Redirect HTML resource bytes directly to parser thread (Chrome side CL)

content/child/threaded_data_provider.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_
+#define CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_
+
+#include "base/compiler_specific.h"
+#include "base/memory/linked_ptr.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/shared_memory.h"
+#include "base/memory/weak_ptr.h"
+#include "ipc/ipc_channel.h"
+#include "ipc/message_filter.h"
+
+namespace blink {
+class WebThreadedDataReceiver;
+}
+
+namespace IPC {
+class SyncChannel;
+}
+
+namespace webkit_glue {
+class WebThreadImpl;
+}
+
+namespace content {
+class ResourceDispatcher;
+class WebThreadImpl;
+
+class ThreadedDataProvider {
+ public:
+  ThreadedDataProvider(
+      int request_id,
+      blink::WebThreadedDataReceiver* threaded_data_receiver,
+      linked_ptr<base::SharedMemory> shm_buffer,
+      int shm_size);
+  virtual ~ThreadedDataProvider();
+
+  void Stop();
+  void OnReceivedDataOnBackgroundThread(int data_offset,
+                                        int data_length,
+                                        int encoded_data_length);
+
+  void OnReceivedDataOnForegroundThread(const char* data,
+                                        int data_length,
+                                        int encoded_data_length);
+
+  void OnResourceMessageFilterAddedMainThread();
+
+ private:
+  void StopOnBackgroundThread();
+  void OnResourceMessageFilterAddedBackgroundThread();
+  void ForwardAndACKData(const char* data, int data_length);
+
+  scoped_refptr<IPC::MessageFilter> filter_;
+  int request_id_;
+  linked_ptr<base::SharedMemory> shm_buffer_;
+  int shm_size_;
+  scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
+      background_thread_weak_factory_;
+  base::WeakPtrFactory<ThreadedDataProvider>
+      main_thread_weak_factory_;
+  WebThreadImpl& background_thread_;
+  IPC::SyncChannel* ipc_channel_;
+  blink::WebThreadedDataReceiver* threaded_data_receiver_;
+  bool resource_filter_active_;
+  base::MessageLoop* main_thread_message_loop_;
+
+  struct QueuedSharedMemoryData {
+    const char* data;
+    int length;
+  };
+  std::vector<QueuedSharedMemoryData> queued_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(ThreadedDataProvider);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_CHILD_THREADEDDATAPROVIDER_IMPL_H_