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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2014 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_OPENED_FILE_COUNTER_H
#define D_OPENED_FILE_COUNTER_H
#include "common.h"
namespace aria2 {
class RequestGroupMan;
class OpenedFileCounter {
public:
OpenedFileCounter(RequestGroupMan* rgman, size_t maxOpenFiles);
// Keeps the number of open files under the global limit specified
// in the option. The caller requests that |numNewFiles| files are
// going to be opened. This function requires that |numNewFiles| is
// less than or equal to the limit.
//
// Currently the only download using MultiDiskAdaptor is affected by
// the global limit.
void ensureMaxOpenFileLimit(size_t numNewFiles);
// Reduces the number of open files managed by this object.
void reduceNumOfOpenedFile(size_t numCloseFiles);
void setMaxOpenFiles(size_t maxOpenFiles)
{
maxOpenFiles_ = maxOpenFiles;
}
// Deactivates this object.
void deactivate();
private:
RequestGroupMan* rgman_;
size_t maxOpenFiles_;
size_t numOpenFiles_;
};
} // namespace aria2
#endif // D_OPENED_FILE_COUNTER_H
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