119 lines
4.2 KiB
C
119 lines
4.2 KiB
C
/****************************************************************************
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* net/socket/net_poll.c
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*
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* Copyright (C) 2008-2009, 2011-2015, 2017 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 <assert.h>
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#include <errno.h>
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#include <nuttx/net/net.h>
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#include "socket/socket.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: psock_poll
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*
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* Description:
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* The standard poll() operation redirects operations on socket descriptors
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* to this function.
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*
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* Input Parameters:
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* psock - An instance of the internal socket structure.
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* fds - The structure describing the events to be monitored, OR NULL if
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* this is a request to stop monitoring events.
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* setup - true: Setup up the poll; false: Teardown the poll
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*
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* Returned Value:
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* 0: Success; Negated errno on failure
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*
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****************************************************************************/
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int psock_poll(FAR struct socket *psock, FAR struct pollfd *fds, bool setup)
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{
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DEBUGASSERT(psock != NULL && fds != NULL);
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/* Let the address family's poll() method handle the operation */
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DEBUGASSERT(psock->s_sockif != NULL && psock->s_sockif->si_poll != NULL);
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return psock->s_sockif->si_poll(psock, fds, setup);
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}
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/****************************************************************************
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* Name: net_poll
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*
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* Description:
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* The standard poll() operation redirects operations on socket descriptors
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* to this function.
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*
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* Input Parameters:
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* fd - The socket descriptor of interest
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* fds - The structure describing the events to be monitored, OR NULL if
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* this is a request to stop monitoring events.
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* setup - true: Setup up the poll; false: Teardown the poll
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*
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* Returned Value:
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* 0: Success; Negated errno on failure
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*
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****************************************************************************/
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int net_poll(int sockfd, struct pollfd *fds, bool setup)
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{
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FAR struct socket *psock;
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DEBUGASSERT(fds != NULL);
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/* Get the underlying socket structure and verify that the sockfd
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* corresponds to valid, allocated socket
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*/
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psock = sockfd_socket(sockfd);
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if (!psock || psock->s_crefs <= 0)
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{
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return -EBADF;
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}
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/* Then let psock_poll() do the heavy lifting */
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return psock_poll(psock, fds, setup);
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}
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