Fixing an issue in Console where write is blocked if other thread is waiting to read, which is caused by unnecessary read/write locks. Removing those would solve the problem, as the read/write synchronization is performed at the StreamEn/Decoder level. One unrelated change is to refactor double-checked locking with LazyConstant.
------------- Commit messages: - initial commit Changes: https://git.openjdk.org/jdk/pull/29493/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29493&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8340830 Stats: 284 lines in 4 files changed: 150 ins; 93 del; 41 mod Patch: https://git.openjdk.org/jdk/pull/29493.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/29493/head:pull/29493 PR: https://git.openjdk.org/jdk/pull/29493
