If value is readable gets or fetches and return's the value or else throws IO.Exception.Busy.
If value is readable gets or fetches and return's the value or else throws IO.Exception.Busy.
Opens all IO.Async types to read the final value in a blocking manner.
Opens all IO.Async types to read the final value in a non-blocking manner.
Opens all IO.Async types to read the final value in a non-blocking manner.
(Since version ) see corresponding Javadoc for more information.