1 files changed, 53 insertions, 0 deletions
diff --git a/src/corelib/platform/windows/qfactorycacheregistration.cpp b/src/corelib/platform/windows/qfactorycacheregistration.cpp
new file mode 100644
index 0000000000..6bd69c66d1
--- /dev/null
+++ b/src/corelib/platform/windows/qfactorycacheregistration.cpp
@@ -0,0 +1,53 @@
+// 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
+
+#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