Initial Code

include/event.hpp

@@ -0,0 +1,64 @@
+/*
+Low Latency IPC Library for high-speed traffic
+Copyright (C) 2019  Michael Fabian Dirks <info@xaymar.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program 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 Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+#include <functional>
+#include <list>
+
+namespace datapath {
+	template<typename... _args>
+	class event {
+		std::list<std::function<void(_args...)>> listeners;
+
+		public:
+		void add(std::function<void(_args...)> listener)
+		{
+			listeners.push_back(listener);
+		}
+
+		void remove(std::function<void(_args...)> listener)
+		{
+			listeners.remove(listener);
+		}
+
+		// Not valid without the extra template.
+		template<typename... _largs>
+		void operator()(_largs... args)
+		{
+			for (auto& l : listeners) {
+				l(args...);
+			}
+		}
+
+		operator bool()
+		{
+			return !listeners.empty();
+		}
+
+		public:
+		bool empty()
+		{
+			return listeners.empty();
+		}
+
+		void clear()
+		{
+			listeners.clear();
+		}
+	};
+}; // namespace datapath