/**************************************************************************** * net/socket/net_poll.c * * Copyright (C) 2008-2009, 2011-2015, 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 <assert.h> #include <errno.h> #include <nuttx/net/net.h> #include "socket/socket.h" #if defined(CONFIG_NET) && !defined(CONFIG_DISABLE_POLL) /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: psock_poll * * Description: * The standard poll() operation redirects operations on socket descriptors * to this function. * * Input Parameters: * psock - An instance of the internal socket structure. * fds - The structure describing the events to be monitored, OR NULL if * this is a request to stop monitoring events. * setup - true: Setup up the poll; false: Teardown the poll * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ int psock_poll(FAR struct socket *psock, FAR struct pollfd *fds, bool setup) { DEBUGASSERT(psock != NULL && fds != NULL); /* Let the address family's poll() method handle the operation */ DEBUGASSERT(psock->s_sockif != NULL && psock->s_sockif->si_poll != NULL); return psock->s_sockif->si_poll(psock, fds, setup); } /**************************************************************************** * Name: net_poll * * Description: * The standard poll() operation redirects operations on socket descriptors * to this function. * * Input Parameters: * fd - The socket descriptor of interest * fds - The structure describing the events to be monitored, OR NULL if * this is a request to stop monitoring events. * setup - true: Setup up the poll; false: Teardown the poll * * Returned Value: * 0: Success; Negated errno on failure * ****************************************************************************/ int net_poll(int sockfd, struct pollfd *fds, bool setup) { FAR struct socket *psock; DEBUGASSERT(fds != NULL); /* Get the underlying socket structure and verify that the sockfd * corresponds to valid, allocated socket */ psock = sockfd_socket(sockfd); if (!psock || psock->s_crefs <= 0) { return -EBADF; } /* Then let psock_poll() do the heavy lifting */ return psock_poll(psock, fds, setup); } #endif /* CONFIG_NET && !CONFIG_DISABLE_POLL */