RFR: 8352042: [leyden] Parallel precompilation

[Aleksey Shipilev]

On Fri, 14 Mar 2025 20:28:10 GMT, John R Rose <jrose at openjdk.org> wrote:

> What motivated the type change on `CompileTaskAlloc_lock`? Some kind of end-of-time effect that broke the mutex grab?

We now need wait/notify, so the lock is no longer a pure `Mutex`, it is `Monitor` now.

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PR Comment: https://git.openjdk.org/leyden/pull/49#issuecomment-2725952538