1 /* 2 * Copyright (c) 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_SUSTAINING_JS_HANDLE_H 17 #define ECMASCRIPT_SUSTAINING_JS_HANDLE_H 18 19 #include "ecmascript/common.h" 20 #include "ecmascript/platform/mutex.h" 21 #include "ecmascript/ecma_vm.h" 22 23 namespace panda::ecmascript { 24 25 class SustainingJSHandle { 26 public: 27 SustainingJSHandle(EcmaVM *vm); 28 ~SustainingJSHandle(); 29 template <typename T> NewHandle(JSHandle<T> value)30 JSHandle<T> NewHandle(JSHandle<T> value) 31 { 32 return JSHandle<T>(GetJsHandleSlot(value.GetTaggedType())); 33 } 34 35 template <typename T> NewHandle(JSTaggedType value)36 JSHandle<T> NewHandle(JSTaggedType value) 37 { 38 return JSHandle<T>(GetJsHandleSlot(value)); 39 } 40 41 template <typename T> NewHandle(const JitThread * thread,JSTaggedType value)42 static JSHandle<T> NewHandle(const JitThread *thread, JSTaggedType value) 43 { 44 return JSHandle<T>(GetJsHandleSlot(thread, value)); 45 } 46 47 void Iterate(RootVisitor &v); 48 49 private: 50 uintptr_t GetJsHandleSlot(JSTaggedType value); 51 static uintptr_t GetJsHandleSlot(const JitThread *thread, JSTaggedType value); 52 uintptr_t Expand(); 53 54 EcmaVM *vm_ { nullptr }; 55 56 JSTaggedType *blockNext_ { nullptr }; 57 JSTaggedType *blockLimit_ { nullptr }; 58 SustainingJSHandle *pre_ { nullptr }; 59 SustainingJSHandle *next_ { nullptr }; 60 61 static constexpr uint32_t BLOCK_SIZE = 256L; 62 std::vector<std::array<JSTaggedType, BLOCK_SIZE>*> handleBlocks_; 63 friend class SustainingJSHandleList; 64 }; 65 66 class SustainingJSHandleList { 67 public: 68 void AddSustainingJSHandle(SustainingJSHandle *sustainingJSHandle); 69 void RemoveSustainingJSHandle(SustainingJSHandle *sustainingJSHandle); 70 void Iterate(RootVisitor &v); 71 72 private: 73 SustainingJSHandle *listHead_ { nullptr }; 74 Mutex mutex_; 75 }; 76 } // namespace panda::ecmascript 77 #endif // ECMASCRIPT_SUSTAINING_JS_HANDLE_H 78