pointer equivalence

[Ty Young]

Hi,


Is there any plans to make pointer equivalence(==) work for objects that 
are derived from native memory, so that:


MemorySegment segment = 
MemorySegment.allocateNative(MemoryLayouts.JAVA_LONG);

VarHandle handle = MemoryHandles.varHandle(long.class, 
ByteOrder.nativeOrder());

handle.set(segment, 0, 500);

Long valuePointer = (Long)handle.get(segment, 0);

Long valuePointer2 = (Long)handle.get(segment, 0);

System.out.println(valuePointer == valuePointer2);


prints true.


I'm guessing as-is if valuePointer was to go out-of-scope while being 
part of a WeakHashMap, the WeakHashMap key would be removed. It seems 
like everything stored in-memory is just a value as far as Java is 
concerned, and the number classes, along with MemoryAddress, just create 
new instances or point to cached ones.


I'm more interested in pointer equivalence when it comes to 
MemoryAddress than numbers as it could be useful in creating 
automatically managed native memory heaps. This, along with the fact 
that MemorySegment.address() returns a new MemoryAddress instance(is 
this a bug?) kinda throw a wrench into some ideas on how to make one.