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From: Philipp Stephani
Newsgroups: gmane.emacs.devel
Subject: Re: master 8dcb19f 4/4: Add a unit test testing interaction between
threads and processes.
Date: Sat, 23 Jan 2021 21:33:29 +0100
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Cc: Philipp Stephani , Emacs developers
To: Eli Zaretskii
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Am Sa., 23. Jan. 2021 um 21:27 Uhr schrieb Eli Zaretskii :
>
> > Date: Sat, 23 Jan 2021 21:49:18 +0200
> > From: Eli Zaretskii
> > Cc: Philipp Stephani , emacs-devel@gnu.org
> >
> > Test process-tests/multiple-threads-waiting condition:
> > (ert-test-failed
> > ((should
> > (eql
> > (process-exit-status process)
> > 0))
> > :form
> > (eql 1 0)
> > :value nil))
> > FAILED 21/26 process-tests/multiple-threads-waiting (8.859375 sec)
>
> And if I run just this one test (using SELECTOR=...), it hangs in the
> first call to thread-join.
>
> Can you describe the idea of the test,
This test essentially implements your request to verify the
interactions between the self-pipe for SIGCHLD and threads. Seems it
discovered some issues on Windows instead! The test works fine on
GNU/Linux and macOS.
> and in particular why did you
> expect the threads to start running? IOW, which part of this test is
> supposed to force the main thread to yield so that one of the other
> threads starts running?
thread-join should yield.