[Mono-list] Embedding mono on windows

Petit Eric surfzoid at gmail.com
Mon Mar 31 15:42:33 EDT 2008 

Damien, to have a good luke, to forget the list in your answer.

2008/3/31, Damien DALY <maitredede at gmail.com>:
> Hi Eric,
>
> What I want to do is to call my custom C function from my C#.
>
> I'm exposing it using C function mono_add_internal_call, like it is show on
> sample at http://www.mono-project.com/Embedding_Mono
> "Exposing C code to the CIL universe".
Not sur to understand evry thing and had a very quick look at the
link, but i don't think about mixed language in a single project type
?
if you speak about the chapter :" Exposing C code to the CIL universe"
it's wat i sayed, you need two part, one is a dll/so (a library) write
in C managed code and a "wrapper" of it in C#.
But if you just started the project, why don't just make evrything in C# ?

>
> So in my C code, I define a function with this code :
>
> static const void MonoMsg(MonoString *msg)
> {
>         Error(mono_string_to_utf8(msg));
> };
>
> In my C# code, I have this class :
>
> namespace MonoPlug
>  {
>     internal static class ClsInternal
>     {
>         [MethodImplAttribute(MethodImplOptions.InternalCall)]
>         internal extern static void MonoMsg(string message);
>     }
> }
>
> I expose my C function using :
>
> mono_add_internal_call("MonoPlug.ClsInternal::Msg", MonoMsg);
>
> Under windows VS2008 it compiles and runs successfuly, but under linux, I
> have compilation errors :
I gues, mono compiler is more restrictive than Crosoft one, i alredy
see it in C# in the past, there is more warning, and not sur but some
warning are "like" error, also it's like pointer problem, right ?
Nota : i have no C knoweldge.
>
> MonoPlug.Test.cpp:83: erreur: invalid conversion from «const void
> (*)(MonoString*)" to «const void*"
>  MonoPlug.Test.cpp:83: erreur:   initializing argument 2 of «void
> mono_add_internal_call(const char*, const void*)"
>
> By focing cast to (void*) I can compile, but I have a MissingMethodException
> when trying to call method...
>
> I know they are easy errors for C/C++ developpers, but since I'm starting
> coding C/C++, I don't know if I can find mysself the answer...
>
> If you want, you can answer me in French...
>
> Thanks,
>
> Damien
>
> 2008/3/31, Petit Eric <surfzoid at gmail.com>:
> > 2008/3/31, Damien DALY <maitredede at gmail.com>:
> >
> > > Thanks Robert
> > >
> > > I'm also sending to list (sorry for missed messages, they are below).
> > >
> > > I will try to work with these functions.
> > >
> > > Now, I would like to call C function from my C#, and passing arguments
> to
> > > the function (like saying hello to string argument)...
> >
> >
> http://www.google.fr/search?q=dllimport&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:fr:official&client=firefox-a
> > an Example in this file :
> >
> http://cs-obexftp.svn.sourceforge.net/viewvc/cs-obexftp/trunk/src/obexftp/obexftpPINVOKE.cs?revision=151&view=markup
> >
> > If you are luky, try SWIG (under linux) to make the biggest work!
> >
> >
> > >
> > > Thanks,
> > >
> > > Damien
> > >
> > > 2008/3/31, Robert Jordan <robertj at gmx.net>:
> > > > Hi,
> > > >
> > > > Next time please reply to the list as well.
> > > >
> > > > Mono_set_defaults and
> mono_parse_default_optimizations
> > > are not public
> > > > anymore because they were not intended to be called from user code.
> > > > The runtime is calling them for you.
> > > >
> > > > On (2): mono depends on GLib, GNOME's portable C library. This lib
> > > > provides a lot of path functions:
> > > >
> > > >
> > >
> http://library.gnome.org/devel/glib/stable/glib-Miscellaneous-Utility-Functions.html
> > > >
> > > > See g_get_current_dir, g_build_path, etc.
> > > >
> > > > On Windows, mono's installer is deploying this lib automatically into
> > > > mono's lib folder. Just link your app with "glib-2.0.lib".
> > > >
> > > >
> > > > Robert
> > > >
> > > >
> > > >
> > > > Damien DALY wrote:
> > > > > Yeah, it works !
> > > > > Thanks...
> > > > >
> > > > > Two more questions :
> > > > >
> > > > > 1) I'd like to execute :
> > > > >     mono_config_parse(NULL); //To load default config
> > > > >     mono_set_defaults(0,
> > > mono_parse_default_optimizations(NULL)); //To add
> > > > > all optimizations
> > > > >
> > > > > mono_config_parse is defined in mono-config.h. I have a linker error
> > > > > "unresolved symbol"
> > > > > mono_set_defaults and
> mono_parse_default_optimizations
> > > are not defined...
> > > > >
> > > > > I'm using windows release with installer file "
> > > > > mono-1.9-gtksharp-2.10.4-win32-4"...
> > > > >
> > > > > 2) How can I find the directory of current module executing in C++ ?
> > > > > This is to tell mono that it must search assemblies in a sub folder
> of
> > > > > current exe... (mono_set_dirs)
> > > > > And if you have a safe concat function for path... (like managed
> > > > > Path.Combine)
> > > > > And that works for any OS... :o)
> > > > >
> > > > > Thanks
> > > > >
> > > > > Damien
> > > > >
> > > > >
> > > > > 2008/3/31, Robert Jordan <robertj at gmx.net>:
> > > > >> Damien DALY wrote:
> > > > >>> Hi,
> > > > >>>
> > > > >>> I'd like to embed Mono into my app, but I haven't found some doc
> > > > >> explaining
> > > > >>> how to do this using Windows and VS2008 (under XP and Vista).
> > > > >>> The starting point I have found is
> > > > >>> http://www.mono-project.com/Embedding_Mono
> > > > >>>
> > > > >>> If someone has help about Ebedded Mono under Windows, I would be
> > > pleased
> > > > >> to
> > > > >>> hear about.
> > > > >>
> > > > >> The docs apply to Windows/Visual Studio as well, but they don't
> explain
> > > > >> how to setup a project to the same extent like they do for linux or
> > > > >> cygwin.
> > > > >>
> > > > >> Basically, you only need to generate an import library for
> mono.dll,
> > > > >> the dll that provides the embedding APIs.
> > > > >>
> > > > >> Get this file:
> > > > >>
> > > > >>
> > > > >>
> > >
> http://anonsvn.mono-project.com/viewcvs/*checkout*/trunk/mono/msvc/mono.def
> > > > >>
> > > > >> and create mono.lib with Visual Studio's lib.exe tool:
> > > > >>
> > > > >>         lib /nologo /def:mono.def /out:mono.lib /machine:x86
> > > > >>
> > > > >> Then link you application with mono.lib.
> > > > >>
> > > > >> Robert
> > > > >>
> > > > >> _______________________________________________
> > > > >> Mono-list maillist  -  Mono-list at lists.ximian.com
> > > > >> http://lists.ximian.com/mailman/listinfo/mono-list
> > > > >>
> > > > >
> > > >
> > > >
> > >
> > >
> > > _______________________________________________
> > >  Mono-list maillist  -  Mono-list at lists.ximian.com
> > >  http://lists.ximian.com/mailman/listinfo/mono-list
> > >
> > >
> >
>
>

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