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diff --git a/third_party/libjingle/files/talk/base/asyncsocket.h b/third_party/libjingle/files/talk/base/asyncsocket.h
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+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice, 
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products 
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TALK_BASE_ASYNCSOCKET_H__
+#define TALK_BASE_ASYNCSOCKET_H__
+
+#include "talk/base/sigslot.h"
+#include "talk/base/socket.h"
+
+namespace talk_base {
+
+// Provides the ability to perform socket I/O asynchronously.
+class AsyncSocket : public Socket, public sigslot::has_slots<>  {
+public:
+  virtual ~AsyncSocket() {}
+
+  sigslot::signal1<AsyncSocket*> SignalReadEvent;  // ready to read
+  sigslot::signal1<AsyncSocket*> SignalWriteEvent; // ready to write
+  sigslot::signal1<AsyncSocket*> SignalConnectEvent; // connected
+  sigslot::signal2<AsyncSocket*,int> SignalCloseEvent; // closed
+  // TODO: error
+};
+
+class AsyncSocketAdapter : public AsyncSocket {
+public:
+  AsyncSocketAdapter(Socket * socket) : socket_(socket) {
+  }
+  AsyncSocketAdapter(AsyncSocket * socket) : socket_(socket) {
+    socket->SignalConnectEvent.connect(this, &AsyncSocketAdapter::OnConnectEvent);
+    socket->SignalReadEvent.connect(this, &AsyncSocketAdapter::OnReadEvent);
+    socket->SignalWriteEvent.connect(this, &AsyncSocketAdapter::OnWriteEvent);
+    socket->SignalCloseEvent.connect(this, &AsyncSocketAdapter::OnCloseEvent);
+  }
+  virtual ~AsyncSocketAdapter() { delete socket_; }
+
+  virtual SocketAddress GetLocalAddress() const { return socket_->GetLocalAddress(); }
+  virtual SocketAddress GetRemoteAddress() const { return socket_->GetRemoteAddress(); }
+
+  virtual int Bind(const SocketAddress& addr) { return socket_->Bind(addr); }
+  virtual int Connect(const SocketAddress& addr) {return socket_->Connect(addr); }
+  virtual int Send(const void *pv, size_t cb) { return socket_->Send(pv, cb); }
+  virtual int SendTo(const void *pv, size_t cb, const SocketAddress& addr) { return socket_->SendTo(pv, cb, addr); }
+  virtual int Recv(void *pv, size_t cb) { return socket_->Recv(pv, cb); }
+  virtual int RecvFrom(void *pv, size_t cb, SocketAddress *paddr) { return socket_->RecvFrom(pv, cb, paddr); }
+  virtual int Listen(int backlog) { return socket_->Listen(backlog); }
+  virtual Socket *Accept(SocketAddress *paddr) { return socket_->Accept(paddr); }
+  virtual int Close() { return socket_->Close(); }
+  virtual int GetError() const { return socket_->GetError(); }
+  virtual void SetError(int error) { return socket_->SetError(error); }
+
+  virtual ConnState GetState() const { return socket_->GetState(); }
+
+  virtual int EstimateMTU(uint16* mtu) { return socket_->EstimateMTU(mtu); }
+  virtual int SetOption(Option opt, int value) { return socket_->SetOption(opt, value); }
+
+protected:
+  virtual void OnConnectEvent(AsyncSocket * socket) { SignalConnectEvent(this); }
+  virtual void OnReadEvent(AsyncSocket * socket) { SignalReadEvent(this); }
+  virtual void OnWriteEvent(AsyncSocket * socket) { SignalWriteEvent(this); }
+  virtual void OnCloseEvent(AsyncSocket * socket, int err) { SignalCloseEvent(this, err); }
+
+  Socket * socket_;
+};
+
+} // namespace talk_base
+
+#endif // TALK_BASE_ASYNCSOCKET_H__