[gomd-devel] Re: Dynamic class loader: example

[Gian Paolo Ghilardi]

Hi all.
Ok for updating the CVS... But where I put the files (directory)?

BTW, I forgot to call the distructor in main.cpp... :)))

Now I'm away. I'll commit the files this evening.
Bye.

<JP>

----- Original Message -----
From: "Matthias Rechenburg" <address@hidden>
To: "Gian Paolo Ghilardi" <address@hidden>; "gomd developers mailing list"
<address@hidden>
Sent: Sunday, March 30, 2003 12:38 PM
Subject: Re: Dynamic class loader: example


> Hey JP,
>
> On Samstag 29 März 2003 22:56, Gian Paolo Ghilardi wrote:
> > Hi all.
> >
> > I've read some docs to understand how to instance a class from a library
in
> > Linux.
> > BTW: Linux's lib loading functions are "pure" C functions and,
obviously,
> > dont' understand what's a class... :)))
> >
> > I hope you all like this simple example of dynamic class loading.
>
> "yes",
> and again "yes" ! :) perfect !
> This is a good framework. please commit to the cvs
> (i did not tested them it yet but i went over the files and it
> looks very ok to me)
>
> Now we just need to impletment the getload function to
> - read the gomd-configuration from the config-file
>   (maybe we should do this once at construction time and put
>   it in a global variable/struct)
> - post a reqest to the configured gomd socket
> - get the returned value
> - and return it (or an error happened)
>
> and after that we can create all other methods
> (or at least the most of them) in a similar way.
>
> >
> > The package contains 3 files:
> >
> > - main.cpp    (main code: contains the calls to Linux's library loader)
> > - libgomd.cpp (is the class loaded at runtime)
> > - lgomd.hpp (an header used by both main.cpp and libgomd.cpp: so the
main
> > app knows what to load!)
> >
> > How to compile:
> > - main.cpp:        g++ main.cpp -o testlib.app -ldl
> > - libgomd.cpp:   g++ libgomd.cpp -o libgomd.so -shared
>
> yep, just put it in the libgomd Makefile
> ..... and we need also to link the libgomd to the commoncpp lib
> because it will use similar methods from commoncpp to connect
> to the gomd socket.
>
> >
> > How to execute
> > - ./testlib.app [nodeId]
> >
> >
> > Obviously the two binaries must be in the same directory... :)
> >
> > Reference links:
> > - http://www.linuxjournal.com/article.php?sid=3687
> > - http://www.jdkoftinoff.com/linux1.html
> > -
> >
http://www.ibiblio.org/pub/Linux/docs/HOWTO/mini/other-formats/pdf/C++-dlop
> >e n.pdf
>
> all bookmarked.
>
> >
> > I need you comments... :)
>
> here you got them. Many thanks JP !
>
> >
> > Bye.
> >
> > <rejected>
>
> all the best for you all,
>
> Matt
> --
> E-mail :  address@hidden
> www : http://www.openmosixview.com
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> The feature you'd like to have is probably already installed on your
> Linux system.
>