dirty_tracked.hpp

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//
// Copyright 2010-2014 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

#ifndef INCLUDED_UHD_UTILS_DIRTY_TRACKED_HPP
#define INCLUDED_UHD_UTILS_DIRTY_TRACKED_HPP

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 dirty_tracked& source) {
            *this = source;
        }

        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

#endif /* INCLUDED_UHD_UTILS_DIRTY_TRACKED_HPP */