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- /****************************************************************************
- * libs/libnx/nxmu/nx_eventnotify.c
- *
- * Copyright (C) 2008-2009, 2011, 2013 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 <nuttx/nx/nxmu.h>
- #ifndef CONFIG_DISABLE_SIGNALS
- /****************************************************************************
- * 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 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 */
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