node-addon

addon.cc

#include <node.h>

using namespace v8;

struct point {
	int x;
	int y;
};

void pointerFunction(point* p) {
	p->x = 99;
	p->y = 11;
}

Handle<Value> GetPoint(const Arguments& args) {
	HandleScope scope;
	point* p = new point;
	pointerFunction(p);
	Local<Object> obj = Object::New();
	obj->Set(String::NewSymbol("x"), Number::New(p->x));
	obj->Set(String::NewSymbol("y"), Number::New(p->y));
	delete p;
	return scope.Close(obj);
}

void InitAll(Handle<Object> exports) {
	exports->Set(String::NewSymbol("GetPoint"), FunctionTemplate::New(GetPoint)->GetFunction());
}

NODE_MODULE(addon, InitAll)

addon.js

var addon = require('./build/Release/addon');

setInterval(function () {
	console.log(addon.GetPoint());
}, 100);

binding.gyp

{
  "targets": [
    {
      "target_name": "addon",
      "sources": [ "addon.cc" ]
    }
  ]
}