dirty_tracked.hpp

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//
// Copyright 2010-2015 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: GPL-3.0-or-later
//

#pragma once

namespace uhd {
template <typename data_t>
class dirty_tracked
{
public:
    dirty_tracked()
        : _data()
        , // data_t must have a default ctor
        _dirty(true)
    {
    }

    dirty_tracked(const data_t& value)
        : _data(value)
        , // data_t must have a copy ctor
        _dirty(true)
    {
    }

    dirty_tracked(const uhd::dirty_tracked<data_t>&) = default;

    inline const data_t& get() const
    {
        return _data;
    }

    inline bool is_dirty() const
    {
        return _dirty;
    }

    inline void mark_clean()
    {
        _dirty = false;
    }

    inline void force_dirty()
    {
        _dirty = true;
    }

    inline dirty_tracked& operator=(const data_t& value)
    {
        if (!(_data == value)) { // data_t must have an equality operator
            _dirty = true;
            _data  = value; // data_t must have an assignment operator
        }
        return *this;
    }

    inline dirty_tracked& operator=(const dirty_tracked& source)
    {
        if (!(_data == source._data)) {
            _dirty = true;
            _data  = source._data;
        }
        return *this;
    }

    inline operator const data_t&() const
    {
        return get();
    }

private:
    data_t _data;
    bool _dirty;
};

} // namespace uhd