We`re develping a PKCS11 modul in c/c++ for a custom card reader to support. I
just want to display a simple dialog. The code below works great until I stay
on MS Visual Studio. But our project is running on eclipse/gcc.
nsCOMPtr<nsIPromptService> promptService =
do_GetService("@mozilla.org/embedcomp/prompt-service;1"));
promptService->Alert(NULL, NULL, NULL);
I`m getting the following error during linking, that comes because of the
different coding convention between VS and mingw/gcc on windows.
C:/download/xulrunner-41.0b9.en-US.win64.sdk/xulrunner-sdk/include/nsCOMPtr.h:514:
undefined reference to
`nsCOMPtr_base::assign_from_gs_contractid(nsGetServiceByContractID, nsID
const&)'
Am Montag, 7. März 2016 18:50:36 UTC+1 schrieb Benjamin Smedberg:
> On 3/7/2016 11:17 AM, Tobias Wolf wrote:
> > I try to call this code dynamically:
> >
> > nsCOMPtr<nsIPromptService> promptService =
> > do_GetService("@mozilla.org/embedcomp/prompt-service;1"));
> > promptService->Alert(NULL, NULL, NULL);
> >
> > I do the following:
> >
> > nsISomeInterface* mXPTCStub;
> > nsresult rc;
> > nsXPTCVariant params[3];
>
> Why are you trying to do this? Are you writing a shim layer that
> connects some other dynamic/scripting language to XPCOM?
>
> >
> > rc = NS_GetXPTCallStub(NS_IPROMPTSERVICE_IID, proxy, &mXPTCStub);
> >
> > params[0].val.p = NULL;
> > params[0].type = nsXPTType::T_VOID;
> > params[0].flags = 0;
> >
> > params[1].val.p = (void*)title;
> > params[1].type = nsXPTType::T_CHAR_STR;
> > params[1].flags = 0;
> >
> > params[2].val.p = (void*)text;
> > params[2].type = nsXPTType::T_CHAR_STR;
> > params[2].flags = 0;
> >
> > rc = NS_InvokeByIndex(mXPTCStub, 1, 3, params);
> > NS_DestroyXPTCallStub(mXPTCStub);
> >
> > But I don`t know how to use NS_GetXPTCallStub!
> > What means the second and third parameter from NS_GetXPTCallStub?
>
> Have you read the doccomments at
> http://mxr.mozilla.org/mozilla-central/source/xpcom/reflect/xptcall/xptcall.h#174
>
> ?
>
> If you are trying to *invoke* a method, you don't need an xptcall stub
> at all. You just need NS_InvokeByIndex.
>
> An XPTCall stub is used to *implement* an XPCOM object whose
> type/interface definition isn't known at compile time, typically by
> mirroring it to an underlying scriptable object. You would need to
> implement a c++ class which implements nsIXPTCProxy and implements
> CallMethod.
>
> --BDS
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