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

Subject: Re: [Boost-users] Serialization of derived class in a plugin
From: Robert Ramey (ramey_at_[hidden])
Date: 2009-12-20 16:25:29

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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