Add Unsafe based storage backend

Summary:
@public

Adds another version of property storage for `YogaNode`, using `sun.misc.Unsafe`.

Adopts the stub concept from Litho for `Unsafe`, as it is hidden by the Android SDK.

Reviewed By: pasqualeanatriello

Differential Revision: D9140103

fbshipit-source-id: a4b376eca341b724a00f873467ae8bf8eaac69f4

java/BUCK

@@ -29,9 +29,19 @@ yoga_cxx_library(
     ],
 )
 
+yoga_java_library(
+    name = "stubs",
+    srcs = glob(["stubs/**/*.java"]),
+    source = "1.7",
+    target = "1.7",
+)
+
 yoga_java_library(
     name = "java",
     srcs = glob(["com/facebook/yoga/*.java"]),
+    provided_deps = [
+        ":stubs",
+    ],
     required_for_source_only_abi = True,
     source = "1.7",
     target = "1.7",

java/build.gradle

@@ -52,6 +52,7 @@ android {
 dependencies {
     compileOnly 'com.google.code.findbugs:jsr305:3.0.1'
     compileOnly project(':yoga:proguard-annotations')
+    compileOnly project(':yoga:stubs')
     implementation 'com.facebook.soloader:soloader:0.5.1'
     testImplementation 'junit:junit:4.12'
 }

java/com/facebook/yoga/YogaNode.java

@@ -23,6 +23,7 @@ public class YogaNode implements Cloneable {
 
   public static final int BYTE_BUFFER = 1;
   public static final int HYBRID = 2;
+  public static final int UNSAFE = 3;
 
   /** Get native instance count. Useful for testing only. */
   static native int jni_YGNodeGetInstanceCount();
@@ -50,6 +51,9 @@ public class YogaNode implements Cloneable {
       case HYBRID:
         mDelegate = new YogaNodePropertiesHybrid(this);
         break;
+      case UNSAFE:
+        mDelegate = new YogaNodePropertiesUnsafe(this);
+        break;
       default:
         mDelegate = new YogaNodePropertiesJNI(this);
     }
@@ -63,6 +67,9 @@ public class YogaNode implements Cloneable {
       case HYBRID:
         mDelegate = new YogaNodePropertiesHybrid(this, config);
         break;
+      case UNSAFE:
+        mDelegate = new YogaNodePropertiesUnsafe(this, config);
+        break;
       default:
         mDelegate = new YogaNodePropertiesJNI(this, config);
     }

java/com/facebook/yoga/YogaNodePropertiesByteBuffer.java

@@ -31,16 +31,16 @@ public class YogaNodePropertiesByteBuffer implements YogaNodeProperties, Cloneab
 
   private static native ByteBuffer jni_getLayoutBuffer(long nativePointer);
 
-  private static native long jni_YGNodeNewByteBuffer(YogaNode node);
+  private static native long jni_YGNodeNewNoProps(YogaNode node);
 
   public YogaNodePropertiesByteBuffer(YogaNode node) {
-    this(jni_YGNodeNewByteBuffer(node));
+    this(jni_YGNodeNewNoProps(node));
   }
 
-  private static native long jni_YGNodeNewByteBufferWithConfig(YogaNode node, long configPointer);
+  private static native long jni_YGNodeNewNoPropsWithConfig(YogaNode node, long configPointer);
 
   public YogaNodePropertiesByteBuffer(YogaNode node, YogaConfig config) {
-    this(jni_YGNodeNewByteBufferWithConfig(node, config.mNativePointer));
+    this(jni_YGNodeNewNoPropsWithConfig(node, config.mNativePointer));
   }
 
   public YogaNodePropertiesByteBuffer(long nativePointer) {
@@ -84,6 +84,7 @@ public class YogaNodePropertiesByteBuffer implements YogaNodeProperties, Cloneab
   @Override
   public void reset() {
     mHasBorderSet = false;
+    mHasNewLayout = true;
     jni_YGNodeReset(getNativePointer());
   }
 

