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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-16 17:19:38 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-16 17:19:38 +0000 |
commit | 74e863032ed58ce23f1a0a334f5314d5b1a445bf (patch) | |
tree | ab1b7d0dc61f849c6c69451eff7070d9737e773e /nuttx/fs/fs_poll.c | |
parent | c2dd0fae35b41568b8d8d820587618da29b80a39 (diff) | |
download | px4-nuttx-74e863032ed58ce23f1a0a334f5314d5b1a445bf.tar.gz px4-nuttx-74e863032ed58ce23f1a0a334f5314d5b1a445bf.tar.bz2 px4-nuttx-74e863032ed58ce23f1a0a334f5314d5b1a445bf.zip |
Basic file structure for poll() API
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1257 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/fs/fs_poll.c')
-rw-r--r-- | nuttx/fs/fs_poll.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/nuttx/fs/fs_poll.c b/nuttx/fs/fs_poll.c new file mode 100644 index 000000000..7b1db1f41 --- /dev/null +++ b/nuttx/fs/fs_poll.c @@ -0,0 +1,97 @@ +/**************************************************************************** + * fs/fs_poll.c + * + * Copyright (C) 2008 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 <sys/types.h> +#include <poll.h> +#include <errno.h> + +#include <nuttx/fs.h> +#include "fs_internal.h" + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: poll + * + * Description: + * poll() waits for one of a set of file descriptors to become ready to + * perform I/O. If none of the events requested (and no error) has + * occurred for any of the file descriptors, then poll() blocks until + * one of the events occurs. + * + * Inputs: + * fds - List of structures describing file descriptors to be monitored + * nfds - The number of entries in the list + * timeout - Specifies an upper limit on the time for which poll() will + * block in milliseconds. A negative value of timeout means an infinite + * timeout. + * + * Return: + * On success, the number of structures that have nonzero revents fields. + * A value of 0 indicates that the call timed out and no file descriptors + * were ready. On error, -1 is returned, and errno is set appropriately: + * + * EBADF - An invalid file descriptor was given in one of the sets. + * EFAULT - The fds address is invalid + * EINTR - A signal occurred before any requested event. + * EINVAL - The nfds value exceeds a system limit. + * ENOMEM - There was no space to allocate internal data structures. + * ENOSYS - One or more of the drivers supporting the file descriptor + * does not support the poll method. + * + ****************************************************************************/ + +int poll(FAR struct pollfd *fds, nfds_t nfds, int timeout) +{ +#ifdef CONFIG_CPP_HAVE_WARNING +# warning To be provided +#endif + + errno = ENOSYS; + return ERROR; +} + |