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      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 webkit_glue {
     26 class WebThreadImpl;
     27 }
     28 
     29 namespace content {
     30 class ResourceDispatcher;
     31 class WebThreadImpl;
     32 
     33 class ThreadedDataProvider {
     34  public:
     35   ThreadedDataProvider(
     36       int request_id,
     37       blink::WebThreadedDataReceiver* threaded_data_receiver,
     38       linked_ptr<base::SharedMemory> shm_buffer,
     39       int shm_size);
     40   virtual ~ThreadedDataProvider();
     41 
     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 
     53  private:
     54   void StopOnBackgroundThread();
     55   void OnResourceMessageFilterAddedBackgroundThread();
     56   void ForwardAndACKData(const char* data, int data_length);
     57 
     58   scoped_refptr<IPC::MessageFilter> filter_;
     59   int request_id_;
     60   linked_ptr<base::SharedMemory> shm_buffer_;
     61   int shm_size_;
     62   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
     63       background_thread_weak_factory_;
     64   base::WeakPtrFactory<ThreadedDataProvider>
     65       main_thread_weak_factory_;
     66   WebThreadImpl& background_thread_;
     67   IPC::SyncChannel* ipc_channel_;
     68   blink::WebThreadedDataReceiver* threaded_data_receiver_;
     69   bool resource_filter_active_;
     70   base::MessageLoop* main_thread_message_loop_;
     71 
     72   struct QueuedSharedMemoryData {
     73     const char* data;
     74     int length;
     75   };
     76   std::vector<QueuedSharedMemoryData> queued_data_;
     77 
     78   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
     79 };
     80 
     81 }  // namespace content
     82 
     83 #endif  // CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_
     84