Fuchsia: Partial implementation of dart:io sockets

runtime/bin/eventhandler_fuchsia.h

Index: runtime/bin/eventhandler_fuchsia.h
diff --git a/runtime/bin/eventhandler_fuchsia.h b/runtime/bin/eventhandler_fuchsia.h
index acd47937460dd17a2edf7dc5f2c16f3322e58fea..545fdb8fab4acf53bf4259ab3d35b087b331e325 100644
--- a/runtime/bin/eventhandler_fuchsia.h
+++ b/runtime/bin/eventhandler_fuchsia.h
@@ -10,7 +10,9 @@
 #endif
 
 #include <errno.h>
-#include <magenta/syscalls.h>
+#include <sys/epoll.h>
+#include <sys/socket.h>
+#include <unistd.h>
 
 #include "platform/signal_blocker.h"
 
@@ -23,8 +25,11 @@ class DescriptorInfo : public DescriptorInfoBase {
 
   virtual ~DescriptorInfo() {}
 
+  intptr_t GetPollEvents();
+
   virtual void Close() {
-    VOID_TEMP_FAILURE_RETRY(close(fd_));
+    // Should be VOID_TEMP_FAILURE_RETRY
+    VOID_NO_RETRY_EXPECTED(close(fd_));
     fd_ = -1;
   }
 
@@ -53,57 +58,37 @@ class DescriptorInfoMultiple
   DISALLOW_COPY_AND_ASSIGN(DescriptorInfoMultiple);
 };
 
-// Information needed to call mx_handle_wait_many(), and to handle events.
-class MagentaWaitManyInfo {
- public:
-  MagentaWaitManyInfo();
-  ~MagentaWaitManyInfo();
-
-  intptr_t capacity() const { return capacity_; }
-  intptr_t size() const { return size_; }
-  DescriptorInfo** descriptor_infos() const { return descriptor_infos_; }
-  mx_wait_item_t* items() const { return items_; }
-
-  void AddHandle(mx_handle_t handle, mx_signals_t signals, DescriptorInfo* di);
-  void RemoveHandle(mx_handle_t handle);
-
- private:
-  static const intptr_t kInitialCapacity = 32;
-
-  void GrowArraysIfNeeded(intptr_t desired_size);
-
-  intptr_t capacity_;
-  intptr_t size_;
-  DescriptorInfo** descriptor_infos_;
-  mx_wait_item_t* items_;
-
-  DISALLOW_COPY_AND_ASSIGN(MagentaWaitManyInfo);
-};
-
 class EventHandlerImplementation {
  public:
   EventHandlerImplementation();
   ~EventHandlerImplementation();
 
+  void UpdateEpollInstance(intptr_t old_mask, DescriptorInfo* di);
+
+  // Gets the socket data structure for a given file
+  // descriptor. Creates a new one if one is not found.
+  DescriptorInfo* GetDescriptorInfo(intptr_t fd, bool is_listening);
   void SendData(intptr_t id, Dart_Port dart_port, int64_t data);
   void Start(EventHandler* handler);
   void Shutdown();
 
-  const MagentaWaitManyInfo& info() const { return info_; }
-
  private:
+  static void Poll(uword args);
+  static void* GetHashmapKeyFromFd(intptr_t fd);
+  static uint32_t GetHashmapHashFromFd(intptr_t fd);
+
   int64_t GetTimeout() const;
-  void HandleEvents();
+  void HandleEvents(struct epoll_event* events, int size);
   void HandleTimeout();
   void WakeupHandler(intptr_t id, Dart_Port dart_port, int64_t data);
+  intptr_t GetPollEvents(intptr_t events, DescriptorInfo* di);
   void HandleInterruptFd();
-  static void Poll(uword args);
 
+  HashMap socket_map_;
   TimeoutQueue timeout_queue_;
   bool shutdown_;
-  mx_handle_t interrupt_handles_[2];
-
-  MagentaWaitManyInfo info_;
+  int interrupt_fds_[2];
+  int epoll_fd_;
 
   DISALLOW_COPY_AND_ASSIGN(EventHandlerImplementation);
 };