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bug#22789: 25.1.50; In last master build https connections stop working
From: |
Eli Zaretskii |
Subject: |
bug#22789: 25.1.50; In last master build https connections stop working |
Date: |
Mon, 07 Mar 2016 18:08:55 +0200 |
> From: Alain Schneble <a.s@realize.ch>
> CC: <larsi@gnus.org>, <j_l_domenech@yahoo.com>, <22789@debbugs.gnu.org>
> Date: Mon, 7 Mar 2016 09:49:00 +0100
>
> > (I'll try to search the wisock documentation tomorrow to
> > find some hints that lead in this direction, or maybe you know?)
>
> IIUC, this could be the reason why it fails:
>
> - The reader_thread in w32proc.c calls _sys_wait_connect which in turn
> does a WSAEventSelect.
>
> - The documentation says:
>
> https://msdn.microsoft.com/en-us/library/windows/desktop/ms738573(v=vs.85).aspx
>
> The WSAAsyncSelect and WSAEventSelect functions automatically set a
> socket to nonblocking mode. If WSAAsyncSelect or WSAEventSelect has
> been issued on a socket, then any attempt to use ioctlsocket to set
> the socket back to blocking mode will fail with WSAEINVAL.
>
> - So there /is/ a dependency between these calls. Unfortunately, I
> couldn't see that ioctlsocket returns with WSAEINVAL in the scenarios
> I tried.
Yes, I know about this gotcha. It's just that it never produced any
problems, and I never was able to see the ioctlsocket call fail with
WSAEINVAL.
> Could it be a multi-threading issue then? Multiple threads
> accessing the same socket...
Not sure I follow -- are you trying to explain why ioctlsocket doesn't
fail as expected, or are you trying to explain some other phenomenon?
> I don't see how both threads are synchronized.
The synchronization is between reader_thread and sys_select. The
latter runs in the main (a.k.a. "Lisp") thread, the same thread where
sys_write is called.
> The patch I sent would synchronize them through the FILE_CONNECT
> flag, I think. Did I miss something?
Well, that's not really "thread synchronization", but see my comments
and questions there.
Thanks.
- bug#22789: 25.1.50; In last master build https connections stop working, (continued)
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/04
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/04
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/04
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/04
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/05
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/05
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/05
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/06
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/06
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working,
Eli Zaretskii <=
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/07
- bug#22789: 25.1.50; In last master build https connections stop working, Eli Zaretskii, 2016/03/08
- bug#22789: 25.1.50; In last master build https connections stop working, Alain Schneble, 2016/03/08