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Diffstat (limited to 'nuttx/graphics/nxmu/nx_eventnotify.c')
-rw-r--r-- | nuttx/graphics/nxmu/nx_eventnotify.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/nuttx/graphics/nxmu/nx_eventnotify.c b/nuttx/graphics/nxmu/nx_eventnotify.c new file mode 100644 index 000000000..189241361 --- /dev/null +++ b/nuttx/graphics/nxmu/nx_eventnotify.c @@ -0,0 +1,111 @@ +/**************************************************************************** + * graphics/nxmu/nx_eventnotify.c + * + * Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 */ |