From: Uli Schlachter <psychon@znc.in>
Date: Mon, 24 Sep 2012 20:07:51 +0000 (+0200)
Subject: Fix a multi-thread deadlock
X-Git-Url: http://git.demorecorder.com/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23911a707b8845bff52cd7853fc5d59fb0823cef;hp=23911a707b8845bff52cd7853fc5d59fb0823cef;p=free-sw%2Fxcb%2Flibxcb

Fix a multi-thread deadlock

This fixes a deadlock which was seen in-the-wild with wine.

It could happen that two threads tried to read from the socket at the same time
and one of the thread got stuck inside of poll()/select().

The fix works by making sure that the writing thread doesn't steal the reading
thread's reply.

Debugged-by: Erich Hoover <ehoover@mines.edu>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54671
Signed-off-by: Uli Schlachter <psychon@znc.in>
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