1 /* 2 * Copyright (c) 2021-2024 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_HANDLE_SCOPE_H 17 #define ECMASCRIPT_HANDLE_SCOPE_H 18 19 #include "ecmascript/js_tagged_value.h" 20 21 namespace panda::ecmascript { 22 class JSThread; 23 class EcmaVM; 24 /* 25 * Handles are only valid within a HandleScope. When a handle is created for an object a cell is allocated in the 26 * current HandleScope. 27 */ 28 29 class EcmaHandleScope { 30 public: 31 explicit PUBLIC_API EcmaHandleScope(JSThread *thread); 32 33 PUBLIC_API ~EcmaHandleScope(); 34 static uintptr_t PUBLIC_API NewHandle(JSThread *thread, JSTaggedType value); 35 static uintptr_t PUBLIC_API NewPrimitiveHandle(JSThread *thread, JSTaggedType value); 36 void OpenHandleScope(EcmaVM *vm); 37 void OpenPrimitiveScope(EcmaVM *vm); 38 void CloseHandleScope(EcmaVM *vm); 39 void ClosePrimitiveScope(EcmaVM *vm); 40 GetThread()41 JSThread *GetThread() const 42 { 43 return thread_; 44 } 45 46 private: 47 JSThread *thread_; 48 JSTaggedType *prevNext_; 49 JSTaggedType *prevEnd_; 50 int prevHandleStorageIndex_ {-1}; 51 JSTaggedType *prevPrimitiveNext_; 52 JSTaggedType *prevPrimitiveEnd_; 53 int prevPrimitiveStorageIndex_ {-1}; 54 55 NO_COPY_SEMANTIC(EcmaHandleScope); 56 NO_MOVE_SEMANTIC(EcmaHandleScope); 57 }; 58 } // namespace panda::ecmascript 59 #endif // ECMASCRIPT_HANDLE_SCOPE_H 60