8234805: (dc) Remove JNI upcall from DatagramChannel.receive implementation

[Daniel Fuchs]

On 26/11/2019 15:27, Alan Bateman wrote:
> Right, both methods support the socket adpator, hence blocking mode. The 
> first blocks indefinitely so it has to handle EINTR, the second is the 
> timed receive case so has to temporarily configure the socket to be 
> non-blocking.

Oh - right I missed that. This is confusing.

BTW - concerning the test, main() should probably call:
IPSupport.throwSkippedExceptionIfNonOperational()
to skip the test when IPv4 is not available.

It might also be a good idea to call
NetworkConfiguration.printSystemConfiguration(System.out)
as well to hekp with diagnosis if the test fails...

best regards,

-- daniel

> http://cr.openjdk.java.net/~alanb/8234805/webrev/
> 
> -Alan