-
Tim Jenssen authored
Change-Id: I7381d4c236be59ddd2015b83e9d5eb90e2cb2006 Reviewed-by:
Marco Bubke <marco.bubke@digia.com>
Tim Jenssen authoredChange-Id: I7381d4c236be59ddd2015b83e9d5eb90e2cb2006 Reviewed-by:
Marco Bubke <marco.bubke@digia.com>
valueschangedcommand.cpp 5.23 KiB
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
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** accordance with the commercial license agreement provided with the
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** 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.
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****************************************************************************/
#include "valueschangedcommand.h"
#include <QSharedMemory>
#include <QCache>
#include <QDebug>
#include <cstring>
namespace QmlDesigner {
static QCache<qint32, QSharedMemory> globalSharedMemoryCache(10000);
ValuesChangedCommand::ValuesChangedCommand()
: m_keyNumber(0)
{
}
ValuesChangedCommand::ValuesChangedCommand(const QVector<PropertyValueContainer> &valueChangeVector)
: m_valueChangeVector (valueChangeVector),
m_keyNumber(0)
{
}
QVector<PropertyValueContainer> ValuesChangedCommand::valueChanges() const
{
return m_valueChangeVector;
}
quint32 ValuesChangedCommand::keyNumber() const
{
return m_keyNumber;
}
void ValuesChangedCommand::removeSharedMemorys(const QVector<qint32> &keyNumberVector)
{
foreach (qint32 keyNumber, keyNumberVector) {
QSharedMemory *sharedMemory = globalSharedMemoryCache.take(keyNumber);
delete sharedMemory;
}
}
void ValuesChangedCommand::sort()
{
qSort(m_valueChangeVector);
}
static const QLatin1String valueKeyTemplateString("Values-%1");
static QSharedMemory *createSharedMemory(qint32 key, int byteCount)
{
QSharedMemory *sharedMemory = new QSharedMemory(QString(valueKeyTemplateString).arg(key));
bool sharedMemoryIsCreated = sharedMemory->create(byteCount);
if (!sharedMemoryIsCreated) {
if (sharedMemory->isAttached())
sharedMemory->attach();
sharedMemory->detach();
sharedMemoryIsCreated = sharedMemory->create(byteCount);
}
if (sharedMemoryIsCreated) {
globalSharedMemoryCache.insert(key, sharedMemory);
return sharedMemory;
}
return 0;
}
QDataStream &operator<<(QDataStream &out, const ValuesChangedCommand &command)
{
static const bool dontUseSharedMemory = !qgetenv("DESIGNER_DONT_USE_SHARED_MEMORY").isEmpty();
if (!dontUseSharedMemory && command.valueChanges().count() > 5) {
static quint32 keyCounter = 0;
++keyCounter;
command.m_keyNumber = keyCounter;
QByteArray outDataStreamByteArray;
QDataStream temporaryOutDataStream(&outDataStreamByteArray, QIODevice::WriteOnly);
temporaryOutDataStream.setVersion(QDataStream::Qt_4_8);
temporaryOutDataStream << command.valueChanges();
QSharedMemory *sharedMemory = createSharedMemory(keyCounter, outDataStreamByteArray.size());
if (sharedMemory) {
sharedMemory->lock();
std::memcpy(sharedMemory->data(), outDataStreamByteArray.constData(), sharedMemory->size());
sharedMemory->unlock();
out << command.keyNumber();
return out;
}
}
out << qint32(0);
out << command.valueChanges();
return out;
}
void readSharedMemory(qint32 key, QVector<PropertyValueContainer> *valueChangeVector)
{
QSharedMemory sharedMemory(QString(valueKeyTemplateString).arg(key));
bool canAttach = sharedMemory.attach(QSharedMemory::ReadOnly);
if (canAttach) {
QDataStream in(QByteArray::fromRawData(static_cast<const char*>(sharedMemory.constData()), sharedMemory.size()));
in.setVersion(QDataStream::Qt_4_8);
in >> *valueChangeVector;
}
}
QDataStream &operator>>(QDataStream &in, ValuesChangedCommand &command)
{
in >> command.m_keyNumber;
if (command.keyNumber() > 0) {
readSharedMemory(command.keyNumber(), &command.m_valueChangeVector);
} else {
in >> command.m_valueChangeVector;
}
return in;
}
bool operator ==(const ValuesChangedCommand &first, const ValuesChangedCommand &second)
{
return first.m_valueChangeVector == second.m_valueChangeVector;
}
QDebug operator <<(QDebug debug, const ValuesChangedCommand &command)
{
return debug.nospace() << "ValuesChangedCommand("
<< "keyNumber: " << command.keyNumber() << ", "
<< command.valueChanges() << ")";
}
} // namespace QmlDesigner