int main(int argc, char* argv[]) {
   // Register buffer
   sp<ProcessState> proc(ProcessState::self());
   sp<IServiceManager> sm = defaultServiceManager();
   // Register service
   sm->addService(String16("helloWorld"),new HelloWorld());
   // Start waiting for transactions
   ProcessState::self()->startThreadPool();
   IPCThreadState::self()->joinThreadPool();
 }