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33
34#include "qvaluespacemanager_p.h"
35#include "gconflayer_p.h"
36#include "registrylayer_win_p.h"
37
38#include <QtCore/qmutex.h>
39#include <QtCore/qthread.h>
40#include <QtCore/private/qcoreapplication_p.h>
41
42QT_BEGIN_NAMESPACE
43
44static QBasicAtomicPointer<QValueSpaceManager> valueSpaceManager_ptr;
45
46QValueSpaceManager *QValueSpaceManager::instance()
47{
48 QValueSpaceManager *ptr = valueSpaceManager_ptr.loadAcquire();
49 if (!ptr) {
50 static QBasicMutex valueSpaceManager_mutex;
51 QMutexLocker locker(&valueSpaceManager_mutex);
52 if (!(ptr = valueSpaceManager_ptr.loadAcquire())) {
53 ptr = new QValueSpaceManager;
54
55 // make sure layers are installed in the priority order from high to low
56#if defined(Q_OS_LINUX)
57#if !defined(QT_NO_GCONFLAYER)
58 ptr->layers.append(GConfLayer::instance());
59#endif
60#elif defined(Q_OS_WIN)
61 ptr->layers.append(NonVolatileRegistryLayer::instance());
62 ptr->layers.append(VolatileRegistryLayer::instance());
63#endif
64
65 // move all layers to a worker thread
66 if (ptr->layers.size() > 0) {
67 QThread *valueSpaceThread = new QThread();
68 valueSpaceThread->setObjectName(QStringLiteral("valueSpaceThread"));
69 valueSpaceThread->moveToThread(thread: QCoreApplicationPrivate::mainThread());
70 for (int i = 0; i < ptr->layers.size(); ++i)
71 ptr->layers[i]->moveToThread(thread: valueSpaceThread);
72 valueSpaceThread->start();
73 }
74
75 valueSpaceManager_ptr.storeRelease(newValue: ptr);
76 }
77 }
78 return ptr;
79}
80
81QValueSpaceManager::QValueSpaceManager()
82{
83}
84
85QList<QAbstractValueSpaceLayer *> const &QValueSpaceManager::getLayers()
86{
87 return layers;
88}
89
90QT_END_NAMESPACE
91

source code of qtsystems/src/publishsubscribe/qvaluespacemanager.cpp