Re: [Boost-users] boost serialization & module boundaries

From: Christian Widmer (cwidmer_at_[hidden])
Date: 2008-03-14 13:13:14

Dear Robert,

Robert Ramey wrote:
> I'm not sure what "shared object" means here.
>   
Shared-object in the sense of a dynamically linked library (DLL).
> Which should be fine as is if labels in fact a pointer to one instance of 
> CLabels.
>
> If labels is a base class pointer to a more derived type,
> it,s THAT derived type which must be exported.
>   
"labels" is in fact a pointer to a instance of CLabels, not a base class
pointer. The code above works just fine if contained in the same
shared-library (DLL). Not sure how to proceed.

Best regards,

Christian Widmer

> Christian Widmer wrote:
>   
>>> Dear Robert,
>>>
>>>
>>> thank you for your reply. After struggling with some other issues
>>> for a couple days, I've compiled boost-1.34 with the serialization
>>> patch from your website, as you suggested.
>>>
>>> In deed, the "unregistered class" problem disappeared, but was
>>> unfortunately replaced by a "unregistered void cast" exception when
>>> trying to serialize across shared-object boundaries.
>>>
>>> All classes are registered using BOOST_CLASS_EXPORT in their
>>> respective .cpp file, yet I can't get it to work. I attached a piece
>>> of my code to this email. The attached archive contains the
>>> following files:
>>>
>>> - Classifier.h
>>> - Classifier.cpp
>>> - Labels.h
>>> - Labels.cpp
>>>
>>> The class CClassifier has a field labels of type CLabels. The classes
>>> are contained in two separate shared-objects. When trying to
>>> serialize an object of type CClassifier, an exception gets thrown
>>> when attempting to serialize the field labels. Any ideas?
>>>
>>>
>>> Best regards,
>>>
>>> Christian Widmer
>>>
>>>       
>
>
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