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 scheduler {
  28 class WebThreadImplForWorkerScheduler;
  29 }
  30
  31 namespace content {
  32 class ResourceDispatcher;
  33
  34 class ThreadedDataProvider {
  35  public:
  36   ThreadedDataProvider(
  37       int request_id,
  38       blink::WebThreadedDataReceiver* threaded_data_receiver,
  39       linked_ptr<base::SharedMemory> shm_buffer,
  40       int shm_size,
  41       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_);
  42
  43   // Any destruction of this class has to bounce via the background thread to
  44   // ensure all data is flushed; call Stop() to start this process.
  45   void Stop();
  46   void OnReceivedDataOnBackgroundThread(int data_offset,
  47                                         int data_length,
  48                                         int encoded_data_length);
  49
  50   void OnReceivedDataOnForegroundThread(const char* data,
  51                                         int data_length,
  52                                         int encoded_data_length);
  53
  54   void OnResourceMessageFilterAddedMainThread();
  55   void OnRequestCompleteForegroundThread(
  56       base::WeakPtr<ResourceDispatcher> resource_dispatcher,
  57       const ResourceMsg_RequestCompleteData& request_complete_data,
  58       const base::TimeTicks& renderer_completion_time);
  59
  60  private:
  61   ~ThreadedDataProvider();
  62   void DestructOnMainThread();
  63
  64   void StopOnBackgroundThread();
  65   void OnResourceMessageFilterAddedBackgroundThread();
  66   void OnRequestCompleteBackgroundThread(
  67       base::WeakPtr<ResourceDispatcher> resource_dispatcher,
  68       const ResourceMsg_RequestCompleteData& request_complete_data,
  69       const base::TimeTicks& renderer_completion_time);
  70   void ForwardAndACKData(const char* data,
  71                          int data_length,
  72                          int encoded_data_length);
  73   void DataNotifyForegroundThread(
  74       scoped_ptr<std::vector<char> > data_copy,
  75       int data_length,
  76       int encoded_data_length);
  77
  78   scoped_refptr<IPC::MessageFilter> filter_;
  79   int request_id_;
  80   linked_ptr<base::SharedMemory> shm_buffer_;
  81   int shm_size_;
  82   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
  83       background_thread_weak_factory_;
  84   scheduler::WebThreadImplForWorkerScheduler& background_thread_;
  85   IPC::SyncChannel* ipc_channel_;
  86   blink::WebThreadedDataReceiver* threaded_data_receiver_;
  87   bool resource_filter_active_;
  88   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
  89
  90   struct QueuedSharedMemoryData {
  91     const char* data;
  92     int length;
  93     int encoded_length;
  94   };
  95   std::vector<QueuedSharedMemoryData> queued_data_;
  96
  97   base::WeakPtrFactory<ThreadedDataProvider>
  98       main_thread_weak_factory_;
  99
 100   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
 101 };
 102
 103 }  // namespace content
 104
 105 #endif  // CONTENT_CHILD_THREADED_DATA_PROVIDER_H_