WIP SharedArrayBuffer implementation

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 8d45d12b5457691dac0a49a4708bc9c91f852430..4590d73a0d60720b8bb483f1c3b9419e1f6a57b9 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -843,8 +843,24 @@ bool Object::IsBoolean() const {
 
 
 TYPE_CHECKER(JSArray, JS_ARRAY_TYPE)
-TYPE_CHECKER(JSArrayBuffer, JS_ARRAY_BUFFER_TYPE)
-TYPE_CHECKER(JSTypedArray, JS_TYPED_ARRAY_TYPE)
+
+
+bool Object::IsJSArrayBuffer() const {
+  if (!IsHeapObject()) return false;
+
+  InstanceType type = HeapObject::cast(this)->map()->instance_type();
+  return type == JS_ARRAY_BUFFER_TYPE || type == JS_SHARED_ARRAY_BUFFER_TYPE;
+}
+
+
+bool Object::IsJSTypedArray() const {
+  if (!IsHeapObject()) return false;
+
+  InstanceType type = HeapObject::cast(this)->map()->instance_type();
+  return type == JS_TYPED_ARRAY_TYPE || type == JS_SHARED_TYPED_ARRAY_TYPE;
+}
+
+
 TYPE_CHECKER(JSDataView, JS_DATA_VIEW_TYPE)
 
 
@@ -1965,8 +1981,10 @@ int JSObject::GetHeaderSize() {
     case JS_ARRAY_TYPE:
       return JSArray::kSize;
     case JS_ARRAY_BUFFER_TYPE:
+    case JS_SHARED_ARRAY_BUFFER_TYPE:
       return JSArrayBuffer::kSize;
     case JS_TYPED_ARRAY_TYPE:
+    case JS_SHARED_TYPED_ARRAY_TYPE:
       return JSTypedArray::kSize;
     case JS_DATA_VIEW_TYPE:
       return JSDataView::kSize;
@@ -6463,6 +6481,16 @@ void JSArrayBuffer::set_is_neuterable(bool value) {
 }
 
 
+bool JSArrayBuffer::is_shared() {
+  return BooleanBit::get(flag(), kIsSharedBit);
+}
+
+
+void JSArrayBuffer::set_is_shared(bool value) {
+  set_flag(BooleanBit::set(flag(), kIsSharedBit, value));
+}
+
+
 ACCESSORS(JSArrayBuffer, weak_next, Object, kWeakNextOffset)
 ACCESSORS(JSArrayBuffer, weak_first_view, Object, kWeakFirstViewOffset)
 
@@ -6473,6 +6501,17 @@ ACCESSORS(JSArrayBufferView, byte_length, Object, kByteLengthOffset)
 ACCESSORS(JSArrayBufferView, weak_next, Object, kWeakNextOffset)
 ACCESSORS(JSTypedArray, length, Object, kLengthOffset)
 
+
+bool JSTypedArray::is_shared() const {
+  return Smi::cast(READ_FIELD(this, kIsSharedOffset))->value() != 0;
+}
+
+
+void JSTypedArray::set_is_shared(bool value) {
+  WRITE_FIELD(this, kIsSharedOffset, Smi::FromInt(value));
+}
+
+
 ACCESSORS(JSRegExp, data, Object, kDataOffset)