On Wed, 23 Nov 2022 12:40:05 GMT, Alan Bateman <[email protected]> wrote:
> The proposed updates for JDK 20 are:
>
> - ForkJoinPool.externalSubmit
> - ForkJoinWorkerThread.getQueuedTaskCount
>
> These methods will be used to improve the Thread.yield implementation for
> virtual threads. The range of alternatives explored include not exposing an
> API and protected methods such as "offerSubmission". The class description
> speaks of "external clients" and "submissions from non-ForkJoinTask clients",
> hence the proposed naming and javadoc text.
test/jdk/java/util/concurrent/tck/ForkJoinPool20Test.java line 48:
> 46: * Tests for ForkJoinPool and ForkJoinWorkerThread additions in JDK 20.
> 47: */
> 48: public class ForkJoinPool20Test extends JSR166TestCase {
The new `externalSubmit` API states:
> @implSpec
> This method is equivalent to {@link #submit(ForkJoinTask)} when called
> from a thread that is not in this pool.
Should this new test class include a test which verifies this behaviour? As far
as I can see, the new test methods that assert the queue counts are being
invoked from within a worker thread.
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PR: https://git.openjdk.org/jdk/pull/11319
