mirror of https://github.com/aria2/aria2
115 lines
3.6 KiB
C++
115 lines
3.6 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) 2010 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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#include "AdaptiveFileAllocationIterator.h"
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#include "BinaryStream.h"
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#include "SingleFileAllocationIterator.h"
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#include "RecoverableException.h"
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#include "LogFactory.h"
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#include "Logger.h"
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#include "a2functional.h"
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#ifdef HAVE_FALLOCATE
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# include "FallocFileAllocationIterator.h"
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#endif // HAVE_FALLOCATE
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namespace aria2 {
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AdaptiveFileAllocationIterator::AdaptiveFileAllocationIterator
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(BinaryStream* stream, int64_t offset, int64_t totalLength)
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: stream_(stream),
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offset_(offset),
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totalLength_(totalLength)
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{}
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AdaptiveFileAllocationIterator::~AdaptiveFileAllocationIterator() {}
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void AdaptiveFileAllocationIterator::allocateChunk()
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{
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if(!allocator_) {
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#ifdef HAVE_FALLOCATE
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try {
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A2_LOG_DEBUG("Testing file system supports fallocate.");
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if(offset_ < totalLength_) {
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int64_t len = std::min(totalLength_-offset_,
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static_cast<int64_t>(4096));
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stream_->allocate(offset_, len, false);
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offset_ += len;
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}
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A2_LOG_DEBUG("File system supports fallocate.");
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allocator_ = make_unique<FallocFileAllocationIterator>
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(stream_, offset_, totalLength_);
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} catch(RecoverableException& e) {
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A2_LOG_DEBUG("File system does not support fallocate.");
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auto salloc = make_unique<SingleFileAllocationIterator>
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(stream_, offset_, totalLength_);
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salloc->init();
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allocator_ = std::move(salloc);
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}
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#else // !HAVE_FALLOCATE
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auto salloc = make_unique<SingleFileAllocationIterator>
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(stream_, offset_, totalLength_);
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salloc->init();
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allocator_ = std::move(salloc);
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#endif // !HAVE_FALLOCATE
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allocator_->allocateChunk();
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} else {
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allocator_->allocateChunk();
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}
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}
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bool AdaptiveFileAllocationIterator::finished()
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{
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if(!allocator_) {
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return offset_ == totalLength_;
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} else {
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return allocator_->finished();
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}
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}
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int64_t AdaptiveFileAllocationIterator::getCurrentLength()
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{
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if(!allocator_) {
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return offset_;
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} else {
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return allocator_->getCurrentLength();
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}
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}
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int64_t AdaptiveFileAllocationIterator::getTotalLength()
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{
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return totalLength_;
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}
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} // namespace aria2
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