chromium/components/services/storage/dom_storage/async_dom_storage_database.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SERVICES_STORAGE_DOM_STORAGE_ASYNC_DOM_STORAGE_DATABASE_H_
#define COMPONENTS_SERVICES_STORAGE_DOM_STORAGE_ASYNC_DOM_STORAGE_DATABASE_H_

#include <memory>
#include <optional>
#include <set>
#include <tuple>
#include <vector>

#include "base/features.h"
#include "base/memory/scoped_refptr.h"
#include "base/task/sequenced_task_runner.h"
#include "base/threading/sequence_bound.h"
#include "base/unguessable_token.h"
#include "components/services/storage/dom_storage/dom_storage_database.h"
#include "components/services/storage/dom_storage/features.h"
#include "third_party/leveldatabase/src/include/leveldb/cache.h"
#include "third_party/leveldatabase/src/include/leveldb/db.h"

namespace storage {

namespace internal {
template <typename ResultType>
struct DatabaseTaskTraits;
}  // namespace internal

// A wrapper around DomStorageDatabase which simplifies usage by queueing
// database operations until the database is opened.
class AsyncDomStorageDatabase { … };

namespace internal {

template <typename ResultType>
struct DatabaseTaskTraits { … };

// This specialization allows database tasks to return tuples while their
// corresponding callback accepts the unpacked values of the tuple as separate
// arguments.
DatabaseTaskTraits<std::tuple<Args...>>;

}  // namespace internal

}  // namespace storage

#endif  // COMPONENTS_SERVICES_STORAGE_DOM_STORAGE_ASYNC_DOM_STORAGE_DATABASE_H_