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 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_