java/com/facebook/yoga/YogaNodePropertiesUnsafe.java

@@ -0,0 +1,580 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+package com.facebook.yoga;
+
+import com.facebook.proguard.annotations.DoNotStrip;
+import com.facebook.soloader.SoLoader;
+import java.lang.reflect.Field;
+import sun.misc.Unsafe;
+
+@DoNotStrip
+public class YogaNodePropertiesUnsafe implements YogaNodeProperties {
+
+  private static final int TRUE_BITS = 0x01000001;
+  private static final int FLOAT_SIZE = 4;
+  private static final int AUTO = YogaUnit.AUTO.intValue();
+  private static final int POINT = YogaUnit.POINT.intValue();
+  private static final int PERCENT = YogaUnit.PERCENT.intValue();
+  private static final int UNDEFINED = YogaUnit.UNDEFINED.intValue();
+  private static final int RTL = YogaDirection.RTL.intValue();
+  private static final Unsafe UNSAFE;
+
+  private final long mNativePointer;
+  private final long mStyleNativePointer;
+  private final long mLayoutNativePointer;
+  private boolean mHasBorderSet = false;
+  private boolean mHasNewLayout = true;
+  private boolean mIsFreed = false;
+
+  static {
+    SoLoader.loadLibrary("yoga");
+    Field instanceField = null;
+    try {
+      instanceField = Unsafe.class.getDeclaredField("theUnsafe");
+    } catch (NoSuchFieldException e) {
+      throw new RuntimeException(e);
+    }
+    instanceField.setAccessible(true);
+    try {
+      UNSAFE = (Unsafe) instanceField.get(null);
+    } catch (IllegalAccessException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  private static native long jni_YGNodeNewNoProps(YogaNode node);
+  private static native long jni_YGNodeNewNoPropsWithConfig(YogaNode node, long configPointer);
+  private static native long jni_YGNodeStylePointer(long nativePointer);
+  private static native long jni_YGNodeLayoutPointer(long nativePointer);
+
+  public YogaNodePropertiesUnsafe(YogaNode node) {
+    this(jni_YGNodeNewNoProps(node));
+  }
+
+  public YogaNodePropertiesUnsafe(YogaNode node, YogaConfig config) {
+    this(jni_YGNodeNewNoPropsWithConfig(node, config.mNativePointer));
+  }
+
+  public YogaNodePropertiesUnsafe(long nativePointer) {
+    mNativePointer = nativePointer;
+    mStyleNativePointer = jni_YGNodeStylePointer(nativePointer);
+    mLayoutNativePointer = jni_YGNodeLayoutPointer(nativePointer);
+  }
+
+  private static native long jni_YGNodeCloneNoProps(long nativePointer, YogaNode newNode);
+
+  @Override
+  public YogaNodeProperties clone(YogaNode node) {
+    long clonedNativePointer = jni_YGNodeCloneNoProps(getNativePointer(), node);
+    YogaNodePropertiesUnsafe clone =
+      new YogaNodePropertiesUnsafe(clonedNativePointer);
+    clone.mHasBorderSet = mHasBorderSet;
+    clone.mHasNewLayout = mHasNewLayout;
+    return clone;
+  }
+
+  @Override
+  public long getNativePointer() {
+    return mNativePointer;
+  }
+
+  @Override
+  public void onAfterCalculateLayout(boolean hasNewLayout) {
+    mHasNewLayout = hasNewLayout;
+  }
+
+  private static native void jni_YGNodeReset(long nativePointer);
+
+  @Override
+  public void reset() {
+    mHasNewLayout = true;
+    jni_YGNodeReset(getNativePointer());
+  }
+
+  @Override
+  public boolean hasNewLayout() {
+    return mHasNewLayout;
+  }
+
+  private static native boolean jni_YGNodeIsDirty(long nativePointer);
