1 files changed, 30 insertions, 0 deletions
diff --git a/lib/storage.rb b/lib/storage.rb
new file mode 100644
index 0000000..57b2548
--- /dev/null
+++ b/lib/storage.rb
@@ -0,0 +1,30 @@
+class Storage
+  def initialize(storage: {})
+    @storage = storage
+    @mutex = Mutex.new
+  end
+
+  def key?(key)
+    with_lock { @storage.key?(key) }
+  end
+
+  def [](key)
+    with_lock { @storage[key] }
+  end
+
+  def []=(key, value)
+    with_lock { @storage[key] = value }
+  end
+
+  def delete(key)
+    with_lock { @storage.delete(key) }
+  end
+
+  private
+
+  def with_lock
+    @mutex.synchronize do
+      yield
+    end
+  end
+end