1// Copyright (c) 2011 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef NET_PROXY_SYNC_HOST_RESOLVER_BRIDGE_H_
6#define NET_PROXY_SYNC_HOST_RESOLVER_BRIDGE_H_
7#pragma once
8
9#include "base/memory/scoped_ptr.h"
10#include "net/base/host_resolver.h"
11
12class MessageLoop;
13
14namespace net {
15
16// Wrapper around HostResolver to give a sync API while running the resolver
17// in async mode on |host_resolver_loop|.
18class SyncHostResolverBridge : public HostResolver {
19 public:
20  SyncHostResolverBridge(HostResolver* host_resolver,
21                         MessageLoop* host_resolver_loop);
22
23  virtual ~SyncHostResolverBridge();
24
25  // HostResolver methods:
26  virtual int Resolve(const RequestInfo& info,
27                      AddressList* addresses,
28                      CompletionCallback* callback,
29                      RequestHandle* out_req,
30                      const BoundNetLog& net_log);
31  virtual void CancelRequest(RequestHandle req);
32  virtual void AddObserver(Observer* observer);
33  virtual void RemoveObserver(Observer* observer);
34
35  // The Shutdown() method should be called prior to destruction, from
36  // |host_resolver_loop_|. It aborts any in progress synchronous resolves, to
37  // prevent deadlocks from happening.
38  virtual void Shutdown();
39
40 private:
41  class Core;
42
43  MessageLoop* const host_resolver_loop_;
44  scoped_refptr<Core> core_;
45};
46
47}  // namespace net
48
49#endif  // NET_PROXY_SYNC_HOST_RESOLVER_BRIDGE_H_
50