WIN-28: fix POSIX file descriptor numbering assumptions

[Adam Megacz]

Bryce McKinlay <bryce@waitaki.otago.ac.nz> writes:
> How about putting the initialization of in/out/err into a native method 
> and calling it from a static initializer, ie:
>
> static
> {
>   initNative();
> }

I tried this -- unfortunately java.lang.System's <clinit> runs first,
and it read the not-yet-initialized values out of
FileDescriptor.{in|out|err} and crash trying to build a 'new
PrintStream(null)'.

If you initialize to 'new FileDescriptor(getFdFOO())', the compiler
figures out that it has to execute that code before it lets
System.java access the variable. I don't know why this happens.


> Also, you should add a fixme in the win32 code about how wrong it is to 
> store the file handle as an int!

Gotcha, I will.

Ok to commit with the FIXME?

  - a


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