picloud data send and receive, not tested

libs/main/cloud/picloudserver.h

@@ -40,6 +40,7 @@ public:
 		friend class PICloudServer;
 	public:
 		Client(PICloudServer * srv = nullptr, uint id = 0);
+		virtual ~Client();
 	protected:
 		bool openDevice();
 		bool closeDevice();
@@ -53,6 +54,7 @@ public:
 		PIByteArray buff;
 		PIMutex mutex_buff;
 		PIConditionVariable cond_buff;
+		std::atomic_bool is_connected;
 	};
 
 	void setServerName(const PIString & server_name);