From 0dc342de848a642ecce8db697b8fecd83a63e117 Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 25 Aug 2008 15:02:05 +0000
Subject: added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 trunk/prelude.rb | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 trunk/prelude.rb

(limited to 'trunk/prelude.rb')

diff --git a/trunk/prelude.rb b/trunk/prelude.rb
new file mode 100644
index 0000000000..fdf401b56a
--- /dev/null
+++ b/trunk/prelude.rb
@@ -0,0 +1,35 @@
+
+# Mutex
+
+class Mutex
+  def synchronize
+    self.lock
+    begin
+      yield
+    ensure
+      self.unlock rescue nil
+    end
+  end
+end
+
+# Thread
+
+class Thread
+  MUTEX_FOR_THREAD_EXCLUSIVE = Mutex.new
+  def self.exclusive
+    MUTEX_FOR_THREAD_EXCLUSIVE.synchronize{
+      yield
+    }
+  end
+end
+
+def require_relative(relative_feature)
+  c = caller.first
+  e = c.rindex(/:\d+:in /)
+  file = $`
+  if /\A\((.*)\)/ =~ file # eval, etc.
+    raise LoadError, "require_relative is called in #{$1}"
+  end
+  absolute_feature = File.expand_path(File.join(File.dirname(file), relative_feature))
+  require absolute_feature
+end
-- 
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