+
+  @Override
+  public boolean isDirty() {
+    return jni_YGNodeIsDirty(mNativePointer);
+  }
+
+  @Override
+  public void markLayoutSeen() {
+    mHasNewLayout = false;
+  }
+
+  @Override
+  public YogaDirection getStyleDirection() {
+    return YogaDirection.fromInt(getStyleInt(YogaNodeMemoryLayout.styleDirection));
+  }
+
+  @Override
+  public void setDirection(YogaDirection direction) {
+    putStyleInt(YogaNodeMemoryLayout.styleDirection, direction.intValue());
+  }
+
+  @Override
+  public YogaFlexDirection getFlexDirection() {
+    return YogaFlexDirection.fromInt(getStyleInt(YogaNodeMemoryLayout.styleFlexDirection));
+  }
+
+  @Override
+  public void setFlexDirection(YogaFlexDirection flexDirection) {
+    putStyleInt(YogaNodeMemoryLayout.styleFlexDirection, flexDirection.intValue());
+  }
+
+  @Override
+  public YogaJustify getJustifyContent() {
+    return YogaJustify.fromInt(getStyleInt(YogaNodeMemoryLayout.styleJustifyContent));
+  }
+
+  @Override
+  public void setJustifyContent(YogaJustify justifyContent) {
+    putStyleInt(YogaNodeMemoryLayout.styleJustifyContent, justifyContent.intValue());
+  }
+
+  @Override
+  public YogaAlign getAlignItems() {
+    return YogaAlign.fromInt(getStyleInt(YogaNodeMemoryLayout.styleAlignItems));
+  }
+
+  @Override
+  public void setAlignItems(YogaAlign alignItems) {
+    putStyleInt(YogaNodeMemoryLayout.styleAlignItems, alignItems.intValue());
+  }
+
+  @Override
+  public YogaAlign getAlignSelf() {
+    return YogaAlign.fromInt(getStyleInt(YogaNodeMemoryLayout.styleAlignSelf));
+  }
+
+  @Override
+  public void setAlignSelf(YogaAlign alignSelf) {
+    putStyleInt(YogaNodeMemoryLayout.styleAlignSelf, alignSelf.intValue());
+  }
+
+  @Override
+  public YogaAlign getAlignContent() {
+    return YogaAlign.fromInt(getStyleInt(YogaNodeMemoryLayout.styleAlignContent));
+  }
+
+  @Override
+  public void setAlignContent(YogaAlign alignContent) {
+    putStyleInt(YogaNodeMemoryLayout.styleAlignContent, alignContent.intValue());
+  }
+
+  @Override
+  public YogaPositionType getPositionType() {
+    return YogaPositionType.fromInt(getStyleInt(YogaNodeMemoryLayout.stylePositionType));
+  }
+
+  @Override
+  public void setPositionType(YogaPositionType positionType) {
+    putStyleInt(YogaNodeMemoryLayout.stylePositionType, positionType.intValue());
+  }
+
+  @Override
+  public void setWrap(YogaWrap flexWrap) {
+    putStyleInt(YogaNodeMemoryLayout.styleFlexWrap, flexWrap.intValue());
+  }
+
+  @Override
+  public YogaOverflow getOverflow() {
+    return YogaOverflow.fromInt(getStyleInt(YogaNodeMemoryLayout.styleOverflow));
+  }
+
+  @Override
+  public void setOverflow(YogaOverflow overflow) {
+    putStyleInt(YogaNodeMemoryLayout.styleOverflow, overflow.intValue());
+  }
+
+  @Override
+  public YogaDisplay getDisplay() {
+    return YogaDisplay.fromInt(getStyleInt(YogaNodeMemoryLayout.styleDisplay));
+  }
+
+  @Override
+  public void setDisplay(YogaDisplay display) {
+    putStyleInt(YogaNodeMemoryLayout.styleDisplay, display.intValue());
+  }
+
+  @Override
+  public void setFlex(float flex) {
+    putStyleOptional(YogaNodeMemoryLayout.styleFlex, flex);
+  }
+
+  @Override
+  public float getFlexGrow() {
+    return getStyleFloat(YogaNodeMemoryLayout.styleFlexGrow);
