hg: jdk10/jdk10/jdk: 8184807: (ch) Clean up handling of some Windows function return values in libnio

[brian.burkhalter at oracle.com]

Changeset: b2fada7695e7
Author:    bpb
Date:      2017-07-18 17:56 -0700
URL:       http://hg.openjdk.java.net/jdk10/jdk10/jdk/rev/b2fada7695e7

8184807: (ch) Clean up handling of some Windows function return values in libnio
Summary: Properly check and respond to Windows function return values in libnio
Reviewed-by: alanb

! src/java.base/windows/native/libnio/ch/FileChannelImpl.c
! src/java.base/windows/native/libnio/ch/FileDispatcherImpl.c
! src/java.base/windows/native/libnio/ch/WindowsAsynchronousFileChannelImpl.c