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