(pp-tt-cancel port-number)
This procedure cancels a running testing thread for the specified port.
A running testing thread is cancelled.
ok or #f
> (pp-tt-running? 5)
#f
> (pp-tt-create 5)
ok
> (pp-tt-running? 5)
#t
> (pp-tt-cancel 5)
ok
> (pp-tt-running? 5)
#f
>