Re: [Boost-users] Serialization of derived class in a plugin

Subject: Re: [Boost-users] Serialization of derived class in a plugin
From: Jean-Charles Quillet (jeancharles.quillet_at_[hidden])
Date: 2009-12-21 03:29:57

Ok,
even if it's not in the 1.42 release I'd be very interested by a patch
making it works as soon as it's available. In the meantime I'll try to use
the version 1.37, on this web page someone reported that this feature was
working:

https://kyuu.co.uk/article/6

Jean-Charles

On Sun, Dec 20, 2009 at 10:25 PM, Robert Ramey <ramey_at_[hidden]> wrote:

>  OK - found it now.
>
> I've invested a little time to look into it.  A couple of things
>
> a) turns out I never really built/ran this this test.  It depended on my
> getting
> more understanding to how to test a dll with boost and setting my msvc IDE
> to handle this.  Lately I got this squared away but I hadn't run the test.
>
> a) the test uses the polymorphic_archive.  This seemed to confuse me
> (mostly
> because the word "polymorphic" is all over the place) so I changed it to
> text_?archive.
>
> b) So I ran the test and found a couple of dumb bugs.  Need to link to the
> dll_polymorphic_derived2.dll, etc.
>
> c) needed to add a marcro
> BOOST_SERIALIZATION_FACTORY_0(polymorphic_derived2)
> to the header so the plugin factory would work.
>
> d) After all this - the program builds and runs - but has fails to recover
> the proper
> pointer.  I"m looking into this.  I'll uploaded updated test to trunk when
> it's done.
> I do not think this fix will make it into it into boost 1.42.
>
> Robert Ramey
>
>
> "Jean-Charles Quillet" <jeancharles.quillet_at_[hidden]> wrote in message
> news:3dd8f9530912200857y985aa2cqee9931d44f4c94f7_at_mail.gmail.com...
> I'm working with the latest version 1.41
>
> You can have a look here, I'm not sure to understand the boost repository,
> but it looks quite similar of what I have:
>
>
> https://svn.boost.org/trac/boost/browser/branches/release/libs/serialization/test
>
> You'll find the source file I'm talking about (it's actually
> test_dll_plugin.cpp and not test_plugin_dll.cpp but you'd have made the
> correction yourself) along with the bjam file with the commented line.
>
> Jean-Charles
>
> On Sun, Dec 20, 2009 at 5:43 PM, Robert Ramey <ramey_at_[hidden]> wrote:
>
>>  I can't find test_plugin_dll.cpp in my latest package.  How about
>> sending me a copy.
>>
>> Robert Ramey
>>
>>
>> "Jean-Charles Quillet" <jeancharles.quillet_at_[hidden]> wrote in message
>> news:3dd8f9530912200316r36477536sd6958d55b13aaff1_at_mail.gmail.com...
>>  Ok,
>>
>> I understand that it should work somehow, so I'm doing something wrong.
>> I've checked it and I got quite a few virtual abstract functions in my main
>> class overridden in the derived classes.
>>
>> I've seen all these demo and test. And the one that comes closer to my
>> problem is definetly test_plugin_dll.cpp Unfortunaltly it is commented in
>> the Jam file and when I uncommented the line, it won't compile.
>> How can I compile it ?
>> Thanks for your help,
>>
>> Jean-Charles
>>
>> On Sun, Dec 20, 2009 at 12:19 AM, Robert Ramey <ramey_at_[hidden]> wrote:
>>
>>>  note that there a few demos of this facility example/demo_???.  Also
>>> demo_pimple might be helpful.
>>>
>>> Also there is test_exported_dll and test_simple_dll.
>>>
>>> Check these out and see if it helps.
>>>
>>> Also, quadriple check that your base class has at least one virtual
>>> function.
>>>
>>> Robert Ramey
>>>
>>>
>>> "Jean-Charles Quillet" <jeancharles.quillet_at_[hidden]> wrote in message
>>> news:3dd8f9530912190643k77ed2c0co2aeabf7d41af35a2_at_mail.gmail.com...
>>>  Hi,
>>>
>>> I've been using the boost serialization on many projects. But I can't
>>> manage to make it work on my current project.
>>>
>>> Basically, I've a main application and an abstract class located in a
>>> separate dll. The application loads dynamically plugins which defines
>>> classes derived from the abstract class. Then I'm trying to serialize a
>>> class created by a plugin using a pointer to the abstract class, I always
>>> get a "Unregistered class" exception. I've used the BOOST_CLASS_EXPORT macro
>>> in the plugins trying to make the boost serialization library aware of my
>>> classes without any success so far.
>>>
>>> Looking in the source directory and specially in the "test" directory,
>>> I've seen that what I'm trying to do is the same as the test described by
>>> the file test_dll_plugin.cpp, unfortunately, it seems the test is not
>>> compiled and I can't manage to make it link without error.
>>> So my main concern is: is this feature supposed to be working ? If not
>>> I'll have to review my design. If it does what is the magic to make it work
>>> (like how to compile test_dll_plugin.cpp or another simple working example)
>>> ?
>>> Thanks for any help,
>>>
>>> Jean-Charles
>>>
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