cdev_platform.cpp
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/****************************************************************************
*
* Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
*
* 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 PX4 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.
*
****************************************************************************/
/**
* @file cdev_platform.cpp
*
* NuttX Character device functions
*/
#include "cdev_platform.hpp"
#include "../CDev.hpp"
#include <px4_platform_common/posix.h>
#include <sys/ioctl.h>
#ifdef CONFIG_DISABLE_POLL
# error This driver is not compatible with CONFIG_DISABLE_POLL
#endif
namespace cdev
{
/*
* The standard NuttX operation dispatch table can't call C++ member functions
* directly, so we have to bounce them through this dispatch table.
*/
static int cdev_open(file_t *filp);
static int cdev_close(file_t *filp);
static ssize_t cdev_read(file_t *filp, char *buffer, size_t buflen);
static ssize_t cdev_write(file_t *filp, const char *buffer, size_t buflen);
static off_t cdev_seek(file_t *filp, off_t offset, int whence);
static int cdev_ioctl(file_t *filp, int cmd, unsigned long arg);
static int cdev_poll(file_t *filp, px4_pollfd_struct_t *fds, bool setup);
/**
* Character device indirection table.
*
* Every cdev we register gets the same function table; we use the private data
* field in the inode to store the instance pointer.
*
* Note that we use the GNU extension syntax here because we don't get designated
* initialisers in gcc 4.6.
*/
const struct file_operations cdev::CDev::fops = {
open : cdev_open,
close : cdev_close,
read : cdev_read,
write : cdev_write,
seek : cdev_seek,
ioctl : cdev_ioctl,
poll : cdev_poll,
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
unlink : nullptr
#endif
};
static int
cdev_open(file_t *filp)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->open(filp);
}
static int
cdev_close(file_t *filp)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->close(filp);
}
static ssize_t
cdev_read(file_t *filp, char *buffer, size_t buflen)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->read(filp, buffer, buflen);
}
static ssize_t
cdev_write(file_t *filp, const char *buffer, size_t buflen)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->write(filp, buffer, buflen);
}
static off_t
cdev_seek(file_t *filp, off_t offset, int whence)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->seek(filp, offset, whence);
}
static int
cdev_ioctl(file_t *filp, int cmd, unsigned long arg)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->ioctl(filp, cmd, arg);
}
static int
cdev_poll(file_t *filp, px4_pollfd_struct_t *fds, bool setup)
{
cdev::CDev *cdev = (cdev::CDev *)(filp->f_inode->i_private);
return cdev->poll(filp, fds, setup);
}
} // namespace cdev