1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#include <cppgc/allocation.h>
#include <cppgc/garbage-collected.h>
#include <cppgc/heap.h>
#include <node.h>
#include <v8-cppgc.h>
#include <v8.h>
#include <algorithm>
class CppGCed : public cppgc::GarbageCollected<CppGCed> {
public:
static uint16_t states[2];
static constexpr int kDestructCount = 0;
static constexpr int kTraceCount = 1;
static void New(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::Isolate* isolate = args.GetIsolate();
v8::Local<v8::Object> js_object = args.This();
CppGCed* gc_object = cppgc::MakeGarbageCollected<CppGCed>(
isolate->GetCppHeap()->GetAllocationHandle());
node::SetCppgcReference(isolate, js_object, gc_object);
args.GetReturnValue().Set(js_object);
}
static v8::Local<v8::Function> GetConstructor(
v8::Local<v8::Context> context) {
auto ft = v8::FunctionTemplate::New(context->GetIsolate(), New);
auto ot = ft->InstanceTemplate();
v8::WrapperDescriptor descriptor =
context->GetIsolate()->GetCppHeap()->wrapper_descriptor();
uint16_t required_size = std::max(descriptor.wrappable_instance_index,
descriptor.wrappable_type_index);
ot->SetInternalFieldCount(required_size + 1);
return ft->GetFunction(context).ToLocalChecked();
}
CppGCed() = default;
~CppGCed() { states[kDestructCount]++; }
void Trace(cppgc::Visitor* visitor) const { states[kTraceCount]++; }
};
uint16_t CppGCed::states[] = {0, 0};
void InitModule(v8::Local<v8::Object> exports) {
v8::Isolate* isolate = v8::Isolate::GetCurrent();
auto context = isolate->GetCurrentContext();
auto store = v8::ArrayBuffer::NewBackingStore(
CppGCed::states,
sizeof(uint16_t) * 2,
[](void*, size_t, void*) {},
nullptr);
auto ab = v8::ArrayBuffer::New(isolate, std::move(store));
exports
->Set(context,
v8::String::NewFromUtf8(isolate, "CppGCed").ToLocalChecked(),
CppGCed::GetConstructor(context))
.FromJust();
exports
->Set(context,
v8::String::NewFromUtf8(isolate, "states").ToLocalChecked(),
v8::Uint16Array::New(ab, 0, 2))
.FromJust();
exports
->Set(context,
v8::String::NewFromUtf8(isolate, "kDestructCount").ToLocalChecked(),
v8::Integer::New(isolate, CppGCed::kDestructCount))
.FromJust();
exports
->Set(context,
v8::String::NewFromUtf8(isolate, "kTraceCount").ToLocalChecked(),
v8::Integer::New(isolate, CppGCed::kTraceCount))
.FromJust();
}
NODE_MODULE(NODE_GYP_MODULE_NAME, InitModule)
|
