1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef ECMASCRIPT_TAGGED_OBJECT_HEADER_H 17 #define ECMASCRIPT_TAGGED_OBJECT_HEADER_H 18 19 #include "ecmascript/mem/mark_word.h" 20 #include "include/object_header.h" 21 22 namespace panda::ecmascript { 23 class JSHClass; 24 template<typename T> 25 class JSHandle; 26 class JSThread; 27 28 class TaggedObject : public ObjectHeader { 29 public: Cast(ObjectHeader * header)30 static TaggedObject *Cast(ObjectHeader *header) 31 { 32 return static_cast<TaggedObject *>(header); 33 } 34 35 void SetClass(JSHandle<JSHClass> hclass); 36 37 void SynchronizedSetClass(JSHClass *hclass); 38 JSHClass *SynchronizedGetClass() const; 39 void SetClassWithoutBarrier(JSHClass *hclass); 40 void SetClass(JSHClass *hclass); 41 JSHClass *GetClass() const; 42 43 // Size of object header TaggedObjectSize()44 static constexpr int TaggedObjectSize() 45 { 46 return sizeof(TaggedObject); 47 } 48 49 JSThread* GetJSThread() const; 50 }; 51 static_assert(TaggedObject::TaggedObjectSize() == sizeof(MarkWordType)); 52 } // namespace panda::ecmascript 53 54 #endif // ECMASCRIPT_TAGGED_OBJECT_HEADER_H 55