mirror of
https://github.com/qTox/qTox.git
synced 2024-03-22 14:00:36 +08:00
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
/*
|
|
Copyright © 2015 by The qTox Project
|
|
|
|
This file is part of qTox, a Qt-based graphical interface for Tox.
|
|
|
|
qTox is libre 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
qTox 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 qTox. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
|
|
#ifndef PROFILELOCKER_H
|
|
#define PROFILELOCKER_H
|
|
|
|
#include <QLockFile>
|
|
#include <memory>
|
|
|
|
/// Locks a Tox profile so that multiple instances can not use the same profile.
|
|
/// Only one lock can be acquired at the same time, which means
|
|
/// that there is little need for manually unlocking.
|
|
/// The current lock will expire if you exit or acquire a new one.
|
|
class ProfileLocker
|
|
{
|
|
private:
|
|
ProfileLocker()=delete;
|
|
|
|
public:
|
|
/// Checks if a profile is currently locked by *another* instance
|
|
/// If we own the lock, we consider it lockable
|
|
/// There is no guarantee that the result will still be valid by the
|
|
/// time it is returned, this is provided on a best effort basis
|
|
static bool isLockable(QString profile);
|
|
/// Tries to acquire the lock on a profile, will not block
|
|
/// Returns true if we already own the lock
|
|
static bool lock(QString profile);
|
|
/// Releases the lock on the current profile
|
|
static void unlock();
|
|
/// Returns true if we're currently holding a lock
|
|
static bool hasLock();
|
|
/// Return the name of the currently loaded profile, a null string if there is none
|
|
static QString getCurLockName();
|
|
/// Check that we actually own the lock
|
|
/// In case the file was deleted on disk, restore it
|
|
/// If we can't get a lock, exit qTox immediately
|
|
/// If we never had a lock in the firt place, exit immediately
|
|
static void assertLock();
|
|
|
|
private:
|
|
static QString lockPathFromName(const QString& name);
|
|
static void deathByBrokenLock(); ///< Print an error then exit immediately
|
|
|
|
private:
|
|
static std::unique_ptr<QLockFile> lockfile;
|
|
static QString curLockName;
|
|
};
|
|
|
|
#endif // PROFILELOCKER_H
|