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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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. *
***************************************************************************/
#include <klocale.h>
#include <tqfileinfo.h>
#include <tqstringlist.h>
#include <util/fileops.h>
#include <util/error.h>
#include <util/functions.h>
#include <util/log.h>
#include "torrent.h"
#include "chunk.h"
#include "globals.h"
#include "cachefile.h"
#include "singlefilecache.h"
#include "preallocationthread.h"
namespace bt
{
SingleFileCache::SingleFileCache(Torrent& tor,const TQString & tmpdir,const TQString & datadir)
: Cache(tor,tmpdir,datadir),fd(0)
{
cache_file = tmpdir + "cache";
output_file = TQFileInfo(cache_file).readLink();
}
SingleFileCache::~SingleFileCache()
{}
void SingleFileCache::changeTmpDir(const TQString & ndir)
{
Cache::changeTmpDir(ndir);
cache_file = tmpdir + "cache";
}
KIO::Job* SingleFileCache::moveDataFiles(const TQString & ndir)
{
return KIO::move(KURL::fromPathOrURL(output_file),KURL::fromPathOrURL(ndir));
}
void SingleFileCache::moveDataFilesCompleted(KIO::Job* /*job*/)
{
}
void bt::SingleFileCache::changeOutputPath(const TQString & outputpath)
{
bt::Delete(cache_file);
output_file = outputpath;
datadir = output_file.left(output_file.tqfindRev(bt::DirSeparator()));
bt::SymLink(output_file, cache_file);
}
bool SingleFileCache::prep(Chunk* c)
{
if (mmap_failures >= 3)
{
// mmap continuously fails, so stop using it
c->allocate();
c->settqStatus(Chunk::BUFFERED);
}
else
{
Uint64 off = c->getIndex() * tor.getChunkSize();
Uint8* buf = (Uint8*)fd->map(c,off,c->getSize(),CacheFile::RW);
if (!buf)
{
mmap_failures++;
// buffer it if mmapping fails
Out(SYS_GEN|LOG_IMPORTANT) << "Warning : mmap failure, falling back to buffered mode" << endl;
c->allocate();
c->settqStatus(Chunk::BUFFERED);
}
else
{
c->setData(buf,Chunk::MMAPPED);
}
}
return true;
}
void SingleFileCache::load(Chunk* c)
{
Uint64 off = c->getIndex() * tor.getChunkSize();
Uint8* buf = 0;
if (mmap_failures >= 3 || !(buf = (Uint8*)fd->map(c,off,c->getSize(),CacheFile::READ)))
{
c->allocate();
c->settqStatus(Chunk::BUFFERED);
fd->read(c->getData(),c->getSize(),off);
if (mmap_failures < 3)
mmap_failures++;
}
else
{
c->setData(buf,Chunk::MMAPPED);
}
}
void SingleFileCache::save(Chunk* c)
{
// unmap the chunk if it is mapped
if (c->gettqStatus() == Chunk::MMAPPED)
{
fd->unmap(c->getData(),c->getSize());
c->clear();
c->settqStatus(Chunk::ON_DISK);
}
else if (c->gettqStatus() == Chunk::BUFFERED)
{
Uint64 off = c->getIndex() * tor.getChunkSize();
fd->write(c->getData(),c->getSize(),off);
c->clear();
c->settqStatus(Chunk::ON_DISK);
}
}
void SingleFileCache::create()
{
TQFileInfo fi(cache_file);
if (!fi.exists())
{
TQString out_file = fi.readLink();
if (out_file.isNull())
out_file = datadir + tor.getNameSuggestion();
if (!bt::Exists(out_file))
bt::Touch(out_file);
else
preexisting_files = true;
if (bt::Exists(cache_file))
bt::Delete(cache_file);
bt::SymLink(out_file,cache_file);
output_file = out_file;
}
else
{
TQString out_file = fi.readLink();
if (!bt::Exists(out_file))
bt::Touch(out_file);
else
preexisting_files = true;
}
}
void SingleFileCache::close()
{
if (fd)
{
fd->close();
delete fd;
fd = 0;
}
}
void SingleFileCache::open()
{
if (fd)
return;
try
{
fd = new CacheFile();
fd->open(cache_file,tor.getFileLength());
}
catch (...)
{
fd->close();
delete fd;
fd = 0;
throw;
}
}
void SingleFileCache::preallocateDiskSpace(PreallocationThread* prealloc)
{
if (!fd)
open();
if (!prealloc->isStopped())
fd->preallocate(prealloc);
else
prealloc->setNotFinished();
}
bool SingleFileCache::hasMissingFiles(TQStringList & sl)
{
TQFileInfo fi(cache_file);
if (!fi.exists())
{
TQString out_file = fi.readLink();
sl.append(fi.readLink());
return true;
}
return false;
}
void SingleFileCache::deleteDataFiles()
{
bt::Delete(output_file);
}
Uint64 SingleFileCache::diskUsage()
{
if (!fd)
open();
return fd->diskUsage();
}
}
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