RFR: 8340830: Console.readLine() and Console.printf() are mutually blocking [v5]

[Jaikiran Pai]

On Mon, 2 Feb 2026 22:05:03 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> 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.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added @requires condition

src/java.base/share/classes/java/io/ProxyingConsole.java line 40:

> 38:  */
> 39: @ValueBased
> 40: final class ProxyingConsole extends Console {

I am not familiar with `@ValueBased` and I just read up its documentation. Based on what it says about constructors https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/lang/doc-files/ValueBased.html#L48:

> the class does not declare (or has deprecated any) accessible constructors

since `ProxyingConsole` declares a `ProxyingConsole(JdkConsole delegate)` constructor, does it still qualify as a `@ValueBased` class?

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PR Review Comment: https://git.openjdk.org/jdk/pull/29493#discussion_r2758406203