RFR: JDK-8327444: simplify RESTARTABLE macro usage in JDK codebase

[Alan Bateman]

On Wed, 6 Mar 2024 14:25:09 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> We could maybe also use the existing https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/include/jni_md.h - what do you think ?

jni_md.h goes into the JDK run-time image (for jni.h to include) so I don't think we should be changing that.  jni_util.* is JDK internal so I think we're just missing a platform dependent include file.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18132#discussion_r1514586726