function to detect keyboard hit

["Shen, Xinzhuo \(US SSA\)" <xinzhuo.shen@xxxxxxxxxxxxxx>]

Dear Sir/Madam:

Is there a function in gcc to detect a keyboard hit?  Windows provides a
function _kbhit().  It operates in non-blocking mode, returns 0 until
the user hits a key on the keyboard.  Does gcc have the similar function
to call?

Thanks,

Sean