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rakshasa
4d313e6353
git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@1301 e378c898-3ddf-0310-93e7-cc216c733640
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
// rTorrent - BitTorrent client
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// Copyright (C) 2005-2011, Jari Sundell
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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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//
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// You must obey the GNU General Public License in all respects for
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// all of the code used other than OpenSSL. If you modify file(s)
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// with this exception, you may extend this exception to your version
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// of the file(s), but you are not obligated to do so. If you do not
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// wish to do so, delete this exception statement from your version.
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// If you delete this exception statement from all source files in the
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// program, then also delete it here.
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//
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// Contact: Jari Sundell <jaris@ifi.uio.no>
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//
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// Skomakerveien 33
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// 3185 Skoppum, NORWAY
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// A simple, and not guaranteed atomic, lockfile implementation. It
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// saves the hostname and pid in the lock file, which may be accessed
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// by Lockfile::locked_by(). If the path is an empty string then no
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// lockfile will be created when Lockfile::try_lock() is called, still
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// it will set the locked state of the Lockfile instance.
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#ifndef RTORRENT_UTILS_LOCKFILE_H
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#define RTORRENT_UTILS_LOCKFILE_H
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#include <string>
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#include <sys/types.h>
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namespace utils {
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class Lockfile {
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public:
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typedef std::pair<std::string, pid_t> process_type;
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Lockfile() : m_locked(false) {}
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bool is_locked() const { return m_locked; }
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bool is_stale();
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// If the path is empty no lock file will be created, although
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// is_locked() will return true.
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bool try_lock();
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bool unlock();
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const std::string& path() const { return m_path; }
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void set_path(const std::string& path) { m_path = path; }
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std::string locked_by_as_string() const;
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process_type locked_by() const;
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private:
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std::string m_path;
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bool m_locked;
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};
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}
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#endif
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