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From: "Lucien Mathieu" <lucien DOT mathieu AT skynet DOT be>
To: "'Ronald Landheer-Cieslak'" <ronald AT landheer DOT com>
Cc: <cygwin AT cygwin DOT com>
Subject: RE : Call dynamic pointer
Date: Mon, 21 Jul 2003 21:29:02 +0200
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Hello again,

	following this example:

	TObject.hpp:

		class Tobject {
			...
		};

		extern "C" {
			void * init();
		}

	TObject.cpp

		void * init() {
			return (new Tobject());
		}

	I create a DLL, g++ -c Tobject.cpp
		g++ -shared -o Tobject.dll Tobject.o

	When calling the init function after initialising everything
with
	dlopen, dlsym, dlcose... It's generating a segmentation fault,
is
	it due to the load and unload of the DLL? Even if I don't call
the
	dlclose at the end, it's still doing the segmentation fault, is
there
	a way of passing the pointer from the DLL to the main program
using
	dlopen/dlsym stuff?

	Let me know if I can't ask this kind of question to the list ;-P

Thanks in advance,
Lucien.

-----Message d'origine-----
De : Ronald Landheer-Cieslak [mailto:ronald AT landheer DOT com] 
Envoyé : lundi 21 juillet 2003 15:48
À : Lucien Mathieu
Cc : cygwin AT cygwin DOT com
Objet : Re: Call dynamic pointer


On Mon, 21 Jul 2003, Lucien Mathieu wrote:
> Hello,
> 
> 	in a dll, I'm calling a
> 
> 	extern "C" {
> 		void * init();
> 	}
> 
> 	where it is define as follow
> 
> 	void * init() {
> 		return (new TObject());
>   	}
> 
> 	it's doing a segment fault,
> 	does the new pointer is automatically deleted?
> 	
> 	I was thinking not to use the dlclose in the main program,
> 	but it doesn't work either.
> 
> 	Any idea how to return a pointer from a DLL to a main program?
> 
> Thanks in advance,
You're not providing nearly enough information about your problem. Have
a 
look at http://www.cygwin.com/problems.html for more information.

HTH

rlc






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