Program Listing for File digital_inputs_ros_i.hpp

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/*
 * Copyright (c) 2019, Open Source Robotics Foundation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the copyright holder nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef PHIDGETS_DIGITAL_INPUTS_DIGITAL_INPUTS_ROS_I_HPP
#define PHIDGETS_DIGITAL_INPUTS_DIGITAL_INPUTS_ROS_I_HPP

#include <memory>
#include <mutex>
#include <vector>

#include <rclcpp/rclcpp.hpp>
#include <std_msgs/msg/bool.hpp>

#include "phidgets_api/digital_inputs.hpp"

namespace phidgets {

struct ValToPub {
    rclcpp::Publisher<std_msgs::msg::Bool>::SharedPtr pub;
    bool last_val;
};

class DigitalInputsRosI final : public rclcpp::Node
{
  public:
    explicit DigitalInputsRosI(const rclcpp::NodeOptions& options);

  private:
    std::unique_ptr<DigitalInputs> dis_;
    std::mutex di_mutex_;
    std::vector<ValToPub> val_to_pubs_;

    void timerCallback();
    rclcpp::TimerBase::SharedPtr timer_;
    double publish_rate_;

    void publishLatest(int index);

    void stateChangeCallback(int index, int input_value);
};

}  // namespace phidgets

#endif  // PHIDGETS_DIGITAL_INPUTS_DIGITAL_INPUTS_ROS_I_HPP