+  }
+
+  @Override
+  public void setFlexGrow(float flexGrow) {
+    putStyleOptional(YogaNodeMemoryLayout.styleFlexGrow, flexGrow);
+  }
+
+  @Override
+  public float getFlexShrink() {
+    return getStyleFloat(YogaNodeMemoryLayout.styleFlexShrink);
+  }
+
+  @Override
+  public void setFlexShrink(float flexShrink) {
+    putStyleOptional(YogaNodeMemoryLayout.styleFlexShrink, flexShrink);
+  }
+
+  @Override
+  public YogaValue getFlexBasis() {
+    return getStyleValue(YogaNodeMemoryLayout.styleFlexBasis);
+  }
+
+  @Override
+  public void setFlexBasis(float flexBasis) {
+    putStylePoints(YogaNodeMemoryLayout.styleFlexBasis, flexBasis);
+  }
+
+  @Override
+  public void setFlexBasisPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleFlexBasis, percent);
+  }
+
+  @Override
+  public void setFlexBasisAuto() {
+    putStyleAuto(YogaNodeMemoryLayout.styleFlexBasis);
+  }
+
+  @Override
+  public YogaValue getMargin(YogaEdge edge) {
+    return getStyleValue(YogaNodeMemoryLayout.styleMarginOffset(edge));
+  }
+
+  @Override
+  public void setMargin(YogaEdge edge, float margin) {
+    putStylePoints(YogaNodeMemoryLayout.styleMarginOffset(edge), margin);
+  }
+
+  @Override
+  public void setMarginPercent(YogaEdge edge, float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleMarginOffset(edge), percent);
+  }
+
+  @Override
+  public void setMarginAuto(YogaEdge edge) {
+    putStyleAuto(YogaNodeMemoryLayout.styleMarginOffset(edge));
+  }
+
+  @Override
+  public YogaValue getPadding(YogaEdge edge) {
+    return getStyleValue(YogaNodeMemoryLayout.stylePaddingOffset(edge));
+  }
+
+  @Override
+  public void setPadding(YogaEdge edge, float padding) {
+    putStylePoints(YogaNodeMemoryLayout.stylePaddingOffset(edge), padding);
+  }
+
+  @Override
+  public void setPaddingPercent(YogaEdge edge, float percent) {
+    putStylePercent(YogaNodeMemoryLayout.stylePaddingOffset(edge), percent);
+  }
+
+  @Override
+  public float getBorder(YogaEdge edge) {
+    return mHasBorderSet
+      ? getStyleFloat(YogaNodeMemoryLayout.styleBorderOffset(edge))
+      : YogaConstants.UNDEFINED;
+  }
+
+  @Override
+  public void setBorder(YogaEdge edge, float border) {
+    mHasBorderSet = true;
+    putStylePoints(YogaNodeMemoryLayout.styleBorderOffset(edge), border);
+  }
+
+  @Override
+  public YogaValue getPosition(YogaEdge edge) {
+    return getStyleValue(YogaNodeMemoryLayout.stylePositionOffset(edge));
+  }
+
+  @Override
+  public void setPosition(YogaEdge edge, float position) {
+    putStylePoints(YogaNodeMemoryLayout.stylePositionOffset(edge), position);
+  }
+
+  @Override
+  public void setPositionPercent(YogaEdge edge, float percent) {
+    putStylePercent(YogaNodeMemoryLayout.stylePositionOffset(edge), percent);
+  }
+
+  @Override
+  public YogaValue getWidth() {
+    return getStyleValue(YogaNodeMemoryLayout.styleWidth);
+  }
+
+  @Override
+  public void setWidth(float width) {
+    putStylePoints(YogaNodeMemoryLayout.styleWidth, width);
+  }
+
+  @Override
+  public void setWidthPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleWidth, percent);
+  }
+
+  @Override
+  public void setWidthAuto() {
+    putStyleAuto(YogaNodeMemoryLayout.styleWidth);
+  }
+
+  @Override
+  public YogaValue getHeight() {
