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// Copyright (c) 2013 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_BROWSER_BLOB_BLOB_DATA_HANDLE_H_
#define WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/supports_user_data.h"
#include "webkit/browser/webkit_storage_browser_export.h"
namespace base {
class SequencedTaskRunner;
}
namespace webkit_blob {
class BlobData;
class BlobStorageContext;
// A scoper object for use in chrome's main browser process, ensures
// the underlying BlobData and its uuid remain in BlobStorageContext's
// collection for the duration. This object has delete semantics and
// maybe deleted on any thread.
class WEBKIT_STORAGE_BROWSER_EXPORT BlobDataHandle
: public base::SupportsUserData::Data {
public:
virtual ~BlobDataHandle(); // Maybe be deleted on any thread.
BlobData* data() const; // May only be accessed on the IO thread.
private:
friend class BlobStorageContext;
BlobDataHandle(BlobData* blob_data, BlobStorageContext* context,
base::SequencedTaskRunner* task_runner);
static void DeleteHelper(
base::WeakPtr<BlobStorageContext> context,
BlobData* blob_data);
BlobData* blob_data_; // Intentionally a raw ptr to a non-thread-safe ref.
base::WeakPtr<BlobStorageContext> context_;
scoped_refptr<base::SequencedTaskRunner> io_task_runner_;
DISALLOW_COPY_AND_ASSIGN(BlobDataHandle);
};
} // namespace webkit_blob
#endif // WEBKIT_BROWSER_BLOB_BLOB_DATA_HANDLE_H_
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