forked from qt-creator/qt-creator
97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
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/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of Qt Creator.
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**
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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 Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL 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 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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****************************************************************************/
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#ifndef QMLDESIGNER_SHAREDMEMORY_H
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#define QMLDESIGNER_SHAREDMEMORY_H
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#include <QSharedMemory>
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#include <QSystemSemaphore>
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namespace QmlDesigner {
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class SharedMemory
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{
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friend class SharedMemoryLocker;
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public:
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SharedMemory();
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SharedMemory(const QString &key);
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~SharedMemory();
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void setKey(const QString &key);
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QString key() const;
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bool create(int size, QSharedMemory::AccessMode mode = QSharedMemory::ReadWrite);
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int size() const;
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bool attach(QSharedMemory::AccessMode mode = QSharedMemory::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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bool lock();
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bool unlock();
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QSharedMemory::SharedMemoryError error() const;
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QString errorString() const;
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protected:
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#ifdef Q_OS_UNIX
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bool initKeyInternal();
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bool cleanHandleInternal();
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bool createInternal(QSharedMemory::AccessMode mode, int size);
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bool attachInternal(QSharedMemory::AccessMode mode);
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bool detachInternal();
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int handle();
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void setErrorString(const QString &function);
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#endif
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private:
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#ifndef Q_OS_UNIX
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QSharedMemory m_sharedMemory;
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#else
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void *m_memory;
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int m_size;
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QString m_key;
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QByteArray m_nativeKey;
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QSharedMemory::SharedMemoryError m_error;
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QString m_errorString;
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QSystemSemaphore m_systemSemaphore;
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bool m_lockedByMe;
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int m_fileHandle;
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bool m_createdByMe;
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#endif
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};
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} // namespace QmlDesigner
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#endif // QMLDESIGNER_SHAREDMEMORY_H
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