Check for Q_GLOBAL_STATIC returning 0 (simulator plugin).

Consolidate all of the Q_GLOBAL_STATIC data into 1 class so we have one
lifetime to manage. Provide a static instance() method for use outside
of the .cpp file and check for this returning 0.

Change-Id: I243e2c5497e1c018ab7713bd9ef43ac22a658ff7
Reviewed-by: Lorn Potter <lorn.potter@nokia.com>
Reviewed-by: Zsolt Simon <zsolt.simon@nokia.com>

9 files changed, 45 insertions, 66 deletions

diff --git a/src/plugins/sensors/simulator/simulatoraccelerometer.cpp b/src/plugins/sensors/simulator/simulatoraccelerometer.cpp
index 8ab6c1a..e40dd0b 100644
--- a/src/plugins/sensors/simulator/simulatoraccelerometer.cpp
+++ b/src/plugins/sensors/simulator/simulatoraccelerometer.cpp
@@ -53,7 +53,7 @@ SimulatorAccelerometer::SimulatorAccelerometer(QSensor *sensor)
 
 void SimulatorAccelerometer::poll()
 {
-    QtMobility::QAccelerometerReadingData data = get_qtAccelerometerData();
+    QtMobility::QAccelerometerReadingData data = SensorsConnection::instance()->qtAccelerometerData;
     quint64 newTimestamp;
     if (!data.timestamp.isValid())
         newTimestamp = QDateTime::currentDateTime().toTime_t();
diff --git a/src/plugins/sensors/simulator/simulatorambientlightsensor.cpp b/src/plugins/sensors/simulator/simulatorambientlightsensor.cpp
index 6b9d387..8ae0169 100644
--- a/src/plugins/sensors/simulator/simulatorambientlightsensor.cpp
+++ b/src/plugins/sensors/simulator/simulatorambientlightsensor.cpp
@@ -53,7 +53,7 @@ SimulatorAmbientLightSensor::SimulatorAmbientLightSensor(QSensor *sensor)
 
 void SimulatorAmbientLightSensor::poll()
 {
-    QtMobility::QAmbientLightReadingData data = get_qtAmbientLightData();
+    QtMobility::QAmbientLightReadingData data = SensorsConnection::instance()->qtAmbientLightData;
     QAmbientLightReading::LightLevel convertedLightLevel;
     switch (data.lightLevel) {
     case QtMobility::Dark:
diff --git a/src/plugins/sensors/simulator/simulatorcommon.cpp b/src/plugins/sensors/simulator/simulatorcommon.cpp
index 76df155..900b6bd 100644
--- a/src/plugins/sensors/simulator/simulatorcommon.cpp
+++ b/src/plugins/sensors/simulator/simulatorcommon.cpp
@@ -47,13 +47,6 @@
 
 using namespace Simulator;
 
-Q_GLOBAL_STATIC(QtMobility::QAmbientLightReadingData, qtAmbientLightData)
-Q_GLOBAL_STATIC(QtMobility::QLightReadingData, qtLightData)
-Q_GLOBAL_STATIC(QtMobility::QAccelerometerReadingData, qtAccelerometerData)
-Q_GLOBAL_STATIC(QtMobility::QMagnetometerReadingData, qtMagnetometerData)
-Q_GLOBAL_STATIC(QtMobility::QCompassReadingData, qtCompassData)
-Q_GLOBAL_STATIC(QtMobility::QProximityReadingData, qtProximityData)
-Q_GLOBAL_STATIC(QtMobility::QIRProximityReadingData, qtIRProximityData)
 Q_GLOBAL_STATIC(SensorsConnection, sensorsConnection)
 
 class SimulatorAsyncConnection: public QThread
@@ -146,39 +139,47 @@ SensorsConnection::~SensorsConnection()
     delete mConnection;
 }
 
+SensorsConnection *SensorsConnection::instance()
+{
+    SensorsConnection *connection = sensorsConnection();
+    // It's safe to return 0 because this is checked when used
+    //if (!connection) qFatal("Cannot return from SensorsConnection::instance because sensorsConnection() returned 0");
+    return connection;
+}
+
 void SensorsConnection::setAmbientLightData(const QtMobility::QAmbientLightReadingData &data)
 {
-    *qtAmbientLightData() = data;
+    qtAmbientLightData = data;
 }
 
 void SensorsConnection::setLightData(const QtMobility::QLightReadingData &data)
 {
-    *qtLightData() = data;
+    qtLightData = data;
 }
 
