[Ironpython-users] ctypes module in version 2.7.2 can't create Union values

[Slide]

As I mentioned, I ran both ipy64.exe and ipy.exe (you can see from my
output that is shows a 64-bit runtime for ipy64 and a 32-bit runtime
for ipy.exe and it made no difference. They both worked for me.

slide

On Fri, Apr 20, 2012 at 1:46 PM, Bruce Bromberek
<bruce.bromberek at gmail.com> wrote:
> Looks like you are running 32bit python on a 64 bit OS
>
> On 4/20/12, Slide <slide.o.mix at gmail.com> wrote:
>> I am unable to reproduce this, I am also running Win7 x64
>>
>> Running with ipy64.exe
>>
>> IronPython 2.7.2.1 (2.7.0.40) on .NET 4.0.30319.261 (64-bit)
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> from ctypes import *
>>>>> class foo(Union):
>> ...     __fields__ = [("t", c_uint), ("b", c_float)]
>> ...
>>>>> bar = foo()
>>>>> bar.t = 1
>>>>>
>>
>> Running with ipy.exe
>>
>> IronPython 2.7.2.1 (2.7.0.40) on .NET 4.0.30319.261 (32-bit)
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> from ctypes import *
>>>>> class foo(Union):
>> ...     __fields__ = [("t", c_uint), ("b", c_float)]
>> ...
>>>>> bar = foo()
>>>>> bar.t = 1
>>>>>
>>
>>
>> On Fri, Apr 20, 2012 at 6:45 AM,  <mva at sysfault.org> wrote:
>>> Dear all,
>>>
>>> on a 64-bit Windows 7 machine (other platforms untested), I find myself
>>> unable to create a
>>> ctypes.Union-based class wrapper for a C type.
>>> Regardless of what kind of Union I create, it always ends up with a
>>> "object reference not set to an instance of an object" error from .NET.
>>> Find
>>> below a brief
>>> command line example including the necessary .NET and IronPython
>>> information.
>>>
>>> IronPython 2.7.2.1 (2.7.0.40) on .NET 4.0.30319.261 (32-bit)
>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>>
>>>>>> from ctypes import *
>>>>>> class foo(Union):
>>>
>>> ...     _fields_ = [("t", c_uint), ("b", c_float)]
>>> ...
>>>>>>
>>>>>> bar = foo()
>>>>>> bar.t = 1
>>>
>>> Traceback (most recent call last):
>>>  File "<stdin>", line 1, in <module>
>>> SystemError: Object reference not set to an instance of an object.
>>>
>>> I'm not subscribed to this list, in case you require more information
>>> please
>>> keep me in CC.
>>>
>>> Regards
>>> Marcus
>>>
>>> _______________________________________________
>>> Ironpython-users mailing list
>>> Ironpython-users at python.org
>>> http://mail.python.org/mailman/listinfo/ironpython-users
>>
>>
>>
>> --
>> Website: http://earl-of-code.com
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>
> --
> Sent from my mobile device



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