DigitalPinAccessBase.hpp

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/*
 * This file is part of the DUDS project. It is subject to the BSD-style
 * license terms in the LICENSE file found in the top-level directory of this
 * distribution and at https://github.com/jjackowski/duds/blob/master/LICENSE.
 * No part of DUDS, including this file, may be copied, modified, propagated,
 * or distributed except according to the terms contained in the LICENSE file.
 *
 * Copyright (C) 2017  Jeff Jackowski
 */
#ifndef DIGITALPINACCESSBASE_HPP
#define DIGITALPINACCESSBASE_HPP

#include <boost/noncopyable.hpp>
#include <cstdint>

namespace duds { namespace hardware { namespace interface {

class DigitalPort;

class DigitalPinAccessBase : boost::noncopyable {
public:
    union PortData {
        void *pointer;
        std::intptr_t integer;
        std::int16_t int16[2];
        PortData() : pointer(nullptr) { }
    };
private:
    DigitalPort *dp;
    friend DigitalPort;
protected:
    mutable PortData portdata;
    DigitalPinAccessBase() : dp(nullptr) { };
    DigitalPinAccessBase(DigitalPort *port) : dp(port) { }
    ~DigitalPinAccessBase() = default;
    DigitalPinAccessBase &operator=(DigitalPinAccessBase &&old) noexcept;
    void reset() {
        dp = nullptr;
    }
public:
    DigitalPort *port() const {
        return dp;
    }
};

} } }

#endif        //  #ifndef DIGITALPINACCESSBASE_HPP