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diff --git a/src/core/jobs/dependencyhandler_p.h b/src/core/jobs/dependencyhandler_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3D_DEPENDENCYHANDLER_P_H
+#define QT3D_DEPENDENCYHANDLER_P_H
+
+#include "task_p.h"
+
+#include <QtCore/QMutex>
+#include <QtCore/QVector>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+struct Dependency
+{
+    Dependency() {}
+    Dependency(QSharedPointer<TaskInterface> depender, QSharedPointer<TaskInterface> dependee)
+        : depender(qMove(depender)),
+          dependee(qMove(dependee)) {}
+
+    QSharedPointer<TaskInterface> depender;
+    QSharedPointer<TaskInterface> dependee;
+};
+
+} // namespace Qt3D
+
+template <>
+class QTypeInfo<Qt3D::Dependency> : public QTypeInfoMerger<Qt3D::Dependency, QSharedPointer<Qt3D::TaskInterface> > {};
+
+namespace Qt3D {
+
+inline bool operator==(const Dependency &left, const Dependency &right)
+{
+    return left.depender == right.depender && left.dependee == right.dependee;
+}
+
+inline bool operator!=(const Dependency &left, const Dependency &right)
+{
+    return !operator==(left, right);
+}
+
+class DependencyHandler
+{
+public:
+    DependencyHandler();
+
+    void addDependencies(QVector<Dependency> dependencies);
+    bool hasDependency(const QSharedPointer<TaskInterface> &depender);
+    void freeDependencies(const QSharedPointer<TaskInterface> &dependee);
+
+private:
+    Q_DISABLE_COPY(DependencyHandler)
+
+    QVector<Dependency> m_dependencyMap;
+    mutable QMutex m_mutex;
+};
+
+} // namespace Qt3D
+
+QT_END_NAMESPACE
+
+#endif // QT3D_DEPENDENCYHANDLER_P_H
+