diff -r 000000000000 -r 6474c204b198 dom/file/FileStreamWrappers.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/file/FileStreamWrappers.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_file_filestreamwrappers_h__
+#define mozilla_dom_file_filestreamwrappers_h__
+
+#include "FileCommon.h"
+
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+
+BEGIN_FILE_NAMESPACE
+
+class FileHelper;
+
+class FileStreamWrapper : public nsISupports
+{
+public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  FileStreamWrapper(nsISupports* aFileStream,
+                    FileHelper* aFileHelper,
+                    uint64_t aOffset,
+                    uint64_t aLimit,
+                    uint32_t aFlags);
+
+  virtual ~FileStreamWrapper();
+
+  enum {
+    NOTIFY_PROGRESS = 1 << 0,
+    NOTIFY_CLOSE = 1 << 1,
+    NOTIFY_DESTROY = 1 << 2
+  };
+
+protected:
+  nsCOMPtr<nsISupports> mFileStream;
+  nsRefPtr<FileHelper> mFileHelper;
+  uint64_t mOffset;
+  uint64_t mLimit;
+  uint32_t mFlags;
+  bool mFirstTime;
+};
+
+class FileInputStreamWrapper : public FileStreamWrapper,
+                               public nsIInputStream
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIINPUTSTREAM
+
+  FileInputStreamWrapper(nsISupports* aFileStream,
+                         FileHelper* aFileHelper,
+                         uint64_t aOffset,
+                         uint64_t aLimit,
+                         uint32_t aFlags);
+
+protected:
+  virtual ~FileInputStreamWrapper()
+  { }
+
+private:
+  nsCOMPtr<nsIInputStream> mInputStream;
+};
+
+class FileOutputStreamWrapper : public FileStreamWrapper,
+                                public nsIOutputStream
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIOUTPUTSTREAM
+
+  FileOutputStreamWrapper(nsISupports* aFileStream,
+                         FileHelper* aFileHelper,
+                         uint64_t aOffset,
+                         uint64_t aLimit,
+                         uint32_t aFlags);
+
+protected:
+  virtual ~FileOutputStreamWrapper()
+  { }
+
+private:
+  nsCOMPtr<nsIOutputStream> mOutputStream;
+#ifdef DEBUG
+  void* mWriteThread;
+#endif
+};
+
+END_FILE_NAMESPACE
+
+#endif // mozilla_dom_file_filestreamwrappers_h__