Add sdevent singleton

Avoid sdevent::event::Event reference proliferation.

Change-Id: I5c3de11e902cd9e61fdaca8f06c73d329bf4d293
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/sdevent.hpp b/sdevent.hpp
new file mode 100644
index 0000000..ba40435
--- /dev/null
+++ b/sdevent.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include "sdevent/event.hpp"
+
+namespace phosphor
+{
+namespace fan
+{
+namespace util
+{
+/** @class SDEvent
+ *  @brief DBus access delegate implementation for sdevent.
+ */
+class SDEvent
+{
+    public:
+        /** @brief Get the event loop. */
+        static auto& getEvent()
+        {
+            static auto event = sdevent::event::newDefault();
+            return event;
+        }
+};
+
+} // namespace util
+} // namespace fan
+} // namespace phosphor