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// Copyright (C) 2013 David Faure <faure+bluesystems@kde.org>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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 */
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