Revert "Introduce optional 'bool shared' parameter to ServerSocket.bind() ..."

dart/runtime/bin/eventhandler_macos.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_EVENTHANDLER_MACOS_H_
 #define BIN_EVENTHANDLER_MACOS_H_
 
 #if !defined(BIN_EVENTHANDLER_H_)
 #error Do not include eventhandler_macos.h directly; use eventhandler.h instead.
 #endif
 
 #include <errno.h>
 #include <sys/event.h>  // NOLINT
 #include <sys/socket.h>
 #include <unistd.h>
 
 #include "platform/hashmap.h"
 #include "platform/signal_blocker.h"
 
 
 namespace dart {
 namespace bin {
 
-class DescriptorInfo : public DescriptorInfoBase {
+class InterruptMessage {
  public:
-  explicit DescriptorInfo(intptr_t fd)
-      : DescriptorInfoBase(fd), tracked_by_kqueue_(false) { }
+  intptr_t id;
+  Dart_Port dart_port;
+  int64_t data;
+};
 
-  virtual ~DescriptorInfo() { }
 
-  intptr_t GetPollEvents();
-
-  virtual void Close() {
-    VOID_TEMP_FAILURE_RETRY(close(fd_));
-    fd_ = -1;
+class SocketData {
+ public:
+  explicit SocketData(intptr_t fd)
+      : fd_(fd),
+        port_(0),
+        mask_(0),
+        tracked_by_kqueue_(false),
+        tokens_(16) {
+    ASSERT(fd_ != -1);
   }
 
+  bool HasReadEvent();
+  bool HasWriteEvent();
+
+  bool IsListeningSocket() { return (mask_ & (1 << kListeningSocket)) != 0; }
+
+  void SetPortAndMask(Dart_Port port, intptr_t mask) {
+    ASSERT(fd_ != -1);
+    port_ = port;
+    mask_ = mask;
+  }
+
+  intptr_t fd() { return fd_; }
+  Dart_Port port() { return port_; }
+  intptr_t mask() { return mask_; }
+  bool tracked_by_kqueue() { return tracked_by_kqueue_; }
   void set_tracked_by_kqueue(bool value) {
     tracked_by_kqueue_ = value;
   }
 
-  bool tracked_by_kqueue() { return tracked_by_kqueue_; }
+  // Returns true if the last token was taken.
+  bool TakeToken() {
+    tokens_--;
+    return tokens_ == 0;
+  }
 
-  bool HasReadEvent();
+  // Returns true if the tokens was 0 before adding.
+  bool ReturnToken() {
+    tokens_++;
+    return tokens_ == 1;
+  }
 
-  bool HasWriteEvent();
-
- protected:
+ private:
+  intptr_t fd_;
+  Dart_Port port_;
+  intptr_t mask_;
   bool tracked_by_kqueue_;
+  int tokens_;
 };
 
 
-class DescriptorInfoSingle
-    : public DescriptorInfoSingleMixin<DescriptorInfo> {
- public:
-  explicit DescriptorInfoSingle(intptr_t fd)
-      : DescriptorInfoSingleMixin(fd) {}
-  virtual ~DescriptorInfoSingle() {}
-};
-
-
-class DescriptorInfoMultiple
-    : public DescriptorInfoMultipleMixin<DescriptorInfo> {
- public:
-  explicit DescriptorInfoMultiple(intptr_t fd)
-      : DescriptorInfoMultipleMixin(fd) {}
-  virtual ~DescriptorInfoMultiple() {}
-};
-
-
 class EventHandlerImplementation {
  public:
   EventHandlerImplementation();
   ~EventHandlerImplementation();
 
   // 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);
+  SocketData* GetSocketData(intptr_t fd);
   void SendData(intptr_t id, Dart_Port dart_port, int64_t data);
   void Start(EventHandler* handler);
   void Shutdown();
 
  private:
   int64_t GetTimeout();
   void HandleEvents(struct kevent* events, int size);
   void HandleTimeout();
   static void EventHandlerEntry(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 GetEvents(struct kevent* event, DescriptorInfo* di);
+  intptr_t GetEvents(struct kevent* event, SocketData* sd);
   static void* GetHashmapKeyFromFd(intptr_t fd);
   static uint32_t GetHashmapHashFromFd(intptr_t fd);
 
   HashMap socket_map_;
   TimeoutQueue timeout_queue_;
   bool shutdown_;
   int interrupt_fds_[2];
   int kqueue_fd_;
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_EVENTHANDLER_MACOS_H_