tlbmc/sensors/hwmon_input_device.h

#ifndef THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_SENSORS_HWMON_INPUT_DEVICE_H_
#define THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_SENSORS_HWMON_INPUT_DEVICE_H_

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

#include "absl/functional/any_invocable.h"
#include "boost/asio.hpp"  // NOLINT: boost::asio is commonly used in BMC
#include "boost/asio/error.hpp"  // NOLINT
#include "boost/asio/random_access_file.hpp"  // NOLINT: boost::asio is commonly used in BMC
#include "boost/filesystem.hpp"  // NOLINT: boost::filesystem is commonly used in BMC
#include "boost/filesystem/operations.hpp"  // NOLINT
#include "boost/system/detail/error_code.hpp"  // NOLINT: boost::asio is commonly used in BMC

namespace milotic_tlbmc {

// This class abstracts the input device reading for Hwmon. We want to use
// iouring if possible but default to ifstream otherwise.
class HwmonInputDevice {
 public:
  HwmonInputDevice(const std::shared_ptr<boost::asio::io_context>& io_context,
                   std::string_view input_dev_path);

  virtual void ReadAndProcess(
      absl::AnyInvocable<void(const boost::system::error_code&, size_t)>
          callback,
      std::array<char, 128>& read_buffer);

  virtual ~HwmonInputDevice();

 protected:
  std::shared_ptr<boost::asio::io_context> io_context_;
  std::string input_dev_path_;
  std::shared_ptr<boost::asio::random_access_file> io_uring_input_device_;
  std::ifstream ifstream_input_device_;
};

}  // namespace milotic_tlbmc

#endif  // THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_SENSORS_HWMON_INPUT_DEVICE_H_