138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QSHAREDMEMORY_H
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#define QSHAREDMEMORY_H
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#include <QtCore/qglobal.h>
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#ifndef QT_NO_QOBJECT
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# include <QtCore/qobject.h>
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#else
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# include <QtCore/qobjectdefs.h>
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# include <QtCore/qscopedpointer.h>
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# include <QtCore/qstring.h>
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#endif
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QT_BEGIN_NAMESPACE
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#ifndef QT_NO_SHAREDMEMORY
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class QSharedMemoryPrivate;
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class Q_CORE_EXPORT QSharedMemory
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#ifndef QT_NO_QOBJECT
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: public QObject
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#endif
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{
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#ifndef QT_NO_QOBJECT
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Q_OBJECT
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#endif
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Q_DECLARE_PRIVATE(QSharedMemory)
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public:
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enum AccessMode
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{
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ReadOnly,
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ReadWrite
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};
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enum SharedMemoryError
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{
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NoError,
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PermissionDenied,
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InvalidSize,
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KeyError,
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AlreadyExists,
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NotFound,
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LockError,
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OutOfResources,
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UnknownError
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};
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#ifndef QT_NO_QOBJECT
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QSharedMemory(QObject *parent = nullptr);
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QSharedMemory(const QString &key, QObject *parent = nullptr);
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#else
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QSharedMemory();
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QSharedMemory(const QString &key);
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static QString tr(const char * str)
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{
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return QString::fromLatin1(str);
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}
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#endif
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~QSharedMemory();
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void setKey(const QString &key);
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QString key() const;
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void setNativeKey(const QString &key);
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QString nativeKey() const;
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bool create(qsizetype size, AccessMode mode = ReadWrite);
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qsizetype size() const;
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bool attach(AccessMode mode = ReadWrite);
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bool isAttached() const;
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bool detach();
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void *data();
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const void* constData() const;
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const void *data() const;
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#ifndef QT_NO_SYSTEMSEMAPHORE
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bool lock();
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bool unlock();
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#endif
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SharedMemoryError error() const;
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QString errorString() const;
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private:
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Q_DISABLE_COPY(QSharedMemory)
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#ifdef QT_NO_QOBJECT
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QScopedPointer<QSharedMemoryPrivate> d_ptr;
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#endif
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};
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#endif // QT_NO_SHAREDMEMORY
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QT_END_NAMESPACE
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#endif // QSHAREDMEMORY_H
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