What that comes down to getting the parent to know when a thread has finished.

You could use Thread::Queue, and each thread can enqueue its id when it's finished. The parent could wait on that queue or poll it.

Or you could poll threads->list(threads::joinable) for threads you can polish off by joining. You might do that before creating a new thread, I suppose.

In reply to Re^3: using many threads and conserving stack size by gone2015
in thread using many threads and conserving stack size by danmcb

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