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 "quickjs_headers.h"
17
18 #include "native_value/quickjs_native_value.h"
19 #include "quickjs_native_reference.h"
20
QuickJSNativeReference(QuickJSNativeEngine * engine,NativeValue * value,uint32_t initialRefcount,NativeFinalize callback,void * data,void * hint)21 QuickJSNativeReference::QuickJSNativeReference(
22 QuickJSNativeEngine* engine, NativeValue* value, uint32_t initialRefcount,
23 NativeFinalize callback, void* data, void* hint)
24 : engine_(engine), value_(*value), refCount_(initialRefcount), callback_(callback), data_(data),
25 hint_(hint)
26 {
27 for (uint32_t i = 0; i < initialRefcount; i++) {
28 JS_DupValue(engine_->GetContext(), value_);
29 }
30 }
31
~QuickJSNativeReference()32 QuickJSNativeReference::~QuickJSNativeReference()
33 {
34 while (refCount_) {
35 refCount_--;
36 if (refCount_ == 0) {
37 FinalizeCallback();
38 }
39 JS_FreeValue(engine_->GetContext(), value_);
40 }
41 }
42
Ref()43 uint32_t QuickJSNativeReference::Ref()
44 {
45 if (refCount_ >= 0) {
46 ++refCount_;
47 JS_DupValue(engine_->GetContext(), value_);
48 }
49 return refCount_;
50 }
51
Unref()52 uint32_t QuickJSNativeReference::Unref()
53 {
54 if (refCount_ > 0) {
55 --refCount_;
56 if (refCount_ == 0) {
57 FinalizeCallback();
58 }
59 JS_FreeValue(engine_->GetContext(), value_);
60 }
61 return refCount_;
62 }
63
Get()64 NativeValue* QuickJSNativeReference::Get()
65 {
66 return QuickJSNativeEngine::JSValueToNativeValue(engine_, JS_DupValue(engine_->GetContext(), value_));
67 }
68
operator NativeValue*()69 QuickJSNativeReference::operator NativeValue*()
70 {
71 return Get();
72 }
73
FinalizeCallback(void)74 void QuickJSNativeReference::FinalizeCallback(void)
75 {
76 if (callback_ != nullptr) {
77 callback_(engine_, data_, hint_);
78 JS_FreeFinalizer(value_);
79 }
80 callback_ = nullptr;
81 data_ = nullptr;
82 hint_ = nullptr;
83 }
84