[foreign-memaccess+abi] RFR: 8291639: Improve the ability to visualize a MemorySegment in human readable forms [v3]
Per Minborg
pminborg at openjdk.org
Fri May 26 16:05:50 UTC 2023
> This PR proposes to add a "Record Mapper" that allows `MemorySegment` instances to be projected onto `Record` types given `GroupLayout` instances.
>
> Here is a simple example of how to use the mapper:
>
>
> private static final GroupLayout POINT_LAYOUT = MemoryLayout.structLayout(
> JAVA_INT.withName("x"),
> JAVA_INT.withName("y"));
>
> MemorySegment segment = MemorySegment.ofArray(new int[]{3, 4});
>
> Point point = POINT_LAYOUT.recordMapper(Point.class)
> .apply(segment); // Point[x=3, y=4]
>
>
> I think the implementation can be improved later, for example by de-duplicating handling of arrays and maybe add recursive "un-pealing" of multidimensional arrays.
Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
Assert the invariant the typ is not Record itself
-------------
Changes:
- all: https://git.openjdk.org/panama-foreign/pull/833/files
- new: https://git.openjdk.org/panama-foreign/pull/833/files/1d7db589..36e712d6
Webrevs:
- full: https://webrevs.openjdk.org/?repo=panama-foreign&pr=833&range=02
- incr: https://webrevs.openjdk.org/?repo=panama-foreign&pr=833&range=01-02
Stats: 14 lines in 3 files changed: 9 ins; 0 del; 5 mod
Patch: https://git.openjdk.org/panama-foreign/pull/833.diff
Fetch: git fetch https://git.openjdk.org/panama-foreign.git pull/833/head:pull/833
PR: https://git.openjdk.org/panama-foreign/pull/833
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