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Diffstat (limited to 'host')
| -rw-r--r-- | host/include/uhd/utils/dirty_tracked.hpp | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/host/include/uhd/utils/dirty_tracked.hpp b/host/include/uhd/utils/dirty_tracked.hpp new file mode 100644 index 000000000..8be80fb1f --- /dev/null +++ b/host/include/uhd/utils/dirty_tracked.hpp @@ -0,0 +1,132 @@ +// +// 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{ + /*! + * A class that wraps a data value with a dirty flag + * When the client uses the assignment operator on this object, the object + * automatically dirties itself if the assigned type is not equal the underlying + * data. Data can be cleaned using the mark_clean entry-point. + * + * Requirements for data_t + * - Must have a default constructor + * - Must have a copy constructor + * - Must have an assignment operator (=) + * - Must have an equality operator (==) + */ + template<typename data_t> + class dirty_tracked { + public: + /*! + * Default ctor: Initialize to default value and dirty + */ + dirty_tracked() : + _data(), //data_t must have a default ctor + _dirty(true) + {} + + /*! + * Initialize to specified value and dirty + */ + dirty_tracked(const data_t& value) : + _data(value), //data_t must have a copy ctor + _dirty(true) + {} + + /*! + * Copy ctor: Assign source to this type + */ + dirty_tracked(const dirty_tracked& source) { + *this = source; + } + + /*! + * Get underlying data + */ + inline const data_t& get() const { + return _data; + } + + /*! + * Has the underlying data changed since the last + * time it was cleaned? + */ + inline bool is_dirty() const { + return _dirty; + } + + /*! + * Mark the underlying data as clean + */ + inline void mark_clean() { + _dirty = false; + } + + /*! + * Mark the underlying data as dirty + */ + inline void force_dirty() { + _dirty = true; + } + + /*! + * Assignment with data. + * Store the specified value and mark it as dirty + * if it is not equal to the underlying data. + */ + 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; + } + + /*! + * Assignment with dirty tracked type. + * Store the specified value from dirty type and mark it as dirty + * if it is not equal to the underlying data. + * This exists to optimize out an implicit cast from dirty_tracked + * type to data type. + */ + inline dirty_tracked& operator=(const dirty_tracked& source) { + if (!(_data == source._data)) { + _dirty = true; + _data = source._data; + } + return *this; + } + + /*! + * Explicit conversion from this type to data_t + */ + inline operator const data_t&() const { + return get(); + } + + private: + bool _dirty; + data_t _data; + }; + +} //namespace uhd + +#endif /* INCLUDED_UHD_UTILS_DIRTY_TRACKED_HPP */ |