Asynchronous component instantiation

This introduces two main:

    * the QML compiler executes in a separate thread
    * item instantiation can be interrupted and resumed to
      allow it to be split across multiple frames.

Task-number: QTBUG-21151
Change-Id: I9631c62bb77da3a2e0c37f0da3719533fdce4fef
Reviewed-on: http://codereview.qt-project.org/5676
Reviewed-by: Martin Jones <martin.jones@nokia.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/src/declarative/qml/qdeclarativeincubator_p.h b/src/declarative/qml/qdeclarativeincubator_p.h
new file mode 100644
index 0000000000..8210f6d3f6
--- /dev/null
+++ b/src/declarative/qml/qdeclarativeincubator_p.h
@@ -0,0 +1,96 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 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 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDECLARATIVEINCUBATOR_P_H
+#define QDECLARATIVEINCUBATOR_P_H
+
+#include <private/qintrusivelist_p.h>
+#include <private/qdeclarativevme_p.h>
+#include <private/qdeclarativeengine_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.
+//
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeCompiledData;
+class QDeclarativeIncubator;
+class QDeclarativeIncubatorPrivate : public QDeclarativeEnginePrivate::Incubator
+{
+    QIntrusiveListNode nextWaitingFor;
+public:
+    QDeclarativeIncubatorPrivate(QDeclarativeIncubator *q, QDeclarativeIncubator::IncubationMode m);
+    ~QDeclarativeIncubatorPrivate();
+
+    QDeclarativeIncubator *q;
+
+    QDeclarativeIncubator::IncubationMode mode;
+
+    QList<QDeclarativeError> errors;
+
+    enum Progress { Execute, Completing, Completed };
+    Progress progress;
+
+    QObject *result;
+    QDeclarativeCompiledData *component;
+    QDeclarativeVME vme;
+
+    typedef QDeclarativeIncubatorPrivate QIP;
+    QIP *waitingOnMe;
+    QIntrusiveList<QIP, &QIP::nextWaitingFor> waitingFor;
+
+    void clear();
+
+    void incubate(QDeclarativeVME::Interrupt &i);
+};
+
+QT_END_NAMESPACE
+
+#endif // QDECLARATIVEINCUBATOR_P_H
+