1 files changed, 14 insertions, 0 deletions
diff --git a/prelude.rb b/prelude.rb
new file mode 100644
index 0000000000..423c9c423e
--- /dev/null
+++ b/prelude.rb
@@ -0,0 +1,14 @@
+
+# Mutex
+
+class Mutex
+  class Mutex
+    def synchronize
+      self.lock
+      yield
+    ensure
+      self.unlock
+    end
+  end
+end
+