QUnifiedTimer: Add callback for timer ticks. Used for profiling

Change-Id: Ia7cf823dee7f0b491db2f041d29cdfc0e385f18e
Reviewed-on: http://codereview.qt-project.org/6253
Reviewed-by: Kai Koehne <kai.koehne@nokia.com>
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/corelib/animation/qabstractanimation.cpp

@@ -168,7 +168,7 @@ Q_GLOBAL_STATIC(QThreadStorage<QUnifiedTimer *>, unifiedTimer)
 QUnifiedTimer::QUnifiedTimer() :
     QObject(), defaultDriver(this), lastTick(0), timingInterval(DEFAULT_TIMER_INTERVAL),
     currentAnimationIdx(0), insideTick(false), consistentTiming(false), slowMode(false),
-    slowdownFactor(5.0f), isPauseTimerActive(false), runningLeafAnimations(0)
+    slowdownFactor(5.0f), isPauseTimerActive(false), runningLeafAnimations(0), profilerCallback(0)
 {
     time.invalidate();
     driver = &defaultDriver;
@@ -234,12 +234,20 @@ void QUnifiedTimer::updateAnimationsTime(qint64 timeStep)
             int elapsed = QAbstractAnimationPrivate::get(animation)->totalCurrentTime
                           + (animation->direction() == QAbstractAnimation::Forward ? delta : -delta);
             animation->setCurrentTime(elapsed);
+
+            if (profilerCallback)
+                profilerCallback(delta);
         }
         insideTick = false;
         currentAnimationIdx = 0;
     }
 }
 
+void QUnifiedTimer::registerProfilerCallback(void (*cb)(qint64))
+{
+    profilerCallback = cb;
+}
+
 void QUnifiedTimer::updateAnimationTimer()
 {
     QUnifiedTimer *inst = QUnifiedTimer::instance(false);

src/corelib/animation/qabstractanimation_p.h

@@ -189,6 +189,7 @@ public:
 
     //useful for profiling/debugging
     int runningAnimationCount() { return animations.count(); }
+    void registerProfilerCallback(void (*cb)(qint64));
 
 protected:
     void timerEvent(QTimerEvent *);
@@ -231,6 +232,8 @@ private:
     void unregisterRunningAnimation(QAbstractAnimation *animation);
 
     int closestPauseAnimationTimeToFinish();
+
+    void (*profilerCallback)(qint64);
 };
 
 QT_END_NAMESPACE