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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef STORAGE_BROWSER_FILE_SYSTEM_FILE_SYSTEM_QUOTA_CLIENT_H_
#define STORAGE_BROWSER_FILE_SYSTEM_FILE_SYSTEM_QUOTA_CLIENT_H_
#include "base/component_export.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/sequence_checker.h"
#include "base/thread_annotations.h"
#include "components/services/storage/public/mojom/quota_client.mojom.h"
#include "storage/browser/file_system/file_system_quota_util.h"
#include "storage/browser/quota/quota_client_type.h"
#include "storage/common/file_system/file_system_types.h"
namespace base {
class SequencedTaskRunner;
}
namespace storage {
class FileSystemContext;
struct BucketLocator;
// All of the public methods of this class are called by the quota manager
// (except for the constructor/destructor).
class COMPONENT_EXPORT(STORAGE_BROWSER) FileSystemQuotaClient
: public mojom::QuotaClient {
public:
explicit FileSystemQuotaClient(FileSystemContext* file_system_context);
~FileSystemQuotaClient() override;
FileSystemQuotaClient(const FileSystemQuotaClient&) = delete;
FileSystemQuotaClient& operator=(const FileSystemQuotaClient&) = delete;
// mojom::QuotaClient methods.
void GetBucketUsage(const BucketLocator& bucket,
GetBucketUsageCallback callback) override;
void GetDefaultStorageKeys(GetDefaultStorageKeysCallback callback) override;
void DeleteBucketData(const BucketLocator& bucket,
DeleteBucketDataCallback callback) override;
void PerformStorageCleanup(PerformStorageCleanupCallback callback) override;
private:
base::SequencedTaskRunner* file_task_runner() const;
// Gets available FileSystemTypes for a FileSystemContext.
std::vector<FileSystemType> GetFileSystemTypes() const;
SEQUENCE_CHECKER(sequence_checker_);
// Raw pointer usage is safe because `file_system_context_` owns this.
//
// The FileSystemQuotaClient implementation mints scoped_refptrs from this
// raw pointer in order to ensure that the FileSystemContext remains alive
// while tasks are posted to the FileSystemContext's file sequence.
//
// So, it would be tempting to use scoped_refptr<FileSystemContext> here.
// However, using scoped_refptr here creates a cycle, because
// `file_system_context_` owns this. We could break the cycle in
// FileSystemContext::Shutdown(), but then we would have to ensure that
// Shutdown() is called by all FileSystemContext users.
const raw_ptr<FileSystemContext> file_system_context_
GUARDED_BY_CONTEXT(sequence_checker_);
};
} // namespace storage
#endif // STORAGE_BROWSER_FILE_SYSTEM_FILE_SYSTEM_QUOTA_CLIENT_H_
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