Count the number measure callback invocations

Summary: Counts how many times measure callbacks have been invoked during a layout pass. This is made available via the marker and event APIs.

Reviewed By: SidharthGuglani

Differential Revision: D15836983

fbshipit-source-id: 3835bef94e497375821c9f2ad8209447b4f11518

yoga/YGMarker.h

@@ -25,6 +25,7 @@ typedef struct {
   int maxMeasureCache;
   int cachedLayouts;
   int cachedMeasures;
+  int measureCallbacks;
 } YGMarkerLayoutData;
 
 typedef struct {

yoga/Yoga.cpp

@@ -1581,6 +1581,7 @@ static void YGNodeWithMeasureFuncSetMeasuredDimensions(
     const YGMeasureMode heightMeasureMode,
     const float ownerWidth,
     const float ownerHeight,
+    YGMarkerLayoutData& layoutMarkerData,
     void* const layoutContext) {
   YGAssertWithNode(
       node,
@@ -1634,6 +1635,7 @@ static void YGNodeWithMeasureFuncSetMeasuredDimensions(
         innerHeight,
         heightMeasureMode,
         layoutContext);
+    layoutMarkerData.measureCallbacks += 1;
 
 #ifdef YG_ENABLE_EVENTS
     Event::publish<Event::NodeMeasure>(
@@ -2700,6 +2702,7 @@ static void YGNodelayoutImpl(
         heightMeasureMode,
         ownerWidth,
         ownerHeight,
+        layoutMarkerData,
         layoutContext);
     return;
   }
@@ -4101,13 +4104,13 @@ void YGNodeCalculateLayoutWithContext(
 #endif
   }
 
+#ifdef YG_ENABLE_EVENTS
+  Event::publish<Event::LayoutPassEnd>(node, {layoutContext, &marker->data});
+#endif
+
   // end marker here
   marker = nullptr;
 
-#ifdef YG_ENABLE_EVENTS
-  Event::publish<Event::LayoutPassEnd>(node, {layoutContext});
-#endif
-
   // We want to get rid off `useLegacyStretchBehaviour` from YGConfig. But we
   // aren't sure whether client's of yoga have gotten rid off this flag or not.
   // So logging this in YGLayout would help to find out the call sites depending

yoga/event/event.h

@@ -9,6 +9,7 @@
 #include <functional>
 #include <vector>
 #include "../YGEnums.h"
+#include "../YGMarker.h"
 
 struct YGConfig;
 struct YGNode;
@@ -81,6 +82,7 @@ struct Event::TypedData<Event::LayoutPassStart> {
 template <>
 struct Event::TypedData<Event::LayoutPassEnd> {
   void* layoutContext;
+  YGMarkerLayoutData* layoutData;
 };
 
 template <>