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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 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   virtual ~ThreadedDataProvider();
     36 
     37   void Stop();
     38   void OnReceivedDataOnBackgroundThread(int data_offset,
     39                                         int data_length,
     40                                         int encoded_data_length);
     41 
     42   void OnReceivedDataOnForegroundThread(const char* data,
     43                                         int data_length,
     44                                         int encoded_data_length);
     45 
     46   void OnResourceMessageFilterAddedMainThread();
     47 
     48  private:
     49   void StopOnBackgroundThread();
     50   void OnResourceMessageFilterAddedBackgroundThread();
     51   void ForwardAndACKData(const char* data, int data_length);
     52 
     53   scoped_refptr<IPC::MessageFilter> filter_;
     54   int request_id_;
     55   linked_ptr<base::SharedMemory> shm_buffer_;
     56   int shm_size_;
     57   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
     58       background_thread_weak_factory_;
     59   WebThreadImpl& background_thread_;
     60   IPC::SyncChannel* ipc_channel_;
     61   blink::WebThreadedDataReceiver* threaded_data_receiver_;
     62   bool resource_filter_active_;
     63   base::MessageLoop* main_thread_message_loop_;
     64 
     65   struct QueuedSharedMemoryData {
     66     const char* data;
     67     int length;
     68   };
     69   std::vector<QueuedSharedMemoryData> queued_data_;
     70 
     71   base::WeakPtrFactory<ThreadedDataProvider>
     72       main_thread_weak_factory_;
     73 
     74   DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
     75 };
     76 
     77 }  // namespace content
     78 
     79 #endif  // CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_
     80