[foreign-jextract] RFR: 8252931: Extend multiple constant classes support to ClassConstantHelper [v2]

[Jorn Vernee]

On Wed, 9 Sep 2020 10:10:56 GMT, Athijegannathan Sundararajan <sundar at openjdk.org> wrote:

>> Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Have a separate constants per class limit for binary generation
>
> src/jdk.incubator.jextract/share/classes/jdk/internal/jextract/impl/MultiFileConstantHelper.java line 38:
> 
>> 36: public class MultiFileConstantHelper implements ConstantHelper {
>> 37:
>> 38:     private static final int CONSTANTS_PER_CLASS = Integer.getInteger("jextract.constants.per.class", 1000);
> 
> This limit was empirically found by running source constant helper on samples (like lapack, python, libgit2). I'd
> recommend doing similar experiment with binary constant helper and arrive at suitable threshold.

I've updated the code. The limit for binary generation is set to 10000 (found by extracting Windows.h)

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PR: https://git.openjdk.java.net/panama-foreign/pull/314