Remove SocketData and now only pass the dart port to epoll.

runtime/bin/eventhandler_linux.h

Index: runtime/bin/eventhandler_linux.h
diff --git a/runtime/bin/eventhandler_linux.h b/runtime/bin/eventhandler_linux.h
index bec36ce3ece8c0ab112384f29f23b027a4cda344..f5386c34fbca8a1808a12ae8e5ace1899759f223 100644
--- a/runtime/bin/eventhandler_linux.h
+++ b/runtime/bin/eventhandler_linux.h
@@ -20,80 +20,26 @@
 namespace dart {
 namespace bin {
 
-class InterruptMessage {
- public:
-  intptr_t id;
-  Dart_Port dart_port;
-  int64_t data;
-};
-
-
-class SocketData {
- public:
-  explicit SocketData(intptr_t fd)
-      : tracked_by_epoll_(false), fd_(fd), port_(0) {
-    ASSERT(fd_ != -1);
-  }
-
-  void ShutdownRead() {
-    shutdown(fd_, SHUT_RD);
-  }
-
-  void ShutdownWrite() {
-    shutdown(fd_, SHUT_WR);
-  }
-
-  void Close() {
-    port_ = 0;
-    close(fd_);
-    fd_ = -1;
-  }
-
-  void SetPort(Dart_Port port) {
-    ASSERT(fd_ != -1);
-    port_ = port;
-  }
-
-  intptr_t fd() { return fd_; }
-  Dart_Port port() { return port_; }
-  bool tracked_by_epoll() { return tracked_by_epoll_; }
-  void set_tracked_by_epoll(bool value) { tracked_by_epoll_ = value; }
-
- private:
-  bool tracked_by_epoll_;
-  intptr_t fd_;
-  Dart_Port port_;
-};
-
-
 class EventHandlerImplementation {
  public:
   EventHandlerImplementation();
   ~EventHandlerImplementation();
 
-  // Gets the socket data structure for a given file
-  // descriptor. Creates a new one if one is not found.
-  SocketData* GetSocketData(intptr_t fd, bool* is_new);
-  void SendData(intptr_t id, Dart_Port dart_port, int64_t data);
+  void Notify(intptr_t id, Dart_Port dart_port, int64_t data);
   void Start(EventHandler* handler);
   void Shutdown();
 
  private:
   void HandleEvents(struct epoll_event* events, int size);
   static void Poll(uword args);
-  void WakeupHandler(intptr_t id, Dart_Port dart_port, int64_t data);
-  void HandleInterruptFd();
   void SetPort(intptr_t fd, Dart_Port dart_port, intptr_t mask);
-  intptr_t GetPollEvents(intptr_t events, SocketData* sd);
-  static void* GetHashmapKeyFromFd(intptr_t fd);
-  static uint32_t GetHashmapHashFromFd(intptr_t fd);
+  intptr_t GetPollEvents(intptr_t events);
 
-  HashMap socket_map_;
   TimeoutQueue timeout_queue_;
   bool shutdown_;
-  int interrupt_fds_[2];
   int epoll_fd_;
   int timer_fd_;
+  Mutex timer_mutex_;
 };
 
 }  // namespace bin