1 // Copyright (c) 2013 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.
5 #ifndef WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_
6 #define WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_
10 #include "base/memory/ref_counted.h"
11 #include "base/memory/weak_ptr.h"
12 #include "base/supports_user_data.h"
13 #include "webkit/browser/webkit_storage_browser_export.h"
16 class SequencedTaskRunner;
19 namespace webkit_blob {
22 class BlobStorageContext;
24 // A scoper object for use in chrome's main browser process, ensures
25 // the underlying BlobData and its uuid remain in BlobStorageContext's
26 // collection for the duration. This object has delete semantics and
27 // maybe deleted on any thread.
28 class WEBKIT_STORAGE_BROWSER_EXPORT BlobDataHandle
29 : public base::SupportsUserData::Data {
31 virtual ~BlobDataHandle(); // Maybe be deleted on any thread.
32 BlobData* data() const; // May only be accessed on the IO thread.
35 friend class BlobStorageContext;
36 BlobDataHandle(BlobData* blob_data, BlobStorageContext* context,
37 base::SequencedTaskRunner* task_runner);
39 static void DeleteHelper(
40 base::WeakPtr<BlobStorageContext> context,
43 BlobData* blob_data_; // Intentionally a raw ptr to a non-thread-safe ref.
44 base::WeakPtr<BlobStorageContext> context_;
45 scoped_refptr<base::SequencedTaskRunner> io_task_runner_;
47 DISALLOW_COPY_AND_ASSIGN(BlobDataHandle);
50 } // namespace webkit_blob
52 #endif // WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_