Program Listing for File digital_input.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
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef PHIDGETS_API_DIGITAL_INPUT_HPP
#define PHIDGETS_API_DIGITAL_INPUT_HPP

#include <functional>

#include <libphidget22/phidget22.h>

#include "phidgets_api/phidget22.hpp"

namespace phidgets {

class DigitalInput
{
  public:
    PHIDGET22_NO_COPY_NO_MOVE_NO_ASSIGN(DigitalInput)

    explicit DigitalInput(int32_t serial_number, int hub_port,
                          bool is_hub_port_device, int channel,
                          std::function<void(int, int)> input_handler);

    ~DigitalInput();

    int32_t getSerialNumber() const noexcept;

    bool getInputValue() const;

    void stateChangeHandler(int state) const;

  private:
    int32_t serial_number_;
    int channel_;
    std::function<void(int, int)> input_handler_;
    PhidgetDigitalInputHandle di_handle_{nullptr};

    static void StateChangeHandler(PhidgetDigitalInputHandle input_handle,
                                   void *ctx, int state);
};

}  // namespace phidgets

#endif  // PHIDGETS_API_DIGITAL_INPUT_HPP