WIP SharedArrayBuffer implementation

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 825 matching lines @@
 TYPE_CHECKER(Foreign, FOREIGN_TYPE)
 
 
 bool Object::IsBoolean() const {
   return IsOddball() &&
       ((Oddball::cast(this)->kind() & Oddball::kNotBooleanMask) == 0);
 }
 
 
 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)
 
 
 bool Object::IsJSArrayBufferView() const {
   return IsJSDataView() || IsJSTypedArray();
 }
 
 
 TYPE_CHECKER(JSRegExp, JS_REGEXP_TYPE)
 
@@ skipping 1090 matching lines @@
       return JSBuiltinsObject::kSize;
     case JS_FUNCTION_TYPE:
       return JSFunction::kSize;
     case JS_VALUE_TYPE:
       return JSValue::kSize;
     case JS_DATE_TYPE:
       return JSDate::kSize;
     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;
     case JS_SET_TYPE:
       return JSSet::kSize;
     case JS_MAP_TYPE:
       return JSMap::kSize;
     case JS_SET_ITERATOR_TYPE:
       return JSSetIterator::kSize;
     case JS_MAP_ITERATOR_TYPE:
@@ skipping 4490 matching lines @@
 bool JSArrayBuffer::was_neutered() {
   return BooleanBit::get(flag(), kWasNeuteredBit);
 }
 
 
 void JSArrayBuffer::set_was_neutered(bool value) {
   set_flag(BooleanBit::set(flag(), kWasNeuteredBit, value));
 }
 
 
+SharedFlag JSArrayBuffer::is_shared() {
+  return map()->instance_type() == JS_SHARED_ARRAY_BUFFER_TYPE ? SHARED
+                                                               : NOT_SHARED;
+}
+
+
 ACCESSORS(JSArrayBuffer, weak_next, Object, kWeakNextOffset)
 
 
 Object* JSArrayBufferView::byte_offset() const {
   if (WasNeutered()) return Smi::FromInt(0);
   return Object::cast(READ_FIELD(this, kByteOffsetOffset));
 }
 
 
 void JSArrayBufferView::set_byte_offset(Object* value, WriteBarrierMode mode) {
@@ skipping 36 matching lines @@
   WRITE_FIELD(this, kLengthOffset, value);
   CONDITIONAL_WRITE_BARRIER(GetHeap(), this, kLengthOffset, value, mode);
 }
 
 
 #ifdef VERIFY_HEAP
 ACCESSORS(JSTypedArray, raw_length, Object, kLengthOffset)
 #endif
 
 
+SharedFlag JSTypedArray::is_shared() const {
+  return map()->instance_type() == JS_SHARED_TYPED_ARRAY_TYPE ? SHARED
+                                                              : NOT_SHARED;
+}
+
+
 ACCESSORS(JSRegExp, data, Object, kDataOffset)
 
 
 JSRegExp::Type JSRegExp::TypeTag() {
   Object* data = this->data();
   if (data->IsUndefined()) return JSRegExp::NOT_COMPILED;
   Smi* smi = Smi::cast(FixedArray::cast(data)->get(kTagIndex));
   return static_cast<JSRegExp::Type>(smi->value());
 }
 
@@ skipping 1067 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_