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 #include "ecmascript/weak_vector.h"
17
18 #include "ecmascript/object_factory.h"
19
20 namespace panda::ecmascript {
Create(const JSThread * thread,uint32_t capacity,MemSpaceType type)21 JSHandle<WeakVector> WeakVector::Create(const JSThread *thread, uint32_t capacity, MemSpaceType type)
22 {
23 ASSERT(capacity < MAX_VECTOR_INDEX);
24
25 uint32_t length = VectorToArrayIndex(capacity);
26 JSHandle<WeakVector> vector;
27 if (type == MemSpaceType::NON_MOVABLE) {
28 vector = JSHandle<WeakVector>(thread->GetEcmaVM()->GetFactory()
29 ->NewTaggedArray(length, JSTaggedValue::Hole(), MemSpaceType::NON_MOVABLE));
30 } else {
31 vector = JSHandle<WeakVector>(thread->GetEcmaVM()->GetFactory()->NewTaggedArray(length));
32 }
33
34 vector->SetEnd(thread, 0);
35 return vector;
36 }
37
Delete(const JSThread * thread,uint32_t index)38 bool WeakVector::Delete(const JSThread *thread, uint32_t index)
39 {
40 uint32_t end = GetEnd();
41 if (index < end) {
42 Set(thread, index, JSTaggedValue::Hole());
43 return true;
44 }
45 return false;
46 }
47
Grow(const JSThread * thread,const JSHandle<WeakVector> & old,uint32_t newCapacity)48 JSHandle<WeakVector> WeakVector::Grow(const JSThread *thread, const JSHandle<WeakVector> &old, uint32_t newCapacity)
49 {
50 uint32_t oldCapacity = old->GetCapacity();
51 ASSERT(newCapacity > oldCapacity);
52 if (oldCapacity == MAX_VECTOR_INDEX) {
53 return old;
54 }
55
56 if (newCapacity > MAX_VECTOR_INDEX) {
57 newCapacity = MAX_VECTOR_INDEX;
58 }
59
60 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
61 JSHandle<TaggedArray> newVec = factory->CopyArray(JSHandle<TaggedArray>(old), VectorToArrayIndex(oldCapacity),
62 VectorToArrayIndex(newCapacity));
63
64 return JSHandle<WeakVector>(newVec);
65 }
66
Append(const JSThread * thread,const JSHandle<WeakVector> & vec,const JSHandle<JSTaggedValue> & value,ElementType type)67 JSHandle<WeakVector> WeakVector::Append(const JSThread *thread, const JSHandle<WeakVector> &vec,
68 const JSHandle<JSTaggedValue> &value, ElementType type)
69 {
70 if (!vec->Full()) {
71 JSTaggedValue storeVal = GetStoreVal(value, type);
72 vec->PushBack(thread, storeVal);
73 return vec;
74 }
75
76 return AppendToFullVec(thread, vec, value, type);
77 }
78
FillOrAppend(const JSThread * thread,const JSHandle<WeakVector> & vec,const JSHandle<JSTaggedValue> & value,ElementType type)79 JSHandle<WeakVector> WeakVector::FillOrAppend(const JSThread *thread, const JSHandle<WeakVector> &vec,
80 const JSHandle<JSTaggedValue> &value, ElementType type)
81 {
82 if (!vec->Full()) {
83 JSTaggedValue storeVal = GetStoreVal(value, type);
84 vec->PushBack(thread, storeVal);
85 return vec;
86 }
87
88 // if exist hole, use it.
89 uint32_t holeIndex = CheckHole(thread, vec);
90 if (holeIndex != TaggedArray::MAX_ARRAY_INDEX) {
91 JSTaggedValue storeVal = GetStoreVal(value, type);
92 vec->Set(thread, holeIndex, storeVal);
93 return vec;
94 }
95
96 return AppendToFullVec(thread, vec, value, type);
97 }
98
AppendToFullVec(const JSThread * thread,const JSHandle<WeakVector> & vec,const JSHandle<JSTaggedValue> & value,ElementType type)99 JSHandle<WeakVector> WeakVector::AppendToFullVec(const JSThread *thread, const JSHandle<WeakVector> &vec,
100 const JSHandle<JSTaggedValue> &value, ElementType type)
101 {
102 uint32_t newCapacity = vec->GetCapacity() + DEFAULT_GROW_SIZE;
103 JSHandle<WeakVector> newVec = WeakVector::Grow(thread, JSHandle<WeakVector>(vec), newCapacity);
104 JSTaggedValue storeVal = GetStoreVal(value, type);
105 [[maybe_unused]] uint32_t index = newVec->PushBack(thread, storeVal);
106 ASSERT(index != TaggedArray::MAX_ARRAY_INDEX);
107 return newVec;
108 }
109
GetStoreVal(const JSHandle<JSTaggedValue> & value,ElementType type)110 JSTaggedValue WeakVector::GetStoreVal(const JSHandle<JSTaggedValue> &value, ElementType type)
111 {
112 if (type == ElementType::NORMAL) {
113 return value.GetTaggedValue();
114 }
115
116 if (value->IsHeapObject()) {
117 return value->CreateAndGetWeakRef();
118 }
119 return value.GetTaggedValue();
120 }
121
Copy(const JSThread * thread,const JSHandle<WeakVector> & vec,bool needExtend)122 JSHandle<WeakVector> WeakVector::Copy(const JSThread *thread, const JSHandle<WeakVector> &vec,
123 bool needExtend)
124 {
125 uint32_t capacity = vec->GetCapacity();
126 uint32_t oldLength = VectorToArrayIndex(capacity);
127 if (needExtend) {
128 capacity += DEFAULT_GROW_SIZE;
129 }
130 uint32_t newLength = VectorToArrayIndex(capacity);
131 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
132 JSHandle<TaggedArray> newVec = factory->CopyArray(JSHandle<TaggedArray>(vec), oldLength, newLength);
133 return JSHandle<WeakVector>(newVec);
134 }
135
CheckHole(const JSThread * thread,const JSHandle<WeakVector> & vec)136 uint32_t WeakVector::CheckHole(const JSThread *thread, const JSHandle<WeakVector> &vec)
137 {
138 for (uint32_t i = 0; i < vec->GetEnd(); i++) {
139 JSTaggedValue value = vec->Get(thread, i);
140 if (value.IsHole()) {
141 return i;
142 }
143 }
144 return TaggedArray::MAX_ARRAY_INDEX;
145 }
146
PushBack(const JSThread * thread,JSTaggedValue value)147 uint32_t WeakVector::PushBack(const JSThread *thread, JSTaggedValue value)
148 {
149 uint32_t end = GetEnd();
150 if (end == GetCapacity()) {
151 return TaggedArray::MAX_ARRAY_INDEX;
152 }
153
154 Set(thread, end, value);
155 SetEnd(thread, end + 1);
156 return end;
157 }
158 } // namespace panda::ecmascript
159