+    return getStyleValue(YogaNodeMemoryLayout.styleHeight);
+  }
+
+  @Override
+  public void setHeight(float height) {
+    putStylePoints(YogaNodeMemoryLayout.styleHeight, height);
+  }
+
+  @Override
+  public void setHeightPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleHeight, percent);
+  }
+
+  @Override
+  public void setHeightAuto() {
+    putStyleAuto(YogaNodeMemoryLayout.styleHeight);
+  }
+
+  @Override
+  public YogaValue getMinWidth() {
+    return getStyleValue(YogaNodeMemoryLayout.styleMinWidth);
+  }
+
+  @Override
+  public void setMinWidth(float minWidth) {
+    putStylePoints(YogaNodeMemoryLayout.styleMinWidth, minWidth);
+  }
+
+  @Override
+  public void setMinWidthPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleMinWidth, percent);
+  }
+
+  @Override
+  public YogaValue getMinHeight() {
+    return getStyleValue(YogaNodeMemoryLayout.styleMinHeight);
+  }
+
+  @Override
+  public void setMinHeight(float minHeight) {
+    putStylePoints(YogaNodeMemoryLayout.styleMinHeight, minHeight);
+  }
+
+  @Override
+  public void setMinHeightPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleMinHeight, percent);
+  }
+
+  @Override
+  public YogaValue getMaxWidth() {
+    return getStyleValue(YogaNodeMemoryLayout.styleMaxWidth);
+  }
+
+  @Override
+  public void setMaxWidth(float maxWidth) {
+    putStylePoints(YogaNodeMemoryLayout.styleMaxWidth, maxWidth);
+  }
+
+  @Override
+  public void setMaxWidthPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleMaxWidth, percent);
+  }
+
+  @Override
+  public YogaValue getMaxHeight() {
+    return getStyleValue(YogaNodeMemoryLayout.styleMaxHeight);
+  }
+
+  @Override
+  public void setMaxHeight(float maxHeight) {
+    putStylePoints(YogaNodeMemoryLayout.styleMaxHeight, maxHeight);
+  }
+
+  @Override
+  public void setMaxHeightPercent(float percent) {
+    putStylePercent(YogaNodeMemoryLayout.styleMaxHeight, percent);
+  }
+
+  @Override
+  public float getAspectRatio() {
+    return getStyleOptional(YogaNodeMemoryLayout.styleAspectRatio);
+  }
+
+  @Override
+  public void setAspectRatio(float aspectRatio) {
+    putStyleOptional(YogaNodeMemoryLayout.styleAspectRatio, aspectRatio);
+  }
+
+  @Override
+  public float getLayoutX() {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutX);
+  }
+
+  @Override
+  public float getLayoutY() {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutY);
+  }
+
+  @Override
+  public float getLayoutWidth() {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutWidth);
+  }
+
+  @Override
+  public float getLayoutHeight() {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutHeight);
+  }
+
+  @Override
+  public boolean getDoesLegacyStretchFlagAffectsLayout() {
+    return getBool(mLayoutNativePointer + YogaNodeMemoryLayout.layoutDoesLegacyStretchFlagAffectsLayout);
+  }
+
+  @Override
+  public float getLayoutMargin(YogaEdge edge) {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutMarginOffset(layoutEdge(edge)));
+  }
+
+  @Override
+  public float getLayoutPadding(YogaEdge edge) {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutPaddingOffset(layoutEdge(edge)));
+  }
+
+  @Override
+  public float getLayoutBorder(YogaEdge edge) {
+    return getLayoutFloat(YogaNodeMemoryLayout.layoutBorderOffset(layoutEdge(edge)));
