1 files changed, 58 insertions, 0 deletions
diff --git a/src/multimedia/windows/qcomptr_p.h b/src/multimedia/windows/qcomptr_p.h
new file mode 100644
index 000000000..fd63c4a32
--- /dev/null
+++ b/src/multimedia/windows/qcomptr_p.h
@@ -0,0 +1,58 @@
+// Copyright (C) 2021 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
+
+#ifndef QCOMPTR_P_H
+#define QCOMPTR_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+template <class T>
+class QComPtr
+{
+public:
+    explicit QComPtr(T *ptr) : m_ptr(ptr) {}
+    QComPtr() : m_ptr(nullptr) {}
+    QComPtr(const QComPtr<T> &uiPtr) : m_ptr(uiPtr.m_ptr) { if (m_ptr) m_ptr->AddRef(); }
+    QComPtr(QComPtr<T> &&uiPtr) : m_ptr(uiPtr.m_ptr) { uiPtr.m_ptr = nullptr; }
+    ~QComPtr() { if (m_ptr) m_ptr->Release(); }
+
+    QComPtr& operator=(const QComPtr<T> &rhs) {
+        if (this != &rhs) {
+            if (m_ptr)
+                m_ptr->Release();
+            m_ptr = rhs.m_ptr;
+            m_ptr->AddRef();
+        }
+        return *this;
+    }
+
+    QComPtr& operator=(QComPtr<T> &&rhs) noexcept {
+        if (m_ptr)
+            m_ptr->Release();
+        m_ptr = rhs.m_ptr;
+        rhs.m_ptr = nullptr;
+        return *this;
+    }
+
+    explicit operator bool() const { return m_ptr != nullptr; }
+    T *operator->() const { return m_ptr; }
+
+    T **address() { Q_ASSERT(m_ptr == nullptr); return &m_ptr; }
+    void reset(T *ptr = nullptr) { if (m_ptr) m_ptr->Release(); m_ptr = ptr; }
+    T *release() { T *ptr = m_ptr; m_ptr = nullptr; return ptr; }
+    T *get() const { return m_ptr; }
+
+private:
+    T *m_ptr;
+};
+
+#endif