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_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 /* 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 class EcmaHandleScope { 29 public: 30 inline explicit EcmaHandleScope(JSThread *thread); 31 32 inline ~EcmaHandleScope(); 33 34 static inline uintptr_t NewHandle(JSThread *thread, JSTaggedType value); 35 GetThread()36 JSThread *GetThread() const 37 { 38 return thread_; 39 } 40 41 private: 42 JSThread *thread_; 43 JSTaggedType *prevNext_; 44 JSTaggedType *prevEnd_; 45 int prevHandleStorageIndex_{-1}; 46 47 NO_COPY_SEMANTIC(EcmaHandleScope); 48 NO_MOVE_SEMANTIC(EcmaHandleScope); 49 }; 50 } // namespace panda::ecmascript 51 #endif // ECMASCRIPT_HANDLE_SCOPE_H 52