Update talk to 56619788

R=wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/3839005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5120 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/base/asyncresolverinterface.h

@@ -0,0 +1,64 @@
+/*
+ * libjingle
+ * Copyright 2013, 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_ASYNCRESOLVERINTERFACE_H_
+#define TALK_BASE_ASYNCRESOLVERINTERFACE_H_
+
+#include "talk/base/sigslot.h"
+#include "talk/base/socketaddress.h"
+
+namespace talk_base {
+
+// This interface defines the methods to resolve the address asynchronously.
+class AsyncResolverInterface {
+ public:
+  AsyncResolverInterface() {}
+  virtual ~AsyncResolverInterface() {}
+
+  // Start address resolve process.
+  virtual void Start(const SocketAddress& addr) = 0;
+  // Returns top most resolved address of |family|
+  virtual bool GetResolvedAddress(int family, SocketAddress* addr) const = 0;
+  // Returns error from resolver.
+  virtual int GetError() const = 0;
+  // Delete the resolver.
+  virtual void Destroy(bool wait) = 0;
+  // Returns top most resolved IPv4 address if address is resolved successfully.
+  // Otherwise returns address set in SetAddress.
+  SocketAddress address() const {
+    SocketAddress addr;
+    GetResolvedAddress(AF_INET, &addr);
+    return addr;
+  }
+
+  // This signal is fired when address resolve process is completed.
+  sigslot::signal1<AsyncResolverInterface*> SignalDone;
+};
+
+}  // namespace talk_base
+
+#endif