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111 lines
4.4 KiB
111 lines
4.4 KiB
/**************************************************************************** |
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* graphics/nxmu/nx_eventnotify.c |
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* |
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* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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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 "nxfe.h" |
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#ifndef CONFIG_DISABLE_SIGNALS |
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/**************************************************************************** |
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* Pre-Processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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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 client |
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* 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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* Return: |
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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 nxfe_conn_s *conn = (FAR struct nxfe_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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#endif /* CONFIG_DISABLE_SIGNALS */
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