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Diffstat (limited to 'src/corelib/io/qlockfile_p.h')
-rw-r--r-- | src/corelib/io/qlockfile_p.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/corelib/io/qlockfile_p.h b/src/corelib/io/qlockfile_p.h new file mode 100644 index 0000000000..e046e87cf4 --- /dev/null +++ b/src/corelib/io/qlockfile_p.h @@ -0,0 +1,104 @@ +/**************************************************************************** +** +** Copyright (C) 2013 David Faure <faure+bluesystems@kde.org> +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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/qlockfile.h> +#include <QtCore/qfile.h> + +#ifdef Q_OS_WIN +#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(); + bool getLockInfo(qint64 *pid, QString *hostname, QString *appname) const; + // Returns 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; + +#ifdef Q_OS_UNIX + static int checkFcntlWorksAfterFlock(); +#endif + + 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; +}; + +QT_END_NAMESPACE + +#endif /* QLOCKFILE_P_H */ |