Storing C++ data in an instance field using CNI?

Thu May 27 18:21:00 GMT 2004

Stanley Brown wrote:
> I played a little bit with RawData. Soon my Java code became very GCJ 
> dependent. I eventually switched back to JNI (which GCJ handles just 
> fine) storing pointers in long instance variables and NIO buffers. To 
> be fair this was mainly because I ran into complications on the Win32 
> port where (1) I could not mix C++ and GCJ and (2) creating instances 
> of Calendar overloaded the memory.
>> Could someone please explain the advantage of using RawData over the 
> methods I employed?
>CNI has lower overhead than JNI.
If you use RawData, your code will continue to work when ported to 
architectures with 128bit pointers.
David Daney.