[foreign-preview] RFR: 8281855: Rename ResourceScope to MemorySession [v4]

[Paul Sandoz]

On Fri, 18 Feb 2022 21:55:46 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> This patch implements some of the changes described in [1] and [2]. More specifically, the `ResourceScope` abstraction is renamed into `MemorySession`, and the session accessors in `MemorySegment`, `NativeSymbol` and `VaList` are tweaked to return *non-closeable* session views. To counteract this change, `MemorySession` now supports `equals` and `hashCode`, so that sessions views can be compared to each other in ways that are not identity-sensitive.
>> 
>> [1] - https://mail.openjdk.java.net/pipermail/panama-dev/2022-February/016152.html
>> [2] - https://mail.openjdk.java.net/pipermail/panama-dev/2022-February/016254.html
>
> Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Address review comments
>   * replace spurious usages of `scope` in direct buffer template

Marked as reviewed by psandoz (Committer).

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PR: https://git.openjdk.java.net/panama-foreign/pull/641