[Java-gnome-developer] handlers as ints?

[R. A. R. D. <riv...@ya...>]

Hello

Checking the docs I have found that handlers are treated as java ints.
As we know ints are fixed 32 bits in Java, I wonder what will happen in
64bits OSes? As I see it, two solutions are posible: 1. Have a handler
table to make the conversion, 2. Change everything to long and
recompile.
None of this is a good solution.
I think using a java.awt Peer like solution works better. Hiding the
handler in an interface that can be implemented in every platform is a
way to work around this problem without the need to change the library
in every platform.
Something like:

public interface Handler {}

public class GObject {
    public GObject(Handler handler) {
      ...
    }
    ...
}

In native code, every platform have to implement a pair of functions
like the following:

int javaToNative(JObject * handler); // receives a Handler instance
JObject * nativeToJava(int handler); // returns a Handler instance

probably inline functions that should be used whenever is necesary to
access a handler.

Then you can have a OS32bitHandler with a java int field inside, and a
OS64bitHandler with a java long field inside, and the code in
javaToNative and nativeToJava will conditionally use one of those
implementations depending on the arch.

What do you think?

regards,
Rivas.


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