qnativeinterface_p.h

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// 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 QNATIVEINTERFACE_P_H
#define QNATIVEINTERFACE_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.
//
 
#include <QtCore/private/qglobal_p.h>
#include <QtCore/qloggingcategory.h>
 
QT_BEGIN_NAMESPACE
 
QT_DECLARE_EXPORTED_QT_LOGGING_CATEGORY(lcNativeInterface, Q_CORE_EXPORT)
 
// Provides a definition for the interface destructor
#define QT_DEFINE_NATIVE_INTERFACE_2(Namespace, InterfaceClass)
    QT_PREPEND_NAMESPACE(Namespace)::InterfaceClass::~InterfaceClass() = default
 
#define QT_DEFINE_NATIVE_INTERFACE(...)
    QT_OVERLOADED_MACRO(QT_DEFINE_NATIVE_INTERFACE, QNativeInterface, __VA_ARGS__)
#define QT_DEFINE_PRIVATE_NATIVE_INTERFACE(...)
    QT_OVERLOADED_MACRO(QT_DEFINE_NATIVE_INTERFACE, QNativeInterface::Private, __VA_ARGS__)
 
#define QT_NATIVE_INTERFACE_RETURN_IF(NativeInterface, baseType)
    {
        using QNativeInterface::Private::TypeInfo;
        qCDebug(lcNativeInterface, "Comparing requested interface name %s with available %s",
                name, TypeInfo<NativeInterface>::name());
        if (qstrcmp(name, TypeInfo<NativeInterface>::name()) == 0) {
            qCDebug(lcNativeInterface,
                    "Match for interface %s. Comparing revisions (requested %d / available %d)",
                    name, revision, TypeInfo<NativeInterface>::revision());
            if (revision == TypeInfo<NativeInterface>::revision()) {
                qCDebug(lcNativeInterface, "Full match. Returning dynamic cast of %p", baseType);
                return dynamic_cast<NativeInterface *>(baseType);
            } else {
                qCWarning(lcNativeInterface,
                          "Native interface revision mismatch (requested %d / available %d) for "
                          "interface %s",
                          revision, TypeInfo<NativeInterface>::revision(), name);
                return nullptr;
            }
        } else {
            qCDebug(lcNativeInterface, "No match for requested interface name %s", name);
        }
    }
 
QT_END_NAMESPACE
 
#endif // QNATIVEINTERFACE_P_H