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- /*
- This file is part of libkabc.
-
- Copyright (c) 2001,2003 Cornelius Schumacher <schumacher@kde.org>
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public License
- along with this library; see the file COPYING.LIB. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
- */
- #ifndef KABC_LOCK_H
- #define KABC_LOCK_H
-
- #include <qstring.h>
- #include <qobject.h>
-
- #include <kdelibs_export.h>
-
- namespace KABC {
-
- /**
- This class provides locking functionality for a file, directory or an
- arbitrary string-represented resource.
- */
- class KABC_EXPORT Lock : public QObject
- {
- Q_OBJECT
- public:
- /**
- Constructor.
-
- @param identifier An identifier for the resource to be locked, e.g. a file
- name.
- */
- Lock( const QString &identifier );
-
- /**
- Destruct lock object. This also removes the lock on the resource.
- */
- ~Lock();
-
- /**
- Lock resource.
- */
- virtual bool lock();
-
- /**
- Unlock resource.
- */
- virtual bool unlock();
-
- virtual QString error() const;
-
- QString lockFileName() const;
-
- static bool readLockFile( const QString &filename, int &pid, QString &app );
- static bool writeLockFile( const QString &filename );
-
- static QString locksDir();
-
- signals:
- void locked();
- void unlocked();
-
- private:
- QString mIdentifier;
-
- QString mLockUniqueName;
-
- QString mError;
-
- class Private;
- Private *d;
- };
-
- }
-
- #endif
-