From: Eric Wong <normalperson@yhbt.net>
To: sleepy.penguin@librelist.org
Subject: [sleepy.penguin] [PATCH 2/2] inotify: thread-safe Inotify#take for rbx
Date: Fri, 12 Apr 2013 22:25:50 +0000 [thread overview]
Message-ID: <1365805550-1593-2-git-send-email-normalperson@yhbt.net> (raw)
In-Reply-To: 1365805550-1593-1-git-send-email-normalperson@yhbt.net
Rubinius provides a Rubinius.synchronize helper for locking
objects which do not otherwise have locks. We need to
synchronize Inotify#take access to prevent the internal array
from being clobbered.
This avoids unnecessary locking overhead on MRI which maintains
a GVL.
---
lib/sleepy_penguin.rb | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/lib/sleepy_penguin.rb b/lib/sleepy_penguin.rb
index c13eb0c..1888e3b 100644
--- a/lib/sleepy_penguin.rb
+++ b/lib/sleepy_penguin.rb
@@ -6,3 +6,18 @@ module SleepyPenguin
end
require 'sleepy_penguin_ext'
require 'sleepy_penguin/epoll'
+
+# :stopdoc:
+#
+# We need to serialize Inotify#take for Rubinius since that has no GVL
+# to protect the internal array
+if defined?(SleepyPenguin::Inotify) &&
+ defined?(Rubinius) && Rubinius.respond_to?(:synchronize)
+ class SleepyPenguin::Inotify
+ alias __take take
+ undef_method :take
+ def take(*args)
+ Rubinius.synchronize(@inotify_tmp) { __take(*args) }
+ end
+ end
+end
--
1.8.2.1.366.ge2af9e3
prev parent reply other threads:[~2013-04-12 22:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-12 22:25 [sleepy.penguin] [PATCH 1/2] inotify: use thread-local internal buffer Eric Wong
2013-04-12 22:25 ` Eric Wong [this message]
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