RFR: 8366121: Hotspot Style Guide should document conventions for lock-free code

[David Holmes]

This is a topic that we, at Oracle, have discussed numerous times over the years and we have some simple guidelines that never get written down properly and which we/I tend to forget and then can't locate. To remedy that I would like to capture a few very simple style rules that exist for documentation purposes not necessarily correctness.

Thanks

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Commit messages:
 - 8366121: Hotspot Style Guide should document conventions for lock-free code

Changes: https://git.openjdk.org/jdk/pull/26934/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26934&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366121
  Stats: 21 lines in 2 files changed: 21 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26934.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26934/head:pull/26934

PR: https://git.openjdk.org/jdk/pull/26934