addon.cpp

/* wrapper.cpp */

void SetProcessEmitter(const FunctionCallbackInfo<Value> &args)
{
  Nan::Callback *callback = new Nan::Callback(args[0].As<Function>());
  setProcessEmit(callback);
}

/* handlers.cpp */
void asyncmsg(uv_async_t *handle)
{
  Nan::HandleScope scope;
  v8::Isolate *isolate = v8::Isolate::GetCurrent();
  Local<Value> args[] = {
    String::NewFromUtf8(isolate, "test"),
    String::NewFromUtf8(isolate, readableData),
  };
  cb->Call(2, args);
}

void setProcessEmit(Nan::Callback *callback)
{
  cb = callback;
  loop = uv_default_loop();
  uv_async_init(loop, &async, asyncmsg);
}

/* init.js */
// Load addon
const t = require('./build/Release/addon');
// Connect to the scanner
t.start();
// Logging function
var f = function f(i) { console.log(i); };
// Display everything caught from this event
process.on("test", f);
// Send function to use -> Call first function in this gist
t.setProcessEmitter(process.emit);