update

paddle/fluid/operators/detail/grpc_server.cc

@@ -208,6 +208,11 @@ void AsyncGRPCServer::WaitClientGet(int count) {
   }
 }
 
+bool AsyncGRPCServer::WaitServerReady() {
+  std::unique_lock<std::mutex> lock(this->mutex_ready_);
+  condition_ready_.wait(lock, [&] { return this->ready_ == 1; });
+}
+
 void AsyncGRPCServer::RunSyncUpdate() {
   ::grpc::ServerBuilder builder;
   builder.AddListeningPort(address_, ::grpc::InsecureServerCredentials(),