RFR [8055915]: (ch) FileDispatcherImpl.truncate0 should use SetFileInformationByHandle [win]

Alan Bateman Alan.Bateman at oracle.com
Mon Aug 25 20:15:26 UTC 2014

On 25/08/2014 15:37, Ivan Gerasimov wrote:
> Hello!
> It is a proposal to reimplement FileDispatcherImpl.truncate0 with a 
> single call to SetFileInformationByHandle().
> The later is available on Windows starting with Vista & Server 2008 [1].
> The code should be buildable on XP & Server 2003.
> The existing test java/nio/channels/AsynchronousFileChannel/Basic.java 
> was used to verify the functionality isn't broken.
> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8055915
> WEBREV: http://cr.openjdk.java.net/~igerasim/8055915/0/webrev/
I think this okay although I think I think a reminder about the size of 
LARGE_INTEGER to be confident that the conversion from jlong is correct.

AsynchronousFileChannel/Basic.java just happens to exercise it so I 
won't update it's @bug. Best to run the :jdk_nio tests on Windows 32-bit 
and 64-bit to check the change.


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