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