[Libreoffice] Reporting an error when loading of a component fails

[Caolán McNamara]

On Tue, 2011-08-02 at 14:58 +0200, Lubos Lunak wrote:
> - osl_loadModule*() functions are plain C functions from stable API, so no 
> overloading to add the extra argument for the error message, the best I've 
> come up with was simply a wrapper around dlerror(), which I admit is not very 
> nice API either, would there be any better approach?

Has the obvious issue of an gap between error and retrieving the error
and some other thread churning away in between, how about...

A oslModule is a void* and we're currently just directly casting the
return from dlopen (and the windows equivalent) to a oslModule

Maybe one possibility is instead a private struct like

struct unx_impl_Module
{
	void *m_pRealHandle;
	const char *m_pLastError;
};

in osl/unx/module.c, malloc one of those and return *that* as the
oslModule from the osl_loadModule* family. Free it in osl_unloadModule.
Do the fixup in the various methods to cast oslModule to unx_impl_Module
and get the realhandle out of it for the dl* family. Now can add a new
toplevel osl c-function to check for error.

oslModule stays a void* and all should remain abi-groovy methinks ?

C.