Break large blobs into multiple ipcs during creation.

webkit/blob/blob_storage_controller.h

 // Copyright (c) 2011 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 WEBKIT_BLOB_BLOB_STORAGE_CONTROLLER_H_
 #define WEBKIT_BLOB_BLOB_STORAGE_CONTROLLER_H_
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/process.h"
+#include "webkit/blob/blob_data.h"
 
 class GURL;
 class FilePath;
 
 namespace base {
 class Time;
 }
 namespace net {
 class UploadData;
 }
 
 namespace webkit_blob {
 
-class BlobData;
-
 // This class handles the logistics of blob Storage within the browser process.
 class BlobStorageController {
  public:
   BlobStorageController();
   ~BlobStorageController();
 
-  void RegisterBlobUrl(const GURL& url, const BlobData* blob_data);
+  void RegisterUnfinalizedBlobUrl(const GURL& url);
+  void AppendBlobDataItem(const GURL& url, const BlobData::Item& data_item);
+  void FinalizeBlob(const GURL& url, const std::string& content_type);
   void RegisterBlobUrlFrom(const GURL& url, const GURL& src_url);
   void UnregisterBlobUrl(const GURL& url);
   BlobData* GetBlobDataFromUrl(const GURL& url);
 
   // If there is any blob reference in the upload data, it will get resolved
   // and updated in place.
   void ResolveBlobReferencesInUploadData(net::UploadData* upload_data);
 
  private:
   friend class ViewBlobInternalsJob;
 
   void AppendStorageItems(BlobData* target_blob_data,
                           BlobData* src_blob_data,
                           uint64 offset,
                           uint64 length);
   void AppendFileItem(BlobData* target_blob_data,
                       const FilePath& file_path, uint64 offset, uint64 length,
                       const base::Time& expected_modification_time);
 
+  void GetUnfinalizedBlobDataFromUrl(const GURL& url);
+
   typedef base::hash_map<std::string, scoped_refptr<BlobData> > BlobMap;
   BlobMap blob_map_;
+  BlobMap unfinalized_blob_map_;
+  int64 memory_usage_;

[jianli, 2011/09/23 23:00:42]

Please add comment for this variable.

[michaeln, 2011/09/24 01:15:24]

I thought memory_usage_ was mnemonic enough. What should the comment say?

[jianli, 2011/09/27 01:12:18]

Better to comment about what kind of stuffs are counted into the memory usage
since we only count the binary data.

[michaeln, 2011/09/27 23:27:31]

Done.

 
   DISALLOW_COPY_AND_ASSIGN(BlobStorageController);
 };
 
 }  // namespace webkit_blob
 
 #endif  // WEBKIT_BLOB_BLOB_STORAGE_CONTROLLER_H_