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 FOUNDATION_ACE_NAPI_NATIVE_ENGINE_ARK_NATIVE_REFERENCE_H
17 #define FOUNDATION_ACE_NAPI_NATIVE_ENGINE_ARK_NATIVE_REFERENCE_H
18 
19 #include "ark_native_engine.h"
20 #include "ecmascript/napi/include/jsnapi.h"
21 #include "native_engine/native_reference.h"
22 #include "native_engine/native_value.h"
23 
24 class ArkNativeEngine;
25 
26 using EcmaVM = panda::EcmaVM;
27 using panda::Global;
28 using JSValueRef = panda::JSValueRef;
29 using panda::Local;
30 using LocalScope = panda::LocalScope;
31 
32 enum class FinalizerState {
33     DESTRUCTION,
34     COLLECTION,
35 };
36 
37 class ArkNativeReference : public NativeReference {
38 public:
39     ArkNativeReference(ArkNativeEngine* engine,
40                        napi_value value,
41                        uint32_t initialRefcount,
42                        bool deleteSelf = false,
43                        NapiNativeFinalize napiCallback = nullptr,
44                        void* data = nullptr,
45                        void* hint = nullptr,
46                        bool isAsyncCall = false,
47                        size_t nativeBindingSize = 0);
48     ArkNativeReference(ArkNativeEngine* engine,
49                        Local<JSValueRef> value,
50                        uint32_t initialRefcount,
51                        bool deleteSelf,
52                        NapiNativeFinalize napiCallback,
53                        void* data,
54                        void* hint,
55                        bool isAsyncCall = false,
56                        size_t nativeBindingSize = 0);
57     ~ArkNativeReference() override;
58 
59     uint32_t Ref() override;
60     uint32_t Unref() override;
61     napi_value Get() override;
62     napi_value Get(NativeEngine* engine) override;
63     void* GetData() override;
64     operator napi_value() override;
65     void SetDeleteSelf() override;
66     bool GetDeleteSelf() const override;
67     uint32_t GetRefCount() override;
68     bool GetFinalRun() override;
69     napi_value GetNapiValue() override;
70     void ResetFinalizer()  override;
71 
72 private:
ArkNativeReferenceConstructor(uint32_t initialRefCount,bool deleteSelf)73     inline void ArkNativeReferenceConstructor(uint32_t initialRefCount, bool deleteSelf)
74     {
75         if (initialRefCount == 0) {
76             value_.SetWeakCallback(reinterpret_cast<void*>(this), FreeGlobalCallBack, NativeFinalizeCallBack);
77         }
78 
79         if (deleteSelf) {
80             NativeReferenceManager* referenceManager = engine_->GetReferenceManager();
81             if (referenceManager != nullptr) {
82                 referenceManager->CreateHandler(this);
83             }
84         }
85 
86         engineId_ = engine_->GetId();
87     }
88 
89     ArkNativeEngine* engine_;
90     uint64_t engineId_ {0};
91 
92     Global<JSValueRef> value_;
93     uint32_t refCount_ {0};
94     bool deleteSelf_ {false};
95     bool isAsyncCall_ {false};
96 
97     bool hasDelete_ {false};
98     bool finalRun_ {false};
99     NapiNativeFinalize napiCallback_ {nullptr};
100     void* data_ {nullptr};
101     void* hint_ {nullptr};
102     size_t nativeBindingSize_ {0};
103 
104     NativeReference* prev_ {nullptr};
105     NativeReference* next_ {nullptr};
106 
107     void FinalizeCallback(FinalizerState state);
108 
109     static void FreeGlobalCallBack(void* ref);
110     static void NativeFinalizeCallBack(void* ref);
111     friend class NativeReferenceManager;
112 };
113 
114 #endif /* FOUNDATION_ACE_NAPI_NATIVE_ENGINE_ARK_NATIVE_REFERENCE_H */
115