tlbmc/hal/gpio/gpio_monitor.h

#ifndef THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_GPIO_GPIO_MONITOR_H_
#define THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_GPIO_GPIO_MONITOR_H_

#include <memory>
#include <string>

#include "absl/status/statusor.h"
#include "boost/asio/io_context.hpp"  // NOLINT: boost is commonly used in BMC codebase
#include "boost/asio/posix/stream_descriptor.hpp"  // NOLINT: boost is commonly used in BMC codebase
#include "tlbmc/hal/gpio/gpio.h"

namespace milotic_tlbmc {

// A single instance of GpioMonitor is created for each GPIO line.
class GpioMonitor {
 public:
  static absl::StatusOr<std::unique_ptr<GpioMonitor>> Create(
      const GpioConfig& gpio_config,
      std::shared_ptr<boost::asio::io_context> io_context);

  virtual ~GpioMonitor();

  std::string GetGpioName() const { return gpio_->GetGpioName(); }
  absl::StatusOr<bool> GetGpioValue() const { return gpio_->GetValue(); }

 protected:
  void ScheduleEventHandler();
  virtual void EventHandler();

 private:
  GpioMonitor(
      std::unique_ptr<Gpio> gpio, bool is_one_time_request,
      std::unique_ptr<boost::asio::posix::stream_descriptor> event_descriptor);
  std::unique_ptr<Gpio> gpio_;
  bool is_one_time_request_;
  std::unique_ptr<boost::asio::posix::stream_descriptor> event_descriptor_;
};

}  // namespace milotic_tlbmc

#endif  // THIRD_PARTY_MILOTIC_EXTERNAL_CC_TLBMC_HAL_GPIO_GPIO_MONITOR_H_