[foreign-memaccess+abi] Integrated: 8299181: PaddingLayout unable to return byteAlignment value

[Per Minborg]

On Wed, 11 Jan 2023 10:25:47 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes bit-aligning `PaddingLayout` to 8 by default as opposed to the current  value of 1.
> 
> More generally, the PR restricts `PaddingLayout` bit-alignment to non-negative values that are an even multiple of 8 (i.e. 0, 8, 16, ...). There are no mechanism to derive `VarHandle` objects for sub-byte access anyhow and trying to obtain a miss-aligned `VarHandle` would throw an exception. 
> 
> If integrated, all `MemoryLayout` types would be byte-aligned.

This pull request has now been integrated.

Changeset: 477cc26f
Author:    Per Minborg <pminborg at openjdk.org>
URL:       https://git.openjdk.org/panama-foreign/commit/477cc26fe153b406c5b7477dec08a6ecb3d93a0f
Stats:     166 lines in 9 files changed: 44 ins; 77 del; 45 mod

8299181: PaddingLayout unable to return byteAlignment value

Reviewed-by: mcimadamore

-------------

PR: https://git.openjdk.org/panama-foreign/pull/766