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QmlDesigner.NodeInstances: Shared memory for value changes

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Change-Id: I3c3455f411f18322a062f144e98461691d12ada8
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>
This commit is contained in:
Marco Bubke
2012-09-11 15:11:34 +02:00
parent 505c90dbf7
commit ce9b7bf123
30 changed files with 455 additions and 53 deletions
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81
share/qtcreator/qml/qmlpuppet/commands/valueschangedcommand.cpp
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@@ -30,14 +30,21 @@
#include "valueschangedcommand.h"
#include <QSharedMemory>
#include <QCache>
namespace QmlDesigner {
static QCache<qint32, QSharedMemory> globalSharedMemoryCache(10000);
ValuesChangedCommand::ValuesChangedCommand()
: m_keyNumber(0)
{
}
ValuesChangedCommand::ValuesChangedCommand(const QVector<PropertyValueContainer> &valueChangeVector)
: m_valueChangeVector (valueChangeVector)
: m_valueChangeVector (valueChangeVector),
m_keyNumber(0)
{
}
@@ -46,17 +53,87 @@ 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;
}
}
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)
{
if (command.valueChanges().count() > 5) {
static quint32 keyCounter = 0;
++keyCounter;
command.m_keyNumber = keyCounter;
QByteArray outDataStreamByteArray;
QDataStream temporaryOutDataStream(&outDataStreamByteArray, QIODevice::WriteOnly);
temporaryOutDataStream << command.valueChanges();;
QSharedMemory *sharedMemory = createSharedMemory(keyCounter, outDataStreamByteArray.size());
if (sharedMemory) {
qMemCopy(sharedMemory->data(), outDataStreamByteArray.constData(), sharedMemory->size());
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 >> *valueChangeVector;
}
}
QDataStream &operator>>(QDataStream &in, ValuesChangedCommand &command)
{
in >> command.m_valueChangeVector;
in >> command.m_keyNumber;
if (command.keyNumber() > 0) {
readSharedMemory(command.keyNumber(), &command.m_valueChangeVector);
} else {
in >> command.m_valueChangeVector;
}
return in;
}