net/proxy/sync_host_resolver_bridge.h

   1 // Copyright (c) 2012 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
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "net/proxy/sync_host_resolver.h"
  11
  12 class MessageLoop;
  13
  14 namespace net {
  15
  16 // Wrapper around HostResolver to give a sync API while running the resolver
  17 // in async mode on |host_resolver_loop|.
  18 class NET_EXPORT_PRIVATE SyncHostResolverBridge : public SyncHostResolver {
  19  public:
  20   SyncHostResolverBridge(HostResolver* host_resolver,
  21                          MessageLoop* host_resolver_loop);
  22
  23   virtual ~SyncHostResolverBridge();
  24
  25   // SyncHostResolver methods:
  26   virtual int Resolve(const HostResolver::RequestInfo& info,
  27                       AddressList* addresses,
  28                       const BoundNetLog& net_log) OVERRIDE;
  29
  30   // The Shutdown() method should be called prior to destruction, from
  31   // |host_resolver_loop_|. It aborts any in progress synchronous resolves, to
  32   // prevent deadlocks from happening.
  33   virtual void Shutdown() OVERRIDE;
  34
  35  private:
  36   class Core;
  37
  38   MessageLoop* const host_resolver_loop_;
  39   scoped_refptr<Core> core_;
  40   DISALLOW_COPY_AND_ASSIGN(SyncHostResolverBridge);
  41 };
  42
  43 }  // namespace net
  44
  45 #endif  // NET_PROXY_SYNC_HOST_RESOLVER_BRIDGE_H_