8217461: (ch) Add Net.available to return the number of bytes in the socket input buffer

[Michael McMahon]

Looks fine to me Alan.

- Michael.

On 21/01/2019, 19:10, Alan Bateman wrote:
> This is a small change to add a method to sun.nio.ch.Net to get the 
> number of bytes in the socket input buffer. The motive for adding this 
> to make it possible for the socket adaptors to implement 
> InputStream::available and also to support an alternative SocketImpl 
> based on NIO. I've used the opportunity to clean up 
> NET_SocketAvailable in libnet so that it returns 0 when it succeeds.
>
> The proposed changes are here:
>   http://cr.openjdk.java.net/~alanb/8217461/webrev/index.html
>
> -Alan