Calling D library from other languages on linux using foreign threads

[tchaloupka]

On Saturday, 23 March 2019 at 17:33:31 UTC, tchaloupka wrote:
> I've no idea what should be done with C's main thread as it 
> can't be attached because it'll hang.
> In one of forum threads I've also read the idea to not using 
> foreign threads with GC but somehow delegate their work to D's 
> thread.
> Can this work somehow? But `new Thread()` would still be needed 
> to call from C side or static this() but from C's thread.

I've tried this approach here: 
https://github.com/tchaloupka/dlangsharedlib/tree/master/workaround.

I must say, it's an ugly and error prone hack.. :(

It seems to be working, but questions remain:
* is it ok to initialize D runtime and then use GC in the same C 
thread (to create worker Thread)?
* is this reliable?
* should foreign threads work with D's runtime at all?

In the current state, D's libs seems to be pretty useless to be 
used from other languages if GC is needed.