[bennieswart]

Previously when the worker pool was over-saturated, the idle count would
increment after each completed job whereas it would only decrement when
it was already greater than 0.

https://bugs.python.org/issue44188

• Issue: ThreadPoolExecutor unbalanced semaphore count #88354

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[bennieswart]

First time contributing to python - please point out if I'm doing anything wrong.

[bennieswart]

This probably needs to go back to older versions all the way to 3.8 too - please advise on proper process for this if you would like me to do it.

[vstinner]

@pitrou: I know that you are a big fan of threads, would you mind to have a look?

[github-actions]

This PR is stale because it has been open for 30 days with no activity.

[pitrou]

Thank you @bennieswart . I've changed the implementation to use a Lock and an integer attribute, as the Semaphore was used as a regular counter.

[MaxwellDupre]

Looks ok to me.

[github-actions]

This PR is stale because it has been open for 30 days with no activity.