fs module

// file.cc
static void ReadDir(const FunctionCallbackInfo<Value>& args) {
  HandleScope scope(env->isolate());

  // ...

  node::Utf8Value path(args[0]);

  if (args[1]->IsFunction()) {
    ASYNC_CALL(readdir, args[1], *path, 0 /*flags*/)
  } else {
    SYNC_CALL(readdir, *path, *path, 0 /*flags*/)

    char* namebuf = static_cast<char*>(SYNC_REQ.ptr);
    uint32_t nnames = SYNC_REQ.result;
    Local<Array> names = Array::New(env->isolate(), nnames);

    for (uint32_t i = 0; i < nnames; ++i) {
      names->Set(i, String::NewFromUtf8(env->isolate(), namebuf));
      namebuf += strlen(namebuf) + 1;
    }

    args.GetReturnValue().Set(names);
  }
}