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Date: Fri, 12 Jul 2019 17:33:51 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: Kenton Varda <kenton AT cloudflare DOT com>
Cc: cygwin AT cygwin DOT com
Subject: Re: sigpending() incorrectly returns signals pending on other threads
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On Jul  6 19:15, Kenton Varda wrote:
> I found a second problem which may or may not be related:
>=20
> If two threads use pthread_kill() to send each other the same signal,
> such that the signal should be separately pending on both threads at
> the same time, only one of the two signals is actually queued. It
> seems that pthread_kill() is ignored if the same signal is already
> pending on some other thread.

The current signal mechanism in Cygwin only allows for a signal to be
queued once.  Changing that is a pretty ambitioned task, which I simply
don't have enought time for.  However, patches to change that are more
than welcome.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

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