content/child/threaded_data_provider.h

   1 // Copyright 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_THREADED_DATA_PROVIDER_H_
   6 #define CONTENT_CHILD_THREADED_DATA_PROVIDER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/linked_ptr.h"
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/shared_memory.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "ipc/ipc_channel.h"
  15 #include "ipc/message_filter.h"
  16
  17 struct ResourceMsg_RequestCompleteData;
  18
  19 namespace blink {
  20 class WebThreadedDataReceiver;
  21 }
  22
  23 namespace IPC {
  24 class SyncChannel;
  25 }
  26
  27 namespace content {
  28 class ResourceDispatcher;
  29 class WebThreadImpl;
  30
  31 class ThreadedDataProvider {
  32  public:
  33   ThreadedDataProvider(
  34       int request_id,
  35       blink::WebThreadedDataReceiver* threaded_data_receiver,
  36       linked_ptr<base::SharedMemory> shm_buffer,
  37       int shm_size,
  38       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_);
  39
  40   // Any destruction of this class has to bounce via the background thread to
  41   // ensure all data is flushed; call Stop() to start this process.
  42   void Stop();
  43   void OnReceivedDataOnBackgroundThread(int data_offset,
  44                                         int data_length,
  45                                         int encoded_data_length);
  46
  47   void OnReceivedDataOnForegroundThread(const char* data,
  48                                         int data_length,
  49                                         int encoded_data_length);
  50
  51   void OnResourceMessageFilterAddedMainThread();
  52   void OnRequestCompleteForegroundThread(
  53       base::WeakPtr<ResourceDispatcher> resource_dispatcher,
  54       const ResourceMsg_RequestCompleteData& request_complete_data,
  55       const base::TimeTicks& renderer_completion_time);
  56
  57  private:
  58   ~ThreadedDataProvider();
  59   void DestructOnMainThread();
  60
  61   void StopOnBackgroundThread();
  62   void OnResourceMessageFilterAddedBackgroundThread();
  63   void OnRequestCompleteBackgroundThread(
  64       base::WeakPtr<ResourceDispatcher> resource_dispatcher,
  65       const ResourceMsg_RequestCompleteData& request_complete_data,
  66       const base::TimeTicks& renderer_completion_time);
  67   void ForwardAndACKData(const char* data,
  68                          int data_length,
  69                          int encoded_data_length);
  70   void DataNotifyForegroundThread(
  71       scoped_ptr<std::vector<char> > data_copy,
  72       int data_length,
  73       int encoded_data_length);
  74
  75   scoped_refptr<IPC::MessageFilter> filter_;
  76   int request_id_;
  77   linked_ptr<base::SharedMemory> shm_buffer_;
  78   int shm_size_;
  79   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
  80       background_thread_weak_factory_;
  81   WebThreadImpl& background_thread_;
  82   IPC::SyncChannel* ipc_channel_;
  83   blink::WebThreadedDataReceiver* threaded_data_receiver_;
  84   bool resource_filter_active_;
  85   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
  86
  87   struct QueuedSharedMemoryData {
  88     const char* data;
  89     int length;
  90     int encoded_length;
  91   };
  92   std::vector<QueuedSharedMemoryData> queued_data_;
  93
  94   base::WeakPtrFactory<ThreadedDataProvider>
  95       main_thread_weak_factory_;
  96
  97   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
  98 };
  99
 100 }  // namespace content
 101
 102 #endif  // CONTENT_CHILD_THREADED_DATA_PROVIDER_H_