Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/macsocketserver.h

@@ -0,0 +1,136 @@
+/*
+ *  Copyright 2007 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef WEBRTC_BASE_MACSOCKETSERVER_H__
+#define WEBRTC_BASE_MACSOCKETSERVER_H__
+
+#include <set>
+#if defined(WEBRTC_MAC) && !defined(WEBRTC_IOS) // Invalid on IOS
+#include <Carbon/Carbon.h>
+#endif
+#include "webrtc/base/physicalsocketserver.h"
+
+namespace rtc {
+
+///////////////////////////////////////////////////////////////////////////////
+// MacBaseSocketServer
+///////////////////////////////////////////////////////////////////////////////
+class MacAsyncSocket;
+
+class MacBaseSocketServer : public PhysicalSocketServer {
+ public:
+  MacBaseSocketServer();
+  virtual ~MacBaseSocketServer();
+
+  // SocketServer Interface
+  virtual Socket* CreateSocket(int type) { return NULL; }
+  virtual Socket* CreateSocket(int family, int type) { return NULL; }
+
+  virtual AsyncSocket* CreateAsyncSocket(int type);
+  virtual AsyncSocket* CreateAsyncSocket(int family, int type);
+
+  virtual bool Wait(int cms, bool process_io) = 0;
+  virtual void WakeUp() = 0;
+
+  void RegisterSocket(MacAsyncSocket* socket);
+  void UnregisterSocket(MacAsyncSocket* socket);
+
+  // PhysicalSocketServer Overrides
+  virtual bool SetPosixSignalHandler(int signum, void (*handler)(int));
+
+ protected:
+  void EnableSocketCallbacks(bool enable);
+  const std::set<MacAsyncSocket*>& sockets() {
+    return sockets_;
+  }
+
+ private:
+  static void FileDescriptorCallback(CFFileDescriptorRef ref,
+                                     CFOptionFlags flags,
+                                     void* context);
+
+  std::set<MacAsyncSocket*> sockets_;
+};
+
+// Core Foundation implementation of the socket server. While idle it
+// will run the current CF run loop. When the socket server has work
+// to do the run loop will be paused. Does not support Carbon or Cocoa
+// UI interaction.
+class MacCFSocketServer : public MacBaseSocketServer {
+ public:
+  MacCFSocketServer();
+  virtual ~MacCFSocketServer();
+
+  // SocketServer Interface
+  virtual bool Wait(int cms, bool process_io);
+  virtual void WakeUp();
+  void OnWakeUpCallback();
+
+ private:
+  CFRunLoopRef run_loop_;
+  CFRunLoopSourceRef wake_up_;
+};
+
+#ifndef CARBON_DEPRECATED
+
+///////////////////////////////////////////////////////////////////////////////
+// MacCarbonSocketServer
+///////////////////////////////////////////////////////////////////////////////
+
+// Interacts with the Carbon event queue. While idle it will block,
+// waiting for events. When the socket server has work to do, it will
+// post a 'wake up' event to the queue, causing the thread to exit the
+// event loop until the next call to Wait. Other events are dispatched
+// to their target. Supports Carbon and Cocoa UI interaction.
+class MacCarbonSocketServer : public MacBaseSocketServer {
+ public:
+  MacCarbonSocketServer();
+  virtual ~MacCarbonSocketServer();
+
+  // SocketServer Interface
+  virtual bool Wait(int cms, bool process_io);
+  virtual void WakeUp();
+
+ private:
+  EventQueueRef event_queue_;
+  EventRef wake_up_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// MacCarbonAppSocketServer
+///////////////////////////////////////////////////////////////////////////////
+
+// Runs the Carbon application event loop on the current thread while
+// idle. When the socket server has work to do, it will post an event
+// to the queue, causing the thread to exit the event loop until the
+// next call to Wait. Other events are automatically dispatched to
+// their target.
+class MacCarbonAppSocketServer : public MacBaseSocketServer {
+ public:
+  MacCarbonAppSocketServer();
+  virtual ~MacCarbonAppSocketServer();
+
+  // SocketServer Interface
+  virtual bool Wait(int cms, bool process_io);
+  virtual void WakeUp();
+
+ private:
+  static OSStatus WakeUpEventHandler(EventHandlerCallRef next, EventRef event,
+                                     void *data);
+  static void TimerHandler(EventLoopTimerRef timer, void *data);
+
+  EventQueueRef event_queue_;
+  EventHandlerRef event_handler_;
+  EventLoopTimerRef timer_;
+};
+
+#endif
+} // namespace rtc
+
+#endif  // WEBRTC_BASE_MACSOCKETSERVER_H__