Non-blocking keyboard input

[Joe at bloow.edu]

??????????????????????????????????????? Surely there there is a 
one liner library solution  for this?

I have a program that spawns a thread for debugging information 
and uses the keyboard input which allows me to display the 
information.

If I use getchar or readline then it blocks the thread. This is 
generally fine because that is all the thread does. The problem 
is that it also blocks the program termination as the main thread 
will not exit while the thread is running which is is because 
it's waiting on keyboard input stuck on getchar or fgetc or 
whatever.

If I terminate the threads using thread_term then it terminates 
the program but the program then does not return the return code 
that it was successfully finished(because it was prematurely 
terminated by thread_term.

Surely there is some type of peek for keyboards in D? I can't 
seem to get kbhit or because the library is not included(well, I 
tried to use one from dmc but it seemed to be invalid. snn.lib 
IIRC).


This shouldn't be hard... yet it is.