forked from Archive/PX4-Autopilot
112 lines
4.4 KiB
C
112 lines
4.4 KiB
C
/****************************************************************************
|
|
* graphics/nxmu/nx_eventnotify.c
|
|
*
|
|
* Copyright (C) 2008-2009, 2011 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 <stdlib.h>
|
|
#include <mqueue.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/nx/nx.h>
|
|
#include "nxfe.h"
|
|
|
|
#ifndef CONFIG_DISABLE_SIGNALS
|
|
|
|
/****************************************************************************
|
|
* Pre-Processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Types
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* 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
|
|
*
|
|
* Return:
|
|
* 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 nxfe_conn_s *conn = (FAR struct nxfe_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);
|
|
}
|
|
|
|
#endif /* CONFIG_DISABLE_SIGNALS */
|