diff --git a/daemon/common/global.cpp b/daemon/common/global.cpp
new file mode 100644
index 0000000..a0fd88f
--- /dev/null
+++ b/daemon/common/global.cpp
@@ -0,0 +1,100 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2019,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "common/global.hpp"
+
+namespace nfd {
+
+static thread_local unique_ptr<boost::asio::io_service> g_ioService;
+static thread_local unique_ptr<Scheduler> g_scheduler;
+static boost::asio::io_service* g_mainIoService = nullptr;
+static boost::asio::io_service* g_ribIoService = nullptr;
+
+boost::asio::io_service&
+getGlobalIoService()
+{
+  if (g_ioService == nullptr) {
+    g_ioService = make_unique<boost::asio::io_service>();
+  }
+  return *g_ioService;
+}
+
+Scheduler&
+getScheduler()
+{
+  if (g_scheduler == nullptr) {
+    g_scheduler = make_unique<Scheduler>(getGlobalIoService());
+  }
+  return *g_scheduler;
+}
+
+#ifdef WITH_TESTS
+void
+resetGlobalIoService()
+{
+  g_scheduler.reset();
+  g_ioService.reset();
+}
+#endif
+
+boost::asio::io_service&
+getMainIoService()
+{
+  BOOST_ASSERT(g_mainIoService != nullptr);
+  return *g_mainIoService;
+}
+
+boost::asio::io_service&
+getRibIoService()
+{
+  BOOST_ASSERT(g_ribIoService != nullptr);
+  return *g_ribIoService;
+}
+
+void
+setMainIoService(boost::asio::io_service* mainIo)
+{
+  g_mainIoService = mainIo;
+}
+
+void
+setRibIoService(boost::asio::io_service* ribIo)
+{
+  g_ribIoService = ribIo;
+}
+
+void
+runOnMainIoService(const std::function<void()>& f)
+{
+  getMainIoService().post(f);
+}
+
+void
+runOnRibIoService(const std::function<void()>& f)
+{
+  getRibIoService().post(f);
+}
+
+} // namespace nfd