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Gregory Nutt 2017-10-14 14:39:06 -06:00
parent 7e151940cc
commit f05351c3b5
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examples/nxhello/nxhello_listener.c Normal file
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/****************************************************************************
* examples/nxterm/nxhello_listener.c
*
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <nuttx/nx/nx.h>
#include "nxhello.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxhello_listener
****************************************************************************/
FAR void *nxhello_listener(FAR void *arg)
{
int ret;
/* Process events forever */
for (;;)
{
/* Handle the next event. If we were configured blocking, then
* we will stay right here until the next event is received. Since
* we have dedicated a while thread to servicing events, it would
* be most natural to also select CONFIG_NX_BLOCKING -- if not, the
* following would be a tight infinite loop (unless we added addition
* logic with nx_eventnotify and sigwait to pace it).
*/
ret = nx_eventhandler(g_nxhello.hnx);
if (ret < 0)
{
/* An error occurred... assume that we have lost connection with
* the server.
*/
printf("nxhello_listener: Lost server connection: %d\n", errno);
exit(EXIT_FAILURE);
}
/* If we received a message, we must be connected */
if (!g_nxhello.connected)
{
g_nxhello.connected = true;
sem_post(&g_nxhello.eventsem);
printf("nxhello_listener: Connected\n");
}
}
}