mirror of
https://github.com/qTox/qTox.git
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117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
/*
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Copyright © 2015 by The qTox Project
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This file is part of qTox, a Qt-based graphical interface for Tox.
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qTox is libre 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 3 of the License, or
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(at your option) any later version.
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qTox 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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You should have received a copy of the GNU General Public License
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along with qTox. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "profilelocker.h"
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#include "src/persistence/settings.h"
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#include <QDir>
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#include <QDebug>
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using namespace std;
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unique_ptr<QLockFile> ProfileLocker::lockfile;
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QString ProfileLocker::curLockName;
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QString ProfileLocker::lockPathFromName(const QString& name)
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{
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return Settings::getInstance().getSettingsDirPath()+'/'+name+".lock";
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}
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bool ProfileLocker::isLockable(QString profile)
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{
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// If we already have the lock, it's definitely lockable
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if (lockfile && curLockName == profile)
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return true;
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QLockFile newLock(lockPathFromName(profile));
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return newLock.tryLock();
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}
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bool ProfileLocker::lock(QString profile)
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{
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if (lockfile && curLockName == profile)
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return true;
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QLockFile* newLock = new QLockFile(lockPathFromName(profile));
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newLock->setStaleLockTime(0);
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if (!newLock->tryLock())
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{
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delete newLock;
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return false;
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}
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unlock();
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lockfile.reset(newLock);
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curLockName = profile;
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return true;
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}
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void ProfileLocker::unlock()
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{
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if (!lockfile)
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return;
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lockfile->unlock();
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delete lockfile.release();
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lockfile = nullptr;
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curLockName.clear();
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}
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void ProfileLocker::assertLock()
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{
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if (!lockfile)
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{
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qCritical() << "assertLock: We don't seem to own any lock!";
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deathByBrokenLock();
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}
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if (!QFile(lockPathFromName(curLockName)).exists())
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{
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QString tmp = curLockName;
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unlock();
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if (lock(tmp))
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{
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qCritical() << "assertLock: Lock file was lost, but could be restored";
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}
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else
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{
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qCritical() << "assertLock: Lock file was lost, and could *NOT* be restored";
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deathByBrokenLock();
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}
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}
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}
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void ProfileLocker::deathByBrokenLock()
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{
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qCritical() << "Lock is *BROKEN*, exiting immediately";
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abort();
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}
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bool ProfileLocker::hasLock()
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{
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return lockfile.operator bool();
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}
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QString ProfileLocker::getCurLockName()
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{
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if (lockfile)
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return curLockName;
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else
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return QString();
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}
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