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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#ifndef D_MULTI_DISK_ADAPTOR_H
#define D_MULTI_DISK_ADAPTOR_H
#include "DiskAdaptor.h"
namespace aria2 {
class MultiFileAllocationIterator;
class FileEntry;
class DiskWriter;
class DiskWriterEntry {
private:
SharedHandle<FileEntry> fileEntry_;
SharedHandle<DiskWriter> diskWriter_;
bool open_;
bool needsFileAllocation_;
public:
DiskWriterEntry(const SharedHandle<FileEntry>& fileEntry);
const std::string& getFilePath() const;
void initAndOpenFile();
void openFile();
void openExistingFile();
void closeFile();
bool isOpen() const
{
return open_;
}
bool fileExists();
uint64_t size() const;
const SharedHandle<FileEntry>& getFileEntry() const
{
return fileEntry_;
}
void setDiskWriter(const SharedHandle<DiskWriter>& diskWriter);
const SharedHandle<DiskWriter>& getDiskWriter() const
{
return diskWriter_;
}
bool operator<(const DiskWriterEntry& entry) const;
bool needsFileAllocation() const
{
return needsFileAllocation_;
}
void needsFileAllocation(bool f)
{
needsFileAllocation_ = f;
}
};
typedef SharedHandle<DiskWriterEntry> DiskWriterEntryHandle;
typedef std::vector<DiskWriterEntryHandle> DiskWriterEntries;
class MultiDiskAdaptor : public DiskAdaptor {
friend class MultiFileAllocationIterator;
private:
size_t pieceLength_;
DiskWriterEntries diskWriterEntries_;
std::vector<SharedHandle<DiskWriterEntry> > openedDiskWriterEntries_;
size_t maxOpenFiles_;
bool readOnly_;
void resetDiskWriterEntries();
void openIfNot(const SharedHandle<DiskWriterEntry>& entry,
void (DiskWriterEntry::*f)());
static const size_t DEFAULT_MAX_OPEN_FILES = 100;
public:
MultiDiskAdaptor();
~MultiDiskAdaptor();
virtual void initAndOpenFile();
virtual void openFile();
virtual void openExistingFile();
virtual void closeFile();
virtual void writeData(const unsigned char* data, size_t len,
off_t offset);
virtual ssize_t readData(unsigned char* data, size_t len, off_t offset);
virtual bool fileExists();
virtual uint64_t size();
virtual SharedHandle<FileAllocationIterator> fileAllocationIterator();
virtual void enableReadOnly();
virtual void disableReadOnly();
virtual bool isReadOnlyEnabled() const { return readOnly_; }
void setPieceLength(size_t pieceLength)
{
pieceLength_ = pieceLength;
}
size_t getPieceLength() const {
return pieceLength_;
}
virtual void cutTrailingGarbage();
void setMaxOpenFiles(size_t maxOpenFiles);
virtual size_t utime(const Time& actime, const Time& modtime);
const std::vector<SharedHandle<DiskWriterEntry> >&
getDiskWriterEntries() const
{
return diskWriterEntries_;
}
};
typedef SharedHandle<MultiDiskAdaptor> MultiDiskAdaptorHandle;
} // namespace aria2
#endif // D_MULTI_DISK_ADAPTOR_H
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