chromium/components/metrics/clean_exit_beacon.h

// Copyright 2014 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_METRICS_CLEAN_EXIT_BEACON_H_
#define COMPONENTS_METRICS_CLEAN_EXIT_BEACON_H_

#include <optional>
#include <string>

#include "base/files/file_path.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "base/values.h"
#include "build/build_config.h"

class PrefRegistrySimple;
class PrefService;

namespace metrics {

// The name of the beacon file, which is relative to the user data directory
// and used to store the CleanExitBeacon value and the variations crash streak.
extern const base::FilePath::CharType kCleanExitBeaconFilename[];

// Captures all possible beacon value permutations for two distinct beacons.
// Exposed for testing.
//
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class CleanExitBeaconConsistency { … };

// Denotes the state of the beacon file. Exposed for testing.
//
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class BeaconFileState { … };

// Reads and updates a beacon used to detect whether the previous browser
// process exited cleanly.
class CleanExitBeacon { … };

}  // namespace metrics

#endif  // COMPONENTS_METRICS_CLEAN_EXIT_BEACON_H_