mirror of https://github.com/aria2/aria2
169 lines
4.3 KiB
C++
169 lines
4.3 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_MULTI_DISK_ADAPTOR_H_
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#define _D_MULTI_DISK_ADAPTOR_H_
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#include "DiskAdaptor.h"
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namespace aria2 {
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class MultiFileAllocationIterator;
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class FileEntry;
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class DiskWriter;
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class DiskWriterEntry {
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private:
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SharedHandle<FileEntry> fileEntry;
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SharedHandle<DiskWriter> diskWriter;
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public:
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DiskWriterEntry(const SharedHandle<FileEntry>& fileEntry);
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~DiskWriterEntry();
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std::string getFilePath(const std::string& topDir) const;
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void initAndOpenFile(const std::string& topDir);
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void openFile(const std::string& topDir);
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void openExistingFile(const std::string& topDir);
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void closeFile();
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bool fileExists(const std::string& topDir);
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int64_t size() const;
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SharedHandle<FileEntry> getFileEntry() const;
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void setDiskWriter(const SharedHandle<DiskWriter>& diskWriter);
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SharedHandle<DiskWriter> getDiskWriter() const;
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bool operator<(const DiskWriterEntry& entry) const;
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};
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typedef SharedHandle<DiskWriterEntry> DiskWriterEntryHandle;
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typedef std::deque<DiskWriterEntryHandle> DiskWriterEntries;
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class MultiDiskAdaptor : public DiskAdaptor {
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friend class MultiFileAllocationIterator;
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private:
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std::string topDir;
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int32_t pieceLength;
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DiskWriterEntries diskWriterEntries;
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bool _directIOAllowed;
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void resetDiskWriterEntries();
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void mkdir() const;
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bool isInRange(const DiskWriterEntryHandle entry, int64_t offset) const;
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int32_t calculateLength(const DiskWriterEntryHandle entry,
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int64_t fileOffset,
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int32_t rem) const;
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std::string getTopDirPath() const;
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public:
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MultiDiskAdaptor();
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virtual ~MultiDiskAdaptor();
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virtual void initAndOpenFile();
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virtual void openFile();
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virtual void openExistingFile();
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virtual void closeFile();
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virtual void onDownloadComplete();
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virtual void writeData(const unsigned char* data, int32_t len,
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int64_t offset);
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virtual int32_t readData(unsigned char* data, int32_t len, int64_t offset);
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virtual bool fileExists();
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virtual std::string getFilePath()
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{
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return getTopDirPath();
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}
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virtual int64_t size() const;
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virtual SharedHandle<FileAllocationIterator> fileAllocationIterator();
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virtual void enableDirectIO();
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virtual void disableDirectIO();
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void setTopDir(const std::string& topDir) {
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this->topDir = topDir;
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}
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const std::string& getTopDir() const {
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return topDir;
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}
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void setPieceLength(int32_t pieceLength) {
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this->pieceLength = pieceLength;
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}
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int32_t getPieceLength() const {
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return pieceLength;
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}
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virtual bool directIOAllowed() const
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{
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return _directIOAllowed;
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}
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void setDirectIOAllowed(bool b)
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{
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_directIOAllowed = b;
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}
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};
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typedef SharedHandle<MultiDiskAdaptor> MultiDiskAdaptorHandle;
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} // namespace aria2
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#endif // _D_MULTI_DISK_ADAPTOR_H_
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