| #pragma once |
| |
| #include <gpiod.h> |
| |
| #include <boost/asio/io_service.hpp> |
| #include <boost/asio/posix/stream_descriptor.hpp> |
| |
| namespace phosphor |
| { |
| namespace gpio |
| { |
| |
| /** @class GpioMonitor |
| * @brief Responsible for catching GPIO state change |
| * condition and starting systemd targets. |
| */ |
| class GpioMonitor |
| { |
| public: |
| GpioMonitor() = delete; |
| ~GpioMonitor() = default; |
| GpioMonitor(const GpioMonitor&) = delete; |
| GpioMonitor& operator=(const GpioMonitor&) = delete; |
| GpioMonitor(GpioMonitor&&) = delete; |
| GpioMonitor& operator=(GpioMonitor&&) = delete; |
| |
| /** @brief Constructs GpioMonitor object. |
| * |
| * @param[in] line - GPIO line from libgpiod |
| * @param[in] config - configuration of line with event |
| * @param[in] io - io service |
| * @param[in] target - systemd unit to be started on GPIO |
| * value change |
| * @param[in] lineMsg - GPIO line message to be used for log |
| * @param[in] continueRun - Whether to continue after event occur |
| */ |
| GpioMonitor(gpiod_line* line, gpiod_line_request_config& config, |
| boost::asio::io_service& io, const std::string& target, |
| const std::string& lineMsg, bool continueRun) : |
| gpioLine(line), |
| gpioConfig(config), gpioEventDescriptor(io), target(target), |
| gpioLineMsg(lineMsg), continueAfterEvent(continueRun) |
| { |
| requestGPIOEvents(); |
| }; |
| |
| private: |
| /** @brief GPIO line */ |
| gpiod_line* gpioLine; |
| |
| /** @brief GPIO line configuration */ |
| gpiod_line_request_config gpioConfig; |
| |
| /** @brief GPIO event descriptor */ |
| boost::asio::posix::stream_descriptor gpioEventDescriptor; |
| |
| /** @brief Systemd unit to be started when the condition is met */ |
| const std::string target; |
| |
| /** @brief GPIO line name message */ |
| std::string gpioLineMsg; |
| |
| /** @brief If the monitor should continue after event */ |
| bool continueAfterEvent; |
| |
| /** @brief register handler for gpio event |
| * |
| * @return - 0 on success and -1 otherwise |
| */ |
| int requestGPIOEvents(); |
| |
| /** @brief Schedule an event handler for GPIO event to trigger */ |
| void scheduleEventHandler(); |
| |
| /** @brief Handle the GPIO event and starts configured target */ |
| void gpioEventHandler(); |
| }; |
| |
| } // namespace gpio |
| } // namespace phosphor |