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// Copyright (c) 2012 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_BROWSER_FILEAPI_CHROME_BLOB_STORAGE_CONTEXT_H_
#define CONTENT_BROWSER_FILEAPI_CHROME_BLOB_STORAGE_CONTEXT_H_
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/sequenced_task_runner_helpers.h"
#include "content/common/content_export.h"
namespace webkit_blob {
class BlobStorageContext;
}
namespace content {
class BlobHandle;
class BrowserContext;
struct ChromeBlobStorageContextDeleter;
// A context class that keeps track of BlobStorageController used by the chrome.
// There is an instance associated with each BrowserContext. There could be
// multiple URLRequestContexts in the same browser context that refers to the
// same instance.
//
// All methods, except the ctor, are expected to be called on
// the IO thread (unless specifically called out in doc comments).
class CONTENT_EXPORT ChromeBlobStorageContext
: public base::RefCountedThreadSafe<ChromeBlobStorageContext,
ChromeBlobStorageContextDeleter> {
public:
ChromeBlobStorageContext();
static ChromeBlobStorageContext* GetFor(
BrowserContext* browser_context);
void InitializeOnIOThread();
webkit_blob::BlobStorageContext* context() const {
return context_.get();
}
// Returns a NULL scoped_ptr on failure.
scoped_ptr<BlobHandle> CreateMemoryBackedBlob(const char* data,
size_t length);
protected:
virtual ~ChromeBlobStorageContext();
private:
friend class base::DeleteHelper<ChromeBlobStorageContext>;
friend class base::RefCountedThreadSafe<ChromeBlobStorageContext,
ChromeBlobStorageContextDeleter>;
friend struct ChromeBlobStorageContextDeleter;
void DeleteOnCorrectThread() const;
scoped_ptr<webkit_blob::BlobStorageContext> context_;
};
struct ChromeBlobStorageContextDeleter {
static void Destruct(const ChromeBlobStorageContext* context) {
context->DeleteOnCorrectThread();
}
};
} // namespace content
#endif // CONTENT_BROWSER_FILEAPI_CHROME_BLOB_STORAGE_CONTEXT_H_
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