initial implementation

include/xo/reactor/EventSource.hpp

@@ -0,0 +1,25 @@
+/* @file EventSource.hpp */
+
+#pragma once
+
+#include "reactor/ReactorSource.hpp"
+#include "callback/CallbackSet.hpp"
+
+namespace xo {
+  namespace reactor {
+    template</*typename Event,*/
+	     typename Callback
+             /*void (Callback::*member_fn)(Event const &)*/> 
+    class EventSource : public ReactorSource {
+    public:
+      using CallbackId = fn::CallbackId;
+
+    public:
+      virtual CallbackId add_callback(ref::rp<Callback> const & cb) = 0;
+      virtual void remove_callback(CallbackId id) = 0;
+    }; /*EventSource*/
+      
+  } /*namespace reactor*/
+} /*namespace xo*/
+
+/* end EventSource.hpp */