| /**************************************************************************** |
| ** |
| ** Copyright (C) 2013 David Faure <faure+bluesystems@kde.org> |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
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| ** packaging of this file. Please review the following information to |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #ifndef QLOCKFILE_P_H |
| #define QLOCKFILE_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/private/qglobal_p.h> |
| #include <QtCore/qlockfile.h> |
| #include <QtCore/qfile.h> |
| |
| #include <qplatformdefs.h> |
| |
| #ifdef Q_OS_WIN |
| #include <io.h> |
| #include <qt_windows.h> |
| #endif |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QLockFilePrivate |
| { |
| public: |
| QLockFilePrivate(const QString &fn) |
| : fileName(fn), |
| #ifdef Q_OS_WIN |
| fileHandle(INVALID_HANDLE_VALUE), |
| #else |
| fileHandle(-1), |
| #endif |
| staleLockTime(30 * 1000), // 30 seconds |
| lockError(QLockFile::NoError), |
| isLocked(false) |
| { |
| } |
| QLockFile::LockError tryLock_sys(); |
| bool removeStaleLock(); |
| QByteArray lockFileContents() const; |
| // Returns \c true if the lock belongs to dead PID, or is old. |
| // The attempt to delete it will tell us if it was really stale or not, though. |
| bool isApparentlyStale() const; |
| |
| // used in dbusmenu |
| Q_CORE_EXPORT static QString processNameByPid(qint64 pid); |
| static bool isProcessRunning(qint64 pid, const QString &appname); |
| |
| QString fileName; |
| #ifdef Q_OS_WIN |
| Qt::HANDLE fileHandle; |
| #else |
| int fileHandle; |
| #endif |
| int staleLockTime; // "int milliseconds" is big enough for 24 days |
| QLockFile::LockError lockError; |
| bool isLocked; |
| |
| static int getLockFileHandle(QLockFile *f) |
| { |
| int fd; |
| #ifdef Q_OS_WIN |
| // Use of this function on Windows WILL leak a file descriptor. |
| fd = _open_osfhandle(intptr_t(f->d_func()->fileHandle), 0); |
| #else |
| fd = f->d_func()->fileHandle; |
| #endif |
| QT_LSEEK(fd, 0, SEEK_SET); |
| return fd; |
| } |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif /* QLOCKFILE_P_H */ |