From 4e42b60205ebb2ead8535e77658ccffb206346f1 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Thu, 15 Oct 2015 01:37:33 +0000
Subject: speed up QUIT for users of the unicorn worker_loop

WriterThreadPool, WriterThreadSpawn, Base, and potentially
other rarely-used concurrency options experienced slow shutdowns
due to the destruction of a listener socket failing to wake up
a thread in IO.select.

Send ourselves a signal to interrupt the IO.select call in
the main thread to force the wakeup.
---
 lib/rainbows.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/rainbows.rb b/lib/rainbows.rb
index 3bebf34..0af5620 100644
--- a/lib/rainbows.rb
+++ b/lib/rainbows.rb
@@ -93,6 +93,9 @@ module Rainbows
       @readers.clear
       tmp.each { |s| s.close rescue nil }.clear
       @at_quit.each { |task| task.call }
+
+      # XXX hack to break out of IO.select in worker_loop for some models
+      Process.kill(:QUIT, $$)
     end
     false
   end
-- 
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