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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 --> */
#include "MultiFileAllocationIterator.h"
#include "MultiDiskAdaptor.h"
#include "FileEntry.h"
#include "AdaptiveFileAllocationIterator.h"
#ifdef HAVE_SOME_FALLOCATE
# include "FallocFileAllocationIterator.h"
#endif // HAVE_SOME_FALLOCATE
#include "DiskWriter.h"
namespace aria2 {
MultiFileAllocationIterator::MultiFileAllocationIterator
(MultiDiskAdaptor* diskAdaptor):
diskAdaptor_(diskAdaptor),
entries_(diskAdaptor_->diskWriterEntries_.begin(),
diskAdaptor_->diskWriterEntries_.end()),
offset_(0)
{}
MultiFileAllocationIterator::~MultiFileAllocationIterator() {}
void MultiFileAllocationIterator::allocateChunk()
{
while(fileAllocationIterator_.isNull() ||
fileAllocationIterator_->finished()) {
if(entries_.empty()) {
break;
}
SharedHandle<DiskWriterEntry> entry = entries_.front();
entries_.pop_front();
SharedHandle<FileEntry> fileEntry = entry->getFileEntry();
// Open file before calling DiskWriterEntry::size()
diskAdaptor_->openIfNot(entry, &DiskWriterEntry::openFile);
if(entry->needsFileAllocation() && entry->size() < fileEntry->getLength()) {
// Calling private function of MultiDiskAdaptor.
#ifdef HAVE_SOME_FALLOCATE
if(diskAdaptor_->doesFallocate()) {
fileAllocationIterator_.reset
(new FallocFileAllocationIterator(entry->getDiskWriter().get(),
entry->size(),
fileEntry->getLength()));
} else
#endif // HAVE_SOME_FALLOCATE
{
fileAllocationIterator_.reset
(new AdaptiveFileAllocationIterator(entry->getDiskWriter().get(),
entry->size(),
fileEntry->getLength()));
}
}
}
if(finished()) {
return;
}
fileAllocationIterator_->allocateChunk();
}
bool MultiFileAllocationIterator::finished()
{
return entries_.empty() &&
(fileAllocationIterator_.isNull() || fileAllocationIterator_->finished());
}
off_t MultiFileAllocationIterator::getCurrentLength()
{
if(fileAllocationIterator_.isNull()) {
return 0;
} else {
return fileAllocationIterator_->getCurrentLength();
}
}
uint64_t MultiFileAllocationIterator::getTotalLength()
{
if(fileAllocationIterator_.isNull()) {
return 0;
} else {
return fileAllocationIterator_->getTotalLength();
}
}
const std::deque<SharedHandle<DiskWriterEntry> >&
MultiFileAllocationIterator::getDiskWriterEntries() const
{
return entries_;
}
} // namespace aria2
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