+  }
+
+  @Override
+  public YogaDirection getLayoutDirection() {
+    return YogaDirection.fromInt(getLayoutDirectionInt());
+  }
+
+  private static native void jni_YGNodeFree(long nativePointer);
+
+  @Override
+  public void freeNatives() {
+    if (!mIsFreed) {
+      mIsFreed = true;
+      jni_YGNodeFree(mNativePointer);
+    }
+  }
+
+  private int getLayoutDirectionInt() {
+    return UNSAFE.getInt(null, mLayoutNativePointer + YogaNodeMemoryLayout.layoutDirection);
+  }
+
+  private YogaEdge layoutEdge(YogaEdge edge) {
+    int layoutDirection = getLayoutDirectionInt();
+    switch (edge) {
+      case LEFT:
+        return layoutDirection == RTL ? YogaEdge.END : YogaEdge.START;
+      case RIGHT:
+        return layoutDirection == RTL ? YogaEdge.START : YogaEdge.END;
+      case TOP:
+      case BOTTOM:
+      case START:
+      case END:
+        return edge;
+      default:
+        throw new IllegalArgumentException("Cannot get layout properties of multi-edge shorthands");
+    }
+  }
+
+  private int getStyleInt(int offset) {
+    return UNSAFE.getInt(null, mStyleNativePointer + offset);
+  }
+
+  private void putStyleInt(int offset, int value) {
+    UNSAFE.putInt(null, mStyleNativePointer + offset, value);
+  }
+
+  private float getStyleFloat(int offset) {
+    return getFloat(mStyleNativePointer + offset);
+  }
+
+  private void putStyleFloat(int offset, float value) {
+    putFloat(mStyleNativePointer + offset, value);
+  }
+
+  private void putStylePoints(int offset, float value) {
+    putStyleValue(offset, value, POINT);
+  }
+
+  private void putStylePercent(int offset, float value) {
+    putStyleValue(offset, value, PERCENT);
+  }
+
+  private void putStyleAuto(int offset) {
+    putStyleValue(offset, 0, AUTO);
+  }
+
+  private void putStyleValue(int offset, float value, int unit) {
+    if (YogaConstants.isUndefined(value)) {
+      value = YogaConstants.UNDEFINED;
+      unit = UNDEFINED;
+    }
+    putStyleFloat(offset, value);
+    putStyleInt(offset + FLOAT_SIZE, unit);
+  }
+
+  private YogaValue getStyleValue(int offset) {
+    float value = getStyleFloat(offset);
+    int unit = getStyleInt(offset + FLOAT_SIZE);
+    return new YogaValue(value, YogaUnit.fromInt(unit));
+  }
+
+  private void putStyleOptional(int offset, float value) {
+    int isUndefinedBits = YogaConstants.isUndefined(value) ? TRUE_BITS : 0;
+    putStyleFloat(offset, value);
+    putStyleInt(offset + FLOAT_SIZE, isUndefinedBits);
+  }
+
+  private float getStyleOptional(int offset) {
+    boolean isUndefined = getBool(mStyleNativePointer + offset + FLOAT_SIZE);
+    return isUndefined
+      ? YogaConstants.UNDEFINED
+      : getStyleFloat(offset);
+  }
+
+  private float getLayoutFloat(int offset) {
+    return getFloat(mLayoutNativePointer + offset);
+  }
+
+  private static float getFloat(long offset) {
+    int intBits = UNSAFE.getInt(null, offset);
+    return Float.intBitsToFloat(intBits);
+  }
+
+  private static void putFloat(long offset, float value) {
+    int intBits = Float.floatToRawIntBits(value);
+    UNSAFE.putInt(null, offset, intBits);
+  }
+
+  private static boolean getBool(long offset) {
+    // assumes little endian
+    return (UNSAFE.getInt(null, offset) & 0xFF) != 0;
+  }
+
+}

