extracted guard locking to a separate class

sync/lockable.hpp

@@ -0,0 +1,19 @@
+#ifndef MEMGRAPH_SYNC_LOCKABLE_HPP
+#define MEMGRAPH_SYNC_LOCKABLE_HPP
+
+#include <mutex>
+#include "spinlock.hpp"
+
+template <class lock_t = SpinLock>
+class Lockable
+{
+protected:
+    std::unique_lock<lock_t> acquire()
+    {
+        return std::unique_lock<lock_t>(lock);
+    }
+    
+    lock_t lock;
+};
+
+#endif