why no v8 code in AsyncWork

[dwdwdw]

I have some work to do in AsyncWork, like transforming c struct into v8::Object. So I have to write v8 code in AsyncWork.
How can I manage this?

[Talbot3]

just to use callback function,like this:
// addon.cc
#include <node.h>

namespace demo {

using v8::Function;
using v8::FunctionCallbackInfo;
using v8::Isolate;
using v8::Local;
using v8::Null;
using v8::Object;
using v8::String;
using v8::Value;

void RunCallback(const FunctionCallbackInfo& args) {
Isolate* isolate = args.GetIsolate();
Local cb = Local::Cast(args[0]);
const unsigned argc = 1;
Local argv[argc] = { String::NewFromUtf8(isolate, "hello world") };
cb->Call(Null(isolate), argc, argv);
}

void Init(Local exports, Local module) {
NODE_SET_METHOD(module, "exports", RunCallback);
}

NODE_MODULE(addon, Init)

} // namespace demo
Note that this example uses a two-argument form of Init() that receives the full module object as the second argument. This allows the Addon to completely overwrite exports with a single function instead of adding the function as a property of exports.

To test it, run the following JavaScript:

// test.js
const addon = require('./build/Release/addon');

addon((msg) => {
console.log(msg); // 'hello world'
});
Note that, in this example, the callback function is invoked synchronously.