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_MEM_FREE_OBJECT_SET_H 17 #define ECMASCRIPT_MEM_FREE_OBJECT_SET_H 18 19 #include <cstdint> 20 21 #include "libpandabase/macros.h" 22 23 namespace panda::ecmascript { 24 using SetType = int32_t; 25 26 class FreeObject; 27 28 class FreeObjectSet { 29 public: FreeObjectSet(SetType type)30 FreeObjectSet(SetType type) : setType_(type) 31 { 32 Rebuild(); 33 } 34 ~FreeObjectSet() = default; 35 Empty()36 inline bool Empty() const 37 { 38 return available_ == 0; 39 } 40 Available()41 inline size_t Available() const 42 { 43 return available_; 44 } 45 46 void Free(uintptr_t begin, size_t size); 47 48 void Rebuild(); 49 50 FreeObject *LookupSmallFreeObject(size_t size); 51 FreeObject *LookupLargeFreeObject(size_t size); 52 FreeObject *ObtainSmallFreeObject(size_t size); 53 FreeObject *ObtainLargeFreeObject(size_t size); 54 55 NO_COPY_SEMANTIC(FreeObjectSet); 56 NO_MOVE_SEMANTIC(FreeObjectSet); 57 58 static constexpr SetType INVALID_SET_TYPE = -1; 59 60 private: 61 FreeObjectSet *next_ = nullptr; 62 FreeObjectSet *prev_ = nullptr; 63 SetType setType_ = INVALID_SET_TYPE; 64 size_t available_ = 0; 65 bool isAdded_ = false; 66 FreeObject *freeObject_ = nullptr; 67 68 friend class FreeObjectList; 69 }; 70 } // namespace panda::ecmascript 71 #endif // ECMASCRIPT_MEM_FREE_OBJECT_SET_H 72