java/jni/YGJNI.cpp

@@ -344,13 +344,11 @@ jlong jni_YGNodeNewWithConfig(
   return reinterpret_cast<jlong>(node);
 }
 
-jlong jni_YGNodeNewByteBuffer(
-    alias_ref<jclass>,
-    alias_ref<JYogaNode> javaNode) {
+jlong jni_YGNodeNewNoProps(alias_ref<jclass>, alias_ref<JYogaNode> javaNode) {
   return jni_YGNodeNew(nullptr, javaNode);
 }
 
-jlong jni_YGNodeNewByteBufferWithConfig(
+jlong jni_YGNodeNewNoPropsWithConfig(
     alias_ref<jclass>,
     alias_ref<JYogaNode> javaNode,
     jlong configPointer) {
@@ -747,6 +745,14 @@ local_ref<JByteBuffer> jni_getLayoutBuffer(
       reinterpret_cast<uint8_t*>(layout), sizeof(YGLayout));
 }
 
+jlong jni_YGNodeStylePointer(alias_ref<jclass>, jlong nativePointer) {
+  return reinterpret_cast<jlong>(&_jlong2YGNodeRef(nativePointer)->getStyle());
+}
+
+jlong jni_YGNodeLayoutPointer(alias_ref<jclass>, jlong nativePointer) {
+  return reinterpret_cast<jlong>(&_jlong2YGNodeRef(nativePointer)->getLayout());
+}
+
 #define YGMakeNativeMethod(name) makeNativeMethod(#name, name)
 
 jint JNI_OnLoad(JavaVM* vm, void*) {
@@ -860,8 +866,8 @@ jint JNI_OnLoad(JavaVM* vm, void*) {
         {
             YGMakeNativeMethod(jni_YGNodeCloneNoProps),
             YGMakeNativeMethod(jni_YGNodeFree),
-            YGMakeNativeMethod(jni_YGNodeNewByteBuffer),
-            YGMakeNativeMethod(jni_YGNodeNewByteBufferWithConfig),
+            YGMakeNativeMethod(jni_YGNodeNewNoProps),
+            YGMakeNativeMethod(jni_YGNodeNewNoPropsWithConfig),
             YGMakeNativeMethod(jni_YGNodeReset),
             YGMakeNativeMethod(jni_YGNodeIsDirty),
             YGMakeNativeMethod(jni_getStyleBuffer),
@@ -872,5 +878,17 @@ jint JNI_OnLoad(JavaVM* vm, void*) {
         {
             YGMakeNativeMethod(jni_getStyleBuffer),
         });
+    registerNatives(
+        "com/facebook/yoga/YogaNodePropertiesUnsafe",
+        {
+            YGMakeNativeMethod(jni_YGNodeCloneNoProps),
+            YGMakeNativeMethod(jni_YGNodeFree),
+            YGMakeNativeMethod(jni_YGNodeNewNoProps),
+            YGMakeNativeMethod(jni_YGNodeNewNoPropsWithConfig),
+            YGMakeNativeMethod(jni_YGNodeStylePointer),
+            YGMakeNativeMethod(jni_YGNodeLayoutPointer),
+            YGMakeNativeMethod(jni_YGNodeIsDirty),
+            YGMakeNativeMethod(jni_YGNodeReset),
+        });
   });
 }

java/stubs/build.gradle

@@ -0,0 +1,10 @@
+apply plugin: 'java'
+
+sourceSets {
+    main {
+        java {
+            srcDirs = ['src']
+        }
+    }
+}
+

java/stubs/src/sun/misc/Unsafe.java

@@ -0,0 +1,27 @@
+/*
+ *  Copyright (c) 2018-present, Facebook, Inc.
+ *
+ *  This source code is licensed under the MIT license found in the LICENSE
+ *  file in the root directory of this source tree.
+ *
+ */
+
+package sun.misc;
+
+/**
+ * Stub for sun.misc.Unsafe, which is not exposed by the Android SDK.
+ *
+ * This only contains the methods and fields we need for Yoga.
+ */
+public final class Unsafe {
+  private static final Unsafe theUnsafe = null;
+
+  public final int getInt(Object object, long offset) {
+    throw new RuntimeException("Stub!");
+  }
+
+  public final void putInt(Object object, long offset, int value) {
+    throw new RuntimeException("Stub!");
+  }
+}
+

java/tests/com/facebook/yoga/TestParametrization.java

@@ -59,6 +59,22 @@ public class TestParametrization {
         public String toString() {
           return "Hybrid";
         }
+      },
+      new NodeFactory() {
+        @Override
+        public YogaNode create() {
+          return new YogaNode(YogaNode.UNSAFE);
+        }
+
+        @Override
+        public YogaNode create(YogaConfig config) {
+          return new YogaNode(YogaNode.UNSAFE, config);
+        }
+
+        @Override
+        public String toString() {
+          return "Unsafe";
+        }
       });
   }
 

settings.gradle

@@ -1,5 +1,6 @@
-include ':yoga', ':yogacore', ':yoga-layout', ':yoga:proguard-annotations', ':libfb'
+include ':yoga', ':yogacore', ':yoga-layout', ':yoga:proguard-annotations', ':yoga:stubs', ':libfb'
 project(':yoga').projectDir = file('java')
 project(':yoga:proguard-annotations').projectDir = file('java/proguard-annotations')
+project(':yoga:stubs').projectDir = file('java/stubs')
 project(':yoga-layout').projectDir = file('android')
 project(':libfb').projectDir = file('lib/fb')