74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/* <!-- 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
|