File indexing completed on 2024-06-23 04:22:01

 /*
  *  SPDX-FileCopyrightText: 2010 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef __KIS_SWAPPED_DATA_STORE_H
 #define __KIS_SWAPPED_DATA_STORE_H
 
 #include "kritaimage_export.h"
 
 #include <QMutex>
 #include <QByteArray>
 
 
 class QMutex;
 class KisTileData;
 class KisAbstractTileCompressor;
 class KisChunkAllocator;
 class KisMemoryWindow;
 
 class KRITAIMAGE_EXPORT KisSwappedDataStore
 {
 public:
     KisSwappedDataStore();
     ~KisSwappedDataStore();
 
     /**
      * Returns number of swapped out tile data objects
      */
     quint64 numTiles() const;
 
     /**
      * Swap out the data stored in the \a td to the swap file
      * and free memory occupied by td->data().
      * LOCKING: the lock on the tile data should be taken
      *          by the caller before making a call.
      */
     bool trySwapOutTileData(KisTileData *td);
 
     /**
      * Restore the data of a \a td basing on information
      * stored in the swap file.
      * LOCKING: the lock on the tile data should be taken
      *          by the caller before making a call.
      */
     void swapInTileData(KisTileData *td);
 
     /**
      * Forget all the information linked with the tile data.
      * This should be done before deleting of the tile data,
      * whose actual data is swapped-out
      */
     void forgetTileData(KisTileData *td);
 
     /**
      * Returns the metric of the total memory stored in the swap
      * in *uncompressed* form!
      */
     qint64 totalSwapMemoryUsed() const;
 
     /**
      * Some debugging output
      */
     void debugStatistics();
 
 private:
     QByteArray m_buffer;
     KisAbstractTileCompressor *m_compressor;
 
     KisChunkAllocator *m_allocator;
     KisMemoryWindow *m_swapSpace;
 
     QMutex m_lock;
 
     qint64 m_totalSwapMemoryUsed;
 };
 
 #endif /* __KIS_SWAPPED_DATA_STORE_H */