RFR: 8323807: Async UL: Add a stalling mode to async UL [v8]

Wed Jan 22 15:05:53 UTC 2025

On Wed, 22 Jan 2025 14:52:07 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

> I think to me the two signals is more confusing.

I should have said that having two properties being signalled by one variable is confusing. What I wrote still have two signals. It is just that `_data_availiable` is used to signal "there is something to consume". While `_stalled_msg` signals "a stalled message has been consumed". While currently `_data_availiable` and `_stalled_message` signals "there is something to consume" together and `_stalled_msg` also signals "a stalled message has been consumed". So the meaning of the `_stalled_message` signal is contextual.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22770#discussion_r1925480333