/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtCore module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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, Nokia gives you certain additional | |
** rights. These rights are described in the Nokia 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. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
** | |
** | |
** | |
** | |
** | |
** $QT_END_LICENSE$ | |
** | |
****************************************************************************/ | |
#ifndef QSHAREDMEMORY_P_H | |
#define QSHAREDMEMORY_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 "qsharedmemory.h" | |
#ifdef QT_NO_SHAREDMEMORY | |
# ifndef QT_NO_SYSTEMSEMAPHORE | |
namespace QSharedMemoryPrivate | |
{ | |
int createUnixKeyFile(const QString &fileName); | |
QString makePlatformSafeKey(const QString &key, | |
const QString &prefix = QLatin1String("qipc_sharedmemory_")); | |
} | |
#endif | |
#else | |
#include "qsystemsemaphore.h" | |
#include "private/qobject_p.h" | |
#ifdef Q_OS_WIN | |
#include <qt_windows.h> | |
#elif defined(Q_OS_SYMBIAN) | |
#include <e32std.h> | |
#include <sys/types.h> | |
#else | |
#include <sys/sem.h> | |
#endif | |
QT_BEGIN_NAMESPACE | |
#ifndef QT_NO_SYSTEMSEMAPHORE | |
/*! | |
Helper class | |
*/ | |
class QSharedMemoryLocker | |
{ | |
public: | |
inline QSharedMemoryLocker(QSharedMemory *sharedMemory) : q_sm(sharedMemory) | |
{ | |
Q_ASSERT(q_sm); | |
} | |
inline ~QSharedMemoryLocker() | |
{ | |
if (q_sm) | |
q_sm->unlock(); | |
} | |
inline bool lock() | |
{ | |
if (q_sm && q_sm->lock()) | |
return true; | |
q_sm = 0; | |
return false; | |
} | |
private: | |
QSharedMemory *q_sm; | |
}; | |
#endif // QT_NO_SYSTEMSEMAPHORE | |
class Q_AUTOTEST_EXPORT QSharedMemoryPrivate : public QObjectPrivate | |
{ | |
Q_DECLARE_PUBLIC(QSharedMemory) | |
public: | |
QSharedMemoryPrivate(); | |
void *memory; | |
int size; | |
QString key; | |
QSharedMemory::SharedMemoryError error; | |
QString errorString; | |
#ifndef QT_NO_SYSTEMSEMAPHORE | |
QSystemSemaphore systemSemaphore; | |
bool lockedByMe; | |
#endif | |
static int createUnixKeyFile(const QString &fileName); | |
static QString makePlatformSafeKey(const QString &key, | |
const QString &prefix = QLatin1String("qipc_sharedmemory_")); | |
#ifdef Q_OS_WIN | |
HANDLE handle(); | |
#else | |
key_t handle(); | |
#endif | |
bool initKey(); | |
bool cleanHandle(); | |
bool create(int size); | |
bool attach(QSharedMemory::AccessMode mode); | |
bool detach(); | |
#ifdef Q_OS_SYMBIAN | |
void setErrorString(const QString &function, TInt errorCode); | |
#else | |
void setErrorString(const QString &function); | |
#endif | |
#ifndef QT_NO_SYSTEMSEMAPHORE | |
bool tryLocker(QSharedMemoryLocker *locker, const QString function) { | |
if (!locker->lock()) { | |
errorString = QSharedMemory::tr("%1: unable to lock").arg(function); | |
error = QSharedMemory::LockError; | |
return false; | |
} | |
return true; | |
} | |
#endif // QT_NO_SYSTEMSEMAPHORE | |
private: | |
#ifdef Q_OS_WIN | |
HANDLE hand; | |
#elif defined(Q_OS_SYMBIAN) | |
RChunk chunk; | |
#else | |
key_t unix_key; | |
#endif | |
}; | |
QT_END_NAMESPACE | |
#endif // QT_NO_SHAREDMEMORY | |
#endif // QSHAREDMEMORY_P_H | |