[foreign-jextract] [Rev 01] RFR: 8246341: jextract should generate Cpointer utilities class

[Jorn Vernee]

On Tue, 2 Jun 2020 14:55:08 GMT, Athijegannathan Sundararajan <sundar at openjdk.org> wrote:

>> Added Cpointer utilities class to deal with pointer values from C code.
>
> Athijegannathan Sundararajan has updated the pull request incrementally with one additional commit since the last
> revision:
>   * missed EXPORT for 'func'
>   * missed func call and assertion to check callback was reached.
>   * renamed "resize" to "asArray"

Marked as reviewed by jvernee (Committer).

src/jdk.incubator.jextract/share/classes/jdk/incubator/jextract/tool/resources/Cpointer.java.template line 22:

> 21:     private static MemoryAddress get(MemoryAddress addr) {
> 22:         return MemoryAddress.ofLong((long) handle.get(addr));
> 23:     }

Instead of doing the conversion manually here, you could also use the `MemoryHandles::asAddressVarHandle` conbinator to
create varhandles that accept and return a MemoryAddress directly.

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PR: https://git.openjdk.java.net/panama-foreign/pull/191