[flext] Threaded objects that aren't externals

[Thomas Grill]

Hi Spencer,
i think there's some slight misunderstanding.
If your class does not represent a Pd/Max object class (which it can't  
as it's static), you can't use any of those functions that interact  
with object classes/instances, such as FLEXT_THREAD_X or any other  
FLEXT_THREAD_* macros.
You can inherit from the flext class though, which is just a  
namespace, simplifying access to static methods.

Instead, to launch a thread you would use the flext::LaunchThread  
function, found in flsupport.h

gr~~~

> I've got an external where each instance of the external is sharing
> access to a class (MantaManger) instance that's defined as static for
> that class.
>
> The static object is supposed to handle a few threads that my  
> externals need.
>
> what should the class of my static object inherit from? flext,
> flext_obj, flext_base?
>
> inheriting from flext gave errors when I tried to declare the threaded
> method using the FLEXT_THREAD_X macro because my class didn't have a
> "t_classid" member, which is defined in flext_obj.
>
> inheriting from flext_obj complained that:
> error: invalid static_cast from type ‘flext_base_multi*’ to type
> ‘MantaManager::thisType*’
> in the FLEXT_THREAD_X macro because I didn't inherit from flext_base
>
> The only way to get past this was to inherit from flext_base, but I
> was under the impression
> that that's only supposed to be for classes that actually represent
> externals. Am I doing
> something wrong?
>
> Also, after having MantaManager inherit from flext_base I'm also
> getting segfaults in the constructor in the
> flext_obj_multi::HasAttributes() function.
>
> Thoughts?
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