[Mono-dev] c# / c++ interop question
zac at zacbowling.com
Fri Mar 10 01:09:37 EST 2006
I'm sort of cunfused on the direction (CLI to C++ or C++ to CLI?) and
what is going to be hosting which. I believe this might help though.
There are few methods for access classes in CLI using C/C++.
One method is by calling the mono embedding api as miguel said its a
tad slow in my experience but its nicer for somethings. In fact there
is an application right now in the mcs source under "mcs/tools/cilc/"
that will generate a binding library for you automaticly, but that
won't give you nice C++ classes, just C based GObject classes (but its
still totally accessable in C++).
The other big one is using function pointers (delagates in C#). I
uploaded this example I created to show how:
In this method I store all the function pointers (delegates in C#) in a
C# struct and pass that to the C lib on the backend using p/invoke. You
have to declare a struct in C that matches the one in C# so that it
will marshal correctly, but its not all that hard once you get the hang
of it. (See http://www.mono-project.com/Interop_with_Native_Libraries
or the msdn docs on the Marshal class and MarshalAs attribute for more
So even though it can be a little bit of work, it's totally possible.
----- Message from jaytau at yahoo.com ---------
Date: Thu, 9 Mar 2006 15:10:55 -0800 (PST)
From: J <jaytau at yahoo.com>
Reply-To: J <jaytau at yahoo.com>
Subject: [Mono-dev] c# / c++ interop question
To: mono-devel-list at lists.ximian.com
> Hi, I wrote a MS .NET 2.0 C# wrapper of a c++ 2d game engine. The
> engine (Torque Game Builder) is cross platform, so obviously it would
> be benificial to port my wrapper to mono instead of Msft's
> To talk from c# to C++, I use PInvoke, which should work in the mono
> world with little change needed.
> However, going from C++ to C#, I am using C++/CLI. Obviously, that
> will not fly in the mono world, so I'd like to find out what
> alternatives there are to do this in an elegant way. (fyi, I am an
> ok c++ dev, but i am only as advanced as kinda knowing how to use
> function pointers and run-time linking)
> So I am looking for the best way to talk from C++ to C#. As I
> mentioned, I mostly understand the concept of using function
> pointers, would that be the best way? or is there some way of
> referencing a mono assembly inside a c++ project, so I can link to it
> like a normal library?
> Or, is there a better solution?
> Thanks for your time,
> PS: (disclaimer: i pinged a similar question to the mono dev list
> maybe 8 months ago, I am repinging to see what any answer deltas may
> be :)
> Brings words and photos together (easily) with
> PhotoMail - it's free and works with Yahoo! Mail.
----- End message from jaytau at yahoo.com -----
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