chromium/components/breadcrumbs/core/breadcrumb_persistent_storage_manager.h

// Copyright 2020 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_BREADCRUMBS_CORE_BREADCRUMB_PERSISTENT_STORAGE_MANAGER_H_
#define COMPONENTS_BREADCRUMBS_CORE_BREADCRUMB_PERSISTENT_STORAGE_MANAGER_H_

#include <optional>
#include <string>
#include <vector>

#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/functional/callback_forward.h"
#include "base/task/sequenced_task_runner.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "components/breadcrumbs/core/breadcrumb_manager.h"
#include "components/breadcrumbs/core/breadcrumb_manager_observer.h"
#include "components/breadcrumbs/core/breadcrumbs_status.h"
#include "components/breadcrumbs/core/crash_reporter_breadcrumb_constants.h"

namespace breadcrumbs {

// The filesize for the file at |breadcrumbs_file_path_|. The file will always
// be this constant size because it is accessed using a memory mapped file. The
// file is twice as large as |kMaxDataLength| which leaves room for appending
// breadcrumb events. Once the file is full of events, the contents will be
// reduced to kMaxDataLength.
constexpr size_t kPersistedFilesizeInBytes = …;

// Stores breadcrumb events to and retrieves them from a file on disk.
// Persisting these events allows access to breadcrumb events from previous
// application sessions.
class BreadcrumbPersistentStorageManager : public BreadcrumbManagerObserver { … };

}  // namespace breadcrumbs

#endif  // COMPONENTS_BREADCRUMBS_CORE_BREADCRUMB_PERSISTENT_STORAGE_MANAGER_H_