Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/Headers/VROFrameTimer.h

@@ -0,0 +1,70 @@
+//
+//  VROFrameTimer.h
+//  ViroRenderer
+//
+//  Created by Raj Advani on 4/5/17.
+//  Copyright © 2017 Viro Media. All rights reserved.
+//
+
+#ifndef VROFrameTimer_h
+#define VROFrameTimer_h
+
+#include "VROTime.h"
+
+/*
+ Startup frames have unlimited processing time; process-only
+ frames are frames in which we only process and do not render.
+ */
+enum class VROFrameType {
+    Normal,
+    Startup,
+    ProcessOnly
+};
+
+/*
+ Tracks how much time remains in the current frame for processing
+ tasks.
+ */
+class VROFrameTimer {
+    
+public:
+    
+    VROFrameTimer(VROFrameType frameType, double timeForProcessing, double lastFrameEndTime) :
+        _frameType(frameType),
+        _timeForProcessing(timeForProcessing),
+        _lastFrameEndTime(lastFrameEndTime) {
+    }
+    
+    /*
+     Returns true if there is time remaining for any processing operations in the
+     current frame.
+     */
+    bool isTimeRemainingInFrame() const {
+        return _frameType == VROFrameType::Startup || getTimeRemainingInFrame() > 0;
+    }
+    
+    double getTimeRemainingInFrame() const {
+        return _timeForProcessing - (VROTimeCurrentMillis() - _lastFrameEndTime);
+    }
+    
+private:
+    
+    /*
+     The frame 'type'. Startup frames have unlimited processing time; process-only
+     frames are frames in which we only process() and do not render().
+     */
+    const VROFrameType _frameType;
+    
+    /*
+     The time available for processing this frame, in ms.
+     */
+    const double _timeForProcessing;
+    
+    /*
+     The end time of the last frame, in ms.
+     */
+    const double _lastFrameEndTime;
+    
+};
+
+#endif /* VROFrameTimer_h */