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/ic/proto_change_details.h"
17 #include "ecmascript/weak_vector.h"
18
19 namespace panda::ecmascript {
Add(const JSThread * thread,const JSHandle<ChangeListener> & array,const JSHandle<JSHClass> & value,uint32_t * index)20 JSHandle<ChangeListener> ChangeListener::Add(const JSThread *thread, const JSHandle<ChangeListener> &array,
21 const JSHandle<JSHClass> &value, uint32_t *index)
22 {
23 JSTaggedValue weakValue;
24 if (!array->Full()) {
25 weakValue = JSTaggedValue(value.GetTaggedValue().CreateAndGetWeakRef());
26 uint32_t arrayIndex = array->PushBack(thread, weakValue);
27 if (arrayIndex != TaggedArray::MAX_ARRAY_INDEX) {
28 if (index != nullptr) {
29 *index = arrayIndex;
30 }
31 return array;
32 }
33 LOG_ECMA(FATAL) << "this branch is unreachable";
34 UNREACHABLE();
35 }
36 // if exist hole, use it.
37 uint32_t holeIndex = CheckHole(array);
38 if (holeIndex != TaggedArray::MAX_ARRAY_INDEX) {
39 weakValue = JSTaggedValue(value.GetTaggedValue().CreateAndGetWeakRef());
40 array->Set(thread, holeIndex, weakValue);
41 if (index != nullptr) {
42 *index = holeIndex;
43 }
44 return array;
45 }
46 // the vector is full and no hole exists.
47 JSHandle<WeakVector> newArray = WeakVector::Grow(thread, JSHandle<WeakVector>(array), array->GetCapacity() + 1);
48 weakValue = JSTaggedValue(value.GetTaggedValue().CreateAndGetWeakRef());
49 uint32_t arrayIndex = newArray->PushBack(thread, weakValue);
50 ASSERT(arrayIndex != TaggedArray::MAX_ARRAY_INDEX);
51 if (index != nullptr) {
52 *index = arrayIndex;
53 }
54 return JSHandle<ChangeListener>(newArray);
55 }
56
CheckHole(const JSHandle<ChangeListener> & array)57 uint32_t ChangeListener::CheckHole(const JSHandle<ChangeListener> &array)
58 {
59 for (uint32_t i = 0; i < array->GetEnd(); i++) {
60 JSTaggedValue value = array->Get(i);
61 if (value.IsHole() || value.IsUndefined()) {
62 return i;
63 }
64 }
65 return TaggedArray::MAX_ARRAY_INDEX;
66 }
67
Get(uint32_t index)68 JSTaggedValue ChangeListener::Get(uint32_t index)
69 {
70 JSTaggedValue value = WeakVector::Get(index);
71 if (!value.IsHeapObject()) {
72 return value;
73 }
74 return JSTaggedValue(value.GetTaggedWeakRef());
75 }
76 } // namespace panda::ecmascript