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_THREADEDDATAPROVIDER_IMPL_H_
   6 #define CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_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 namespace blink {
  18 class WebThreadedDataReceiver;
  19 }
  20
  21 namespace IPC {
  22 class SyncChannel;
  23 }
  24
  25 namespace content {
  26 class WebThreadImpl;
  27
  28 class ThreadedDataProvider {
  29  public:
  30   ThreadedDataProvider(
  31       int request_id,
  32       blink::WebThreadedDataReceiver* threaded_data_receiver,
  33       linked_ptr<base::SharedMemory> shm_buffer,
  34       int shm_size,
  35       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_);
  36   virtual ~ThreadedDataProvider();
  37
  38   void Stop();
  39   void OnReceivedDataOnBackgroundThread(int data_offset,
  40                                         int data_length,
  41                                         int encoded_data_length);
  42
  43   void OnReceivedDataOnForegroundThread(const char* data,
  44                                         int data_length,
  45                                         int encoded_data_length);
  46
  47   void OnResourceMessageFilterAddedMainThread();
  48
  49  private:
  50   void StopOnBackgroundThread();
  51   void OnResourceMessageFilterAddedBackgroundThread();
  52   void ForwardAndACKData(const char* data, int data_length);
  53
  54   scoped_refptr<IPC::MessageFilter> filter_;
  55   int request_id_;
  56   linked_ptr<base::SharedMemory> shm_buffer_;
  57   int shm_size_;
  58   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
  59       background_thread_weak_factory_;
  60   WebThreadImpl& background_thread_;
  61   IPC::SyncChannel* ipc_channel_;
  62   blink::WebThreadedDataReceiver* threaded_data_receiver_;
  63   bool resource_filter_active_;
  64   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
  65
  66   struct QueuedSharedMemoryData {
  67     const char* data;
  68     int length;
  69   };
  70   std::vector<QueuedSharedMemoryData> queued_data_;
  71
  72   base::WeakPtrFactory<ThreadedDataProvider>
  73       main_thread_weak_factory_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
  76 };
  77
  78 }  // namespace content
  79
  80 #endif  // CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_