Add Music fluctuations project and Chinese plan docs

MVS/Music fluctuations/source/event/event.h

@@ -0,0 +1,32 @@
+#pragma once
+#include <functional>
+
+using ListenerID = uint64_t;
+
+template<class... ArgTypes>
+class Event
+{
+public:
+	void a(){}
+	using Callback = std::function<void(ArgTypes...)>;
+
+	ListenerID AddListener(Callback p_callback);
+
+	ListenerID operator+=(Callback p_callback);
+
+	bool RemoveListener(ListenerID p_listenerID);
+
+	bool operator-=(ListenerID p_listenerID);
+
+	void RemoveAllListeners();
+
+	uint64_t GetListenerCount();
+
+	void Invoke(ArgTypes... p_args);
+
+private:
+	std::unordered_map<ListenerID, Callback>	m_callbacks;					//存储该事件的所有监听者
+	ListenerID									m_availableListenerID = 0;		//一个监听者ID的自增统计量
+};
+
+#include"Event.inl"