重构MultiplexManager，使用字符串ID替代uint32_t，优化TCPClient和TCPServer的客户端管理

tcp/tcp_client.h

@@ -6,13 +6,16 @@
 #include <thread>
 #include <mutex>
 #include <functional>
+#include "../multiplex/multiplex_manager.h"
 
 using boost::asio::ip::tcp;
 
+class SteamNetworkingManager;
+
 // TCP Client class
 class TCPClient {
 public:
-    TCPClient(const std::string& host, int port);
+    TCPClient(const std::string& host, int port, SteamNetworkingManager* manager);
     ~TCPClient();
 
     bool connect();
@@ -22,10 +25,11 @@ public:
     void setReceiveCallback(std::function<void(const std::string&)> callback);
     void setReceiveCallback(std::function<void(const char*, size_t)> callback);
     void setDisconnectCallback(std::function<void()> callback);
+    MultiplexManager* getMultiplexManager() { return multiplexManager_.get(); }
 
 private:
-    void start_read();
-    void handle_read(const boost::system::error_code& error, std::size_t bytes_transferred);
+    void start_read(std::string id);
+    void handle_read(std::string id, const boost::system::error_code& error, std::size_t bytes_transferred);
 
     std::string host_;
     int port_;
@@ -40,4 +44,6 @@ private:
     std::function<void(const char*, size_t)> receiveCallbackBytes_;
     std::function<void()> disconnectCallback_;
     std::vector<char> buffer_;
+    SteamNetworkingManager* manager_;
+    std::unique_ptr<MultiplexManager> multiplexManager_;
 };