On Mon, Feb 24, 2020 at 3:32 PM Colin Percival <cperc...@tarsnap.com> wrote:

> I'm wondering if anyone has a clear answer for how pthread_cancel should
> behave if called on a thread which has called pthread_exit (including an
> implicit call by reaching the end of its start_routine) but has not yet
> been the target of pthread_join.
>
> In particular, is it appropriate to return ESRCH in this case?
>

I don't think so, no. For joinable threads, the thread ID is valid until
pthread_join() is called. Otherwise, pthread_join() would itself would be
very difficult to use safely. Note that the same rationale text appears
under pthread_join.

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