This commit fixes the bug that aria2.tellStopped RPC method returns
total length and completedLength as 0 when file size is unknown in
advance and turns out > 2GB in the end. This commit and addresses the
performance degradation in this case.
If we receive small data (e.g., 1 or 2 bytes), cache entry becomes a
headache. To mitigate this problem, we allocate cache buffer at least
4KiB and append the data to the contagious cache data.
This option enables disk cache. If SIZE is 0, the disk cache is
disabled. This feature caches the downloaded data in memory, which
grows to at most SIZE bytes. The cache storage is created for aria2
instance and shared by all downloads. The one advantage of the disk
cache is reduce the disk seek time because the data is written in
larger unit and it is reordered by the offset of the file. If the
underlying file is heavily fragmented it is not the case.
Calculate piece hash when data is arrived if the data is arrived
in
order. This removes additional read operation for hash
calculation.
If the data is arrived in out of order, the hash is calucated
when the
piece is completed. This is the same behavior as the old
implementation.
* src/BtPieceMessage.cc
* src/DefaultBtProgressInfoFile.cc
* src/DefaultPieceStorage.cc
* src/DownloadCommand.cc
* src/DownloadCommand.h
* src/DownloadEngine.cc
* src/GrowSegment.cc
* src/GrowSegment.h
* src/Piece.cc
* src/Piece.h
* src/PiecedSegment.cc
* src/PiecedSegment.h
* src/Segment.h
* test/PieceTest.cc
* src/Piece.{h, cc}: Added SubPiece infrastructure to track down
the data smaller than block length.
A block length can be specified by constructor's argument.
* src/DefaultPieceStorage.{h, cc} (getMissingPiece):
Get a missing piece in the range of given FileEntry. This
function is
not used in the program yet.
* src/Util.h: Added some macros.
Tatsuhiro Tsujikawa