From 843202b6083f2b9d01391558b7e6e3e0d014cca6 Mon Sep 17 00:00:00 2001 From: Lars Knoll Date: Sat, 25 Jan 2014 22:22:47 +0100 Subject: Move PersistenValue and WeakValue into it's own file They deserve having their own set of files, and it helps reduce dependencies. Change-Id: Ifd4394f88ef51cbccc61bf92dd20636f570141d9 Reviewed-by: Simon Hausmann --- src/qml/jsruntime/qv4persistent_p.h | 168 ++++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 src/qml/jsruntime/qv4persistent_p.h (limited to 'src/qml/jsruntime/qv4persistent_p.h') diff --git a/src/qml/jsruntime/qv4persistent_p.h b/src/qml/jsruntime/qv4persistent_p.h new file mode 100644 index 0000000000..07e8ee9775 --- /dev/null +++ b/src/qml/jsruntime/qv4persistent_p.h @@ -0,0 +1,168 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#ifndef QV4PERSISTENT_H +#define QV4PERSISTENT_H + +#include "qv4value_inl_p.h" + +QT_BEGIN_NAMESPACE + +namespace QV4 { + +struct Q_QML_PRIVATE_EXPORT PersistentValuePrivate +{ + PersistentValuePrivate(ReturnedValue v, ExecutionEngine *engine = 0, bool weak = false); + virtual ~PersistentValuePrivate(); + Value value; + uint refcount; + bool weak; + QV4::ExecutionEngine *engine; + PersistentValuePrivate **prev; + PersistentValuePrivate *next; + + void init(); + void removeFromList(); + void ref() { ++refcount; } + void deref(); + PersistentValuePrivate *detach(const ReturnedValue value, bool weak = false); + + bool checkEngine(QV4::ExecutionEngine *otherEngine) { + if (!engine) { + Q_ASSERT(!value.isObject()); + engine = otherEngine; + } + return (engine == otherEngine); + } +}; + +class Q_QML_EXPORT PersistentValue +{ +public: + PersistentValue() : d(0) {} + PersistentValue(const PersistentValue &other); + PersistentValue &operator=(const PersistentValue &other); + + PersistentValue(const ValueRef val); + PersistentValue(ReturnedValue val); + template + PersistentValue(Returned *obj); + template + PersistentValue(const Referenced obj); + PersistentValue &operator=(const ValueRef other); + PersistentValue &operator =(ReturnedValue other); + template + PersistentValue &operator=(Returned *obj); + template + PersistentValue &operator=(const Referenced obj); + ~PersistentValue(); + + ReturnedValue value() const { + return (d ? d->value.asReturnedValue() : Primitive::undefinedValue().asReturnedValue()); + } + + ExecutionEngine *engine() { + if (!d) + return 0; + if (d->engine) + return d->engine; + Managed *m = d->value.asManaged(); + return m ? m->engine() : 0; + } + + bool isUndefined() const { return !d || d->value.isUndefined(); } + bool isNullOrUndefined() const { return !d || d->value.isNullOrUndefined(); } + void clear() { + *this = PersistentValue(); + } + +private: + friend struct ValueRef; + PersistentValuePrivate *d; +}; + +class Q_QML_EXPORT WeakValue +{ +public: + WeakValue() : d(0) {} + WeakValue(const ValueRef val); + WeakValue(const WeakValue &other); + WeakValue(ReturnedValue val); + template + WeakValue(Returned *obj); + WeakValue &operator=(const WeakValue &other); + WeakValue &operator=(const ValueRef other); + WeakValue &operator =(const ReturnedValue &other); + template + WeakValue &operator=(Returned *obj); + + ~WeakValue(); + + ReturnedValue value() const { + return (d ? d->value.asReturnedValue() : Primitive::undefinedValue().asReturnedValue()); + } + + ExecutionEngine *engine() { + if (!d) + return 0; + if (d->engine) + return d->engine; + Managed *m = d->value.asManaged(); + return m ? m->engine() : 0; + } + + bool isUndefined() const { return !d || d->value.isUndefined(); } + bool isNullOrUndefined() const { return !d || d->value.isNullOrUndefined(); } + void clear() { + *this = WeakValue(); + } + + void markOnce(ExecutionEngine *e); + +private: + friend struct ValueRef; + PersistentValuePrivate *d; +}; + +} // namespace QV4 + +QT_END_NAMESPACE + +#endif -- cgit v1.2.3