When there are pending alarms but no handles, select() is called
to sleep with subsecond precision, as advertised in select(2).
However, on Win32 it does not seem to work like that. Instead,
select() returns immediately (with a failure, I believe).
When there are no handles and the timeout is > 0, could we try
calling Time::HiRes::usleep instead? Don't know if that's more
portable, but I think I heard somewhere that Time::HiRes is
going to become a core module soon.
Otherwise, when there are no handles and the timeout is >= 1,
could we call sleep(int($timeout)) before calling select()?
Kirill
