def swallow_ctypes_copy(ctypes_object):
    new_copy = type(ctypes_object)()
    ctypes.memmove(ctypes.byref(new_copy), ctypes.byref(ctypes_object), ctypes.sizeof(new_copy))
    return new_copy