Release ascs::socket's function void id(uint_fast64_t id) for single client (both tcp and udp).

examples/unix_socket/unix_socket.cpp

@@ -26,6 +26,11 @@ int main(int argc, const char* argv[])
 	server.set_server_addr(UNIX_SOCKET_NAME);
 	client.set_server_addr(UNIX_SOCKET_NAME);
 
+	//demonstrate how to set/get single client's id, and how to set/get i_service's id.
+	//we need specific conversion for i_service because it has the same function name as single client does.
+	client.id(10000);
+	std::cout << client.id() << " : " << ((service_pump::i_service&) client).id() << std::endl;
+
 	sp.start_service();
 	while(sp.is_running())
 	{

include/ascs/socket.h

@@ -566,7 +566,8 @@ private:
 
 	//please do not change id at runtime via the following function, except this socket is not managed by object_pool,
 	//it should only be used by object_pool when reusing or creating new socket.
-	template<typename Object> friend class object_pool;
+	template<typename> friend class object_pool;
+	template<typename> friend class single_socket_service;
 	void id(uint_fast64_t id) {_id = id;}
 
 #ifdef ASCS_SYNC_RECV

include/ascs/socket_service.h

@@ -26,12 +26,14 @@ public:
 	single_socket_service(service_pump& service_pump_) : i_service(service_pump_), Socket(service_pump_) {}
 	template<typename Arg> single_socket_service(service_pump& service_pump_, Arg&& arg) : i_service(service_pump_), Socket(service_pump_, std::forward<Arg>(arg)) {}
 
+	using Socket::id; //release these functions
+
 protected:
 	virtual bool init() {this->start(); return Socket::started();}
 	virtual void uninit() {this->graceful_shutdown();} //if you wanna force shutdown, call force_shutdown before service_pump::stop_service invocation.
 
 private:
-	using Socket::get_matrix;
+	using Socket::get_matrix; //hide this function
 };
 
 template<typename Socket, typename Pool, typename Matrix>