Add place for the async timer concept

src/utils/timer/async_timer.hpp

@@ -0,0 +1,12 @@
+// Copyright 2022 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+namespace memgraph::utils::timer {}

src/utils/timer/linux_async_timer.hpp

@@ -16,19 +16,18 @@
 
 #include "utils/logging.hpp"
 
-namespace memgraph::utils {
+namespace memgraph::utils::timer {
 
 #define SIGTIMER (SIGRTMAX - 2)
 
 class AsyncTimer {
  public:
-  AsyncTimer();
   explicit AsyncTimer(double seconds);
+  AsyncTimer();
   ~AsyncTimer();
   AsyncTimer(AsyncTimer &&other) noexcept;
   // NOLINTNEXTLINE (hicpp-noexcept-move)
   AsyncTimer &operator=(AsyncTimer &&other);
-
   AsyncTimer(const AsyncTimer &) = delete;
   AsyncTimer &operator=(const AsyncTimer &) = delete;