initial commit

Server.hh

@@ -0,0 +1,77 @@
+#pragma once
+
+#include <event2/event.h>
+
+#include <unordered_set>
+#include <vector>
+#include <string>
+#include <memory>
+#include <thread>
+
+#include "Client.hh"
+#include "ServerState.hh"
+
+
+
+class Server {
+private:
+  struct WorkerThread {
+    Server* server;
+    int worker_num;
+    std::unique_ptr<struct event_base, void(*)(struct event_base*)> base;
+    std::unordered_set<std::unique_ptr<struct evconnlistener, void(*)(struct evconnlistener*)>> listeners;
+    std::unordered_map<struct bufferevent*, std::shared_ptr<Client>> bev_to_client;
+    std::thread t;
+    std::string thread_name;
+
+    WorkerThread(Server* server, int worker_num);
+
+    void disconnect_client(struct bufferevent* bev);
+
+    static void dispatch_on_listen_accept(struct evconnlistener* listener,
+        evutil_socket_t fd, struct sockaddr *address, int socklen, void* ctx);
+    static void dispatch_on_listen_error(struct evconnlistener* listener, void* ctx);
+    static void dispatch_on_client_input(struct bufferevent* bev, void* ctx);
+    static void dispatch_on_client_error(struct bufferevent* bev, short events,
+        void* ctx);
+    static void dispatch_check_for_thread_exit(evutil_socket_t fd, short what, void* ctx);
+  };
+
+  std::atomic<bool> should_exit;
+  std::vector<WorkerThread> threads;
+
+  std::atomic<size_t> client_count;
+  std::unordered_map<int, std::pair<GameVersion, ServerBehavior>> listen_fd_to_version_and_state;
+  std::shared_ptr<ServerState> state;
+
+  void on_listen_accept(WorkerThread& wt, struct evconnlistener *listener,
+      evutil_socket_t fd, struct sockaddr *address, int socklen);
+  void on_listen_error(WorkerThread& wt, struct evconnlistener *listener);
+  void on_client_input(WorkerThread& wt, struct bufferevent *bev);
+  void on_client_error(WorkerThread& wt, struct bufferevent *bev, short events);
+  void check_for_thread_exit(WorkerThread& wt, evutil_socket_t fd, short what);
+
+  void receive_and_process_commands(std::shared_ptr<Client> c, struct bufferevent* buf);
+
+  void process_client_connect(std::shared_ptr<Client> c);
+  void process_client_disconnect(std::shared_ptr<Client> c);
+  void process_client_command(std::shared_ptr<Client> c, const std::string& command);
+
+  void run_thread(int thread_id);
+
+public:
+  Server() = delete;
+  Server(const Server&) = delete;
+  Server(Server&&) = delete;
+  Server(std::shared_ptr<ServerState> state);
+  virtual ~Server() = default;
+
+  void listen(const std::string& socket_path, GameVersion version, ServerBehavior initial_state);
+  void listen(const std::string& addr, int port, GameVersion version, ServerBehavior initial_state);
+  void listen(int port, GameVersion version, ServerBehavior initial_state);
+  void add_socket(int fd, GameVersion version, ServerBehavior initial_state);
+
+  virtual void start();
+  virtual void schedule_stop();
+  virtual void wait_for_stop();
+};