My understanding is that that arena allows you to allocate memory segments, but you can't do much with it, you can't allocate var or object on it like in C++ for example, so its almost useless.

▲

pjmlp 2 days ago | parent | next [-]

You certainly can, as they were designed as JNI replacement, with the goal to fully support the C ABI of the host platform.

You can either do the whole boilerplate manually with Panama set of APIs, or write a C header file and let jextract do the work of boilerplate generation.

	▲	riku_iki 2 days ago \| parent [-]
		> You certainly can I am wondering if there is working code example, or this is just speculation?

▲

kernal 2 days ago | parent | prev [-]

https://docs.oracle.com/en/java/javase/21/core/memory-segmen...

	▲	riku_iki 2 days ago \| parent [-]
		That Arena is not integrated into language. You can't do something like: var myObj = new(my_arena) MyClass();