diff --git a/inc/utils.hpp b/inc/utils.hpp
index 27e66f3..5f01d44 100644
--- a/inc/utils.hpp
+++ b/inc/utils.hpp
@@ -23,18 +23,41 @@
 #include <experimental/filesystem>
 #include <boost/asio.hpp>
 
-static constexpr const char *sysdActionStartUnit = "StartUnit";
-static constexpr const char *sysdActionStopUnit = "StopUnit";
+static constexpr const char *sysdStartUnit = "StartUnit";
+static constexpr const char *sysdStopUnit = "StopUnit";
+static constexpr const char *sysdRestartUnit = "RestartUnit";
+static constexpr const char *sysdReloadMethod = "Reload";
+static constexpr const char *sysdGetJobMethod = "GetJob";
+static constexpr const char *sysdReplaceMode = "replace";
+static constexpr const char *dBusGetAllMethod = "GetAll";
+static constexpr const char *dBusGetMethod = "Get";
+static constexpr const char *sysdService = "org.freedesktop.systemd1";
+static constexpr const char *sysdObjPath = "/org/freedesktop/systemd1";
+static constexpr const char *sysdMgrIntf = "org.freedesktop.systemd1.Manager";
+static constexpr const char *sysdUnitIntf = "org.freedesktop.systemd1.Unit";
+static constexpr const char *sysdSocketIntf = "org.freedesktop.systemd1.Socket";
+static constexpr const char *dBusPropIntf = "org.freedesktop.DBus.Properties";
+static constexpr const char *stateMasked = "masked";
+static constexpr const char *stateEnabled = "enabled";
+static constexpr const char *stateDisabled = "disabled";
+static constexpr const char *subStateRunning = "running";
+
+static inline std::string addInstanceName(const std::string &instanceName,
+                                          const std::string &suffix)
+{
+    return (instanceName.empty() ? "" : suffix + instanceName);
+}
 
 void systemdDaemonReload(
-    const std::shared_ptr<sdbusplus::asio::connection> &conn);
+    const std::shared_ptr<sdbusplus::asio::connection> &conn,
+    boost::asio::yield_context yield);
 
 void systemdUnitAction(const std::shared_ptr<sdbusplus::asio::connection> &conn,
+                       boost::asio::yield_context yield,
                        const std::string &unitName,
                        const std::string &actionMethod);
 
 void systemdUnitFilesStateChange(
     const std::shared_ptr<sdbusplus::asio::connection> &conn,
-    const std::vector<std::string> &unitFiles, const std::string &unitState);
-
-bool checkSystemdUnitExist(const std::string &unitName);
+    boost::asio::yield_context yield, const std::vector<std::string> &unitFiles,
+    const std::string &unitState, bool maskedState, bool enabledState);