content/child/resource_scheduling_filter.h

   1 // Copyright (c) 2014 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 CONTENT_CHILD_RESOURCE_SCHEDULING_FILTER_H_
   6 #define CONTENT_CHILD_RESOURCE_SCHEDULING_FILTER_H_
   7
   8 #include "base/containers/hash_tables.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "content/common/content_export.h"
  12 #include "ipc/message_filter.h"
  13
  14 namespace content {
  15 class ResourceDispatcher;
  16
  17 // This filter is used to dispatch resource messages on a specific
  18 // SingleThreadTaskRunner to facilitate task scheduling.
  19 class CONTENT_EXPORT ResourceSchedulingFilter : public IPC::MessageFilter {
  20  public:
  21   ResourceSchedulingFilter(const scoped_refptr<base::SingleThreadTaskRunner>&
  22                                main_thread_task_runner,
  23                            ResourceDispatcher* resource_dispatcher);
  24
  25   // IPC::MessageFilter overrides:
  26   bool OnMessageReceived(const IPC::Message& message) override;
  27
  28   bool GetSupportedMessageClasses(
  29       std::vector<uint32>* supported_message_classes) const override;
  30
  31  protected:
  32   ~ResourceSchedulingFilter() override;
  33
  34   void DispatchMessage(const IPC::Message& message);
  35
  36   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
  37   ResourceDispatcher* resource_dispatcher_;  // NOT OWNED
  38   base::WeakPtrFactory<ResourceSchedulingFilter> weak_ptr_factory_;
  39
  40  private:
  41   DISALLOW_COPY_AND_ASSIGN(ResourceSchedulingFilter);
  42 };
  43
  44 }  // namespace content
  45
  46 #endif  // CONTENT_CHILD_RESOURCE_SCHEDULING_FILTER_H_