1 files changed, 11 insertions, 0 deletions
diff --git a/prelude.rb b/prelude.rb
index 6451b8f74a..8ce306caa2 100644
--- a/prelude.rb
+++ b/prelude.rb
@@ -10,3 +10,14 @@ class Mutex
   end
 end
 
+# Thread
+
+class Thread
+  MUTEX_FOR_THREAD_EXCLUSIVE = Mutex.new
+  def self.exclusive
+    MUTEX_FOR_THREAD_EXCLUSIVE.synchronize{
+      yield
+    }
+  end
+end
+