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From "Alexei Zakharov" <alexei.zakha...@gmail.com>
Subject Re: [classLib]Given a long value, RI behaves differently on windows and linux (and TestNG?)
Date Tue, 25 Jul 2006 11:32:35 GMT
Hi,

Is there any known real applications that use NIO for reading stuff
with 4GB blocks?


Regards,

2006/7/25, Leo Li <liyilei1979@gmail.com>:
> 2006/7/25, Jimmy, Jing Lv <firepure@gmail.com>:
> >
> > Hi:
> >
> >     I find another platform-dependent operation
> > FileChannel.transforFrom(ReadableByteChannel src, long position, long
> > count) in java.nio.channels. RI behaves differently if the given count
> > is larger than Integer.MAX_VALUE: on windows, it throws an IOException;
> > on Linux, it return zero silently. It is clear that the difference is
> > caused by system call. Unfortunately Harmony fails to behave like RI as
> > its has the same native code using the port-lib.
> >     If it is necessary to make Harmony behaving exactly like RI, I
> > suggest writing native code for transforFrom. This may be a
> > waste-of-effect as it is nearly the same except for this little
> > difference.However, currently people have few chances to use a size
> > larger than Integer.MAX_VALUE(nearly 4G, is it?), and system call does
> > not support long value to pass in.
> >
> >     Another thing I'd like to mention is that it'll be great if we can
> > use testNG, or decide some other way to go. At least 2 testcases should
> > be written for different platform as I remember, including the one for
> > this problem. :)
> >
> > --
> >
> > Best Regards!
> >
> > Jimmy, Jing Lv
> > China Software Development Lab, IBM
> >
> > ---------------------------------------------------------------------
> > Terms of use : http://incubator.apache.org/harmony/mailing.html
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> >
> > Dear Jimmy:
>        As spec is not clear about how to deal with the argument greater
> than Integer.MAX_VALUE, maybe we shall look more closely at what RI does and
> how the system call behaves.
>         I think it will be a good idea to let native code or even system
> call itself treat with such affairs, provided that Harmony will support some
> 64-bit  platforms one day. Thus it may be not so wise to throw some
> exception in java code if encountering the data longer than 32-bits.
>        Besides, whether we should behaves the same as RI, even if it is
> different on different platforms? :)
>
>
>
> --
> Leo Li
> China Software Development Lab, IBM


-- 
Alexei Zakharov,
Intel Middleware Product Division

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