| /**************************************************************************** |
| ** |
| ** 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 |
| |