AbstractSingleDiskAdaptor.h 3.2 KB

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  1. /* <!-- copyright */
  2. /*
  3. * aria2 - The high speed download utility
  4. *
  5. * Copyright (C) 2006 Tatsuhiro Tsujikawa
  6. *
  7. * This program is free software; you can redistribute it and/or modify
  8. * it under the terms of the GNU General Public License as published by
  9. * the Free Software Foundation; either version 2 of the License, or
  10. * (at your option) any later version.
  11. *
  12. * This program is distributed in the hope that it will be useful,
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15. * GNU General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU General Public License
  18. * along with this program; if not, write to the Free Software
  19. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20. *
  21. * In addition, as a special exception, the copyright holders give
  22. * permission to link the code of portions of this program with the
  23. * OpenSSL library under certain conditions as described in each
  24. * individual source file, and distribute linked combinations
  25. * including the two.
  26. * You must obey the GNU General Public License in all respects
  27. * for all of the code used other than OpenSSL. If you modify
  28. * file(s) with this exception, you may extend this exception to your
  29. * version of the file(s), but you are not obligated to do so. If you
  30. * do not wish to do so, delete this exception statement from your
  31. * version. If you delete this exception statement from all source
  32. * files in the program, then also delete it here.
  33. */
  34. /* copyright --> */
  35. #ifndef _D_ABSTRACT_SINGLE_DISK_ADAPTOR_H_
  36. #define _D_ABSTRACT_SINGLE_DISK_ADAPTOR_H_
  37. #include "DiskAdaptor.h"
  38. namespace aria2 {
  39. class DiskWriter;
  40. class FileAllocationIterator;
  41. class AbstractSingleDiskAdaptor : public DiskAdaptor {
  42. private:
  43. SharedHandle<DiskWriter> _diskWriter;
  44. uint64_t _totalLength;
  45. bool _readOnly;
  46. public:
  47. AbstractSingleDiskAdaptor();
  48. virtual ~AbstractSingleDiskAdaptor();
  49. virtual void initAndOpenFile();
  50. virtual void openFile();
  51. virtual void closeFile();
  52. virtual void openExistingFile();
  53. virtual void writeData(const unsigned char* data, size_t len,
  54. off_t offset);
  55. virtual ssize_t readData(unsigned char* data, size_t len, off_t offset);
  56. virtual bool fileExists();
  57. virtual uint64_t size();
  58. virtual void truncate(uint64_t length);
  59. virtual SharedHandle<FileAllocationIterator> fileAllocationIterator();
  60. virtual void enableDirectIO();
  61. virtual void disableDirectIO();
  62. // Make sure that DiskWriter is set before calling this function.
  63. virtual void enableReadOnly();
  64. // Make sure that DiskWriter is set before calling this function.
  65. virtual void disableReadOnly();
  66. virtual bool isReadOnlyEnabled() const { return _readOnly; }
  67. virtual void cutTrailingGarbage();
  68. virtual const std::string& getFilePath() = 0;
  69. void setDiskWriter(const SharedHandle<DiskWriter>& diskWriter);
  70. const SharedHandle<DiskWriter>& getDiskWriter() const
  71. {
  72. return _diskWriter;
  73. }
  74. void setTotalLength(const uint64_t& totalLength);
  75. uint64_t getTotalLength() const
  76. {
  77. return _totalLength;
  78. }
  79. };
  80. } // namespace aria2
  81. #endif // _D_ABSTRACT_SINGLE_DISK_ADAPTOR_H_