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 "v8_native_array_buffer.h"
17
18 struct V8NativeArrayBufferInfo {
CreateNewInstanceV8NativeArrayBufferInfo19 static V8NativeArrayBufferInfo* CreateNewInstance() { return new V8NativeArrayBufferInfo(); }
20 NativeEngine* engine = nullptr;
21 NativeFinalize cb = nullptr;
22 void* hint = nullptr;
23 };
24
V8NativeArrayBuffer(V8NativeEngine * engine,v8::Local<v8::Value> value)25 V8NativeArrayBuffer::V8NativeArrayBuffer(V8NativeEngine* engine, v8::Local<v8::Value> value)
26 : V8NativeObject(engine, value)
27 {
28 }
29
V8NativeArrayBuffer(V8NativeEngine * engine,uint8_t ** value,size_t length)30 V8NativeArrayBuffer::V8NativeArrayBuffer(V8NativeEngine* engine, uint8_t** value, size_t length)
31 : V8NativeArrayBuffer(engine, v8::Local<v8::Value>())
32 {
33 value_ = v8::ArrayBuffer::New(engine->GetIsolate(), length);
34 if (value != nullptr) {
35 v8::Local<v8::ArrayBuffer> obj = value_;
36 *value = (uint8_t*)obj->GetBackingStore()->Data();
37 }
38 }
39
V8NativeArrayBuffer(V8NativeEngine * engine,uint8_t * value,size_t length,NativeFinalize cb,void * hint)40 V8NativeArrayBuffer::V8NativeArrayBuffer(V8NativeEngine* engine,
41 uint8_t* value,
42 size_t length,
43 NativeFinalize cb,
44 void* hint)
45 : V8NativeArrayBuffer(engine, v8::Local<v8::Value>())
46 {
47 auto cbinfo = V8NativeArrayBufferInfo::CreateNewInstance();
48 if (cbinfo != nullptr) {
49 cbinfo->engine = engine_;
50 cbinfo->cb = cb;
51 cbinfo->hint = hint;
52 }
53
54 auto backingStore = v8::ArrayBuffer::NewBackingStore(
55 value, length,
56 [](void* data, size_t length, void* deleterData) -> void {
57 auto cbinfo = (V8NativeArrayBufferInfo*)deleterData;
58 if (cbinfo != nullptr) {
59 cbinfo->cb(cbinfo->engine, data, cbinfo->hint);
60 delete cbinfo;
61 }
62 },
63 cbinfo);
64
65 value_ = v8::ArrayBuffer::New(engine->GetIsolate(), std::shared_ptr<v8::BackingStore>(backingStore.release()));
66 }
67
~V8NativeArrayBuffer()68 V8NativeArrayBuffer::~V8NativeArrayBuffer() {}
69
GetInterface(int interfaceId)70 void* V8NativeArrayBuffer::GetInterface(int interfaceId)
71 {
72 return (NativeArrayBuffer::INTERFACE_ID == interfaceId) ? (NativeArrayBuffer*)this
73 : V8NativeObject::GetInterface(interfaceId);
74 }
75
GetBuffer()76 void* V8NativeArrayBuffer::GetBuffer()
77 {
78 v8::Local<v8::ArrayBuffer> v = value_;
79 return v->GetBackingStore()->Data();
80 }
81
GetLength()82 size_t V8NativeArrayBuffer::GetLength()
83 {
84 v8::Local<v8::ArrayBuffer> v = value_;
85 return v->ByteLength();
86 }
87