qfactorycacheregistration.cpp

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++ // Copyright (C) 2022 The Qt Company Ltd.

++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

++ // Qt-Security score:significant reason:default

++

++ #include "qfactorycacheregistration_p.h"

++

++ #include <QtCore/QMutex>

++

++ QT_BEGIN_NAMESPACE

++

++ #ifdef QT_USE_FACTORY_CACHE_REGISTRATION

++

++ static QBasicMutex registrationMutex;

++ static detail::QWinRTFactoryCacheRegistration *firstElement;

++

++ detail::QWinRTFactoryCacheRegistration::QWinRTFactoryCacheRegistration(

++         QFunctionPointer clearFunction)

++     : m_clearFunction(clearFunction)

++ {

++     QMutexLocker lock(&registrationMutex);

++

++     // forward pointers

++     m_next = std::exchange(firstElement, this);

++

++     // backward pointers

++     m_prevNext = &firstElement;

++     if (m_next)

++         m_next->m_prevNext = &m_next;

++ }

++

++ detail::QWinRTFactoryCacheRegistration::~QWinRTFactoryCacheRegistration()

++ {

++     QMutexLocker lock(&registrationMutex);

++

++     *m_prevNext = m_next;

++

++     if (m_next)

++         m_next->m_prevNext = m_prevNext;

++ }

++

++ void detail::QWinRTFactoryCacheRegistration::clearAllCaches()

++ {

++     QMutexLocker lock(&registrationMutex);

++

++     detail::QWinRTFactoryCacheRegistration *element;

++

++     for (element = firstElement; element != nullptr; element = element->m_next) {

++         element->m_clearFunction();

++     }

++ }

++

++ #endif

++

++ QT_END_NAMESPACE