forked from qt-creator/qt-creator
5eeecdb1b4
Calling detach() in setKey() will free the shared memory twice, if we do not set m_memory to nullptr. Clean cleanHandleInternal() does always return true, so checking the value does not make sense. We have to call cleanHandleInternal() immediately after the close. Change-Id: I110693d1dd9dae4ff5e52cfd3fdd2f33137af969 Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
90 lines
2.6 KiB
C++
90 lines
2.6 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 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 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 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 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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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-3.0.html.
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**
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****************************************************************************/
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#pragma once
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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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void 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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