Problem with templates and Dll export

[Marc André Ueberall]

Hi there!

I've got the following problem and would be very happy if there is somebody
with a solution! =)

Btw. I'm using Microsoft Visual C++ 6.0 Std Edition

I've generated a template class called "CSingleton "

template <class T>
class __declspec(dlle xport) CSingleton
{
static T *lpSingleton;

public:
CSingleton(void );
~CSingleton(voi d);

static T &GetSingleton(v oid);
static T *GetSingletonPt r(void);
};

Now I'm going to implement a texture manager (or whatever) like this

class DUSKENGINE_API CTextureManager : public CSingleton<CTex tureManager>
{
public:
CTextureManager (void);
~CTextureManage r(void);
};

When compiling this I get the following errors:

....
CTextureManager .obj : error LNK2001: "public: __thiscall
DuskEngine::Cor e::CSingleton<c lass
DuskEngine::Ren derer::CTexture Manager>::CSing leton<class
DuskEngine::Ren derer::CTexture Manager>(void)" (??0?$CSingleto n@VCT
extureManager@R enderer@DuskEng ine@@@Core@Dusk Engine@@QAE@XZ)
CTextureManager .obj : error LNK2001: "public: __thiscall
DuskEngine::Cor e::CSingleton<c lass
DuskEngine::Ren derer::CTexture Manager>::~CSin gleton<class
DuskEngine::Ren derer::CTexture Manager>(void)" (??1?$CSingleto n@VC
TextureManager@ Renderer@DuskEn gine@@@Core@Dus kEngine@@QAE@XZ )
....

How do I export home-brew-templates and classes that are using them in a
dll???

Thank you for your comments!


Marc André Ueberall

[Param]

Re: Problem with templates and Dll export

Hi
I guess u are right exporting from a DLL is not defined...
But u can try using explicit template instantiation where the Object for the
class is created with some of the known types
i.e. the writer of the class should be aware of the type of instantiations
for that peculiar template class...

This instantiation can be exported from the DLL and then u could use this
class with no Linking errors...

Paramjeet Singh


"Victor Bazarov" <v.Abazarov@att Abi.com> wrote in message
news:vi0gder568 bae9@corp.super news.com...[color=blue]
> "Marc André Ueberall" <mueberall@dusk engine.de> wrote...[color=green]
> > ...
> >
> > How do I export home-brew-templates and classes that are using them in a
> > dll???[/color]
>
> Exporting from a DLL is not defined by the C++ language. Please
> post your compiler-specific question to microsoft.publi c.vc.language.
>
> Victor
>
>[/color]