net/dns/mojo_host_resolver_impl.h

   1 // Copyright 2015 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_DNS_MOJO_HOST_RESOLVER_IMPL_H_
   6 #define NET_DNS_MOJO_HOST_RESOLVER_IMPL_H_
   7
   8 #include <set>
   9
  10 #include "base/macros.h"
  11 #include "base/threading/thread_checker.h"
  12 #include "net/interfaces/host_resolver_service.mojom.h"
  13
  14 namespace net {
  15
  16 class HostResolver;
  17
  18 // This is the implementation of the HostResolver Mojo interface.
  19 // Inbound Mojo requests are sent to the HostResolver passed into the
  20 // constructor. When destroyed, any outstanding resolver requests are cancelled.
  21 // If a request's HostResolverRequestClient is shut down, the associated
  22 // resolver request is cancelled.
  23 class MojoHostResolverImpl : public interfaces::HostResolver {
  24  public:
  25   // |resolver| is expected to outlive |this|.
  26   explicit MojoHostResolverImpl(net::HostResolver* resolver);
  27   ~MojoHostResolverImpl() override;
  28
  29  private:
  30   class Job;
  31
  32   // Removes |job| from the set of pending jobs, and deletes it.
  33   void DeleteJob(Job* job);
  34
  35   // Overridden from net::interfaces::HostResolver:
  36   void Resolve(interfaces::HostResolverRequestInfoPtr request_info,
  37                interfaces::HostResolverRequestClientPtr client) override;
  38
  39   // Resolver for resolving incoming requests. Not owned.
  40   net::HostResolver* resolver_;
  41
  42   // All pending jobs, so they can be cancelled when this service is destroyed.
  43   // Owns all jobs.
  44   std::set<Job*> pending_jobs_;
  45
  46   base::ThreadChecker thread_checker_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(MojoHostResolverImpl);
  49 };
  50
  51 }  // namespace net
  52
  53 #endif  // NET_DNS_MOJO_HOST_RESOLVER_IMPL_H_