tlbmc/sensors/shared_mem_based_sensor.h

#ifndef THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_SENSORS_SHARED_MEM_BASED_SENSOR_H_
#define THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_SENSORS_SHARED_MEM_BASED_SENSOR_H_

#include <array>
#include <atomic>
#include <cstddef>
#include <fstream>
#include <memory>
#include <optional>
#include <string>
#include <string_view>

#include "absl/functional/any_invocable.h"
#include "absl/status/statusor.h"
#include "boost/asio.hpp"  //NOLINT: boost::asio is commonly used in BMC
#include "i2c_common_config.pb.h"
#include "shared_mem_sensor_config.pb.h"
#include "sensor.pb.h"
#include "tlbmc/sensors/sensor.h"

namespace milotic_tlbmc {
class SharedMemBasedSensor
    : public Sensor,
      public std::enable_shared_from_this<SharedMemBasedSensor> {
 private:
  class Token;

 public:
  static absl::StatusOr<std::shared_ptr<Sensor>> Create(
      const SharedMemSensorConfig& config,
      const std::shared_ptr<boost::asio::io_context>& io_context,
      std::optional<NotificationCb> on_batch_notify = std::nullopt);

  SharedMemBasedSensor(
      Token token, SharedMemSensorType sensor_type, SensorUnit sensor_unit,
      const std::string& sensor_name,
      const EntityCommonConfig& entity_common_config,
      const ThresholdConfigs& threshold_configs,
      const std::shared_ptr<boost::asio::io_context>& io_context,
      std::optional<NotificationCb> on_batch_notify = std::nullopt);

  ~SharedMemBasedSensor() override = default;

  void RefreshOnceAsync(
      absl::AnyInvocable<void(const std::shared_ptr<const SensorValue>&)>
          callback) override;

 private:
  class Token {
   private:
    explicit Token() = default;
    friend SharedMemBasedSensor;
  };

  std::shared_ptr<boost::asio::io_context> io_context_;
  const SharedMemSensorType sensor_type_ = SHARED_MEM_SENSOR_TYPE_TYPE0_UNKNOWN;
  const std::string sensor_name_;
  const std::string board_config_name_;
};

}  // namespace milotic_tlbmc

#endif  // THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_SENSORS_SHARED_MEM_BASED_SENSOR_H_