// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * 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.
//    * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 COPYRIGHT
// OWNER OR CONTRIBUTORS 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 NET_BASE_ADDRESS_LIST_H_
#define NET_BASE_ADDRESS_LIST_H_

#include "base/ref_counted.h"

struct addrinfo;

namespace net {

// An AddressList object contains a linked list of addrinfo structures.  This
// class is designed to be copied around by value.
class AddressList {
 public:
  // Adopt the given addrinfo list in place of the existing one if any.  This
  // hands over responsibility for freeing the addrinfo list to the AddressList
  // object.
  void Adopt(struct addrinfo* head);

  // Get access to the head of the addrinfo list.
  const struct addrinfo* head() const { return data_->head; }

 private:
  struct Data : public base::RefCountedThreadSafe<Data> {
    explicit Data(struct addrinfo* ai) : head(ai) {}
    ~Data();
    struct addrinfo* head;
   private:
    Data();
  };
  scoped_refptr<Data> data_;
};

}  // namespace net

#endif  // NET_BASE_ADDRESS_LIST_H_