| /**************************************************************************** |
| * libs/libnx/nxmu/nx_eventnotify.c |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <stdlib.h> |
| #include <mqueue.h> |
| #include <assert.h> |
| #include <errno.h> |
| #include <debug.h> |
| |
| #include <nuttx/nx/nx.h> |
| #include <nuttx/nx/nxmu.h> |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: nx_eventnotify |
| * |
| * Description: |
| * Rather than calling nx_eventhandler periodically, the client may |
| * register to receive a signal when a server event is available. The |
| * client can then call nv_eventhandler() only when incoming events are |
| * available. |
| * |
| * Only one such event is issued. Upon receipt of the signal, if the |
| * client wishes further notifications, it must call nx_eventnotify again. |
| * |
| * Input Parameters: |
| * handle - the handle returned by nx_connect |
| * |
| * Returned Value: |
| * OK: No errors occurred. If CONFIG_NX_BLOCKING is defined, then |
| * one or more server message was processed. |
| * ERROR: An error occurred and errno has been set appropriately |
| * |
| ****************************************************************************/ |
| |
| int nx_eventnotify(NXHANDLE handle, int signo) |
| { |
| FAR struct nxmu_conn_s *conn = (FAR struct nxmu_conn_s *)handle; |
| struct sigevent se; |
| |
| se.sigev_notify = SIGEV_SIGNAL; |
| se.sigev_signo = signo; |
| se.sigev_value.sival_ptr = (FAR void *)handle; |
| |
| return mq_notify(conn->crdmq, &se); |
| } |