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_TLAB_ALLOCATOR_H
17 #define ECMASCRIPT_MEM_TLAB_ALLOCATOR_H
18 
19 #include "ecmascript/mem/allocator-inl.h"
20 
21 namespace panda::ecmascript {
22 class Heap;
23 
24 class TlabAllocatorBase {
25 public:
26     TlabAllocatorBase() = default;
27     ~TlabAllocatorBase() = default;
28     NO_COPY_SEMANTIC(TlabAllocatorBase);
29     NO_MOVE_SEMANTIC(TlabAllocatorBase);
30 };
31 
32 class TlabAllocator : public TlabAllocatorBase {
33 public:
34     TlabAllocator() = delete;
35     inline explicit TlabAllocator(Heap *heap);
~TlabAllocator()36     ~TlabAllocator()
37     {
38         delete localSpace_;
39     }
40 
41     NO_COPY_SEMANTIC(TlabAllocator);
42     NO_MOVE_SEMANTIC(TlabAllocator);
43 
44     inline void Finalize();
45 
46     inline uintptr_t Allocate(size_t size, MemSpaceType space);
47 
48 private:
49     inline uintptr_t AllocateInYoungSpace(size_t size);
50     inline uintptr_t AllocateInOldSpace(size_t size);
51     inline uintptr_t AllocateInCompressSpace(size_t size);
52 
53     inline bool ExpandYoung();
54     inline bool ExpandCompressFromOld(size_t size);
55 
56     Heap *heap_;
57 
58     bool enableExpandYoung_;
59     bool enableStealOldRegion_;
60     BumpPointerAllocator youngAllocator_;
61 
62     LocalSpace *localSpace_;
63 };
64 
65 class SharedTlabAllocator : public TlabAllocatorBase {
66 public:
67     SharedTlabAllocator() = delete;
68     inline explicit SharedTlabAllocator(SharedHeap *sHeap);
~SharedTlabAllocator()69     ~SharedTlabAllocator()
70     {
71         delete sLocalSpace_;
72     }
73 
74     NO_COPY_SEMANTIC(SharedTlabAllocator);
75     NO_MOVE_SEMANTIC(SharedTlabAllocator);
76 
77     inline void Finalize();
78 
79     inline uintptr_t Allocate(size_t size, MemSpaceType space);
80 
81 private:
82     inline uintptr_t AllocateInCompressSpace(size_t size);
83     inline bool ExpandCompressFromOld(size_t size);
84 
85     SharedHeap *sHeap_;
86     SharedLocalSpace *sLocalSpace_;
87 };
88 }  // namespace panda::ecmascript
89 
90 #endif  // ECMASCRIPT_MEM_TLAB_ALLOCATOR_H
91