 void SensorsConnection::setAccelerometerData(const QtMobility::QAccelerometerReadingData &data)
 {
-    *qtAccelerometerData() = data;
+    qtAccelerometerData = data;
 }
 
 void SensorsConnection::setMagnetometerData(const QtMobility::QMagnetometerReadingData &data)
 {
-    *qtMagnetometerData() = data;
+    qtMagnetometerData = data;
 }
 
 void SensorsConnection::setCompassData(const QtMobility::QCompassReadingData &data)
 {
-    *qtCompassData() = data;
+    qtCompassData = data;
 }
 
 void SensorsConnection::setProximityData(const QtMobility::QProximityReadingData &data)
 {
-    *qtProximityData() = data;
+    qtProximityData = data;
 }
 
 void SensorsConnection::setIRProximityData(const QtMobility::QIRProximityReadingData &data)
 {
-    *qtIRProximityData() = data;
+    qtIRProximityData = data;
 }
 
 void SensorsConnection::initialSensorsDataSent()
@@ -192,11 +193,17 @@ SimulatorCommon::SimulatorCommon(QSensor *sensor)
 {
     addDataRate(1, 100);
     sensor->setDataRate(20);
-    (void)sensorsConnection(); // Ensure this exists
+    (void)SensorsConnection::instance(); // Ensure this exists
 }
 
 void SimulatorCommon::start()
 {
+    SensorsConnection *connection = SensorsConnection::instance();
+    if (!connection) {
+        sensorStopped();
+        return;
+    }
+
     if (m_timerid)
         return;
 
@@ -221,43 +228,13 @@ void SimulatorCommon::stop()
 
 void SimulatorCommon::timerEvent(QTimerEvent * /*event*/)
 {
-    if (!sensorsConnection()->safe()) return; // wait until it's safe to read the data
+    SensorsConnection *connection = SensorsConnection::instance();
+    if (!connection) {
+        stop();
+        sensorStopped();
+    }
+    if (!connection->safe()) return; // wait until it's safe to read the data
     poll();
 }
 
-QtMobility::QAccelerometerReadingData get_qtAccelerometerData()
-{
-    return *qtAccelerometerData();
-}
-
-QtMobility::QMagnetometerReadingData get_qtMagnetometerData()
-{
-    return *qtMagnetometerData();
-}
-
-QtMobility::QAmbientLightReadingData get_qtAmbientLightData()
-{
-    return *qtAmbientLightData();
-}
-
-QtMobility::QLightReadingData get_qtLightData()
-{
-    return *qtLightData();
-}
-
-QtMobility::QCompassReadingData get_qtCompassData()
-{
-    return *qtCompassData();
-}
-
-QtMobility::QProximityReadingData get_qtProximityData()
-{
-    return *qtProximityData();
-}
-
-QtMobility::QIRProximityReadingData get_qtIRProximityData()
-{
-    return *qtIRProximityData();
-}
-
 #include "simulatorcommon.moc"
diff --git a/src/plugins/sensors/simulator/simulatorcommon.h b/src/plugins/sensors/simulator/simulatorcommon.h
index 21cacc0..6555f1f 100644
--- a/src/plugins/sensors/simulator/simulatorcommon.h
+++ b/src/plugins/sensors/simulator/simulatorcommon.h
@@ -56,6 +56,7 @@ public:
     explicit SensorsConnection(QObject *parent = 0);
     virtual ~SensorsConnection();
 
+    static SensorsConnection *instance();
     bool safe() const { return mInitialDataSent; }
 
 public slots:
@@ -71,6 +72,15 @@ public slots:
 private:
     SimulatorAsyncConnection *mConnection;
     bool mInitialDataSent;
+
+public:
+    QtMobility::QAmbientLightReadingData qtAmbientLightData;
+    QtMobility::QLightReadingData qtLightData;
+    QtMobility::QAccelerometerReadingData qtAccelerometerData;
+    QtMobility::QMagnetometerReadingData qtMagnetometerData;
+    QtMobility::QCompassReadingData qtCompassData;
+    QtMobility::QProximityReadingData qtProximityData;
+    QtMobility::QIRProximityReadingData qtIRProximityData;
 };
 
 class SimulatorCommon : public QSensorBackend
@@ -87,13 +97,5 @@ private:
     int m_timerid;
 };
 
