health/LowBatteryShutdownMetrics.h

/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef DEVICE_GOOGLE_CROSSHATCH_HEALTH_LOWBATTERYSHUTDOWNMETRICS_H
#define DEVICE_GOOGLE_CROSSHATCH_HEALTH_LOWBATTERYSHUTDOWNMETRICS_H

#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <batteryservice/BatteryService.h>
#include <math.h>
#include <time.h>
#include <utils/Timers.h>
#include <string>

#include <hardware/google/pixelstats/1.0/IPixelStats.h>

namespace device {
namespace google {
namespace crosshatch {
namespace health {

class LowBatteryShutdownMetrics {
  public:
    LowBatteryShutdownMetrics();
    void logShutdownVoltage(struct android::BatteryProperties *props);

  private:
    const char *kVoltageAvg = "/sys/class/power_supply/maxfg/voltage_avg";
    const char *kPersistProp = "persist.vendor.shutdown.voltage_avg";

    // Helps enforce that we only record kVoltageAvg once per boot cycle
    bool prop_written_;
    // Help us avoid polling kPersistProp if it's empty
    bool prop_empty_;

    bool saveVoltageAvg();
    void readStatus();
    bool uploadVoltageAvg();
};

}  // namespace health
}  // namespace crosshatch
}  // namespace google
}  // namespace device

#endif