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kabc

lock.h

00001 /*
00002     This file is part of libkabc.
00003 
00004     Copyright (c) 2001,2003 Cornelius Schumacher <schumacher@kde.org>
00005 
00006     This library is free software; you can redistribute it and/or
00007     modify it under the terms of the GNU Library General Public
00008     License as published by the Free Software Foundation; either
00009     version 2 of the License, or (at your option) any later version.
00010 
00011     This library is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014     Library General Public License for more details.
00015 
00016     You should have received a copy of the GNU Library General Public License
00017     along with this library; see the file COPYING.LIB.  If not, write to
00018     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019     Boston, MA 02110-1301, USA.
00020 */
00021 #ifndef KABC_LOCK_H
00022 #define KABC_LOCK_H
00023 
00024 #include <qstring.h>
00025 #include <qobject.h>
00026 
00027 #include <kdelibs_export.h>
00028 
00029 namespace KABC {
00030 
00035 class KABC_EXPORT Lock : public QObject
00036 {
00037     Q_OBJECT
00038   public:
00045     Lock( const QString &identifier );
00046 
00050     ~Lock();
00051 
00055     virtual bool lock();
00056     
00060     virtual bool unlock();
00061 
00062     virtual QString error() const;
00063 
00064     QString lockFileName() const;
00065 
00066     static bool readLockFile( const QString &filename, int &pid, QString &app );
00067     static bool writeLockFile( const QString &filename );
00068 
00069     static QString locksDir();
00070 
00071   signals:
00072     void locked();
00073     void unlocked();
00074 
00075   private:
00076     QString mIdentifier;
00077     
00078     QString mLockUniqueName;
00079 
00080     QString mError;
00081 
00082     class Private;
00083     Private *d;
00084 };
00085 
00086 }
00087 
00088 #endif

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