-QtMobility::QAccelerometerReadingData get_qtAccelerometerData();
-QtMobility::QMagnetometerReadingData get_qtMagnetometerData();
-QtMobility::QAmbientLightReadingData get_qtAmbientLightData();
-QtMobility::QLightReadingData get_qtLightData();
-QtMobility::QCompassReadingData get_qtCompassData();
-QtMobility::QProximityReadingData get_qtProximityData();
-QtMobility::QIRProximityReadingData get_qtIRProximityData();
-
 #endif
 
diff --git a/src/plugins/sensors/simulator/simulatorcompass.cpp b/src/plugins/sensors/simulator/simulatorcompass.cpp
index 37bf0dc..032eb37 100644
--- a/src/plugins/sensors/simulator/simulatorcompass.cpp
+++ b/src/plugins/sensors/simulator/simulatorcompass.cpp
@@ -53,7 +53,7 @@ SimulatorCompass::SimulatorCompass(QSensor *sensor)
 
 void SimulatorCompass::poll()
 {
-    QtMobility::QCompassReadingData data = get_qtCompassData();
+    QtMobility::QCompassReadingData data = SensorsConnection::instance()->qtCompassData;
     quint64 newTimestamp;
     if (!data.timestamp.isValid())
         newTimestamp = QDateTime::currentDateTime().toTime_t();
diff --git a/src/plugins/sensors/simulator/simulatorirproximitysensor.cpp b/src/plugins/sensors/simulator/simulatorirproximitysensor.cpp
index 0590ad9..3198b77 100644
--- a/src/plugins/sensors/simulator/simulatorirproximitysensor.cpp
+++ b/src/plugins/sensors/simulator/simulatorirproximitysensor.cpp
@@ -53,7 +53,7 @@ SimulatorIRProximitySensor::SimulatorIRProximitySensor(QSensor *sensor)
 
 void SimulatorIRProximitySensor::poll()
 {
-    QtMobility::QIRProximityReadingData data = get_qtIRProximityData();
+    QtMobility::QIRProximityReadingData data = SensorsConnection::instance()->qtIRProximityData;
     quint64 newTimestamp;
     if (!data.timestamp.isValid())
         newTimestamp = QDateTime::currentDateTime().toTime_t();
diff --git a/src/plugins/sensors/simulator/simulatorlightsensor.cpp b/src/plugins/sensors/simulator/simulatorlightsensor.cpp
index 47d98de..a0c5035 100644
--- a/src/plugins/sensors/simulator/simulatorlightsensor.cpp
+++ b/src/plugins/sensors/simulator/simulatorlightsensor.cpp
@@ -53,7 +53,7 @@ SimulatorLightSensor::SimulatorLightSensor(QSensor *sensor)
 
 void SimulatorLightSensor::poll()
 {
-    QtMobility::QLightReadingData data = get_qtLightData();
+    QtMobility::QLightReadingData data = SensorsConnection::instance()->qtLightData;
     quint64 newTimestamp;
     if (!data.timestamp.isValid())
         newTimestamp = QDateTime::currentDateTime().toTime_t();
diff --git a/src/plugins/sensors/simulator/simulatormagnetometer.cpp b/src/plugins/sensors/simulator/simulatormagnetometer.cpp
index bafb2fc..cd6ce53 100644
--- a/src/plugins/sensors/simulator/simulatormagnetometer.cpp
+++ b/src/plugins/sensors/simulator/simulatormagnetometer.cpp
@@ -53,7 +53,7 @@ SimulatorMagnetometer::SimulatorMagnetometer(QSensor *sensor)
 
 void SimulatorMagnetometer::poll()
 {
-    QtMobility::QMagnetometerReadingData data = get_qtMagnetometerData();
+    QtMobility::QMagnetometerReadingData data = SensorsConnection::instance()->qtMagnetometerData;
     quint64 newTimestamp;
     if (!data.timestamp.isValid())
         newTimestamp = QDateTime::currentDateTime().toTime_t();
diff --git a/src/plugins/sensors/simulator/simulatorproximitysensor.cpp b/src/plugins/sensors/simulator/simulatorproximitysensor.cpp
index 5926dd7..44977ab 100644
--- a/src/plugins/sensors/simulator/simulatorproximitysensor.cpp
+++ b/src/plugins/sensors/simulator/simulatorproximitysensor.cpp
@@ -53,7 +53,7 @@ SimulatorProximitySensor::SimulatorProximitySensor(QSensor *sensor)
 
 void SimulatorProximitySensor::poll()
 {
-    QtMobility::QProximityReadingData data = get_qtProximityData();
+    QtMobility::QProximityReadingData data = SensorsConnection::instance()->qtProximityData;
     quint64 newTimestamp;
     if (!data.timestamp.isValid())
         newTimestamp = QDateTime::currentDateTime().toTime_t();