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KDECore

klockfile.h

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00001 /*
00002    This file is part of the KDE libraries
00003    Copyright (c) 2004 Waldo Bastian <bastian@kde.org>
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License version 2 as published by the Free Software Foundation.
00008 
00009    This library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Library General Public License for more details.
00013 
00014    You should have received a copy of the GNU Library General Public License
00015    along with this library; see the file COPYING.LIB.  If not, write to
00016    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017    Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #ifndef KLOCKFILE_H
00021 #define KLOCKFILE_H
00022 
00023 #include <kdecore_export.h>
00024 #include <ksharedptr.h>
00025 #include <kglobal.h>
00026 
00027 class QString;
00028 
00036 class KDECORE_EXPORT KLockFile : public KShared
00037 {
00038 public:
00039    typedef KSharedPtr<KLockFile> Ptr;
00040 
00041    explicit KLockFile(const QString &file, const KComponentData &componentName = KGlobal::mainComponent());
00042 
00046    ~KLockFile();
00047 
00051    enum LockResult {
00055      LockOK = 0,
00056 
00060      LockFail,
00061 
00065      LockError,
00066 
00070      LockStale
00071    };
00072 
00073    enum LockFlag {
00077      NoBlockFlag = 1,
00078 
00083      ForceFlag = 2
00084    };
00085    Q_DECLARE_FLAGS(LockFlags, LockFlag)
00086 
00087    
00092    LockResult lock(LockFlags flags=LockFlags());
00093 
00097    bool isLocked() const;
00098 
00102    void unlock();
00103 
00108    int staleTime() const;
00109 
00113    void setStaleTime(int _staleTime);
00114 
00120    bool getLockInfo(int &pid, QString &hostname, QString &appname);
00121 
00122 private:
00123    class Private;
00124    Private *const d;
00125 };
00126 
00127 Q_DECLARE_OPERATORS_FOR_FLAGS(KLockFile::LockFlags)
00128 
00129 #endif

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