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Tim Ellison commented on HARMONY-5488:
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No, I'm thinking more along the lines of extending the portlib with wrappers to native socket
and file IO functionality like readv and writev in unixes and equivalent functionality on
windows
http://msdn2.microsoft.com/en-us/library/ms740138(VS.85).aspx
http://msdn2.microsoft.com/en-us/library/aa365472.aspx
> [classlib][nio] Scatter/gather calls should use OS functionality
> ----------------------------------------------------------------
>
> Key: HARMONY-5488
> URL: https://issues.apache.org/jira/browse/HARMONY-5488
> Project: Harmony
> Issue Type: Improvement
> Components: Classlib
> Reporter: Tim Ellison
> Attachments: Harmony-5488.diff
>
>
> I just noticed that our NIO implementation of scatter / gather calls (e.g. o.a.h.nio.internal.SocketChannelImpl#write(ByteBuffer[],int,int))
are actually copying the data into a single Java heap buffer before calling the OS! :-( and
FileChannelImpl copies into a single direct byte buffer.
> These need to be reimplemented in terms of the OS scatter/gather capabilities to avoid
copying.
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