[foreign-memaccess+abi] RFR: 8263018: Improve API for lifecycle of native resources [v10]

[Maurizio Cimadamore]

On Mon, 15 Mar 2021 18:28:32 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

> Less sure about `SegmentAllocator.of(scope)` -> `ResourceScope.toAllocator()`, FWIW I noticed this is a subset of `malloc`:
> 
> ResourceScope scope = ...
> SegmentAllocator fixedScopeAllocator = SegmentAllocator.malloc(() -> scope);
> 
> There might also be some interconnections with `ScopedSegmentAllocator`? Seems like we either want to compose through inheritance or have some bi-direction between the two abstractions.

Good point - if we had a ScopedSegmentAllocator abstraction, I believe creating an allocator from a scope would not be as important (if clients need both an allocator and a scope, well they can just allocate a ScopedSegmentAllocator).

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PR: https://git.openjdk.java.net/panama-foreign/pull/466