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/macasyncsocket.h

@@ -0,0 +1,97 @@
+/*
+ *  Copyright 2008 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.
+ */
+// MacAsyncSocket is a kind of AsyncSocket. It only creates sockets
+// of the TCP type, and does not (yet) support listen and accept. It works
+// asynchronously, which means that users of this socket should connect to
+// the various events declared in asyncsocket.h to receive notifications about
+// this socket.
+
+#ifndef WEBRTC_BASE_MACASYNCSOCKET_H__
+#define WEBRTC_BASE_MACASYNCSOCKET_H__
+
+#include <CoreFoundation/CoreFoundation.h>
+
+#include "webrtc/base/asyncsocket.h"
+#include "webrtc/base/nethelpers.h"
+
+namespace rtc {
+
+class MacBaseSocketServer;
+
+class MacAsyncSocket : public AsyncSocket, public sigslot::has_slots<> {
+ public:
+  MacAsyncSocket(MacBaseSocketServer* ss, int family);
+  virtual ~MacAsyncSocket();
+
+  bool valid() const { return source_ != NULL; }
+
+  // Socket interface
+  virtual SocketAddress GetLocalAddress() const;
+  virtual SocketAddress GetRemoteAddress() const;
+  virtual int Bind(const SocketAddress& addr);
+  virtual int Connect(const SocketAddress& addr);
+  virtual int Send(const void* buffer, size_t length);
+  virtual int SendTo(const void* buffer, size_t length,
+                     const SocketAddress& addr);
+  virtual int Recv(void* buffer, size_t length);
+  virtual int RecvFrom(void* buffer, size_t length, SocketAddress* out_addr);
+  virtual int Listen(int backlog);
+  virtual MacAsyncSocket* Accept(SocketAddress* out_addr);
+  virtual int Close();
+  virtual int GetError() const;
+  virtual void SetError(int error);
+  virtual ConnState GetState() const;
+  virtual int EstimateMTU(uint16* mtu);
+  virtual int GetOption(Option opt, int* value);
+  virtual int SetOption(Option opt, int value);
+
+  // For the MacBaseSocketServer to disable callbacks when process_io is false.
+  void EnableCallbacks();
+  void DisableCallbacks();
+
+ protected:
+  void OnResolveResult(SignalThread* thread);
+  int DoConnect(const SocketAddress& addr);
+
+ private:
+  // Creates an async socket from an existing bsd socket
+  MacAsyncSocket(MacBaseSocketServer* ss, int family, int native_socket);
+
+   // Attaches the socket to the CFRunloop and sets the wrapped bsd socket
+  // to async mode
+  void Initialize(int family);
+
+  // Translate the SocketAddress into a CFDataRef to pass to CF socket
+  // functions. Caller must call CFRelease on the result when done.
+  static CFDataRef CopyCFAddress(const SocketAddress& address);
+
+  // Callback for the underlying CFSocketRef.
+  static void MacAsyncSocketCallBack(CFSocketRef s,
+                                     CFSocketCallBackType callbackType,
+                                     CFDataRef address,
+                                     const void* data,
+                                     void* info);
+
+  MacBaseSocketServer* ss_;
+  CFSocketRef socket_;
+  int native_socket_;
+  CFRunLoopSourceRef source_;
+  int current_callbacks_;
+  bool disabled_;
+  int error_;
+  ConnState state_;
+  AsyncResolver* resolver_;
+
+  DISALLOW_EVIL_CONSTRUCTORS(MacAsyncSocket);
+};
+
+}  // namespace rtc
+
+#endif  // WEBRTC_BASE_MACASYNCSOCKET_H__