How multithreading works in hardware using D ==AND== difference b/w goroutine and threads in D

[Sparsh Mittal]

>
> In D's case, it depends. If you are making use of threading 
> APIs directly then you have 1:1 mapping to OS threads, but if 
> you use actors
> or std.parallelism module, then you have a N:1 mapping between 
> tasks and OS threads.
Thanks a lot for your prompt reply.

I am using: std.concurrency and core.thread. Then, I spawn 
threads as:
spawn(&singleWorker, thisTid);

So, would you tell which category (from what you told) my code 
falls into.